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

can be used to calculate OCWT.

带丢包的线性均方最小方方差滤波器，这是在经典的kalman滤波器基础上修改的-LMMSE for systems with packet dropouts