In this study, the authors propose a lattice reduction (LR)-based doubly iterative receiver for joint channelestimation and detection in multiple-input-multiple-output (MIMO) bit-interleaved coded modulation systems....
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In this study, the authors propose a lattice reduction (LR)-based doubly iterative receiver for joint channelestimation and detection in multiple-input-multiple-output (MIMO) bit-interleaved coded modulation systems. For the inner iteration loop of the receiver, LR-based randomised sampling detection is employed to enjoy the tradeoff between performance and complexity while for the outer iteration loop, the expectation-maximisation (em)-based iterative channelestimation using sampling results is proposed to achieve the maximum likelihood channelestimation performance. Besides, a modified computational efficient em-based channel estimation approach is also derived to reduce the complexity further. Simulation results demonstrate that the proposed doubly MIMO iterative receiver can have comparable bit-error rate performance with a reasonable computational complexity.
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