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公开(公告)号：AU2002244049B2
公开(公告)日：2007-12-20
申请号：AU2002244049
申请日：2002-02-15
Applicant: QUALCOMM INC
Inventor： RAGHUPATHY ARUN , WALKER BRETT C , HOLESTEIN CHRISTIAN , LI TAO , CHALLA RAGHU , KANG INJUP , PETERZELL PAUL E , SEVERSON MATTHEW L , SIH GILBERT C
Abstract: An apparatus and method in a wireless communication system, the apparatus comprising: first means for amplifying a received signal; means for cancelling a DC offset in the amplified signal; second means for digitally amplifying the DC offset cancelled signal; and means for measuring the digitally amplified signal and to control the gains of the first and second amplifying means.
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32.发明专利
公开(公告)号：ES2280877T3
公开(公告)日：2007-09-16
申请号：ES04025922
申请日：2000-12-07
Applicant: QUALCOMM INC
Inventor： CHALLA RAGHU , BARGHOUTI IHAB
Abstract: Un procedimiento para compensar el desvío de frecuencia dentro de una señal de reloj de espera usada durante un modo de funcionamiento de aviso ranurado de una estación móvil inalámbrica, dicha estación móvil en comunicación periódica con una estación base que proporciona señales de cronometraje, comprendiendo dicho procedimiento los pasos de: determinar una frecuencia inicial de la señal del reloj en espera que sigue a la activación de la estación móvil; determinar un factor fijo de compensación del desvío de frecuencia NFDC representativo de una diferencia entre la frecuencia inicial de la señal del reloj en espera y una frecuencia nominal predeterminada estimar un factor dinámico de compensación del desvío de frecuencia NDDC representativo de una diferencia entre la frecuencia inicial y una frecuencia en curso de la señal del reloj en espera; y actualizar iterativamente el factor dinámico de compensación del error de frecuencia NDDC durante el modo de funcionamiento ranurado determinando una cantidad de variación de señal de cronometraje entre la estación móvil y la estación base, y determinando después valores nuevos para el factor dinámico de compensación de frecuencia NDDC aplicando un valor representativo de la cantidad de la variación de señal a un bucle de retroalimentación configurado para proporcionar un nuevo factor dinámico de compensación del error de frecuencia NDDC que tiene un valor seleccionado para conseguir una subsiguiente reducción de la variación de señal.
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公开(公告)号：DE60033069D1
公开(公告)日：2007-03-08
申请号：DE60033069
申请日：2000-12-07
Applicant: QUALCOMM INC
Inventor： CHALLA RAGHU , BARGHOUTI IHAB
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公开(公告)号：CA2620212A1
公开(公告)日：2007-03-01
申请号：CA2620212
申请日：2006-08-24
Applicant: QUALCOMM INC
Inventor： CHALLA RAGHU
Abstract: A graphics engine includes a setup unit and a rendering unit. The setup unit computes coefficients A, B, and C used for interpolating an attribute .nu. o f a triangle to be rendered for a graphics image. The setup unit then derives compressed coefficients Ã, ~B, and ~C based on the coefficients A, B, and C. The compressed coefficients have a fixed-point format with R integer bits le ft of a binary point and T fractional bits right of the binary point, where R&g t;1 and T>=0. R is selected based on the number of bits used for attribute .n u., T is selected based on the screen dimension, and R+T is much less than the number of bits used to represent the coefficients A, B, and C. The rendering unit performs interpolation for the attribute v using the compressed coefficients Ã, ~B, and ~C, and may be implemented with a simple (R+T)-bit n on- saturating accumulator.
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公开(公告)号：BR0308763A
公开(公告)日：2004-12-28
申请号：BR0308763
申请日：2003-03-26
Applicant: QUALCOMM INC
Inventor： BLACK PETER J , SINDHUSHAYANA NAGABHUSHANA , CHALLA RAGHU , SELTMANN KEVIN
Abstract: Systems and techniques for gain control include amplifying a signal with an amplifier having a gain represented by one of a plurality of gain curves depending on a value of a parameter, the signal being amplified at a first one of the parameter values, and controlling the gain of the amplified signal from a predetermined gain curve relating to the gain curve of the amplifier for a second one of the parameter values by adjusting a gain control signal corresponding to a point on the predetermined gain curve as a function of the first one of the parameter values, and applying the adjusted gain control signal to the amplifier. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.
