功能：CDMA调变 multiple access b/w 2 users using DS CDMA-multiple access b/w 2 users using DS CDMA format is : cdmamodem(user1,user2,snr_in_dbs) user1 and user2 are vectors and they should be of equal length

在MATLAB环境下，直接序列扩频通信系统的仿真，由伪随机码，在进行BPSK调制。-In the MATLAB environment, the simulation of direct sequence spread spectrum communication system, by a pseudo-random code, during the BPSK modulation.