Abstract—2×2 unitary precoding based on receiver feedback is applied alongside spatial multiplexing at the base station in HSDPA (D-TxAA) when the mobile terminal supports MIMO transmissios [1]. This precoding will influence achievable sumrate

MIMO系统递推最小二乘参数估计（本程序针对2入2出系统） 在实际通信系统仿真过程中非常有用-The multiple-input multiple-output (MIMO) system recursive least square parameters estimation (the program into a system for 2 2) In the actual communication system simulation process is very useful

Prediction Error Method for Parameter Identification - the idea of relaxation, MIMO OFDM matlab simulation, Very convenient to use.