基于DSP的软件无线电QPSK相干解调技术研究

基于DSP的软件无线电通信平台实现,要求能够实时快速准确完成调制解调编码解码等功能,因此对程序算法的效率要求很高,同时又必须保证结果的准确,软件无线电台有其特有的灵活性,因此必须对算法加以特殊处理以满足要求.基于TMS320C6201DSP平台,以软件无线电方式实现了实时QPSK通信平台,包括实时编解码、全自动识别、调制解调等,主要就解调过程中的软件锁相、判决、软件位同步及系统优化等关键技术提出了解决方案及改进措施,主要包括算法原理,算法简化及优化,最终实现了实时通信,达到了预期的结果,通过实践证明,文中提到的算法与改进都是行之有效的.

Coherent Demodulation Technologies of Software Radio QPSK Based on DSP

The software radio station based on DSP requires a quick and accurate realization of functions including demodulation and decoding etc. So it has a high demand on the efficiency. The software radio station has its own agility so that special treatment must be taken to meet the needs. This article realizes a real-time communication platform using SDR technology on the TMS320C6201 DSP. The platform includes real-time encoding and decoding, full-automatic mode recognition, modulation and demodulation, etc. The improvement of the key technologies including software phase lock, judging, software bit-synchronization and the system optimization is emphasised. The result is as expected and the improvement of the algorithms in the article is effective.