Communication system correction method and communication system correction device

Technical Field

The invention relates to communication system and method for correcting the associated circuit, for use on a particular quadrature amplitude modulation of the correction method of the wireless transmission system and the associated circuit.

Background Art

With the rapid development of the communication system, the requirements of the transmission speed is also higher, in general, the more complex can usually be the modulation technology of the information data containing the more; in other words, can be a complex modulation processing to improve the transmission rate, such as 64 quadrature amplitude modulation (64-Quadrature   Modulation   Amplitude, 64-QAM), or even 256-QAM. Therefore, high-level quadrature amplitude modulation of the demand becomes more and more popular. If the desired high order quadrature amplitude modulation can have good receiving effect, must be correspondingly improving the communication system error vector amplitude value (  Magnitude   Vector Error, EVM), to influence the error vector of amplitude is one of the most important factors in the same phase imbalance between the quadrature phase (In-phase   Quadrature-phase   imbalance, IQ   imbalance) degree. IQ imbalance caused by the main reason for the it is a radio frequency (  Frequency Radio, RF) circuit in the non-matching of the IQ two paths, even slight deviation of the overall communication system will also be affected, not form complete orthogonal modulating/demodulating procedure, the receiving end so as to lead to bit error rate (  Rate   Error Bit, BER) increase. The deviation also can be divided into (phase) amplitude of the deviation of the phase deviation (amplitude), once these deviation exists, will produce the spectrum on a mirror Image of the symmetrical frequency interference. Please refer to the Figure 1, Figure 1 is a schematic diagram of a receiving end receives a received signal of the received signal and a mirror Image of the interference signal. Wherein the received signal with the amplitude of the amplitude of the Image interference signal is generally referred to as the difference between the Image than (  Ratio IMage, IMR), for example, when the IQ the serious imbalance, on small IMR, on the contrary is large.

Therefore, in order to improve the impact caused by the deviation of the, actual circuit is often before the formal transmitting and receiving signal, the movements of the first correction (calibration), called IQ correction. However, the communication system in different environments, various aspects of the different characteristic. For example, a radio frequency circuit in different temperature, different channel, different low-noise amplifier (  Amplifier Low-Noise, LNA) with different power amplifier (  Amplifier Power, Pa) under the condition of, will have different performance characteristics. Therefore, in the communication system, when the correcting IQ how the implementation and, in this area has become a very important subject.

Content of the invention

One of the purposes of this invention is to provide a kind of communication system the correction method of the associated circuit and, in particular to a quadrature modulation is used in the correction method of the wireless transmission system and to meet the above-mentioned the question associated circuit.

According to the 1st embodiment a of the invention, which provides a correction method of the communication system. This correction method comprises: a transmission terminal for generating a test signal; in the transmitting end is set at least one correction coefficient; from the transmitting end through the at least one correction coefficient to transmit the test signal to a receiving end; the receiving end of the test signal received by a frequency spectrum analysis, a spectrum analysis result to obtain; according to the frequency spectrum analysis result and to adjust the transmitting end of the at least one correction coefficient, in order to correct the transmitting end.

According to the invention of the embodiment of a 2nd, which provides a correction method of the communication system. This correction method comprises: a transmission terminal for generating a test signal; to the receiving end of the at least one correction coefficient set; from the transmitting end transmits the test signal to a receiving end, and through the at least one correction coefficient; to the receiving end of the test signal received by a frequency spectrum analysis, a spectrum analysis result to obtain; according to the frequency spectrum analysis result and to adjust the receiving end of the at least one correction coefficient, in order to correct the receiving end.

According to the 3rd embodiment a of the invention, which provides a correction device of the communication system. The correction device includes a transmitter, a test signal generation unit, a correction factor unit, and a receiving end of a spectrum analyzing unit. Wherein the test signal generation unit is the transmission end is used for generating a test signal. The correction factor unit is used in the transmitting end is set at least one correction coefficient, and on the basis of a frequency spectrum analysis result to adjust the transmitting end of the at least one correction coefficient. The receiving end system is coupled to the transmitting end. The spectrum analysis unit is used on the receiving end of the test signal received by a frequency spectrum analysis, the results of the analysis to obtain the spectrum.

According to the 4th embodiment a of the invention, which provides a correction device of the communication system. The correction device includes a transmitter, a test signal generating unit, a receiving end, a correction factor unit and a spectrum analyzing unit. Wherein the test signal generation unit is the transmission end is used for generating a test signal. The receiving end system is coupled to the receiving end. The correction factor unit used for the receiving end is set at least one correction coefficient, and on the basis of a frequency spectrum analysis result to adjust the receiving end of the at least one correction coefficient. The spectrum analysis unit is used on the receiving end of the test signal received by a frequency spectrum analysis, the results of the analysis to obtain the spectrum.

