基于多核DSP的多路信号实时解调技术

摘要

多核DSP具有极高的运算能力。介绍了基于TI公司多核DSP （ TMS320C6678）的多路信号实时解调实现方法，该芯片具有8个核处理器，在软件处理流程中，使用一个核处理器进行资源管理和调度，其他核处理器中实现PSK信号的Gardner定时算法和载波恢复等数字正交解调算法。给出了软件速度和性能的优化方法，包括定点浮点混合编程技术、线性汇编技术和Cache的优化操作等。通过优化使多核DSP芯片能够完全满足超短波频段内多路信号的实时解调。%Multi-core DSP has a very high ability of data processing;a real-time digital signal demodulation realization scheme based on TI’s multi-core DSP (TMS320C6678) is described.There are 8 cores in the chip,during the software process,one core is used for the management of resource,and the other cores are used for realization of the Gardner algorithm for timing recovery and algo-rithm for carrier recovery.The speed and performance optimization methods are introduced,including the control of thread using fixed-point and floating point programming,linear assemble and the optimum use of Cache.The multi-core DSP satisfies the real time demodu-lation of multi-channel in the VHF after optimization.