항공기 레이더에서 ＭＰＲＦ 모드의 추적 ＰＲＦ 선택 방법 및 이를 이용한 항공기 레이더

The present invention appends a sufficiently in order to understand of the present invention preferred embodiment drawing through a browser substrate. Is of the present invention in the embodiment can be modified in various forms, in the embodiment of the present invention describing downwardly comprise range is defined as an interpreted don't substrate. In the embodiment to the present invention with average knowledge in the art is the entire surface to account for power is applied ball number are disclosed. The drawing more clear description element in a shape or the like can be expressed in exaggerated parameter inputted by a user. Each drawing the same member when accomplishing the same references illustrated as a significantly to the second. The subject matter of invention can be decided to be breach of haze publicly known techniques detailed function and configuration to the first substrate.

Figure 1 shows a face tracking mode according to one embodiment of the invention MPRF PRF selection method therefore are disclosed.

The method according to one embodiment of the invention MPRF PRF tracking mode is selected, in aircraft radar clutter region (blind region) to assign a target is not located in a position corresponding to an altitude of aircraft, avoiding blind region PRF of PRF candidate from the group consisting of select, using the same PRF tracking can be sustained radar according to select.

As shown in fig. 1, tracking of the PRF MPRF mode method is selected, the permissible region defining step (S110), step (S120) derived PRF candidate group, optimum PRF selection step (S130), tracking PRF selection step (S140) without using a tool.

To this end, at least one process radar aircraft, comprising a memory for storing computer-readable instructions.

First, a plurality of hierarchies (S110) radar aircraft permissible region defining step. I.e., the permissible region defining step (S110) is then the one expected in clearance region for tracking target distance (range) in the permissible region (allowable zone) and Doppler (doppler) (or speed) defining other. Wherein, the permissible region distance and transmit a set number for each Doppler region bogie ambiguous gives the target not defined.

An integer number of folded (folding) of the target distance and speed PRI PRF and enhance clear the splice can comprise ambiguous near uninhabitable. To this end, the permissible region as follows distance Doppler region number transmit lines are deleted.

On the other hand, refers to the case 2a and also to transmit a telephone number also distance regions such as 2c [expressions 1] lines are deleted. 2A is also optimal in drawing and target location on a map indicating RD PRF (Range-a Doppler), drawing describing the permissible region in Z is also 2b are disclosed.

Wherein, according to the sampling time or other N empty (bin) are disclosed. In other words, bin includes a number representation is divided into every predetermined time sampling distance is provided, can be the distance resolution.

Wherein the meanings of said 1 parameter expressions as follows.

N_c The effects of clutter is predicted clutter distance bins representing areas and exhibits. Thus it is important for the region corresponding to the local distance clutter section number conditions are disclosed. N_c Is e.g., be a bin 21.

In addition, N_t Target distance bins is predicted by a goniophotometer.

In addition, N_Height The altitude of aircraft exhibits distance bins. The 2a also reference, corresponding to the altitude of aircraft distance bin previous zone clear area can be know. N_Height Is e.g., be a bin 104.

In addition, N_Ext The convenience is signal processing exhibits distance bins. Wherein, signal processing window processing, be a CFAR (Constant False Alarm Rate) treatment. N_Ext Is e.g., be a bin 20.

Expressions such as said 1, folded n times in distance used for entering empty PRI (N_PRI ) N signal for processing_Ext Since by and for the extra distance bins, N_t N since_Height - N_Ext In one previous number should be other. The 2b also can be shown for the leaves.

The temperature detector, N_t Can be a tracking waveform can know through the, distance of the target to clogging in folded n times N_t - N, N_PRI The, ground clutter, altitude of aircraft, and on an upper end by a lower limit the c1. extra PRI bins.

With reference to, the aforementioned N_t 2 And 3 can be known through to the expressions.

Wherein, R_Target Is predicted represents radar, R_Bin According to one sampling time-interval distance by a goniophotometer. R_Target For example, 35 km and, R_Bin For example, 47. 952M implementation being. C is a luminous flux (2. 997 × 10⁸ M/s) and, t_Sub Sampling time are disclosed. t_Sub Is e.g., 320ns are disclosed.

On the other hand, expressions in said 1 distance satisfying PRI expressions such as 4 to 30 parts by weight can be deleted. I.e., 4 in PRI satisfying expressions such as distance can be determined.

In addition, the PRF and PRI expressions 5 has an effect on a relationship, the equation can be satisfying PRI PRF through distance region.

And, with reference to the case 2c also transmit a Doppler region number lines are deleted as follows. 2C is drawing in describing the permissible region Doppler also are disclosed.

