Patent ID: 7627052

Claim:
A multiple-input multiple-output (MIMO) communications system comprising: a transmitter configured to transmit M source signals; a transmit antenna array connected to said transmitter and comprising M antenna elements for transmitting the M source signals; a receive antenna array comprising N antenna elements for receiving at least M different summations of the M source signals, with N being less than M; a receiver connected to said receive antenna array and configured to receive the at least M different summations of the M source signals; and a signal separation processor connected to said receiver for forming a mixing matrix comprising the at least M different summations of the M source signals so that the mixing matrix has a rank equal to at least M; said signal separation processor for separating desired source signals from the mixing matrix based on a knowledge based processing signal extraction process, with the knowledge based signal separation process separating the desired source signals from the mixing matrix based on at least one of a zero forcing (ZF) process, and a minimum mean squared estimation (MMSE) process.