多核DSP已成为软件无线电技术(SDR)的重要组成部分,主要负责通信系统中的基带数字信号处理。通信系统对于功耗有严格要求,使得面向软件无线电应用的多核DSP低功耗研究变得越来越重要。根据基带数字信号的处理特点,设计了基于数据和任务驱动门控时钟的特殊指令及相关硬件功能部件。多核DSP通过执行特殊指令调用时钟控制单元,适时开启和关闭DSP核,从而降低多核DSP的功耗。针对目标多核DSP的实验表明,采用该设计方法能有效地降低多核DSP的平均功耗。
The low-power design of multi-core DSP has become more and more important.According to the baseband digital signal processing features,this paper proposes a data-driven and task-driven gated clock method to control the DSP core's on and off in the multi-core DSP.Experimental results show that multi-core DSP design using the proposed method has good power performance.