-
公开(公告)号:AT446623T
公开(公告)日:2009-11-15
申请号:AT07011317
申请日:2000-10-31
Applicant: QUALCOMM INC
Inventor: PADOVANI ROBERTO , BLACK PETER , SINDHUSHAYANA NAGABHUSHANA
Abstract: An apparatus for transmitting pilot references from a plurality of transmission sources, comprises a receiver for receiving, at each transmission source, one or more signals indicative of a time reference for the communication system. The apparatus generates, at each transmission source, a plurality of pilot bursts for a pilot reference; and transmits the plurality of pilot bursts in synchronization with the time reference from each transmission source.
-
公开(公告)号:AT403978T
公开(公告)日:2008-08-15
申请号:AT02702159
申请日:2002-02-06
Applicant: QUALCOMM INC
Inventor: GLAZKO SERGUEI , BLACK PETER , CHALLA RAGHU
IPC: H04B1/7073 , H04B7/26
Abstract: Techniques to search for a gated pilot reference in a wireless communication system. In one method, an overall code space in which the pilot may be found is partitioned into a number of groups of code sets, with each code set representative of all possible chip offsets of a specific PN sequence. The groups are ordered based on the likelihood of detecting the pilot in each of the groups. The groups of code sets are then used to search for the pilot, one group at a time, starting with the group most likely to result in successful pilot acquisition and ending with the group least likely to result in successful pilot acquisition. The search is terminated upon successful acquisition. The pilot search may be performed using detect, dwell, and pull-in substages. The detect substage for one group may be performed in parallel with the pull-in substage for another group.
-
公开(公告)号:BR0308216A
公开(公告)日:2005-05-10
申请号:BR0308216
申请日:2003-03-04
Applicant: QUALCOMM INC
Inventor: SINDHUSHAYANA NAGABHUSHANA , BLACK PETER , ATTAR RASHID A
Abstract: Methods and apparatus for estimating maximum rate of data and for estimating a transmission power required for transmission of a data with a rate of data in a communication system are disclosed. A terminal determines a quality metric of a communication link, over which data are to be transmitted, and modifies the determined quality metric by a quality metric margin. The terminal then estimates the maximum rate of data in accordance with the modified quality metric. Alternatively, the terminal then estimates transmission power required for transmission of a data with a rate of data in accordance with the rate of data and the modified quality metric. The quality metric margin may be pre-determined or dynamically adjusted. The terminal dynamically adjusts the quality metric margin in accordance with a result of comparison of a transmit power corresponding to the estimated maximum rate of data with an actual transmit power used to transmit the data.
-
公开(公告)号:HK1050450A1
公开(公告)日:2003-06-20
申请号:HK03102514
申请日:2003-04-09
Applicant: QUALCOMM INC
Inventor: PADOVANI ROBERTO , SINDHUSHAYANA NAGABHUSHANA , WHEATLEY CHARLES III , BENDER PAUL , BLACK PETER , GROB MATTHEW , HINDERLING JURG
IPC: H04W40/16 , H04B1/7103 , H04B7/005 , H04L1/00 , H04L1/08 , H04L1/16 , H04L1/18 , H04L12/56 , H04L29/08 , H04W16/14 , H04W24/00 , H04W28/22 , H04W52/04 , H04W52/12 , H04W52/24 , H04W52/26 , H04W52/40 , H04W72/08
Abstract: In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.
-
公开(公告)号:HK1049936A1
公开(公告)日:2003-05-30
申请号:HK03102077
申请日:2003-03-21
Applicant: QUALCOMM INC
Inventor: BLACK PETER , HOWARD MICHAEL
IPC: H04L20060101 , H04L27/20 , H03F20060101 , H04B1/707 , H04L27/36
Abstract: Techniques to adjust the phase rotation of a modulated signal to compensate for the phase rotation introduced by circuit elements associated with the transmit signal path. In one implementation, at least one control signal is received, with each control signal being provided to adjust a particular characteristic (e.g., gain, bias current) of one or more circuit elements (e.g., VGA, PA) associated with the transmit signal path. The circuit elements can be located directly in, or operatively coupled to, the transmit signal path. A phase rotation corresponding to an operating state defined by the received control signal(s) is then determined, and the phase of the modulated signal is rotated by an amount related to the determined phase rotation. The phase rotation compensation can be performed at various locations along the transmit signal path by rotating either the data, the PN sequences used to spectrally spread the data, or the carrier signals used to modulate the data.
