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In this paper, we propose a novel low-complexity, multiple feedback successive interference cancellation (SIC) strategy for uncoded multiple-input multiple output (MIMO) spatial multiplexing systems. Since the complexity of the ML and the existing near ML algorithms such as the sphere decoder (SD) is still high in systems with bad channel conditions and/or low signal-noise ratio (SNR), there is a...
In this work, we investigate Multi-User Multiple-Input Multiple-Output (MU-MIMO) systems within the frame of an Orthogonal Frequency Division Multiple Access (OFDMA) communication scheme. We look at the case where two User Terminals (UT) having two transmit antennas each, are simultaneously communicating in Up-Link (UL) with the Base Station (BS) equipped with two receive antennas. We propose the...
Design of low-complexity detection schemes that can approach near-optimum bit error rate (BER) performance in multiuser or other multiple-input multiple-output (MIMO) systems has always been highly challenging. In this paper we propose and investigate a so-called receiver multiuser diversity aided multi-stage minimum mean-square error multiuser detection (RMD/MS-MMSE MUD) scheme operated in the principles...
Space-time coded modulation has been shown to efficiently use transmit diversity to increase spectral efficiency. Such high-rate orthogonal designs are available for complex symbol constellations only for two, three, and four transmit antennas. For five and six transmit antennas, two generalized complex orthogonal space-time block codes of rates 7/11 and 3/5 were proposed recently. In this correspondence,...
Multiple-input multiple-output (MIMO) systems achieve very high bandwidth efficiencies through spatial multiplexing. However, the complexity of optimal detection in such systems motivates the need for more practical alternatives. Recently, a suboptimal lower complexity detection scheme called ??generalized parallel interference cancellation?? (GPIC), with close to optimal performance, was introduced...
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