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21. 发明授权

US5937015A Interference mitigation by joint decoding of overlapped signals 失效
标题翻译：通过联合解码重叠信号进行干扰减轻
公开(公告)号：US5937015A
公开(公告)日：1999-08-10
申请号：US710537
申请日：1996-09-19
申请人： Paul W. Dent , Gregory E. Bottomley
发明人： Paul W. Dent , Gregory E. Bottomley
IPC分类号： H03M13/41 , H01Q1/24 , H01Q21/08 , H01Q21/28 , H03M13/00 , H03M13/27 , H03M13/35 , H03M13/45 , H04B7/08 , H04B7/10 , H04B7/185 , H04L1/00 , H04L1/06 , H04L25/03 , H04L25/08 , H04L27/00 , H04W84/02 , H04B1/10 , H03M13/22
CPC分类号： H04L1/0069 , H01Q1/246 , H01Q21/08 , H01Q21/28 , H03M13/27 , H03M13/35 , H03M13/41 , H04B7/0851 , H04B7/10 , H04B7/18515 , H04B7/18532 , H04B7/18567 , H04L1/0048 , H04L1/0054 , H04L1/007 , H04L1/0071 , H04L25/03203 , H04L25/03331 , H04W84/025 , H04B7/0837
摘要： A digital information bit that has been encoded and transmitted as a first modulated signal from a first transmitter in the presence of a second modulated signal that has been transmitted by a second transmitter is received and decoded by receiving a composite signal that is a sum of the first modulated signal and the second modulated signal. The composite signal is processed to generate a complex numerical sample. Then, a plurality of bit pairs are hypothesized, wherein each hypothesized bit pair includes a hypothesized first information bit encoded and transmitted by the first transmitter and a hypothesized second information bit encoded and transmitted by the second transmitter. For each of the plurality of hypothesized bit pairs, a path metric is generated that is indicative of a likelihood that information sequence estimates are accurate estimates, wherein the information sequence estimates include the hypothesized first and second information bits. For each of the plurality of hypothesized bit pairs, the generated path metric is added to a previously determined cumulative path metric to generate a most recent cumulative path metric. An information sequence estimate is selected that has a lowest most recent cumulative path metric, wherein the selected information sequence estimate includes an information sequence estimated to have been encoded and transmitted by the first transmitter and an information sequence estimated to have been encoded and transmitted by the second transmitter.
摘要翻译：在存在由第二发送机发送的第二调制信号的情况下，已经被编码并作为来自第一发送机的第一调制信号发送的数字信息比特通过接收和解码，该复合信号是第一调制信号和第二调制信号。处理复合信号以产生复数数值样本。然后，假设多个比特对，其中每个假设的比特对包括由第一发射机编码和发送的假设的第一信息比特和由第二发射机编码和发射的假设的第二信息比特。对于多个假设比特对中的每一个，生成指示信息序列估计是精确估计的可能性的路径度量，其中信息序列估计包括假定的第一和第二信息比特。对于多个假设比特对中的每一个，生成的路径量度被加到先前确定的累积路径度量以生成最近的累积路径量度。选择具有最低最近累积路径量度的信息序列估计，其中所选择的信息序列估计包括被估计为由第一发射机编码和传输的信息序列，以及被估计为由第二发射机。

22. 发明授权

US5572552A Method and system for demodulation of downlink CDMA signals 失效
标题翻译：用于解调下行链路CDMA信号的方法和系统
公开(公告)号：US5572552A
公开(公告)日：1996-11-05
申请号：US187062
申请日：1994-01-27
申请人： Paul W. Dent , Gregory E. Bottomley
发明人： Paul W. Dent , Gregory E. Bottomley
IPC分类号： H04B7/08 , H03D1/00 , H04B1/10
CPC分类号： H04B1/7097 , H04B7/0865
摘要： Demodulation of a CDMA downlink signal is performed by filtering correlations of the received signal with a known signature sequence. Unlike the conventional RAKE receiver, the filtering is not necessarily a FIR filter with coefficients equal to the conjugates of channel tap estimates. Instead, the present invention filters in such a way as to maximize the output signal-to-noise ratio, accounting for the fact that part of the noise comes from the same base station as the signal, so that it is colored by the same channel as the signal.
摘要翻译：通过对接收到的信号与已知签名序列的相关性进行滤波来执行CDMA下行链路信号的解调。与常规RAKE接收机不同，滤波不一定是具有等于信道抽头估计的共轭的系数的FIR滤波器。相反，本发明以使得输出信噪比最大化的方式进行滤波，考虑到噪声的一部分来自与信号相同的基站的事实，使得它被相同信道着色作为信号。

