Adaptive anti-jamming technologies based on direct sequence spread spectrum and single carrier frequency domain equalization

Fanglin GU; Yuzhen HUANG; Ying ZHAO; Haitao ZHAO; Jibo WEI

doi:10.11959/j.issn.1000-436x.2022213

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Adaptive anti-jamming technologies based on direct sequence spread spectrum and single carrier frequency domain equalization

Papers | 更新时间：2024-06-05

- Adaptive anti-jamming technologies based on direct sequence spread spectrum and single carrier frequency domain equalization
- Journal on Communications Vol. 43, Issue 11, Pages: 26-34(2022)
- 作者机构：
  
  1. 国防科技大学电子科学学院，湖南长沙 410073
  2. 军事科学院，北京 100097
  3. 北京信息通信技术研究中心，北京 100036
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61931020);The National Natural Science Foundation of China(62101569)
- DOI：10.11959/j.issn.1000-436x.2022213
  CLC： TN929.5
- Online First：2022-11，
  
  Published：25 November 2022
- 稿件说明：
移动端阅览
Fanglin GU, Yuzhen HUANG, Ying ZHAO, et al. Adaptive anti-jamming technologies based on direct sequence spread spectrum and single carrier frequency domain equalization[J]. Journal on Communications, 2022, 43(11): 26-34.
DOI：

Fanglin GU, Yuzhen HUANG, Ying ZHAO, et al. Adaptive anti-jamming technologies based on direct sequence spread spectrum and single carrier frequency domain equalization[J]. Journal on Communications, 2022, 43(11): 26-34. DOI： 10.11959/j.issn.1000-436x.2022213.

摘要

针对复杂多径信道环境下直接序列扩频系统性能受限问题，提出了一种单载波频域均衡（SCFDE）与直接序列扩频（DSSS）技术有机结合的自适应抗干扰扩频通信体制，其特点是通过频域均衡克服多径带来的频率选择性衰落，同时支持自适应调整扩频因子实现系统传输速率与抗干扰能力的重构。进一步地，结合 SCFDE 频域均衡的特点，充分利用其接收端固有的快速傅里叶（FFT）变换过程实现对干扰强度、干扰类型等信息的伴随式检测与分析，在线优化选取频域承载点，提升系统对干扰，特别是阻塞式干扰的适应性。仿真结果表明，无论是高斯还是多径信道环境下，所提的基于 SCFDE 的直扩波形都具有良好的通信性能，且部分频带陷波对通信性能影响较小，验证了自适应优选信息频域承载点抗干扰的有效性。

Abstract

To solve the performance limitation of direct sequence spread spectrum system in complex multipath environment

an adaptive anti-jamming spread spectrum framework that organically combines single carrier frequency domain equalization (SCFDE) and direct sequence spread spectrum (DSSS) technologies was proposed.The frequency multipath fading was overcame by frequency domain equalization

and the transmission rates and high reliability was reconfigured by deploying variable spread factors.Moreover

the inherent fast Fourier transform process was made full use at the receiver to realize the adjoint detection and analysis of interference intensity

interference type and other information

etc.Then

the frequency domain bearing point online was optimized and selected to improve the adaptability to the interference

especially blocking interference.The simulation results show that the proposed direct spread spectrum waveform based on SCFDE has good communication performance in both Gaussian and multipath environments

and the notch of some frequency bands has little impact on the communication performance

which verifies the effectiveness of anti-jamming by adaptive optimizing information frequency domain bearers.

关键词

Keywords

references

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WANG R . Research and implementation of interference suppression algorithm in SC-FDE system [D ] . Chengdu:University of Electronic Science and Technology of China , 2021 .

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