一个四用户的扩频通信系统，扩频增益为N=16，采用Walsh码进行直接序列扩频，BPSK调制，无线信道为AWGN(加性高斯白噪声信道)信道(AWGN信道：不考虑通信信道信号时，由宽频范围描述的统计随机无线噪声。)。在接收端进行解扩，解调，判决，通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。,A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct

文件由两部分组成，直扩GMSK调制的matlab仿真程序和Verilog硬件程序。完成了对信号的扩频编码，GMSK调制，硬件程序中的高斯滤波器调用自matlab仿真产生。包括ds_gold_gmsk.m,mseq31.m,zhikuoGMSK.m以及d_encode.v,code_convert.v,frame.v,DS.v,gauss_filter.v,DS_GMSK_MD.v等编码，组帧，滤波，扩频，调制众多源码-Document consists of two parts, DSSS MS

n the telecommunications, direct-sequence spread spectrum (DSSS) is a spread spectrum modulation technique. Spread spectrum systems are such that they transmit the message bearing signals using a bandwidth that is in excess of the bandwidth that is a