Method for distributing subcarriers of orthogonal frequency-division multiple access system

Abstract

The invention discloses a method for distributing carriers of an orthogonal frequency-division multiple access system based on a bidirectional poorest channel eliminating method, which mainly solves the problems of failure to dynamically adjust distribution sequence and higher complexity in the prior art. By adopting the scheme, the method comprises the following steps of (1) establishing a channel quality matrix; (2) finding the poorest channel quality from the channel quality matrix; (3) pre-distributing a user and a sub-carrier corresponding to the poorest channel quality, and selecting a subcarrier distribution mode; (4) distributing the subcarriers in a selected mode; (5) utilizing subcarrier distribution information to update a related collection of variables; (6) detecting the related collection to judge whether the distribution of the subcarrier is completed or not; when the distribution of the subcarriers is not completed, repeating from the step (2). The method has the advantages that the communication reliability and the optimum balance of frequency spectrum efficiency are obtained, the higher user communication fairness is guaranteed, the complexity is lower, the practical value is higher, and the method can be used for distributing the frequency spectrum resources in the multi-carrier communication process.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a subcarrier allocation method, which can be used for frequency spectrum resource allocation in multi-carrier communication. Background technique [0002] Orthogonal frequency division multiple access technology OFDMA, as the core access technology in protocols such as LTE and LTE-A, has been widely used in wireless mobile communications. Since OFDMA technology can enable communication systems to obtain higher spectral efficiency and energy efficiency, this multiple access technology will continue to be widely used in 5G mobile communications in the future. However, effective use of spectrum resources, that is, efficient and dynamic allocation of subcarriers, has become a core research hotspot for implementing OFDMA in future communications. [0003] With regard to subcarrier allocation in OFDMA systems, the design goal of most existing researches is to maximiz...

AI Technical Summary

Problems solved by technology

However, the biggest flaw of WSA and other similar methods is that they cannot dynamically adjust the allocation order while ignoring the maximization of the strongest channel

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