The invention of the proposed correction method and to the associated correction circuit in the communication system for transmission-end and the receiving end of the correction, respectively, in order to reduce the circuit does not match the impact. Furthermore, the invention of the proposed correction method and the associated correction device can be active at the temperature and under the condition of the channel change, in the communication system for transmission-end and the receiving end of the are respectively re-corrected, and the error rate of a receiving terminal is reduced in order to improve the effective transmission rate.

Description of drawings

Figure 1 is a schematic diagram of a receiving end receives a received signal of the received signal and a mirror Image of the interference signal.

Figure 2 is a schematic diagram of the present invention including a correcting device of a communication system of a 1st embodiment.

Figure 3 is flow chart of the communication system of this invention one embodiment of the correction method.

Figure 4 is flow chart of the power of the test signal of the present invention a regulating method of the embodiment.

Figure 5 is flowchart of correction coefficient of the present invention a regulating method of the embodiment.

Figure 6 is a schematic diagram of the present invention including a correcting device of a communication system of a 2nd embodiment.

Figure 7 is a schematic diagram of the present invention including a correcting device of a communication system of a 3rd embodiment.

Figure 8 is flow chart of the communication system the other correction method of one embodiment.

Figure 9 is flowchart of the present invention re-correction judging one embodiment of the method.

Figure 10 is flowchart of the present invention re-correction judging the other embodiment of the method.

Wherein the following is a description of marks on the attached drawing:

200,700: communication system

202,702: test signal generating unit

204,704: the correction factor unit

206: transmitter

208: self-mixing unit

210, 71: receiving end

212,712: frequency spectrum analysis unit

214,714: control unit

220,222: digital-to-analog converter

244,246,744, 746: analog-to-digital converter

224,226: fundamental frequency transmission circuit

228,230,748, 750: mixer

232,752: oscillator

236: power amplifier

740,742: fundamental frequency receiving circuit

756: low-noise amplifier

300-310,400-412,500-518,800-810,900-908, 1000-1006: step

Mode of execution

And follow-up the specification of Patent application range of some of the terminology used to refer to a particular element. In the field of holders usually should be understood, the manufacturer will use different terminology to refer to the same element. The specification and the subsequent Patent application range in order to distinguish the difference of the name of a mode of the component, rather than on the function as the difference of specific criteria. In the entire specification and the follow-up request entry, referred to as a "includes" open terminology, therefore, should be explains "includes, but is not defines in ". Furthermore, the term "coupled" in this series includes any direct and indirect electrical connection means. Therefore, if a described in the text device is coupled between a 1st 2nd device, on behalf of the device for the 1st may be electrically connected directly to the 2nd device, or through other device or connection means is connected electrically to the ground between the 2nd device.

Please refer to the Figure 2, Figure 2 is a schematic diagram of the present invention including a correcting device of a 1st embodiment of the communication system. Communication system 200 comprises a at least a portion of the electronic device (for example, a part or all of), and the electronic device comprises at least a transfer circuit and the at least one receiving circuit, and examples of the electronic device can include (but are not limited to): multi-function mobile phone, intelligent mobile phone, personal digital assistant (  Assistant   Digital Personal), personal computer (  Computer Personal) such as a laptop computer (Laptop) computer and the desktop (Desktop). For example: the communication system 200 can represent the the processing module in the electronic device, such as a processor. Also, for example, : communication system 200 can represent the whole of the electronic device. However, this is in order to illustrate the use of the only, and not limiting of the present invention, in fact, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention. According to this embodiment a change of example, communication system 200 can represent and include a system of the electronic device, the electronic device is a subsystem of the system. In particular, the electronic device can be to include quadrature amplitude modulation circuit (  Modulation   Amplitude Quadrature, QAM) of the electronic device, wherein the communication system 200 can be directed against the above-mentioned orthogonal amplitude modulation circuit to carry out correction; the invention is not, however, limited to this.

As shown in Figure 2, communication system 200 comprises: a test signal generating unit 202, a correction factor unit 204, a transfer end 206, a self-mixing unit (self-mixer)208, a receiving end 210, a spectrum analyzing unit 212 and a control unit 214. According to this embodiment, communication system 200 each time after the re-start (such as after the power up reset or the system), and in general to data before the receiving mode, in order to improve transmission-end 206 with a transmission terminal of the phase path (in other words a transmitter 206 in a digital-to-analog converter 220, a fundamental transfer circuit 224 and a mixer 228 path) and a transmission correct AC phase path (in other words a transmitter 206 in a digital-to-analog converter 222, a fundamental transmission circuit 226 and a mixer 228 & 230 path) between the non-matching of the characteristics of the circuits, the control unit 214 will first control communications system 200 to enter a correction mode; in other words, the correction mode will for transmission end 206 of the transmission end of the transmission path with the same phase correct AC phase path is optimal for the difference between the correction, and then the receiving end 210 a similar correction, will be to the transmitting end 206 and the receiving end 210 into the general data receiving mode to begin their official data receiving. However, this is in order to illustrate the use of the only, and not limiting of the present invention, in fact, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention.