23. 发明授权

US07440489B2 Method and apparatus for selective demodulation and decoding of communications signals 有权
标题翻译：用于选择性解调和解码通信信号的方法和装置
公开(公告)号：US07440489B2
公开(公告)日：2008-10-21
申请号：US09923374
申请日：2001-08-07
申请人： Erik Dahlman , Yi-Pin Eric Wang , Paul W. Dent , Gregory E. Bottomley , Ali Khayrallah , Christer Östberg
发明人： Erik Dahlman , Yi-Pin Eric Wang , Paul W. Dent , Gregory E. Bottomley , Ali Khayrallah , Christer Östberg
IPC分类号： H04K1/00 , H04B15/00 , H04L27/30
CPC分类号： H04B1/7115 , H04B1/7075 , H04B1/709 , H04B1/712 , H04B2201/7071 , H04B2201/709727
摘要： A spread spectrum signal is processed by correlating the spread spectrum signal with a spreading sequence at a first plurality of correlation times to produce a first plurality of time-offset correlations. The first plurality of time-offset correlations is processed to produce a first symbol representation for a symbol. A first quality is determined for the first symbol representation. Responsive to the determined first quality, it is determined whether to further process the first symbol representation or to process a second symbol representation for the symbol generated from the spread spectrum signal. The first quality may be determined, for example, by decoding the first symbol representations to generate a decoding metric or error check indicator, such as a CRC result. The symbol representations may be generated and/or evaluated for quality in a serial fashion or a parallel fashion.
摘要翻译：通过在第一多个相关时间将扩展频谱信号与扩频序列相关来处理扩展频谱信号，以产生第一多个时间偏移相关。处理第一多个时间偏移相关以产生符号的第一符号表示。确定第一个符号表示的第一个质量。响应于确定的第一质量，确定是否进一步处理第一符号表示或处理从扩频信号产生的符号的第二符号表示。可以例如通过对第一符号表示进行解码以产生诸如CRC结果的解码度量或错误检查指示符来确定第一质量。符号表示可以以串行方式或并行方式生成和/或评估质量。

24. 发明授权

US5771288A Multiple access coding for radio communications 失效
标题翻译：无线电通信的多址接入编码
公开(公告)号：US5771288A
公开(公告)日：1998-06-23
申请号：US799590
申请日：1997-02-10
申请人： Paul W. Dent , Gregory E. Bottomley
发明人： Paul W. Dent , Gregory E. Bottomley
IPC分类号： H04Q7/38 , H01J13/00 , H04B1/707 , H04J11/00 , H04J13/00 , H04J13/12 , H04J13/16 , H04L1/00 , H04L1/02 , H04L9/00 , H04L9/18
CPC分类号： H04L1/0057 , H04B1/707 , H04J13/00 , H04J13/0048 , H04J13/12 , H04J13/004 , H04J13/16 , H04L2209/04 , H04L2209/34
摘要： Individual information signals encoded with a common block error-correction code are assigned a unique scrambling mask, or signature sequence, taken from a set of scrambling masks having selected correlation properties. The set of scrambling masks is selected such that the correlation between the modulo-2 sum of two masks with any codeword in the block code is a constant magnitude, independent of the mask set and the individual masks being compared. In one embodiment, when any two masks are summed using modulo-2 arithmetic, the Walsh transformation of that sum results in a maximally flat Walsh spectrum. For cellular radio telephone systems using subtractive CDMA demodulation techniques, a two-tier ciphering system ensures security at the cellular system level by using a pseudorandomly generated code key to select one of the scrambling masks common to all of the mobile stations in a particular cell. Also, privacy at the individual mobile subscriber level is ensured by using a pseudorandomly generated ciphering key to encipher individual information signals before the scrambling operation.
摘要翻译：对具有公共块纠错码编码的个别信息信号被分配从具有所选相关特性的一组加扰掩码中获得的唯一加密掩码或签名序列。选择这组加扰掩码，使得两个掩模的模2之和与块码中的任何码字之间的相关性是恒定的幅度，与掩模集合和被比较的各个掩码无关。在一个实施例中，当使用模2算术对任何两个掩模求和时，该和的沃尔什变换导致最大平均沃尔什频谱。对于使用减法CDMA解调技术的蜂窝无线电话系统，双层加密系统通过使用伪随机生成的代码密钥来选择蜂窝系统级别中的安全性，以选择特定小区中所有移动台公共的加扰掩码之一。此外，通过在加扰操作之前使用伪随机生成的加密密钥来加密各个信息信号来确保个人移动用户级别的隐私。

