DS-CDMA实现基本过程：

<TRANSMITTING END>待传信息--NRZ变换（变成NRZ码）---调制（乘以sqrt(2*eb)*cos(2*w*t)）----扩频（乘以m序列或其他伪随机码）

----信道中传输（有加性噪声）<DURING THE CHANNEL>

---解扩（乘以相同的m序列或其他伪随机码）---解调（乘以sqrt(2*eb)*cos(2*w*t)）----比特判别（sum(i)>0-->1 sum(i)<0--->0）-DS-CDMA to achieve the basic process: <TRANSMITTING END> Information to be passed- NRZ transformation (into NRZ code)--- modulated (multiplied by sqrt (2* eb)* cos (2* w* t ))---- spread spectrum (multiplied by the m-sequence or other pseudo- random code)---- channel transmission (with additive noise) <DURING THE CHANNEL>--- Despreading (multiplied by the same pseudo-random m-sequences or other code)--- demodulation (multiplied by sqrt (2* eb)* cos (2* w* t ))---- bit identification (sum (i)>　0->　1　sum (i) < 0--->　0)