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公开(公告)号：NO20024619A
公开(公告)日：2002-11-05
申请号：NO20024619
申请日：2002-09-26
Applicant: INTERDIGITAL TECH CORP
Inventor： KAZAKEVICH LEONID , CABROL PATRICK
CPC classification number: H03F1/0222 , H03F1/02 , H03F1/0205 , H03F1/0233 , H03F1/0261 , H03F1/0266 , H03F1/30 , H03F3/24 , H03F2200/451 , H03F2200/474 , H03G3/3042 , H03G3/3084 , H04B2001/0416 , H04B2001/045 , H04W52/08 , H04W52/52
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公开(公告)号：DE69900818T2
公开(公告)日：2002-08-14
申请号：DE69900818
申请日：1999-03-17
Applicant: INTERDIGITAL TECH CORP
Inventor： POLAN JEFFREY , DICK G , KAZAKEVICH LEONID , OZLUTURK M , REGIS T , TURNER RICHARD
Abstract: The present invention provides a base station architecture that is modular in configuration, lowering the initial cost of implementing a new CDMA telecommunication system for a defined geographical region while allowing for future capacity. The scalable architecture is assembled from a digital base station unit that is configured to support a plurality of simultaneous wireless calls connecting to a conventional public switched telephone network. For initial startup, two base station units are deployed for redundancy in case of a single failure. Additional base station units may be added when the need arises for extra traffic capacity. If sectorization is required, the base station units may be directionally oriented. Coupled to and remote from each base station unit are two amplified antenna modules that contain an omni-directional or an external directional antenna, a high power RF amplifier for transmitted frequencies and a low noise amplifier for received frequencies. A separate power supply module capable of supporting two base station units provides continued service in the event of a mains power outage.
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公开(公告)号：AU1319002A
公开(公告)日：2002-05-06
申请号：AU1319002
申请日：2001-10-12
Applicant: INTERDIGITAL TECH CORP
Inventor： JACQUES ALEXANDER , KAZAKEVICH LEONID , SILVERBERG AVI
Abstract: In a TDD wireless communication system between transmitters and associated receivers, automatic gain control of a receiver is only applied during the corresponding time slot within the TDD signal time frame architecture. Successive received signal strengths are measured and gain levels are stored as estimates for an initial gain level in future time slots of the TDD signal. Estimating techniques, such as averaging or trending of received signal strength over successive time slots, and averaging or trending of gain level settings, provide improved estimation of future initial gain levels.
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公开(公告)号：DE69900818D1
公开(公告)日：2002-03-14
申请号：DE69900818
申请日：1999-03-17
Applicant: INTERDIGITAL TECH CORP
Inventor： POLAN JEFFREY , DICK G , KAZAKEVICH LEONID , OZLUTURK M , REGIS T , TURNER RICHARD
Abstract: The present invention provides a base station architecture that is modular in configuration, lowering the initial cost of implementing a new CDMA telecommunication system for a defined geographical region while allowing for future capacity. The scalable architecture is assembled from a digital base station unit that is configured to support a plurality of simultaneous wireless calls connecting to a conventional public switched telephone network. For initial startup, two base station units are deployed for redundancy in case of a single failure. Additional base station units may be added when the need arises for extra traffic capacity. If sectorization is required, the base station units may be directionally oriented. Coupled to and remote from each base station unit are two amplified antenna modules that contain an omni-directional or an external directional antenna, a high power RF amplifier for transmitted frequencies and a low noise amplifier for received frequencies. A separate power supply module capable of supporting two base station units provides continued service in the event of a mains power outage.
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公开(公告)号：AT212488T
公开(公告)日：2002-02-15
申请号：AT99914923
申请日：1999-03-17
Applicant: INTERDIGITAL TECH CORP
Inventor： POLAN JEFFREY , DICK STEPHEN G , KAZAKEVICH LEONID , OZLUTURK FATIH M , REGIS ROBERT T , TURNER RICHARD
Abstract: The present invention provides a base station architecture that is modular in configuration, lowering the initial cost of implementing a new CDMA telecommunication system for a defined geographical region while allowing for future capacity. The scalable architecture is assembled from a digital base station unit that is configured to support a plurality of simultaneous wireless calls connecting to a conventional public switched telephone network. For initial startup, two base station units are deployed for redundancy in case of a single failure. Additional base station units may be added when the need arises for extra traffic capacity. If sectorization is required, the base station units may be directionally oriented. Coupled to and remote from each base station unit are two amplified antenna modules that contain an omni-directional or an external directional antenna, a high power RF amplifier for transmitted frequencies and a low noise amplifier for received frequencies. A separate power supply module capable of supporting two base station units provides continued service in the event of a mains power outage.
