Robust Analog Precoding Designs for Millimeter Wave MIMO Transceivers With Frequency and Time Division Duplexing

GMD-Based Hybrid Precoding For Millimeter-Wave Massive MIMO Systems

Hybrid precoding can significantly reduce the number of required radio frequency (RF) chains and relieve the huge energy consumption in mmWave massive MIMO systems, thus attracting much interests from academic and industry. However, most existing hybrid precoding schemes are based on singular value decomposition (SVD). Due to the very different subchannel signal-to-noise ratios (SNRs) after SVD...

Millimeter-Wave Circuit Design for Radar Transceivers

Low Complexity Hybrid Precoding and Diversity Combining Based on Spatial Lobes Division for Millimeter Wave MIMO Systems

In this paper, we focus on the design of low complexity hybrid analog/digital precoding and diversity combining in the millimeter wave multiple-input multiple-output (MIMO) systems. Firstly, by exploiting the sparseness property of the millimeter wave in the angular domain, we propose a spatial lobes division (SLD) to group the total paths of the millimeter wave channel into several spatial lob...

A Hardware-Efficient Analog Network Structure for Hybrid Precoding in Millimeter Wave Systems

Hybrid precoding has been recently proposed as a cost-effective transceiver solution for millimeter wave (mmwave) systems. While the number of radio frequency (RF) chains has been effectively reduced in existing works, a large number of high-precision phase shifters are still needed. Practical phase shifters are with coarsely quantized phases, and their number should be reduced to a minimum due...

Channel Reconstruction-Based Hybrid Precoding for Millimeter Wave Multi-User MIMO Systems

The focus of this paper is on multi-user multi-input multi-output (MIMO) transmissions for millimeter wave systems with a hybrid precoding architecture at the base-station. To enable multi-user transmissions, the base-station uses a cell-specific codebook of beamforming vectors over an initial beam alignment phase. Each user uses a user-specific codebook of beamforming vectors to learn the top-...