用本原多项式提高扩频码速率的探讨

A method to enhance bit rate of linear code generator in spread spectrum system

鉴于器件的限制 ,扩频码的码速提高不能单纯依赖时钟的提高来解决 ,利用线性反馈移位寄存器(LFSR)的特征方程和m序列抽样原理 ,提出了将传统m序列扩频发生器的码速率提高 2 l(l=1,2 ,… ;2 l <n ,n为寄存器长度 )倍的方法 .该方法实现上不依赖于时钟的提高 ,只需通过在一个时钟周期内使寄存器单元状态发生 2 l跳变 ,同时对 2 l 个单元遍历输出来实现 .提出的方法可进一步推广到满足一定条件的非本原不可约多项式上 。

Presents a proposal based on the characteristic equation of linear feedback registers and the m sequences sampling principles to improve the speed of pseudo noise code generators 2 l(2 l<n,n is the length of registers) times as fast as the conventional one so that the spread spectrum processing gain and anti interference ability could be enhanced. While it is extended to the case of non reducible and non primitive polynomials to generate these linear codes at higher rates.