公开(公告)号：WO2005002112A3

公开(公告)日：2005-12-01

申请号：PCT/US2004014615

申请日：2004-05-10

Applicant: INTERDIGITAL TECH CORP ,  DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  KEARNEY KENNETH P

Inventor： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  KEARNEY KENNETH P

IPC: H03F1/32 ,  H04B1/04 ,  H04B1/10 ,  H04B1/06 ,  H04B17/00

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H03F1/3294 ,  H03F1/34 ,  H03F3/24 ,  H03F2200/462 ,  H03F2200/465 ,  H03F2200/468 ,  H04B2001/0425 ,  H04B2001/0433

Abstract: In order to compensate for performance degradation caused by inferior low-cost analog radio component tolerances of an analog radio, a wireless communication transmitter employs a control process to implement numerous digital signal processing (DSP) techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. By monitoring a plurality of parameters associated with the analog radio, such as temperature, bias current or the like, enhanced phase and amplitude compensation, as well as many other radio frequency (RF) parameters may be implemented.

Abstract translation: 为了补偿由模拟无线电的低成本模拟无线电组件公差的劣化引起的性能下降，无线通信发射机采用控制过程来实现许多数字信号处理（DSP）技术来补偿这种模拟组件的缺陷，使得 现代规格可能放松。 通过监视与诸如温度，偏置电流等的模拟无线电相关联的多个参数，可以实现增强的相位和幅度补偿以及许多其它射频（RF）参数。

公开(公告)号：WO2006052398A3

公开(公告)日：2007-05-31

申请号：PCT/US2005037416

申请日：2005-10-19

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  YANG RUI ,  BELURI MIHAELA ,  DEMIR ALPASLAN

Inventor： PIETRASKI PHILIP J ,  YANG RUI ,  BELURI MIHAELA ,  DEMIR ALPASLAN

IPC: H04B1/00 ,  H04L27/06

CPC classification number: H04B1/7097 ,  H04B1/712 ,  H04L25/03248

Abstract: A method and apparatus for estimating and correcting baseband frequency error in a receiver. In one embodiment, an equalizer performs equalization on a sample data stream and generates filter tap values based on the equalization. An estimated frequency error signal is generated based on at least one of the filter tap values. A rotating phasor is generated based on the estimated frequency error signal. The rotating phasor signal is multiplied with the sample data stream to correct the frequency of the sample data stream. In another embodiment, a channel estimator performs channel estimation and generates Rake receiver finger weights based on at least one of the finger weights. An estimated frequency error signal is generated based on at least one of the finger weights.

Abstract translation: 一种用于估计和校正接收机中的基带频率误差的方法和装置。 在一个实施例中，均衡器对采样数据流执行均衡，并且基于均衡产生滤波器抽头值。 基于滤波器抽头值中的至少一个产生估计的频率误差信号。 基于估计的频率误差信号产生旋转相量。 将旋转相量信号与样本数据流相乘以校正样本数据流的频率。 在另一个实施例中，信道估计器执行信道估计，并且基于手指权重中的至少一个产生Rake接收机手指权重。 基于手指权重中的至少一个生成估计的频率误差信号。

公开(公告)号：WO2005006567A3

公开(公告)日：2006-03-30

申请号：PCT/US2004015800

申请日：2004-05-20

Applicant: INTERDIGITAL TECH CORP ,  DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  HAQUE TANBIR

Inventor： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  HAQUE TANBIR

IPC: H03D3/00

CPC classification number: H03D3/009

Abstract: A digital baseband (DBB) radio frequency (RF) receiver (105) includes a digital high pass filter compensation (HPFC) module (205) used to suppress group delay variation distortion caused by using low cost analog high pass filters (HPFO) (175A, 175B, 185A, 185B) in the receiver. The digital HPFC module (205) reduces a cutoff frequency, established by the HPFs for the real and imaginary signal component frequency domain responses by providing a first compensation signal having a first predetermined value (K1). The digital HPFC module adjusts the gain of the high pass response of the real and imaginary signal component frequency domains by providing a second compensation signal having a second predetermined value (K2).

