-
公开(公告)号：US07920619B2
公开(公告)日：2011-04-05
申请号：US11739924
申请日：2007-04-25
IPC分类号： H04B1/00
CPC分类号： H04L25/024 , H04B1/7105 , H04B2201/709727
摘要： A method and apparatus for reducing the complexity of waveform correlation computations used by a multicode receiver is described herein. One exemplary multicode receiver includes a despreading unit, channel estimator, and waveform correlation calculator. The despreading unit despreads a received multicode signal to generate despread symbols. The channel estimator estimates channel coefficients associated with the despread symbols. The waveform correlation calculator determines waveform correlations between the transmitted symbols in successive processing windows that span two or more symbol periods and that overlap in time. To reduce the computational complexity associated with computing waveform correlations, the calculator may reuse channel coefficients and/or net channel correlations for multiple symbol periods and/or processing windows. The calculator may also reduce complexity by reusing one or more waveform correlations from a previous processing window as waveform correlations for one or more subsequent processing windows and/or by exploiting the Hermitian symmetry of the waveform correlation matrix.
摘要翻译： 这里描述了一种降低多码接收机使用的波形相关计算的复杂度的方法和装置。 一个示例性多码接收机包括解扩单元，信道估计器和波形相关计算器。 解扩单元对接收到的多码信号进行解扩，以产生解扩符号。 信道估计器估计与解扩符号相关联的信道系数。 波形相关计算器确定跨越两个或多个符号周期并且在时间上重叠的连续处理窗口中的发送符号之间的波形相关性。 为了减少与计算波形相关性相关联的计算复杂度，计算器可以重用多个符号周期和/或处理窗口的信道系数和/或净信道相关性。 计算器还可以通过将来自先前处理窗口的一个或多个波形相关作为一个或多个后续处理窗口的波形相关性和/或通过利用波形相关矩阵的埃米特对称来重新降低复杂度。
-
52.发明授权Method and apparatus for selecting demodulation processing delays in a receiver 有权用于选择接收机中的解调处理延迟的方法和装置公开(公告)号：US07778312B2
公开(公告)日：2010-08-17
申请号：US11402676
申请日：2006-04-12
IPC分类号： H04B1/00
CPC分类号： H04L25/03044 , H04B1/7117 , H04B1/712 , H04B2201/70707 , H04B2201/709727 , H04L2025/03477 , H04L2025/03515
摘要： A receiver includes a baseband processor for selecting a set of demodulation processing delays for received signal demodulation from a larger set of candidate delays. In one embodiment, the baseband processor selects the set of demodulation processing delays by calculating at least one metric for each demodulation processing delay in the set of candidate delays, iteratively reducing the set of candidate delays by eliminating one or more demodulation processing delays from the set as a function of comparing the metrics, and setting the processing delays for received signal demodulation to the candidate delays remaining after reduction. In a Generalized RAKE (G-RAKE) embodiment, the metric corresponds to combining weight magnitudes associated with G-RAKE finger delays. In a chip equalizer embodiment, the metric corresponds to coefficient magnitudes associated with equalization filter tap delays. In other embodiments, the metric corresponds to Signal to Interference Ratios (SIRs) associated with the set of candidate delays.
