2*2、4*4、8*8和16*16的信道容量随信噪比变化-2* 2,4* 4,8* 8 and 16* 16 channel capacity changes with the signal to noise ratio

空时分组编码两发一收的发射方案，误码率随信噪比的变化-Space time block coding two send a received transmission scheme, the error rate with the change of signal to noise ratio