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Bit Interleaved Coded Multiple Beamforming in Millimeter-Wave Massive MIMO Systems


An analysis of the diversity gain for bit-interleaved coded multiple beamforming (BICMB) method and BICMB with perfect coding (BICMB-PC) in millimeter-wave (mm-Wave) massive multiple-input multiple-output (MIMO) systems is carried out for both the single-user and multi-user scenarios. We show that full diversity gain and full spatial multiplexing order can be achieved in both scenarios. Also, we show that the diversity gain becomes independent of the number of transmitted data streams and the number of antennas in each remote antenna unit (RAU) at the transmitter and the receiver. Furthermore, in the multi-user scenario, the diversity gain is independent from the number of users in the system, when BICMB or BICMB-PC is utilized. Furthermore, we study BICMB with orthogonal frequency division multiplexing (OFDM) in order to achieve maximum diversity gain in mm-Wave massive MIMO distributed antenna subarray systems. The assumption here is that the channel state information (CSI) is known at both sides of the transmitter and the receiver and the number of antennas in each RAU tends to infinity. This latter assumption can be relaxed by a large number of antennas in each RAU, similar to the case for all massive MIMO research. Simulation results show that when the perfect CSI assumption is satisfied, the use of BICMB results in the diversity gain values predicted by the analysis.

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