1 research outputs found
Hybrid Precoder and Combiner Design with One-Bit Quantized Phase Shifters in mmWave MIMO Systems
Analog/digital hybrid precoder and combiner have been widely used in
millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems due to
its energy-efficient and economic superiorities. Infinite resolution of phase
shifters (PSs) for the analog beamformer can achieve very close performance
compared to the full-digital scheme but will result in high complexity and
intensive power consumption. Thus, more cost effective and energy efficient low
resolution PSs are typically used in practical mmWave MIMO systems. In this
paper, we consider the joint hybrid precoder and combiner design with one-bit
quantized PSs in mmWave MIMO systems. We propose to firstly design the analog
precoder and combiner pair for each data stream successively, aiming at
conditionally maximizing the spectral efficiency. We present a novel binary
analog precoder and combiner optimization algorithm under a Rank-1
approximation of the interference-included equivalent channel with lower than
quadratic complexity. Then the digital precoder and combiner are computed based
on the obtained baseband effective channel to further enhance the spectral
efficiency. Simulation results demonstrate that the proposed algorithm
outperforms the existing one-bit PSs based hybrid beamforming scheme