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公开(公告)号：US20080292004A1
公开(公告)日：2008-11-27
申请号：US11579689
申请日：2005-03-29
IPC分类号： H04L27/06
CPC分类号： H04L27/0014 , H04L2027/0046 , H04L2027/0053 , H04L2027/0067 , H04L2027/0093
摘要： A receiver comprises a demodulator for providing a demodulated signal and a centroid calculator responsive to the demodulated signal for identifying a correct carrier phase for use in the centroid calculation and in removing carrier phase ambiguity in the demodulator. In addition, the centroid calculator may include a limiter.
摘要翻译： 接收机包括用于提供解调信号的解调器和响应于解调信号的质心计算器，用于识别在质心计算中使用的正确载波相位，以及消除解调器中的载波相位模糊度。 另外，重心计算器可以包括限制器。
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公开(公告)号：US07421042B2
公开(公告)日：2008-09-02
申请号：US10536055
申请日：2003-11-12
IPC分类号： H04L27/16
CPC分类号： H04L27/0014 , H04L27/02 , H04L27/066 , H04L2027/0057 , H04L2027/0073 , H04N5/4401
摘要： An ATSC (Advanced Television Systems Committee) VSB (Vestigial Sideband) receiver includes a carrier tracking loop (CTL) for processing a received ATSC VSB signal and a CTL lock detector. The CTL lock detector includes an averaging filter for averaging the down-converted received ATSC VSB signal to provide a DC offset, an estimator for providing an estimate of the DC offset, and a comparator for providing a lock signal as a function of a comparison between the estimate of the DC offset and the DC offset, wherein the lock signal is representative of either a locked condition or an unlocked condition of the CTL.
摘要翻译： ATSC（高级电视系统委员会）VSB（残留边带）接收机包括用于处理所接收的ATSC VSB信号和CTL锁定检测器的载波跟踪环路（CTL）。 CTL锁定检测器包括平均滤波器，用于对经下变频的接收的ATSC VSB信号进行平均以提供DC偏移，用于提供DC偏移的估计的估计器，以及用于提供锁定信号的比较器，作为 DC偏移和DC偏移的估计，其中锁定信号表示CTL的锁定状态或解锁状态。
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公开(公告)号：US20060092330A1
公开(公告)日：2006-05-04
申请号：US10535979
申请日：2003-11-12
CPC分类号： H04L27/0014 , H04L27/02 , H04N5/21 , H04N5/4401
摘要： A television set includes an ATSC (Advanced Television Systems Committee) receiver, which includes an NTSC (National Television Systems Committee) co-channel interference detector based on carrier tracking of the NTSC video carrier signal. The NTSC co-channel interference detector includes a carrier tracking loop and a decision device. The carrier tracking loop processes a received signal for detecting the possible presence of the NTSC video carrier signal and for providing a tracking signal representative thereof. The decision device receives the tracking signal and recovers a DC offset therefrom. The decision device then determines that NTSC co-channel interference is present if the DC offset signal is greater than a predefined threshold.
摘要翻译： 电视机包括ATSC（高级电视系统委员会）接收机，其包括基于NTSC视频载波信号的载波跟踪的NTSC（国家电视系统委员会）同频干扰检测器。 NTSC同信道干扰检测器包括载波跟踪环路和决策设备。 载波跟踪环路处理用于检测NTSC视频载波信号的可能存在的接收信号，并用于提供代表其的跟踪信号。 决定装置接收跟踪信号并从其恢复DC偏移。 如果DC偏移信号大于预定义的阈值，则判定装置然后确定存在NTSC同信道干扰。
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公开(公告)号：US07706489B2
公开(公告)日：2010-04-27
申请号：US11579845
申请日：2005-03-29
IPC分类号： H04L27/00
CPC分类号： H04L25/03057 , H04L7/0054 , H04L7/042 , H04N5/211 , H04N5/455
摘要： A centroid calculator calculates the channel virtual center for an adaptive equalizer, based on some type of training signal (e.g., the segment sync of a ATSC-DTV signal), with internal limiting capability that improves its performance. In addition, a centroid calculator with internal limiting capability that improves performance.
摘要翻译： 质心计算器基于某种类型的训练信号（例如，ATSC-DTV信号的段同步）计算自适应均衡器的信道虚拟中心，具有改善其性能的内部限制能力。 另外，具有内部限制能力的重心计算器可以提高性能。
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公开(公告)号：US07167215B2
公开(公告)日：2007-01-23
申请号：US10474910
申请日：2002-04-16
IPC分类号： H04N5/455
CPC分类号： H03G3/3036 , H04N5/4401 , H04N5/455 , H04N5/52
摘要： A demodulator for a high definition television receiver includes a first circuit element which receives a signal, and is operative in a first arrangement to produce an output signal having a first dynamic range, and operative in a second arrangement to produce an output signal having a second dynamic range different from the first dynamic range. A second circuit element is arranged for optimally processing a signal having a substantially predetermined fixed dynamic range. A gain control circuit is coupled between the first and second circuit elements, and produces a signal having the substantially predetermined fixed dynamic range.
