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A method of power distribution in a multi-antenna two-way relay transmission system

A two-way relay and transmission system technology, applied in the field of power distribution, can solve the problems of spectral efficiency loss, relay nodes cannot transmit and receive at the same time, and cannot occupy time-frequency resources, etc.

Active Publication Date: 2019-09-24
ZHEJIANG UNIV OF TECH
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Problems solved by technology

However, since the communication system nodes are generally half-duplex, the introduction of relays will bring about the so-called half-duplex loss
This is because during each transmission, since the relay node cannot simultaneously send and receive on the same time-frequency resource, the source or relay node in the relay system cannot occupy all the time-frequency resources
This brings about a loss in spectral efficiency

Method used

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing of description, but protection scope of the present invention is not limited thereto:

[0029] like Figure 1-2 As shown, it is a schematic diagram of the transmission process of the multi-antenna two-way relay system based on Hermitian precoding in the present invention. It can be seen from the figure that before the transmission starts, the channel information in the system is first collected, and then each node performs precoding Matrix design and power allocation; the subsequent transmission process is divided into two time slots. In the first time slot, two source nodes send at the same time. In the second time slot, the relay node forwards the information received in the previous time slot. source node to receive, the specific steps are as follows:

[0030] 1.1) In a multi-antenna two-way relay system, two source nodes S 1 and S 2 Information is exchanged through a re...

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Abstract

The invention discloses a power distribution method in a multi-antenna bidirectional relay transmission system. According to the power distribution method disclosed by the invention, in a case that total power of source nodes and relay nodes is limited, aiming to maximize a system throughput, power of the source nodes and the relay nodes and power of each node on each piece of data stream can be subjected to combined optimization. According to the power distribution method disclosed by the invention, aiming at the multi-antenna bidirectional relay transmission system based on Hermitian precoding, not only is the original characteristic, i.e., two source nodes carry out bidirectional transmission by a relay to save a transmission time slot, of the system retained, but also the system throughput can be further improved by distributing the power of each node and the power of each node on each piece of data stream.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a power distribution method in a multi-antenna two-way relay transmission system based on Hermitian precoding. Background technique [0002] In recent years, with the growth of demand for wireless communication services, the field of wireless technology has also developed vigorously. In a cellular communication system with a relay station, the base station and the user assist in uplink and downlink communication through the relay station. This constitutes a two-way relay system. [0003] Whether for mobile cellular systems or Ad-Hoc wireless networks, relay technology can increase coverage, improve link reliability and enhance link capacity. This is because the relay station is closer to the destination node, and the relay station can significantly improve the receiving signal-to-noise ratio of the destination node by forwarding the signal of the source node. At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/155H04B7/0404H04B7/0456H04B7/0426
CPCH04B7/0404H04B7/0426H04B7/0456H04B7/15528Y02D30/70
Inventor 张昱苏长然彭宏卢为党华惊宇
Owner ZHEJIANG UNIV OF TECH
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