... complexity and the extent of channel state information required at the receiver, we will introduce four types of combining schemes, including selection combining, switch combining, EGC, and MRC, in ... Recent Advances in Wireless Communications and Networks 62 2.1.3 Maximum ratio combining Fig. 3 shows the block diagram of the MRC scheme. MRC is a linear combining scheme, in which ... for handling inter-antenna interference, including zero-forcing (ZF), minimum mean square error (MMSE), interference cancellation, etc., are then introduced. The third part of this chapter introduces...