25. 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。

26. 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。

27. 发明授权

US06570910B1 Baseband processor with look-ahead parameter estimation capabilities 有权
标题翻译：具有先行参数估计功能的基带处理器
公开(公告)号：US06570910B1
公开(公告)日：2003-05-27
申请号：US09426374
申请日：1999-10-25
申请人： Gregory E. Bottomley , Paul W. Dent , Ross W. Lampe
发明人： Gregory E. Bottomley , Paul W. Dent , Ross W. Lampe
IPC分类号： H04B166
CPC分类号： H04L25/03337 , H03M13/39 , H04B17/26 , H04B17/318 , H04B17/373 , H04L1/0054 , H04L25/0212 , H04L25/025
摘要： In a receiver for receiving data samples including a sequence of symbol values transmitted across the channel, a baseband processor including a first hypothesize unit developing first sets of hypothetical symbol values, a second hypothesize unit developing second sets of hypothetical symbol values different from the first sets, a parameter estimator receiving the received data samples and the first and second sets of hypothetical symbol values and developing parameter estimates based thereon, and a sequence estimator receiving the developed parameter estimates, the first sets of hypothetical symbol values and a delayed version of the received data samples and developing a sequence of detected symbol values related to the received data samples.
摘要翻译：在用于接收数据样本的接收机中，包括通过所述信道发送的符号值序列的基带处理器，包括第一假设单元，其形成第一组假设符号值;第二假设单元，形成与所述第一组不同的第二组假设符号值接收接收到的数据样本的参数估计器以及基于其的开发参数估计的第一和第二组假设符号值以及接收所开发的参数估计的序列估计器，所接收的第一组假设符号值和延迟版本数据样本并开发与接收的数据样本相关的检测符号值的序列。

28. 发明授权

US5742678A Multiple access coding for radio communications 失效
公开(公告)号：US5742678A
公开(公告)日：1998-04-21
申请号：US647187
申请日：1996-05-09
申请人： Paul W. Dent , Gregory E. Bottomley
发明人： Paul W. Dent , Gregory E. Bottomley
IPC分类号： H04Q7/38 , H01J13/00 , H04B1/707 , H04J11/00 , H04J13/00 , H04J13/12 , H04J13/16 , H04L1/00 , H04L1/02 , H04L9/00 , H04L9/18
CPC分类号： H04L1/0057 , H04B1/707 , H04J13/00 , H04J13/0048 , H04J13/12 , H04J13/004 , H04J13/16 , H04L2209/04 , H04L2209/34
摘要： Individual information signals encoded with a common block error-correction code are assigned a unique scrambling mask, or signature sequence, taken from a set of scrambling masks having selected correlation properties. The set of scrambling masks is selected such that the correlation between the modulo-2 sum of two masks with any codeword in the block code is a constant magnitude, independent of the mask set and the individual masks being compared. In one embodiment, when any two masks are summed using modulo-2 arithmetic, the Walsh transformation of that sum results in a maximally flat Walsh spectrum. For cellular radio telephone systems using subtractive CDMA demodulation techniques, a two-tier ciphering system ensures security at the cellular system level by using a pseudorandomly generated code key to select one of the scrambling masks common to all of the mobile stations in a particular cell. Also, privacy at the individual mobile subscriber level is ensured by using a pseudorandomly generated ciphering key to encipher individual information signals before the scrambling operation.

