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公开(公告)号:AT415740T
公开(公告)日:2008-12-15
申请号:AT02784077
申请日:2002-10-10
Applicant: INTERDIGITAL TECH CORP
Inventor: DEMIR ALPASLAN , OZLUTURK FATIH
IPC: H04B1/707 , H04B1/7073 , H04B1/7077 , H04B1/708 , H04B1/7093 , H04B7/216 , H04B7/26 , H04L7/08
Abstract: A User Equipment (UE) receives and samples communication signals, where the communication signals have a time frame format, a transmission chip rate and a synchronization code associated with a time slot that includes a midamble that indicates a modulation of the synchronization code where a specified modulation of received synchronization codes identifies the timing for a timeslot in which data is to be received. The UE preferably includes a synchronization code determination circuit, a midamble determination circuit, and a phase modulation sequence detection circuit operatively associated with the midamble determination circuit. The UE can be configured for use with the low chip rate option of the Third Generation Partnership Project (3GPP) Universal Mobile Telecommunication System (UMTS) standards that employ a predefined set of downlink SYNC codes that point to midambles which indicate SYNC code modulation sequence to enable reading of data in a subsequent Broadcast Channel (BCH) message.
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公开(公告)号:CA2463499C
公开(公告)日:2008-04-29
申请号:CA2463499
申请日:2002-10-10
Applicant: INTERDIGITAL TECH CORP
Inventor: DEMIR ALPASLAN , OZLUTURK FATIH M
IPC: H04B1/707 , H04B1/7073 , H04B1/7077 , H04B1/708 , H04B1/7093 , H04B7/216 , H04B7/26 , H04L7/08
Abstract: A User Equipment (UE) has as circuit that performs the acquisition for the l ow chip rate option of the Universal Mobile Telecommunication System (UMTS) Tim e Division Duplex (TDD) standard as formulated by the Third Generation Partnership Project (3GPP). The present invention implements the detection (10) of the basic SYNC code; the determination (20) of the midamble used and the detection (30) of the superframe timing based on SYNC code modulation sequence. This enables reading of a full Broadcast Channel (BCH) message.
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公开(公告)号:ES2294517T3
公开(公告)日:2008-04-01
申请号:ES04752756
申请日:2004-05-20
Applicant: INTERDIGITAL TECH CORP
Inventor: DEMIR ALPASLAN , KAZAKEVICH LEONID , HAQUE TANBIR
IPC: H03D3/00
Abstract: Un circuito integrado, IC, (200) para el ajuste de la respuesta en el dominio de la frecuencia de al menos una de las componentes de señal real e imaginaria de una señal de comunicación inalámbrica, de tal modo que el IC comprende: un desmodulador (145), que tiene unas salidas (150, 155) de señal real e imaginaria, estando destinado el desmodulador a recibir la señal de comunicación y a suministrar como salida componentes de señal real e imaginaria de la señal de comunicación, en las salidas de señal real e imaginaria; un módulo digital (205) de compensación de filtro, que tiene caminos de señal real e imaginaria (190, 195); al menos un filtro (175A, 185A) de camino de señal real analógica, en comunicación con la salida (150) de señal real del desmodulador y con el camino (190) de señal del módulo digital de compensación de filtro; y al menos un filtro (175B, 185B) de camino de señal imaginaria analógica, en comunicación con la salida (155) de señal imaginaria del desmodulador y con el camino (195) de señal imaginaria del módulo digital de compensación de filtro, caracterizado por que el módulo digital de compensación de filtro es un módulo digital (205) de compensación de filtro de paso alto; el IC incluye un convertidor de analógico a digital, ADC, (101) con entradas conectadas a los filtros de caminos de señal real e imaginaria, y con salidas (190, 195) de componentes real e imaginaria conectadas, respectivamente, a los caminos de señal real e imaginaria del módulo digital de HPFC, y por que el módulo digital (205) de HPFC incluye: una primera unidad (235A) de retardo de muestra, que suministra como salida una primera señal de salida (250A) de unidad de retardo de muestra, y que recibe como entrada el producto (265a) de una primera señal de compensación que tiene un valor predeterminado K1, por un valor de diferencia (255a), siendo dicho valor de diferencia igual a la componente de señal real (190) menos la salida (250a) de la unidad de retardo de muestra, de manera que dicho producto es sumado a la salida (250a) de la primera unidad de retardo de muestra para formar la primera entrada (270a) de retardo de muestra, un primer multiplicador (225A), que suministra como salida la señal de salida de la primera unidad de retardo de muestra, multiplicada por una segunda señal de compensación que tiene un valor predeterminado (K2); y un primer sumador (230A), que suministra como salida una salida real compensada (280) al restar la salida del primer multiplicador de la salida de componente de señal real (190) del ADC (110).
