公开(公告)号：US08265130B2

公开(公告)日：2012-09-11

申请号：US12512203

申请日：2009-07-30

申请人： Philip J. Pietraski ,  Mihaela C. Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

发明人： Philip J. Pietraski ,  Mihaela C. Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

IPC分类号： H03H7/40 ,  H03K5/159

CPC分类号： H04L25/03038 ,  H04B1/7097 ,  H04L27/0014 ,  H04L2025/03509 ,  H04L2025/03547 ,  H04L2025/03585 ,  H04L2025/03611 ,  H04L2025/03617 ,  H04L2025/03687 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0065

摘要： An adaptive equalizer including an equalizer filter and a tap coefficients generator used to process a sample data stream derived from a plurality of received signals is disclosed. The tap coefficients generator includes an equalizer tap update unit, a vector norm square estimator, an active taps mask generator, a switch and a pilot amplitude reference unit used to minimize the dynamic range of the equalizer filter. A dynamic mask vector is used to mask active taps generated by the equalizer tap update unit when an unmasked signal output by the equalizer filter is selected by the switch to generate an error signal fed to the equalizer tap update unit. A fixed mask vector is used to mask active taps generated by the equalizer tap update unit when a masked signal output by the equalizer filter is used to generate the error signal.

摘要翻译： 公开了一种包括均衡器滤波器和用于处理从多个接收信号导出的采样数据流的抽头系数发生器的自适应均衡器。 抽头系数发生器包括均衡器抽头更新单元，矢量范数平方估计器，有源抽头掩码发生器，用于最小化均衡器滤波器的动态范围的开关和导频振幅参考单元。 当由开关选择由均衡器滤波器输出的未屏蔽信号以产生馈送到均衡器抽头更新单元的误差信号时，动态屏蔽矢量用于屏蔽均衡器抽头更新单元产生的有效抽头。 当使用由均衡器滤波器输出的屏蔽信号来产生误差信号时，固定屏蔽矢量用于屏蔽均衡器抽头更新单元产生的有源抽头。

公开(公告)号：US08107519B2

公开(公告)日：2012-01-31

申请号：US12562384

申请日：2009-09-18

申请人： Hidetoshi Kawauchi ,  Naoki Yoshimochi ,  Ryoji Ikegaya

发明人： Hidetoshi Kawauchi ,  Naoki Yoshimochi ,  Ryoji Ikegaya

IPC分类号： H03H7/30 ,  H04B1/10

CPC分类号： H04L25/03057 ,  H04L2025/03414 ,  H04L2025/0349 ,  H04L2025/03547

摘要： An equalizer includes: a replica generation means for generating a replica of a multipath component by applying an adaptive filter to a received signal; a removal means for generating a multipath-component removed signal from which the multipath component has been removed by subtracting the replica from the received signal; a correlation value calculation means for calculating a correlation value between the received signal and the replica; a power value calculation means for calculating a power value of the replica; a determination means for determining whether the replica is the replica of the multipath component based on the correlation value and the power value; and a selection means for outputting the multipath-component removed signal when it is determined that the replica is the replica of the multipath component, and outputting the received signal when it is determined that the replica is not the replica of the multipath component.

摘要翻译： 均衡器包括：复制产生装置，用于通过对接收到的信号应用自适应滤波器来产生多径分量的副本; 去除装置，用于生成多径分量去除信号，通过从接收信号中减去复制品，从该多路径分量去除信号已经去除了多路径分量; 相关值计算装置，用于计算接收信号和副本之间的相关值; 用于计算复制品的功率值的功率值计算装置; 确定装置，用于基于所述相关值和所述功率值来确定所述副本是否是所述多路径分量的副本; 以及选择装置，用于当确定副本是多路径分量的副本时输出多路径分量去除信号，并且当确定副本不是多路径分量的副本时，输出接收的信号。

公开(公告)号：US08059753B2

公开(公告)日：2011-11-15

申请号：US11798762

申请日：2007-05-16

申请人： Yu-Tao Hsieh ,  Chao-Kai Wen ,  Jia-Hao Wu ,  Pang-An Ting

发明人： Yu-Tao Hsieh ,  Chao-Kai Wen ,  Jia-Hao Wu ,  Pang-An Ting

IPC分类号： H03K9/00 ,  H04L27/00 ,  H04L27/28

CPC分类号： H04L25/022 ,  H04L25/0222 ,  H04L25/0228 ,  H04L25/0232 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03547

