自编码扩频和直接序列扩频的性能比较

基金项目:

国家自然科学基金,编号:60272008;国防科技重点实验室基金

详细信息

Private Communication and Self-Encoded Spread Spectrum

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。
- 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.
- spread spectrum communication /
- pseudo-noise sequence /
- self-encoded spread spectrum /
- direct sequence spread spectrum