公开(公告)号：US07796714B2

公开(公告)日：2010-09-14

申请号：US11461862

申请日：2006-08-02

申请人： Rita R. Rabbath ,  Terry E. Flach ,  James S. Tsusaki ,  Timothy J. Hughes ,  Kurt I. Winckler

发明人： Rita R. Rabbath ,  Terry E. Flach ,  James S. Tsusaki ,  Timothy J. Hughes ,  Kurt I. Winckler

IPC分类号： H04L27/08 ,  H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04

CPC分类号： H04B1/28 ,  H04B1/0003

摘要： In one aspect, the invention is a multichannel receiver. The multichannel receiver includes a first channel circuit of N channel circuits. The first channel circuit includes a band pass (BP) filter and a gain control (GC) feedback circuit configured to adjust a signal provided by the BP filter with respect to a reference voltage.

摘要翻译： 一方面，本发明是多通道接收机。 多通道接收机包括N个通道电路的第一通道电路。 第一通道电路包括带通（BP）滤波器和增益控制（GC）反馈电路，其被配置为相对于参考电压调整由BP滤波器提供的信号。

公开(公告)号：US07751511B2

公开(公告)日：2010-07-06

申请号：US11550901

申请日：2006-10-19

申请人： Andres Reial ,  Karin Engdahl ,  Bo Göransson

发明人： Andres Reial ,  Karin Engdahl ,  Bo Göransson

IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC分类号： H04B1/712 ,  H04B2201/709727 ,  H04L25/03343 ,  H04L2025/03426

摘要： A subset of modeled impairment correlation terms are selected for use in received signal processing. According to one embodiment, a subset of modeled impairment correlation terms is selected and a composite impairment correlation term is determined based on the subset of modeled impairment correlation terms. The composite impairment correlation term may be determined by scaling the modeled impairment correlation terms included in the subset by respective model fitting parameters. The scaled modeled impairment correlation terms are then combined to form the composite impairment correlation term. The subset of modeled impairment correlation terms may be selected based on their respective model fitting parameters. In one embodiment, the modeled impairment terms having a model fitting parameter that satisfy a threshold are included in the subset while those that do not are excluded. The composite impairment correlation term may be used for received signal processing, e.g., demodulation or signal-to-interference estimation.

摘要翻译： 选择模型损害相关项的子集用于接收信号处理。 根据一个实施例，选择模型化损害相关项的子集，并且基于建模的损害相关项的子集来确定复合损害相关项。 复合损害相关项可以通过用相应的模型拟合参数缩放包括在子集中的建模损伤相关项来确定。 然后将缩放的建模的损伤相关项组合以形成复合损害相关项。 可以基于它们各自的模型拟合参数来选择建模的损伤相关项的子集。 在一个实施例中，具有满足阈值的模型拟合参数的建模的损伤项包括在子集中，而不被排除。 复合损害相关项可以用于接收信号处理，例如解调或信号对干扰估计。

公开(公告)号：US07643588B2

公开(公告)日：2010-01-05

申请号：US11287112

申请日：2005-11-23

申请人： Giuseppe Visalli ,  Giuseppe Avellone

发明人： Giuseppe Visalli ,  Giuseppe Avellone

IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L25/08

CPC分类号： H04L25/0224 ,  H04L25/061 ,  H04L27/32 ,  H04L27/3818

摘要： The method is for estimating the fading coefficients of a plurality of transmission channels on which signals to be sent, generated as a function of a sequence of symbols, are transmitted according to a particular modulation, e.g. AM-PSK modulation. The fading coefficients are estimated by using estimations of the transmitted symbols obtained in advance, thus obtaining DC components of the received signal by coherent demodulation locked to the phases of the transmitted AM-PSK signals, and processing these DC components. The method may not require the choice of a stochastic distribution model of the channel fading, thus it remains efficient even when the channel characteristics vary significantly. Moreover, the method works correctly even if the received stream is disturbed by inter-symbolic interference (ISI) and/or by multi-path fading.

摘要翻译： 该方法是用于估计多个传输信道的衰落系数，其上根据特定调制发送作为符号序列生成的要发送的信号，例如， AM-PSK调制。 通过使用预先获得的发送符号的估计来估计衰落系数，从而通过锁定到发送的AM-PSK信号的相位的相干解调获得接收信号的DC分量，并处理这些DC分量。 该方法可能不需要选择信道衰落的随机分布模型，因此即使当信道特性显着变化时，仍然保持有效。 此外，即使接收的流被符号间干扰（ISI）和/或多路径衰落干扰，该方法也能正常工作。

公开(公告)号：US07561644B2

公开(公告)日：2009-07-14

申请号：US11237832

申请日：2005-09-29

申请人： Eyal Krupka

发明人： Eyal Krupka

IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC分类号： H04B1/10

摘要： A device, system and method for applying a whitening transformation to a plurality of samples of a sampled symbol to reduce both temporal correlation between the sampled symbol and a pre-determined number of previous symbols, and a spatial correlation between a plurality of samples.