摘要： An adaptive channel estimator for estimating channel frequency responses when receiving OFDM symbols. The adaptive channel estimator comprises a channel estimator and a channel tracking module. The channel estimator generates one first channel frequency response for each OFDM symbol when operated in the first mode, and generates the channel frequency responses of a second channel frequency response for every N-th OFDM symbols when operated in the second mode, wherein N is a constant integer exceeding one and j is a non-negative integer. The channel tracking module indicates a channel status, and controls the channel estimator to operate in a first mode or a second mode according to the channel status.

摘要翻译： 一种自适应信道估计器，用于在接收OFDM符号时估计信道频率响应。 自适应信道估计器包括信道估计器和信道跟踪模块。 当在第一模式下操作时，信道估计器为每个OFDM符号生成一个第一信道频率响应，并且在第二模式下操作时，为每个第N个OFDM符号产生第二信道频率响应的信道频率响应，其中N是 超过1的常数整数，j是非负整数。 信道跟踪模块指示信道状态，并且根据信道状态控制信道估计器在第一模式或第二模式中操作。

公开(公告)号：US07545883B2

公开(公告)日：2009-06-09

申请号：US11872527

申请日：2007-10-15

申请人： Kamilo Feher

发明人： Kamilo Feher

IPC分类号： H04L27/00

CPC分类号： H04L7/0008 ,  H04B1/69 ,  H04B1/707 ,  H04B7/0871 ,  H04B2201/70703 ,  H04L1/0056 ,  H04L25/03019 ,  H04L25/03828 ,  H04L25/4902 ,  H04L27/00 ,  H04L27/0004 ,  H04L27/0008 ,  H04L27/18 ,  H04L27/2017 ,  H04L27/2053 ,  H04L27/2071 ,  H04L27/22 ,  H04L27/2626 ,  H04L27/2637 ,  H04L27/2647 ,  H04L27/34 ,  H04L27/3405 ,  H04L27/362 ,  H04L27/38 ,  H04L2025/03547 ,  H04L2025/03681 ,  H04L2027/0087 ,  Y02D70/122 ,  Y02D70/124 ,  Y02D70/40 ,  Y02D70/444

摘要： Diversity wireless system, processor, cross-correlator, transmit baseband filter and modulator for processing, cross-correlating, filtering, modulating and providing a first and a second bit rate signal to a transmission system for transmission of the processed, filtered, modulated signal. Transmission system having two transmitters for transmission of the modulated signal. Diversity receiver system with two receivers for receiving the transmitted modulated signal and for providing received signal to a demodulator. Demodulator, receive baseband filter and receive processor for demodulation, filtering and processing received signal. Receive baseband filter for filtering is mis-matched to the transmit baseband filter for filtering of the first bit rate signal and receive processor for processing first bit rate demodulated baseband filtered signal provides received baseband mis-match filtered cross-correlated in-phase and quadrature-phase signal. Processor and transmit baseband filter for processing and filtering a signal into a cross-correlated filtered and into a cross-correlated spread spectrum in-phase and quadrature-phase baseband signal. Processor, first and second modulator for processing and baseband filtering a signal into time division multiplexed (TDM) filtered signal and into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered and processed OFDM signal to two modulators for modulation, transmission and diversity reception.

摘要翻译： 分集无线系统，处理器，互相关器，发射基带滤波器和调制器，用于处理，互相关，滤波，调制并向传输系统提供第一和第二比特率信号，以便传输经处理的，经滤波的调制信号。 具有用于传输调制信号的两个发射机的传输系统。 具有两个接收机的分集接收机系统，用于接收发送的调制信号并将其提供给解调器。 解调器，接收基带滤波器和接收处理器进行解调，滤波和处理接收信号。 用于滤波的接收基带滤波器与用于滤波第一比特率信号的发射基带滤波器不匹配，并且用于处理的接收处理器用于处理第一比特率解调的基带滤波信号，提供接收的基带误匹配滤波的交叉相位同相和正交滤波器， 相位信号。 处理器和发射基带滤波器，用于处理和滤波信号到互相关滤波和交叉相位扩频同相和正交相位基带信号。 处理器，第一和第二调制器，用于处理和基带滤波信号到时分多路复用（TDM）滤波信号并且转换成正交频分复用（OFDM）信号，并且用于将经处理的TDM滤波和处理的OFDM信号提供给两个调制器用于调制，传输和 多样化接收。

