公开(公告)号：US20090041107A1

公开(公告)日：2009-02-12

申请号：US12287203

申请日：2008-10-07

申请人： Naofal Al-Dhahir ,  Ali H. Sayed

发明人： Naofal Al-Dhahir ,  Ali H. Sayed

IPC分类号： H04L27/01

CPC分类号： H04L25/03057 ,  H04B1/7103 ,  H04B1/71075 ,  H04B1/712 ,  H04B7/04 ,  H04L2025/03375 ,  H04L2025/03426 ,  H04L2025/0349 ,  H04L2025/03605

摘要： A MIMO Decision Feedback Equalizer improves operation of a receiver by canceling the spatio-temporal interference effects caused by the MIMO channel memory with a set of FIR filters in both the feed-forward and the feedback MIMO filters. The coefficients of these FIR filters can be fashioned to provide a variety of controls by the designer.

摘要翻译： MIMO判决反馈均衡器通过在前馈和反馈MIMO滤波器中利用一组FIR滤波器消除由MIMO信道存储器引起的空间 - 时间干扰效应来改善接收机的操作。 这些FIR滤波器的系数可以被设计成为设计者提供各种控制。

公开(公告)号：US07027536B1

公开(公告)日：2006-04-11

申请号：US09668199

申请日：2000-09-22

申请人： Naofal Al-Dhahir

发明人： Naofal Al-Dhahir

IPC分类号： H04B7/10 ,  H03D1/00 ,  H03H7/30

CPC分类号： H04B1/58 ,  H04B7/0413

摘要： A multi-input, multi-output pre-filter improves operation of a multi-input receiver by shortening the effective memory of the channel with a set of FIR filters. The coefficients of these FIR filters can be fashioned to provide a variety of controls by the designer, for example, the value of the effective memory.

公开(公告)号：US06959047B1

公开(公告)日：2005-10-25

申请号：US09956648

申请日：2001-09-20

申请人： Naofal Al-Dhahir ,  Christine Fragouli ,  William Turin

发明人： Naofal Al-Dhahir ,  Christine Fragouli ,  William Turin

IPC分类号： H04B7/02 ,  H04B7/08 ,  H04L1/00 ,  H04L1/02 ,  H04L1/06 ,  H04L25/02 ,  H04L25/03 ,  H04L25/08

CPC分类号： H04B7/0684 ,  H04B7/0669 ,  H04B7/0848 ,  H04B7/0851 ,  H04B7/0854 ,  H04B7/0882 ,  H04L1/0618 ,  H04L25/0204 ,  H04L25/03006

摘要： The burden of designing multiple training sequences for systems having multiple transmit antennas, is drastically reduced by employing a single sequence from which the necessary multiple sequences are developed. The single sequence is selected to create sequences that have an impulse-like autocorrelation function and zero cross correlations. A sequence of any desired length Nt can be realized for an arbitrary number of channel taps, L. The created sequences can be restricted to a standard constellation (that is used in transmitting information symbols) so that a common constellation mapper is used for both the information signals and the training sequence. In some applications a a training sequence may be selected so that it is encoded with the same encoder that is used for encoding information symbols. Both block and trellis coding is possible in embodiments that employ this approach.

摘要翻译： 为具有多个发射天线的系统设计多个训练序列的负担通过采用从其开发必需的多个序列的单个序列而大大降低。 选择单个序列以创建具有脉冲状自相关函数和零交叉相关的序列。 可以为任意数量的信道抽头L实现任何期望长度N t的序列。所创建的序列可以被限制为标准星座（用于发送信息符号），使得 公共星座映射器用于信息信号和训练序列。 在一些应用中，可以选择训练序列，使得它用与用于对信息符号进行编码的相同编码器进行编码。 在采用这种方法的实施例中，块和网格编码都是可能的。

公开(公告)号：US06480151B2

公开(公告)日：2002-11-12

申请号：US10035676

申请日：2001-12-28

申请人： Khalil J. Maalouf ,  Jeffrey M. Ashe ,  Naofal Al-Dhahir

发明人： Khalil J. Maalouf ,  Jeffrey M. Ashe ,  Naofal Al-Dhahir

IPC分类号： H04B7185

CPC分类号： H04L25/03044 ,  H04L1/06 ,  H04L2025/03509

摘要： Interference in a GPS receiver in minimized while preserving the GPS satellite signal in a system having N antenna elements for receiving the interference signal and the satellite signal and multiple tapped delay line structures connected to the antenna elements for filtering the signals received by the antenna elements based a plurality of filter coefficients. The filter coefficients are determined such that the plurality of filter coefficients equals R{tilde over (xx)}−1C[CHR{tilde over (xx)}−1C]−1F wherein CH{tilde over (w)}=F, where {tilde over (w)} equals the plurality of filter coefficients, R{tilde over (xx)} equals a covariance matrix, and C and F are determined to preserve a frequency spectrum of the GPS satellite signal.

摘要翻译： 在具有用于接收干扰信号的N个天线元件和卫星信号的系统中保持GPS卫星信号以及连接到天线元件的多个抽头延迟线结构以便对由天线元件接收的信号进行滤波的同时在GPS接收机中的干扰最小化 多个滤波器系数。 滤波器系数被确定为使得多个滤波器系数等于Rxx-1C [CHRxx-1C] -1F，其中CHw = F，其中w等于多个滤波器系数，Rxx等于协方差矩阵，并且C和F被确定为 保存GPS卫星信号的频谱。