The mixer under an ideal state 228 is the fundamental transfer circuit 224 the transmitted signal and the oscillator 232 to a specific frequency of cos (ω_c t) operation, and in the actual following error in the circuit, we can use this same phase all of the error integration in the path to a common amplitude error and with a total phase error, and coupled with a common amplitude error coefficient α_i and to a common phase error coefficient Δ_i later, the above-mentioned's procedures can be rewritten to α_i sin (ω_c t+Δ_i), wherein the common amplitude error coefficient α_i the common phase error coefficient and Δ_i i of the lower header in the representative of the phase path is the same. Similarly, the mixer under an ideal state 230 is the fundamental transmitting circuit 226 the transmitted signal and the oscillator 232 to a specific frequency of sin (ω_c t) operation, and in the actual error in the circuit, we can be in the quadrature-phase path all of the error integration is a common amplitude error and with a total phase error, and coupled with a common amplitude error coefficient α_q and to a common phase error coefficient Δ_q later, the above-mentioned's procedures can be rewritten to α_q sin (ω_c t+Δ_q), wherein the common amplitude error coefficient α_q the common phase error coefficient and Δ_q in subscript_q is represented by the orthogonal phase path. Next, in order to simplify the complexity of the correction of the operation time, we can further the same phase of the quadrature-phase path path and their respective error coefficient dization, in other words, since in this embodiment the correction procedure in the first path is directed to the same phase of the quadrature-phase path and to improve the deviation of the, we will therefore mixer mixer 228 and 230 are respectively representative of the simplified to read αcos (ω ct+Δ) sin (ωct), in this way, the need for only two coefficient of the adjustment of the most optimized. However, this is in order to illustrate the use of the only, and not limiting of the present invention, in fact, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention. Next, with regard to the correction mode of the detailed operation will be described as follows.

Section 3 of the present invention is the correction method of the communication system 300 of one embodiment of the flow chart. The same can be achieved if the result of the whole, does not necessarily need to be in accordance with section 3 as shown in the process of to carry out the sequence of steps, and the section 3 of the steps shown are not necessarily to be carried out continuously, that is, which can also be inserted into other steps. Furthermore, section 3 in the implementation of certain steps can be designed according to different demand of example or is omitted. Correction method 300 can be applied to the section 2 as shown the communication system 200, wherein the test signal generation unit 202, the correction factor unit 204, spectrum analyzing unit 212 and control unit 214 can be through utilizing the correction method 300 to the transmitting end 206 can be corrected. Correction method 300 are as follows:

In the step 302 in, communication system 200 in the control unit 214 will control the test signal generation unit 202 to produce a test signal to the correction factor unit 204, for example, the test signal can be a continuous and fixed specific value, or the continuous and fixed value through the specific coding the coded signal produced by the, however, is to illustrate the use of only, and not limiting of the present invention. Furthermore, the test signal generation unit 202 can be used to realize the pure hardware circuit, or also the program code executed by the processor, in fact, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention.

In step 304 in, communication system 200 will have a built-in of the other correction factor unit 204, the correction factor unit 204 will set at least one correction coefficient, for example, in this embodiment, the correction factor unit 204 contains two correction coefficient, is connected with a 2nd 1st coefficient of the coefficient X and a Y, such as section 2 as shown, 1st coefficient X is used to correct the in-phase signal path, and 2nd coefficient Y is used to correct the quadrature-phase signal path, however, is to illustrate the use of only, and not limiting of the present invention, in fact, can also use more than two or more correction coefficient, the complexity of the corresponding however its accuracy and may also be affected. It should be noted that, the initial value of the coefficient X 1st can be set to 1, Y 2nd coefficient can be set as the initial value of 0, in other words, in the ideal state, shall the 1st coefficient X of 1, and shall the 2nd coefficient Y of 0. Related decision method and the optimum value of the details will be described in subsequent paragraphs.

In step 306 in, step 302 will be a test signal in the test signal generation unit 202 sends out, and after the correction factor unit 204 of the at least one correction coefficient, re-transmission is sent to a communication system 200 in the transmitting end 206 and a feedback back to the communication system 200 itself receiving end 210, so as to obtain a received test signal, and according to the received test signal to decide how to correct communication system 200. The associated feedback mode and the details will be described in subsequent paragraphs.

In step 308 in, by frequency spectrum analyzing unit 212 to the receiving end 210 of the received output by a spectral analysis of the test signal, a frequency spectrum analysis result and, in this embodiment, the frequency spectrum analysis result is a power spectral density (  Density   Spectrum Power, PSD), however, the use of this only in order to clarify, and not limiting of the present invention, in fact, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention.

