This letter shows that the receiver processing of the Vertical Bell Labs La
yered Space-Time (V-BLAST) architecture may be viewed as a generalized deci
sion feedback equalizer (GDFE) as applied to a multiple-input-multiple-outp
ut (MIMO) channel. It is proven that, depending on the criterion chosen to
reduce the interference, the receiver operations of the V-BLAST system are
fundamentally equivalent to either a Zero-Forcing (ZF) or a minimum-mean-sq
uare-error (MMSE) GDFE.