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Self-interference suppression method for full-duplex unidirectional relay based on joint transceiver beamforming

A one-way relay and beamforming technology, applied in electrical components, orthogonal multiplexing systems, multiplexing communication, etc., can solve the problem that the algorithm does not consider the error performance of the receiving end

Inactive Publication Date: 2019-03-05
BEIJING UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Although the existing algorithms can suppress self-interference signals to a certain extent, they all have their own defects and some algorithms do not consider the bit error performance of the receiver.

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  • Self-interference suppression method for full-duplex unidirectional relay based on joint transceiver beamforming
  • Self-interference suppression method for full-duplex unidirectional relay based on joint transceiver beamforming
  • Self-interference suppression method for full-duplex unidirectional relay based on joint transceiver beamforming

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] The method flow chart described in the present invention is as figure 1 shown, including the following steps:

[0048] Step 1. Establish a full-duplex multi-antenna one-way relay system model without direct links.

[0049] build a by n S The half-duplex source node of the root antenna, n D The half-duplex sink node of the root antenna and a node containing n R root receiving antenna and n T A two-hop cooperative communication system composed of full-duplex unidirectional relay nodes with the root transmitting antenna, the model is as follows figure 2 shown. Its mathematical model can be expressed as: uplink y(t)=H UP x(t)+H L x L (t)+n R (t), downlink r(t)=H D x L (t)+n D (t). Uplink channel matrix H UP , downlink channel matrix H D and the self-interference channel matrix H L The elements of are independent and identically dist...

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Abstract

The invention relates to a joint transceiving beamforming-based full-duplex one-way relay self-interference suppression method. Firstly, a full-duplex multi-antenna one-way relay system model not containing a direct communication link is built, then the performance and defects of an existing self-interference suppression algorithm are analyzed, and according to defects of the existing algorithm, the joint transceiving beamforming-based full-duplex one-way relay self-interference suppression method is provided. Firstly, a mathematical expression of a signal to interference noise ratio received by a relay node is determined according to a transceiving beamforming principle and a system model; then a transceiving beamforming vector of each node is estimated by using a singular value decomposition algorithm and a joint transceiving maximum ratio beamforming optimization policy, so that the signal interference noise ratio of a relay receiving end is close to a maximum; and the finally obtained transceiving beamforming vector is an optimal transceiving vector. The method effectively suppresses the effect of the self-interference signal of the full-duplex one-way relay receiving end, improves the errored bit performance of the system, and acquires high robustness.

Description

technical field [0001] The invention relates to a full-duplex one-way relay self-interference suppression method based on joint transceiver beamforming, and belongs to the technical field of system signal processing. Background technique [0002] The traditional half-duplex multi-antenna one-way relay (one-way relay) is widely used as a key technology of cooperative communication. It can not only expand the coverage area of ​​communication, but also improve the reliability of communication link. However, with the continuous improvement of user demands, limited spectrum resources can no longer meet the huge communication traffic. Therefore, people began to study more methods to increase the utilization of spectrum resources. Among them, the full-duplex (full-duplex) working mode at the same time and the same frequency can effectively reduce the pressure brought by the shortage of spectrum resources, thereby improving the frequency spectrum. utilization rate. [0003] As th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J11/00
CPCH04J11/0023H04J11/0026
Inventor 张延华杨旭月杨睿哲孙艳华吴文君
Owner BEIJING UNIV OF TECH