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公开(公告)号:AR044873A1
公开(公告)日:2005-10-05
申请号:ARP040102187
申请日:2004-06-23
Applicant: INTERDIGITAL TECH CORP
Inventor: DEMIR ALPASLAN , KAZAKEVICH LEONID , HAQUE TANBIR
Abstract: Un receptor de radio-frecuencia (RF) de banda base digital (DBB) incluye un módulo de compensación de filtro de paso alto digital (HPFC) utilizado para suprimir distorsión en variación de retardo de grupo producida por el uso de filtros de paso alto (HPFs) análogos de bajo costo en el receptor. El módulo HPFC digital reduce una frecuencia de corte, establecida por los HPFs para las respuestas de dominio de frecuencia de componente de señal real e imaginaria proveyendo una primera señal de compensación que tiene un primer valor predeterminado (K1). El módulo HPFC digital ajusta la ganancia de la respuesta de paso alto de los dominios de frecuencia de componente de señal real e imaginaria proveyendo una segunda señal de compensación que tiene un segundo valor predeterminado (K2).
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公开(公告)号:AR044595A1
公开(公告)日:2005-09-21
申请号:ARP040101913
申请日:2004-06-03
Applicant: INTERDIGITAL TECH CORP
Inventor: DEMIR ALPASLAN , KAZAKEVICH LEONID , NARAYAN GEETHA LAKSHMI
Abstract: Un método y sistema para ajustar las características de amplitud y fase de señales de comunicación inalámbrica generadas por un transmisor de radio análogo, en base a señales de control de potencia de transmisión (TPC) recibidas por una estación base (BS) y características conocidas de un amplificador de potencia (PA) incluido en el transmisor. Un módulo de compensación digital pre-distorsión, que tiene vías de señal real e imaginaria, recibe y procesa componentes de señal real e imaginaria utilizados para generar la señal de comunicación inalámbrica. Las características de fase y amplitud de la señal de comunicación inalámbrica son controladas en respuesta a las señales TPC, de manera de corregir las características de amplitud y fase alteradas del PA.
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公开(公告)号:NO20052886A
公开(公告)日:2005-08-08
申请号:NO20052886
申请日:2005-06-14
Applicant: INTERDIGITAL TECH CORP
Inventor: KAZAKEVICH LEONID , DEMIR ALPASLAN , OZLUTURK FAITH
CPC classification number: H04B7/0837 , H04B7/0871 , H04B17/309 , H04B17/318 , H04W52/42
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94.
公开(公告)号:AR041971A1
公开(公告)日:2005-06-01
申请号:ARP030104203
申请日:2003-11-14
Applicant: INTERDIGITAL TECH CORP
Inventor: KAZAKEVICH LEONID , OZLUTURK FATIH M , DEMIR ALPASLAN
Abstract: Se provee una unidad inalámbrica de transmisión/recepción (WTRU) que tiene receptores múltiples con una interfase para combinar senales recibidas para recepción mejorada. Una unidad de control controla selectivamente la energización de los receptores para limitar el consumo de potencia en base a parámetros seleccionados.
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公开(公告)号:CA2528339A1
公开(公告)日:2005-01-06
申请号:CA2528339
申请日:2004-05-06
Applicant: INTERDIGITAL TECH CORP
Inventor: NARAYAN GEETHA LAKSHMI , KAZAKEVICH LEONID , DEMIR ALPASLAN , OZLUTURK FATIH
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 sign al 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.
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公开(公告)号:AU2004253071A1
公开(公告)日:2005-01-06
申请号:AU2004253071
申请日:2004-05-06
Applicant: INTERDIGITAL TECH CORP
Inventor: KAZAKEVICH LEONID , DEMIR ALPASLAN , HAQUE TANBIR
IPC: H04B1/06 , H03G3/00 , H03G3/30 , H04B1/30 , H04B7/00 , H04B7/005 , H04L25/10 , H04L27/00 , H04L27/08 , H04L27/38
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.
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公开(公告)号:AU2004253066A1
公开(公告)日:2005-01-06
申请号:AU2004253066
申请日:2004-05-05
Applicant: INTERDIGITAL TECH CORP
Inventor: KAZAKEVICH LEONID , HAQUE TANBIR , DEMIR ALPASLAN
Abstract: A communication system including an amplifier, a receiver, an analog to digital converter (ADC) and an insertion phase variation compensation module. The amplifier receives a communication signal. 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.
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公开(公告)号:CA2513442A1
公开(公告)日:2004-08-26
申请号:CA2513442
申请日:2004-02-05
Applicant: INTERDIGITAL TECH CORP
Inventor: GRIECO DONALD M , HAIM JOHN W , DEMIR ALPASLAN , PIETRASKI PHILIP J , BEDNARZ ANDREW F , GUCCIONE LOUIS J , CHITRAPU PRABHAKAR R
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公开(公告)号:AU2003290782A1
公开(公告)日:2004-06-15
申请号:AU2003290782
申请日:2003-11-14
Applicant: INTERDIGITAL TECH CORP
Inventor: KAZAKEVICH LEONID , HAQUE TANBIR , DEMIR ALPASLAN , NARAYAN GEETHA LAKSHMI , KEARNEY KENNETH , OZLUTURK FATIH
Abstract: In order to compensate for performance degradation caused by inferior low-cost analog radio component tolerances of an analog radio, a future system architecture (FSA) wireless communication transceiver employs numerous digital signal processing (DSP) techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. Automatic gain control (AGC) functions are provided in the digital domain, so as to provide enhanced phase and amplitude compensation, as well as many other radio frequency (RF) parameters.
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公开(公告)号:CA2506024A1
公开(公告)日:2004-06-03
申请号:CA2506024
申请日:2003-11-14
Applicant: INTERDIGITAL TECH CORP
Inventor: KEARNEY KENNETH , NARAYAN GEETHA LAKSHMI , OZLUTURK FATIH , DEMIR ALPASLAN , HAQUE TANBIR , KAZAKEVICH LEONID
Abstract: In order to compensate for performance degradation caused by inferior low-co st analog radio component (105) tolerances of an analog radio (100), a future system architecture (FSA) wireless communication transceiver employs numerou s digital signal processing techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. Automatic ga in control (110) functions are provided in the digital domain, so as to provide enhanced phase and amplitude compensation, as well as many other radio frequency parameters.
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