自编码扩频和直接序列扩频的性能比较

基于自编码扩频在传输数字信息时能实现扩频码动态可变的现象，讨论了自编码扩频的原理、传输特性，引入等效扩频增益描述其性能变化，并针对自干扰现象提出了改进方法。通过分析和仿真表明，虽然自编码扩频的增益与经典扩频实际上相同，但是通信的隐蔽性得到了改进。
关 键 词 扩频通信; 伪随机序列; 自编码扩频; 直接序列扩频

Abstract Self-encoded spread spectrum(SESS) system employs random spreading sequences extracted from the information date to assure dynamically random varying. Performance analysis of self-encoded spread spectrum in additive white Gaussian noise channels is presented. An equivalent spread spectrum gain is used to describe the characteristic of self-encoded direct sequence spread spectrum system. Improved approaches generating self-encoded spread spectrum sequences are introduced. Theoretical analysis and computer simulation show that the spread spectrum gain of self-encoded direct sequence spread spectum system is almost the same to conventional spread spectrum system, but private of self-encoded direct sequence spread spectum system increases with variability of spread spectrum codes.
Key words spread spectrum communication; pseudo-noise sequence; self-encoded spread spectrum; direct sequence spread spectrum