MMSE transceivers with zero-forcing equalizers - Signal Processing and Optimization for Transceiver Systems - page 427

σ 2

Ι

covar .

q ( n )

s ( n )

J

M

s ( n ) M M P

Σ g

Σ f V h U h

H

P − M J − M

σ s 2

Ι

covar .

diagonal
matrix

diagonal
matrix unitary

matrix

unitary
matrix

channel

0
zero padding

ignore

precoder equalizer

Figure 12.12 . The optimal transceiver with rectangular channel. This is essentially
identical to the optimal system shown in Fig. 12.5 for the square channel. The diagonal
matrices Σ f and Σ g are as described in Theorem 12.1, and the unitary matrices U h
and V h are from the channel SVD (12.92).