-
公开(公告)号:HUE037020T2
公开(公告)日:2018-08-28
申请号:HUE07008516
申请日:2004-02-02
Applicant: QUALCOMM INC
Inventor: BHUSHAN NAGA , CHAPONNIERE ETIENNE FRANCOIS , BLACK PETER , TSE DAVID NGAR CHING
-
公开(公告)号:ES2675181T3
公开(公告)日:2018-07-09
申请号:ES07008516
申请日:2004-02-02
Applicant: QUALCOMM INC
Inventor: BHUSHAN NAGA , CHAPONNIERE ETIENNE FRANCOIS , BLACK PETER , TSE DAVID NGAR CHING
IPC: H04W16/14 , H04W52/56 , H04B7/005 , H04W40/02 , H04W52/26 , H04W52/34 , H04W72/08 , H04W72/12 , H04W74/00
Abstract: Un procedimiento para la comunicación entre uno de una pluralidad de usuarios (104) y una estación transmisora remota (102) a través de una pluralidad de canales de comunicación compartidos (106), estando cada uno de los canales de comunicación compartidos (106) caracterizado por al menos uno de frecuencia de transmisión, tiempo de transmisión y antena transmisora en un sistema de comunicación, en el que cada uno de los canales de comunicación compartidos (106) se usa para admitir una pluralidad de enlaces de comunicación (106A - 106D), y cada uno de los enlaces de comunicación (106A - 106D) con un usuario puede ser a través de un canal compartido o de múltiples canales compartidos, comprendiendo el procedimiento: recibir una asignación para al menos uno de la pluralidad de canales de comunicación compartidos (106); transmitir un informe de calidad del enlace a la estación transmisora remota (102), estando asociado el informe de calidad del enlace con una métrica de planificación asignada a cada uno de la pluralidad de enlaces de comunicación (106A - 106D) en la pluralidad de canales de comunicación compartidos; recibir datos a través de uno o más de los enlaces de comunicación (106A - 106D), estando seleccionados los enlaces de comunicación (106A - 106D) basándose en la métrica de planificación asignada, en el que la métrica de planificación se determina en base a una proporción de calidad del enlace de comunicación del usuario de un enlace y un rendimiento de datos de usuario promedio del enlace.
-
公开(公告)号:ES2380792T3
公开(公告)日:2012-05-18
申请号:ES99951526
申请日:1999-09-22
Applicant: QUALCOMM INC
Inventor: BLACK PETER , KARMI GADI , SINDHUSHAYANA NAGABHUSHANA
Abstract: Un aparato para transmitir un paquete de datos de usuario de velocidad variable, que comprende: un codificador (520) para codificar el paquete de datos de usuario de velocidad variable, a fin de producir un paquete codificado de datos de usuario de velocidad variable; un multiplexor (500) para multiplexar en el tiempo datos de indicación de velocidad y datos piloto sobre dos o más ranuras temporales de una trama temporal, a fin de producir un paquete de datos de control; en donde los datos de indicación de control indican la velocidad de transmisión del paquete de datos de usuario de velocidad variable; un ajustador (526) de ganancia para ajustar la ganancia del paquete de datos de usuario de velocidad variable, en base a la velocidad de datos del paquete de datos de usuario de velocidad variable y al requisito de transmisión Eb/N0; un ensanchador (528) para ensanchar el paquete de datos de usuario de velocidad variable de acuerdo a un primer código de Walsh, y para ensanchar el paquete de datos de control de acuerdo a un segundo código de Walsh, en donde los códigos de Walsh primero y segundo son ortogonales entre sí; un cifrador (534) para cifrar el paquete de datos de control cubierto según Walsh y el paquete codificado de datos de usuario de velocidad variable, cubierto según Walsh, de acuerdo a una secuencia de código en preparación para la transmisión.
-
公开(公告)号:DE60045323D1
公开(公告)日:2011-01-13
申请号:DE60045323
申请日:2000-06-13
Applicant: QUALCOMM INC
Inventor: BONACCORSO MARIO , LING FUNYUN , SIND-HUSHAYANA NAGABHUSHANA , BLACK PETER
IPC: H04B1/707 , H04B1/10 , H04B1/7115 , H04B1/712 , H04B7/08
-
公开(公告)号:AT490608T
公开(公告)日:2010-12-15
申请号:AT06023595
申请日:2000-06-13
Applicant: QUALCOMM INC
Inventor: BONACCORSO MARIO , LING FUNYUN , SIND-HUSHAYANA NAGABHUSHANA , BLACK PETER
IPC: H04B1/7117 , H04B1/10 , H04B1/707 , H04B1/709 , H04B7/08
Abstract: An optimum combiner that reduces the amount of interference imposed upon a first base station (102) by transmissions of other base stations within the same communication system. Two antennas (112, 114) are used to receive transmissions within a receiving station (110). A rake receiver is coupled to each antenna (112, 114). By optimally combining the signals that are received by each independent finger of the rake receiver, interference that is correlated between a finger associated with the first antenna (112) and a finger associated with the second antenna (114) can be minimized with respect to the desired signal. Optimum combining requires determination of optimum combining coefficients. A max-ratio combining algorithm may be substituted for the optimal combining algorithm depending upon interference characteristics.
-
-
-
-
-
-
-
-
-