摘要翻译： 一种用于将白化变换应用于采样符号的多个样本的装置，系统和方法，以减少采样符号与预先确定数量的先前符号之间的时间相关性，以及多个采样之间的空间相关性。

公开(公告)号：US07508892B2

公开(公告)日：2009-03-24

申请号：US11050175

申请日：2005-02-04

申请人： Masaya Kibune ,  Hirotaka Tamura

发明人： Masaya Kibune ,  Hirotaka Tamura

IPC分类号： H03D1/06

CPC分类号： H04L25/0328 ,  H04L25/03038

摘要： A receiver circuit has an equalizer that equalizes a received signal propagating through a transmission medium; a data detection circuit that detects an analog output signal of the equalizer at a data sample timing and outputs a digital signal; an intersymbol interference detection circuit that detects an intersymbol interference level from the analog output signal of the equalizer at the data sample timing and from the digital signal of the data detection circuit; and an equalization characteristic control unit that controls the characteristic of the equalizer to minimize the detected intersymbol interference level. The receiver circuit further has a data sample timing control unit in which the data sample timing is controlled to a sample timing at which the difference between the amplitude of the analog output waveform of the equalizer with respect to an impulse and the amplitude of an ideal impulse response waveform is minimal.

摘要翻译： 接收机电路具有均衡器，其均衡通过传输介质传播的接收信号; 数据检测电路，在数据采样定时检测均衡器的模拟输出信号，并输出数字信号; 符号间干扰检测电路，在数据采样定时和数据检测电路的数字信号中，从均衡器的模拟输出信号中检测出符号间干扰电平; 以及均衡特性控制单元，其控制均衡器的特性以使检测到的符号间干扰电平最小化。 接收器电路还具有数据采样定时控制单元，其中数据采样定时被控制到采样定时，在该采样定时处，均衡器的模拟输出波形的相对于脉冲的幅度与理想脉冲的振幅之差 响应波形最小。

公开(公告)号：US07508862B2

公开(公告)日：2009-03-24

申请号：US10957408

申请日：2004-10-01

申请人： Attila Bilgic ,  Mauro Bottero ,  Jean-Xavier Canonici ,  Manfred Zimmermann

发明人： Attila Bilgic ,  Mauro Bottero ,  Jean-Xavier Canonici ,  Manfred Zimmermann

IPC分类号： H03K9/00 ,  H04B7/10 ,  H03D1/06

CPC分类号： H04B1/7117 ,  H04B1/7113

摘要： Correlations between the received signal to which pilot symbols have been applied at the transmitter end, and a correlation signal which contains the pilot symbols are carried out in the receiver in order to determine a path delay profile. Averaging processes are carried out over two or more delay profiles obtained in this way. Evaluations are carried out in one or more threshold value selection units (22.1, 22.2) on two or more averaged delay profiles with the aim of path selection. The parameters which govern the correlations and/or the averaging processes and/or the evaluations, and/or the repetition interval of these calculations are set as a function of the relative speed between the transmitter and the receiver, the frequency error between the carrier frequency of the received signal and the reference frequency that is set at the receiving end, and the noise level of the received signal. In the case of reception from two or more base stations, a final path selection is made in a finger allocation unit (40).

摘要翻译： 在接收机中执行在发送端发送导频符号的接收信号与包含导频符号的相关信号之间的相关性，以确定路径延迟分布。 通过以这种方式获得的两个或更多个延迟分布进行平均处理。 为了路径选择的目的，在两个或多个平均延迟分布上的一个或多个阈值选择单元（22.1,22.2）中执行评估。 控制相关性和/或平均处理和/或评估的参数和/或这些计算的重复间隔被设置为发射机和接收机之间的相对速度的函数，载波频率之间的频率误差 的接收信号和在接收端设置的参考频率，以及接收信号的噪声电平。 在从两个或多个基站接收的情况下，在手指分配单元（40）中进行最终路径选择。

公开(公告)号：US07457379B2

公开(公告)日：2008-11-25

申请号：US10862715

申请日：2004-06-07

申请人： Baoguo Yang ,  Nelson R. Sollenberger

发明人： Baoguo Yang ,  Nelson R. Sollenberger

IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC分类号： H04L27/22 ,  H04L25/062 ,  H04L27/18

摘要： A method to perform DC compensation on a Radio Frequency (RF) burst transmitted between a servicing base station and a wireless terminal in a cellular wireless communication system that first receives the RF burst modulated according to either a first or second modulation format. Samples from the RF burst, taken from the training sequence, are produced and averaged to produce a DC offset estimate. The DC offset estimate is then subtracted from each of the samples. The modulation format of RF burst may then be identified from the samples. Depending on the identified modulation format, the DC offset estimate may be re-added to the samples when a particular modulation format is identified as the modulation format of the RF burst. This decision is made based on how well various components within the wireless terminal perform DC offset compensation.

