Character disc for transmitting

The character dialing unit for communication equipment such as telephone, exchanger, fax and communication set features that a single-chip computer is used for character code dialing other than numeral dialing. Said character code contains 1-3 characters associated with receiving person, for example, phonetic letters or English letters of name.

Method for transmitting diversity in orthogonal multiple carrier wave system

Self-adaptive illumination system based on visible light communication receiver

The invention provides a self-adaptive illumination system based on a visible light communication receiver. An optical receiver of a visible light communication system is used for receiving data and meanwhile used for detecting illumination effect, the detection data can be transmitted to an illumination lamp through an optical transmitter of the visible light communication system or other communication transmitters, and the illumination lamp adjusts the light source output power according to the detection data and enables the light source output power to achieve the standard set by a light using position, so that the illumination effect can be dynamically stabilized under the condition that the illumination conditions and the environmental temperature are changed. Meanwhile, the illumination lamp also can be taken as the optical transmitter of the visible light communication system, which is used for transmitting data.

Visible light space division multiple access multichannel communication system

The invention relates to a realization proposal of a visible light space division multi-access multi-channel communication system. A visible light LED array at a sending end sends multiple channels of coded light signals, a light receiver forms the space separated LED image spots on a planar array photodetector by an imaging optical system thereof, the different receivers select their own outputsaccording to the different positions of image spots and the different response signals of the image elements which are covered by the image spots, thereby realizing the tracking of light spots duringthe space diversity and the movement.

Pulse and OFDMD double-data modulation method

The invention discloses a double-data modulation method of pulse and OFDM. An optical spectrum of a single chip white light LED is formed by exciting fluorescent powder of yellow color or red-green color and the like by a blue light, and the shape of the whole optical spectrum has two relative independent peak values, wherein the responding speed of the blue light is higher than that of a warm color light. The invention can be used for transmitting data by pulse modulation of the blue light and can be used as a carrier wave for the warm color light OFDM modulation, thus a double channel high-speed data transmission is realized. In addition, the blue light can be used as a reference simultaneously for OFDM symbol synchronization, direct current offset estimation and channel estimation.

Jam eliminating method of visible light communication system

The invention proposes an interference cancellation method of a visible light communication system. The visible light communication is most vulnerable to be interfered by the environmental light, the invention adopts an optical space division method to separate an interference source and a communication light source on a photoelectric sensor, then a background interference value is obtained by using the time-related sampling and the space-related sampling, after that, the background interference value is subtracted from the output of the data signal according to the function weight, so as to offset the impact of the background light.

Signal output method of light receiver area array sensor

The invention provides a signal output method of an optical receiver area array sensor, wherein the receiver firstly identifies and responds pixel positions of useful optical signals according to space and time characters of a light source, then selectively outputs the pixel signals and removes the pixel output only responding environment light. Meanwhile, the invention introduces a synchronous sampling technology for synchronizing the output sampling of the area array sensor and the frequency of light pulse and ensuring the integrity of signals during high speed communication.

Abamectin producing bacterium and preparation method thereof

The invention discloses abamectin producing bacterium and a preparation method thereof. The collection name of the bacterium is FT26-9 and the collection number of the bacterium is CGMCC No.4341. The bacterium was collected on November 12th, 2010. The preparation method comprises: performing ultraviolet and lithium chloride combined mutation induction treatment of a starting strain; screening an induced-mutation strain; performing mutation induction by nitrosoguanidine and screening; performing mutation induction by diethyl sulfate and screening; performing mutation induction by hydroxylamine and screening; performing mutation induction by 5-bromouracil and ultraviolet and screening; and finally obtaining the FT26-9 strain which can greatly improve the abamectin B component content in a fermentation product and reduce the abamectin A component content in the fermentation product. When the bacterium is used in industrial production of abamectin, the fermentation unit is improved by about ...

Optical communication receiving device capable of tracking signal movement

The invention provides a mobile tracking method of an output signal of an area array photoelectrical sensor. An optical receiver consisting of an imaging optical system and the area array photoelectrical sensor has the problem of selecting output pixel. When transceivers have relative movement, the pixel position responding communication light will change as well. At the time, track switch is required to avoid the interruption of communications. The invention selects a track positioning pixel and a data output pixel at the same time, monitors and calculates the output change thereof, and estimates the movement of the imaging facular of a communication light source, thus realizing the track of the data output pixel in the process of movement.

Interactive projecting display system with laser remote controller

The interactive projected display system with laser remote controller mainly includes computer, projector, display screen, laser indicator, camera head laser detector and signal processing unit, the computer is connected with projector, also respectively connected with signal processing unit, the signal processing unit is connected with camera head, also respectively connected with laser detector, and the visible light beam of laser indicator is projected on the display screen.

