扩频m序列发生器提高速率的方法  

A Method to Improve the Speed of m sequence Generator

作　　者：党小宇[1] 周廷显[1] 

机构地区：[1]哈尔滨工业大学电子与通信工程系

出　　处：《遥测遥控》1998年第4期15-19,共5页Journal of Telemetry,Tracking and Command

摘　　要：直接扩频系统中，在基带信息数据流的码速率较高时，为保证一定的扩频增益，必须采用高速扩频伪码。由于反馈器件的限制，高速伪码不能采用单独依赖提高时钟频率的方法。该文从线性反馈移位寄存器（ＬＦＳＲ）的特征方程和ｍ序列抽样原理两方面推导出将ｍ序列扩频伪码发生器码速率提高２ｌ（ｌ＝１，２，…，２ｌ＜ｎ，ｎ为寄存器级数）倍的方法，从而确保提高扩频增益和抗干扰能力。In spread spectrum system,high speed spread spectrum pseudo noise codes are supposed to be adopted to guarantee certain spread spectrum processing gain,in the case that base band information data stream is at rather high speed.Because of the limits of feedback devices,high speed pseudo noise code generation cannot depend simply on the improvement of clock rate.Based on the characteristic equation of linear feedback reqisters and the m sequences sampling principle as well,deduction is made to indicate a novel way 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 spread spectrum processing gain and anti interference ability could be enhanced.

关 键 词：扩频 伪随机信号发生器 M序列 

分 类 号：TN911.6[电子电信—通信与信息系统]