公开(公告)号：WO2005006567A2

公开(公告)日：2005-01-20

申请号：PCT/US2004/015800

申请日：2004-05-20

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir

Inventor： DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir

IPC: H04B

CPC classification number: H03D3/009

Abstract: A digital baseband (DBB) radio frequency (RF) receiver includes a digital high pass filter compensation (HPFC) module used to suppress group delay variation distortion caused by using low cost analog high pass filters (HPFs) in the receiver. The digital HPFC module 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 (K 1 ). 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 (K 2 ).

Abstract translation: 数字基带（RFB）射频接收机包括数字高通滤波器补偿（HPFC）模块，用于抑制在接收机中使用低成本模拟高通滤波器（HPF）引起的群延迟变化失真。 数字HPFC模块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：WO2003032512A1

公开(公告)日：2003-04-17

申请号：PCT/US2002/032470

申请日：2002-10-10

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： DEMIR, Alpaslan ,  OZLUTURK, Fatih, M.

IPC: H04B1/69

CPC classification number: H04B1/708 ,  H04B1/70735 ,  H04B1/7077 ,  H04B1/7093 ,  H04B2201/7071

Abstract: A User Equipment (UE) has as circuit that performs the acquisition for the low chip rate option of the Universal Mobile Telecommunication System (UMTS) Time Division Duplex (TDD) standard as formulated by the Third Generation Partnership Project (3GPP). The present invention implements the detection (10) of the basic SYNC code; the determination (20) of the midamble used and the detection (30) of the superframe timing based on SYNC code modulation sequence. This enables reading of a full Broadcast Channel (BCH) message.

Abstract translation: 用户设备（UE）具有执行由第三代合作伙伴计划（3GPP）制定的通用移动电信系统（UMTS）时分双工（TDD）标准的低码片速率选项的获取的电路。 本发明实现了基本SYNC码的检测（10） 所使用的中间码的确定（20）和基于SYNC码调制序列的超帧定时的检测（30）。 这使得能够读取完整的广播信道（BCH）消息。

公开(公告)号：WO2006052596A2

公开(公告)日：2006-05-18

申请号：PCT/US2005/039635

申请日：2005-11-02

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  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

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：WO2005107060A2

公开(公告)日：2005-11-10

申请号：PCT/US2005/009432

申请日：2005-03-21

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir ,  DEMIR, Alpaslan ,  TROIANO, Robert

Inventor： KAZAKEVICH, Leonid ,  HAQUE, Tanbir ,  DEMIR, Alpaslan ,  TROIANO, Robert

IPC: H03F1/14

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) insertion phase variation during activation (i.e., turn on) of a transmitter. This is accomplished by applying an instantaneous phase rotation during the transmitter turn on at digital baseband to counteract and minimize unwanted phase variations.

Abstract translation: 一种方法和装置，其减少由于功率放大器（PA）在发射机的激活（即导通）期间的插入相位变化引起的星座旋转量。 这是通过在发射机在数字基带处接通时施加瞬时相位旋转来实现的，以抵消并最小化不期望的相位变化。

公开(公告)号：WO2005002242A3

公开(公告)日：2005-01-06

申请号：PCT/US2004/013882

申请日：2004-05-05

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir

Inventor： DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir

IPC: H04L25/66

Abstract: A communication system including an amplifier (105), a receiver (110), an analog to digital converter (ADC 115) and an insertion phase variation compensation module (120). The amplifier receives a communication signal (150). If the amplifier is enabled, the amplifier amplifies the communication signal and outputs the amplified communication signal to the receiver. If the amplifier is disabled, the amplifier passes the communication signal to the receiver without amplifying it. The receiver outputs an analog complex signal to the ADC. The ADC outputs a digital complex signal to the insertion phase variation compensation module which counteracts the effects of a phase offset intermittently introduced into the communication signal when the amplifier is enabled or disabled.

公开(公告)号：WO2005002112A2

公开(公告)日：2005-01-06

申请号：PCT/US2004/014615

申请日：2004-05-10

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  KEARNEY, Kenneth, P.

Inventor： DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  KEARNEY, Kenneth, P.

