实现BCH编译码，仿真了BCH（15，5，7）码，在不同调制方式下（BPSK,QPSK,16QAM,64QAM）的误码率性能曲线。-BCH encoding and decoding, simulation BCH (15,5,7) code, in a different modulation mode (BPSK, QPSK, 16QAM, 64QAM) bit error rate performance curve.

BCH(15,5,7)a communication system consists of binary source, 3 error-correcting BCH code of length 15 over GF(24) (i.e, BCH (15,5,7 code), the primitive polynomial is p(x)=1+x+x4), BPSK modulator, AWGN channel, coherent demodulator, decoder (either B