直扩与跳频的调制解调过程在CDMA的具体实现-DS and FH CDMA modulation and demodulation process in a concrete realization

直扩码分多址DS-CDMA是利用高速的WALSH正交码序列作为地址码,与多用户信息数据相乘得到信息数据的直接扩频信号,再经(the direct spread code division multiple access (DS-CDMA) is a direct spread spectrum signal which is used as an address code by using a high-speed WALSH orthogonal code sequence and is mu