In this study, the authors propose a lattice reduction (LR)-based doublyiterativereceiver for joint channel estimation and detection in multiple-input-multiple-output (MIMO) bit-interleavedcodedmodulation systems....
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In this study, the authors propose a lattice reduction (LR)-based doublyiterativereceiver for joint channel estimation and detection in multiple-input-multiple-output (MIMO) bit-interleavedcodedmodulation 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 channel estimation using sampling results is proposed to achieve the maximum likelihood channel estimation 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 iterativereceiver can have comparable bit-error rate performance with a reasonable computational complexity.
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