摘要
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。
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.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2003年第5期473-476,529,共5页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金
编号:60272008
国防科技重点实验室基金
关键词
扩频通信
伪随机序列
自编码扩频
直接序列扩频
spread spectrum communication
pseudo-noise sequence
self-encoded spread spectrum
direct sequence spread spectrum