In step 310 in, by frequency spectrum analyzing unit 212 from the frequency spectrum analysis result to adjust the transfer end 206 of the at least one correction coefficient, in order to correct the transmission-end 206. For example, in this embodiment, by frequency spectrum analyzing unit 212 from the power spectral density to calculate as shown in Figure 1 than the Image in the (  Ratio IMage, IMR), and, accordingly to adjust the correction factor unit 204 in the X and 2nd 1st coefficient corresponding to the coefficient adjustment of Y made, and at the same time observing the Image ratio by the adjustment of the next decision, as a recurrence adjustment loop, will therefore constantly adjust coefficient 1st 2nd coefficient X and/or Y, until the control unit 214 judges the correction has been completed, will stop the correction mode and allow the communication system 200 into the normal data receiving mode.

According to this embodiment, the test signal generation unit 202 of the test signal generated by the same will be respectively enter into and phase path of the quadrature-phase path, and respectively through the digital-to-analog converter 220 and digital-to-analog converter 222 later, and then respectively through the fundamental frequency circuit 224 and the fundamental frequency circuit 226 processing, then through a mixer, the mixer 228 and 230 to the frequency of the above contained in a high-frequency carrier, two path to send the signal transmitting end 206. Because the implementation of the disclosed burners for transmission end 206 carrying out correction, therefore in order to make the correction of the flow is more simply, the test signal is fed back to the spectrum analysis unit 212 of the time, will be deliberately skip the receiving end 210 of the modulation circuit (not shown in the section 2 in the Figure), the main reason is that the receiving end 210 of the modulation circuit in the error of the one of the main sources of; the invention, in order to avoid the end 206 and the receiving end 210 of the confusion each other, will by the skip the receiving end 210 of the modulation circuit in the transmitting end to concentrate on correct 206, however, the use of this only in order to clarify, and not limiting of the present invention, in fact, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention. Therefore, in order to be able to the end 206 of the generated radio frequency signal is then sent to the receiving end 210 of the fundamental frequency circuit 240 and the fundamental frequency circuit 242 in, through self-mixing unit 208 to the radio frequency signal into a baseband signal, and bypass (bypass) the receiving end 210 of the modulation circuit in.

Based on the above description of the embodiment of, communication system 200 in each of the re-start (such as after the power up reset or the system), and in general of the formal prior to the start of data receiving mode, in order to improve transmission-end 206 and of the same phase of the quadrature-phase path of the route, the control unit 214 will first control communications system 200 to enter the calibration mode. In fact, the correction mode and can be further divided into two stages, in the 1st stage, the control unit 214 will control the test signal generation unit 202 generates the test signal, and according to the spectrum analysis unit 212 the power of the received signal, to decide whether it is necessary to strengthen or weaken the test signal, its purpose is to in order to adjust the size of the of the test signal to a proper range, in order to facilitate the follow-up of the correction operation of the 2nd stage. Please refer to the Figure 4, Figure 4 is to carry out steps in sequence, the picture of the invention the test signal power adjustment method 400 flow chart of one embodiment of, the same can be achieved if the result of the whole, does not necessarily need to be in accordance with Figure 4 in the process of the 4 a certain step is not shown to be continuous, that is, which can also be inserted into other steps. Furthermore, Figure 4 some of the steps in the implementation can be made according to different design requirements example or omitted. The test signal power adjustment method 400 can be applied to Figure 2 shown in the communication system 200, in particular to Figure 2 the control unit 214. The test signal power adjustment method 400 are as follows.

In step 402 in, in the communication system 200 has just begun to enter the calibration mode, according to the spectrum analysis result to adjust the transmitting end 206 of the at least one correction coefficient (for example, the coefficient X and 2nd 1st coefficient Y) before, the control unit 214 will first will be the correction factor unit 204 the coefficient of the coefficient X and 2nd 1st Y reset to the preset initial setting under, that is, the coefficient of the coefficient X and 2nd 1st Y are respectively set to be 1 and 0, and notify the transmitting end 206 of the test signal generation unit 202 for transmitting the test signal. Next, step 404 will make reference to the results of the analysis of the spectrum, if the spectrum analysis results show that the test signal is less than a predetermined power, notify the transmitting end 206 of the test signal generation unit 202 to a particular stride as the unit (step) for increasing the power of the test signal; on the contrary, according to the frequency spectrum analysis result, if the spectrum analysis results show that the test signal is not less than a predetermined power, indicates that the test signal has already reached a certain substantially large and small degree of. Next in step 408 in, will in addition according to the spectral analysis result of the test signal to judge whether or not the harmonic of excessive at the same time, if the test signal has any harmonic power is greater than or equal to the background noise, then the control unit 214 will notify transmitting end 206 of the test signal generation unit 202 to a particular stride as the unit to reduce the power of the test signal, in order to achieve the purpose of suppressing harmonic, so as not to affect the correction accuracy of the follow-up; on the contrary, if it is the test signal without any harmonic power is greater than or equal to the background noise, will enter step 412, the control unit 214 will notify transmitting end 206 of the test signal generation unit 202 can be fixed to at the moment the size of the power of the test signal.

