公开(公告)号：US20090290630A1

公开(公告)日：2009-11-26

申请号：US12512203

申请日：2009-07-30

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

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

IPC: H03K5/159 ,  H03K5/08 ,  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：US20090054094A1

公开(公告)日：2009-02-26

申请号：US12258877

申请日：2008-10-27

Applicant: Alpaslan Demir ,  Donald M. Grieco ,  John W. Haim ,  Andrew F. Bednarz ,  Philip J. Pietraski ,  Louis J. Guccione ,  Prabhakar R. Chitrapu

Inventor： Alpaslan Demir ,  Donald M. Grieco ,  John W. Haim ,  Andrew F. Bednarz ,  Philip J. Pietraski ,  Louis J. Guccione ,  Prabhakar R. Chitrapu

IPC: H04B15/00

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70755 ,  H04B1/709 ,  H04B2201/70701 ,  H04W48/16 ,  H04W56/00

Abstract: A method and apparatus for identifying a code group representative of a predetermined number of base stations is disclosed. A chip offset within a frame is input into a first correlator. A plurality of samples of chips at which a primary synchronization code (PSC) has been detected are input into the first correlator. Output of the first correlator is multiplied by the complex conjugate of the PSC to obtain a magnitude for the signals being transmitted at the chips inputted into the first correlator. The magnitude is summed over four frames. The summed signals view of a predetermined set of decision variables is evaluated. A case number, a code group, a timeslot location, and a system frame number are determined based on the evaluation and noise estimation.

Abstract translation: 公开了一种用于识别表示预定数量的基站的代码组的方法和装置。 帧内的码片偏移被输入到第一相关器中。 已经检测到主同步码（PSC）的多个码片样本被输入到第一相关器中。 将第一相关器的输出乘以PSC的复共轭，以获得在输入​​到第一相关器的码片处发送的信号的幅度。 幅度总和在四帧以上。 评估预定的一组决策变量的相加信号视图。 基于评估和噪声估计来确定案例编号，代码组，时隙位置和系统帧编号。

公开(公告)号：US07457347B2

公开(公告)日：2008-11-25

申请号：US11209097

申请日：2005-08-22

Applicant: Philip J. Pietraski ,  Rui Yang ,  Mihaela Beluri ,  Alpaslan Demir

Inventor： Philip J. Pietraski ,  Rui Yang ,  Mihaela Beluri ,  Alpaslan Demir

IPC: H04B1/00

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生成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：US07444144B2

公开(公告)日：2008-10-28

申请号：US10772644

申请日：2004-02-05

Applicant: Alpaslan Demir ,  Donald M. Grieco ,  John W. Haim ,  Andrew F. Bednarz ,  Philip J. Pietraski ,  Louis J. Guccione ,  Prabhakar R. Chitrapu

Inventor： Alpaslan Demir ,  Donald M. Grieco ,  John W. Haim ,  Andrew F. Bednarz ,  Philip J. Pietraski ,  Louis J. Guccione ,  Prabhakar R. Chitrapu

IPC: H04Q7/20 ,  H04J3/06 ,  H04B1/00

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70755 ,  H04B1/709 ,  H04B2201/70701 ,  H04W48/16 ,  H04W56/00

Abstract: A method and system for performing initial cell search is disclosed. Step 1 processing is preformed to detect a peak primary synchronization code (PSC) location (i.e. chip offset or chip location). Step 2 processing is performed to obtain the toffset and code group. Step 3 processing is performed to identify the midamble of a base station with which the WTRU performing the initial cell search may synchronize with.

Abstract translation: 公开了一种用于执行初始小区搜索的方法和系统。 执行步骤1的处理以检测峰值主同步码（PSC）位置（即码片偏移或码片位置）。 执行步骤2处理以获得t偏移量和代码组。 执行步骤3处理以识别执行初始小区搜索的WTRU可与其同步的基站的中间码。

公开(公告)号：US07403555B2

公开(公告)日：2008-07-22

申请号：US11352570

申请日：2006-02-13

Applicant: Alpaslan Demir ,  Fatih M. Ozluturk

Inventor： Alpaslan Demir ,  Fatih M. Ozluturk

IPC: H04B1/707

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

Abstract: A User Equipment (UE) has a 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 of the basic SYNC code; the determination of the midamble used and the detection 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; 使用的midamble的确定和基于SYNC码调制序列的超帧定时的检测。 这使得能够读取完整的广播信道（BCH）消息。

公开(公告)号：US20080020725A1

公开(公告)日：2008-01-24

申请号：US11904063

申请日：2007-09-25

Applicant: Alpaslan Demir ,  Leonid Kazakevich ,  Fatih Ozluturk ,  Geetha Narayan

Inventor： Alpaslan Demir ,  Leonid Kazakevich ,  Fatih Ozluturk ,  Geetha Narayan

