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Robust wave beam forming method in multi-antenna multi-user relay cognitive radio network

A cognitive radio and beamforming technology, applied in diversity/multi-antenna systems, network planning, wireless communications, etc., to achieve the effects of expanding system stability and application range, optimizing throughput, and improving system stability and application range

Inactive Publication Date: 2013-01-23
TSINGHUA UNIV +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: how to optimize the throughput of a relay-based multi-antenna multi-user cognitive radio network through robust beamforming design when the channel information is not completely known

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  • Robust wave beam forming method in multi-antenna multi-user relay cognitive radio network
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  • Robust wave beam forming method in multi-antenna multi-user relay cognitive radio network

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] figure 1 The network signal structure diagram of the specific implementation of the present invention is given in , in which the multi-antenna multi-user relay cognitive radio network includes a base station (also called a cognitive base station) and a relay node (also called a relay, a cognitive known relay) and K receiving end user nodes, all of them are multi-antenna nodes, and the number of their antennas is set to M b , M r , M k (k=1,2,...,K); the same primary user system in the cognitive radio network simultaneously accesses the licensed frequency band owned by the primary user system through spectrum sharing, and the primary user system has multi-antenna ...

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Abstract

The invention discloses a robust wave beam forming method in a multi-antenna multi-user relay cognitive radio network, relating to the technical field of wireless communication. Aiming at the condition that the cognitive radio network channel information has uncertainty, a robust linear wave beam forming method of a cognitive base station and a cognitive relay is designed, interference from or to a main user is suppressed and eliminated, and maximization of weighting rate of a plurality of receiving end users in the cognitive radio network under the most severe condition of the channel is ensured. The invention has the advantages and the characteristics that aiming at a relay-based multi-user multi-antenna complex cognitive communication network that has uncertainty of channel information, the method can be used for effectively simplifying the complex problem needing being solved into a problem capable of being rapidly calculated, therefore, a wave beam forming parameter is rapidly designed, and optimal communication is realized by the relay-based multi-user multi-antenna cognitive radio network under the condition that channel information is incompletely known.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a robust beamforming method in a multi-antenna multi-user relay cognitive radio network. Background technique [0002] Cognitive radio technology is considered to be a wireless communication method that can effectively solve the problem of scarcity of frequency resources. The reason for this is that the current static communication spectrum resource division pattern leads to a contradiction between the limited spectrum resources and the new wireless communication business demand on the one hand, and on the other hand, the static spectrum division leads to a high idle rate of many allocated frequency bands in practical applications. . Urged by the shortage of spectrum resources and low frequency utilization, cognitive radio technology emerged as the times require. Its goal is to construct a network that can dynamically access the existing authorized users (...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04W16/18H04B7/04
Inventor 栾天祥高飞飞李朝峰雷鸣
Owner TSINGHUA UNIV
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