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1.发明申请ITERATIVE DECODER EMPLOYING MULTIPLE EXTERNAL CODE ERROR CHECKS TO LOWER THE ERROR FLOOR 有权使用多个外部代码错误的迭代解码器检查以降低错误地面公开(公告)号：US20080072123A1
公开(公告)日：2008-03-20
申请号：US11944320
申请日：2007-11-21
申请人： Donald Eidson , Abraham Krieger , Ramaswamy Murali
发明人： Donald Eidson , Abraham Krieger , Ramaswamy Murali
CPC分类号： H04L1/005 , H03M13/09 , H03M13/15 , H03M13/2936 , H03M13/2948 , H03M13/2972 , H03M13/3776 , H03M13/3994 , H04L1/0054 , H04L1/0061 , H04L1/0065 , H04L1/0066
摘要： Iterative decoder employing multiple external code error checks to lower the error floor and/or improve decoding performance. Data block redundancy, sometimes via a cyclic redundancy check (CRC) or Reed Solomon (RS) code, enables enhanced iterative decoding performance. Improved decoding performance is achieved during interim iterations before the final iteration. A correctly decoded CRC block, indicating a decoded segment is correct with a high degree of certainty, assigns a very high confidence level to the bits in this segment and is fed back to inner and/or outer decoders (with interleaving, when appropriate) for improved iterative decoding. High confidence bits may be scattered throughout inner decoded frames to influence other bit decisions in subsequent iterations. Turbo decoders typically operate relatively well at regions where the BER is high; the invention improves iterative decoder operation at lower BERs, lowering the ‘BER floor’ that is sometimes problematic with conventional turbo decoders.
摘要翻译： 迭代解码器采用多个外部码错误检查来降低错误帧和/或提高解码性能。 有时通过循环冗余校验（CRC）或Reed Solomon（RS）代码进行数据块冗余，可实现增强的迭代解码性能。 在最终迭代之前的中间迭代期间，可以实现改进的解码性能。 一个正确解码的CRC块，指示解码的段是高度确定的正确的，为该段中的位分配非常高的置信度水平，并将其反馈给内部和/或外部解码器（适当时进行交织），以便 改进的迭代解码。 高置信位可能散布在整个内部解码帧中，以影响后续迭代中的其他位决策。 Turbo解码器通常在BER高的区域相对较好地工作; 本发明改进了在较低BER下的迭代解码器操作，降低了常规turbo解码器有时成问题的“BER地面”。
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2.发明授权Iterative decoder employing multiple external code error checks to lower the error floor 有权迭代解码器采用多个外部代码错误检查来降低错误的底数公开(公告)号：US07568147B2
公开(公告)日：2009-07-28
申请号：US11944320
申请日：2007-11-21
IPC分类号： H03M13/03
CPC分类号： H04L1/005 , H03M13/09 , H03M13/15 , H03M13/2936 , H03M13/2948 , H03M13/2972 , H03M13/3776 , H03M13/3994 , H04L1/0054 , H04L1/0061 , H04L1/0065 , H04L1/0066
摘要： Iterative decoder employing multiple external code error checks to lower the error floor and/or improve decoding performance. Data block redundancy, sometimes via a cyclic redundancy check (CRC) or Reed Solomon (RS) code, enables enhanced iterative decoding performance. Improved decoding performance is achieved during interim iterations before the final iteration. A correctly decoded CRC block, indicating a decoded segment is correct with a high degree of certainty, assigns a very high confidence level to the bits in this segment and is fed back to inner and/or outer decoders (with interleaving, when appropriate) for improved iterative decoding. High confidence bits may be scattered throughout inner decoded frames to influence other bit decisions in subsequent iterations. Turbo decoders typically operate relatively well at regions where the BER is high; the invention improves iterative decoder operation at lower BERs, lowering the ‘BER floor’ that is sometimes problematic with conventional turbo decoders.
