公开(公告)号：EP1632033A4

公开(公告)日：2008-02-06

申请号：EP04751813

申请日：2004-05-10

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  KEARNEY KENNETH P

IPC: H04B1/10 ,  H03F1/32 ,  H04B1/04

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.

公开(公告)号：EP1632029A4

公开(公告)日：2008-07-02

申请号：EP04751468

申请日：2004-05-06

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  HAQUE TANBIR

IPC: H04B1/06 ,  H03G3/00 ,  H03G3/30 ,  H04B1/30 ,  H04B7/00 ,  H04B7/005 ,  H04L25/10 ,  H04L27/00 ,  H04L27/08 ,  H04L27/38

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

Abstract: A communication system (100) including an automatic control (AGC) circuit (105), a receiver (110), an analog to digital (ADC) converter (115) and an insertion phase variation compensation module (120). The AGC circuit receives and amplifies communication signals (150). The gain of the AGC circuit is adjusted. The AGC circuit outputsan amplified signal (145) to the receiver which, in turn, outputs an analog complex signal to the ADC (115). The ADC outputs a digital complex signal to the insertion phase variation compensation module (120) which counteracts the effects of phase offsets introduced into the communication signal due to the continuous gain adjustments associated with the AGC circuit.

公开(公告)号：EP1632039A4

公开(公告)日：2006-11-02

申请号：EP04751475

申请日：2004-05-06

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  OZLUTURK FATIH ,  NARAYAN GEETHA LAKSHMI

IPC: H04B7/00 ,  H03D3/00 ,  H04B1/30

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.

公开(公告)号：EP1522151A4

公开(公告)日：2006-05-17

申请号：EP03734443

申请日：2003-06-05

Applicant: INTERDIGITAL TECH CORP

Inventor： AXNESS TIMOTHY A ,  KAZAKEVICH LEONID

IPC: H04J1/00 ,  H03G3/30 ,  H04B1/04 ,  H04B1/26 ,  H04B1/30 ,  H04B1/7103 ,  H04J13/10 ,  H04L5/06 ,  H04L27/26 ,  H04L27/38 ,  H04B1/707

CPC classification number: H04L5/06 ,  H03G3/3052 ,  H04B1/30 ,  H04L27/2608 ,  H04L27/3845

Abstract: A radio communications device such as a receiver, transmitter or transceiver provides direct conversion of quadrature signals between a radio frequency signal and a plurality of resolved channels. The device provides block processing of multiple RF carriers in a wireless communication system using a direct conversion transmitter/receiver and baseband signal processing.

公开(公告)号：EP1456983A4

公开(公告)日：2005-03-30

申请号：EP02798558

申请日：2002-12-19

Applicant: INTERDIGITAL TECH CORP

Inventor： KEARNEY KENNETH P ,  KAZAKEVICH LEONID ,  AXNESS TIMOTHY A ,  NOLAN JAMES

IPC: H04B17/00 ,  H04Q7/34

CPC classification number: H04B17/0087 ,  H04B17/391

Abstract: A method for emulating signal impairments to enable dynamic evaluation of transmit (12 and 14) and receive (13 and 16) modem performance through the use of computer-generated models enabling both an evaluation of system performance as well as a comparison of results (18) obtained from system designs respectively exposed to both impaired and unimpaired conditions to enable direct comparison as well as comparison with standardized measurement values to facilitate system design activities prior to any hardware implementation.

公开(公告)号：EP1488544A4

公开(公告)日：2010-02-24

申请号：EP03745606

申请日：2003-03-25

Applicant: INTERDIGITAL TECH CORP

Inventor： CHITRAPU PRABHAKAR R ,  MENON NARAYAN PARAPPIL ,  OZLUTURK FATIH M ,  KIERNAN BRIAN GREGORY ,  RAHMAN SHAMIN AKBAR ,  CHAO YI-JU ,  KAZAKEVICH LEONID ,  HUNKELER TERESA JOANNE

IPC: H04L12/28 ,  H04L12/56 ,  H04L12/64 ,  H04L12/66 ,  H04L29/06 ,  H04W80/04 ,  H04W88/00 ,  H04W88/16 ,  H04W92/14 ,  H04B7/216 ,  H04J3/00 ,  H04Q7/24

CPC classification number: H04L12/4633 ,  H04L12/5692 ,  H04L12/66 ,  H04L63/0892 ,  H04L2012/6481 ,  H04W12/06 ,  H04W40/02 ,  H04W80/04 ,  H04W84/042 ,  H04W88/005 ,  H04W88/085 ,  H04W88/16 ,  H04W92/04 ,  H04W92/14 ,  Y10S370/913

