4发射天线1接收天线在QPSK调制下的正交空时编码-4 transmission antennas in a receiving antenna orthogonal QPSK modulation space-time coding

带反馈的MIMO系统误码率仿真，应用空时编码，4发天线qpsk调制-The bit error rate simulation of the MIMO systems with feedback, the application of space-time coding, four rounds of antenna qpsk modulation