Abstract translation: 数字基带（RFB）射频（RF）接收机（105）包括数字高通滤波器补偿（HPFC）模块（205），用于抑制使用低成本模拟高通滤波器（HPFO）（175A）引起的群延迟变化失真 ，175B，185A，185B）。 数字HPFC模块（205）通过提供具有第一预定值（K1）的第一补偿信号来减少由HPF为实信号分量和虚信号分量频域响应建立的截止频率。 数字HPFC模块通过提供具有第二预定值（K2）的第二补偿信号来调整实信号分量频域和虚信号分量频域的高通响应的增益。

公开(公告)号：WO2005002063A3

公开(公告)日：2005-10-13

申请号：PCT/US2004013486

申请日：2004-04-30

Applicant: INTERDIGITAL TECH CORP ,  DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  HAQUE TANBIR

Inventor： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  HAQUE TANBIR

IPC: H03C3/40 ,  H04B1/30 ,  H04L27/00 ,  H04L27/04

CPC classification number: H04B1/30 ,  H03C3/406 ,  H04L2027/0016 ,  H04L2027/0018

Abstract: A method and system for determining at least one DC offset compensation value used to suppress carrier leakage occurring on real (184) and imaginary (186) signal paths in an analog radio transmitter when a significant temperature change (168) in the transmitter is detected. At least one DC offset signal having a level that corresponds to the at least one DC offset compensation value is provided to a digital DC offset compensation module which adjusts the DC level of at least one of the real and imaginary signal paths (184 and 186).

Abstract translation: 一种用于当检测到发射机中的显着温度变化（168）时，确定至少一个DC偏移补偿值的方法和系统，所述至少一个DC偏移补偿值用于抑制在模拟无线电发射机中实际（184）和虚（186）信号路径上发生的载波泄漏。 具有对应于至少一个DC偏移补偿值的电平的至少一个DC偏移信号被提供给数字DC偏移补偿模块，其调整实信号路径和虚信号路径（184和186）中的至少一个的DC电平， 。

公开(公告)号：WO2005107060A3

公开(公告)日：2008-07-24

申请号：PCT/US2005009432

申请日：2005-03-21

Applicant: INTERDIGITAL TECH CORP ,  KAZAKEVICH LEONID ,  HAQUE TANBIR ,  DEMIR ALPASLAN ,  TROIANO ROBERT

Inventor： KAZAKEVICH LEONID ,  HAQUE TANBIR ,  DEMIR ALPASLAN ,  TROIANO ROBERT

IPC: H04B1/04 ,  H03C1/62 ,  H03F1/02 ,  H03F1/06 ,  H03F1/14 ,  H03F1/30 ,  H03F3/24 ,  H04K1/02

CPC classification number: H03F3/24 ,  H03F1/0205 ,  H03F1/0211 ,  H03F1/14 ,  H03F1/305 ,  H03F2200/336

Abstract: A method and apparatus that reduces the amount of constellation rotation due to power amplifier (PA 125) insertion phase variation during activation (i.e., turn on) of a transmitter (100). This is accomplished by applying an instantaneous phase rotation (175) during the transmitter turn on at digital baseband (165, 170) to counteract and minimize unwanted phase variations.

