摘要
针对自编码扩频系统存在误码传递产生的自干扰问题,本文提出了基于伪随机序列周期插值的自编码扩频系统,该方法采用周期的插入伪随机序列,改变自编码扩频通信系统的扩频序列的产生方式,隔断在接收端采用恢复的信息码元作为解扩序列对接收到的序列进行解扩产生的误码传递。本文构建了基于伪随机序列周期插值的自编码扩频系统,推导了基于伪随机序列周期插值的自编码扩频系统的理论表达式。理论分析与仿真结果表明:在高斯白噪声信道与瑞利信道情况下均可改善系统在低信噪比时的误码性能;通过倒谱分析表明基于伪随机序列周期插值的自编码扩频系统无周期性,未改变系统的隐蔽性能。
To solve the self-interference caused by the error code transmission in a self-encoded spread spectrum(SESS),we put forward an SESS based on the periodic interpolation of pseudo-noise sequences(SESS-PIPNs).This method used periodic insertion of pseudo-random sequence to change the generation mode of the spread spec-trum sequence of the SESS communication system,and isolates the error code transmission generated by the re-ceived sequence by using the recovered information symbol as the despread sequence at the receiver.The SESS-PIPN uses the periodic-insertion pseudo-random sequence partition error code transfer.In this study,the SESS-PIPN system is constructed,and its theoretical expression is derived.The theoretical analysis and simulation results show that the bit error rate performance of the system can be improved in the Gaussian white noise channel and Rayleigh channel.Meanwhile,the cepstrum analysis results show that the SESS-PIPN has no periodicity and has not changed the hidden performance of the system.
作者
孙志国
毛慧敏
王震铎
宁晓燕
SUN Zhiguo;MAO Huimin;WANG Zhenduo;NING Xiaoyan(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2023年第3期489-495,共7页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(62001138)
中央高校基本科研业务费专项资金项目(3072021CF0809)
先进船舶通信与信息技术工业和信息化部重点实验室项目(AMCIT2101-05)
黑龙江省高精度卫星导航及海洋应用重点实验室开放基金项目(HKL-2021-Y02)
黑龙江省博士后基金资助项目(LBH-Z20049).
关键词
自编码扩频
周期插值
伪随机序列
自干扰
误码传递
低信噪比
倒谱
隐蔽性能
self-encoded spread spectrum
periodic interpolation
pseudo-noise sequence
self-interference
error code transmission
low signal to noise ratio
cepstrum
covert performance
