A digital-analog hybrid beamforming method suitable for common wireless communication channels

A digital beamforming and beamforming technology, applied in radio transmission system, sustainable communication technology, diversity/multi-antenna system, etc., can solve performance degradation and other problems

Active Publication Date: 2020-04-24
SOUTHEAST UNIV
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  • Description
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Problems solved by technology

However, this scheme is still only applicable to the [-90°, +90°] sectors, and performance degradation occurs when the number of discrete sampling angles exceeds twice the number of antennas

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  • A digital-analog hybrid beamforming method suitable for common wireless communication channels
  • A digital-analog hybrid beamforming method suitable for common wireless communication channels
  • A digital-analog hybrid beamforming method suitable for common wireless communication channels

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Embodiment Construction

[0049] Taking massive MIMO public channels as an example below, the present invention is further explained in conjunction with the accompanying drawings. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art will understand the present invention Modifications of various equivalent forms of the invention all fall within the scope defined by the appended claims of the present application.

[0050] In the field of wireless communication, in the context of massive MIMO systems, multi-user beamforming has been extensively studied as a transmission scheme for dedicated channels, but research for public channels is relatively scarce. In the actual situation of high cost of hardware equipment, 5G communication also has high energy efficiency requirements for massive MIMO system design, making transmit power and high e...

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Abstract

The invention provides a digital-analog hybrid beam forming method with high power efficiency aiming at a public channel with any sector size in a large-scale MIMO wireless communication system, and thus transmission power is minimized and power amplification efficiency is improved while quality of service (QoS) of all users in the sector is ensured. Firstly an optimal ideal beam directional diagram is deduced via Parseval equality. Then, inherent trade-off between beam directional diagram parameters is mined by using a convex optimization technique and using association between the beam directional diagram and the response of a finite impulse response (FIR) filer, and thus a full-digital high efficient beam forming vector close to the ideal beam directional diagram is acquired. At last, the beam forming vector with the same beam directional diagram and the lowest peak-to-average power ratio (PAPR) is acquired through searching by using an equivalent beam directional diagram principle, and an implementation method with low complexity under a digital-analog hybrid pre-coding architecture is provided based on a triangular construction theorem.

Description

technical field [0001] The present invention designs a power-efficient hybrid beamforming method for the common channel of a massive MIMO wireless communication system, specifically a method for any sector size, based on convex optimization, filter design principles, equal beam pattern theory and The invention relates to a high-efficiency hybrid beamforming method based on the principle of geometric triangle construction, which belongs to the technical field of wireless communication. Background technique [0002] At present, in the context of massive MIMO systems, multi-user beamforming has been extensively studied as a transmission scheme for dedicated channels, but research for common channels is relatively scarce. Common channels are mainly used to broadcast important synchronization / reference / control signals. Since the common channel needs to serve all users with any location in the sector, the transmission design is usually based on the assumption that the base statio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/06
CPCH04B7/0413H04B7/0617Y02D30/70
Inventor 黄永明张铖姜波儿
Owner SOUTHEAST UNIV
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