Because the correction mode is divided into two stages, after the end of the 1st stage, will enter the 2nd stage. In the 2nd stage, the control unit 214 according to the 1st stage will be determined by the size of the test signal to control the power of the test signal generation unit 202 generates the test signal, and according to the spectrum analysis unit 212 the power magnitude of the signal received to determine whether to adjust the correction factor unit 204 in the coefficient of the coefficient X and 2nd 1st Y, in this embodiment, is the coefficient of the coefficient X and 2nd 1st Y separately adjusted, that is, in the 2nd stage, will first adjust the 1st 2nd coefficient of the coefficient X and Y does not change, and the coefficient X after 1st, for the coefficient X unchanged under 1st, the 2nd coefficient Y is adjusted, however, the use of this only in order to clarify, and not limiting of the present invention, in addition, including any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, the scope of rights of the present invention. Please refer to the fig. 5, to carry out steps in sequence Figure 5 is, and the map of the correction of the invention is the adjustment factor method 500 of one embodiment of the flow chart, the same can be achieved if the result of the whole, does not necessarily need to be in accordance with Figure 5 shown in the process of 5 the steps shown are not necessarily to be carried out continuously, that is, which can also be inserted into other steps. Furthermore, Figure 5 some of the steps in the implementation can be made according to different design requirements example or omitted. Correction coefficient adjusting method 500 can be applied to Figure 2 shown in the communication system 200, in particular to Figure 2 the control unit 214. Method for adjusting the correction coefficients 500 are as follows.

In step 502 in, in the communication system 200 just entering the calibration mode when the 2nd stage, the control unit 214 will first will be the correction factor unit 204 the coefficient of the coefficient X and 2nd 1st Y reset to the preset initial setting under, that is, the coefficient of the coefficient X and 2nd 1st Y are respectively set to be 1 and 0, and notify the transmitting end 206 of the test signal generation unit 202 according to 1st stage decided by the power of the test signal to produce the test signal. Next, in step 504 in, according to the frequency spectrum analysis result, an initial Image signal power and recording-down, and setting and a return ring N= 1 and an adjusting direction number D_N = 1. In the step 506 in, in order to a particular stride as the unit for increasing the coefficient of 1st, it should be noted that, in the step 502 and step 504 in, in an initial state because, the arbitrary first selecting one of the direction to adjust the 1st coefficient X, however, this only in order to illustrate use, and not limiting of the present invention, in addition, including any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention. For example, also can be in the step 502 is set in the direction of adjustment D_N = 0, and in the step 504 in order to the particular stride for the units to reduce 1st coefficient X.

In step 508 in, frequency spectrum analyzing unit 212 will be the mirror Image signal power (its corresponding to the previous step to the 1st coefficient X of the adjustment), if the Image signal power larger than the step 504 of the power of the original Image signal, from the very beginning that the direction of the arbitrary selection by D_N is wrong direction, if it is to continue adjustment to this direction, will be such that the initial Image signal power increasingly large, therefore, will enter step 510, thus, control unit 214 to the next correction coefficient adjusting direction reverse, in other words D_N+1 =-D_N, in order to obtain the correct correction coefficient. On the other hand, if the Image signal power is not greater than the step 504 of the power of the original Image signal, from the very beginning that the direction of the arbitrary selection by D_N is the correct direction, follow-up will continue to be adjusted to this direction, will be such that the initial Image signal power increasingly small, therefore, will enter step 512 to continue in the same direction and to adjust the 1st coefficient X, in other words D_N+1 = D_N, in order to obtain the correct correction coefficient. Furthermore, it is also necessary to update the initial mirror Image signal power for the current to the estimated power of the Image signal, in order to compare the next loop to continue.