IPC: H04L

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较差的低成本模拟无线电部件容差导致的性能下降，无线通信发射机采用控制过程来实施多种数字信号处理（DSP）技术来补偿 对于这些模拟组件的缺陷，可以放宽现代规范。 通过监测与模拟无线电相关的多个参数，例如温度，偏置电流等，可以实现增强的相位和幅度补偿以及许多其他射频（RF）参数。

公开(公告)号：WO2007109220A2

公开(公告)日：2007-09-27

申请号：PCT/US2007/006784

申请日：2007-03-19

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  MONFET, Frederic ,  DEMIR, Alpaslan ,  RICHARDS, Mark, L.

Inventor： MONFET, Frederic ,  DEMIR, Alpaslan ,  RICHARDS, Mark, L.

IPC: H04B1/707

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效率小区搜索的方法和设备。 具有存储优先化先前排名最高的小区标识（ID）的小区标识列表的存储器的无线发射/接收单元（WTRU）被用于执行小区搜索。 选择接收信号上的主同步码（PSC）相关峰值位置。 公共导频信道（CPICH）相关值通过基于小区标识列表上的第一小区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，从而指示第一小区ID是新发现的小区ID，或者如果达到小区标识列表中的最后一个小区ID，则做出关于是否存在的附加确定 列表中的多个单元ID具有相同的时间。

公开(公告)号：WO2005002082A1

公开(公告)日：2005-01-06

申请号：PCT/US2004/014108

申请日：2004-05-06

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  OZLUTURK, Fatih ,  NARAYAN, Geetha, Lakshmi

Inventor： DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  OZLUTURK, Fatih ,  NARAYAN, Geetha, Lakshmi

IPC: H04B7/00

CPC classification number: H04B1/30 ,  H03D3/008

Abstract: A digital baseband (DBB) receiver for receiving and processing a wireless communication signal. The DBB receiver includes at least one low noise amplifier (LNA), at least one demodulator, a direct current (DC) discharge circuit and an LNA control circuit. The LNA selectively amplifies the communication signal. The demodulator outputs analog real and imaginary signal components on real and imaginary signal paths, respectively, in response to receiving the communication signal from the LNA. The DC discharge circuit selectively discharges DC accumulating on at least one of the real and imaginary signal paths. The LNA control circuit turns the LNA on or off.

Abstract translation: 一种用于接收和处理无线通信信号的数字基带（DBB）接收机。 DBB接收器包括至少一个低噪声放大器（LNA），至少一个解调器，直流（DC）放电电路和LNA控制电路。 LNA选择性地放大通信信号。 解调器响应于接收到来自LNA的通信信号，分别在实信号路径和虚信号路径上输出模拟实信号和虚信号分量。 直流放电电路选择性地放电积累在实信号路径和虚信号路径中的至少一个上的DC。 LNA控制电路打开或关闭LNA。

公开(公告)号：WO2005002063A2

公开(公告)日：2005-01-06

申请号：PCT/US2004/013486

申请日：2004-04-30

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir

Inventor： DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir

IPC: H04B

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 and imaginary signal paths in an analog radio transmitter when a significant temperature change 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.

Abstract translation: 一种用于在检测到发射机中的明显的温度变化时，确定至少一个DC偏移补偿值用于抑制在模拟无线电发射机的实信号路径和虚信号路径上发生的载波泄漏的方法和系统。 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中的至少一个的DC电平。

公开(公告)号：WO2004012463A2

公开(公告)日：2004-02-05

申请号：PCT/US2003/023658

申请日：2003-07-28

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： DEMIR, Alpaslan

IPC: H04Q

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 at a receiver to synchronize the receiver with the transmitter by correlating a synchronization code channel with training sequences to estimate positive and negative offsets which are employed to estimate an error, which is then filtered. The filter output provides voltage controlling the VCO. The same technique may be employed to control a numeric controlled oscillator (NCO).

Abstract translation: 用于通过将同步码信道与训练序列相关联来估计用于估计错误的正和负偏移的方法和装置，用于在接收机处调整VCO的频率以使接收机与发射机同步，然后对其进行滤波。 滤波器输出提供VCO的电压控制。 可以采用相同的技术来控制数控振荡器（NCO）。