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公开(公告)号：US5237586A
公开(公告)日：1993-08-17
申请号：US857433
申请日：1992-03-25
申请人： Gregory E. Bottomley
发明人： Gregory E. Bottomley
IPC分类号： H04B1/00 , H04B1/10 , H04B1/709 , H04B1/7115 , H04B1/7117 , H04B1/712
CPC分类号： H04B1/7115 , H04B1/709 , H04B1/7117 , H04B1/712
摘要： A modified RAKE receiver, referred to as a WRAKE receiver, is used in CDMA communications. It is particularly adaptable to a subtractive CDMA system. The receiver includes a radio receiver for receiving and demodulating a composite signal of overlapping transmitted signals (spread signals), a sampler to sample the received signals, a selector for selecting different groups of samples, a correlator for correlating the samples with known despreading codes and a comparator to determine the symbol transmitted. The receiver also includes a combiner which combines either different groups of samples together or combines different correlation values together. The sample groups selected are channel independent and combine data received from different time shifts. Likewise, the sample groups for each channel and the correlation values are time-of-arrival independent.
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62.发明授权Method and apparatus for symbol detection via reduced complexity sequence estimation processing 有权通过降低复杂度序列估计处理的符号检测方法和装置公开(公告)号：US08559561B2
公开(公告)日：2013-10-15
申请号：US12035932
申请日：2008-02-22
申请人： Gregory E. Bottomley
发明人： Gregory E. Bottomley
IPC分类号： H04L27/00
CPC分类号： H04L25/03292
摘要： Teachings presented herein offer the performance advantages of sequence estimation for received signal symbol detection, while simultaneously providing potentially significant reductions in computational overhead. Initial demodulation of a received signal identifies a reduced number of candidate symbol values for all or a subset of a sequence of symbols represented in a received signal. A sequence estimation process, e.g., an MLSE process, constrains its state spaces to the reduced number of candidate symbols values, rather than considering all possible symbol values.
摘要翻译： 本文提供的教学提供了接收信号符号检测的序列估计的性能优势，同时提供潜在的显着降低计算开销。 接收信号的初始解调识别在接收信号中表示的符号序列的全部或子集的候选符号值的减少数量。 序列估计过程，例如MLSE过程，将其状态空间限制为减少的候选符号值的数量，而不是考虑所有可能的符号值。
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公开(公告)号：US08498325B2
公开(公告)日：2013-07-30
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。
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64.发明授权公开(公告)号：US08295330B2
公开(公告)日：2012-10-23
申请号：US12177498
申请日：2008-07-22
申请人： Ning He , Gregory E. Bottomley , Erik Larsson
发明人： Ning He , Gregory E. Bottomley , Erik Larsson
IPC分类号： H04B1/00
CPC分类号： H04B1/712 , H04B2201/709727
摘要： According to the teachings presented herein, a method and apparatus for communication signal processing advantageously use a mix of parametric and non-parametric correlation estimation in communication signal processing. Non-parametric estimation generates an “overall” correlation estimate for a received communication signal, and parametric estimation generates a “component” correlation estimate. The component correlation estimate is removed from the overall correlation estimate to form a partial correlation estimate that is used to process the received communication signal at least initially, such as in a pre-equalization stage. The overall and component correlation estimates are generated as impairment and/or data correlation estimates.
摘要翻译： 根据本文给出的教导，用于通信信号处理的方法和装置有利地在通信信号处理中使用参数和非参数相关估计的混合。 非参数估计对接收到的通信信号产生总体相关估计，参数估计产生分量相关估计。 从总体相关估计中去除分量相关估计，以形成一个部分相关估计，该估计用于至少最初处理接收的通信信号，例如在预均衡阶段。 总体和分量相关估计是作为减值和/或数据相关估计产生的。
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公开(公告)号：US08179988B2
公开(公告)日：2012-05-15
申请号：US12278186
申请日：2006-02-03
CPC分类号： H04L25/022 , H04L5/0017 , H04L5/0023 , H04L27/2607 , H04L27/265 , H04L27/2653 , H04L27/2662 , H04W16/14
摘要： Method, communication system, receiver, baseband processor and computer program for recovering data from a received OFDM-signal containing recurrent redundant information where part of the recurrent redundant information is used to maximize the SINR (Signal to Interference plus Noise Ratio) of the received OFDM-signal.
摘要翻译： 方法，通信系统，接收机，基带处理器和计算机程序，用于从接收的包含循环冗余信息的OFDM信号中恢复数据，其中部分循环冗余信息用于使接收的OFDM的SINR（信号干扰加噪声比）最大化 -信号。
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公开(公告)号：US08126043B2
公开(公告)日：2012-02-28
申请号：US12035846
申请日：2008-02-22
CPC分类号： H04L25/03203 , H04B1/7105 , H04L25/03248 , H04L25/03318 , H04L2025/0342
摘要： Teachings presented herein combine the relative simplicity of equalization with the performance of maximum likelihood (ML) processing. These teachings are applied to the detection of symbols in a stream of symbol blocks. In one or more embodiments, block-based equalization, including feedforward filtering, suppresses inter-block interference and produces detection statistics for the symbols in each symbol block, and joint detection addresses intra-block interference by jointly detecting the most likely combination of symbols within each symbol block, based on the corresponding detection statistics. The joint detection obviates the need to address intra-block interference within the equalization filters, while, at the same time, the block-based equalization produces detection statistics for each symbol block thereby simplifying the joint detection process. Overall complexity is less than would be needed for full MLSE processing of the symbol blocks without equalization preprocessing, while performance is close to or on par with full MLSE processing.
