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。

公开(公告)号：US5550809A

公开(公告)日：1996-08-27

申请号：US291693

申请日：1994-08-16

申请人： Gregory E. Bottomley ,  Paul W. Dent

发明人： Gregory E. Bottomley ,  Paul W. Dent

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： Information symbols spread using orthogonal or bi-orthogonal codewords are assigned a unique scramble mask that is taken from a set of scramble masks having selected correlation properties. The set of scramble masks is selected such that the correlation between the modulo-2 sum of two scramble masks with any codeword is a constant magnitude, independent of the codeword 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 scramble 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： 使用正交或双正交码字扩展的信息符号被分配为从具有所选相关属性的一组加扰掩码取得的唯一加扰掩码。 选择这组加扰掩码，使得两个加扰掩模与任何码字的模2之和之间的相关性是恒定的量级，与码字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在特定小区中的所有移动站公共的加密掩码之一来确保蜂窝系统级的安全性。 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。

公开(公告)号：US09226249B2

公开(公告)日：2015-12-29

申请号：US12513972

申请日：2006-11-07

申请人： Girum Alebachew ,  Carmela Cozzo ,  Gregory E. Bottomley ,  Fredrik Huss ,  Gunnar Peters

发明人： Girum Alebachew ,  Carmela Cozzo ,  Gregory E. Bottomley ,  Fredrik Huss ,  Gunnar Peters

IPC分类号： H04B1/707 ,  H04W52/60 ,  H04B1/712 ,  H04W52/24

CPC分类号： H04W52/60 ,  H04B1/712 ,  H04B2201/709727 ,  H04W52/241

摘要： The present invention relates to a receiver comprising a fast power control unit, said fast power control unit being arranged to continuously control a quality measure of a radio channel. The receiver is characterized in that the quality measure is a modified Signal to Interference plus noise ratio (SIR) in which the influence from self interference has been removed. The invention further relates to a method for continuously controlling a quality measure of a radio channel, wherein a modified Signal to Interference plus noise ratio (SIR) is continuously determined in which the influence from self interference has been removed.

摘要翻译： 本发明涉及包括快速功率控制单元的接收机，所述快速功率控制单元被布置成连续地控制无线电信道的质量测量。 接收机的特征在于，质量测量是修改的信号与干扰加噪声比（SIR），其中已经去除了自身干扰的影响。 本发明还涉及一种用于连续地控制无线电信道的质量测量的方法，其中连续地确定修改的信号与干扰加噪声比（SIR），其中已经去除了自身干扰的影响。

公开(公告)号：US08712464B2

公开(公告)日：2014-04-29

申请号：US13008523

申请日：2011-01-18

申请人： Lennart Andersson ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley

发明人： Lennart Andersson ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley

IPC分类号： H04B7/00

CPC分类号： H04W52/56 ,  H04B17/336 ,  H04B2201/709727 ,  H04W52/12

摘要： A wireless communication device or system generates transmit power control feedback for a received power control channel by determining a command error rate (CER), or by identifying a target signal quality for the power control channel according to a defined signal-quality-to-CER mapping function. Generally, the power control channel does not include error-coded data to use for CER estimation. However, in one embodiment, the channel does include known reference bits that are evaluated for CER estimation, with the estimated CER used to set the signal quality target for inner loop power control. In other embodiments, a computed reception error probability is used to identify a CER estimate according to a defined probability-to-CER mapping function. By way of non-limiting example, these embodiments may be used to provide power control feedback for power control commands transmitted on a Fractional Dedicated Physical Channel in WCDMA systems.

