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：US20060229044A1

公开(公告)日：2006-10-12

申请号：US11449091

申请日：2006-06-08

申请人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

发明人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

IPC分类号： H04B7/00 ,  H04B1/06

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：US07653369B2

公开(公告)日：2010-01-26

申请号：US11876888

申请日：2007-10-23

申请人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

发明人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

IPC分类号： H04B1/06 ,  H04B1/00 ,  H04L27/08

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

摘要： A wireless communications receiver includes a memory configured to store offset values corresponding to respective gain settings. A gain controller is configured to continuously select one of the gain settings based on amplitude of a received signal. An amplifier is configured to amplify the signal based on the selected gain setting. An offset estimator is configured to determine an updated offset value as a function of both a time-average value of the signal and a previously-stored offset value. The previously stored offset value is an offset value that was stored in the memory at a time prior to the gain controller switching to the currently-selected gain setting from a previously-selected gain setting.

摘要翻译： 无线通信接收机包括被配置为存储对应于相应增益设置的偏移值的存储器。 增益控制器被配置为基于接收信号的幅度连续地选择一个增益设置。 放大器被配置为基于所选择的增益设置来放大信号。 偏移估计器被配置为根据信号的时间平均值和先前存储的偏移值来确定更新的偏移值。 先前存储的偏移值是在增益控制器从先前选择的增益设置切换到当前选择的增益设置之前的时间存储在存储器中的偏移值。

公开(公告)号：US20080043887A1

公开(公告)日：2008-02-21

申请号：US11876888

申请日：2007-10-23

申请人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

发明人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

IPC分类号： H04L27/08

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

摘要： A wireless communications receiver includes a memory configured to store offset values corresponding to respective gain settings. A gain controller is configured to continuously select one of the gain settings based on amplitude of a received signal. An amplifier is configured to amplify the signal based on the selected gain setting. An offset estimator is configured to determine an updated offset value as a function of both a time-average value of the signal and a previously-stored offset value. The previously stored offset value is an offset value that was stored in the memory at a time prior to the gain controller switching to the currently-selected gain setting from a previously-selected gain setting.

摘要翻译： 无线通信接收机包括被配置为存储对应于相应增益设置的偏移值的存储器。 增益控制器被配置为基于接收信号的幅度连续地选择一个增益设置。 放大器被配置为基于所选择的增益设置来放大信号。 偏移估计器被配置为根据信号的时间平均值和先前存储的偏移值来确定更新的偏移值。 先前存储的偏移值是在增益控制器从先前选择的增益设置切换到当前选择的增益设置之前的时间存储在存储器中的偏移值。

公开(公告)号：US07295823B2

公开(公告)日：2007-11-13

申请号：US11449091

申请日：2006-06-08

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.

摘要翻译： 提供了一种用于无线通信设备的自动增益控制（AGC）和DC估计和校正技术。 控制通过增益级施加到接收信号的增益以产生缩放信号的AGC信号根据缩放信号的幅度被分配为相对较小数目的值之一。 对应于AGC信号的每个值的缩放信号中的DC偏移的估计被存储在存储器中。 然后，DC估计装置从存储器读取与AGC信号的特定值相关联的存储估计，并基于此产生当前的DC估计。 然后使用当前估计来校正用于DC偏移的缩放信号并更新存储的估计。

公开(公告)号：US20060269019A1

公开(公告)日：2006-11-30

申请号：US11499292

申请日：2006-08-04

申请人： Sean Simmons ,  Zoltan Kemenczy

发明人： Sean Simmons ,  Zoltan Kemenczy

IPC分类号： H04L27/06 ,  H04L7/06

CPC分类号： H04L7/042

摘要： A synchronization (sync) signal detector and associated method detect the occurrence of a known sync signal in a received signal. The known sync signal is generated and correlated with the received signal to generate a correlation waveform. A peak value of the correlation waveform, indicative of the occurrence of the sync signal in the received signal, is detected and used to determine a timing offset between the received signal and the sync signal. The sync signal is then shifted in time to compensate for the timing offset. Such shifting of the sync signal is simpler and requires substantially less processing time and resources compared to known sync signal detection schemes, in which a received signal or the sampling timing of a received signal is shifted to compensate for timing offset.

