Two-stage BFGS-based hybrid precoding for mmWave multiuser MIMO systems

Millimetre wave (mmWave) communications are the most promising candidate for the future fifth-generation mobile broadband networks, which offer greater available spectrum than current cellular. However, the huge path loss and rain attenuation due to the characteristic of the mmWave channel make it d...

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Vydáno v:	IET communications Ročník 13; číslo 9; s. 1271 - 1277
Hlavní autoři:	Dong, Fuwang, Wang, Wei, Qi, Biqing, Wang, Ben
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	The Institution of Engineering and Technology 04.06.2019
Témata:	analogue radio‐frequency precoder analogue RF precoder baseband precoder broadband networks conventional MIMO systems extension algorithm fifth‐generation mobile broadband networks fully digital precoding hardware cost high‐power consumption hybrid precoding structure massive multiinput‐multioutput systems millimetre wave communications MIMO communication mmWave channel mmWave multiuser MIMO systems mmWave signals multiuser mmWave systems optimal fully digital precoder optimisation precoding rain attenuation Research Article signal‐to‐noise ratios single user systems system sum‐rate two‐stage Broyden–Fletcher–Goldfarb–Shanno two‐stage Broyden–Fletcher–Goldfarb–Shanno‐based hybrid precoding two‐stage hybrid precoding algorithm wireless channels millimetre wave communications hardware cost broadband networks precoding hybrid precoding structure high-power consumption two-stage hybrid precoding algorithm conventional MIMO systems single user systems optimisation mmWave multiuser MIMO systems mmWave signals mmWave channel wireless channels fifth-generation mobile broadband networks massive multiinput-multioutput systems MIMO communication baseband precoder signal-to-noise ratios analogue RF precoder rain attenuation analogue radio-frequency precoder two-stage Broyden–Fletcher–Goldfarb–Shanno-based hybrid precoding optimal fully digital precoder system sum-rate fully digital precoding two-stage Broyden–Fletcher–Goldfarb–Shanno multiuser mmWave systems extension algorithm
ISSN:	1751-8628, 1751-8636
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Popis
Shrnutí:	Millimetre wave (mmWave) communications are the most promising candidate for the future fifth-generation mobile broadband networks, which offer greater available spectrum than current cellular. However, the huge path loss and rain attenuation due to the characteristic of the mmWave channel make it difficult to realise. Thanks to the small wavelength of mmWave signals, massive multi-input-multi-output (MIMO) systems can be leveraged to overcome the path loss. Unfortunately, in contrast to conventional MIMO systems, high-power consumption and hardware cost make fully digital precoding impractical. In this study, the authors study the hybrid precoding structure for multiuser mmWave systems, which compromises the cost and performance. First, an extension algorithm from single user systems, which directly decomposes the optimal fully digital precoder into a baseband precoder and an analogue radio-frequency (RF) precoder, is introduced according to the recent work. Then, the drawback of this kind of algorithm is analysed at high signal-to-noise ratios. Subsequently, a two-stage hybrid precoding algorithm, which is based on the minimum mean-squared error criterion is proposed, where the modified Broyden–Fletcher–Goldfarb–Shanno (BFGS) algorithm is presented to reduce the reconstruction error of computing the analogue RF precoder. Simulation results show that the proposed precoding algorithm can significantly improve the performance of the system sum-rate.
ISSN:	1751-8628 1751-8636
DOI:	10.1049/iet-com.2018.5857