TMS320C25双芯片模块构成的高速信号处理系统

为了解决声频信号的高速、实时信号处理，本文采用多块TMS320C25双芯片功能模块，与主机构成主从分布式系统，运算速度可达72MOPS，比通用微机运算速度提高2-3个数量级，可同时实时处理多种声频信号。本文介绍了该系统的硬件结构，系统功能特点以及应用。

A High-Speed Signal Processing System Composed of Dual-TMS320C25 Modules

The performance of an up-to-date sonar should be improved in order to overcome to a certain degree the effect of target noise attenuation and reflection reducing coating l,2].To meet this requirement, the data throughput of a new-generation sonar processing system should be increased to 40-80 MOPS,as estimated by Curtis 1] and Rafik et al 4]. This paper presents a signal processing system which is characterized as follows: 1.High speed. Advanced DSP chips (TMS320C25s)are selected to form a master-slave distributed multi-processor system. A parallel processing scheme and the independent multi-bus architecture are applied to the system Its throughput is as high as 72 MOPS, which is comparable with a fifth-generation computer 7,10]. 2.Multiple functions. The system is capable of simultaneously accomplishing real time processings for different types of sound signals. With the same hardware,it can implement various processing functions for both an airbone dipping sonar and a sonobuoy system. Technical problems of compatibility and comprehensive handling of operating modes, waveform processing and operating bands for these two different systems are solved successfully. 3.Good flexibility.Every module of the system is of the same structure,which contains two TMS320C25s and identical hardware architecture. As a result, the data transferring frequency is lowered effectively, while the flexibility and readiness for extension of the system is greatly enhanced. The systen can meet the requirements of high-speed and real-time processings for various sound signals. Laboratory experiments made on the system are successful. By using ten TMS320C25s (which may be easily extended to sixteen TMS320C25s), its throughput reaches 72.8 MOPS, which is six or seven times higher than that of an existing airborne sonar.