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

Abstract

Professor Ender Ayanoglu, ChairAn 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.

Bit-Interleaved Coded Multiple Beamforming With Perfect Coding in Millimeter-Wave MIMO Systems

“…One can compare this result with the diversity gain calculated for the single-user scenario in [1]. As it can be seen, similar to [11], the full diversity gain and full multiplexing gain is achieved in this paper.…”

“…2 illustrates the results for BICMB perfect coding (BICMB-PC) for different values of D and L ij in a mm-wave massive MIMO system. Furthermore, we can see the comparison of the BICMB-PC with the BICMB results in [11]…”

“…Also, β ij is a real-valued nonnegative number and represents the largescale fading effect between the ith RAU at the receiver and jth RAU at the transmitter. Note that in this work, we use Saleh-Valenzuela model for each subchannel H ij [11], [19], [20].…”

“…CN(0, N 0 ) noise samples, where N 0 = N t S N R and SN R is defined as the signal-to-noise ratio (SNR), W RF is the M r N r × N RF r RF combining matrix, and W BB is the N (RF) r × N s baseband combining matrix. A solution based on singular value decomposition (SVD) of the channel matrix H = UΛV H can be derived for the beamforming matrices [11], [21]. By utilizing the optimal precoder and combiner, one can write (8) as…”

“…1547155. systems. To overcome this diversity degradation, in [11], we proved that by using BICMB in a single-user mm-wave massive MIMO system with distributed antenna-subarray architecture both full diversity gain and full multiplexing gain can be achieved. Furthermore, unlike [2], the diversity gain can be increased by increasing the number of remote antenna units (RAUs) at both the transmitter and the receiver side.…”