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：US07280812B2

公开(公告)日：2007-10-09

申请号：US10832594

申请日：2004-04-27

Applicant: Alpaslan Demir ,  Leonid Kazakevich ,  Fatih Ozluturk ,  Geetha Lakshmi Narayan

Inventor： Alpaslan Demir ,  Leonid Kazakevich ,  Fatih Ozluturk ,  Geetha Lakshmi Narayan

IPC: H04B7/00 ,  H04B7/16 ,  H04B1/16

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：US07248649B2

公开(公告)日：2007-07-24

申请号：US10749634

申请日：2003-12-31

Applicant: Alpaslan Demir ,  Leonid Kazakevich ,  Tanbir Haque

Inventor： Alpaslan Demir ,  Leonid Kazakevich ,  Tanbir Haque

IPC: H03D3/00 ,  H03K9/06

CPC classification number: H04L27/38 ,  H04L27/22

Abstract: A digital baseband (DBB) radio frequency (RF) receiver used for receiving and processing a wireless communication signal. The DBB receiver includes a demodulator, first and second analog low pass filters (LPFs), first and second digital gain control circuits, and a digital time domain compensation module which removes group delay variation distortion, introduced by the first and second analog LPFs, from real and imaginary signal components of the communication signal.

Abstract translation: 用于接收和处理无线通信信号的数字基带（DBB）射频（RF）接收机。 DBB接收机包括解调器，第一和第二模拟低通滤波器（LPF），第一和第二数字增益控制电路以及数字时域补偿模块，其将由第一和第二模拟LPF引入的群延迟变化失真从 通信信号的实信号分量和虚信号。

公开(公告)号：US20060183451A1

公开(公告)日：2006-08-17

申请号：US10736432

申请日：2003-12-15

Applicant: Alpaslan Demir ,  Leonid Kazakevich ,  Tanbir Haque

Inventor： Alpaslan Demir ,  Leonid Kazakevich ,  Tanbir Haque

IPC: H04B1/06 ,  H04B7/00

CPC classification number: H04L27/3809 ,  H03G3/001 ,  H03G3/3052 ,  H04B1/30 ,  H04L27/38 ,  H04L2027/003 ,  H04L2027/0046 ,  H04W52/52

Abstract: A communication system including an automatic control (AGC) circuit, a receiver, an analog to digital converter (ADC) and an insertion phase variation compensation module. The AGC circuit receives and amplifies communication signals. The gain of the AGC circuit is continuously adjusted. The AGC circuit outputs an amplified signal to the receiver which, in turn, outputs an analog complex signal to the ADC. The ADC outputs a digital complex signal to an insertion phase variation compensation module which counteracts the effects of phase offsets introduced into the communication signal due to the continuous gain adjustments associated with the AGC circuit.

Abstract translation: 一种包括自动控制（AGC）电路，接收器，模数转换器（ADC）和插入相位变化补偿模块的通信系统。 AGC电路接收并放大通信信号。 AGC电路的增益不断调整。 AGC电路将放大的信号输出到接收机，接收器又将模拟复合信号输出到ADC。 ADC将数字复合信号输出到插入相位变化补偿模块，该模块抵消由于与AGC电路相关联的连续增益调整而引入到通信信号中的相位偏移的影响。

公开(公告)号：US20050271177A1

公开(公告)日：2005-12-08

申请号：US11205846

申请日：2005-08-17

Applicant: Alpaslan Demir ,  Donald Grieco

Inventor： Alpaslan Demir ,  Donald Grieco

IPC: H04B1/707 ,  H04B7/26 ,  H04J3/06 ,  H04L7/04 ,  H04W48/16

CPC classification number: H04W56/00 ,  H04B1/7083 ,  H04J3/0608 ,  H04J11/0069 ,  H04W48/16

Abstract: A user equipment (UE) for establishing a communication link comprising a first module for processing a received communication signal and generating an index value associated with a primary synchronization code within said communication signal; a second module for generating a scrambling code group number, a slot offset, and secondary synchronization code based on output provided by the first module; a third module for retrieving a primary scrambling code based on the scrambling code group number and slot offset; and a controller coupled to said first module, second module, and third module for controlling an a search frequency of the UE for establishing a communication link.

Abstract translation: 一种用于建立通信链路的用户设备（UE），其包括用于处理所接收的通信信号的第一模块，并且生成与所述通信信号内的主同步码相关联的索引值; 第二模块，用于基于由所述第一模块提供的输出产生扰码组号，时隙偏移和次同步码; 第三模块，用于基于所述扰码组号和时隙偏移来检索主扰码; 以及耦合到所述第一模块，第二模块和第三模块的控制器，用于控制UE用于建立通信链路的搜索频率。