公开(公告)号：US20020097787A1

公开(公告)日：2002-07-25

申请号：US10113186

申请日：2002-04-01

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  David K. Mesecher ,  Alexander M. Jacques

IPC: H04K001/00

CPC classification number: H04B1/7085 ,  H04B1/30 ,  H04B1/707 ,  H04B1/70755 ,  H04B1/7093 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L27/0014 ,  H04L2027/0067

Abstract: The present invention is a user equipment (UE), including a receiver and method for receiving one of a plurality of channels in a communication signal. An adaptive matched filter produces a filtered signal by using a weighting signal. A rake receiver produces a filter weighting signal using a pseudo-noise signal generator. A channel despreader despreads the filtered signal using the pseudo-noise signal generated to produce a despread channel signal of the selected channel. A pilot channel despreader despreads the filtered signal using a pseudo-noise signal generator to produce a despread pilot signal of the pilot channel. A hard decision processor receives the despread channel signal of the selected channel and produces a correction signal. A phase-locked loop utilizes at least the despread pilot signal and produces a phase correction signal which is applied to produce phase-corrected channel signals.

公开(公告)号：US20040032842A1

公开(公告)日：2004-02-19

申请号：US10643792

申请日：2003-08-19

Applicant: InterDigital Technology Corporation

Inventor： David K. Mesecher ,  Rui Yang ,  Ramon Cerda

IPC: H04B007/216

CPC classification number: H04B1/7085 ,  H04B1/707 ,  H04B1/7117 ,  H04L27/0014 ,  H04L27/2332 ,  H04L2027/0053 ,  H04L2027/0055 ,  H04L2027/0069 ,  H04L2027/0081

Abstract: A receiver for receiving a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a mixing signal and for combining the mixing signal with said information signal to produce a correction signal. An analyzer analyzes the phase of said correction signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller which recursively adjusts the phase of the correction signal such that the phase of said correction signal is substantially equal to said reference phase. The bandwidth controller then selects a bandwidth within an adjustable range based on the correction signal, estimates an offset by interrogating the error signal, and modifies said correction signal by the offset.

Abstract translation: 用于接收无线发送的CDMA通信信号的接收机包括用于校正已发送的信息信号中的相位误差的系统。 校正系统包括用于产生混合信号并将混合信号与所述信息信号组合以产生校正信号的电路。 分析器分析所述校正信号的相位，并且基于分析的相位与参考相位的偏差产生误差信号。 带宽控制器，递归地调整校正信号的相位，使得所述校正信号的相位基本上等于所述参考相位。 然后，带宽控制器基于校正信号选择可调整范围内的带宽，通过询问误差信号来估计偏移量，并通过偏移来修改所述校正信号。

公开(公告)号：US20030179819A1

公开(公告)日：2003-09-25

申请号：US10417384

申请日：2003-04-16

Applicant: InterDigital Technology Corporation

Inventor： Gary R. Lomp ,  Leonid Kazakevich ,  Jeffrey S. Polan ,  David K. Mesecher

IPC: H04L005/16 ,  H04B001/38

CPC classification number: H04B7/0894 ,  H04J13/00 ,  H04W52/52

Abstract: A modem is configured for demodulating a communication signal associated with a unique code-division multiple access (CDMA) code. The modem includes an adaptive matched filter and a vector correlator. The vector correlator generates filter coefficients for the adaptive matched filter based on signal distortion determined by the vector correlator. The vector correlator has a processing capacity of at least eleven chips whereby the vector correlator compensates for a known phase distortion and for multipath distortion ascertainable within its processing capacity. The adaptive matched filter processes communication signals with the unique CDMA code using coefficients generated by the vector correlator.

Abstract translation: 调制解调器被配置用于解调与唯一码分多址（CDMA）码相关联的通信信号。 调制解调器包括自适应匹配滤波器和向量相关器。 矢量相关器基于由矢量相关器确定的信号失真产生自适应匹配滤波器的滤波器系数。 矢量相关器具有至少十一个芯片的处理能力，由此矢量相关器补偿已知的相位失真和在其处理能力内可确定的多径失真。 自适应匹配滤波器使用由矢量相关器产生的系数来处理具有唯一CDMA码的通信信号。

公开(公告)号：US20020136266A1

公开(公告)日：2002-09-26

申请号：US10074398

申请日：2002-02-12

Applicant: InterDigital Technology Corporation

Inventor： David K. Mesecher

IPC: H04B001/69

CPC classification number: H04W64/00 ,  G01S5/0215 ,  G01S5/12

Abstract: A base station transmits a first spread spectrum signal having a first code. It receives and analyzes an impulse response of multipath components of a second spread spectrum signal having a second code to determine a first received component. The second signal is time synchronized with the first spread spectrum signal. A distance determination is made based on in part a timing difference between the second code of the received second signal and the first code of the base station's transmitted first signal and the determined first received components for that base station's received second signal.