摘要翻译： 本文提出的教学将均衡的相对简单性与最大似然（ML）处理的性能相结合。 这些教导应用于符号块流中符号的检测。 在一个或多个实施例中，包括前馈滤波的基于块的均衡抑制块间干扰并且产生每个符号块中的符号的检测统计，并且联合检测通过联合检测在块内干扰中最可能的符号组合 每个符号块，根据相应的检测统计。 联合检测不需要解决均衡滤波器内的块内干扰，同时基于块的均衡产生每个符号块的检测统计量，从而简化了联合检测过程。 总体复杂度小于没有均衡预处理的符号块的全MLSE处理所需要的，而性能接近于或与完全MLSE处理相当。
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公开(公告)号：US20110206107A1
公开(公告)日：2011-08-25
申请号：US12709294
申请日：2010-02-19
CPC分类号： H04B17/336
摘要： An SIR estimate of a communication signal in a wireless communication system receiver is calculated based on soft bit values output by a nonlinear detector. The average amplitude of the detector output soft bits is estimated. The average power of the detector output soft bits is estimated, e.g., as a mean-square or variance. An SIR of the communication signal is estimated based on the soft bit amplitude and power estimates. In particular, the SIR is estimated as the ratio of the square of soft bit amplitude to the difference between the mean square soft bit power and the square of soft bit amplitude, or the ratio of the square of soft bit amplitude to the variance. In either case, the SIR estimate may be scaled to obtain the desired units. The communication signal may be a received signal, or a simulated signal generated using channel estimates obtained from, e.g., a pilot channel.
摘要翻译： 基于由非线性检测器输出的软比特值来计算无线通信系统接收机中的通信信号的SIR估计。 估计检测器输出软比特的平均幅度。 估计检测器输出软比特的平均功率例如作为均方或方差。 基于软比特幅度和功率估计来估计通信信号的SIR。 特别地，SIR被估计为软比特幅度的平方与平均软比特功率和软比特幅度的平方之间的差或软比特幅度的平方与差异的比的比率。 在任一情况下，可以缩放SIR估计以获得所需单位。 通信信号可以是接收信号，或使用从例如导频信道获得的信道估计而产生的模拟信号。
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68.发明授权Method and apparatus for code power parameter estimation for received signal processing 有权用于接收信号处理的码功率参数估计方法和装置公开(公告)号：US07995641B2
公开(公告)日：2011-08-09
申请号：US11935840
申请日：2007-11-06
IPC分类号： H04B1/00
CPC分类号： H04B1/7103 , H04B1/712 , H04B2201/709727
摘要： As taught herein channelization code power estimates are generated for a number of data channels in a received CDMA signal based on a joint determination process. Joint processing in this context yields improved estimation of data channel code powers and corresponding estimations of noise variance. These improvements arise from exploitation of joint processing of measured data value correlations across two or more data channel codes represented in the received signal. In one or more embodiments, joint determination of data channel code powers comprises forming a correlation matrix as a weighted average of correlations determined for a plurality of data channels. In one or more other embodiments, joint determination of data channel code powers comprises jointly fitting the correlation matrices for a plurality of data channels in a least squares error estimation process.
摘要翻译： 如本文所教导的，基于联合确定过程，对接收的CDMA信号中的多个数据信道生成信道化码功率估计。 在这种情况下的联合处理可以改善数据信道码功率的估计和噪声方差的相应估计。 这些改进是由于在接收到的信号中表示的两个或多个数据信道代码之间对测量的数据值相关性的联合处理的利用。 在一个或多个实施例中，数据信道码功率的联合确定包括形成相关矩阵作为为多个数据信道确定的相关性的加权平均值。 在一个或多个其他实施例中，数据信道码功率的联合确定包括在最小二乘误差估计过程中共同拟合多个数据信道的相关矩阵。
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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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70.发明授权Method and apparatus for suppressing interference based on channelization code power estimation with bias removal 有权基于具有偏移去除的信道化码功率估计的抑制干扰的方法和装置公开(公告)号：US07751463B2
公开(公告)日：2010-07-06
申请号：US11566756
申请日：2006-12-05
IPC分类号： H04B1/00
CPC分类号： H04B1/712
摘要： Processing in a baseband processor is improved by estimating channelization code powers when processing received signals and reducing at least one of interference and noise power from the code power estimates. According to one embodiment of a wireless communication device such as a mobile phone or Local Area Network (LAN) adapter, the device comprises circuitry configured to receive a composite signal having contributions from a signal of interest and one or more interfering signals and a baseband processor. The baseband processor is configured to estimate channelization code powers for a channelization code associated with the signal of interest and one or more channelization codes associated with the one or more interfering signals. The baseband processor is also configured to reduce at least one of interference and noise power from the channelization code power estimates.
摘要翻译： 通过在处理接收到的信号时估计信道化码功率并且从代码功率估计中减少干扰和噪声功率中的至少一个来改善基带处理器中的处理。 根据诸如移动电话或局域网（LAN）适配器的无线通信设备的一个实施例，该设备包括被配置为接收具有来自感兴趣的信号和一个或多个干扰信号的贡献的复合信号的电路和基带处理器 。 基带处理器被配置为估计与感兴趣的信号相关联的信道化码和与一个或多个干扰信号相关联的一个或多个信道化码的信道化码功率。 基带处理器还被配置为从信道化码功率估计中减少干扰和噪声功率中的至少一个。
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