Semiblind Uni-ALS receiver for a two-way MIMO relaying system based on the PARATUCK2 model

作者: Xi Han , Yingchun Zhou , Andre L.F. de Almeida , Walter da C. Freitas

DOI: 10.1016/J.DSP.2020.102916

关键词: Alternating least squaresIdentifiabilitySpectral efficiencyUniquenessZero Forcing EqualizerAlgorithmMIMOCoding (social sciences)Communication channelComputer science

摘要: Abstract In this paper, we consider a two-way multiple-input multiple-output (MIMO) relaying system employing simplified space-time (ST) coding at both sources. The signals received each source form third-order tensor, which satisfies parallel tucker2 (PARATUCK2) model. Exploiting structure, present novel semiblind united alternating least squares (Uni-ALS) receiver for jointly estimating the transmitted symbols and individual channels. identifiability uniqueness conditions are analyzed. contrast to training-based receivers, such as tensor-based channel estimation (TENCE), two-stage training (TST) zero forcing (ZF) receiver, proposed improves spectrum efficiency. Simulation results show that yields superior performance in comparison with receiver.

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