中文说明：此代码关于cdma通信系统仿真，包含基带信号产生，编码器，解码器，解调，采用Qpsk调制，伪随机码gold序列，信道均衡技术，
English Description：
This code on CDMA communication system, contains a baseband signal, encoder, decoder and demodulator, using Qpsk modulation, sequence of pseudorandom code gold, Channel equalization,