  For multi-input multi-output (MIMO) K-user interference networks, we propose
the use of a channel transformation technique for joint detection of the useful
and interference signals in an interference alignment scenario. We coin our
detection technique as "pseudo-lattice treatment" and show that applying our
technique, we can alleviate limitations facing Lattice Interference Alignment
(L-IA). We show that for a 3-user interference network, two of the users can
have their interference aligned in lattice structure through precoding. For the
remaining user, performance gains in decoding subspace interference aligned
signals at the receiver are achieved using our channel transformation
technique. Our "pseudo-lattice" technique can also be applied at all users in
case of Subspace Interference Alignment (S-IA). We investigate different
solutions for applying channel transformation at the third receiver and
evaluate performance for these techniques. Simulations are conducted to show
the performance gain in using our pseudo-lattice method over other decoding
techniques using different modulation schemes.
