基于广义加扰的时域压缩扩频抗干扰能力增强方法  

Anti-jamming Ability Enhancement Method Based on General Scrambling for Time Domain Compressed Spread Spectrum Communication

作　　者：石荣 SHI Rong(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China)

机构地区：[1]电子信息控制重点实验室,四川成都610036

出　　处：《无线电通信技术》2021年第1期96-103,共8页Radio Communications Technology

基　　金：国家部委基金资助项目。

摘　　要：时域压缩扩频是继传统直接序列扩频之后写入通信传输标准的又一种新的扩频通信方式,其不仅具有抗频域窄带干扰的能力,还具有抗时域脉冲干扰的特点。在对时域压缩扩频与传统直接序列扩频特性对比分析的基础上,针对该类信号抗同周期宽带干扰能力不足的问题,通过广义加扰来消除其频域离散化线谱特征,在保持其原有抗干扰性能的基础上增强了对周期性干扰的抵抗能力,并通过压缩信号重复次数的调节实现了扩频增益的灵活控制。仿真结果验证了理论分析的正确性与有效性,不仅为时域压缩扩频通信的抗干扰性能提升和自适应抗干扰通信传输提供了重要理论指导,也为该类信号的工程优化应用提供了重要参考。Time domain compressed spread spectrum is a new mode written in the communication transmission standard after the traditional Direct Sequence Spread Spectrum(DSSS).It not only has the characteristics of narrow band anti-jamming in frequency domain,but also has powerful ability of pulse anti-jamming in time domain.After comparative analysis on the characteristics between time domain compressed spread spectrum and traditional DSSS,general scrambling is utilized to improve its periodic anti-jamming ability so as to eliminate the discrete line spectrum characteristics and maintain its original anti-jamming characteristics.Then flexible control on spread spectrum gain is realized by adjusting the repetition number of compressed signals.Finally,simulation results verify the correctness and effectiveness of theoretical analysis.This not only provides an important theoretical guidance for improvement of antijamming performance and adaptive anti-jamming transmission for time domain compressed spread spectrum communication,but also provides an important reference for engineering optimization application of this signal.

关 键 词：时域压缩扩频 直接序列扩频 多重复制 广义加扰 扩频增益控制 抗频域窄带干扰 抗脉冲干扰 抗周期性干扰 

分 类 号：TN914.42[电子电信—通信与信息系统] TN973[电子电信—信息与通信工程]