随机信号发生器.doc

I 西华大学课程设计说明书随机信号发生器的设计摘要: 着现代通信系统处理的最大数据速率的不断提高,需要高速的伪随机测试信号发生器。通过对 m序列生成原理的研究,提出了一种基于 FPGA 的高速伪随机序列产生的方法。该方法基于 m序列的采样定理和移位相加性,并行产生多组初始相位不同的 m序列,最后通过模 2加法器获得高速的 m序列。从 m序列的基本原理出发,给出了实现该高速 m序列发生器的硬件设计,并用 ISE 、ModelSim 软件对其进行仿真。实验结果表明,使用该方法实现的伪随机序列发生器,结构简单、速度快。关键词: FPGA; 伪随机序列; m序列;线性移位寄存器; XC5VLX50T Abstract : With the continuous increment ofmaximum data rate munication system ,weneed ahigh-speed pseudo random test signal generator .Through the study ofm-sequence generation principle ,this paper puts forward agenerating method ofhigh-speed pseudo random sequence based onFPGA .This method isbased onm-sequence sampling theorem and shift additively .Itcan parallel produce multiple groups ofm-sequence ,which has different initial phase .Finally ,through the modulo-2 adder ,wecan obtain ahigh-speed m-sequence .Departure from the basic principles ofthe m-sequence ,hardware design and ISE 、ModelSim software simulation of high-speed m-sequence generator isachieved .The results ofexperiment indicate that the pseudo-random sequence generator which uses this method has asimple structure and fast speed . Keywords : pseudo-random sequence ;m-sequence ;shift register theory ; XC5VLX50T II 西华大学课程设计说明书目录 1 前言............................................................................................................................................................ 1 2 总体方案设计........................................................................................................................................... 2 方案比较....................................................................................................................................... 2 方案一............................................................................................................................... 2 方案二............................................................................................................................... 2 方案三...............................................