Abstract translation: 基站发送具有第一码的第一扩频信号。 它接收并分析具有第二码的第二扩频信号的多径分量的脉冲响应，以确定第一接收分量。 第二信号与第一扩频信号时间同步。 基于部分地基于接收到的第二信号的第二代码与基站发送的第一信号的第一代码和所确定的基站接收的第二信号的第一接收分量之间的定时差进行距离确定。

公开(公告)号：US20020094019A1

公开(公告)日：2002-07-18

申请号：US10068668

申请日：2002-02-06

Applicant: InterDigital Technology Corporation

Inventor： David K. Mesecher

IPC: H04K001/00

CPC classification number: H04B1/712 ,  H04B7/0613 ,  H04B7/0615 ,  H04B7/0619 ,  H04B7/0634 ,  H04B7/0678 ,  H04B7/0845 ,  H04B7/0854 ,  H04B7/0857 ,  H04B7/0891 ,  H04B2201/70701 ,  H04J13/0003

Abstract: A user equipment has a receiving antenna for receiving a reference signals and data signal versions. Each reference signal is received from a different antenna from a single transmission site and each data signal version is received from a different antenna from a single transmission site. The received reference signals are filtered using a code associated wit the reference signals. Each filtered reference signal is weighted by a particular weight. The weighted first signals are combined to produce a combined signal and each of the reference signal's particular weight is adaptively adjusted based on in part a signal quality of the combined signal. Each data signal version is filtered with a code associated with the data signal version. The filtered versions are combined to recover data.

Abstract translation: 用户设备具有用于接收参考信号和数据信号版本的接收天线。 每个参考信号从与单个传输站点不同的天线接收，并且每个数据信号版本从与单个传输站点不同的天线接收。 使用与参考信号相关联的代码对接收到的参考信号进行滤波。 每个滤波的参考信号由特定的权重加权。 加权的第一信号被组合以产生组合信号，并且部分地基于组合信号的信号质量自适应地调整参考信号的特定权重中的每一个。 每个数据信号版本都使用与数据信号版本相关联的代码进行过滤。 过滤的版本被组合以恢复数据。

公开(公告)号：US20020093932A1

公开(公告)日：2002-07-18

申请号：US10073545

申请日：2002-02-11

Applicant: InterDigital Technology Corporation

Inventor： Gary R. Lomp ,  Leonid Kazakevich ,  Jeffrey S. Polan ,  David K. Mesecher

IPC: H04B007/216

CPC classification number: H04B7/0894 ,  H04J13/00 ,  H04W52/52

Abstract: A CDMA subscriber unit includes an antenna system having multiple antennas and delay units for receiving a transmitted signal and outputting a combined signal having a known distortion imparted by the antenna system. The combined signal is in turn processed by a modem, which compensates for the known distortion in a manner which provides improved signal gain. The improved signal gain permits a reduction in transmit power and, accordingly, increased capacity of the base station. Where the antenna system is to be remotely located from related signal processing equipment, separate units for the RF receiver/transmitter and the other signal processing equipment are provided so that the RF receiver/transmitter may also be remotely located along with the antenna system.

公开(公告)号：US20020071420A1

公开(公告)日：2002-06-13

申请号：US10073797

申请日：2002-02-11

Applicant: InterDigital Technology Corporation

Inventor： Gary R. Lomp ,  Leonid Kazakevich ,  Jeffrey S. Polan ,  David K. Mesecher

IPC: H04B007/216

CPC classification number: H04B7/0894 ,  H04J13/00 ,  H04W52/52

Abstract: A CDMA base station includes an antenna system having multiple antennas and delay units for receiving a transmitted signal and outputting a combined signal having a known distortion imparted by the antenna system. The combined signal is in turn processed by a modem, which compensates for the known distortion in a manner which provides improved signal gain. The improved signal gain permits a reduction in transmit power and, accordingly, increased capacity of the base station. Where the antenna system is to be remotely located from related signal processing equipment, separate units for the RF receiver/transmitter and the other signal processing equipment are provided so that the RF receiver/transmitter may also be remotely located along with the antenna system.

