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1.发明授权Method and apparatus for digital symbol detection using medium response estimates 有权使用介质响应估计的数字符号检测方法和装置公开(公告)号：US06252918B1
公开(公告)日：2001-06-26
申请号：US09267378
申请日：1999-03-15
IPC分类号： H04B110
CPC分类号： H04B1/707 , H04B7/005 , H04L25/0202 , H04L25/03178 , H04L25/03299
摘要： According to the present invention, the effects of the transmission medium on transmitted information symbols are estimated separately from other effects, e.g., those associated with receive and transmit filters, using knowledge of the pulse shaping. The medium response estimate is then used to detect information symbols. Previously, receivers had used estimates of the composite channel to detect symbols. This, however, assumed uncorrelated noise, which is not always the case.
摘要翻译： 根据本发明，利用脉冲整形的知识，传输介质对所发送的信息符号的影响与其他效果（例如与接收和发射滤波器相关的效果）分开估计。 然后使用介质响应估计来检测信息符号。 以前，接收机已经使用复合信道的估计来检测符号。 然而，这是假设不相关的噪音，并不总是这样。
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公开(公告)号：US5889827A
公开(公告)日：1999-03-30
申请号：US766167
申请日：1996-12-12
CPC分类号： H04B1/707 , H04B7/005 , H04L25/0202 , H04L25/03178 , H04L25/03299
摘要： According to the present invention, the effects of the transmission medium on transmitted information symbols are estimated separately from other effects, e.g., those associated with receive and transmit filters, using knowledge of the pulse shaping. The medium response estimate is then used to detect information symbols. Previously, receivers had used estimates of the composite channel to detect symbols. This, however, assumed uncorrelated noise, which is not always the case.
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3.发明授权Method and apparatus for digital symbol detection using medium response estimates 有权使用介质响应估计的数字符号检测方法和装置公开(公告)号：US06603827B2
公开(公告)日：2003-08-05
申请号：US09769995
申请日：2001-01-25
IPC分类号： H04B169
CPC分类号： H04B1/707 , H04B7/005 , H04L25/0202 , H04L25/03178 , H04L25/03299
摘要： According to the present invention, the effects of the transmission medium on transmitted information symbols are estimated separately from other effects, e.g., those associated with receive and transmit filters, using knowledge of the pulse shaping. The medium response estimate is then used to detect information symbols. Previously, receivers had used estimates of the composite channel to detect symbols. This, however, assumed uncorrelated noise, which is not always the case.
摘要翻译： 根据本发明，利用脉冲整形的知识，传输介质对所发送的信息符号的影响与其他效果（例如与接收和发射滤波器相关的效果）分开估计。 然后使用介质响应估计来检测信息符号。 以前，接收机已经使用复合信道的估计来检测符号。 然而，这是假设不相关的噪音，并不总是这样。
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4.发明授权Interaction between an adjunct positioning system and a radiocommunication system 失效辅助定位系统与无线电通信系统之间的相互作用公开(公告)号：US06826394B1
公开(公告)日：2004-11-30
申请号：US08839861
申请日：1997-04-22
IPC分类号： H04M1100
摘要： Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide techniques which provide for interaction between an adjunct system whose primary function is to provide terminal unit location information and the radiocommunication system. For example, the location information generated by the adjunct system can be used by the radiocommunication system for other purposes, e.g., dynamic channel allocation.