公开(公告)号：EP1550320A4

公开(公告)日：2006-04-05

申请号：EP03799362

申请日：2003-09-30

Applicant: INTERDIGITAL TECH CORP

Inventor： REDDY GAUTAM G ,  CHITRAPU PRABHAKAR R ,  KAZAKEVICH LEONID ,  HUNKELER TERESA ,  CHANDRA ARTY

IPC: H04B7/26 ,  G01S5/00 ,  H04L12/28 ,  H04L12/56 ,  H04L29/02 ,  H04W4/02 ,  H04W64/00 ,  H04W84/00 ,  H04W88/04 ,  H04W88/06 ,  H04Q7/00

CPC classification number: H04W88/04 ,  G01S5/0027 ,  H04W4/02 ,  H04W64/00 ,  H04W84/00 ,  H04W88/06

Abstract: A wireless network provides controlled wireless communications with multi-mode wireless WTRUs (33, 37). The wireless network has at least one base station (25) having a transceiver operating in an infrastructure communication mode withmulti mode WTRUs and a controller that transmits control signals via infrastructure communications with a WTRU that control peer-to-peer mode communications (40) of that WTRU with other WTRUs. A WTRU has transceiver components configured for selective operation in an infrastructure communication mode with a network base station and in a peer-to-peer communication mode with other WTRUs. The WTRU also has a transceiver controller configured to selectively control peer-to-peer mode communications with other WTRUs based on communication signals received in infrastructure communications with a network base station. Preferably, the transceiver controller is configured to control the transceiver components to switch between infrastructure communication mode and peer-to-peer communication mode based on(duality of Service criteria).

公开(公告)号：EP1512237A4

公开(公告)日：2005-11-30

申请号：EP03734444

申请日：2003-06-05

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  YANG RUI

IPC: H03M1/18 ,  H03G3/00 ,  H03G3/20 ,  H03G3/30 ,  H03G7/06 ,  H03M1/12 ,  H04B17/40 ,  H04B17/02

CPC classification number: H03G7/06 ,  H03G3/001 ,  H03M1/1235

Abstract: An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses an analog to digital conversion method that increases the number of effective ADC bits by compressing the baseband input analog signal using a logarithmic circuit. After the compressed analog signal is converted into a digital signal, a digital anti-log process or look-up table (LUT) is used to expand the digital signal back to the original linear scale. The word size of the output of the anti-log process is larger than the input word size due to the nature of the anti-log function. To reduce the word size of the digital signal an open loop normalization technique can be applied.

Abstract translation: 模拟/数字增益控制设备避免了一些与闭环AGC电路性质相关的要求，并且能够毫不费力地满足其余要求，使用模数转换方法，通过压缩该模数转换方法来增加有效ADC位数 基带输入模拟信号采用对数电路。 在将压缩的模拟信号转换为数字信号之后，使用数字反对数处理或查找表（LUT）将数字信号扩展回原始线性比例。 由于反对数函数的性质，反对数进程输出的字大小大于输入字大小。 为了减小数字信号的字长，可以应用开环标准化技术。

公开(公告)号：EP1488532A4

公开(公告)日：2005-07-20

申请号：EP03709422

申请日：2003-03-04

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  KLAHN GERARD ,  OZLUTURK FATIH

IPC: H04B7/08 ,  H04B1/02 ,  H03C7/02 ,  H04B7/02 ,  H04B7/185

CPC classification number: H04B7/0868 ,  H04B7/0811 ,  H04B7/0857

Abstract: Method and apparatus for transfer of signals from multiple antennas down to baseband over a common radio frequency (RF) chain. Antenna selection having greater flexibility and applicability to both uplink and downlink wherein priority is given to the antenna receiving a better quality signal. Measurements are taken during each time slot to determine the weighting to be given to the antenna with the better quality signal. Techniques and apparatus are provided to take measurements over a range of intervals from time slots to single symbols, for example, to select the best signal the techniques described herein may be used individual, and in some cases are combined to receive additional benefits in efficiency.

公开(公告)号：EP1634464A4

公开(公告)日：2008-08-13

申请号：EP04776082

申请日：2004-05-21

Applicant: INTERDIGITAL TECH CORP

Inventor： AXNESS TIMOTHY A ,  KAZAKEVICH LEONID

IPC: H04Q1/00 ,  H04B1/00 ,  H04B1/10 ,  H04B1/44 ,  H04Q20060101

CPC classification number: H04B1/0057 ,  H04B1/525

Abstract: A multi-mode wireless transmit/receive unit (WTRU) includes at least one antenna, first and second communication mode receivers and a first communication mode transmitter. The first and second receivers simultaneously receive signals from the antenna. The first transmitter generates and sends a first type of signal to the antenna while, at the same time, the second receiver receives a second type of signal from the antenna. In a preferred embodiment, the WTRU further includes a vector multiplier configured to reduce or eliminate interference of signals received by the second receiver, the interference being caused by the first transmitter. The vector multiplier adjusts the phase and amplitude of noise (i.e., spurious in-band noise) measured by the second receiver. The WTRU may further include a second communication mode transmitter configured to generate and send a second type of signal to the antenna.