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OFDMA无线宽带接入系统简介及性能仿真分析

Performance analysis and simulations of OFDMA based BWA
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摘要 为了提高在非可视环境下物理信道的传输质量,克服城市无线信道复杂环境中存在的多径和频率选择性衰落问题,文中介绍了基于OFDM调制的OFDMA宽带多址无线接入技术及OFDMA调制特点,分析了BWA的外部环境、容量和所需解决的问题,以及提高非可视环境下服务质量的策略。802.16协议支持两种OFDM调制系统,一种为简单的OFDM系统,另一种为OFDMA系统。文中重点介绍和分析了OFDMA调制系统的性能,并对其在非视距环境下的应用进行了分析和仿真。 For improving transmission quality of physics channel in NLOS BWA operation environment and solving multi-path and frequency selectivity attenuation in city wireless complex channel environment,the OFDM-based OFDMA BWA and OFDMA modulation specialty are discussed in this paper,and the exterior environment,capacity and problems of BWA and the service strategy for improving quality of NLOS BWA are analyzed also. IEEE 802.16 supports two OFDM systems,one is OFDM,and another is OFDMA. In this paper,we introduce and analyze the performance of OFDMA system,and theoretic analysis and computer simulations are used to assess the performance of NLOS BWA operation environment.
出处 《电力系统通信》 2005年第2期42-44,共3页 Telecommunications for Electric Power System
关键词 正交频分复用 正交频分复用多址接入 无线宽带接入 快速付里叶变换 OFDM OFDMA BWA FFT NLOS(Near Line of Sight)
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参考文献5

  • 1Air Interface for Fixed Broadband Wireless Access Systems Amendment: MediumAccess Control Modifications and Additional Physical Layer Specifications for 2 - 11 GHz [ S ].IEEE Std. 802.16a,2003. 被引量:1
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