Uplink Capacity of A Cellular System Using Multi-user Single-carrier MIMO Multiplexing Combined with Frequency-domain Equalization and Transmit Power Control

Authors:
Takahiro Chiba;Kazuaki Takeda;Kazuki Takeda;Fumiyuki Adachi
Affiliations:
Department of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University, Sendai-shi, Japan 980-8579;Department of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University, Sendai-shi, Japan 980-8579;Department of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University, Sendai-shi, Japan 980-8579;Department of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University, Sendai-shi, Japan 980-8579
Venue:
Wireless Personal Communications: An International Journal
Year:
2011

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Abstract

Multi-user single-carrier multiple-input multiple-output (MU SC-MIMO) multiplexing can increase the uplink capacity of a cellular system without expanding the signal bandwidth. It is practically important to make clear an extent to which the MU SC-MIMO multiplexing combined with frequency-domain equalization (FDE) and transmit power control (TPC) can increase the uplink capacity in the presence of the co-channel interference (CCI). Since the theoretical analysis is quite difficult, we resort to the computer simulation to investigate the uplink capacity. In this paper, frequency-domain zero-forcing detection (ZFD) and frequency-domain minimum mean square error detection (MMSED) are considered for MU signal detection. It is shown that ZFD and MMSED provide almost the same uplink capacity and that an advantage of fast TPC over slow TPC diminishes. As a result, MU SC-MIMO using computationally efficient ZFD can be used together with slow TPC instead of using MMSED. With 8 receive antennas and slow TPC, MU SC-MIMO multiplexing using ZFD can achieve about 1.5 times higher uplink capacity than SU SC-SIMO diversity.