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公开(公告)号:AT376280T
公开(公告)日:2007-11-15
申请号:AT04752756
申请日:2004-05-20
Applicant: INTERDIGITAL TECH CORP
Inventor: DEMIR ALPASLAN , KAZAKEVICH LEONID , HAQUE TANBIR
IPC: H03D3/00
Abstract: A digital baseband (DBB) radio frequency (RF) receiver includes a digital high pass filter compensation (HPFC) module used to suppress group delay variation distortion caused by using low cost analog high pass filters (HPFs) in the receiver. The digital HPFC module reduces a cutoff frequency, established by the HPFs for the real and imaginary signal component frequency domain responses by providing a first compensation signal having a first predetermined value (K 1 ). The digital HPFC module adjusts the gain of the high pass response of the real and imaginary signal component frequency domains by providing a second compensation signal having a second predetermined value (K 2 ).
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公开(公告)号:DE60216162T2
公开(公告)日:2007-09-20
申请号:DE60216162
申请日:2002-02-04
Applicant: INTERDIGITAL TECH CORP
Inventor: DEMIR ALPASLAN , GRIECO DONALD M
Abstract: A method and an apparatus are disclosed for establishing a communication link between a user equipment (UE) and a base station in a wireless communication network. An incoming communication signal is sampled, wherein the sampling includes generating even and odd signal samples of the communication signal, a signal strength magnitude is approximated for each of the signal samples, and the signal strength magnitudes of the signal samples are accumulated. A peak sample is then identified, wherein the peak sample is the signal sample with a highest accumulated signal strength magnitude, an index value is assigned to the peak sample, wherein the index value indicates a chip location of a primary scrambling code, and a chip offset is assigned to the index value based on the index value. A code group number and slot offset is determined based on the chip offset, the primary scrambling code is retrieved based on the code group number and slot offset, and a search frequency of a UE is adjusted based on the primary scrambling code.
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公开(公告)号:NO20072745A
公开(公告)日:2007-08-02
申请号:NO20072745
申请日:2007-05-30
Applicant: INTERDIGITAL TECH CORP
Inventor: PIETRASKI PHILIP J , DEMIR ALPASLAN , BELURI MIHAELA
IPC: H03H7/30
CPC classification number: H04L25/03019 , H04B2201/70701 , H04L2025/03687
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公开(公告)号:NO20072859A
公开(公告)日:2007-06-05
申请号:NO20072859
申请日:2007-06-05
Applicant: INTERDIGITAL TECH CORP
Inventor: YANG RUI , PIETRASKI PHILIP J , STERNBERG GREGORY S , LI BIN , BELURI MIHAELA C , DEMIR ALPASLAN , PAN JUNG-LIN
IPC: H04B7/005
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
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公开(公告)号:DK1608080T3
公开(公告)日:2007-03-26
申请号:DK05108806
申请日:2002-02-04
Applicant: INTERDIGITAL TECH CORP
Inventor: DEMIR ALPASLAN , GRIECO DONALD M
Abstract: A method and an apparatus are disclosed for establishing a communication link between a user equipment (UE) and a base station in a wireless communication network. An incoming communication signal is sampled, wherein the sampling includes generating even and odd signal samples of the communication signal, a signal strength magnitude is approximated for each of the signal samples, and the signal strength magnitudes of the signal samples are accumulated. A peak sample is then identified, wherein the peak sample is the signal sample with a highest accumulated signal strength magnitude, an index value is assigned to the peak sample, wherein the index value indicates a chip location of a primary scrambling code, and a chip offset is assigned to the index value based on the index value. A code group number and slot offset is determined based on the chip offset, the primary scrambling code is retrieved based on the code group number and slot offset, and a search frequency of a UE is adjusted based on the primary scrambling code.
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公开(公告)号:BRPI0411386A
公开(公告)日:2006-07-18
申请号:BRPI0411386
申请日:2004-05-06
Applicant: INTERDIGITAL TECH CORP
Inventor: DEMIR ALPASLAN , KAZAKEVICH LEONID , HAQUE TANBIR
IPC: H03G3/00 , H03G3/30 , H04B1/30 , H04B7/005 , H04L27/00 , H04L27/38 , H04B1/06 , H04B7/00 , H04L25/10 , H04L27/08
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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40.
公开(公告)号:AR048761A1
公开(公告)日:2006-05-24
申请号:ARP050101478
申请日:2005-04-15
Applicant: INTERDIGITAL TECH CORP
Inventor: KAZAKEVICH LEONID , HAQUE TANBIR , DEMIR ALPASLAN , TROIANO ROBERT
Abstract: Un método y aparato que reducen la cantidad de rotacion de constelacion debida a variacion de fase de insercion de amplificador de potencia (PA) durante la activacion (es decir, encendido) de un transmisor. Esto se logra aplicando una rotacion de fase instantánea durante el encendido del transmisor en banda base digital para contrarrestar y minimizar variaciones de fase no convenientes.
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