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本文首先综述了DSP芯片的结构特点,指出用DSP芯片进行数字信号处理的优势所在,接着分析了用一片TMS320C25(简称C25)构成数字相关器时的实时性能极限,给出了影响其性能的原因和解决这一问题的一个方法—采用两片C25并行工作,并给出了双C25处理系统用作512点数字相关器的原理框图、运算流程图和性能分析.实验表明采用多片C25也能完成长样本相关运算且具有很高的性能价格比.
This paper first summarizes the structural characteristics of DSP chip, points out the advantages of digital signal processing with DSP chip, and then analyzes the real-time performance limit when using a TMS320C25 (referred to as C25) digital correlator, gives the reasons for its performance And a solution to this problem - using two C25 parallel work, and gives a dual C25 processing system used as a 512-point digital correlator block diagram, flow chart and performance analysis. Experiments show that using multiple C25 can Complete long samples of related operations and have a high cost performance.