Minimum mean square error single-user detection of SDMA signals transmitted over Nakagami fading channels

Abstract

In this contribution, the performance of a space-division multiple-access (SDMA) system is investigated, when the space-time block coded signals based on two transmit antennas are transmitted over Nakagami-m fading channels. In the proposed SDMA systems the receiver employs multiple receive antennas and each of the receive antennas consists of several antenna array elements. The antenna arrays' output signals are combined linearly based on the minimum mean square error (MMSE) principles, which only uses the knowledge associated with the desired user, i.e. we consider a single-user MMSE detector. Specific examples are provided for illustrating the properties of the MMSE detector. Our study and simulation results show that the MMSE detector is capable of facilitating joint space-time decoding, beamforming and receiver diversity combining, while simultaneously suppressing the interfering signals.