Component-channel-power allocation method of multi-user orthogonal frequency division multiplexing (OFDM) system

A sub-channel, multi-user technology, applied in the field of communication, to achieve the effect of reducing the complexity of the algorithm

Inactive Publication Date: 2015-03-11
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to reduce the computational complexity under the premise of maximizing the capacity of the OFDM system, so that the ratio of the user rate is fair when the power allocation is full

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  • Component-channel-power allocation method of multi-user orthogonal frequency division multiplexing (OFDM) system
  • Component-channel-power allocation method of multi-user orthogonal frequency division multiplexing (OFDM) system
  • Component-channel-power allocation method of multi-user orthogonal frequency division multiplexing (OFDM) system

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[0044] 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.

[0045] The present invention adopts a dynamic resource allocation scheme, sets the rate ratio between users according to the service demands of different users at different times, and dynamically sets subchannel and power allocation schemes according to channel environment changes, so as to realize dynamic allocation of resources.

[0046] The present invention proposes a new method for realizing user proportion fairness and maximizing system capacity—subchannel-power allocation scheme. In the case of ensuring the lowest user rate and equal power allocation, the sub-channel allocation is performed first to maximize the capacity of the OFDM system, and then on the basis of ...

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Abstract

The invention discloses a component channel-power allocation method of a multi-user orthogonal frequency division multiplexing (OFDM) system. Firstly, the OFDM system detects rate ratio of a user channel. Power of the OFDM system is evenly distributed to component channels, the component channels are distributed to users according to genetic algorithm, and the power is distributed for the second time according to the rate ratio. The method meets requirements of maximum system capacity and proportional fairness of the users, and lowers complexity of the algorithm.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a subchannel-power allocation method of a multi-user OFDM system. Background technique [0002] Orthogonal frequency division multiplexing (OFDM) technology is a key technology discussed in depth in the fourth generation mobile communication system. It has attracted more and more attention due to its effective anti-multipath interference characteristics. The basic idea is to use The bandwidth is divided into N orthogonal sub-channels. At the same time, resource allocation related to OFDM systems has also become a research hotspot. Static resource allocation and dynamic resource allocation are two strategies in current resource allocation methods. The idea of ​​static resource allocation is to allocate fixed sub-channels and power to users, but it does not consider channel environment factors to make more reasonable use of effective system resources. On the contrary, the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04W52/34H04W72/04
Inventor 贾越李巍海俎云霄侯宾陈自强刘刚李喆高婧宋梅钟昕城郑建涛
Owner BEIJING UNIV OF POSTS & TELECOMM
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