公开(公告)号：US20110286559A1

公开(公告)日：2011-11-24

申请号：US13146818

申请日：2009-01-28

申请人： Ying Peng ,  Simon Armour ,  Joe Mcgeehan ,  Tomoyoshi Yokota ,  Fangwei Tong

发明人： Ying Peng ,  Simon Armour ,  Joe Mcgeehan ,  Tomoyoshi Yokota ,  Fangwei Tong

IPC分类号： H04L25/08

CPC分类号： H04L27/2657 ,  H04L25/022 ,  H04L25/03159 ,  H04L27/2695 ,  H04L2025/03426

摘要： There is provided a first device for use in a communication system, the communication system further comprising a plurality of second devices divided into a plurality of groups, the system having a plurality of orthogonal frequency carriers available for transmissions, each second device having a respective carrier frequency offset estimated from signals received from the first device, each of the second devices transmitting a respective stream of symbols using the respective estimated carrier frequency offset and one or more frequency carriers selected from the plurality of orthogonal frequency carriers, the first device comprising receiver circuitry for receiving respective signals from each of the second devices; a channel estimator for generating, from the received signals, an estimate of the channel over which the signals have been transmitted; an interference estimator for generating, from the received signals, an estimate of interference at the first device caused by errors in the carrier frequency offsets estimated by each second device; first circuitry for cancelling interference in the signals received at the first device using the estimate of the interference, the circuitry being configured to cancel interference between second devices within a first one of the plurality of groups; second circuitry for equalising the signals output from the first circuitry using the estimate of the channel; and third circuitry for cancelling interference in the signals output from the second circuitry, the third circuitry being configured to cancel the interference between second devices in a second one of the plurality of groups.

摘要翻译： 提供了一种在通信系统中使用的第一设备，所述通信系统还包括划分成多个组的多个第二设备，所述系统具有可用于传输的多个正交频率载波，每个第二设备具有相应的载波 从所述第一设备接收的信号估计的频率偏移，所述第二设备中的每一个使用相应的估计载波频率偏移和从所述多个正交频率载波中选择的一个或多个频率载波来传送相应的符号流，所述第一设备包括接收机电路 用于从每个第二设备接收相应的信号; 信道估计器，用于从所接收的信号中产生已经发送信号的信道的估计; 干扰估计器，用于从接收到的信号中产生由由每个第二设备估计的载波频率偏移中的误差引起的在第一设备处的干扰的估计; 第一电路，用于使用所述干扰的估计来消除在所述第一设备处接收的信号的干扰，所述电路被配置为消除所述多个组中的第一组内的第二设备之间的干扰; 第二电路，用于使用所述信道的估计来均衡从所述第一电路输出的信号; 以及用于消除从第二电路输出的信号的干扰的第三电路，所述第三电路被配置为消除所述多个组中的第二组中的第二设备之间的干扰。