公开(公告)号：US08125934B2

公开(公告)日：2012-02-28

申请号：US12264950

申请日：2008-11-05

申请人： Sean B. Simmons ,  Zoltan Kemenczy

发明人： Sean B. Simmons ,  Zoltan Kemenczy

IPC分类号： H04B3/20

CPC分类号： H04J3/0608 ,  H04L7/0083 ,  H04L7/042

摘要： A system and method for detecting a synchronization (sync) signal in a communication signal are disclosed. A received communication signal is stored in a memory and portions thereof are read from the memory and monitored to detect the sync signal. When a detected sync signal is determined to be invalid, previously read portions of the received communication signal, preferably beginning at a portion of the received signal immediately after a start of the detected sync signal, are again read and monitored to detect the sync signal. Such reading and monitoring of previously read portions of a received signal provide for recovery from so-called false triggering based on invalid sync signals.

摘要翻译： 公开了一种用于检测通信信号中的同步（同步）信号的系统和方法。 接收到的通信信号被存储在存储器中，并且其部分从存储器读取并被监控以检测同步信号。 当检测到的同步信号被确定为无效时，再次读取和监视接收到的通信信号的预先读取的部分，优选地在接收到的信号的一部分开始于检测到的同步信号的开始之后，检测同步信号。 对接收信号的先前读取的部分的这种读取和监视提供了基于无效同步信号从所谓的错误触发的恢复。

公开(公告)号：US20100111001A1

公开(公告)日：2010-05-06

申请号：US12264950

申请日：2008-11-05

申请人： Sean B. Simmons ,  Zoltan Kemenczy

发明人： Sean B. Simmons ,  Zoltan Kemenczy

IPC分类号： H04W56/00

CPC分类号： H04J3/0608 ,  H04L7/0083 ,  H04L7/042

摘要： A system and method for detecting a synchronization (sync) signal in a communication signal are disclosed. A received communication signal is stored in a memory and portions thereof are read from the memory and monitored to detect the sync signal. When a detected sync signal is determined to be invalid, previously read portions of the received communication signal, preferably beginning at a portion of the received signal immediately after a start of the detected sync signal, are again read and monitored to detect the sync signal. Such reading and monitoring of previously read portions of a received signal provide for recovery from so-called false triggering based on invalid sync signals.

摘要翻译： 公开了一种用于检测通信信号中的同步（同步）信号的系统和方法。 接收到的通信信号被存储在存储器中，并且其部分从存储器读取并被监控以检测同步信号。 当检测到的同步信号被确定为无效时，再次读取和监视接收到的通信信号的预先读取的部分，优选地在接收到的信号的一部分开始于检测到的同步信号的开始之后，检测同步信号。 对接收信号的先前读取的部分的这种读取和监视提供了基于无效同步信号从所谓的错误触发的恢复。

公开(公告)号：US07623605B2

公开(公告)日：2009-11-24

申请号：US11464542

申请日：2006-08-15

申请人： Huan Wu ,  Sean Simmons ,  Zoltan Kemenczy

发明人： Huan Wu ,  Sean Simmons ,  Zoltan Kemenczy

IPC分类号： H04B1/10

CPC分类号： H04L25/0228 ,  H04B7/0891 ,  H04L1/06

摘要： An interference cancelling matched filter (ICMF) may include an antenna array for receiving a signal burst including a training sequence therein, and an adaptive space-time filter connected to the virtual antenna array and having settable filter coefficients. The ICMF may further include a channel impulse response estimator for estimating a channel impulse response based upon the training sequence, and a signal blocker operatively connected between the channel impulse response estimator and the adaptive space-time filter so that the filter coefficients thereof are set based upon the training sequence and not the whole signal burst.

摘要翻译： 干扰消除匹配滤波器（ICMF）可以包括用于接收包括其中的训练序列的信号突发的天线阵列和连接到虚拟天线阵列并具有可设置的滤波器系数的自适应时空滤波器。 ICMF还可以包括用于基于训练序列估计信道脉冲响应的信道脉冲响应估计器，以及可操作地连接在信道脉冲响应估计器和自适应空时滤波器之间的信号阻塞器，使得其滤波器系数基于 在训练序列上而不是整个信号突发。

公开(公告)号：US07590197B2

公开(公告)日：2009-09-15

申请号：US11311178

申请日：2005-12-20

申请人： Sean Simmons ,  Huan Wu ,  Zoltan Kemenczy

发明人： Sean Simmons ,  Huan Wu ,  Zoltan Kemenczy

IPC分类号： H04L27/06 ,  H03M13/03

CPC分类号： H04L25/03171 ,  H04L25/03318

摘要： A receiver for a mobile communication system includes a channel equalizer for receiving a burst and generating a soft decision output associated with the burst, a soft decision correction circuit follows the channel equalizer and a decoder receives and decodes a block of bursts. The soft decision correction circuit calculates a correction factor based on the soft decision output for the burst and applies the correction factor to the burst prior to the burst entering the decoder.