摘要翻译： 一种用于高分辨率电视接收机的解调器包括：第一电路元件，其接收信号，并以第一布置操作以产生具有第一动态范围的输出信号，并且可在第二布置中操作，以产生具有第二 动态范围不同于第一动态范围。 第二电路元件布置成用于最佳地处理具有基本上预定的固定动态范围的信号。 增益控制电路耦合在第一和第二电路元件之间，并产生具有基本预定的固定动态范围的信号。
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公开(公告)号：US07038730B2
公开(公告)日：2006-05-02
申请号：US10192039
申请日：2002-07-10
CPC分类号： H04L25/061 , H04L25/03834 , H04L2027/0087 , H04N5/21 , H04N5/4401
摘要： A communications receiver receives a signal which has not been filtered by a matched pulse shaping filter. In the receiver, a circuit element processes the received signal and as a part of that process introduces additional linear distortion into the processed received signal. A matched filter, coupled to the circuit element, generates a fully matched filtered signal compensated for the distortion intrinsic to the received signal pulse shape and the distortion introduced by the circuit element.
摘要翻译： 通信接收器接收未被匹配的脉冲整形滤波器滤波的信号。 在接收机中，电路元件处理接收到的信号，并且作为该处理的一部分，对经处理的接收信号引入附加的线性失真。 耦合到电路元件的匹配滤波器产生补偿了接收信号脉冲形状固有的失真和由电路元件引入的失真的完全匹配的滤波信号。
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公开(公告)号：US07706483B2
公开(公告)日：2010-04-27
申请号：US11579689
申请日：2005-03-29
IPC分类号： H03D1/00
CPC分类号： H04L27/0014 , H04L2027/0046 , H04L2027/0053 , H04L2027/0067 , H04L2027/0093
摘要： A receiver comprises a demodulator for providing a demodulated signal and a centroid calculator responsive to the demodulated signal for identifying a correct carrier phase for use in the centroid calculation and in removing carrier phase ambiguity in the demodulator. In addition, the centroid calculator may include a limiter.
摘要翻译： 接收机包括用于提供解调信号的解调器和响应于解调信号的质心计算器，用于识别在质心计算中使用的正确载波相位，以及消除解调器中的载波相位模糊度。 另外，重心计算器可以包括限制器。
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公开(公告)号：US07567298B2
公开(公告)日：2009-07-28
申请号：US10535979
申请日：2003-11-12
IPC分类号： H04N5/21
CPC分类号： H04L27/0014 , H04L27/02 , H04N5/21 , H04N5/4401
摘要： A television set includes an ATSC (Advanced Television Systems Committee) receiver, which includes an NTSC (National Television Systems Committee) co-channel interference detector based on carrier tracking of the NTSC video carrier signal. The NTSC co-channel interference detector includes a carrier tracking loop and a decision device. The carrier tracking loop processes a received signal for detecting the possible presence of the NTSC video carrier signal and for providing a tracking signal representative thereof. The decision device receives the tracking signal and recovers a DC offset therefrom. The decision device then determines that NTSC co-channel interference is present if the DC offset signal is greater than a predefined threshold.
摘要翻译： 电视机包括ATSC（高级电视系统委员会）接收机，其包括基于NTSC视频载波信号的载波跟踪的NTSC（国家电视系统委员会）同频干扰检测器。 NTSC同信道干扰检测器包括载波跟踪环路和决策设备。 载波跟踪环路处理用于检测NTSC视频载波信号的可能存在的接收信号，并用于提供代表其的跟踪信号。 决定装置接收跟踪信号并从其恢复DC偏移。 如果DC偏移信号大于预定义的阈值，则判定装置然后确定存在NTSC同信道干扰。
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公开(公告)号：US20070229713A1
公开(公告)日：2007-10-04
申请号：US11579845
申请日：2005-03-29
IPC分类号： H04N5/455
CPC分类号： H04L25/03057 , H04L7/0054 , H04L7/042 , H04N5/211 , H04N5/455
摘要： A centroid calculator calculates the channel virtual center for an adaptive equalizer, based on some type of training signal (e.g., the segment sync of a ATSC-DTV signal), with internal limiting capability that improves its performance. In addition, a centroid calculator with internal limiting capability that improves performance.
摘要翻译： 质心计算器基于某种类型的训练信号（例如，ATSC-DTV信号的段同步）计算自适应均衡器的信道虚拟中心，具有改善其性能的内部限制能力。 另外，具有内部限制能力的重心计算器可以提高性能。
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公开(公告)号：US08234684B2
公开(公告)日：2012-07-31
申请号：US12084543
申请日：2006-06-05
IPC分类号： H04N7/173
CPC分类号： H04N5/50 , H04N5/4401 , H04N21/4345 , H04N21/4382 , H04N21/4383 , H04N21/6131
摘要： A Wireless Regional Area Network (WRAN) receiver comprises a transceiver for communicating with a wireless network over one of a number of channels, and an Advanced Television Systems Committee (ATSC) signal detector for use in forming a supported channel list comprising those ones of the number of channels upon which an ATSC signal was not detected, wherein the ATSC signal detector is a threshold-based detector and detects an ATSC signal as a function of at least one threshold, and wherein the ATSC signal detector is responsive to at least one of a carrier tracking loop lock signal, a symbol timing recovery lock signal and a synchronization (sync) lock signal.
摘要翻译： 无线区域网络（WRAN）接收机包括用于通过多个信道之一与无线网络进行通信的收发机，以及用于形成支持的频道列表的高级电视系统委员会（ATSC）信号检测器，其包括 没有检测到ATSC信号的通道数，其中ATSC信号检测器是基于阈值的检测器，并且检测作为至少一个阈值的函数的ATSC信号，并且其中ATSC信号检测器响应于以下各项中的至少一个： 载波跟踪环锁定信号，符号定时恢复锁定信号和同步（同步）锁定信号。
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