Minimum variance linear receivers for multi-access interference rejection in space-time block coded MIMO communication systems

• Published in: 2003 37th Asilomar Conference on Signals, Systems and Computers Vol. 1; pp. 1017 - 1021 Vol.1
• Main Authors: Shahbazpanahi, S., Beheshti, M., Gershman, A.B., Gharavi-Alkhansari, M., Wong, K.M.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2003
• Subjects: Block codes; Error analysis; Maximum likelihood decoding; MIMO; Multiple access interference; Power generation; Receiving antennas; Transmitters; Transmitting antennas; Wireless communication
• ISBN: 9780780381049; 0780381041
• DOI: 10.1109/ACSSC.2003.1292075

The problem of joint space-time decoding and multi-access interference (MAI) rejection in multi-user multiple-input multiple-output (MlMO) wireless communication systems is considered. We address the case when both the receiver and multiple transmitters are equipped with multiple antennas and when space-time block codes (STBCs) are used to send the data simultaneously from each transmitter to the receiver. A new linear receiver structure is developed to decode the data sent from the transmitter-of-interest while rejecting MAI, self-interference and noise. The proposed receivers are designed by minimizing the output power subject to constraints which zero-force self-interference and/or preserve a unity gain for all symbols of the transmitter-of-interest. Simulation results show that in multi-access scenarios, the proposed techniques have substantially lower symbol error rates as compared to the matched filter (MF) receiver which is equivalent to the maximum likelihood (ML) space-time decoder in the point-to-point MIMO communication case.