这篇实验报告阐述了无线通信系统仿真的原理。主要完成两个任务，任务一是BPSK调制在AWGN信道和在rayleigh信道下的性能比较，任务二 CDMA扩频多用户系统。这篇报告介绍了相关原理，并且在附录上有matalb源代码及注释。-This report describes the experimental wireless communications system simulation theory. Completed two major tasks, First, the task BPS

cdma系统在AWGN和瑞利信道下的性能分析，matlab实现-cdma systems in AWGN and Rayleigh channel performance analysis, Matlab implementation

Direct sequence spread spectrum (DSSS) communication systems has been widely used in these years for its advantage of wide spectrum, low working Signal-to-Noise ratio (SNR), anti-interference, anti-multipath effect and capability of LPI and LPD.

The main aim of our project is to simulate CDMA modem using DS-SS (Direct sequence spread spectrum) in MATLAB. Spread spectrum is basically type of modulation that spreads data transmission across available frequency band, in excess of minimum ban