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Capacity-aware linear MMSE detector for OFDM-SDMA systems

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2 Author(s)
Sulyman, A.I. ; King Saud Univ., Riyadh, Saudi Arabia ; Hefnawi, M.

This paper presents a capacity-aware linear minimum mean square error (MMSE) detector for orthogonal frequency-division multiplexing/space-division multiple access (OFDM-SDMA) applications. We derive closed-form expressions for the signal-to-interference plus noise ratio (SINR) performance of OFDM-SDMA systems with linear MMSE detection method, where capacity enhancements have been introduced in the transmit/receive weight computations. Using the derived expressions, we compare the performance of the proposed scheme with the regular multiple-input multiple-output (MIMO)-MMSE system in OFDM-SDMA applications. It is shown that in enhancing the system capacity, the capacity-aware MIMO-MMSE scheme also enhances the SINR, resulting in lower symbol error rate (SER) compared to the conventional MIMO-MMSE beamforming schemes.

Published in:

Communications, IET  (Volume:4 ,  Issue: 9 )

Date of Publication:

June 11 2010

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