一种超长点数脉压的实现方法
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摘要
脉压被广泛用于雷达系统以提高系统分辨率.随着宽带雷达的不断发展,雷达脉压点数也在不断增长.本文介绍了一种基于二维分解超长点数FFT算法的超长点数频域脉压实现方法.在TMS320C6678评估板上的试验结果表明,新方法较传统方法效率提升超过20%,单片主频1GHz的C6678完成128K点脉压仅需约0.81ms.
As a wide spread technology in radar systems,pulse compression is used to improve the radar resolution.With the development of wide band radar systems,the points of pulse compression become larger and larger.A method of fast implementation of ultra-long points pulse compression in frequency domain based on 2-D FFT algorithm is proposed.TMS320 C6678 EVM board is used to test the new method.The experiment result shows that the efficiency of the proposed method is improved by more than 20% compared with the traditional methods.128 K points pulse compression can be finished in about 0.81 ms by only one 1 GHz TMS320 C6678 chip.
As a wide spread technology in radar systems,pulse compression is used to improve the radar resolution.With the development of wide band radar systems,the points of pulse compression become larger and larger.A method of fast implementation of ultra-long points pulse compression in frequency domain based on 2-D FFT algorithm is proposed.TMS320 C6678 EVM board is used to test the new method.The experiment result shows that the efficiency of the proposed method is improved by more than 20% compared with the traditional methods.128 K points pulse compression can be finished in about 0.81 ms by only one 1 GHz TMS320 C6678 chip.
引文
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[2] 李方慧,等.基于TMS320C6201的并行高速实时数字脉冲压缩系统研究[J].电子学报,2001,29(9):1272-1275.LI Fanghui,et al.Study of the high-speed real-time digital pulse compression system based on TMS320C6201[J].Acta Electronica Sinica,2001,29(9):1272-1275.(in Chinese)
[3] 高西全,丁玉美.数字信号处理[M].4版.西安:西安电子科技大学出版社,2016.92-100.GAO Xiquan,DING Yumei.Digital Signal Processing[M].4th ed.Xian:Xian Electronic and Science University Press,2016.92-100.(in Chinese)
[4] 郭骁,等.超长点数FFT的设计与实现技术[J].信号处理,2013,29(11):1488-1494.GUO Xiao,et al.Design and implementation of ultra long points FFT[J].Journal of Signal Processing,2013,29(11):1488-1494.(in Chinese)
[5] 郑颖熙.基于高性能通用DSP的雷达信号实时处理关键技术研究[D].成都:电子科技大学,2006.44.
[6] Texas Instruments.Very Large FFT Multicore DSP Implementation Demonstration Guide [DB/OL].http://ap-fpdsp-swapps.dal.design.ti.com/index.php?oldid=103203,2013-5-11.
[7] Texas Instruments Incorporated.TMS320C6678 Multicore Fixed and Floating-Point Digital Signal Processor (SPRS6 91C)[EB/OL].http:/www.ti.com.cn,2012.11-18.
[8] 杨方.基于TMS320C6678的多核DSP并行处理应用技术研究[D].北京:北京理工大学,2014.19-38.
[9] 夏际金,等.多核并行的大点数FFT、IFFT设计[J].火控雷达技术,2016,45(1):64-68.XIA Jijin,et al.Large point FFT and IFFT design based on multicore parallel processing[J].Fire Control Radar Technology,2016,45(1):64-68.(in Chinese)
[10] 周海滨,等.基于华睿1号的高性能数字脉压设计和实现[J].现代雷达,2012,34(4):28-31.ZHOU Haibin,et al.Design and implementation of high-performance DPC based on HuaRui-1[J].Modern Radar,2012,34(4):28-31.(in Chinese)
[11] 夏际金,等.一种多核DSP的距离多普勒成像设计[J].雷达科学与技术,2016,14(2):169-172.XIA Jijin,et al.Range-Doppler imaging design based on multi-core DSP[J].Radar Science and Technology,2016,14(2):169-172.(in Chinese)
[12] 方志红,张长耀.逆序循环在原位FFT中的应用[A].2010计算机技术与应用进展[C].合肥:中国科学技术大学出版社,2010.43-46.