BCH编码译码，码间距离为7，可纠三个错，保证通信的可靠性，以（15，5）为例，生成多项式可以自由改动-BCH codec, the distance between the code of 7, three errors can be corrected to ensure the reliability of communications to (15,5), for example, are free to change the generating polynomial

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