摘要
线性调频脉冲是最经典的大时宽－带宽积信号形式，但是这种信号的数字处理需要极大的处理量．本文研制了一个基于ＴＭＳ３２０Ｃ６２０１的高速实时数字脉冲压缩系统，具有１６００ＭＩＰＳ处理能力．针对ＴＭＳ３２０Ｃ６２０１的特点，提出了在ＶＬＩＷ体系结构下，提高ＦＦＴ并行运算效率的方法，从而使系统完成５１２点数字脉冲压缩的时间仅为１２４ｕｓ，基本达到ＴＭＳ３２０Ｃ６２０１的性能极限．针对系统定点运算的问题，提出了定点ＦＦＴ的改进算法，可以兼顾运算速度和精度的要求；对所提出的定点算法的误差进行了理论分析，并在实际的系统中验证了理论分析的结果．研究并解决了系统实现中高速电路等关键技术问题．目前，该系统已成功应用于某雷达系统中，长期工作稳定可靠．
Linear frequency-modulated pulse is one of the most important large time-bandwidth product signals, but it demands large amount of calculations for digital processing. Methods to improve parallelism of FFT calculation in VLIW architecture processor are studied, and a modified fixed-point FFT algorithm is promoted to meet the need of computation speed and accuracy, the calculation error of new algorithm also analyzed. Then a high-speed real-time digital pulse compression system based on TMS320C6201 is realized. It can implement DPC processing within 124 us, which is very close to the top performance of TMS320C6201. The whole system is applied in some radar and proved stable and reliable.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2001年第9期1272-1275,共4页
Acta Electronica Sinica
关键词
数字信号处理
线性调频
数字脉冲压缩
TMS320C6201
雷达
Algorithms
Fast Fourier transforms
Frequency modulation
Microprocessor chips
Parallel processing systems
Radar
Very long instruction word architecture
