摘要
直接序列扩频具有抗干扰能力强、截获概率低等优点,因此在军用和民用通信中得到广泛的应用,变换域滤波技术可以抑制直扩系统中的强窄带干扰,尤其是时变窄带干扰,干扰信号的功率大大减少了,从而提高了信噪比。直扩接收机中采用变换域滤波技术是提高无线通信设备抗干扰能力的理想方案之一。在原理分析的基础上,给出了直扩-变换域滤波接收机关键模块的具体实现方案。对该接收机的实现具有较高的参考和实用价值。
Direct-Sequence Spread-Spectrum technology for its good immunity to interference and interception,is widely used in both military and civilian communication systems,while transform-domain filter technology could suppess the strong narrowband interference in DSSS system,particularly the time-variance narrowband interference.The interference power is reduced greatly and thus the SNR of the received signal is improved dramatically.Therefore the adoption of transform-domain filter technology in DSSS receiver is an ideal scheme in improving anti-jamming capability of wireless communication system.Based on detailed principle analysis,the implementation scheme for key technical modul of anti-jamming receiver with joint DSSS and Transform domain filter is given.This design scheme is of significant reference and practicability for the receiver implementation.
出处
《通信技术》
2011年第1期16-18,21,共4页
Communications Technology
关键词
直扩系统
变换域滤波
干扰抑制
FPGA
DSSS system
transform-domain filter
interference suppression
FPGA