摘要翻译： 接收机包括基带处理器，用于从更大的一组候选延迟中选择用于接收信号解调的一组解调处理延迟。 在一个实施例中，基带处理器通过针对候选延迟集合中的每个解调处理延迟计算至少一个度量来选择一组解调处理延迟，通过从集合中消除一个或多个解调处理延迟来迭代地减少候选延迟集合 作为比较度量的函数，以及将接收信号解调的处理延迟设置为在还原之后剩余的候选延迟。 在广义RAKE（G-RAKE）实施例中，度量对应于与G-RAKE手指延迟相关联的重量幅度。 在码片均衡器实施例中，度量对应于与均衡滤波器抽头延迟相关联的系数幅度。 在其他实施例中，度量对应于与该组候选延迟相关联的信号与干扰比（SIR）。
-
53.发明授权Method and apparatus for selecting signal processing delays based on historical selection data 有权基于历史选择数据选择信号处理延迟的方法和装置公开(公告)号：US07751467B2
公开(公告)日：2010-07-06
申请号：US11566256
申请日：2006-12-04
IPC分类号： H04B1/00
CPC分类号： H04B1/7113 , H04B1/7117 , H04B1/712 , H04B2201/709727
摘要： Signal processing delays are selected from a candidate set in a wireless receiver based on both present and past channel behavior. According to one embodiment, a subset of signal processing delays are selected for received signal processing by accumulating a history of periodic delay selection computations for a candidate set of signal processing delays during a time interval. The delay selection calculations are based on cross-correlations between different ones of the signal processing delays. At the end of the time interval, a subset of the signal processing delays are selected from the candidate set of delays for received signal processing based on the history of delay selection computations.
摘要翻译： 基于现在和过去的信道行为，从无线接收机中的候选集中选择信号处理延迟。 根据一个实施例，通过在时间间隔期间累积用于信号处理延迟的候选组的周期性延迟选择计算的历史来选择信号处理延迟的子集用于接收信号处理。 延迟选择计算基于不同信号处理延迟之间的互相关。 在时间间隔结束时，基于延迟选择计算的历史，从用于接收信号处理的候选延迟集中选择信号处理延迟的子集。
-
54.发明授权Method and apparatus for interference estimation in a generalized RAKE receiver 有权广义RAKE接收机中干扰估计的方法和装置公开(公告)号：US07688881B2
公开(公告)日：2010-03-30
申请号：US11479483
申请日：2006-06-30
IPC分类号： H04B1/707
CPC分类号： H04B1/712 , H04B2201/709727
摘要： According to one embodiment taught herein, a method of determining impairment correlations between a plurality of delays of interest for a received CDMA signal comprises generating kernel functions as samples of a net channel response of the received CDMA signal taken at defined chip sampling phases for delay differences between the plurality of delays of interest. In a parametric Generalized Rake (G-Rake) receiver embodiment, the delays of interest represent the delay positions of the fingers being used to characterized received signal. In a chip equalizer receiver embodiment, the delays of interest represent the delay positions of the equalizer taps. The method continues with determining impairment correlations based on convolving the kernel functions. Corresponding receiver circuits, including an impairment correlation estimation circuit configured for parametric G-Rake operation, may be implemented in a variety of communication devices and systems, such as in wireless communication network base stations and mobile stations.
摘要翻译： 根据本文教导的一个实施例，确定接收的CDMA信号的多个感兴趣延迟之间的损害相关性的方法包括：生成内核函数，作为在限定的码片采样相位处采用的接收CDMA信号的净信道响应的样本，用于延迟差 在多个感兴趣的延迟之间。 在参数广义耙（G-Rake）接收机实施例中，感兴趣的延迟表示用于指定的接收信号的手指的延迟位置。 在码片均衡器接收器实施例中，感兴趣的延迟表示均衡器抽头的延迟位置。 该方法继续确定基于卷积核函数的损害相关性。 包括配置用于参数G-Rake操作的损害相关估计电路的对应的接收器电路可以在诸如无线通信网络基站和移动站中的各种通信设备和系统中实现。
-
公开(公告)号：US20090185603A1
公开(公告)日：2009-07-23
申请号：US12016608
申请日：2008-01-18
IPC分类号： H04B1/00
CPC分类号： H04B1/712 , H04B2201/709727
摘要： The teachings presented herein improve the processing of individual signals of interest included in a received composite signal by computing combining weights and/or signal quality estimates for each signal of interest, e.g., for linear equalization, based on either shared or non-shared correlation estimates. As a non-limiting advantage, the use of shared correlation estimates reduces computational loading as compared to the processing load that would be needed for computing non-shared correlation estimates for all signals of interest. As a further non-limiting advantage, the conditional use of shared and non-shared correlation estimates provides for the use of non-shared correlation estimates where signal characteristic(s) of one or more of the signals of interest warrant such usage, e.g., for one or more high-rate signals of interest.