公开(公告)号：US20080031316A1

公开(公告)日：2008-02-07

申请号：US11579848

申请日：2005-02-02

申请人： Belotserkovsky Maxim ,  Dong-Chang Shiue

发明人： Belotserkovsky Maxim ,  Dong-Chang Shiue

IPC分类号： H04L27/01

CPC分类号： H04L27/0014 ,  H04L2025/03547 ,  H04L2025/03726 ,  H04L2025/03732 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0073 ,  H04L2027/0079 ,  H04N5/211 ,  Y02E50/17

摘要： A carrier recovery and equalization architecture for use with a digital communication system receiver can include a carrier tracking loop having an equalizer. The equalizer can be selectively positionable to a location that is external to the carrier tracking loop (FIG. 3) and to a location within the carrier tracking loop (FIG. 2). The equalizer can be positioned according to a measure of convergence for the carrier tracking loop

摘要翻译： 与数字通信系统接收机一起使用的载波恢复和均衡架构可以包括具有均衡器的载波跟踪环路。 均衡器可以选择性地定位到载波跟踪环（图3）外部的位置和载波跟踪环（图2）内的位置。 可以根据载波跟踪环路的收敛度量来定位均衡器

公开(公告)号：US20060171451A1

公开(公告)日：2006-08-03

申请号：US11265373

申请日：2005-11-02

申请人： Philip Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory Sternberg ,  Rui Yang ,  Bin Li

发明人： Philip Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory Sternberg ,  Rui Yang ,  Bin Li

IPC分类号： H03K5/159

CPC分类号： H04L25/03038 ,  H04B1/7097 ,  H04L27/0014 ,  H04L2025/03509 ,  H04L2025/03547 ,  H04L2025/03585 ,  H04L2025/03611 ,  H04L2025/03617 ,  H04L2025/03687 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0065

摘要： An adaptive equalizer including an equalizer filter and a tap coefficients generator used to process a sample data stream derived from a plurality of received signals is disclosed. The tap coefficients generator includes an equalizer tap update unit, a vector norm square estimator, an active taps mask generator, a switch and a pilot amplitude reference unit used to minimize the dynamic range of the equalizer filter. A dynamic mask vector is used to mask active taps generated by the equalizer tap update unit when an unmasked signal output by the equalizer filter is selected by the switch to generate an error signal fed to the equalizer tap update unit. A fixed mask vector is used to mask active taps generated by the equalizer tap update unit when a masked signal output by the equalizer filter is used to generate the error signal.

公开(公告)号：US07010030B2

公开(公告)日：2006-03-07

申请号：US09910971

申请日：2001-07-20

申请人： Krishnamurthy Vaidyanathan

发明人： Krishnamurthy Vaidyanathan

IPC分类号： H03H7/30

CPC分类号： H04L25/03057 ,  H04L2025/03547 ,  H04L2025/03605 ,  H04L2025/037

摘要： A block decision feedback equalizer is designed by deriving, from first principles, a block exact decision feedback equalizer and then systematically applying simplifying assumptions to obtain several block approximate decision feedback equalizers, each suitable for multipath channel equalization and having error convergence insensitive to filter length. The resulting block decision feedback equalizer is software definable may be dynamically adapted by choosing whether to update error correction coefficients.

公开(公告)号：US20060018410A1

公开(公告)日：2006-01-26

申请号：US10899615

申请日：2004-07-26

申请人： Eko Onggosanusi ,  Anand Dabak ,  Srinath Hosur

发明人： Eko Onggosanusi ,  Anand Dabak ,  Srinath Hosur

IPC分类号： H03D1/00

CPC分类号： H04L25/0204 ,  H04B7/0434 ,  H04B7/0854 ,  H04L2025/03547

摘要： In a wireless MIMO system, a multimode detector selects detection mode by channel estimation: ill-conditioned channels trigger use of high performance detection, whereas well-behaved channels lead to low complexity detection. Detection modes typically include maximum likelihood, minimum mean squared error, zero forcing, and so forth.

