基于FPGA的跳频通信系统开发

Development of Frequency-Hopping Communication System based on FPGA

摘要:

为了提高通信的抗干扰和保密性,对跳频通信进行了研究,通过分析跳频通信的实现方式,提出基于FPGA的跳频通信系统实现方案。该方案中发端信号采用QPSK调制,接收端采用超外差接收以达到减少噪声和提高接收灵敏度的效果,接收端跳频同步采用等待自同步的跳频捕获和基于延迟锁相环的跳频跟踪。测试结果表明所设计的跳频通信系统可以正确实现跳频通信。与传统跳频通信实现方案相比,该方案具有灵活性强、开发周期短、开发费用低等优点。

Abstract:

A frequency-hopping communication system is studied in this paper to improve the anti-interference performance of communication systems. Through analyzing the principle of frequency-hopping communication system, its implementation scheme is proposed which is based on the QPSK modulation using FPGA. A super heterodyne receiving mode is used in the receiver to reduce noise and improve the receiving sensitivity. The receiver also uses self-synchronization of waiting for carrier capture and delay phase-locked loop for carrier tracking in the process of carrier synchronization. The test results prove the presented scheme can implement the frequency-hopping communication correctly, which is more flexible, cost-effective than the other solutions of frequency-hopping communication system.