Proportional fairness resource distribution method of cognition OFDM system based on spectrum lining

Abstract

The invention discloses a proportional fairness resource distribution method of a cognition OFDM system based on spectrum lining. The proportional fairness resource distribution method of the cognition OFDM system based on spectrum lining comprises the steps that a cognition base station obtains channel state information needed by resource distribution; the cognition base station carries out proportional fairness resource distribution on the frequency and power resources through a firefly method; the cognition base station initializes the parameters of the firefly method and determines the target function value of fireflies; the relative brightness and attractiveness of the fireflies in a group are determined, and the firefly position where the target function value is the maximum is determined; the spatial position vector of the fireflies is updated; whether the newly generated firefly position meets the limitation conditions is detected, if yes, the next step is carried out, and if not, the last step is carried out again; the detection is repeated and the optimal solution of frequency and power resource distribution is output; the cognition base station informs a cognition user of the resource distribution result. The proportional fairness resource distribution method of the cognition OFDM system based on spectrum lining distributes the resources from the two dimensions of frequency and power according to the proportional fairness principle, and provides technical support for efficiently using wireless resources and improving throughput.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a method for allocating proportionally fair resources in a cognitive OFDM system based on spectrum pads. Background technique [0002] At present, the lack of spectrum resources has seriously restricted the development of wireless communication technology, and cognitive radio technology can effectively solve the problem of lack of spectrum resources. Cognitive radio technology can dynamically use spectrum resources by sensing the wireless spectrum environment and adaptively adjusting transmission parameters, thereby effectively improving spectrum utilization. As a special multi-carrier modulation technology, OFDM technology has strong anti-interference ability and high spectrum utilization efficiency; moreover, multi-user OFDM system dynamic resource allocation technology can adjust subcarrier selection and Power allocation, which can further improve the spectral efficienc...

AI Technical Summary

Problems solved by technology

Both of the above two methods do not consider the fairness requirement of the transmission rate of cognitive users in the cognitive OFDM system based on spectral padding, and cannot meet the requirement that the transmission rate of cognitive users is proportional

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