摘要翻译： 在首先接收根据第一或第二调制格式调制的RF突发的蜂窝无线通信系统中在服务基站和无线终端之间传送的射频（RF）突发上执行DC补偿的方法。 从训练序列获取来自RF突发的样本，并进行平均以产生DC偏移估计。 然后从每个样本中减去DC偏移估计。 然后可以从样本中识别RF突发的调制格式。 取决于所识别的调制格式，当将特定调制格式识别为RF突发的调制格式时，DC偏移估计可被重新添加到样本。 该决定基于无线终端内的各种组件执行DC偏移补偿的程度。

公开(公告)号：US07421045B2

公开(公告)日：2008-09-02

申请号：US11302819

申请日：2005-12-14

申请人： Philip J. Pietraski

发明人： Philip J. Pietraski

IPC分类号： H03D1/06 ,  H03K5/01 ,  H04B1/10 ,  H04L25/08

CPC分类号： H04L1/206 ,  H04B17/336

摘要： A method and apparatus for correcting symbols of a common pilot channel (CPICH) to generate an accurate signal-to-interference ratio (SIR) estimate in a wireless communication system are disclosed. In one embodiment, a non-stationary mean of a group of the CPICH symbols is estimated, the CPICH symbols are delayed, and the CPICH symbols are corrected by dividing the delayed CPICH symbols by the estimated non-stationary mean of the group of CPICH symbols. In another embodiment, a signal power estimate is generated based on the magnitude of CPICH symbols, a noise power estimate is generated by subtracting the signal power estimate from a total power estimate based on the magnitude of the CPICH symbols, and a SIR estimate is generated for symbols that have undergone a time varying gain by dividing the signal power estimate by the noise power estimate.

摘要翻译： 公开了一种用于校正公共导频信道（CPICH）的符号以在无线通信系统中生成准确的信号干扰比（SIR）估计的方法和装置。 在一个实施例中，估计一组CPICH符号的非平稳平均值，CPICH符号被延迟，并且通过将延迟的CPICH符号除以CPICH符号组的估计非平均平均值来校正CPICH符号 。 在另一个实施例中，基于CPICH符号的幅度产生信号功率估计，通过基于CPICH符号的幅度从总功率估计中减去信号功率估计来产生噪声功率估计，并且产生SIR估计 对于通过将信号功率估计除以噪声功率估计而经历了时变增益的符号。

公开(公告)号：US07388937B1

公开(公告)日：2008-06-17

申请号：US10923988

申请日：2004-08-23

申请人： Kevin L. Rodger ,  Kenneth W. Ferguson ,  Kevin Chun Yeung Hung ,  Jeremy Paul James Benson ,  Andrew S. Wright

发明人： Kevin L. Rodger ,  Kenneth W. Ferguson ,  Kevin Chun Yeung Hung ,  Jeremy Paul James Benson ,  Andrew S. Wright

IPC分类号： H03D1/06

CPC分类号： H04L1/205

摘要： Systems and methods for analyzing the jitter content of an oversampled digital communication signal are disclosed. Advantageously, the communication signal can correspond to an arbitrary data sequence, rather than only to a repeating test sequence. For example, the systems and methods can be embodied in test equipment and in simulation equipment as design tools and/or validation tools. The systems and methods disclosed advantageously facilitate the decomposition and quantification of the main jitter components (random and deterministic), as well as its various subcomponents (periodic jitter, data-dependent jitter, inter-symbol interference, device-state-dependent jitter, other bounded uncorrelated jitter, and data-dependent-random jitter).

摘要翻译： 公开了用于分析过采样数字通信信号的抖动内容的系统和方法。 有利地，通信信号可以对应于任意的数据序列，而不仅仅是重复的测试序列。 例如，系统和方法可以体现在测试设备和仿真设备中，作为设计工具和/或验证工具。 所公开的系统和方法有利于促进主要抖动分量（随机和确定性）的分解和量化，以及其各种子部件（周期性抖动，数据相关抖动，符号间干扰，器件状态相关抖动，其他 有界不相关抖动和数据相关随机抖动）。

公开(公告)号：US07388936B2

公开(公告)日：2008-06-17

申请号：US10988142

申请日：2004-11-12

申请人： Marko Kocic ,  Lidwine Martinot ,  Zoran Zvonar

发明人： Marko Kocic ,  Lidwine Martinot ,  Zoran Zvonar

IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC分类号： H04L25/0216 ,  H04L25/061

摘要： A receiver unit includes a prefilter that receives as one of the inputs a channel impulse response (CIR) estimation data set and removes unnecessary data information from the CIR estimation data set and filters input signal so to form a first output data set. An equalizer core receives the first output data set and based on computed CIR length and SNR value of the first output data set so as to determine which portion of the first output data set are assigned to at least one of at least two low complexity equalization modules used for processing.

摘要翻译： 接收机单元包括预滤波器，其接收作为输入的输入之一的信道脉冲响应（CIR）估计数据集，并从CIR估计数据集中去除不需要的数据信息，并对输入信号进行滤波，从而形成第一输出数据组。 均衡器核心接收第一输出数据集并且基于计算的第一输出数据集的CIR长度和SNR值，以便确定第一输出数据集的哪一部分被分配给至少两个低复杂度均衡模块中的至少一个 用于加工。