摘要翻译： 迭代解码器采用多个外部码错误检查来降低错误帧和/或提高解码性能。 有时通过循环冗余校验（CRC）或Reed Solomon（RS）代码进行数据块冗余，可实现增强的迭代解码性能。 在最终迭代之前的中间迭代期间，可以实现改进的解码性能。 一个正确解码的CRC块，指示解码的段是高度确定的正确的，为该段中的位分配非常高的置信度水平，并将其反馈给内部和/或外部解码器（适当时进行交织），以便 改进的迭代解码。 高置信位可能散布在整个内部解码帧中，以影响后续迭代中的其他位决策。 Turbo解码器通常在BER高的区域相对较好地工作; 本发明改进了在较低BER下的迭代解码器操作，降低了常规turbo解码器有时成问题的“BER地面”。
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3.发明授权Symbol reliability determination and symbol pre-selection based on reliability criteria 有权基于可靠性标准的符号可靠性确定和符号预选公开(公告)号：US07231005B2
公开(公告)日：2007-06-12
申请号：US10368017
申请日：2003-02-14
CPC分类号： H04L1/0054 , H04L1/0055 , H04L25/025 , H04L25/067 , H04L2025/03598
摘要： A method and apparatus for processing demodulated data comprising received symbol data is disclosed. A decoder is used to compute estimated symbols and corresponding reliability metrics. The reliability metrics are transformed into reliability weights. Optionally, residuals relating to the difference between the received symbol data and the estimated symbols are computed. Output data are generated comprising any combination of the following: estimated symbols, reliability weights, residuals, and received symbol data. The residuals may be weighted by the reliability metrics and used by demodulation or error compensation loops to instantaneously reduce or increase the bandwidth of these loops.
摘要翻译： 公开了一种用于处理包括接收符号数据的解调数据的方法和装置。 解码器用于计算估计符号和相应的可靠性度量。 可靠性度量被转化为可靠性权重。 可选地，计算与接收的符号数据和估计的符号之间的差有关的残差。 产生输出数据，包括以下任意组合：估计符号，可靠性权重，残差和接收到的符号数据。 可以通过可靠度度量对残差进行加权，并由解调或误差补偿回路使用，以瞬时减少或增加这些回路的带宽。
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4.发明授权Iterative decoder employing multiple external code error checks to lower the error floor 有权迭代解码器采用多个外部代码错误检查来降低错误的底数公开(公告)号：US07310768B2
公开(公告)日：2007-12-18
申请号：US10892738
申请日：2004-07-16
IPC分类号： H03M13/03
CPC分类号： H04L1/005 , H03M13/09 , H03M13/15 , H03M13/2936 , H03M13/2948 , H03M13/2972 , H03M13/3776 , H03M13/3994 , H04L1/0054 , H04L1/0061 , H04L1/0065 , H04L1/0066
摘要： Iterative decoder employing multiple external code error checks to lower the error floor and/or improve decoding performance. Data block redundancy, sometimes via a cyclic redundancy check (CRC) or Reed Solomon (RS) code, enables enhanced iterative decoding performance. Improved decoding performance is achieved during interim iterations before the final iteration. A correctly decoded CRC block, indicating a decoded segment is correct with a high degree of certainty, assigns a very high confidence level to the bits in this segment and is fed back to inner and/or outer decoders (with interleaving, when appropriate) for improved iterative decoding. High confidence bits may be scattered throughout inner decoded frames to influence other bit decisions in subsequent iterations. Turbo decoders typically operate relatively well at regions where the BER is high; the invention improves iterative decoder operation at lower BERs, lowering the ‘BER floor’ that is sometimes problematic with conventional turbo decoders.
摘要翻译： 迭代解码器采用多个外部码错误检查来降低错误帧和/或提高解码性能。 有时通过循环冗余校验（CRC）或Reed Solomon（RS）代码进行数据块冗余，可实现增强的迭代解码性能。 在最终迭代之前的中间迭代期间，可以实现改进的解码性能。 一个正确解码的CRC块，指示解码的段是高度确定的正确的，为该段中的位分配非常高的置信度水平，并将其反馈给内部和/或外部解码器（适当时进行交织），以便 改进的迭代解码。 高置信位可能散布在整个内部解码帧中，以影响后续迭代中的其他位决策。 Turbo解码器通常在BER高的区域相对较好地工作; 本发明改进了在较低BER下的迭代解码器操作，降低了常规turbo解码器有时成问题的“BER地面”。
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公开(公告)号：US07310369B1
公开(公告)日：2007-12-18
申请号：US09870926
申请日：2001-05-30
CPC分类号： H04L1/20 , H04B17/26 , H04B17/336 , H04L1/0054 , H04L1/0055
摘要： A method for estimating an SNR-related parameter, such as ES/N0, from one or more symbols. The number of symbols within a predetermined number of symbols that fall within one or more collection areas is counted. The count is then associated with a value of the SNR-related parameter. This association may be performed through one or more lookup tables. In one application, a scaling factor is derived from the count. The scaling factor may be used to scale symbols before they are quantized and inputted into a trellis decoder such as a log-MAP decoder.
