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Resource allocation method of a multi-user multi-input single-output-orthogonal frequency division multiple access system

An orthogonal frequency division multiple access and resource allocation technology, applied in multi-frequency code systems, electrical components, wireless communications, etc., can solve the problems of system throughput decline and neglect of system throughput, and achieve the effect of ensuring fairness

Inactive Publication Date: 2011-09-28
SOUTH CHINA UNIV OF TECH
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  • Claims
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Problems solved by technology

This algorithm greatly reduces the complexity of the resource allocation problem, but ignores the system throughput in order to ensure a fairly high user fairness, which greatly reduces the system throughput.

Method used

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  • Resource allocation method of a multi-user multi-input single-output-orthogonal frequency division multiple access system
  • Resource allocation method of a multi-user multi-input single-output-orthogonal frequency division multiple access system
  • Resource allocation method of a multi-user multi-input single-output-orthogonal frequency division multiple access system

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Embodiment 1

[0039] Such as figure 1 The shown multi-user MISO-OFDMA system model: the base station installs M antennas, there are K users in the system, and each user installs an antenna. Generally, the number of antennas of the base station is much smaller than the number of system users (Mk，n，t =[h k，n，1 (t)h k，n，2 (t)Λh k，n，M (t)], where h k，n，1 (t)h k，n，2 (t)Λh k，n，M (t) respectively represent the channel gain from the antenna of the kth user to each antenna of the base station.

[0040] The total power constraint of the base station is set to P tot , the present invention takes the total power P tot and N subcarriers are reasonably allocated to K users of the system to achieve the purpose of not only ensuring the throughput of the system but also ensuring the fairness among users.

[0041] The resource allocation method of the multi-user multiple-input single-output-OFDMA system of the present invention is as follows: figure 2 Shown:

[0042] 1), the base station obtains t...

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Abstract

The invention provides a resource allocation method of a multi-user multi-input single-output-orthogonal frequency division multiple access system. The method comprises the following steps of: firstly, allocating total power to all subcarriers; then, serially allocating the resource of each subcarrier, until all the subcarriers are allocated. While allocating the resource of the subcarriers, firstly, a proportion weighting coefficient of users is updated, then, a user subset sharing the current subcarriers and the power allocation among the users in the user subset are obtained through a proportion rate greedy algorithm. In the method provided by the invention, system throughput and user fairness are balanced by setting an appropriate proportion weighting coefficient, and since priority of each user is fully considered while power is allocated for the users, better throughput performance can be obtained while user fairness is ensured.

Description

technical field [0001] The invention relates to the field of mobile communication systems, in particular to a resource allocation method of a multi-user multiple-input single-output-orthogonal frequency division multiple access system. Background technique [0002] In future communication systems, Orthogonal Frequency Division Multiple Access (OFDMA) and Multiple-Input Single-Output (MIMO) have been receiving much attention. OFDMA technology can not only effectively resist multipath interference, but also greatly improve frequency efficiency. MIMO technology can not only provide transmit (receive) power gain through transmit (receive) beamforming, but also provide additional spatial freedom gain to greatly improve system throughput. [0003] Considering the downlink transmission link of a multi-user MISO-OFDMA system, the base station installs multiple transmit antennas, and each user installs a single antenna to form a virtual MIMO situation. Users access the system using...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04L27/26
Inventor 季飞卢伟山余华陈芳炯
Owner SOUTH CHINA UNIV OF TECH
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