摘要翻译： 在不久的将来，紧急呼叫处理可能需要向紧急服务中心提供终端单元位置信息。 本发明的示例性实施例提供了提供主要功能是提供终端单元位置信息的辅助系统与无线电通信系统之间的交互的技术。 例如，由附加系统生成的位置信息可被无线电通信系统用于其它目的，例如动态信道分配。
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5.发明授权Digital communication systems and methods for differential and/or amplitude encoding and decoding secondary symbols 有权用于差分和/或幅度编码和解码辅助符号的数字通信系统和方法公开(公告)号：US06426978B1
公开(公告)日：2002-07-30
申请号：US09164600
申请日：1998-10-01
IPC分类号： H04L2302
摘要： Digital communication systems and methods combine block encoding and differential and/or amplitude modulation. For every codeword period, one or more additional bits can be transmitted by applying differential modulation and/or amplitude modulation to the codewords. In differential modulation, additional information may be sent by flipping or not flipping the sign of a codeword. In amplitude modulation, additional information may be sent by changing the amplitude of successive codewords. A combination of differential and amplitude encoding may also be used. Thus, the data rate can be increased without increasing the symbol transmission rate.
摘要翻译： 数字通信系统和方法组合块编码和差分和/或幅度调制。 对于每个码字周期，可以通过对码字应用差分调制和/或幅度调制来发送一个或多个附加位。 在差分调制中，可以通过翻转或不翻转码字的符号来发送附加信息。 在幅度调制中，可以通过改变连续码字的幅度来发送附加信息。 还可以使用差分和幅度编码的组合。 因此，可以增加数据速率而不增加符号传输速率。
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6.发明授权Methods and apparatus for canceling adjacent channel signals in digital communications systems 失效用于消除数字通信系统中相邻信道信号的方法和装置
公开(公告)号：US6137843A
公开(公告)日：2000-10-24
申请号：US901693
申请日：1997-07-28
IPC分类号： H04J1/00 , H01Q1/24 , H01Q21/08 , H01Q21/28 , H04B1/10 , H04B1/12 , H04B7/005 , H04B7/08 , H04B7/10 , H04B7/185 , H04B7/195 , H04B7/204 , H04B7/212 , H04B7/26 , H04J1/12 , H04J3/00 , H04L1/00 , H04L1/06 , H04L25/02 , H04L25/03 , H04W16/02 , H04W16/14 , H04W74/08 , H04W84/02 , H04W84/04 , H04W84/06 , H04L25/08
CPC分类号： H01Q1/246 , H01Q21/08 , H01Q21/28 , H04B1/126 , H04B7/0851 , H04B7/10 , H04B7/18513 , H04B7/18515 , H04B7/18532 , H04B7/18567 , H04B7/2041 , H04L1/06 , H04L25/0204 , H04L25/021 , H04L25/03331 , H04W16/02 , H04W84/025 , H04B7/0837 , H04L1/007 , H04L25/03203 , H04L25/0328 , H04L25/03299 , H04W16/14 , H04W74/08 , H04W84/042 , H04W84/06
摘要： A multi-signal cancelling demodulator in which signals of interest are demodulated using information obtained during demodulation of adjacent signals. By utilizing detected information in an across-channel fashion, exemplary cancelling demodulators provide superior adjacent channel interference rejection. The cancelling demodulation is conducted in either serial or parallel fashion. In exemplary parallel demodulation embodiments, two channels are demodulated simultaneously in iterative fashion. Detected information obtained at each step in the iterative process is used as a priori information for demodulation in a following step. In exemplary serial demodulation embodiments, the stronger of two received signals is demodulated, and the resulting detected information is used as a priori information for demodulation of the weaker of the two received signals. For both the serial and parallel demodulation embodiments, novel techniques are disclosed for transforming symbols detected in one frequency band to corresponding symbols in adjacent frequency bands. Such inter-channel transformations are also applied in the context of channel estimation. In an exemplary channel estimator, multiple channel parameter estimates for a particular frequency channel are provided based on a received baseband signal corresponding to that frequency channel. Since inter-channel information is used in providing the channel parameter estimates, the exemplary channel estimator provides superior adjacent channel interference rejection.
