The invention discloses a fFour-core parallel large-point pulse compression algorithm
A large-point, pulse-pressure technology, applied in the field of large-point pulse pressure algorithm, can solve problems such as difference, Doppler influence, flexibility and programmability gap, achieve high parallelism, improve real-time performance, and optimize time-consuming the effect of the situation
Active Publication Date: 2019-04-12
SHANGHAI RADIO EQUIP RES INST
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[0006]Patent CN104407330B (Pulse Compression Method for Phase Code Modulation Signal) introduces a pulse compression method for phase code modulation signal, focusing on solving phase code radar echo signal in The problem of Doppler influence in pulse compression does not involve the real-time optimization of pulse compression algorithm
[0007] In the 9th issue of 2013 "Special Technology and Engineering Application" the published document "Parallel Pipeline Implementation of DSP-Based Pulse Compression Algorithm" introduces a multi-core The method of calculating the pulse pressure by means of parallel flow, the pulse pressure algorithm is decomposed once, which is still different from the second decomposition of the present invention, and the parallel method is not completely adopted to realize the optimization of the pulse pressure algorithm
[0008] In the 3rd issue of "Electronic Technology" in 2016, the published document "Two Pulse Pressure Optimization Algorithms and Implementations for Small Signals" introduces a method using backward inference The method of generating optimized pulse compression coefficients for two kinds of hourly wide-bandwidth product signals and improving the ratio of main and side lobe of pulse compression does not involve the optimization of the real-time performance of the pulse compression algorithm.
[0009] In the 5th issue of "Aerospace Electronic Countermeasures" in 2017, the published document "FPGA-Based Parallel Digital Pulse Pressure Design" introduced a pulse pressure based on FPGA method, which has high processing efficiency, but compared with DSP implementation, there is still a certain gap in the flexibility and programmability of FPGA development
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[0041]The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the protection scope of the present invention.
[0042] Example conditions: On the TI 6678 platform, a pulse of 8192 points enters the quad-core parallel pulse pressure process.
[0043] Such as figure 1 Shown, the method that the present invention proposes carries out the following steps to above-mentioned embodiment condition:
[0044] S1. Read the input data of 8192 points, and assign 0, 1, 2, 3 quad-cores to execute parallel pulse pressure;
[0045] S2. Core 0 takes the data with the point number divided by 4 and the remainder 1, and generates sequence 3; core 1 takes the data with the point number divided by 4 and the remainder 3, and generates sequence 4; core 2 takes the data with the point number divided by 4 with the remainder 2, and ge...
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The invention discloses a four-core parallel large-point pulse compression algorithm. A DIT-FFT principle is utilized to decompose large-point FFT and inverse FFT of N points into a combination of four N / 4 points through two times of butterfly operationDIT-is utilized; according to the FFT principle, large-point FFT and inverse FFT of N points are respectively decomposed into a combination of fourN / 4 points through two times of butterfly operation, and four cores are distributed for parallel calculation, so that the operation time of the large-point pulse pressure algorithm is remarkably shortened, the real-time performance of the system is improved, and the engineering application value is relatively high.
Description
technical field [0001] The invention relates to a pulse compression algorithm, in particular to a four-core parallel pulse compression algorithm with a large number of points. Background technique [0002] Pulse compression technology is widely used in modern radar systems. On the premise of ensuring the radar velocity resolution, a large time-band product pulse compression signal is used to improve the range resolution of the radar. Pulse compression technology is the practical application of matched filter theory and related receiving theory. It transmits large-time-width and bandwidth signals at the transmitting end to improve the speed measurement accuracy and speed resolution of the signal; at the receiving end, the wide pulse signal is compressed into a narrow pulse. , in order to improve the range resolution accuracy and range resolution of the radar to the target. [0003] The implementation method of pulse pressure processing system has been continuously developed ...
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IPC IPC(8): G06F9/38G06F9/302G06F17/14G01S7/32
CPCG06F9/3001G06F9/3887G06F17/142G01S7/32
Inventor 沈謇王志诚陈文彤余渝生田原赵晗希
Owner SHANGHAI RADIO EQUIP RES INST