摘要翻译： 在无线MIMO系统中，多模式检测器通过信道估计选择检测模式：不良条件的信道触发使用高性能检测，而良好的信道导致检测低复杂度。 检测模式通常包括最大似然，最小均方误差，零强迫等。

公开(公告)号：US20050164644A1

公开(公告)日：2005-07-28

申请号：US10507076

申请日：2003-07-14

申请人： Kenichiro Shinoi ,  Hiroaki Sudo

发明人： Kenichiro Shinoi ,  Hiroaki Sudo

IPC分类号： H04B1/707 ,  H04B1/711 ,  H04B7/26 ,  H04L25/03 ,  H04L27/00 ,  H04W28/18 ,  H04W88/02 ,  H04B1/00

CPC分类号： H04B1/7097 ,  H04B1/7105 ,  H04B1/7115 ,  H04L27/0008 ,  H04L2025/03547

摘要： A wireless communication apparatus and a receiving scheme selection method are provided for improved overall system throughput. SIR measurer (106) measures the SIR of a known signal. Doppler frequency detector (108) detects the Doppler frequency from the received signal and measures the Doppler shift amount. The Doppler shift amount serves as an indicator of the moving speed of the mobile station apparatus. Interference power measurer (110) measures interference power from other cells. Known signal obtainer (104), SIR measurer (106), Doppler frequency detector (108), and interference power measurer (110) constitute a propagation environment estimator in this embodiment. Based on the SIR, Doppler shift amount, and interference power, receiving scheme selector (112) selects a receiving scheme of either RAKE reception or linear equalization.

摘要翻译： 提供无线通信装置和接收方案选择方法以改善整体系统吞吐量。 SIR测量器（106）测量已知信号的SIR。 多普勒频率检测器（108）从接收到的信号中检测多普勒频率，并测量多普勒频移量。 多普勒频移量用作移动站装置的移动速度的指标。 干扰功率测量器（110）测量来自其他小区的干扰功率。 已知信号获取器（104），SIR测量器（106），多普勒频率检测器（108）和干扰功率测量器（110）构成了本实施例中的传播环境估计器。 接收方案选择器（112）基于SIR，多普勒频移量和干扰功率，选择RAKE接收或线性均衡的接收方案。

公开(公告)号：US06353631B1

公开(公告)日：2002-03-05

申请号：US09241089

申请日：1999-02-01

申请人： Hideki Matsuura

发明人： Hideki Matsuura

IPC分类号： H03H730

CPC分类号： H04L25/03038 ,  H04L2025/0342 ,  H04L2025/03547

摘要： In a quadrature amplitude modulation signal demodulation circuit including first and second delay circuits for receiving an I-axis component and an Q-axis component of a baseband signal, a tap coefficient calculating circuit for calculating first tap coefficients in accordance with the delayed I-axis component and second tap coefficients in accordance with the delayed Q-axis component, an interference detection circuit for detecting a center of an interference signal included in the baseband signal, a control circuit for controlling delay time periods of the first and second delay circuits in accordance with an output signal of the interference detection circuit, first and second equalizers for equalizers the I-axis component and the Q-axis component in accordance with the first and second tap coefficients, and an adder for adding the output signals the first and second transversal equalizers, the interference detection circuit is constructed by a plurality of absolute value adders, each for adding an absolute value of one of the first tap coefficients and one of the second tap coefficients having the same timing, and a comparator for comparing output values of the absolute value adders with each other.

摘要翻译： 在包括用于接收I轴分量的第一和第二延迟电路和基带信号的Q轴分量的正交幅度调制信号解调电路中，抽头系数计算电路用于根据延迟的I轴计算第一抽头系数 根据延迟的Q轴分量的分量和第二抽头系数，用于检测包括在基带信号中的干扰信号的中心的干扰检测电路，用于根据第一和第二延迟电路控制延迟时间的控制电路 具有干扰检测电路的输出信号，用于根据第一和第二抽头系数对I轴分量和Q轴分量进行均衡的第一和第二均衡器，以及用于将第一和第二横向的输出信号相加的加法器 均衡器，干扰检测电路由多个绝对值加法器构成，即ea ch，用于添加第一抽头系数中的一个的绝对值和具有相同定时的第二抽头系数之一;以及比较器，用于将绝对值加法器的输出值彼此进行比较。