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1.发明授权Apparatus, methods and computer program products for delay selection in a spread-spectrum receiver 有权用于扩频接收机中的延迟选择的装置，方法和计算机程序产品公开(公告)号：US07769078B2
公开(公告)日：2010-08-03
申请号：US10959923
申请日：2004-10-06
IPC分类号： H04B1/00
CPC分类号： H04B1/712 , H04B1/709 , H04B1/7117 , H04B2201/709727
摘要： Channel and correlation characteristics are determined for a composite signal. Respective combining weights for information from the composite signal are determined for respective ones of a plurality of candidate delays based on the determined channel and correlation characteristics. A group of delays, e.g., RAKE correlator delays or chip equalizer filter taps, is selected from the plurality of candidate delays based on the determined weights. Information from the composite signal for the selected delays is processed according to a spreading code to generate a symbol estimate. The invention may be embodied as methods, apparatus and computer program products.
摘要翻译： 为复合信号确定通道和相关特性。 基于确定的信道和相关特性，针对多个候选延迟中的各个确定来自复合信号的信息的相应组合权重。 基于所确定的权重，从多个候选延迟中选择一组延迟，例如RAKE相关器延迟或码片均衡器滤波器抽头。 根据扩展码处理来自所选延迟的复合信号的信息以产生符号估计。 本发明可以体现为方法，装置和计算机程序产品。
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公开(公告)号：US20110158359A1
公开(公告)日：2011-06-30
申请号：US12650219
申请日：2009-12-30
CPC分类号： H03M13/2987 , H03M13/2957 , H03M13/296 , H03M13/3707 , H03M13/6325 , H03M13/6561 , H03M13/658 , H03M13/6591 , H04L1/005 , H04L25/03286
摘要： An iterative demodulator and decoder uses feedback attenuation to maintain proper balance between the demodulator and decoder. Balance is maintained by attenuating the influence of extrinsic information fed back from the decoder to the demodulator to prevent strong decisions by the decoder from overwhelming the demodulator.
摘要翻译： 迭代解调器和解码器使用反馈衰减来维持解调器和解码器之间的适当平衡。 通过衰减从解码器反馈到解调器的外部信息的影响来维持平衡，以防止解码器强制解调器压倒解调器。
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公开(公告)号：US07587219B2
公开(公告)日：2009-09-08
申请号：US11167370
申请日：2005-06-27
IPC分类号： H04B7/00
CPC分类号： H04W52/322 , H04W52/247
摘要： A system and method for adapting a broadcast service in a cellular communication network. A base station receives indications of channel quality from registered users of the broadcast service, and adapts broadcast transmission parameters to improve channel quality for the broadcast users if at least one of the broadcast users indicates that channel quality needs to be improved. If none of the broadcast users indicates that channel quality needs to be improved, the base station adapts the transmission parameters to decrease channel quality for the broadcast users. The transmission parameters may be adapted by techniques such as changing the broadcast transmit power, changing the level of FEC encoding and modulation, changing the number of channel resources allocated, or changing the transmission data rate for the broadcast service. When multiple base stations transmit the broadcast information, a base station controller may minimize network resource utilization by coordinating adaptation control among the base stations.
摘要翻译： 一种用于在蜂窝通信网络中调整广播服务的系统和方法。 基站从广播服务的注册用户接收信道质量的指示，如果广播用户中的至少一个指示需要改善信道质量，则适应广播传输参数以改善广播用户的信道质量。 如果没有广播用户指示信道质量需要改善，则基站调整传输参数以降低广播用户的信道质量。 传输参数可以通过诸如改变广播发射功率，改变FEC编码和调制的等级，改变所分配的信道资源的数量，或者改变广播业务的传输数据速率的技术进行调整。 当多个基站发送广播信息时，基站控制器可以通过协调基站之间的自适应控制来最小化网络资源利用。
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4.发明授权Method and apparatus for canceling interference from high power, high data rate signals 有权消除高功率，高数据速率信号干扰的方法和装置公开(公告)号：US07389099B2
公开(公告)日：2008-06-17
申请号：US11112578
申请日：2005-04-22
IPC分类号： H04B1/18
CPC分类号： H04B1/7107 , H04B2201/709727
摘要： A method and apparatus in a radio receiver for canceling interference from a high power, high data rate signal received in a combined signal that includes a contribution from the high power signal and a contribution from a lower power signal. It is first determined whether the high power signal was correctly received. A CRC checksum may be used to determine whether the high power signal was received with a good reliability. Thereafter, the contribution of the high power signal is removed from the received signal only if the high power signal was correctly received. The contribution of the high power signal may be removed by hard-subtracting the contribution of the high power signal from the received signal if all of the bits of the checksum are correct, and soft-subtracting the contribution of the high power signal from the received signal if most, but not all, of the bits in the checksum are correct.
