通信中接收端的同步处理及在PlutoSDR上的实现

Synchronization processing of receiving end in communication and its realization on PlutoSDR

以通信系统中接收端的同步处理为研究对象,基于PlutoSDR软件无线电平台搭建了通信系统,并重点研究和实现了包含帧组同步、频偏估计和补偿、相偏估计和补偿的同步处理算法,最后通过2台PlutoSDR搭建了收发系统。结果表明:同步处理算法有效实现了帧组同步、频偏补偿和相偏补偿。测试中通过星座图可直观地理解实际通信系统中的频偏和相偏引起的问题,对于通信中同步这个较难的知识点的学习有很大帮助。

Taking the synchronization processing of the receiving end in the communication system as the research content, the entire communication system is built based on the PlutoSDR software radio platform, which focuses on the research and implementation of synchronization algorithms, including frame synchronization, frequency offset compensation and phase offset compensation. Finally, a transceiver system is built with two PlutoSDRs. The results show that the synchronization algorithm effectively achieves frame synchronization, frequency offset compensation, and phase offset compensation. In the test, the problems caused by the frequency offset and phase offset in the existing communication system can be easily understood by the constellation diagram, which helps to learn the difficult knowledge point of synchronization in communication.