伪随机序列的仿真与分析

Simulation and Analysis of PN Sequence

伪随机序列是具有随机特性的确定序列,应用范围很广泛,具有很好的相关性,较易实现。最常用的伪随机序列之一就是m序列,在此简单介绍m序列产生的原理、方法、性质及反馈系数。针对以往此类方法只能生成固定长度m序列的不足,结合寄存器和m序列反馈系数的特点,通过Matlab编程,有效地实现一种基于输入寄存器的初始状态和反馈系数产生任意长度m序列的方法,并分析相关特性;同时运用EDA软件,设计m序列产生器。仿真结果显示,这两种方法都可以准确地产生m序列,方便实用。

Because of good relativity and easily realizing,PN sequence has been used extensively in many fields. In all of PN sequences,m sequence is the one that is often used. The theory,the property and feedback coefficient of rn sequence are introduced briefly. Contraposing the shortage of this class methods can only create fixed length rn sequence,unite the characteristic of register and modulus of feedback,make the method of creat random length m sequence become true which is based on the in- itial value of register and the modulus of feedback by programming language with Matlab. Then the analysis of rn sequence and designing circuit with EDA are proposed. The simulation results show the correctness and feasibility of two methods.