公开(公告)号：US20060120499A1

公开(公告)日：2006-06-08

申请号：US11339080

申请日：2006-01-25

申请人： Sean Simmons ,  Zoltan Kemenczy

发明人： Sean Simmons ,  Zoltan Kemenczy

IPC分类号： H04L7/00

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.

公开(公告)号：US06654593B1

公开(公告)日：2003-11-25

申请号：US09699794

申请日：2000-10-30

申请人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

发明人： Sean Simmons ,  Muhammad Dajani ,  Zoltan Kemenczy

IPC分类号： H04B106

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.

摘要翻译： 提供了一种用于无线通信设备的自动增益控制（AGC）和DC估计和校正技术。 控制通过增益级施加到接收信号的增益以产生缩放信号的AGC信号根据缩放信号的幅度被分配为相对较小数量的值之一。 对应于AGC信号的每个值的缩放信号中的DC偏移的估计被存储在存储器中。 然后，DC估计装置从存储器读取与AGC信号的特定值相关联的存储估计，并基于此产生当前的DC估计。 然后使用当前估计来校正用于DC偏移的缩放信号并更新存储的估计。

公开(公告)号：US07826574B2

公开(公告)日：2010-11-02

申请号：US11671284

申请日：2007-02-05

申请人： Huan Wu ,  Sean Simmons

发明人： Huan Wu ,  Sean Simmons

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04L27/0008 ,  H04B7/082 ,  H04B7/0845 ,  H04B7/0848

摘要： Receivers and methods are provided that include multiple modes of processing signals from multiple antennas. These include legacy, SAIC (single antenna interference cancellation) and MSRD. Various methods are provided for selecting an appropriate receiver processing function. These include looking at correlation and gain imbalance between antennas, looking at the processing gain resulting from one or more of the receiver processing functions, and looking at the equalization quality of at least two receiver processing functions.

摘要翻译： 提供了包括来自多个天线的多种处理信号模式的接收机和方法。 这些包括遗留，SAIC（单天线干扰消除）和MSRD。 提供了用于选择适当的接收机处理功能的各种方法。 这些包括观察天线之间的相关性和增益不平衡，观察由一个或多个接收机处理功能产生的处理增益，以及查看至少两个接收机处理功能的均衡质量。

公开(公告)号：US08126099B2

公开(公告)日：2012-02-28

申请号：US11673045

申请日：2007-02-09

申请人： Huan Wu ,  Sean Simmons

发明人： Huan Wu ,  Sean Simmons

IPC分类号： H04B1/10 ,  H04L25/08

CPC分类号： H04L25/0212 ,  H04L25/03299

摘要： Apparatus, and an associated method, for the receive part of a receiving station, such as a mobile station or other transceiver of a cellular communication system. Selection is made of filter characteristics to be exhibited by an adaptive, input noise whitening filter. A noise estimator estimates a noise component of a noise sequence. An autocorrelation estimator estimates the noise-component autocorrelation. A determination is made as to whether the autocorrelation exceeds a threshold. If so, filter characteristics are selected to cause the input noise whitening filter to operate to inject whitening noise into the received sequence.

摘要翻译： 用于接收站（例如蜂窝通信系统的移动台或其他收发器）的接收部分的装置和相关方法。 选择由自适应输入噪声白化滤波器显示的滤波器特性。 噪声估计器估计噪声序列的噪声分量。 自相关估计器估计噪声分量自相关。 确定自相关是否超过阈值。 如果是这样，则选择滤波器特性以使输入噪声白化滤波器工作，以将白化噪声注入接收的序列。