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Patent Agency Ranking
公开(公告)号：BR0213089A
公开(公告)日：2004-12-28
申请号：BR0213089
申请日：2002-10-02
Applicant: QUALCOMM INC
Inventor： CHALLA RAGHU , SIH GILBERT CHRISTOPHER , GLAZKO SERGUEI A
IPC: H04B1/7075 , H04B1/708 , H04B1/7087 , H04B1/7117 , H04B1/707
Abstract: Techniques to acquire pilots over code space and/or frequency errors. In one aspect, pilot acquisition is performed using a number of substages, and some of the substages are pipelined and performed in parallel using different processing elements. A searcher initially searches over a designated code space to find peaks, and these peaks may be re-evaluated. Finger processors then attempt to acquire the candidate peaks. The searcher may be operated to search for the next set of peaks while the finger processors process the current set of peaks. In another aspect, the full range of frequency errors for the pilots is divided into a number of frequency bins. A multi-stage scheme is used to evaluate the bins, and may employ pipelining and parallel processing such that a search for peaks in the next bin is performed while acquisition of peaks found for the current bin is attempted.
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公开(公告)号：AU774691B2
公开(公告)日：2004-07-01
申请号：AU3655901
申请日：2001-01-26
Applicant: QUALCOMM INC
Inventor： AGRAWAL AVNEESH , SIH GILBERT , ROH MARK , BUTLER BRIAN , CHALLA RAGHU
IPC: H04B1/712 , H04B1/7073 , H04B1/7087 , H04B1/7115 , H04B1/7117 , H04L27/00 , H04B1/00
Abstract: A method and apparatus for frequency tracking is described. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated and filtered to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error for that finger.
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公开(公告)号：AU3655901A
公开(公告)日：2001-08-20
申请号：AU3655901
申请日：2001-01-26
Applicant: QUALCOMM INC
Inventor： AGRAWAL AVNEESH , SIH GILBERT , ROH MARK , BUTLER BRIAN , CHALLA RAGHU
IPC: H04B1/712 , H04B1/7073 , H04B1/7087 , H04B1/7115 , H04B1/7117 , H04L27/00 , H04B1/00
Abstract: A method and apparatus for frequency tracking is described. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated and filtered to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error for that finger.
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公开(公告)号：AU2017335889B2
公开(公告)日：2020-09-17
申请号：AU2017335889
申请日：2017-09-28
Applicant: QUALCOMM INC
Inventor： ANG PETER PUI LOK , MUKKAVILLI KRISHNA KIRAN , CHALLA RAGHU , YANG YANG , GOROKHOV ALEXEI YURIEVITCH , JI TINGFANG , SORIAGA JOSEPH BINAMIRA , LEE HEECHOON
Abstract: Techniques are described for wireless communication. A method for wireless communication at a user equipment (UE) includes identifying a transmission timing of a control reference signal transmitted over a radio frequency spectrum band during an OFF duration of the UE with respect to the radio frequency spectrum band, in which the identified transmission timing is relative to a transition from the OFF duration to an ON duration of the UE with respect to the radio frequency spectrum band; receiving the control reference signal at the identified transmission timing; and performing a warm-up procedure, before the ON duration, based at least in part on the identified transmission timing of the control reference signal. A method for wireless communication at a wireless network includes indicating, to the UE, the transmission timing of the control reference signal; and transmitting the control reference signal at the indicated transmission timing. The OFF duration and the ON duration are coordinated with a wireless network.
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公开(公告)号：AU2019221559A1
公开(公告)日：2020-08-13
申请号：AU2019221559
申请日：2019-02-14
Applicant: QUALCOMM INC
Inventor： ZHOU YAN , LUO TAO , GHEORGHIU VALENTIN ALEXANDRU , CHALLA RAGHU , HE RUHUA , LI YONG , VINTOLA TIMO VILLE
Abstract: Certain aspects of the present disclosure relate to methods and apparatus for providing beam switch latency using communications systems operating according to new radio (NR) technologies. For example, the method generally includes determining a latency associated with a beam switch from a source antenna array module to a target antenna array module when the target module is in a low power mode; and signaling a base station to use the determined latency after sending a command for the beam switch.
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