OFDM frequency spectrum distributing method by identifying radio network based on interference of receiver

A cognitive radio and spectrum allocation technology, applied in the field of OFDM spectrum allocation of cognitive radio networks based on receiver interference, can solve the problem that the transmitter interference model cannot accurately model the spectrum allocation of cognitive radio networks, and is not accurate enough

Inactive Publication Date: 2008-10-15
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

Therefore, the transmitter interference model cannot accurately model the cognitive radio network spectrum allocation problem
[0005] The traditional graph theory-based OFDM spectrum allocation algorithm for cognitive radio networks [see...

Method used

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  • OFDM frequency spectrum distributing method by identifying radio network based on interference of receiver
  • OFDM frequency spectrum distributing method by identifying radio network based on interference of receiver
  • OFDM frequency spectrum distributing method by identifying radio network based on interference of receiver

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Embodiment Construction

[0045] Under the receiver interference model, the OFDM spectrum allocation method for cognitive radio networks based on graph theory is as follows: figure 1 shown, including the following steps:

[0046] Step (1): Initialize according to the following process:

[0047] (1.1) Determine the system parameters, including the number of primary users M, the number of secondary users N, the number of available channels K, the transmit power matrix P and the signal-to-noise-interference ratio threshold matrix Г

[0048] Suppose the number of first-level users in the cognitive radio network is M, the number of second-level users is N, and each user can select multiple channels for transmission at the same time in the OFDM mode. The serial numbers of the second-level users are 1 to N, and the serial numbers of the first-level users From N+1 to N+M. Assume that the number of available channels is K, and the sequence numbers are 1 to K. User i is connected by a pair of transmitters T at ...

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Abstract

The invention pertains to a spectrum resource management technique in cognitive radio networks, which is an OFDM spectrum allocation method for cognitive radio networks on the basis of receiver interference, comprising the steps of initialization, coloring primary users, carrying out topology updating, calculating tag values and colors to be put on of each secondary user, putting the color on the secondary user with the maximum tag value, etc. The invention discloses an OFDM spectrum allocation method for cognitive radio networks under a receiver interference model on the basis of graph theory, which can accurately model the spectrum allocation for cognitive radio networks and carry out spectrum allocation effectively in cognitive radio networks, and the target of the method of the invention can maximize spectrum efficiency and maximize minimum fairness or maximize proportional fairness. The method disclosed can be realized by in a distributed manner.

Description

technical field [0001] The present invention belongs to spectrum resource management technology in cognitive radio network, relates to cognitive radio network spectrum allocation method, specifically a cognitive radio network OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) based on receiver interference spectrum allocation method. technical background [0002] The intelligent wireless cognitive network can realize the goal of cooperating with surrounding wireless networks by actively sensing the use of wireless spectrum, recognizing the wireless environment, and adaptively reconfiguring network resources, working modes and parameters. Therefore, a new generation of intelligent cognitive wireless networks with cognitive radio capabilities and reconfiguration capabilities has become a research focus. [0003] Cognitive radio network consists of primary users who pre-occupy certain channels and secondary users who choose to use idl...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04L27/26H04B17/382
Inventor 刘干周亮周鑫朱光喜马莉朱旭
Owner HUAZHONG UNIV OF SCI & TECH
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