Abstract translation: 一种减少由于功率放大器（PA 125）在发射机（100）的激活（即导通）期间的插入相位变化引起的星座旋转量的方法和装置。 这是通过在数字基带（165,170）处的发射机接通期间施加瞬时相位旋转（175）来实现的，以抵消并最小化不期望的相位变化。

公开(公告)号：WO2006052404A3

公开(公告)日：2007-02-22

申请号：PCT/US2005037602

申请日：2005-10-20

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  BELURI MIHAELA ,  DEMIR ALPASLAN

Inventor： PIETRASKI PHILIP J ,  BELURI MIHAELA ,  DEMIR ALPASLAN

IPC: H03H7/30

CPC classification number: H04L25/03019 ,  H04B2201/70701 ,  H04L2025/03687

Abstract: A step-size estimator for controlling the step-size of an adaptive equalizer incorporated in a transceiver, (e.g., a wireless transmit/receive unit (WTRU)). The step-size estimator updates at least one adaptive equalizer tap used by the adaptive equalizer based on an apparent speed of a channel established between the transceiver and another transceiver. The step-size estimator includes a speed estimator, a signal-to-noise ratio (SNR) averager and a step-size mapping unit. The speed estimator is used to estimate the apparent speed of the channel, (i.e., the observed and/or measured rate of change of the channel impulse response). The SNR averager generates a common pilot channel (CPICH) SNR estimate. The step-size mapping unit uses the speed estimate and the CPICH SNR estimate to generate a step-size parameter, µ, and a filter taps leakage factor parameter, a, used by the adaptive equalizer to update the filter tap coefficient.

Abstract translation: 用于控制结合在收发器（例如，无线发射/接收单元（WTRU））中的自适应均衡器的步长的步长估计器。 步长估计器基于在收发器和另一收发器之间建立的通道的视在速度来更新由自适应均衡器使用的至少一个自适应均衡器抽头。 步长估计器包括速度估计器，信噪比（SNR）平均器和步长映射单元。 速度估计器用于估计信道的视在速度（即，观测和/或测量的信道脉冲响应的变化速率）。 SNR平均器生成公共导频信道（CPICH）SNR估计。 步进大小映射单元使用速度估计和CPICH SNR估计来生成步长大小参数μ和由自适应均衡器使用的滤波器抽头泄漏因子参数a，以更新滤波器抽头系数。

公开(公告)号：WO2004012463A3

公开(公告)日：2005-03-24

申请号：PCT/US0323658

申请日：2003-07-28

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN

IPC: H04B1/707 ,  H04L27/00 ,  H04L27/06 ,  H04L27/08

CPC classification number: H04B1/14 ,  H03J2200/02 ,  H04B1/70735 ,  H04B1/708 ,  H04J11/0069 ,  H04L27/0014 ,  H04L2027/0024 ,  H04L2027/0065 ,  H04L2027/0091

Abstract: Method and apparatus for adjusting the frequency of a VCO (46) at a receiver to synchronize the receiver with the transmitter by correlating (66) a synchronization code channel with training sequences to estimate positive and negative offsets (34, 36, 38) which are employed to estimate an error, which is then filtered. The filter (42) output provides voltage controlling the VCO. The same technique may be employed to control a numeric controlled oscillator (NCO) (46).

Abstract translation: 通过将（66）同步码信道与训练序列相关联来估计正和负偏移（34,36,38），用于在接收器处调整VCO（46）的频率以使接收机与发射机同步的方法和装置， 用于估计错误，然后过滤。 滤波器（42）输出提供控制VCO的电压。 可以采用相同的技术来控制数控振荡器（NCO）（46）。

公开(公告)号：WO2004066543A3

公开(公告)日：2004-11-04

申请号：PCT/US2004001963

申请日：2004-01-23

Applicant: INTERDIGITAL TECH CORP ,  DEMIR ALPASLAN ,  GRIECO DONALD M ,  HAIM JOHN W ,  BEDNARZ ANDREW F

Inventor： DEMIR ALPASLAN ,  GRIECO DONALD M ,  HAIM JOHN W ,  BEDNARZ ANDREW F

IPC: H04L12/56 ,  H04W48/02 ,  H04W48/10 ,  H04W48/16 ,  H04W56/00 ,  H04Q7/20

CPC classification number: H04W48/10 ,  H04W48/02 ,  H04W48/16 ,  H04W56/00

Abstract: A method and system for performing initial cell search in wireless communication system wherein unsuitable cells are excluded is disclosed. Stored frequencies are searched exhaustively and initial frequencies are search non-exhaustively. Initial frequencies may be searched exhaustively in certain circumstances. When performing exhaustive initial cell searches, primary synchronization codes that lead to unsuitable cells are excluded from subsequent initial cell searches performed on the same frequency.