Either step 510 or step 512, then will proceed to step 514. In step 514 in, check the previous step will be determined by the direction of the next adjustment D_N+1 adjusting direction with the D_N is the same, if it is the same, will enter step 516 to set the loop number N=N + 1, and then returning to step 508 the next loop adjustment; on the contrary, if it is the next adjustment direction D_N+1 adjusting direction with the D_N not the same, the two possible that, one represents the initial arbitrary adjustment of the direction selection error, then the control unit 214 will still enter step 516 N=N + 1 set loop number, and then returning to step 508 the next loop adjustment; and the second is for the 1st 2nd stage representative of the adjustment of the coefficients has been completed, that is, minimize the value falls in of the Image signal power of the loop between the last time, in other words, optimization of fall 1st coefficient X value of this time and the previous loop the set between the two values. Then proceed to step 518 to put an end to the 2nd stage of the correction. In the 1st stage 2nd coefficient X after the adjustment, can be fixed 1st coefficient X, in order to again adjust the similar 2nd coefficient Y (to Figure 5 in the step 506,512 the 1st coefficient changed to 2nd coefficient, via the above-mentioned the same program, can be obtained the most optimized 2nd coefficient Y), is similar to the I will not repeat.

Because the integrated circuit internal circuit characteristic or different levels of design of the power amplifier is method is different, the same will also affect the phase path and the quadrature-phase path between the non-matching of the characteristics of the circuits, in particular in in many communication system transmitting end will dispose a plurality of different power amplifier for switching or in arbitrary combination. Therefore, the invention proposes another one embodiment, this embodiment can let a plurality of power amplifiers to correction in order to get more complete conveying the end correction coefficient. Please refer to the Figure 6, Figure 6 is a schematic diagram of the present invention including a correcting device of a communication system of a 2nd embodiment. Communication system 600 generally and Figure 2 of the communication system 200 is the same, and the main difference lies in the power amplifier 236. In the correction mode, communication system 600 the test signal generation unit 202 a test signal generated by the phase path respectively and together with an orthogonal phase path, and respectively through the digital-to-analog converter 220 and digital-to-analog converter 222 later, and then respectively through the fundamental frequency circuit 224 and the fundamental frequency circuit 226 processing, then through a mixer, the mixer 228 and 230 to its frequency in a high-frequency carrier above set out, then the combined signal of the two paths, and the above-mentioned embodiment is different, in the sending-transmitting end 206 before, also passes through the power amplifier 236. Subsequent signal processing is the same as and the above-mentioned embodiment, in other words a self-mixing unit 208, the receiving end 210, the last to enter the frequency spectrum analyzing unit 212 and control unit 214 in. This embodiment can make the communication system 600 in the correction mode, in the use of different power amplifier to correct the situation, in order to get a plurality of sets of corresponding correction coefficient, to be communication system 600 into the normal data receiving mode, be transferred according to the size of the energy of the power amplifier to select the correction coefficient corresponding to, either alone a specific power amplifier or a combination of the power amplifier of the above, can be used for the correction mode of the correction coefficient obtained by directly corresponding to or combination coincides with the best correction coefficient. Furthermore, this embodiment and the aforesaid embodiment is/changing an example similar to I will not repeat.

Please refer to the Figure 7, Figure 7 is a schematic diagram of the present invention including a correcting device of a communication system of a 3rd embodiment. As shown in Figure 7, a communication system 700 includes a test signal generation unit 702, and the aforesaid embodiment is the same as the correction factor unit of the transmitting end 204 and 206, a receiving end 710, a spectrum analysis unit 712 and a control unit 714. According to this embodiment, communication system 700 after each time the re-start (such as after the power up reset or the system), and in general of the formal prior to the start of data receiving mode, will first jump over/bypass receiving end 710 in a low-noise amplifier 756, mixer mixer 748 and 750, to the transmitting end 206 to the transmitting end of the calibration procedure, the transmitting end 206 of the correction coefficient (for example 1st coefficient X and 2nd coefficient Y) after determining, also need to further improve the receiving end 706 with a receiving end of the phase path (in other words a receiving end 710 of a low-noise amplifier 756, a mixer 748, a basic frequency receiving circuit 740 and an analog-to-digital converter 744 path) and a receiving the correct AC phase path (in other words a receiving end 706 of a low-noise amplifier 756, a mixer 750, a basic frequency receiving circuit 742 and an analog-to-digital converter 746 path) does not match between the characteristics of the circuits, so the control unit 714 will first control communications system 700 continue to remain in the correction mode; in other words, the correction mode at the conclusion of the transmission-end 206 after the correction, will then against the receiving end 706 of the receiving end receives the same phase with the route correcting the difference between the AC phase path to continue to carry on the optimization correction, will allow only after transmitting end 206 and receiving end 710 begin their official data receiving. However, the use of this only in order to clarify, and not limiting of the present invention, in fact, also can be used for calibration mode only in the transmitting end and the receiving end of one of the correction, in addition, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention.

In this embodiment, and the same as the aforesaid embodiment, we will the receiving end receives the same phase with the path AC phase path correcting the mismatch between the mixer respectively concentrated mixer 748 and 750, and in the actual following error in the circuit, we can use this same phase all of the error integration in the path to a common amplitude error and with a total phase error, and further the same phase of the quadrature-phase path path and their respective error coefficient dization to read αcos (ω ct+Δ) and sin (ωct), in this way, the need for only two coefficient (i.e. 1st coefficient X 'and 2nd coefficient Y') the adjustment of the most optimized. However, the use of this only in order to clarify, and not limiting of the present invention, in fact, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention. Next, with regard to the correction mode of the detailed operation will be described as follows.

