A Method of Improving the Resolution of Gray Complementary Waveform Doppler
A resolution and Doppler technology, applied in the field of improving the Doppler resolution of the Gray complementary waveform, can solve the problems of reducing the Doppler resolution and indistinguishability, and achieve the effect of improving the Doppler resolution
Active Publication Date: 2020-08-04
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
However, the defect of this method is that the Doppler resolution of the above-mentioned radar transmission waveform is seriously reduced, which makes it difficult to distinguish targets with different velocities at the same position in actual target detection
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[0030] figure 2 It is the realization flowchart of the present invention. The specific implementation method comprises the following steps:
[0031] The first step is to generate a set of complementary waveform groups consisting of D binary sequences, and then perform baseband modulation to obtain complementary waveform group signals propagated in the time domain.
[0032] In the second step, the above-mentioned complementary waveform group signals are transmitted according to the standard transmission sequence, and the number of transmitted pulses is set to N, and then the echo signal is divided into two parts: the first N / 2 pulses and the last N / 2 pulses at the receiving end.
[0033] The third step is to design two sets of specific matched filtering weight sequences, which are denoted as the first set and the second set.
[0034] Design the first set of specific matched filter weight sequences for the first N / 2 pulses, denoted as [s 0 ,...,s n1 ,...,s N / 2-1 ], where n ...
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The invention provides a method for improving Doppler resolution of a Golay complementary waveform. The technical solution comprises the following steps: the first step, generating complementary waveform group signals that propagate in a time domain; the second step, transmitting the complementary waveform group signals in a standard transmission order; the third step, designing two groups of specific matched filter weight sequences; the fourth step, matching and filtering the echo signals of the first N / 2 pulses according to the first group of specific matched filter weight sequences to obtain the first group of outputted waveform signals which were matched and filtered; the fifth step, matching and filtering the echo signals of the last N / 2 pulses according to the second group of specific matched filter weight sequences to obtain the second group of outputted waveform signals which were matched and filtered; the sixth step, adding the two groups of outputted waveform signals which were matched and filtered to obtain final output waveform signals. The method further improves the Doppler resolution of the waveform, thereby the targets having different speeds at the same location can be better distinguished.
Description
technical field [0001] The invention belongs to the technical field of radar target detection and relates to a method for improving Doppler resolution of Gray complementary waveforms. Background technique [0002] When measuring radar target detection performance, fuzzy function is often used for analysis and evaluation. Different radar transmission waveforms correspond to different ambiguity functions. By analyzing the image of the ambiguity function, the delay resolution and Doppler resolution of the radar transmission waveform can be obtained, and the range sidelobe suppression performance of the radar transmission waveform can be judged. Golay complementary waveforms (Golaycomplementary waveforms) have very high time-delay resolution and have good application prospects in the field of radar target detection. In addition, based on an existing binomial design method of Gray complementary waveform, the echo signal of the transmitted signal of Gray complementary waveform is...
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IPC IPC(8): G01S13/00G01S7/41
CPCG01S7/418G01S13/006
Inventor 朱家华黄晓涛初宁范崇祎王学智比尔莫兰
Owner NAT UNIV OF DEFENSE TECH