Abamectin producing bacterium and preparation method thereof

The invention discloses abamectin producing bacterium and a preparation method thereof. The collection name of the bacterium is FT26-9 and the collection number of the bacterium is CGMCC No.4341. The bacterium was collected on November 12th, 2010. The preparation method comprises: performing ultraviolet and lithium chloride combined mutation induction treatment of a starting strain; screening an induced-mutation strain; performing mutation induction by nitrosoguanidine and screening; performing mutation induction by diethyl sulfate and screening; performing mutation induction by hydroxylamineand screening; performing mutation induction by 5-bromouracil and ultraviolet and screening; and finally obtaining the FT26-9 strain which can greatly improve the abamectin B component content in a fermentation product and reduce the abamectin A component content in the fermentation product. When the bacterium is used in industrial production of abamectin, the fermentation unit is improved by about ...

Vehicle distance measurement method based on visible light communication

The invention provides a vehicle interval measurement method based on visible-light communication. Vehicle interval measurement is a basic function needed in an intelligent transportation system. The method adopts the visible-light communication and an image processing method to measure interval between vehicles. A pair of LED tail lights of a front vehicle transmits a modulation optical signal comprising an identity mark, the width of a vehicle body, the interval between the tail lights and other information backwards; a back vehicle utilizes an area-array photoelectric sensor to acquire an image of the front vehicle and receives the optical signal transmitted by the front vehicle; and the interval, relative velocity and relative position between two vehicles are calculated according to extracted communication information and the positions of two vehicle lights in the image.

Vehicle collision warning system based on optical communication

The invention relates to a vehicle collision warning system based on optical communication, which comprises optical indicators and optical detectors and is used for the safety monitoring and the information interaction among running vehicles. The optical indicators are distributed around or on the top of a vehicle and can transmit modulated optical signals in different directions, wherein the optical signals carry the angle indication information, mounting position information and other information of the vehicle which are corresponding to the optical signals, thereby forming optical antennae. The optical detectors mounted on another vehicle can detect optical pulse signals transmitted by a certain light emitting diode (LED) of the optical indicators and then extract the carried indication angle information, mounting position information and the like; and a processing unit of the optical detector analyzes and processes the information, estimates whether an abnormal running state exists ...

Personal communication system based on radio local net and/or blueteeth network

Personal communication system based on WLAN and/or Bluetooth includes hand held type mobile terminal possessing function of WLAN and/or Bluetooth, WLAN and/or Blueteeth local network composed of the said hand held type mobile terminals and other digital terminals possessing function of WLAN and/or Blueteeth, POTS telephone, synthesized wireless access devices at user side, DSLAM and PSTN network, and other data network. Hand held type mobile terminal through air interface is connected to the synthesized wireless access devices. POTS through twisted-pair is connected to synthesized wireless access devices, which through twisted-pair is connected DSLAM device. DSLAM device is connected to local commutator and data network. Simplifying complexity of technique fully, the invention is built based on present infrastructure, and takes full advantage of potential of PSTN network.

Visible light communication system adopting interference cancellation technology

The invention proposes an interference cancellation method of a visible light communication system. The visible light communication is most vulnerable to be interfered by the environmental light, the invention adopts an optical space division method to separate an interference source and a communication light source on a photoelectric sensor, then a background interference value is obtained by using the time-related sampling and the space-related sampling, after that, the background interference value is subtracted from the output of the data signal according to the function weight, so as to offset the impact of the background light.

Mobile tracking method for face array photoelectric sensor output signals

Vehicle distance measurement method based on visible light communication

The invention provides a vehicle interval measurement method based on visible-light communication. Vehicle interval measurement is a basic function needed in an intelligent transportation system. The method adopts the visible-light communication and an image processing method to measure interval between vehicles. A pair of LED tail lights of a front vehicle transmits a modulation optical signal comprising an identity mark, the width of a vehicle body, the interval between the tail lights and other information backwards; a back vehicle utilizes an area-array photoelectric sensor to acquire an image of the front vehicle and receives the optical signal transmitted by the front vehicle; and the interval, relative velocity and relative position between two vehicles are calculated according to extracted communication information and the positions of two vehicle lights in the image.

Visible light space division multiple access multichannel communication system

The invention relates to a realization proposal of a visible light space division multi-access multi-channel communication system. A visible light LED array at a sending end sends multiple channels of coded light signals, a light receiver forms the space separated LED image spots on a planar array photodetector by an imaging optical system thereof, the different receivers select their own outputs according to the different positions of image spots and the different response signals of the image elements which are covered by the image spots, thus realizing the tracking of light spots during the space diversity and the movement.

Method for transmitting diversity in orthogonal multiple carrier wave system

The invention relates to a method of transmitting deversity in orthogonal multi-carrier system. The orthogonal transmitting diversity is built based on circular autocorrelation characteristic of spread spectrum sequence. In code division multiple access system, each sequence {Cj.n} in set of spread spectrum sequence is as condition code of user. Since good autocorrelation characterstic of sequence {Cj.n}, the correlation value between sequence {Cj.n} and sequence with arbitrary circular shift of {Cj.n} is very low. When periodicity of sequence is invariant, the shifted sequence can be still treated as condition code of user, in multi-carrier codes division multiple access system. The invention can be used in transceiver of high-speed cellular mobile communication system or wireless local area network so as to realize two way communications 'point to point' or 'point to multi points'. Serious influence of channel fading in application environment can be restrained by simple practical method ...