For the clear area may be changed but RD clutter map situation, generally Not clear near can be known. The, transmit a Doppler region case number Setting a permissible region preferably is not appropriately margin.

Here a permissible region When set home through a browser substrate.

The, case number 6 to transmit a Doppler region 2c also refers to the expressions such as lines are deleted.

Wherein, f_v Exhibit a Doppler frequency of the target is predicted, and expressions 7 to such as disclosed. The target Doppler frequency f_v The eggs can be a tracking waveform can be through.

Wherein, v_Target Is predicted and target speed, is wavelength λ are disclosed. v_Target For example, 600 m/s are disclosed.

Said expressions such as 6, once folded target f m in incoming Doppler_v - M, PRF is a lower limit and an upper limit of the cross lines are deleted.

On the other hand, said expressions satisfying said expressions 6 is 5 to 30 parts by weight PRI expressions such as Doppler region according 8 can be deleted.

Next, a plurality of hierarchies (S120) aircraft radar PRF candidate group deriving step. I.e., derived in said step (S120) and PRF candidate group Z is a expressions 4 and 8 N Doppler_PRI The deleted for common PRI candidate group satisfying and lead the PRF. I.e., the PRF (S120) is to organize his expressions 4 and 8 said candidate group deriving step, in which the PRF in Epon target predicted allow candidate group can be derived.

Specifically, fixing the folded n times distance region, said common expressions 4 and 8 N satisfying_PRI Within the range of m can be obtained. Wherein, integer n can be determined from the maximum detection distance range of radar. Through, a [n, m] set can be obtained. In respect of the expressions which has a 9, 9 to 10 m and expressions and expressions such as a flavor thereto disclosed.

For example, 35 km as a predicted speed of 600 m/s in which a remote target, the condition number one N_c =42, N_Ext =50, N_Height =104 when home when permissible region such as narrow, folded n times a number from 1 to 4 the valve timing of the distance region 4 to the [n, m] obtained increase possible while set by solar heat, [2, 2], [3, 1], [4, 1] are disclosed. The, N for respective set_PRI Range can be obtained. If, unless there is not common PRI and PRF is next set going to other.

In this way, drying [n, m] indicating the number of times a target responsive to the set of candidate checked PRF present.

Next, optimum aircraft radar PRF selection step operation done (S130). I.e., optimum PRF selection step (S130) Z is region a common number N Doppler region satisfying conditions_PRI If found, to be obtained by optimum candidate PRF selects from the group consisting of PRF. Here PRF candidate from the group consisting of thickening of the permissible region nearest PRF PRF selected candidate to optimal. This permissible region (optimal point) and if it is found not corresponding to near center of generalizations can be ambiguous PRF are disclosed. Also in respect of the pivotably on a metal thin film 3. Figure 3 shows a map for describing the 2 dimensional RD 2b and 2c also said also are disclosed.

The reference also 3, clear for viewing the permissible region (AZ) in target is defined. In addition, candidate number 1 (1), number 2 candidate (2), candidate number 3 (3) in, PRF candidate group (AZ) permissible region not included in the candidate number 1 (1) is outside and number, candidate number 2 (2) on the candidate number 3 (3) can be selected. (AZ) (OP) on PRF closest to the center of permissible region candidate PRF from the group consisting of number 2 is a candidate candidate (2) PRF selected to optimal.

Next, aircraft tracking radar PRF selection step operation done (S140). I.e., tracking PRF selection step (S140) of the target velocity and distance based on the selected optimal PRF distance region in common number satisfying conditions according to Doppler tracking PRF selects. This taking into account the situation data from which the target from the second optimum PRF are disclosed.

Tracking PRF selection step (S140) of the target is folded [n, m] Doppler region according to velocity and distance distance region from 1 to a predetermined number of times set entire need to be free. From the prediction of the target distance and speed to the end of the tracking filter tracking waveform are disclosed.

I.e., second tracking of the target tracking data expected current k (N_{PRI (k)} , N_(K) , M_(K) ) Receive a next t seconds after second tracking of the target tracking data to expected k + 1 are used. Second tracking of the target tracking data for optimal expected current k PRF can be applying tracking data.

The reference also 4 for the detailed to explain less than 1000. Figure 4 shows a face tracking PRF selection method according to one embodiment of the invention therefore are disclosed.

First, second tracking radar distance and speed of the target aircraft expected k identifying other (S141) according to tracking data. I.e., second tracking target distance r k predicted current_(K) A remote speed v_(K) And as a predicted, the tracer data (N_{PRI (k)} , N_(K) , M_(K) ) Are disclosed.

Then, second tracking radar aircraft expected target distance r k + 1'_{(K + 1)} And a speed v '_{(K + 1)} Estimating, k expected second tracking of the target tracking data (N_{PRI (k)} , N_(K) , M_(K) ) K + 1 a second tracking method uses (S142).

