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1. 发明授权

US06421371B1 Modulation sequence synchronization methods and apparatus employing partial sequence correlation 有权
标题翻译：调制序列同步方法和采用部分序列相关的装置
公开(公告)号：US06421371B1
公开(公告)日：2002-07-16
申请号：US09193583
申请日：1998-11-17
申请人： Essam Sourour , Gregory E. Bottomley , R. David Koilpillai
发明人： Essam Sourour , Gregory E. Bottomley , R. David Koilpillai
IPC分类号： H04L2730
CPC分类号： H04B1/70752 , G06F17/15 , H04B1/70751 , H04B1/7077
摘要： A receiver in a communications system is operated by receiving a radio communications signal transmitted by a station of the communications system and generating a correlation output representing a correlation of the received radio communications signal and a subsequence of a modulation sequence that is selected based on a correlation between the selected subsequence and the modulation sequence. The receiver is then synchronized based on the generated correlation output. The selected subsequence preferably has an optimal out-of-phase correlation with the modulation sequence. According to an aspect of the present invention, the selected subsequence has a minimum out of phase correlation with the modulation sequence in comparison to other subsequences of the modulation sequence. For example, the selected subsequence may have a “minimum maximum” out-of-phase correlation value, a “minimum aggregate” out-of-phase correlation metric, or a combination thereof.
摘要翻译：通信系统中的接收机通过接收由通信系统的站发送的无线电通信信号来工作，并产生表示所接收的无线电通信信号与基于相关性选择的调制序列的子序列的相关性的相关输出在所选择的子序列和调制序列之间。接收机然后基于产生的相关输出进行同步。所选择的子序列优选地与调制序列具有最佳的异相相关。根据本发明的一个方面，与调制序列的其他子序列相比，所选择的子序列与调制序列具有最小的异相相关性。例如，所选择的子序列可以具有“最小最大值”异相相关值，“最小聚合”异相相关度量或其组合。

2. 发明授权

US06891883B2 Delay searcher and delay trackers interaction for new delays assignment to rake fingers 有权
标题翻译：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
申请人： Essam Sourour , Gregory E. Bottomley , Rajaram Ramesh
发明人： Essam Sourour , Gregory E. Bottomley , Rajaram Ramesh
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。

3. 发明授权

US6147982A System and method for synchronizing acquisition for a code modulated communication system 失效
标题翻译：用于同步代码调制通信系统采集的系统和方法
公开(公告)号：US6147982A
公开(公告)日：2000-11-14
申请号：US1029
申请日：1997-12-30
申请人： Essam Sourour , Gregory E. Bottomley , Rajaram Ramesh
发明人： Essam Sourour , Gregory E. Bottomley , Rajaram Ramesh
IPC分类号： H04B1/7075 , H04B1/7077 , H04L7/00 , H04J3/06 , H04B7/212
CPC分类号： H04B1/70775 , H04B1/70755
摘要： A system and method for a synchronizing acquisition of a transmitted signal with a local code in a code modulated communication system. The local code is comprised of a replica of the transmitted code. Samples of the transmitted code are correlated with the local code and resulting periodic output samples having indexes are compared with a threshold. Selected indexes of the samples exceeding the threshold are stored and verified for synchronization. Stored correlation indexes which exceed the threshold are combined, and a responder achieves synchronization between transmitted signal and the local code.
摘要翻译：一种用于在编码调制通信系统中与本地码同步采集发射信号的系统和方法。本地代码由发送代码的副本组成。将发送代码的样本与本地代码相关联，并将具有索引的所得周期性输出样本与阈值进行比较。存储并验证超过阈值的样本的选定索引以进行同步。组合超过阈值的存储相关指标，响应者实现发送信号与本地代码之间的同步。

4. 发明授权

US06560273B1 Delay searcher and delay trackers interaction for new delays assignment to rake fingers 有权
标题翻译：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：US06560273B1
公开(公告)日：2003-05-06
申请号：US09168233
申请日：1998-10-07
申请人： Essam Sourour , Gregory E. Bottomley , Rajaram Ramesh
发明人： Essam Sourour , Gregory E. Bottomley , Rajaram Ramesh
IPC分类号： H04B1707
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 on 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信道路径上的接收信号。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。

