基于FPGA的短波扩频通信系带设计

摘要

本文介绍了一种基于FPGA的短波扩频通信系统的设计。扩频通信技术是一种利用伪随机序列对信号进行调制和解调的技术，可以提高通信系统的抗干扰性和保密性。该系统采用了基于DS-CDMA（直接序列扩频多址）的扩频技术，采用了QPSK调制和解调方式，使用了Xilinx Spartan-6系列FPGA作为系统控制和信号处理核心。通过对系统硬件电路的设计和软件编程的实现，实现了系统的信号处理、调制、解调和误码纠正等功能。实验结果表明，该系统具有较好的信号传输性能和抗干扰能力，可以实现可靠的短波扩频通信。

关键词：扩频通信；DS-CDMA；FPGA；QPSK

Abstract

This paper presents a design of a shortwave spread spectrum communication system based on FPGA. Spread spectrum communication technology is a modulation and demodulation technique that uses pseudo-random sequences to modulate and demodulate signals, which can improve the anti-interference and confidentiality of communication systems. The system adopts the spread spectrum technology based on DS-CDMA (Direct Sequence Code Division Multiple Access), uses QPSK modulation and demodulation, and uses Xilinx Spartan-6 series FPGA as the system control and signal processing core. Through the design of the system hardware circuit and the implementation of software programming, the signal processing, modulation, demodulation, and error correction functions of the system are realized. The experimental results show that the system has good signal transmission performance and anti-interference ability, and can achieve reliable shortwave spread spectrum communication.

Keywords: spread spectrum communication; DS-CDMA; FPGA; QPSK