| 一种OFDMA实时子载波分配算法及仿真 |
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| 引用本文： | 曹红梅,张涛.一种OFDMA实时子载波分配算法及仿真[J].电子科技,2007(8):35-38. |
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| 作者姓名： | 曹红梅 张涛 |
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| 作者单位： | 1. 西安邮电学院,电信系,陕西,西安,710061
2. 大唐移动通信设备有限公司,西安分公司,陕西,西安,710075 |
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| 摘 要： | 正交频分多址(OFDMA)是以OFDM调制为基础的新一代无线接入技术,在这种方式中,多址是通过给每个用户分配可用子载波总数的一部分来实现的。介绍了一种OFDMA下行链路的实时动态子载波分配算法,算法根据各个子载波对各个用户的瞬时信道增益,在使系统总的发送功率最小的准则下,为各用户分配最优的子载波组。最后用MATLAB语言仿真实现了该算法.仿真结果表明该算法性能要优于传统的静态子信道方案。
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| 关 键 词： | OFDM OFDMA 子载波分配 试探算法 IEEE 802．16a |
| 收稿时间： | 2006-12-11 |
| 修稿时间： | 2006年12月11 |
A Real-Time OFDMA Sub-Carrier Allocation Algorithm and Its Simulation |
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| Gao Hongmei,Zhang Tao.A Real-Time OFDMA Sub-Carrier Allocation Algorithm and Its Simulation[J].Electronic Science and Technology,2007(8):35-38. |
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| Authors: | Gao Hongmei Zhang Tao |
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| Abstract: | Orthogonal frequency division multiple access(OFDMA)is a new wireless access technology based on OFDM,which realizes multiple access by providing each user with a fraction of the available number of subcarriers.This paper introduces a real-time dynamic sub-carrier distribution algorithm for OFDMA downlink transmission.Knowing the channel characteristics of all the users at the base station,the sub-carrier allocation algorithm assigns subcarriers to the users in such a way that the total transmit power is minimized.Fi- nally the algorithm is simulated using MATLAB and the result indicates that the performance of the proposed al- gorithm is better than conventional static subchannel scheme. |
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| Keywords: | OFDM OFDMA sub-carrier allocation heuristic algorithm IEEE 802 16a |
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