Abstract translation: 公开了一种在无线通信系统中执行初始小区搜索的方法和系统，其中排除不适合的小区。 存储的频率被彻底地搜索，并且初始频率被非穷尽地搜索。 在某些情况下，可能会彻底地搜索初始频率。 当执行穷尽的初始小区搜索时，导致不适合小区的主同步码被排除在对相同频率执行的后续初始小区搜索中。

公开(公告)号：WO2007109220A3

公开(公告)日：2007-11-22

申请号：PCT/US2007006784

申请日：2007-03-19

Applicant: INTERDIGITAL TECH CORP ,  MONFET FREDERIC ,  DEMIR ALPASLAN ,  RICHARDS MARK L

Inventor： MONFET FREDERIC ,  DEMIR ALPASLAN ,  RICHARDS MARK L

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B2201/70707

Abstract: A method and apparatus for performing a power efficient cell search in a multi-cell wireless communication system are disclosed. A wireless transmit/receive unit (WTRU) having a memory that stores a cell identification list of prioritized previously top-ranked cell identities (IDs) is used to perform the cell search. A primary synchronization code (PSC) correlation peak location on a received signal is selected. A common pilot channel (CPICH) correlation value is determined by non-coherent integration of a local signal created based on a first cell ID on the cell identification list to the received signal. If the CPICH correlation value is greater than a noise threshold, thus indicating that the first cell ID is a newly found cell ID, or if a last cell ID in the cell identification list is reached, an additional determination is made as to whether there is more than one cell ID on the list having the same timing.

Abstract translation: 公开了一种用于在多小区无线通信系统中执行功率有效的小区搜索的方法和装置。 具有存储器的存储器的无线发送/接收单元（WTRU）被用于执行小区搜索，所述存储器存储优先化先前排列最高的小区标识（ID）的小区标识列表。 选择接收信号上的主同步码（PSC）相关峰位置。 公共导频信道（CPICH）相关值通过基于小区识别列表上基于第一小区ID创建的本地信号与接收信号的非相干积分来确定。 如果CPICH相关值大于噪声阈值，则表示第一小区ID是新发现的小区ID，或者如果到达小区识别列表中的最后一个小区ID，则进一步确定是否存在 列表上的多个单元格ID具有相同的时序。

公开(公告)号：WO2006052596A3

公开(公告)日：2006-12-14

申请号：PCT/US2005039635

申请日：2005-11-02

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  BELURI MIHAELA ,  DEMIR ALPASLAN ,  PAN JUNG-LIN ,  STERNBERG GREGORY S ,  YANG RUI ,  LI BIN

Inventor： PIETRASKI PHILIP J ,  BELURI MIHAELA ,  DEMIR ALPASLAN ,  PAN JUNG-LIN ,  STERNBERG GREGORY S ,  YANG RUI ,  LI BIN

IPC: H03H7/30 ,  G06F17/10 ,  H03K5/159 ,  H04B1/10 ,  H04B3/14

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

Abstract: 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.

Abstract translation: 公开了一种自适应均衡器，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。 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，开关和导频幅度参考单元，用于最小化均衡器滤波器的动态范围。 当由均衡器滤波器输出的未掩蔽信号被开关选择以产生馈送到均衡器抽头更新单元的误差信号时，使用动态掩码向量来掩蔽由均衡器抽头更新单元产生的有源抽头。 当由均衡器滤波器输出的掩蔽信号被用于生成误差信号时，使用固定掩蔽矢量来掩蔽由均衡器抽头更新单元生成的有效抽头。