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A joint-channel diagonalization for multiuser MIMO antenna systems

Wong, K-K.; Murch, R.D.; Letaief, K.B.; (2003) A joint-channel diagonalization for multiuser MIMO antenna systems. IEEE Transactions on Wireless Communications , 2 (4) pp. 773-786. 10.1109/TWC.2003.814347. Green open access

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In this paper, we address the problem of improving the performance of multiuser space-division multiplexing (SDM) systems where multiple independent signal streams can be transmitted in the same frequency and time slot. The problem is important in multiuser multiple-input multiple-output systems where communication from one base station to many mobile stations can occur simultaneously. Our objective is to devise a multiuser linear space-time precoder for simultaneous channel diagonalization of the multiuser channels enabling SDM. Our new approach is based on diagonalizing the multiuser channel matrices and we use a variation of successive Jacobi rotations. In addition to the diagonalization, our approach attempts to optimize the resultant channel gains for performance enhancement. Our method is valid for both frequency-flat and frequency-selective fading channels but we assume that the base station knows all the channels and that they are quasi-stationary.

Title:A joint-channel diagonalization for multiuser MIMO antenna systems
Open access status:An open access version is available from UCL Discovery
Publisher version:http://dx.doi.org/10.1109/TWC.2003.814347
Additional information:©2003 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:Capacity, co-channel interference (CCI), diversity, joint-channel diagonalization (JCD), multiple-input multiple-output (MIMO), multiuser communications, smart antennas, space-division multiplexing (SDM), spectral efficiency
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering
UCL > School of BEAMS > Faculty of Engineering Science > Adastral Park

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