摘要翻译： 一种多信号消除解调器，其中使用在相邻信号的解调期间获得的信息来解调感兴趣的信号。 通过利用跨信道方式的检测信息，示例性的消除解调器提供了优越的相邻信道干扰抑制。 取消解调以串行或并行方式进行。 在示例性并行解调实施例中，两个信道以迭代方式同时被解调。 在迭代处理中的每个步骤获得的检测信息被用作以下步骤中的解调的先验信息。 在示例性串行解调实施例中，两个接收信号中的较强者被解调，并且所得到的检测信息被用作用于解调两个接收信号较弱的先验信息。 对于串行和并行解调实施例，公开了用于将在一个频带中检测的符号变换为相邻频带中的相应符号的新颖技术。 这样的信道间变换也在信道估计的上下文中应用。 在示例性信道估计器中，基于对应于该频率信道的接收基带信号来提供针对特定频率信道的多信道参数估计。 由于在提供信道参数估计中使用信道间信息，所以示例性信道估计器提供了优越的相邻信道干扰抑制。
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公开(公告)号：US07899015B2
公开(公告)日：2011-03-01
申请号：US11681302
申请日：2007-03-02
IPC分类号： H04B7/216
CPC分类号： H04W72/0406 , H04B2201/709727 , H04W4/18 , H04W48/08 , H04W72/082
摘要： Method and apparatuses taught herein enable link adaptation feedback to be determined in advance for future transmit intervals, based on one or more data sending units sending indications of future transmit resource allocations, and receiving corresponding link adaptation feedback from data receiving units. Knowledge of the future transmit resource allocations enable individual data sending units to predict interference conditions for the future transmit interval, and thereby compute link adaptation feedback that takes advantage of low-interference conditions. Individual data sending units receive link adaptation feedback for the future transmit interval from the data receiving units they are supporting, and make corresponding link adaptations for the future transmit interval. Such operations are, in one or more embodiments, carried out in a Wideband Code Division Multiple Access (WCDMA), Long Term Evolution LTE), or WiMAX network, wherein the data sending units comprise radio base stations, and the data receiving units comprise wireless communication devices.
摘要翻译： 基于一个或多个数据发送单元发送未来发送资源分配的指示，以及从数据接收单元接收相应的链路适配反馈，本文教导的方法和装置使能够针对未来的发射间隔预先确定链路自适应反馈。 对未来发送资源分配的了解使各个数据发送单元能够预测未来发射间隔的干扰条件，从而计算利用低干扰条件的链路自适应反馈。 单个数据发送单元从其所支持的数据接收单元接收将来发送间隔的链路自适应反馈，并对未来发送间隔进行相应的链路适配。 在一个或多个实施例中，这样的操作在宽带码分多址（WCDMA），长期演进LTE）或WiMAX网络中进行，其中数据发送单元包括无线电基站，并且数据接收单元包括无线 通讯设备。
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公开(公告)号：US20080212539A1
公开(公告)日：2008-09-04
申请号：US11681302
申请日：2007-03-02
IPC分类号： H04B7/216
CPC分类号： H04W72/0406 , H04B2201/709727 , H04W4/18 , H04W48/08 , H04W72/082
摘要： Method and apparatuses taught herein enable link adaptation feedback to be determined in advance for future transmit intervals, based on one or more data sending units sending indications of future transmit resource allocations, and receiving corresponding link adaptation feedback from data receiving units. Knowledge of the future transmit resource allocations enable individual data sending units to predict interference conditions for the future transmit interval, and thereby compute link adaptation feedback that takes advantage of low-interference conditions. Individual data sending units receive link adaptation feedback for the future transmit interval from the data receiving units they are supporting, and make corresponding link adaptations for the future transmit interval. Such operations are, in one or more embodiments, carried out in a Wideband Code Division Multiple Access (WCDMA), Long Term Evolution LTE), or WiMAX network, wherein the data sending units comprise radio base stations, and the data receiving units comprise wireless communication devices.
