基于龙芯的数字信号处理实验平台设计

This paper designs a digital signal processing experimental platform based on Loongson. The platform adopts a domestic design scheme which is based on the VPX architecture to realize the scalability of platform functions. The signal processing board with the Loongson processor as the main control chip integrates a variety of controllers and interface modules. The domestic Linux system Loongnix is cut, configured, compiled and transplanted to the CPU. It manages the resources in the platform in a desktop mode and is convenient for experimental operations. The experimental environment is built based on the Python language, and the experiments about noise addition and filtering for speech signals have achieved good results. The test time and memory performance parameters also meet the experimental performance requirements. The platform has good performance, convenient operation, strong expansibility, etc. It can effectively reduce the dependence of core chips on imports and realize localized substitution.