摘要翻译： 无线通信设备或系统通过确定命令错误率（CER）或者通过根据定义的信号质量到CER来识别功率控制信道的目标信号质量来为接收到的功率控制信道生成发射功率控制反馈 映射功能。 通常，功率控制信道不包括用于CER估计的错误编码数据。 然而，在一个实施例中，信道确实包括对CER估计进行评估的已知参考比特，其中估计的CER用于设置用于内环功率控制的信号质量目标。 在其他实施例中，使用计算的接收错误概率来根据所定义的概率到CER映射函数来识别CER估计。 作为非限制性示例，这些实施例可以用于为在WCDMA系统中的分数专用物理信道上发送的功率控制命令提供功率控制反馈。

公开(公告)号：US08295329B2

公开(公告)日：2012-10-23

申请号：US11850837

申请日：2007-09-06

申请人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Karl J. Molnar

发明人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Karl J. Molnar

IPC分类号： H04B1/00

CPC分类号： H04B1/71055 ,  H04B1/7115 ,  H04B2201/709727

摘要： A symbol detector converts initial symbol estimates of received symbols to soft estimates for decoding. The symbol detector computes spreading waveform correlations between a spreading waveform for a symbol of interest and spreading waveforms for one or more interfering symbols. Interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating for noise. A soft scaling factor for the symbol of interest is computed from the interference rejection terms. The soft scaling factors are then applied to the initial symbol estimates to generate the soft estimates.

摘要翻译： 符号检测器将接收符号的初始符号估计转换为用于解码的软估计。 符号检测器计算感兴趣符号的扩展波形和一个或多个干扰符号的扩展波形之间的扩展波形相关性。 通过相应的信号功率缩放扩展波形相关性并补偿噪声来计算干扰抑制项。 根据干扰抑制项计算感兴趣符号的软缩放因子。 然后将软缩放因子应用于初始符号估计以产生软估计。

公开(公告)号：US08102950B2

公开(公告)日：2012-01-24

申请号：US12058082

申请日：2008-03-28

申请人： Paul Wilkinson Dent ,  Gregory E. Bottomley

发明人： Paul Wilkinson Dent ,  Gregory E. Bottomley

IPC分类号： H04L27/06

CPC分类号： H04J13/00 ,  H04B1/7105 ,  H04J13/102 ,  H04L25/03057 ,  H04L25/067 ,  H04L2025/0342

摘要： Where two or more multi-valued digital data symbols are modulated so that they overlap after passing through a channel, forming a combined signal, a receiver receives the combined signal and forms detection statistics to attempt to recover the symbols. Where forming detection statistics does not completely separate the symbols, each statistic comprises a different mix of the symbols. A receiver determines the symbols which, when mixed in the same way, reproduce or explain the statistics most closely. For example, the receiver hypothesizes all but one of the symbols and subtracts the effect of the hypothesized symbols from the mixed statistics. The remainders are combined and quantized to the nearest value of the remaining symbol. For each hypothesis, the remaining symbol is determined. A metric is then computed for each symbol hypothesis including the so-determined remaining symbol, and the symbol set producing the best metric is chosen as the decoded symbols.

摘要翻译： 当调制两个或更多个多值数字数据符号以使得它们在通过信道之后重叠时，形成组合信号，接收器接收组合信号并形成检测统计信息以尝试恢复符号。 在形成检测统计信息不完全分离符号的情况下，每个统计量包括符号的不同混合。 接收者确定在以相同的方式混合时，最接近地重现或解释统计信息的符号。 例如，接收方假设除符号之外的所有符号，并从混合统计中减去假设符号的影响。 余数被组合并量化为剩余符号的最接近的值。 对于每个假设，确定剩余符号。 然后针对包括所确定的剩余符号的每个符号假设计算度量，并且选择产生最佳度量的符号集作为解码符号。

公开(公告)号：US08046657B2

公开(公告)日：2011-10-25

申请号：US11451724

申请日：2006-06-13

申请人： Hanna Johannesson ,  Ali S. Khayrallah ,  Gregory E. Bottomley

发明人： Hanna Johannesson ,  Ali S. Khayrallah ,  Gregory E. Bottomley

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。

公开(公告)号：US07920619B2

公开(公告)日：2011-04-05

申请号：US11739924

申请日：2007-04-25

申请人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Douglas A. Cairns

发明人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Douglas A. Cairns

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。

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。

公开(公告)号：US07778312B2

公开(公告)日：2010-08-17

申请号：US11402676

申请日：2006-04-12

申请人： Douglas A. Cairns ,  Gregory E. Bottomley

发明人： Douglas A. Cairns ,  Gregory E. Bottomley

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）。