摘要翻译： 本文提出的教导通过基于共享或非共享相关估计来计算每个感兴趣信号的组合权重和/或信号质量估计，例如用于线性均衡，来改进包括在接收到的复合信号中的感兴趣的各个信号的处理 。 作为非限制性优点，与用于计算所有感兴趣的信号的非共享相关估计所需的处理负载相比，共享相关估计的使用减少了计算负载。 作为进一步的非限制性优点，共享和非共享相关估计的条件使用提供了使用非共享相关估计，其中一个或多个感兴趣信号的信号特征允许这种使用，例如， 用于一个或多个感兴趣的高速率信号。
-
56.发明授权Method and apparatus for using chip sample correlations in one or more received signal processing operations 有权在一个或多个接收的信号处理操作中使用芯片样本相关的方法和装置公开(公告)号：US07486716B2
公开(公告)日：2009-02-03
申请号：US11158665
申请日：2005-06-22
IPC分类号： H04B1/00
CPC分类号： H04B1/712 , H04B2201/709727
摘要： A wireless communication receiver obtains improved performance under certain fast fading conditions by basing one or more received signal processing operations on pre-despreading chip sample correlations rather than on post-despreading noise correlations, but preserves soft scaling information by determining one or more scaling factors that relate the chip sample correlations to the noise correlations. By way of non-limiting examples, a Generalized RAKE receiver circuit may base combining weight generation on chip sample correlations rather than on post-despreading pilot symbol noise correlations, but scale the combining weights as a function of the one or more scaling factors, or, equivalently, scale the combined values generated from the combining weights. Similar scaling may be performed with respect to chip equalization filter combining weights in a chip equalization receiver circuit. Further, Signal-to-Interference Ratio (SIR) estimation may be improved in terms of fast fading responsiveness by using chip sample correlations, while preserving the proper scaling.
摘要翻译： 无线通信接收机在某些快速衰落条件下通过将一个或多个接收到的信号处理操作基于预先解扩展芯片样本相关而不是后解扩噪声相关来获得改进的性能，但是通过确定一个或多个缩放因子来保留软缩放信息， 将芯片样本相关性与噪声相关性相关联。 作为非限制性示例，广义RAKE接收机电路可以基于片上样本相关的权重生成而不是去扩展导频符号噪声相关，但是将组合权重缩放为一个或多个缩放因子的函数，或 相等地，缩放从组合权重生成的组合值。 可以针对芯片均衡接收器电路中的码片均衡滤波器组合权重执行类似的缩放。 此外，通过使用芯片样本相关性，在保持适当的缩放的同时，可以在快速衰落响应性方面改善信号干扰比（SIR）估计。
-
公开(公告)号：US20080267261A1
公开(公告)日：2008-10-30
申请号：US11739924
申请日：2007-04-25
IPC分类号： H04B1/69
CPC分类号： H04L25/024 , H04B1/7105 , H04B2201/709727
摘要： A method and apparatus for reducing the complexity of waveform correlation computations used by a multicode receiver is described herein. One exemplary multicode receiver includes a despreading unit, channel estimator, and waveform correlation calculator. The despreading unit despreads a received multicode signal to generate despread symbols. The channel estimator estimates channel coefficients associated with the despread symbols. The waveform correlation calculator determines waveform correlations between the transmitted symbols in successive processing windows that span two or more symbol periods and that overlap in time. To reduce the computational complexity associated with computing waveform correlations, the calculator may reuse channel coefficients and/or net channel correlations for multiple symbol periods and/or processing windows. The calculator may also reduce complexity by reusing one or more waveform correlations from a previous processing window as waveform correlations for one or more subsequent processing windows and/or by exploiting the Hermitian symmetry of the waveform correlation matrix.