摘要翻译： 一种用于从一个或多个符号估计SNR相关参数的方法，例如E / S / N 0 0。 计数落入一个或多个收集区域内的预定数量的符号内的符号数。 然后计数与SNR相关参数的值相关联。 该关联可以通过一个或多个查找表来执行。 在一个应用中，从计数导出缩放因子。 比例因子可以在量化之前对符号进行缩放并输入到诸如log-MAP解码器的网格解码器中。
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6.发明授权Efficient communication system for reliable frame transmission over broad SNR ranges 失效高效的通信系统，用于在宽SNR范围内进行可靠的帧传输公开(公告)号：US07336683B1
公开(公告)日：2008-02-26
申请号：US10464361
申请日：2003-06-17
IPC分类号： H04J3/00
CPC分类号： H04B7/18595 , H04L1/0089
摘要： An exemplary satellite communication system comprises a service provider unit communicably coupled to a number of subscriber units via satellite transmission. The service provider unit includes an encoder configured to encode source data into a serial transmit sequence, and is further capable of supporting at least two modes of operation. The serial transmit sequence includes a first unique word identifying a first mode of operation, and is followed by a first payload packet having a first number of channel symbols corresponding to a source packet encoded in accordance with the first mode of operation identified by the first unique word. The first payload packet is encapsulated by two unique words and the time interval between the two unique words is used to determine the first mode of operation identified by the first unique word.
摘要翻译： 示例性卫星通信系统包括通过卫星传输可通信地耦合到多个用户单元的服务提供商单元。 服务提供商单元包括被配置为将源数据编码为串行发送序列的编码器，并且还能够支持至少两种操作模式。 串行发送序列包括识别第一操作模式的第一唯一字，并且后面是第一有效载荷分组，其具有对应于根据由第一唯一的第一唯一标识的第一操作模式编码的源分组的第一数量的信道符号 字。 第一个有效载荷包被两个唯一字封装，并且两个唯一字之间的时间间隔用于确定由第一个唯一字识别的第一操作模式。
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7.发明授权Iteractive decoder employing multiple external code error checks to lower the error floor 有权采用多次外部代码错误检查的迭代解码器来降低错误层数公开(公告)号：US06810502B2
公开(公告)日：2004-10-26
申请号：US09865958
申请日：2001-05-25
IPC分类号： H03M1303
CPC分类号： H04L1/005 , H03M13/09 , H03M13/15 , H03M13/2936 , H03M13/2948 , H03M13/2972 , H03M13/3776 , H03M13/3994 , H04L1/0054 , H04L1/0061 , H04L1/0065 , H04L1/0066
摘要： Iterative decoder employing multiple external code error checks to lower the error floor and/or improve decoding performance. Data block redundancy, sometimes via a cyclic redundancy check (CRC) or Reed Solomon (RS) code, enables enhanced iterative decoding performance. Improved decoding performance is achieved during interim iterations before the final iteration. A correctly decoded CRC block, indicating a decoded segment is correct with a high degree of certainty, assigns a very high confidence level to the bits in this segment and is fed back to inner and/or outer decoders (with interleaving, when appropriate) for improved iterative decoding. High confidence bits may be scattered throughout inner decoded frames to influence other bit decisions in subsequent iterations. Turbo decoders typically operate relatively well at regions where the BER is high; the invention improves iterative decoder operation at lower BERs, lowering the ‘BER floor’ that is sometimes problematic with conventional turbo decoders.
摘要翻译： 迭代解码器采用多个外部码错误检查来降低错误帧和/或提高解码性能。 有时通过循环冗余校验（CRC）或Reed Solomon（RS）代码进行数据块冗余，可实现增强的迭代解码性能。 在最终迭代之前的中间迭代期间，可以实现改进的解码性能。 一个正确解码的CRC块，指示解码的段是高度确定的正确的，为该段中的位分配非常高的置信度水平，并将其反馈给内部和/或外部解码器（适当时进行交织），以便 改进的迭代解码。 高置信位可能散布在整个内部解码帧中，以影响后续迭代中的其他位决策。 Turbo解码器通常在BER高的区域相对较好地工作; 本发明改进了在较低BER下的迭代解码器操作，降低了常规turbo解码器有时成问题的“BER地面”。
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8.发明授权System for carrier phase tracking of coded symbols using reliability metrics for symbol estimates 有权使用符号估计的可靠性度量的编码符号的载波相位跟踪系统公开(公告)号：US06795512B1
公开(公告)日：2004-09-21
申请号：US09715877
申请日：2000-11-17
IPC分类号： H04L2706
CPC分类号： H04L25/067 , H04L1/0054 , H04L1/0055 , H04L25/025 , H04L2025/03598
摘要： A system for carrier phase tracking of symbols. In an embodiment employing a feedback structure, a symbol derotator pre-rotates a symbol by a derotation phase. A symbol and reliability estimation engine provides, responsive to the pre-rotated symbol, an estimate of the symbol and a reliability metric for the estimate. A tracking loop module determines a residual between the pre-rotated symbol and the symbol estimate, weights the residual by the reliability metric for the estimate, and determines a phase offset estimate responsive to the weighted residual. An accumulator then determines a next derotation phase responsive to the phase offset estimate. In an embodiment employing a feedforward structure, a symbol and reliability estimation engine provides an estimate of a symbol and a reliability metric for the estimate. A tracking loop module determines a residual between the symbol and the symbol estimate, weights the residual by the reliability metric for the estimate, and determines a derotation phase responsive to the weighted residual.
