Cognitive SIMO (Single Input Multiple Output) network access method on basis of cooperative relay

一种网络接入、协同中继的技术，应用在认知无线电领域，能够解决通信差、接入难等问题，达到大范围的网络覆盖、提高频谱利用率的效果

Active Publication Date: 2012-02-15
PLA UNIV OF SCI & TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a new method for the uplink of a multi-antenna cognitive network, that is, a cognitive SIMO network, to solve the problems of difficult access and poor communication in the existing way of cognitive radio access to authorized frequency bands. Access Scheme Based on Cooperative Relay

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  • Cognitive SIMO (Single Input Multiple Output) network access method on basis of cooperative relay
  • Cognitive SIMO (Single Input Multiple Output) network access method on basis of cooperative relay
  • Cognitive SIMO (Single Input Multiple Output) network access method on basis of cooperative relay

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[0024] A specific example of the present invention is described as follows, the system simulation adopts MatLab simulation, and the parameter setting does not affect the generality. The primary user system includes a single-antenna transmitter and a single-antenna receiver, and the receivers are randomly distributed on a circle with the transmitter as the center and a radius of 200m; the cognitive network includes a multi-antenna The antenna's cognitive base station and 3 cognitive users are randomly and evenly distributed on a circle with the base station as the center and a radius of 200m. The large-scale path loss of the channel is modeled by the logarithmic path loss model, and the loss factor is set to 4; the small-scale fading of the channel is modeled by the Rayleigh fading model with an average value of 1; the noise power at the receiver is set to The transmit power of the primary user transmitter is 0dBm; the three cognitive users have the same peak transmit power p ...

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Abstract

The invention relates to a cognitive SIMO (Single Input Multiple Output) network access method on the basis of a cooperative relay, which comprises the following steps of: cognizing channel response in a base station collecting network; judging whether a cognitive user can cooperate with a master user to carry out communication so as to achieve a target transmission rate required by the master user; if the cognitive user can cooperate with the master user to carry out communication, cognizing that an SIMO network is accessed into an authorized frequency band of the master user; and if the cognitive user cannot cooperate with the master user to carry out communication, ensuring the SIMO network not to be accessed into the authorized frequency band of the master user. The access mode can ensure a plurality of cognitive users and the master user to simultaneously use the same authorized frequency spectrum to carry out communication at the same geographical position on the premise of ensuring the target transmission rate of the master user, so that the utilization rate of the frequency spectrum is improved as further as possible. The access mode is on the basis of the cognitive communication, so the shorter the distance between a cognition network and a master user network is, the higher the network throughput which can be achieved by the access mode is. Moreover, the large-range network covering can be realized and the defects of the existing cognitive radio access mode are overcome.

Description

technical field [0001] The present invention belongs to the technical field of cognitive radio, specifically a new cooperative relay-based cognitive radio access method applied in a cognitive single-input multiple-output (Single-Input Multiple-Output, referred to as SIMO) network . Background technique [0002] Cognitive radio is one of the most popular wireless technologies at present. Its emergence has changed the way spectrum resources are exclusively used by authorized users. Cognitive users with cognitive radio functions can control the wireless communication environment in which they work. Interactive sensing can automatically change its own sending and receiving parameters, and dynamically reuse the authorized frequency band under the premise of ensuring the normal communication of authorized users (primary users), thereby significantly improving spectrum utilization. In addition, multi-antenna is recognized as one of the necessary technical solutions for future high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00H04B7/04H04B17/00
CPCH04B7/026H04W72/541
Inventor 吴启晖王金龙杨旸张玉明
Owner PLA UNIV OF SCI & TECH
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