Figure 8 is flow chart of the correction method of the communication system 800 of one embodiment. The same can be achieved if the result of the whole, does not necessarily need to be in accordance with Figure 8 shown in the sequence of steps in the process to carry out, and Figure 8 a certain step is not shown to be continuous, that is, which can also be inserted into other steps. Furthermore, Figure 8 in different some of the steps can be implemented according to the design requirements example or. Correction method 800 can be applied to Figure 7 the communication system shown in 700, wherein the test signal generation unit 702, the correction factor unit 704, the frequency spectrum analysis unit control unit 712 and 714 can be through utilizing the correction method 800 to the receiving end 710 to carry out correction. Correction method 800 are as follows.

In the step 802 in, communication system 700 control unit 714 will control the test signal generation unit 702 to generate a test signal to the correction factor unit 704, for example, the test signal can be a continuous and fixed specific value, or the continuous and fixed value through the specific coding the coded signal produced by the, however, the use of this only in order to clarify, and not limiting of the present invention. Furthermore, the test signal generation unit 702 can be used to realize the pure hardware circuit, or also the program code executed by the processor, in fact, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention.

In steps 804 in, communication system 700 will have a built-in of the other correction factor unit 712, the correction factor unit 704 specialized is used for correcting the receiving end 710, the correction factor unit 704 will set at least one correction coefficient, for example, in this embodiment, the correction factor unit 704 contains two correction coefficient, is connected with a 1st coefficient X 'a and 2nd coefficient Y' , as shown in Figure 7, 1st coefficient X 'is used for correcting the in-phase signal path, and 2nd coefficient Y' is used for correcting the quadrature-phase signal path, however, the use of this only in order to clarify, and not limiting of the present invention, in fact, can also use more than two or more correction coefficient, the complexity of the corresponding however its accuracy and may also be affected. It should be noted that, the coefficient 1st X 'can be set as the initial value of 1, 2nd coefficient Y' can be set as the initial value of 0, in other words, in the ideal state, 1st coefficient X 'shall of to 1, and the 2nd coefficient Y' shall of the 0. Related decision method and the optimum value of the details will be described in subsequent paragraphs.

In step 806 in, step 802 in the will of the test signal from the test signal generation unit 702 sends out, and through the communication system 700 transmitting end in 206 and a feedback back to the communication system 700 of its own receiving end 710, and then via the correction factor unit 704 of the at least one correction coefficient to obtain a received test signal, and according to the received test signal to decide how to correct communication system 700. The associated feedback mode and the details will be described in subsequent paragraphs.

In step 808 in, using spectral analysis unit 712 to the receiving end 710 of the received output by a spectral analysis of the test signal, a frequency spectrum analysis result and, in this embodiment, the frequency spectrum analysis result is a power spectral density (  Density   Spectrum Power, PSD), however, the use of this only in order to clarify, and not limiting of the present invention, in fact, any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention.

For step 810 in, by frequency spectrum analyzing unit 712 from the frequency spectrum analysis result to adjust the receiving end 710 of the at least one correction coefficient, in order to correct the receiving end 710. For example, in this embodiment, by frequency spectrum analyzing unit 712 from the power spectral density, to calculate the Figure 1 than the Image in the (  Ratio IMage, IMR), and, accordingly to adjust the correction factor unit 704 in 1st coefficient of X 'and 2nd coefficient Y' corresponding to the adjustment made, and at the same time observing the Image ratio by the adjustment of the next decision, as a recurrence adjustment loop, thus 1st coefficient X 'and 2nd coefficient Y' adjusted constantly, until the control unit 714 judging correction has been completed, will stop the correction mode and allow the communication system 700 into the normal data receiving mode.

According to this embodiment, the test signal generation unit 702 of the test signal generated by the correction factor unit the transmitting end 204 and 206, and enter the receiving end, by coupling 710, however, the use of this only in order to clarify, and not limiting of the present invention, in fact, can also be directly to a power amplifier 236 is coupled to the input end of the low-noise amplifier 756 the output end, or to a power amplifier 236 is coupled to the output end of the low-noise amplifier 756 of the input end, including any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention. Because the power amplifier 236 is greater than the output power of the transmitter 206 in other all of the signal, therefore, at the receiving end 710 of the coupled signal from the power amplifier 236 the output of the test signal, the test signal output by the receiving end of the via 710 mixer mixer 748 and 750 to down, in and taken out from the high-frequency carrier of the, and respectively after the fundamental frequency circuit 740 and the fundamental frequency circuit 742 after the treatment, and then respectively through the analog-to-digital converter the analog-to-digital converter 744 and 746, the final re-enter the correction factor unit 704 and spectrum analysis unit 712. Furthermore, this embodiment is for the 1st coefficient X 'and 2nd coefficient Y' respectively of the adjusting method, or for the low noise amplifier 756 in a plurality of groups of low-noise amplification unit individual correction mode of the aforesaid embodiment are the similar/changing example, in that it will not repeat repeat.