摘要翻译： 一种无线电接收机中的方法和装置，用于消除在包括来自高功率信号的贡献和来自低功率信号的贡献的组合信号中接收的高功率，高数据速率信号的干扰。 首先确定高功率信号是否正确接收。 可以使用CRC校验和来确定高功率信号是否以良好的可靠性被接收。 此后，仅当正确接收到高功率信号时，才从接收信号中去除高功率信号的贡献。 如果校验和的所有比特都正确，则可以通过从接收到的信号中硬减去高功率信号的贡献来消除高功率信号的贡献，并且从所接收到的功率信号中减去高功率信号的贡献 信号，如果校验和中的大多数但不是全部的位是正确的。
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5.发明授权公开(公告)号：US07142581B2
公开(公告)日：2006-11-28
申请号：US09800143
申请日：2001-03-06
IPC分类号： H04B15/00
CPC分类号： H04L1/0015 , H04B1/713 , H04B7/2621 , H04L1/0001 , H04L1/0003 , H04L1/0009
摘要： Methods and systems for selecting a frequency hopping mode for a communication in a communication system having a plurality of transmission schemes are provided. One of the plurality of transmission schemes to be used for the communication is determined. One of a plurality of candidate frequency hopping modes is selected as the frequency hopping mode for the communication based on the determined transmission scheme for the communication. Methods and systems for transmitting a communication packet in a communication system having a plurality of transmission schemes are also provided.
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6.发明授权Apparatus for and method of adapting a radio receiver using control functions 有权使用控制功能适应无线电接收机的装置和方法公开(公告)号：US06832080B1
公开(公告)日：2004-12-14
申请号：US09660050
申请日：2000-09-12
IPC分类号： H04B110
CPC分类号： H04B1/0003 , H04B1/1027 , H04B1/7105 , H04B2201/7071 , H04L1/0001 , H04L25/03178 , H04L25/03305 , H04L25/03331
摘要： An adaptive radio receiver utilizes control functions derived from received signals in an interference-limited environment to decide whether to implement conventional single-user demodulation or joint demodulation. The decision to implement joint or conventional demodulation is based upon the values of estimates derived for Doppler spread, carrier-to-interference plus noise, dispersiveness and the likelihood of the presence of a dominant interferer.
摘要翻译： 自适应无线电接收机利用在受干扰限制的环境中从接收信号导出的控制功能来决定是否实施传统的单用户解调或联合解调。 实施联合或常规解调的决定基于针对多普勒扩展，载波干扰加噪声，分散性和存在显着干扰源的可能性的估计值。
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公开(公告)号：US08046657B2
公开(公告)日：2011-10-25
申请号：US11451724
申请日：2006-06-13
IPC分类号： H03M13/45
CPC分类号： H03M13/05 , H03M13/11 , H03M13/255
摘要： According to a method and apparatus taught herein, a decoding circuit and method decode linear block codes based on determining joint probabilities for one or more related subsets of bits in received data blocks. The use of joint probabilities enables faster and more reliable determination of received bits, meaning that, for example, joint probability decoding requires fewer decoding iterations than a comparable decoding process based on single-bit probabilities. As a non-limiting example, the decoding circuit and method taught herein provide advantageous operation with Low Density Parity Check (LDPC) codes, and can be incorporated in a variety of communication systems and devices, such as those associated with wireless communication networks.
摘要翻译： 根据本文教导的方法和装置，解码电路和方法基于确定接收数据块中一个或多个相关的比特子集的联合概率来解码线性块码。 联合概率的使用使得能够更快更可靠地确定接收到的比特，这意味着例如，联合概率解码比基于单比特概率的可比较的解码过程需要更少的解码迭代。 作为非限制性示例，本文教导的解码电路和方法提供了具有低密度奇偶校验（LDPC）码的有利操作，并且可以并入各种通信系统和设备中，诸如与无线通信网络相关联的通信系统和设备。
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8.发明授权Method and apparatus for scaling parameter estimation in parametric generalized rake receivers 有权在参数化广义耙式接收机中缩放参数估计的方法和装置公开(公告)号：US07848389B2
公开(公告)日：2010-12-07
申请号：US11219626
申请日：2005-09-02
申请人： Carmela Cozzo , Douglas A. Cairns , Gregory E. Bottomley , Ali S. Khayrallah , Håkan B. Eriksson
发明人： Carmela Cozzo , Douglas A. Cairns , Gregory E. Bottomley , Ali S. Khayrallah , Håkan B. Eriksson
IPC分类号： H04B1/69
CPC分类号： H04B1/7103 , H04B1/712 , H04B2201/709727 , H04L25/0212 , H04L25/0222 , H04L25/0228
摘要： A wireless communication receiver, such as the receiver included in a wireless communication transceiver implemented in a base station or in a mobile station of a wireless communication network, includes a parametric G-RAKE receiver circuit and a method that compute parametric scaling parameters on a per transmission interval basis. In one embodiment, measured impairment correlations are obtained for an individual transmission slot and used to estimate instantaneous values of the scaling parameters. One or both of those instantaneous values are then constrained according to one or more defined limits. In other embodiments, multiple transmission slots are used to increase the number of measurements available to estimate the scaling parameters, with parameter constraining optionally applied. Further embodiments use iterative methods and/or solve for one parameter, and use the results to obtain the other parameter(s). One or more of these embodiments can be improved through the use of error correction/detection information.