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Patent Agency Ranking
公开(公告)号：AU4490700A
公开(公告)日：2001-11-07
申请号：AU4490700
申请日：2000-04-25
Applicant: INTERDIGITAL TECH CORP
Inventor： KAZAKEVICH LEONID , OZLUTURK FATIH , REZNIK ALEXANDER
IPC: H04L27/227 , H04L27/233 , H04L27/38
Abstract: A system for estimating carrier offset includes includes a transmitter configured to transmit a quadrature modulated signal, and a receiver. The receiver includes an input configured to receive the quadrature modulated signal, a local oscillator configured to generate cosine and sine waves at a carrier frequency of the quadrature modulated signal, at least one cosine mixer configured to generate a carrier frequency demodulated output, at least one sine mixer configured to generate a carrier frequency demodulated output, a plurality of lowpass filters configured to filter the demodulated output of the cosine and sine mixers to produce filtered cosine and sine signal components, and a carrier offset detection processor to estimate a carrier offset between the carrier frequency and a local oscillator frequency based on the filtered output of the lowpass filters.
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公开(公告)号：AU5299201A
公开(公告)日：2001-10-08
申请号：AU5299201
申请日：2001-03-28
Applicant: INTERDIGITAL TECH CORP
Inventor： KAZAKEVICH LEONID , CABROL PATRICK
Abstract: A communication signal input (20) provides a voice or data wireless signal (32) for transmission. A detector (14) removes the modulation component from the spread communication signal and provides a voltage to a voltage-to-current converter (16) controlled by a transmit power control (TPC) signal (26). An output current (30) and the output signal (38) are connected to a current mirror (18) that outputs a bias signal (34) to a radio frequency (RF) power amplifier (12). An independent claim is also included for a method of dynamically biasing an RF power amplifier.
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公开(公告)号：CA2671999A1
公开(公告)日：2000-07-27
申请号：CA2671999
申请日：1999-12-07
Applicant: INTERDIGITAL TECH CORP
Inventor： DICK STEPHEN G , KAZAKEVICH LEONID , OZLUTURK FATIH M
Abstract: The present invention balances the amplitude and phase of a received QPSK signal that may have been corrupted during transmission. The system determines the amplitude of the I and Q symbols of a received signal, compares them, and applies a correction to one or both channels to correct for amplitude imbalance. For phase imbalance, the system calculates the cross-correlation of the I and Q symbols which should average to zero. A correction factor is derived from the cross--correlation and applied to both channels, returning the phase cross-correlation to zero. The output from the system is a signal corrected in both amplitude and phase.
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公开(公告)号：CA2505751A1
公开(公告)日：2000-07-27
申请号：CA2505751
申请日：1999-12-07
Applicant: INTERDIGITAL TECH CORP
Inventor： DICK STEPHEN G , KAZAKEVICH LEONID , OZLUTURK FAITH M
Abstract: The present invention balances the amplitude and phase of a received QPSK signal that may have been corrupted during transmission. The system determines the amplitude of the I and Q symbols of a received signal, compares them, and applies a correction to one or both channels to correct for amplitude imbalance. For phase imbalance, the system calculates the cross-correlation of the I and Q symbols which should average to zero. A correction factor is derived from the cross- correlation and applied to both channels, returning the phase cross-correlation to zero. The output from the system is a signal corrected in both amplitude and phase.
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公开(公告)号：CA2351761A1
公开(公告)日：2000-07-27
申请号：CA2351761
申请日：1999-12-07
Applicant: INTERDIGITAL TECH CORP
Inventor： OZLUTURK FATIH M , KAZAKEVICH LEONID , DICK STEPHEN G
Abstract: The present invention balances the amplitude and phase of a received QPSK signal that may have been corrupted during transmission. The system determin es the amplitude of the I and Q symbols of a received signal, compares them, an d applies a correction to one or both channels to correct for amplitude imbalance. For phase imbalance, the system calculates the cross-correlation of the I and Q symbols which should average to zero. A correction factor is derived from the cross-correlation and applied to both channels, returning t he phase cross-correlation to zero. The output from the system is a signal corrected in both amplitude and phase.
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