According to the aforesaid embodiment, each time the communication system after the re-start (such as power or the system re-delayed after) correction of the communication system will be carried out, and then will start formal data receiving. However, the integrated circuit may also be as the change of the temperature caused by the change of the electrical characteristic, if the temperature change of the difference is too large, because it is extremely likely that the equivalent of the circuit does not match the change in the bit error rate, therefore, according to another embodiment of the present invention, proposes a kind of instant re-corrected to judge the mechanism. Please refer to the Figure 9, Figure 9 is flowchart of the present invention re-correction judging method 900 of one embodiment. The same can be achieved if the result of the whole, does not necessarily need to be in accordance with subsection 9 as shown in the process of to carry out the sequence of steps, and Figure 9 a certain step is not shown to be continuous, that is, which can also be inserted into other steps. Furthermore, Figure 9 in different some of the steps can be implemented according to the design requirements example or. Re-correction judging method 900 can be applied to the Figure 2, Figure 6 or Figure 7 of the communication system shown in 200,600,700 in. Re-correction judging method 900 are as follows:

In step 902 in, communication system re-starting, and enter step 904 as in correcting the mode of the above-mentioned embodiment of the correcting process, in the communication system at the same time a particular unit will record the current chip temperature is a preset temperature, for example, in the communication system a control unit will record the current chip temperature is the preset temperature. After the completion of correction in the communication system, then enter step 906, that is, communication system begins receiving formal data, at this moment in the communication system will examine the control unit of the current temperature and the preset temperature is greater than a gap between the predetermined temperature difference, if the current temperature and the preset temperature is not greater than the gap between the predetermined temperature difference, then enter the step 908, after a specific time, and then returning to step 906. For example, the specific time can be 5 minutes, and the predetermined temperature difference may be at 5 degrees, in other words, in the communication system of the control unit every 5 minutes will check the current chip temperature, if is the current recording before the chip temperature and the preset temperature is greater than the gap between the above 5 degrees, will enter step 904, re-correction of the communication system. However, the use of this only in order to clarify, and not limiting of the present invention, in fact any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention.

According to the aforesaid embodiment, each time the communication system after the re-start (such as power or the system re-delayed after) correction of the communication system will be carried out, and then will start formal data receiving. However, the communication system is also likely to change with the environment caused by the change of the channel, and then in the communication system of the power amplifier or a low noise amplifier active gain switching, therefore, it is very likely that will be the equivalent of the circuit does not match the change in the bit error rate, therefore, according to another embodiment of the present invention, another kind of instant re-corrected to judge the mechanism. Please refer to the Figure 10, Figure 10 is flowchart of according to the invention re-correction judging method 1000 of one embodiment. The same can be achieved if the result of the whole, does not necessarily need to be in accordance with Figure 10 is shown the sequence of steps in the process of to, and Figure 10 shows the steps do not necessarily have to continuously carry out, that is, which can also be inserted into other steps. Furthermore, fig. 10 some of the steps in the implementation can be made according to different design requirements example or of the omitted. Re-correction judging method 1000 can be applied to the Figure 2, Figure 6 or Figure 7 of the communication system shown in 200,600,700 in. Re-correction judging method 1000 are as follows:

In step 1002 in, communication system re-starting, and in the step 1004 is carried out in the correction mode as the above-mentioned embodiment of the correction process. After the completion of correction in the communication system, then enter step 1006, that is, communication system begins receiving formal data, at this moment in a communication system a control unit will check the current status of their change the channel happens, for example, a user can through a manual adjustment mode to change the channel of the communication system, when the communication system of the control unit in the received notice of the channel change, will be executing step 1004, the correcting of re-communication system, otherwise keep in step 1006. In another example, the communication system will automatically through the automatic adjustment mode to change the channel of the communication system, when the communication system of the control unit in the received notice of the channel change, will be executing step 1004, the correcting of re-communication system, otherwise keep in step 1006. However, this is in order to illustrate the use of the only, and not limiting of the present invention, in fact any can reach the design of the same or similar function, and according to the present invention other changes in the spirit of the invention, all belong to the scope of this invention.

The stated above is a preferable embodiment of the present invention, where the scope of the Patent application in accordance with this invention are of such change and modification, should belong to the scope of this invention.