公开(公告)号：CA2658346C

公开(公告)日：2013-12-24

申请号：CA2658346

申请日：2007-08-16

Applicant: QUALCOMM INC

Inventor： BLANZ JOSEF J ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: H04W24/10

Abstract: Techniques for sending feedback information in a wireless communication system are described. In one design, precoding control indication (PCI), rank, and channel quality indication (CQI) for data transmission from a transmitter to a receiver may be determined by evaluating different hypotheses. A report may be formed based on the PCI, rank and CQI. The PCI may include a precoding matrix or vector to use for the data transmission. The CQI may include at least one CQI value for at least one transport block to send for the data transmission. The rank and CQI may be combined based on a mapping. For example, the CQI may include one CQI value and fall within a first range of values if one transport block is preferred by the receiver. The CQI may include two CQI values and fall within a second range of values if two transport blocks are preferred.

公开(公告)号：BRPI0715897A2

公开(公告)日：2013-07-30

申请号：BRPI0715897

申请日：2007-08-16

Applicant: QUALCOMM INC

Inventor： BLANZ JOSEF J ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: H04B7/06

Abstract: A method comprising determining precoding control indication (PCI) for data transmission from a transmitter (110) to a receiver (120); determining channel quality indication (CQI) for the data transmission, wherein the determining the CQI for the data transmission comprises: determining one CQI value for one transport block when one transport block is used for the data transmission, and determining two CQI values for two transport blocks when two transport blocks are used for the data transmission; forming a report based on the PCI and the CQI; sending the report to the transmitter (110); and characterized by relating the size and number of the CQI and a rank for the data transmission.

公开(公告)号：BRPI0614755A2

公开(公告)日：2011-04-12

申请号：BRPI0614755

申请日：2006-08-14

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  BLANZ JOSEF J ,  GRANZOW WOLFGANG

IPC: H04B7/26 ,  H04B1/707 ,  H04J13/00 ,  H04J13/16

Abstract: Techniques for transmitting data in a manner to support multi-user scheduling, multiple-input multiple-output (MIMO) transmission, and interference cancellation are described. A base station assigns multiple time segments of a transmission time interval (TTI) to at least one terminal, maps data for each terminal to at least one time segment assigned to the terminal, and spreads the data in each time segment with at least one channelization code used in the TTI. A terminal receives an assignment of at least one time segment from among multiple time segments of the TTI, obtains input samples for the at least one time segment, and despreads the input samples with the at least one channelization code used in the TTI.

公开(公告)号：AT441981T

公开(公告)日：2009-09-15

申请号：AT02768894

申请日：2002-09-24

Applicant: QUALCOMM INC

Inventor： SMEE JOHN E ,  FERNANDEZ-CORBATON IVAN JESUS ,  JAYARAMAN SRIKANT

IPC: H04B7/00 ,  H04B7/005 ,  H04B3/06 ,  H04L25/03

Abstract: Systems and methods according to the present invention are described for adjusting the number of taps in an adaptive equalizer over time as the rate of change of a communications channel varies. The number of taps or "equalizer length" is adjusted based on an estimate of the Doppler frequency between the devices communicating over a channel. The Doppler frequency is reflective of the rate of change of the communications channel. Greater Doppler frequencies indicate a more quickly varying channel, and vice versa. It is therefore desirable to change the equalizer length (by adding or dropping taps) based on a measurement of the Doppler frequency. Equalizer length is increased as the Doppler frequency decreases. Conversely, equalizer length is decreased as the Doppler frequency increases. This enables the equalizer to achieve a better compromise between the competing goals of adaptation speed (less taps) and ISI reduction (more taps).

公开(公告)号：CA2658346A1

公开(公告)日：2008-02-21

申请号：CA2658346

申请日：2007-08-16

Applicant: QUALCOMM INC

Inventor： BLANZ JOSEF J ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: H04B7/06

Abstract: Techniques for sending feedback information in a wireless communication s ystem are described. In one design, precoding control indication (PCI), rank , and channel quality indication (CQI) for data transmission from a transmit ter to a receiver may be determined by evaluating different hypotheses. A re port may be formed based on the PCI, rank and CQI. The PCI may include a pre coding matrix or vector to use for the data transmission. The CQI may includ e at least one CQI value for at least one transport block to send for the da ta transmission. The rank and CQI may be combined based on a mapping. For ex ample, the CQI may include one CQI value and fall within a first range of va lues if one transport block is preferred by the receiver. The CQI may includ e two CQI values and fall within a second range of values if two transport b locks are preferred.

