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Orthogonal frequency division multiple access downlink physical layer communication for IEEE 802.16-2009 standard

机译：IEEE 802.16-2009标准的正交频分多址下行链路物理层通信

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摘要

Worldwide interoperability for microwave access (WiMAX) is a wireless broadband technology, which supports point to multi-point (PMP) broadband wireless access. WiMAX is basically a new shorthand term for IEEE Standard 802.16. This standard determines the air interface, including the medium access control layer and physical layer (PHY), of consolidated fixed and mobile point to-multipoint broadband wireless access frameworks offering numerous services. WiMAX PHY incorporates orthogonal frequency division multiplexing/orthogonal frequency division multiple access (OFDM/OFDMA) as the modulation technique in uplink as well as downlink. Hence, this study addresses OFDMA basics, OFDMA frame structure, OFDMA symbol, OFDMA PHY as per IEEE 802.16e-2009 standard. It also explains OFDMA time-division duplexing frame which consists of partial usage of subchannels and adaptive modulation and coding zones in the downlink from base station to two mobile stations (MS). The author analysed the system performance by reconfiguring different channels such as additive white Gaussian noise (AWGN), flat fading channel and multipath fading or frequency-selective channels. The impact of each channel on received signals (MS 1 and MS 2) is shown in figures and the corresponding values are noted in a table.
机译：微波访问（WiMAX）的全球互操作性是一种无线宽带技术，它支持点对多点（PMP）宽带无线访问。 WiMAX基本上是IEEE标准802.16的新缩写。该标准确定了提供大量服务的固定和移动点对多点宽带无线接入框架的空中接口，包括媒体访问控制层和物理层（PHY）。 WiMAX PHY在上行链路和下行链路中均采用正交频分复用/正交频分多址（OFDM / OFDMA）作为调制技术。因此，此研究解决了IEEE 802.16e-2009标准所规定的OFDMA基础知识，OFDMA帧结构，OFDMA符号，OFDMA PHY。它还说明了OFDMA时分双工帧，该帧由子信道的部分使用以及从基站到两个移动台（MS）的下行链路中的自适应调制和编码区组成。作者通过重新配置不同的信道（例如加性高斯白噪声（AWGN），平坦衰落信道和多径衰落或频率选择信道）来分析系统性能。图中显示了每个通道对接收信号（MS 1和MS 2）的影响，并在表中列出了相应的值。

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