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1. 发明授权

US07489731B2 Communication system using OFDM 失效
标题翻译：使用OFDM的通信系统
公开(公告)号：US07489731B2
公开(公告)日：2009-02-10
申请号：US10373427
申请日：2003-02-24
申请人： Alan James Coulson , Chaturanga Pilans Lokuge , Derek Bernard Richardson
发明人： Alan James Coulson , Chaturanga Pilans Lokuge , Derek Bernard Richardson
IPC分类号： H04K1/10
CPC分类号： H04L27/2647
摘要： The OFDM communications system for wireless networks includes at least one transmitter and at least one receiver. Each transmitter includes a signal source, a transmit modulator that arranges the data into packets and appends a pilot symbol of a repeated pseudo random binary sequence to the start of each packet, a multiplexer, an inverse fast Fourier transform, an up-sampler, a digital low pass filter, a digital to analogue converter, and an RF module. Each receiver includes an RF module, an analogue to digital converter, a digital low pass filter, a down-sampler, a frame detector to search for significant pilot symbol correlations and make initial estimates of at least one signal parameter, a digital phase locked loop to remove estimated frequency- and phase-offsets, a fast Fourier transform operator, a linear phase corrector to remove estimated sub-sample timing errors, a decision block, and a demultiplexer.
摘要翻译：用于无线网络的OFDM通信系统包括至少一个发射机和至少一个接收机。每个发射机包括信号源，发送调制器，将数据排列成分组，并将重复的伪随机二进制序列的导频符号附加到每个分组的开头，多路复用器，快速傅立叶反变换，上采样器，数字低通滤波器，数模转换器和RF模块。每个接收机包括RF模块，模数转换器，数字低通滤波器，下采样器，帧检测器，用于搜索有效的导频符号相关，并对至少一个信号参数进行初始估计，数字锁相环去除估计的频率和相位偏移，快速傅里叶变换算子，线性相位校正器以去除估计的子采样定时误差，判决块和解复用器。

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