Then, a default k radar aircraft second tracking data (N_{PRI (k)} , N_(K) , M_(K) ) Of t seconds using the target (second tracking k + 1) in the area of the map as a matter of confirming whether each of the other (S143) allow RD.

The, aircraft radar map coat RD is present in the target location within the permissible region (S143), k (S144) holds the second tracking of the target tracking data as expected. I.e., aircraft radar tracking of the target tracking data expected k + 1 second k expected second tracking of the target tracking data set to each other.

While, in the area of the target location is RD allow aircraft radar map coat without fall onto the distance the permissible region (S145), in N current PRI bin_{PRI (k)} In the area of acceptable one reduce regulated so as to permit each other (S146).

In addition, in the area of the target location is RD allow aircraft radar map coat without distance permissible region onto (S143) is exceeded, in N current PRI bin_{PRI (k)} An acceptable increase in the area of one regulated so as to permit each other (S147).

The N_{PRI (k)} If permissible region even in a region outside the Doppler adjusting disapproval.

Thus, aircraft radar target location is in fact within the permissible region map coat RD message other (S148).

In this case does not allow the target location is in the area of the map coat RD, distance region or Doppler region when the out-of charge applying substrate.

First, in the permissible region is used to obtain a radar distance aircraft, in N current PRI bin_{PRI (k)} Adjusting a again has a plurality of hierarchies (S145).

Next, in the permissible region is used to obtain a Doppler radar aircraft, searching process has a plurality of hierarchies (S149) RD map coat peripheral permissible region again. Specifically, aircraft radar for target distance and speed of t seconds, indicating the number of times a [n, m] is folded target set of peripheral extension [n_(K) ± 2, m_(K) ± 2] per set an optimum N corresponding_PRI After deriving and storing, in a second PRI bin k + 1 N PRI bin nearest point of the permissible region_{PRI (k + 1)} To selects. Wherein, corresponding n, m is [n_{(K + 1)} , M_{(K + 1)} ] Set is under or over.

Next, when the target location is within the permissible region RD aircraft radar map coat (S148), second tracking of the target tracking data expected in N k_{PRI (k)} Adjusting a second tracking of the target tracking data expected k + 1 set other (S141).

Hereinafter, MATLAB simulation of the present invention is described through verification process to less than 1000.

Here displayed in substantially constant relative speed to 600 m/s at a distance below the current target 35 km away from his home scenario uprights. Current target aircraft radar distance differences is' R₀ 'When, t seconds of target aircraft radar distance' R (t)' is' R₀ - V * t ' can be represented. Figure 5 shows a time indicating a change in the aircraft radar target according to the distance between the surface also are disclosed. Figure 5 40 seconds in all cases, the distance between the target and aircraft radar shown over time.

In addition, relative velocity is not possible with the acronym, unchanged but Doppler frequency of the target, the distance between the target and aircraft radar 'R (t)' of the target distance according to empty ' N_t ' Angles such as S. 11 is varying.

Wherein, R_Bin According to one sampling time by big non-spacing distance.

In N PRI bin over time_PRI , PRF, n, m in fig. 6 to 8 respectively indicative of a change such as disclosed. Figure 6 shows a time variation and also according to PRI bin a drawing, which drawing indicating time according to PRF of Figure 7, Figure 8 time according to n, m surface variation are disclosed.

In this case distance changed and the number of times a constant number of times Doppler region folded region is folded, in N PRI bin over time_PRI Molecules can be significantly increased. On PFR PRI exhibits reverse relationship with each other.

Also 9a to 9c is a drawing indicating a change in the map as a matter of RD target location also are disclosed.

Also in Figure 7 N 9a to 9c is also_PRI In RD (t=16 - 18) exhibits a first change in position of the target map as a matter of rise in section.

In addition, a thread number 9a to 9c is also tracking of the target information in the waveforms also new PRF not applying a installing the PRF even when it is possible to simultaneously ambiguous amplifiers can be know to the subsequent tracking. I.e., aircraft radar MPRF waveform in use, PRI and PRF is not without installing the most optimal PRI and PRF ambiguous current value can be selected quickly.

Of the present invention in the embodiment described above is only exemplary to which, if a person with skill in the art of various deformation and equally to the technology field of the invention is enabling other therefrom may be know in the embodiment are disclosed. The present invention refers to said apparatus applies not limited only referred to as described in form may not only are disclosed. The technical idea of the present invention defined by appended claim of true technology protection range generated by the will. In addition, the present invention refers to the range of the present invention defined by the claims appended in uniform and replacement is understood to including all modified with psychiatric should.