Abstract
In this paper, the development of a millimeter-wave hybrid beamforming (HBF) transceiver system for 5G millimeter-wave multiple-input-multiple-output (MIMO) communication is presented. The developed transceiver system is operated at 28-GHz band in the time division duplex (TDD) mode, with 500-MHz signal bandwidth. To implement high beamforming accuracy, a phased-array-based HBF transceiver with high-precision phase shifting network (PSN) at intermediate-frequency (IF)-paths is proposed. The designed PSN has 8-bit phase resolution within 360° range and 0.13-dB amplitude variation. With the use of such low-cost 8-bit PSN, this HBF transceiver system achieves 0.6° beam resolution and a good RF transceiver performance. In addition, under the over-the-air MIMO communication test with two data streams, the error vector magnitude (EVM) of the received signals at two user equipment (UE) is 2.58% and 2.34%. The high-data rate millimeter-wave communication and MIMO performance of this HBF are verified.
Highlights
With the development of communication system technology, providing wider radio frequency (RF) bandwidth by utilizing millimeter-wave bands is a promising solution for 5G massive multiple-input multiple-output (MIMO) communication [1]–[3]
PHASED ARRAY TRANSCEIVER AND BEAM PERFOMANCE TESTS The hybrid beamforming (HBF) communication system signal quality is highly dependent on the transceiver performance
In this paper, a 32-antenna HBF transceiver system based on high precision phased array for mmWave MIMO communication is developed
Summary
With the development of communication system technology, providing wider radio frequency (RF) bandwidth by utilizing millimeter-wave (mmWave) bands is a promising solution for 5G massive multiple-input multiple-output (MIMO) communication [1]–[3]. Different from conventional communication systems in sub-6GHz frequency bands, mmWave bands promise great features like increased data transmission rate and improved spectrum efficiency. In order to overcome the increased path loss at higher frequency bands and realize multi-users communication, the beamforming technology with steerable radiation pattern and high gain characteristics is required. Many potential beamforming architectures have been proposed and analyzed, including analog beamforming architecture, fully digital beamforming architecture [4] and hybrid beamforming architecture [5]–[8]. The fully-digital beamforming (DBF) architecture can offer the greatest flexibility and performance, the DBF has some unavoidable problems, such as high cost level and huge power consumption.
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