摘要翻译： 这里描述了一种降低多码接收机使用的波形相关计算的复杂度的方法和装置。 一个示例性多码接收机包括解扩单元，信道估计器和波形相关计算器。 解扩单元对接收到的多码信号进行解扩，以产生解扩符号。 信道估计器估计与解扩符号相关联的信道系数。 波形相关计算器确定跨越两个或多个符号周期并且在时间上重叠的连续处理窗口中的发送符号之间的波形相关性。 为了减少与计算波形相关性相关联的计算复杂度，计算器可以重用多个符号周期和/或处理窗口的信道系数和/或净信道相关性。 计算器还可以通过将来自先前处理窗口的一个或多个波形相关作为一个或多个后续处理窗口的波形相关性和/或通过利用波形相关矩阵的埃米特对称来重新降低复杂度。
-
公开(公告)号：US07099410B1
公开(公告)日：2006-08-29
申请号：US09237356
申请日：1999-01-26
IPC分类号： H04L27/06
CPC分类号： H04L25/03197 , H04L25/03299
摘要： The present invention involves demodulation of radio signals modulated with M-ary modulation in the presence of intersymbol interference distortion. The invention presents a method for reducing the number of multiplications needed to implement a maximum-likelihood-sequence-estimation (MLSE) equalizer for signals modulated with M-ary modulation. In exemplary embodiments of the present invention, the number of multiplications is reduced by pre-computing certain values needed for the determination of the branch metric and storing these pre-computed values in a product table. When a branch metric computation is to be made, whether it is an Euclidean branch metric computation or an Ungerboeck branch metric computation, certain multiplication operations are replaced by simple table look-up operations. As a result, the power efficiency and speed of the system are increased. Any receiver that demodulates signals that are modulated with M-ary modulation can be implemented using the present invention. The resulting demodulator will have a lower complexity than existing demodulators.
摘要翻译： 本发明涉及在存在符号间干扰失真的情况下解调用M进制调制的无线电信号。 本发明提出了一种用于减少对用M-ary调制调制的信号实现最大似然序列估计（MLSE）均衡器所需的乘法次数的方法。 在本发明的示例性实施例中，通过预先计算确定分支度量所需的某些值并将这些预先计算的值存储在产品表中来减少乘法次数。 当进行分支度量计算时，无论是欧几里德分支度量计算还是Ungerboeck分支度量计算，某些乘法运算都被简单的表查找操作所取代。 结果，系统的功率效率和速度增加。 可以使用本发明来实现解调通过M进制调制调制的信号的任何接收机。 所产生的解调器将具有比现有解调器更低的复杂度。
-
59.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。
-
60.发明授权Information generation for coherent demodulation of differentially encoded signals 失效用于差分编码信号的相干解调的信息生成公开(公告)号：US06487255B1
公开(公告)日：2002-11-26
申请号：US09143754
申请日：1998-08-31
IPC分类号： H04L512
CPC分类号： H04L25/03184 , H04L25/03318 , H04L2025/03375
摘要： Methods and systems are provided which generate hard and soft values from signal samples of a differentially encoded signal by estimating channel coefficients associated with the received signal and determining metrics for each possible symbol pair which indicate the probability of a possible coherent symbol pair being encoded in the signal samples using the estimated channel coefficients and the signal samples. Soft values associated with differential bits or differential symbols encoded in the samples of the signal are then generated based on the determined metrics.
摘要翻译： 提供了通过估计与接收信号相关联的信道系数并确定每个可能符号对的度量的方法和系统，其通过差分编码信号的信号样本产生硬和软值，其指示可能的相干符号对在 信号样本使用估计的信道系数和信号样本。 然后基于所确定的度量来生成与信号样本中编码的差分比特或差分符号相关联的软值。
-
-
-
-
-
-
-
-
-
搜索结果
159 条记录 (耗时 0.026 秒)