摘要翻译： 用于移动通信系统的接收机包括：信道均衡器，用于接收脉冲串并产生与脉冲串相关联的软判决输出，软判决校正电路跟随信道均衡器，并且解码器接收和解码突发块。 软决策校正电路基于脉冲串的软判决输出来计算校正因子，并在脉冲串进入解码器之前将校正因子应用于脉冲串。

公开(公告)号：US07471937B2

公开(公告)日：2008-12-30

申请号：US11183681

申请日：2005-07-18

申请人： Sean B. Simmons ,  Zoltan Kemenczy

发明人： Sean B. Simmons ,  Zoltan Kemenczy

IPC分类号： H04B1/18

CPC分类号： H04L27/0014 ,  H04L2027/0028 ,  H04L2027/0055

摘要： A system and method for inverting automatic frequency control applied to a reference signal used to process an input signal is disclosed. When receiving an input communication signal, a receiver controls the frequency of the reference signal to compensate for frequency differences between a transmitter and a local oscillator in the receiver. The frequency control applied to the reference signal causes frequency variations in a resultant processed signal when the input signal is processed using the reference signal. The frequency of a second reference signal is controlled such that further processing of the resultant processed signal removed effects of the frequency control applied to the reference signal. The processing which applies frequency control to the reference signal is performed in real time while the inversion process is performed in a separate processing section.

摘要翻译： 公开了一种用于反转应用于用于处理输入信号的参考信号的自动频率控制的系统和方法。 当接收到输入通信信号时，接收机控制参考信号的频率以补偿接收机中的发射机和本地振荡器之间的频率差。 当使用参考信号处理输入信号时，施加到参考信号的频率控制导致所得到的处理信号中的频率变化。 控制第二参考信号的频率使得所得到的处理信号的进一步处理去除了施加到参考信号的频率控制的影响。 当在单独的处理部分中执行反转处理时，实时地执行对参考信号的频率控制的处理。

公开(公告)号：US20070237268A1

公开(公告)日：2007-10-11

申请号：US11398043

申请日：2006-04-05

申请人： Huan Wu ,  Sean Simmons ,  Zoltan Kemenczy

发明人： Huan Wu ,  Sean Simmons ,  Zoltan Kemenczy

IPC分类号： H04L27/06

CPC分类号： H04L25/0212 ,  H04L25/0226 ,  H04L25/025 ,  H04L2025/03624

摘要： A receiver and associated method estimates a channel impulse response of the communications signal. A communications signal is received as a burst of transmitted symbols, including a known training sequence. The joint estimation of timing offset and initial channel impulse response is determined based on the cross-correlations of the known transmitted symbols and received communications signal. A constant modulus interference removal iteration is applied to improve the initial channel impulse estimation.

摘要翻译： 接收机和相关方法估计通信信号的信道脉冲响应。 通信信号被接收为发射符号的脉冲串，包括已知的训练序列。 基于已知发送符号和接收到的通信信号的互相关来确定定时偏移和初始信道脉冲响应的联合估计。 应用恒模干涉去除迭代来改善初始信道脉冲估计。

公开(公告)号：US20070133814A1

公开(公告)日：2007-06-14

申请号：US11464242

申请日：2006-08-14

申请人： Huan Wu ,  Sean Simmons ,  Zoltan Kemenczy

发明人： Huan Wu ,  Sean Simmons ,  Zoltan Kemenczy

IPC分类号： A61F11/06

CPC分类号： H04B7/0891 ,  H04B7/0845 ,  H04L1/0631 ,  H04L25/03006 ,  H04L2025/03426 ,  H04L2025/03605

摘要： A filter for reducing co-channel interference within a communications receiver may include a multi-channel, space-time filter circuit that filters n signal parts that have been split from a communications signal by jointly estimating space-time filter weights and multi-channel impulse responses (CIRs) based upon Cholesky and eigenvalue decompositions. The filter may further include a multi-channel, matched filter circuit that receives multi-channel signals from the multi-channel, space-time filter circuit and has a filter response that is provided by a channel impulse response estimation from the space-time filter circuit