摘要翻译： 无线通信接收机，例如包括在基站或无线通信网络的移动台中的无线通信收发器中的接收机，包括参数化的G-RAKE接收机电路和一个在每一个中计算参数缩放参数的方法 传输间隔的基础。 在一个实施例中，针对单个传输时隙获得测量的损害相关性，并用于估计缩放参数的瞬时值。 然后根据一个或多个限定的限制来限制那些瞬时值中的一个或两个。 在其他实施例中，使用多个传输时隙来增加可用于估计缩放参数的测量数量，并且可选地应用参数约束。 另外的实施例使用迭代方法和/或解决一个参数，并且使用结果来获得其他参数。 可以通过使用错误校正/检测信息来改进这些实施例中的一个或多个。
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9.发明授权System and method for Fast Walsh Transform processing in a multi-coded signal environment 有权用于多编码信号环境中快速沃尔什变换处理的系统和方法公开(公告)号：US07308019B2
公开(公告)日：2007-12-11
申请号：US10151682
申请日：2002-05-20
IPC分类号： H04L27/30
CPC分类号： H04B1/7115 , H04B1/7117 , H04B2001/70935 , H04B2201/70705 , H04B2201/70707 , H04B2201/709727 , H04J13/0048
摘要： A flexible Fast Walsh Transform circuit provides configurable FWT sizes, and is suitable for use in radio receivers where the received signal may be generated using varying spreading codes and/or varying numbers of multi-codes. Such signal types are commonly encountered in wireless communication systems like those based on the Wideband CDMA (W-CDMA) or IS-2000 (cdma2000) standards, and particularly with the higher data rate provisions of those standards. In one application, a RAKE receiver includes RAKE fingers that each include one of the flexible FWT circuits, such that each finger despreads the received signal using variably sized FWTs in accordance with the characteristics of the received signal. The flexibility in FWT sizing may derive from, for example, the inclusion of separately selectable but differently sized FWT circuits, or from the inclusion of a configurable FWT circuit capable of generating different sizes of FWTs.
摘要翻译： 灵活的快速沃尔什变换电路提供可配置的FWT大小，并且适用于无线电接收机，其中接收信号可以使用变化的扩展码和/或不同数量的多码来产生。 在诸如基于宽带CDMA（W-CDMA）或IS-2000（cdma2000）标准的无线通信系统中通常遇到这样的信号类型，特别是在这些标准的较高数据速率规定中。 在一个应用中，RAKE接收机包括RAKE指，其中每个包括柔性FWT电路之一，使得每个指根据接收信号的特性使用可变大小的FWT来解扩接收信号。 FWT尺寸的灵活性可以来自例如包括单独可选择但不同尺寸的FWT电路，或者包括能够产生不同大小的FWT的可配置FWT电路。
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公开(公告)号：US06597743B1
公开(公告)日：2003-07-22
申请号：US09454577
申请日：1999-12-07
IPC分类号： H04L2302
CPC分类号： H03M13/3955
摘要： A reduced search symbol estimation algorithm includes a forward recursion, a backward recursion, and a combining step. To reduce complexity, during the forward and backward recursions, the number of survivor states retained at each stage is less than the total number of states of the trellis. The survivor states are selected from a group of candidate states, that are connected by branches to survivors from the previous stage of the recursion. The decoder compares the accumulated path metrics for each candidate state and retains a specified number of states that is less than the total possible number of states. For the forward recursion, the retained states or survivor states, denoted as Qk, are stored along with the corresponding state metrics. For the backward recursion, the retained states, denoted as Rk, are stored along with the corresponding state metrics. During the combining step, the computation of a soft value is restricted to branches (s′,s) connecting survivor states s′ and s in the forward and backward recursions respectively.
摘要翻译： 减少的搜索符号估计算法包括正向递归，反向递归和组合步骤。 为了减少复杂性，在向前和向后递归期间，每个阶段保留的幸存者国家数量小于网格状态总数。 幸存者状态是从一组候选国中选出的，这些候选国通过分支到递归的前一阶段与幸存者相连。 解码器比较每个候选状态的累积路径度量，并保留小于总可能状态数的指定数量的状态。 对于正向递归，保留状态或幸存者状态（表示为Qk）与相应的状态度量一起存储。 对于反向递归，表示为Rk的保留状态与相应的状态度量一起存储。 在组合步骤中，软值的计算分别限制在向前和向后递归中连接幸存者状态s'和s的分支（s'，s）。
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