一种改进的混合多进制正交扩频技术  

An Improved Technique of Hybrid M-ary Orthogonal Spread Spectrum

作　　者：周军[1] 王青松 严大媛 ZHOU Jun;WANG Qing-song;YAN DA-yuan(N0.30 Institute of CETC,Chengdu Sichuan 610041,China;Military Commission Equipment Development Department Representative Office in Shijiazhuang Region,Shijiazhuang Hebei 050081,China)

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041 [2]军委装备发展部驻石家庄地区军代室,河北石家庄050081

出　　处：《通信技术》2019年第2期343-346,共4页Communications Technology

摘　　要：直接序列扩频技术具有抗干扰能力强、截获概率低等优点,但是该技术在带宽受限的短波通信中则不适用,多进制扩频技术可以在不扩展信号带宽的条件下通过降低传输速率达到扩频增益的目的。在传统的多进制正交扩频的基础上,提出了一种基于多进制扩频和差分调制的混合多进制正交扩频技术方案,在信号带宽和传输速率不变的情况下提高了系统的传输性能,并针对短波3G中的BW1波形开展了仿真,验证了该方案的性能。Direct Sequence Spread Spectrum(DSSS)technology has strong anti-jamming ability and low probability of interception.But DSSS is not suitable for bandwidth-limited HF communication.The m-ary orthogonal spread spectrum can achieve the spread spectrum gain by reducing the transmission rate without expanding the signal bandwidth.In this paper,on the basis of traditional m-ary orthogonal spread spectrum,a technical scheme of hybrid m-ary orthogonal spread spectrum based on differential modulation and m-ary orthogonal spread spectrum is proposed.Under the condition of same bandwidth and transmission speed,the performance of new scheme is improved.Simulations of the HF 3G BurstWave_l show that the proposed scheme is better than traditional scheme.

关 键 词：混合多进制正交扩频 差分调制 短波 

分 类 号：TN914.42[电子电信—通信与信息系统]