仿真比较4-QAM和4-FSK调制信号在RAYLEIGH衰落信道下的误符号率和误比特率性能-4-QAM and 4-FSK modulation signal simulation comparison in Rayleigh fading channel under the symbol error rate and bit error rate performance

OFDM的基本算法，采用QAM/QPSK ，信道为多径衰落条件下(The basic algorithm of OFDM. QAM/QPSK, and the channel is multipath fading.)