摘要
扩频通信广泛应用于卫星、雷达、广播通信等诸多领域。在扩频通信系统中,接收端对于因收发系统相对运动所引入的多普勒频偏非常敏感,当存在多普勒频偏时一方面影响解扩处理,导致增益损失通信捕获失败,另一方面影响解码处理,导致通信误码率的增高。本文针对扩频通信接收系统多普勒频偏敏感问题,设计一种频偏估计及补偿方案,利用通信鉴频序列测算频偏并调整接收端本振频率,实现无偏接收。本文详细介绍了算法原理及实现方法,提供了仿真结果,所设计方案可提高通信稳定性。
Spread spectrum communication is widely used in various fields such as satellites,radar,and broadcast communication.In spread spectrum communication systems,the receiver is highly sensitive to Doppler frequency offset introduced by the relative motion between transmitter and receiver.The presence of Doppler frequency offset not only affects the despreading process,leading to gain loss and communication acquisition failure,but also impacts the decoding process,resulting in increased communication bit error rate.This paper proposes a frequency offset estimation and compensation scheme to address the sensitivity of spread spectrum communication receivers to Doppler frequency offset.By utilizing a communication frequency discrimination sequence,the scheme estimates the frequency offset and adjusts the local oscillator frequency of the receiver to enable frequency-offset-free reception.The paper provides a detailed introduction to the scheme principle and implementation method,and offers simulation results.The proposed scheme can enhance the stability of communication.
作者
任泽宇
白昊
REN Zeyu;BAI Hao(Xi'an Electronic Engineering Research Institute,Xi'an 710100)
出处
《火控雷达技术》
2025年第4期73-79,共7页
Fire Control Radar Technology
关键词
扩频通信
解扩
多普勒频偏
spread spectrum communication
despreading
Doppler frequency offset
