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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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64.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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66.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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公开(公告)号：US20100159838A1
公开(公告)日：2010-06-24
申请号：US12339967
申请日：2008-12-19
CPC分类号： H04B1/7103 , H04B7/0891
摘要： A node (e.g., base station, signal processing unit) is described herein that includes a symbol detector and a method which are capable of suppressing interference caused by one user device (which may be in softer handoff mode) to reduce performance degradation to other intra-cell user devices and/or other inter-cell user devices (which may not be in softer handoff mode).
摘要翻译： 本文描述了一种节点（例如，基站，信号处理单元），其包括能够抑制由一个用户设备（其可能处于更软切换模式）引起的干扰的符号检测器和方法，以降低其他内部 - 小区用户设备和/或其他小区间用户设备（其可能不处于更软切换模式）。
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公开(公告)号：US20100103983A1
公开(公告)日：2010-04-29
申请号：US12260641
申请日：2008-10-29
申请人： Yi-Pin Wang , Gregory E. Bottomley
发明人： Yi-Pin Wang , Gregory E. Bottomley
IPC分类号： H04B1/707
CPC分类号： H04J13/20 , H04B1/7105
摘要： A base station is described herein that uses a root spreading code based code assignment to transmit signals to a mobile station. The mobile station can then suppress intra-block interference by effectively using a joint detection technique or a non-linear equalization technique to detect the transmitted symbols.
摘要翻译： 本文描述了使用基于根扩展码的代码分配来向移动台发送信号的基站。 移动台然后可以通过有效地使用联合检测技术或非线性均衡技术来检测所发送的符号来抑制块内干扰。
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69.发明申请Method and Apparatus for Efficient Estimation of Interference in a Wireless Receiver 有权无线接收机干扰有效估计的方法和装置公开(公告)号：US20090304132A1
公开(公告)日：2009-12-10
申请号：US12133636
申请日：2008-06-05
申请人： Douglas A. Cairns , Gregory E. Bottomley , Andreas Cedergren , Tracy L. Fulghum , Elias Jonsson
发明人： Douglas A. Cairns , Gregory E. Bottomley , Andreas Cedergren , Tracy L. Fulghum , Elias Jonsson
IPC分类号： H04B7/10
CPC分类号： H04B1/7117 , H04B1/712
摘要： Methods and apparatus for determining an impairment covariance matrix for use in an interference-suppressing CDMA receiver are disclosed. In several of the disclosed embodiments, precise information regarding signal propagation delays is not needed. An exemplary method includes the selection of a plurality of processing delays for processing a received CDMA signal. Net channel coefficients for the processing delays are estimated and used to calculate an impairment covariance matrix. The impairment covariance matrix is calculated as a function of the estimated net channel coefficients and the processing delays, without estimating a propagation medium channel response for the received signal.
摘要翻译： 公开了用于确定用于干扰抑制CDMA接收机的损害协方差矩阵的方法和装置。 在所公开的几个实施例中，不需要关于信号传播延迟的精确信息。 一种示例性方法包括选择用于处理所接收的CDMA信号的多个处理延迟。 用于处理延迟的净通道系数被估计并用于计算损害协方差矩阵。 损伤协方差矩阵作为估计的净通道系数和处理延迟的函数计算，而不估计接收信号的传播介质通道响应。
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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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