关于qpsk调制的代码，详细描述和仿真了qpsk的调制过程和AWGN信道-About qpsk modulation code, a detailed descr iption and simulation of the qpsk modulation process and the AWGN channel

MODULATION SCHEMES BPSK MODULATION QAM MODULATION QPSK MODULATION BCH CODING SPREAD SPECTRUM