摘要翻译： 符号载波相位跟踪系统。 在采用反馈结构的实施例中，符号解旋器通过解旋相预先旋转符号。 符号和可靠性估计引擎响应于预旋转符号提供符号的估计和估计的可靠性度量。 跟踪环模块确定预旋转符号和符号估计之间的残差，将残差加权用于估计的可靠性度量，并且响应于加权残差确定相位偏移估计。 然后，累加器确定响应于相位偏移估计的下一个解旋相位。 在采用前馈结构的实施例中，符号和可靠性估计引擎提供用于估计的符号估计和可靠性度量。 跟踪循环模块确定符号和符号估计之间的残差，将残差加权估计的可靠性度量，并根据加权残差确定解旋相位。
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9.发明授权Method and apparatus for seamlessly switching reception between multimedia streams in a wireless communication system 有权一种用于在无线通信系统中在多媒体流之间无缝切换接收的方法和装置公开(公告)号：US07366462B2
公开(公告)日：2008-04-29
申请号：US10968613
申请日：2004-10-18
IPC分类号： H04H7/00
CPC分类号： H04N5/4401 , H04N5/50 , H04N21/41407 , H04N21/4345 , H04N21/4384 , H04N21/44222
摘要： Techniques to seamlessly switch reception between multimedia programs are described. For “continued decoding”, a wireless device continues to receive, decode, decompress, and (optionally) display a current program, even after a new program has been selected, until overhead information needed to decode the new program is received. After receiving the overhead information, the wireless device decodes the new program but continues to decompress the current program. The wireless device decompresses the new program after decoding this program. For “early decoding”, the wireless device receives a user input and identifies a program with potential for user selection. The identified program may be the one highlighted by the user input or a program anticipated to be selected based on the user input. The wireless device initiates decoding of the identified program, prior to its selection, so that the program can be decompressed and displayed earlier if it is subsequently selected.
摘要翻译： 描述了在多媒体节目之间无缝切换接收的技术。 对于“继续解码”，即使在选择了新的程序之后，无线设备继续接收，解码，解压缩和（可选地）显示当前程序，直到接收到解码新程序所需的开销信息。 在接收到开销信息之后，无线设备解码新程序，但是继续解压缩当前程序。 解码该程序后，无线设备解压缩新程序。 对于“早期解码”，无线设备接收用户输入并识别具有用户选择潜力的节目。 识别的程序可以是由用户输入或预期将基于用户输入选择的程序突出显示的程序。 无线设备在其选择之前启动所识别的节目的解码，使得如果随后选择该节目，则可以更早地解压缩并显示节目。
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10.发明申请Transmission of overhead information for broadcast and multicast services in a wireless communication system 有权在无线通信系统中传输用于广播和多播服务的开销信息公开(公告)号：US20060018269A1
公开(公告)日：2006-01-26
申请号：US11144846
申请日：2005-06-02
IPC分类号： H04B7/212
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： To transmit overhead information for broadcast and multicast services in a system that utilizes multiple radio technologies, time slots used for OFDM in a super-frame are initially ascertained. Overhead information for multiple streams to be sent in the time slots used for OFDM is generated. The overhead information conveys the time slots and the coding and modulation used for the streams and may be given in various forms. Multiple records may be formed for the overhead information for the streams. The overhead information for the streams is processed and time division multiplexed with the data for the streams in the super-frame. Information indicating the time slots used for OFDM in the super-frame may be sent separately or included in the overhead information. An indicator may also be appended to each stream to indicate whether there is any change in the overhead information for the stream in the next super-frame.
摘要翻译： 为了在利用多个无线电技术的系统中传送用于广播和多播服务的开销信息，最初确定了用于超帧中的OFDM的时隙。 产生用于在用于OFDM的时隙中发送的多个流的开销信息。 开销信息传达用于流的时隙和编码和调制，并且可以以各种形式给出。 可以为流的开销信息形成多个记录。 对流的开销信息进行处理，并与超帧中的流的数据进行时分复用。 指示用于超帧中的OFDM的时隙的信息可以单独发送或包括在开销信息中。 指示符也可以附加到每个流以指示在下一个超帧中的流的开销信息是否存在任何改变。
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