摘要翻译： 基于一个或多个数据发送单元发送未来发送资源分配的指示，以及从数据接收单元接收相应的链路适配反馈，本文教导的方法和装置使能够针对未来的发射间隔预先确定链路自适应反馈。 对未来发送资源分配的了解使各个数据发送单元能够预测未来发射间隔的干扰条件，从而计算利用低干扰条件的链路自适应反馈。 单个数据发送单元从其所支持的数据接收单元接收将来发送间隔的链路自适应反馈，并对未来发送间隔进行相应的链路适配。 在一个或多个实施例中，这样的操作在宽带码分多址（WCDMA），长期演进LTE）或WiMAX网络中进行，其中数据发送单元包括无线电基站，并且数据接收单元包括无线 通讯设备。
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公开(公告)号：US06775340B1
公开(公告)日：2004-08-10
申请号：US09687500
申请日：2000-10-13
IPC分类号： H04L700
CPC分类号： H04L25/0236 , H04B2201/70701 , H04L7/04 , H04L25/03337
摘要： A mobile communications system receiver has improved synchronization and channel estimation for receiving a transmitted signal passing through a radio channel. A processor receives and samples the transmitted signal for a plurality of timing hypotheses. A channel estimator hypothesizes unknown symbols at a pilot cluster of the sampled signal and estimates the radio channel of the pilot cluster for each hypothesized symbol sequence. The estimator determines an error corresponding to each hypothesized symbol sequence using the sampled signal, the estimated radio channel and the hypothesized symbols and determines actual timing estimates and actual radio channel estimates by selecting the radio channel estimates associated with the hypothesized symbols and the timing and hypothesis that minimizes the error.
摘要翻译： 移动通信系统接收机具有改进的同步和信道估计，用于接收通过无线电信道的发射信号。 处理器接收并采样所发送的信号用于多个定时假设。 信道估计器假设在采样信号的导频簇处的未知符号，并且针对每个假设的符号序列估计导频簇的无线电信道。 估计器使用采样信号，估计无线电信道和假设符号来确定与每个假设符号序列相对应的误差，并且通过选择与假设符号相关联的无线电信道估计以及时间和假设来确定实际的定时估计和实际的无线电信道估计 这最小化了错误。
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10.发明授权Delay searcher and delay trackers interaction for new delays assignment to rake fingers 有权延迟搜索器和延迟跟踪器互动，为耙指指定新的延迟公开(公告)号：US06891883B2
公开(公告)日：2005-05-10
申请号：US10365857
申请日：2003-02-13
IPC分类号： H04B1/7113 , H04B1/7115 , H04B1/7117 , H04B1/707
CPC分类号： H04B1/7117 , H04B1/7113 , H04B1/7115
摘要： A direct sequence spread spectrum receiver for operating in a multipath fading channel comprises a rake receiver having plural rake fingers. Each rake finger demodulates a received signal from one of plural channel paths. The output of the plural rake fingers are combined. Each rake finger utilizes a select assigned delay to synchronize to a delay of the one channel path. A searcher periodically performs a channel search on the received signal to detect new delays of strongest paths in the channel. Plural trackers, one for each channel path, adjust the select assigned delays between searches performed by the searcher. A delay controller is operatively coupled to the searcher and the trackers. The delay controller compares new delays of the strongest paths from the searcher to the select assigned delays and reassigns one of the select assigned delays with one of the new delays only if the new delay differs from the one select assigned delay more than a predetermined threshold.
摘要翻译： 用于在多径衰落信道中操作的直接序列扩频接收机包括具有多个耙指的耙式接收机。 每个耙指解调来自多个通道路径之一的接收信号。 多个耙指的输出被组合。 每个耙指使用选择分配的延迟来同步到一个通道路径的延迟。 搜索者周期性地对接收到的信号执行频道搜索，以检测频道中最强路径的新延迟。 多个跟踪器（每个通道路径一个）调整由搜索器执行的搜索之间的选择分配的延迟。 延迟控制器可操作地耦合到搜索器和跟踪器。 延迟控制器将来自搜索器的最强路径的新延迟与选择分配的延迟进行比较，并且只有当新延迟与超过预定阈值的一个选择分配的延迟不同时，才将所选择的分配的延迟之一与新的延迟之一重新分配。
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