A Sparse Optimization Approach for Beyond 5G mmWave Massive MIMO Networks

Abstract

Millimeter-Wave (mmWave) Massive MIMO is one of the most effective technology for the fifth-generation (5G) wireless networks. It improves both the spectral and energy efficiency by utilizing the 30-300 GHz millimeter-wave bandwidth and a large number of antennas at the base station. However, increasing the number of antennas requires a large number of radio frequency (RF) chains which results in high power consumption. In order to reduce the RF chain's energy, cost and provide desirable quality-ofservice (QoS) to the subscribers, this paper proposes an energy-efficient hybrid precoding algorithm for mmWave massive MIMO networks based on the idea of RF chains selection. The sparse digital precoding problem is generated by utilizing the analog precoding codebook. Then, it is jointly solved through iterative fractional programming and successive convex optimization (SCA) techniques. Simulation results show that the proposed scheme outperforms the existing schemes and effectively improves the system performance under different operating conditions.

A Novel Approximate Message Passing Detection for Massive MIMO 5G System

“…QRM-MLD is designed for Orthogonal Frequency Division Multiplexing (OFDM) structures in [22]. It is noted that the proposed detection QRM-MLD reduces the complexity of the structure by 95% and a gain of 2 dB is obtained as compared with the traditional MLD method [23]. The simulation outcomes obtained optimal performance as compared with the conventional algorithms.…”