This m file generates a DS BPSK transmitter(spread spectrum) using PRBS s which are modulus 2 added(exclusive ored)with the message and then used to BPSK modulate a carrier.

产生2^5的二进制PRBS信号，编码成单极性NRZ,RZ信号并绘制出波形，把2^5的PRBS信息码编码成HDB3码和差分双向码并绘制出波形(The binary PRBS signal generated by 2^5 is coded into unipolar NRZ, RZ signal, and the waveform is plotted. The PRBS information code of 2^5 is encoded into HDB3 code and different