Wireless MIMO switching: distributed zero-forcing and MMSE relaying using network coding

EURASIP Journal on Advances in Signal Processing

Table 1 The minimum relays required for different relaying schemes

Relaying	Nonreciprocal	Reciprocal
schemes	Pairwise/non-pairwise	Pairwise	Non-pairwise
ZF in [14]	K(K−2)+1	$\frac{1}{2} K (K - 2) + 1$	K(K−2)+1
ZF in [15]	K ²	$\frac{1}{2} K (K + 1)$	K ²
Proposed ZF	K(K−2)+1	$\frac{1}{2} K (K - 2) + 1$	K(K−2)+1
Proposed MMSE	No strict requirement of minimum relays