29. 发明授权

US5353352A Multiple access coding for radio communications 失效
标题翻译：无线电通信的多址接入编码
公开(公告)号：US5353352A
公开(公告)日：1994-10-04
申请号：US866865
申请日：1992-04-10
申请人： Paul W. Dent , Gregory E. Bottomley
发明人： Paul W. Dent , Gregory E. Bottomley
IPC分类号： H04Q7/38 , H04B1/707 , H04J11/00 , H04J13/00 , H04L1/00 , H04L9/00 , H04K1/00
CPC分类号： H04L1/0057 , H04B1/707 , H04J13/0048 , H04L9/00 , H04L2209/04 , H04L2209/34
摘要： Individual information signals encoded with a common block error-correction code are assigned a unique scrambling mask, or signature sequence, taken from a set of scrambling masks having selected correlation properties. The set of scrambling masks is selected such that the correlation between the modulo-2 sum of two masks with any codeword in the block code is a constant magnitude, independent of the mask set and the individual masks being compared. In one embodiment, when any two masks are summed using modulo-2 arithmetic, the Walsh transformation of that sum results in a maximally flat Walsh spectrum. For cellular radio telephone systems using subtractive CDMA demodulation techniques, a two-tier ciphering system ensures security at the cellular system level by using a pseudorandomly generated code key to select one of the scrambling masks common to all of the mobile stations in a particular cell. Also, privacy at the individual mobile subscriber level is ensured by using a pseudorandomly generated ciphering key to encipher individual information signals before the scrambling operation.
摘要翻译：对具有公共块纠错码编码的个别信息信号被分配从具有所选相关特性的一组加扰掩码中获得的唯一加密掩码或签名序列。选择这组加扰掩码，使得两个掩模的模2之和与块码中的任何码字之间的相关性是恒定的幅度，与掩模集合和被比较的各个掩码无关。在一个实施例中，当使用模2算术对任何两个掩模求和时，该和的沃尔什变换导致最大平均沃尔什频谱。对于使用减法CDMA解调技术的蜂窝无线电话系统，双层加密系统通过使用伪随机生成的代码密钥来选择蜂窝系统级别中的安全性，以选择特定小区中所有移动台公共的加扰掩码之一。此外，通过在加扰操作之前使用伪随机生成的加密密钥来加密各个信息信号来确保个人移动用户级别的隐私。

30. 发明授权

US07773950B2 Benign interference suppression for received signal quality estimation 有权
标题翻译：接收信号质量估计的良性干扰抑制
公开(公告)号：US07773950B2
公开(公告)日：2010-08-10
申请号：US10869527
申请日：2004-06-16
申请人： Yi-Pin Eric Wang , Gregory E. Bottomley , Rajaram Ramesh
发明人： Yi-Pin Eric Wang , Gregory E. Bottomley , Rajaram Ramesh
IPC分类号： H04B17/00
CPC分类号： H04L1/20 , H04B2201/709727 , H04L1/0003 , H04L1/0026 , H04L1/206
摘要： A receiver circuit suppresses effects of “benign” impairment from the calculation of received signal quality estimates, such that the estimate depends primarily on the effects of non-benign impairment. For example, a received signal may be subject to same-cell and other-cell interference plus noise, which is generally modeled using a Gaussian distribution, and also may be due to certain forms of self-interference, such as quadrature phase interference arising from imperfect derotation of the pilot samples used to generate channel estimates for the received signal. Such interference generally takes on a distribution defined by the pilot signal modulation, e.g., a binomial distribution for binary phase shift keying modulation. Interference arising from such sources is relatively “benign” as compared to Gaussian interference and thus should be suppressed or otherwise discounted in signal quality calculations. Suppression may be based on subtracting benign impairment correlation estimates from total impairment correlation estimates, or on filtering the benign impairment in channel estimation.
摘要翻译：接收机电路抑制从接收到的信号质量估计的计算中的“良性”损伤的影响，使得估计主要取决于非良性损伤的影响。例如，接收到的信号可以经受相同小区和其他小区干扰加噪声，其通常使用高斯分布来建模，并且还可能是由于某些形式的自干扰，例如由用于产生接收信号的信道估计的导频样本的不完全解旋。这种干扰通常采用由导频信号调制定义的分布，例如二进制相移键控调制的二项分布。与高斯干扰相比，从这些源产生的干扰相对“良性”，因此在信号质量计算中应被抑制或以其他方式折扣。抑制可以基于从总损伤相关性估计中减去良性损伤相关估计，或者在滤波信道估计中的良性损伤。

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