公开(公告)号：US20020067760A1

公开(公告)日：2002-06-06

申请号：US10043850

申请日：2002-01-11

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  David K. Mesecher ,  Alexander M. Jacques

IPC: H04K001/00

CPC classification number: H04B1/7085 ,  H04B1/30 ,  H04B1/707 ,  H04B1/70755 ,  H04B1/7093 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L27/0014 ,  H04L2027/0067

Abstract: The present invention is a user equipment for carrier offset recovery during reception of a communication signal over an air interface using a plurality of channels in a pilot signal. The user equipment comprises an adaptive match filter for producing a filtered signal using a weighting signal, a rake receiver for producing a filter weighting signal, and a means for defining the filter weighting signal with a correction signal. A channel despreader is also included in the user equipment for despreading the filtered signal using a pseudo-noise signal for a selected channel to produce a despread channel signal of the selected channel. A pilot channel despreader is coupled to the adaptive match filter output for despreading the filter signal using a pseudo-noise signal generated for the pilot channel, producing a despread pilot signal of the pilot channel. A hard decision processor, associated with a complex conjugate processor, is also included in the user equipment for producing the correction signal. A phase lock loop, which uses the despread pilot signal, produces a phase correction signal, which is applied to produce phase corrected channel signals.

Abstract translation: 本发明是一种在导频信号中使用多个信道通过空中接口在通信信号接收期间进行载波偏移恢复的用户设备。 用户设备包括用于使用加权信号产生滤波信号的自适应匹配滤波器，用于产生滤波器加权信号的瑞克接收机以及用校正信号定义滤波器加权信号的装置。 在用户设备中还包括一个信道去扩频器，用于使用所选信道的伪噪声信号对已滤波的信号进行解扩，以产生所选信道的解扩信道信号。 导频信道解扩器耦合到自适应匹配滤波器输出端，用于使用为导频信道生成的伪噪声信号对滤波器信号进行解扩，产生导频信道的解扩导频信号。 与复合共轭处理器相关联的硬决策处理器也包括在用于产生校正信号的用户设备中。 使用解扩导频信号的锁相环产生相位校正信号，其被施加以产生相位校正的信道信号。

公开(公告)号：US20020039382A1

公开(公告)日：2002-04-04

申请号：US10008411

申请日：2001-11-13

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  David K. Mesecher ,  Alexander M. Jacques

IPC: H04K001/00

CPC classification number: H04B1/7085 ,  H04B1/30 ,  H04B1/707 ,  H04B1/70755 ,  H04B1/7093 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L27/0014 ,  H04L2027/0067

Abstract: A digital spread spectrum communication system employing pilot-aided coherent multipath demodulation effects a substantial reduction in global-pilot and assigned-pilot overheads. The system and method uses a QPSK-modulated data signal whereby the modulated data is removed and the recovered carrier is used for channel amplitude and phase estimation. The resulting signal has no data modulation and is used as a pseudo-pilot signal. In conjunction with the pseudo-pilot signal, a multiple-input phase-locked loop is employed further eliminating errors due to carrier-offset by using a plurality of pseudo-pilot signals. A pilot signal is required to resolve absolute phase ambiguity, but at a greatly reduced magnitude.

公开(公告)号：US20010038666A1

公开(公告)日：2001-11-08

申请号：US09892369

申请日：2001-06-27

Applicant: InterDigital Technology Corporation, a Delaware Corporation

Inventor： David K. Mesecher ,  Alexander Reznik ,  Donald Grieco ,  Gary Cheung

IPC: H04K001/00

CPC classification number: H04B1/7103 ,  H04B1/7097 ,  H04B1/712 ,  H04B7/0613 ,  H04B7/0615 ,  H04B7/0619 ,  H04B7/0634 ,  H04B7/0678 ,  H04B7/0845 ,  H04B7/0854 ,  H04B7/0857 ,  H04B7/0891 ,  H04B2201/70701 ,  H04J13/0003

Abstract: A code division multiple access communication system transmits a pilot and traffic signal over a shared spectrum. The pilot and traffic signal have an associated code. Signals are received over the shared spectrum. The received signals are sampled. The samples are delayed to produce a window. The window has evenly time spaced samples. Each window sample is despread with a pilot code. A weight for each despread pilot code window sample is determined using an adaptive algorithm. Each window sample is despread with a traffic code. Each despread traffic code window sample is weighted with a corresponding weight of the determined weights. The despread traffic code window sample are combined as data of the traffic signal.

Abstract translation: 码分多址通信系统通过共享频谱发送导频和业务信号。 飞行员和交通信号灯具有相关的代码。 通过共享频谱接收信号。 接收到的信号被采样。 样品被延迟产生窗口。 窗口具有均匀的时间间隔样本。 每个窗口样本用导频代码解扩。 使用自适应算法确定每个解扩导频码窗口采样的权重。 每个窗口样本都使用流量代码进行解扩。 每个去扩展的交通码窗口样本用确定的权重的相应权重进行加权。 解扩的业务码窗口样本被合并为业务信号的数据。