5. 发明授权

US06333953B1 System and methods for selecting an appropriate detection technique in a radiocommunication system 失效
标题翻译：在无线电通信系统中选择合适的检测技术的系统和方法
公开(公告)号：US06333953B1
公开(公告)日：2001-12-25
申请号：US08897309
申请日：1997-07-21
申请人： Gregory E. Bottomley , Jyun-Cheng Chen , R. David Koilpillai
发明人： Gregory E. Bottomley , Jyun-Cheng Chen , R. David Koilpillai
IPC分类号： H03K900
CPC分类号： H04L25/03006 , H04L25/02
摘要： Techniques for adapting detection schemes used in receivers for receiving radio signals are described. The received signal is processed to determine, for example, an amount of time dispersion present in the radio channel. Based on this determination an appropriate detection scheme is selected for detecting the transmitted symbols. Various techniques for determining the dispersive or non-dispersive nature of the channel are described.
摘要翻译：描述用于适应用于接收无线电信号的接收机中使用的检测方案的技术。处理接收到的信号以确定例如存在于无线电信道中的时间色散量。基于该确定，选择适当的检测方案来检测所发送的符号。描述了用于确定通道的分散性或非分散性的各种技术。

6. 发明授权

US06826394B1 Interaction between an adjunct positioning system and a radiocommunication system 失效
标题翻译：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
申请人： Alex K. Raith , Rajaram Ramesh , R. David Koilpillai , Gregory E. Bottomley , Havish Koorapaty
发明人： Alex K. Raith , Rajaram Ramesh , R. David Koilpillai , Gregory E. Bottomley , Havish Koorapaty
IPC分类号： H04M1100
CPC分类号： H04W4/90 , H04W76/50
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。

7. 发明授权

US06374098B1 Systems and methods for locating remote units operating in a radiocommunication system using an adjunct system 失效
标题翻译：用于定位在使用辅助系统的无线电通信系统中运行的远程单元的系统和方法
公开(公告)号：US06374098B1
公开(公告)日：2002-04-16
申请号：US08840590
申请日：1997-04-22
申请人： Alex K. Raith , R. David Koilpillai , Gregory E. Bottomley , Havish Koorapaty , Rajaram Ramesh
发明人： Alex K. Raith , R. David Koilpillai , Gregory E. Bottomley , Havish Koorapaty , Rajaram Ramesh
IPC分类号： H04M1100
CPC分类号： H04W4/90 , H04W76/50
摘要： Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Independent or quasi-independent systems, sometimes referred to as adjunct systems, can be provided to monitor remote unit transmissions and derive location information for mobile units making emergency access therefrom. Techniques for determining which channels each adjunct receive shall monitor are described herein, as well as specific monitoring techniques. Moreover, the adjunct system can use the received information to provide a second speech path to an emergency service center.
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。可以提供独立或准独立系统，有时称为附属系统，以监视远程单元传输并导出从其进行紧急访问的移动单元的位置信息。这里描述了用于确定每个附件接收的哪些通道应该监视的技术，以及具体的监视技术。此外，辅助系统可以使用所接收的信息来向紧急服务中心提供第二语音路径。

8. 发明授权

US5577068A Generalized direct update viterbi equalizer 失效
标题翻译：广义直接更新维特比均衡器
公开(公告)号：US5577068A
公开(公告)日：1996-11-19
申请号：US274727
申请日：1994-07-18
申请人： Gregory E. Bottomley , Sandeep Chennakeshu , Paul W. Dent , R. David Koilpillai
发明人： Gregory E. Bottomley , Sandeep Chennakeshu , Paul W. Dent , R. David Koilpillai
IPC分类号： H04B7/005 , H03M13/23 , H04L25/03 , H04B1/10 , H04L27/01
CPC分类号： H04B7/005 , H04L25/03184 , H04L25/03292
摘要： A radio receiver for demodulating and equalizing digital information is disclosed. The receiver receives radio signals and processes the signals to produce data samples which are then stored. Reference values that model what the receiver should receive for various transmitted symbol sequence hypotheses are also stored. The receiver equalizes the received data using the stored reference values to produce symbol detection information, and updates the reference values based on the symbol detection information.
摘要翻译：公开了用于解调和均衡数字信息的无线电接收机。接收机接收无线电信号并处理信号以产生然后被存储的数据样本。对存储各种发送的符号序列假设的接收机应该接收什么的参考值也被存储。接收机使用所存储的参考值均衡接收到的数据以产生符号检测信息，并且基于符号检测信息来更新参考值。

