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

03/12/2019
by   Sadjad Sedighi, et al.
0

In this paper we carry out the asymptotic diversity analysis for millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) systems by using bit interleaved coded multiple beamforming (BICMB). First, a single-user mmWave system which employs M_t antenna subarrays at the transmitter and M_r antenna subarrays at the receiver is studied. Each antenna subarray in the transmitter and the receiver has N_r and N_t antennas, respectively. We establish a theorem for the diversity gain when the number of antennas in each remote antenna unit (RAU) goes to infinity. Based on the theorem, the distributed system with BICMB achieves full spatial multiplexing of L_t=∑_i,jL_ij and full spatial diversity of (∑_i,jβ_ij)^2/∑_i,jβ_ij^2L_ij^-1 where L_ij is the number of propagation paths and β_ij is the large scale fading coefficient between the ith RAU in the transmitter and the jth RAU in the receiver. This result shows that one can increase the diversity gain in the system by increasing the number of RAUs. Simulation results show that, when the perfect channel state information assumption is satisfied, the use of BICMB increases the diversity gain in the system.

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