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Full-duplex multi-antenna relay transmit beamforming method under outage probability constraints

A transmit beam, full-duplex technology, applied in diversity/multi-antenna systems, duplex signal operation, space transmit diversity, etc., can solve problems such as difficult access to channel state information, system interruption, etc., to minimize relay transmission High power, good for engineering implementation, and low computational complexity

Active Publication Date: 2020-12-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In actual multi-antenna communication systems, it is often difficult to obtain accurate channel state information, which leads to system interruption problems

Method used

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  • Full-duplex multi-antenna relay transmit beamforming method under outage probability constraints
  • Full-duplex multi-antenna relay transmit beamforming method under outage probability constraints
  • Full-duplex multi-antenna relay transmit beamforming method under outage probability constraints

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Embodiment Construction

[0033] The present invention will be described in detail below through a preferred embodiment and in conjunction with the accompanying drawings.

[0034] The typical application scenario of the present invention is a full-duplex multi-antenna relay system with channel state information errors. By optimizing the relay transmit beamforming vector, the relay transmit power can be minimized under the premise of satisfying the system outage probability constraints. ,like figure 1 As shown, the embodiment of the present invention discloses a full-duplex multi-antenna relay transmit beamforming method under the constraint of outage probability, and the specific steps are as follows:

[0035] (1) Set the transmission rate threshold and the system outage probability according to the performance requirements of the full-duplex multi-antenna relay system.

[0036] (2) According to the given transmission rate threshold and the outage probability allowed by the system, with the goal of mi...

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Abstract

The invention discloses a beamforming method for full-duplex multi-antenna relay transmission under the constraint of interruption probability. According to the method, the interruption problem in a full-duplex multi-antenna relay system caused by a channel state information error is taken into consideration. Through optimization of a beamforming vector of a relay transmitter, the transmitting power of a relay side is minimized on the premise that the interruption probability of the system is limited. Compared with half-duplex multi-antenna relay, the method has the advantages that the relay transmitting power can be lowered remarkably. Moreover, the computation complexity of the method is lower, which is beneficial to engineering implementation.

Description

technical field [0001] The invention relates to a relay communication system, in particular to a full-duplex multi-antenna relay transmission beamforming method under the constraint of interruption probability. Background technique [0002] Traditional relay stations usually use a half-duplex mechanism, which is characterized by only receiving signals from the source or forwarding signals to the sink within a certain time or frequency band. Although half-duplex relay transmission is easy to implement in hardware, it will cause loss of spectral efficiency because it does not effectively utilize time-frequency resources. Recently, with the continuous development and progress of radio frequency and baseband technology, researchers have begun to explore relay transmission under the full-duplex mechanism, that is, the relay station completes signal reception and forwarding at the same time and in the same frequency band. Resources increase the system transfer rate. Since the mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04L5/14
CPCH04B7/0617H04L5/14Y02D30/70
Inventor 沈弘许威赵春明
Owner SOUTHEAST UNIV