9. 发明授权

US08724741B2 Signal quality estimation from coupling matrix 有权
标题翻译：耦合矩阵的信号质量估计
公开(公告)号：US08724741B2
公开(公告)日：2014-05-13
申请号：US12572680
申请日：2009-10-02
申请人： Gregory E. Bottomley , Yi-Pin Eric Wang
发明人： Gregory E. Bottomley , Yi-Pin Eric Wang
IPC分类号： H04L27/00 , H04L27/06 , H03D1/06
CPC分类号： H04B17/309 , H04B17/26 , H04L2025/03426
摘要： The quality of a received signal in a non-linear receiver is estimated using a coupling matrix G or Q that describes the interaction of symbols in the received signal with other symbols and/or how the impairment (noise and interference) interacts in the received signal. The coupling matrix is also useful for joint detection. The signal quality estimate may include, e.g., the minimum eigenvalue, and other functions, such as the determinant and trace of the coupling matrix. When G or Q varies with each block, as in CDMA systems employing longcode scrambling, a representative matrix can be used, such as a matrix of RMS values or average magnitudes of real and imaginary components. The signal quality estimate can be expressed as a bit error rate (BER).
摘要翻译：使用描述接收信号中的符号与其他符号的相互作用和/或接收信号中的损害（噪声和干扰）如何相互作用的耦合矩阵G或Q来估计非线性接收机中的接收信号的质量。耦合矩阵对于联合检测也是有用的。信号质量估计可以包括例如最小特征值和其他函数，诸如耦合矩阵的行列式和轨迹。当G或Q随每个块变化时，如在使用长码扰码的CDMA系统中，可以使用代表性矩阵，例如RMS值矩阵或实部和虚部分量的平均幅度。信号质量估计可以表示为误码率（BER）。

10. 发明授权

US08718199B2 Frequency-domain multi-stage group detection for alleviating inter-symbol interference 有权
标题翻译：用于减轻符号间干扰的频域多级组检测
公开(公告)号：US08718199B2
公开(公告)日：2014-05-06
申请号：US13050433
申请日：2011-03-17
申请人： Yi-Pin Eric Wang , Gregory E. Bottomley
发明人： Yi-Pin Eric Wang , Gregory E. Bottomley
IPC分类号： H04L27/06
CPC分类号： H04L25/08 , H04L25/03012 , H04L25/03159 , H04L25/03171 , H04L25/03184 , H04L25/03312 , H04L25/03331 , H04L2025/03414 , H04L2025/03426
摘要： A receiver comprises plural receive antennas and electronic circuitry. The plural receive antennas are configured to receive, on plural subcarriers transmitted over a radio interface, a frequency domain signal that comprises contribution from a block of time domain symbols. The electronic circuitry is configured or operable to perform symbol detection of time domain symbols comprising the block by performing a multi-stage joint detection procedure comprising plural stages, and thus serves as a detector (40). For a first stage the block is divided into a first number of sub-blocks each having a sub-block first size. For a second stage the block is divided into a second number of sub-blocks each having a sub-block second size, the sub-block second size being greater than the sub-block first size. For each stage a detector (40) formulates frequency domain combining weights and uses the frequency domain combining weights for combining multiple receive versions of each subcarrier to provide candidate symbol combination values for symbols in each sub-block of the respective stage. For the second stage the detector (40) is further configured to use the candidate symbol combination values of the first stage to formulate joint hypotheses to serve as candidates for the joint detection operation of the second stage.
摘要翻译：接收机包括多个接收天线和电子电路。多个接收天线被配置为在由无线电接口发送的多个子载波上接收包括来自时域符号块的贡献的频域信号。电子电路被配置或可操作以通过执行包括多个级的多级联合检测过程来执行包括该块的时域符号的符号检测，从而用作检测器（40）。对于第一阶段，块被分成具有子块第一大小的第一数量的子块。对于第二级，块被分成第二数量的子块，每个子块具有子块的第二尺寸，子块的第二尺寸大于子块的第一尺寸。对于每个阶段，检测器（40）制定频域组合权重并使用频域组合权重来组合每个子载波的多个接收版本，以为相应级的每个子块中的符号提供候选符号组合值。对于第二级，检测器（40）还被配置为使用第一级的候选符号组合值来形成联合假设以用作第二级的联合检测操作的候选。

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