公开(公告)号：HK1099459A1

公开(公告)日：2007-08-10

申请号：HK07106423

申请日：2007-06-14

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  JAYARAMAN SRIKANT ,  SWEET CHARLES WHEELER III

IPC: H04W72/08

Abstract: Systems and methods for adaptively allocating resources between a dedicated reference signal and a traffic signal are disclosed. In an exemplary embodiment, a wireless communication system 100 includes a base station 404. The base station 404 includes a receiver 428 that receives a quality metric 432 from a remote station 106. The quality metric 432 indicates the quality of a signal transmitted from the base station 404 and received by the remote station 106. The base station 404 also includes a resource allocation component 434 that uses the quality metric 432 to allocate a resource between the traffic signal 422 and the dedicated reference signal 418. The base station 404 also includes a transmitter 426 that transmits the traffic signal 422 and the dedicated reference signal 418 to the remote station 106.

公开(公告)号：AU2007202699A1

公开(公告)日：2007-07-05

申请号：AU2007202699

申请日：2007-06-12

Applicant: QUALCOMM INC

Inventor： AGASHE PARAG A ,  GAAL PETER ,  SOLMAN SAMIR S ,  VAYANOS ALKINOOS HECTOR ,  FERNANDEZ-CORBATON IVAN JESUS ,  STEIN JEREMY

IPC: G01S1/00 ,  G01S19/05 ,  G01S19/25 ,  H04B1/707

Abstract: A system and method for assisting an integrated GPS/wireless terminal unit in acquiring one or more GPS satellite signals from the GPS satellite constellation. The invention includes a method for narrowing the PN-code phase search. That is, by accounting for the variables in geographic location and time delay relative to GPS time, the systems and methods of the present invention generate a narrow code-phase search range that enables the terminal unit to more quickly acquire and track the necessary GPS satellites, and thereby more quickly provide accurate position information to a requesting entity.

公开(公告)号：CA2617883A1

公开(公告)日：2007-02-22

申请号：CA2617883

申请日：2006-08-14

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  GRANZOW WOLFGANG ,  BLANZ JOSEF J

IPC: H04B7/26 ,  H04B1/707 ,  H04J13/00 ,  H04J13/16

Abstract: Techniques for transmitting data in a manner to support multi-user scheduling, multiple-input multiple-output (MIMO) transmission, and interference cancellation are described. A base station assigns multiple time segments of a transmission time interval (TTI) to at least one terminal, maps data for each terminal to at least one time segment assigned to the terminal, and spreads the data in each time segment with at least one channelization code used in the TTI. A terminal receives an assignment of at least one time segment from among multiple time segments of the TTI, obtains input samples for the at least one time segment, and despreads the input samples with the at least one channelization code used in the TTI.

公开(公告)号：MXPA06010313A

公开(公告)日：2007-01-19

申请号：MXPA06010313

申请日：2005-03-08

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  JALALI AHMAD ,  ANTONIO FRANKLIN PETER ,  SCHIFF LEONARD NORMAN

IPC: H04B1/707 ,  H04W74/04

Abstract: Se describen sistemas, metodos y aparatos para configurar y acceder a un canal de acceso aleatorio en un sistema de comunicacion de CDMA. El numero de usuarios soportados por un canal de acceso aleatorio puede optimizarse al asignar un tiempo distinto de llegada a cada uno de una pluralidad de usuarios. Cada uno de los usuarios puede ser sincronizado por tiempos y puede transmitir datos en un tiempo que compense un retardo de propagacion para permitir que los datos lleguen al receptor de destino en el tiempo asignado. En un sistema de CDMA, cada uno de los usuarios puede transmitir datos que se propagan con el mismo codigo de propagacion, con la condicion de que las propiedades de correlacion cruzada del codigo sean suficientes para permitir la identificacion de un origen que es el desplazamiento de tiempos con relacion a otro usuario. El tiempo de llegada puede determinarse basandose en el numero de usuarios activos, y puede asignarse tan frecuentemente como cada transmision por cada usuario.

公开(公告)号：BRPI0407686A

公开(公告)日：2006-03-01

申请号：BRPI0407686

申请日：2004-02-23

Applicant: QUALCOMM INC

Inventor： JAYARAMAN SRIKANT ,  SMEE JOHN E ,  FERNANDEZ-CORBATON IVAN JESUS

IPC: H04B7/005 ,  H04B7/02 ,  H04L25/03

Abstract: Techniques for performing equalization of multiple signals received by a terminal in soft handoff with multiple base stations. The received signal at the terminal is conditioned and digitized to provide a stream of received samples (y m ), which is then equalized/filtered (410) with multiple sets of coefficients to provide multiple streams of transmit chip estimates (X k ). One set of coefficients (f k ) is provided for each base station and is used to provide a corresponding stream of transmit chip estimates. The multiple streams of transmit chip estimates are further processed (420) to provide multiple streams of data symbol estimates (d k ), one stream of data symbol estimates for each base station. The multiple streams of data symbol estimates are then scaled (430) with multiple scaling factors (± k ) and combined (432) to provide a stream of combined data symbol estimates (d k ). The processing for the multiple base stations may be performed by a single hardware unit in a time division multiplexed manner.