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Paper Detail

Paper:	SPCOM-L8.5
Session:	MIMO STC and Decoding
Time:	Friday, May 19, 17:50 - 18:10
Presentation:	Lecture
Topic:	Signal Processing for Communication: MIMO precoder/decoder design, receiver algorithms
Title:	Channel Dependent Termination of the Semidefinite Relaxation Detector
Authors:	Joakim Jalden, Björn Ottersten, Royal Institute of Technology (KTH), Sweden
Abstract:	We study the problem of semidefinite relaxation (SDR) for detection of symbols transmitted over a general MIMO channel. In the SDR detector the maximum likelihood detection problem is relaxed into a semidefinite program (SDP) which is solved numerically using an interior-point path-following algorithm. Herein, we provide a criteria which, based on the channel matrix realization, determine the accuracy required by the SDP solver to give a good bit error rate performance of the overall SDR detector. This also reduce the complexity of the SDR detector as it limits the number of interior iterations required in the SDP solver. The performance is demonstrated through simulations.