摘要翻译： 用于减少通信接收机内的同信道干扰的滤波器可以包括多信道空时滤波器电路，其通过联合估计空时滤波器权重和多信道脉冲来对通信信号分离的n个信号部分进行滤波 响应（CIR）基于Cholesky和特征值分解。 滤波器还可以包括多信道匹配滤波器电路，其从多信道时空滤波器电路接收多信道信号，并且具有由来自空时滤波器的信道脉冲响应估计提供的滤波器响应 电路

公开(公告)号：US07062243B2

公开(公告)日：2006-06-13

申请号：US10651893

申请日：2003-08-29

申请人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

发明人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

IPC分类号： H04B1/06 ,  H04B7/00

CPC分类号： H04W52/52 ,  H03D7/00 ,  H03G3/001 ,  H03G3/3052 ,  H04B1/30 ,  H04L25/06 ,  H04L27/3809

摘要： An automatic gain control (AGC) and DC estimation and correction technique for wireless communication devices is provided. An AGC signal, which controls a gain applied to a received signal by a gain stage to generate a scaled signal, is assigned one of a relatively small number of values in accordance with the amplitude of the scaled signal. An estimate of a DC offset in the scaled signal corresponding to each value of the AGC signal is stored in a memory. A DC estimation arrangement then reads the stored estimate associated with the particular value of the AGC signal from the memory and generates a current DC estimate based thereon. The current estimate is then used to correct the scaled signal for DC offset and to update the stored estimate.

公开(公告)号：US06920190B2

公开(公告)日：2005-07-19

申请号：US09990553

申请日：2001-11-21

申请人： Sean B. Simmons ,  Zoltan Kemenczy

发明人： Sean B. Simmons ,  Zoltan Kemenczy

IPC分类号： H03L7/07 ,  H04B1/18 ,  H04L27/00 ,  H04L27/06 ,  H04L7/00

CPC分类号： H04L27/0014 ,  H04L2027/0028 ,  H04L2027/0055

摘要： A system and method for inverting automatic frequency control applied to a reference signal used to process an input signal is disclosed. When receiving an input communication signal, a receiver controls the frequency of the reference signal to compensate for frequency differences between a transmitter and a local oscillator in the receiver. The frequency control applied to the reference signal causes frequency variations in a resultant signal processed signal when the input signal is processed using the reference signal. The frequency of a second reference signal is controlled such that further processing of the resultant processed signal removes effects of the frequency control applied to the reference signal. The processing which applies frequency control to the reference signal is performed in real time while the inversion process is performed in a separate processing section.

摘要翻译： 公开了一种用于反转应用于用于处理输入信号的参考信号的自动频率控制的系统和方法。 当接收到输入通信信号时，接收机控制参考信号的频率以补偿接收机中的发射机和本地振荡器之间的频率差。 当使用参考信号处理输入信号时，施加到参考信号的频率控制导致所得到的信号处理信号中的频率变化。 控制第二参考信号的频率使得所得到的处理信号的进一步处理去除了施加到参考信号的频率控制的影响。 当在单独的处理部分中执行反转处理时，实时地执行对参考信号的频率控制的处理。

公开(公告)号：US07970078B2

公开(公告)日：2011-06-28

申请号：US12686453

申请日：2010-01-13

申请人： Huan Wu ,  Sean Simmons ,  Zoltan Kemenczy

发明人： Huan Wu ,  Sean Simmons ,  Zoltan Kemenczy

IPC分类号： H04L27/00 ,  H04L25/08 ,  H04B1/10

CPC分类号： H04L25/0212 ,  H04L25/0226 ,  H04L25/025 ,  H04L2025/03624

摘要： A receiver and associated method estimates a channel impulse response of the communications signal. A communications signal is received as a burst of transmitted symbols, including a known training sequence. The joint estimation of timing offset and initial channel impulse response is determined based on the cross-correlations of the known transmitted symbols and received communications signal. A constant modulus interference removal iteration is applied to improve the initial channel impulse estimation.

摘要翻译： 接收机和相关联的方法估计通信信号的信道脉冲响应。 通信信号被接收为发射符号的脉冲串，包括已知的训练序列。 基于已知发送符号和接收到的通信信号的互相关来确定定时偏移和初始信道脉冲响应的联合估计。 应用恒模干涉去除迭代来改善初始信道脉冲估计。