-
公开(公告)号:HK1096224A1
公开(公告)日:2007-05-25
申请号:HK07103107
申请日:2007-03-22
Applicant: QUALCOMM INC
Inventor: KETCHUM JOHN W , WALLACE MARK S , WALTON RODNEY J , NANDA SANJIV
IPC: H04L20060101 , H04L12/56 , H04L29/06 , H04L29/08
Abstract: Embodiments addressing MAC processing for efficient use of high throughput systems are disclosed. In one aspect, an apparatus comprises a first layer for receiving one or more packets from one or more data flows and for generating one or more first layer Protocol Data Units (PDUs) from the one or more packets. In another aspect, a second layer is deployed for generating one or more MAC frames based on the one or more MAC layer PDUs. In another aspect, a MAC frame is deployed for transmitting one or more MAC layer PDUs. The MAC frame may comprise a control channel for transmitting one or more allocations. The MAC frame may comprise one or more traffic segments in accordance with allocations.
-
公开(公告)号:AR051497A1
公开(公告)日:2007-01-17
申请号:ARP050104809
申请日:2005-11-16
Applicant: QUALCOMM INC
Inventor: KETCHUM JOHN W , WALTON RODNEY J , WALLACE MARK S , HOWARD STEPHEN J , INANOGLU HAKAN
Abstract: Técnicas para descomponer matrices utilizando la rotacion de Jacobi. Multiples iteraciones de la rotacion de Jacobi se llevan a cabo sobre una primera matriz de valores complejos con multiples matrices de rotacion de Jacobi de valores complejos para llevar a cero los elementos que se encuentran fuera de l diagonal en la primera matriz. Par cada iteracion, se puede formar una submatriz en base a la primera matriz y se puede descomponer para obtener vectores propios para la submatriz, y se puede formar una matriz de rotacion de Jacobi con los vectores propios y se puede utilizar para actualizar la primera matriz. Una segunda matriz de valores complejos, la cual contiene vectores ortogonales, se deriva en base a las matrices de rotacion de Jacobi. Para la descomposicion del valor propio, se puede derivar una tercer matriz de valores propios en base a las matrices de rotacion de Jacobi. Para la descomposicion del valor singular, una cuarta matriz con vectores singulares izquierdos y una matriz e valores singulares se pueden derivar en base a las matrices de rotacion de Jacobi.
-
公开(公告)号:BRPI0415426A
公开(公告)日:2006-12-05
申请号:BRPI0415426
申请日:2004-10-15
Applicant: QUALCOMM INC
Inventor: WALTON RODNEY J , NANDA SANJIV
-
公开(公告)号:BR0315607A
公开(公告)日:2005-08-23
申请号:BR0315607
申请日:2003-10-24
Applicant: QUALCOMM INC
Inventor: WALTON RODNEY J , KETCHUM JOHN W , WALLACE MARK S , HOWARD STEVEN J
IPC: H04B7/005 , H04B7/04 , H04B7/06 , H04B7/08 , H04J99/00 , H04L1/00 , H04L1/06 , H04L1/08 , H04L1/16 , H04L12/28 , H04L12/56 , H04L25/02 , H04L25/03 , H04L27/26 , H04W16/28 , H04W52/50
Abstract: A user terminal supports multiple spatial multiplexing (SM) modes such as a steered mode and a non-steered mode. For data transmission, multiple data streams are coded and modulated in accordance with their selected rates to obtain multiple data symbol streams. These streams are then spatially processed in accordance with a selected SM mode (e.g., with a matrix of steering vectors for the steered mode and with the identity matrix for the non-steered mode) to obtain multiple transmit symbol streams for transmission from multiple antennas. For data reception, multiple received symbol streams are spatially processed in accordance with the selected SM mode ( e.g ., with a matrix of eigenvectors for the steered mode and with a spatial filter matrix for the non-steered mode) to obtain multiple recovered data symbol streams. These streams are demodulated and decoded in accordance with their selected rates to obtain multiple decoded data streams.
-
公开(公告)号:AU2003287293A1
公开(公告)日:2004-05-13
申请号:AU2003287293
申请日:2003-10-24
Applicant: QUALCOMM INC
Inventor: WALLACE MARK , KETCHUM JOHN W , WALTON RODNEY J , HOWARD STEVEN J
IPC: H04J99/00 , H04B7/005 , H04B7/04 , H04B7/06 , H04B7/08 , H04L1/00 , H04L1/06 , H04L1/08 , H04L1/16 , H04L5/14 , H04L12/28 , H04L12/56 , H04L25/02 , H04L25/03 , H04L27/26
Abstract: Techniques to calibrate the downlink and uplink channels to account for differences in the frequency responses of the transmit and receive chains at an access point and a user terminal. In one embodiment, pilots are transmitted on the downlink and uplink channels and used to derive estimates of the downlink and uplink channel responses, respectively. Two sets of correction factors are then determined based on the estimates of the downlink and uplink channel responses. A calibrated downlink channel is formed by using a first set of correction factors for the downlink channel, and a calibrated uplink channel is formed by using a second set of correction factors for the uplink channel. The first and second sets of correction factors may be determined using a matrix-ratio computation or a minimum mean square error (MMSE) computation. The calibration may be performed in real time based on over-the-air transmission.
-
公开(公告)号:PL2317687T3
公开(公告)日:2013-09-30
申请号:PL10010614
申请日:2004-10-15
Applicant: QUALCOMM INC
Inventor: NANDA SANJIV , MEYLAN ARNAUD , WALTON RODNEY J
-
公开(公告)号:PT2317687E
公开(公告)日:2013-08-29
申请号:PT10010614
申请日:2004-10-15
Applicant: QUALCOMM INC
Inventor: WALTON RODNEY J , NANDA SANJIV , MEYLAN ARNAUD
-
48.
公开(公告)号:PL2267956T3
公开(公告)日:2012-01-31
申请号:PL10176962
申请日:2004-10-15
Applicant: QUALCOMM INC
Inventor: WALTON RODNEY J , KETCHUM JOHN W , NANDA SANJIV
-
公开(公告)号:BRPI0711887A2
公开(公告)日:2012-01-10
申请号:BRPI0711887
申请日:2007-05-22
Applicant: QUALCOMM INC
Inventor: HOWARD STEVEN J , KETCHUM JOHN W , WALLACE MARK S , WALTON RODNEY J
IPC: H04L1/06
-
公开(公告)号:ES2336118T3
公开(公告)日:2010-04-08
申请号:ES05019630
申请日:2003-10-24
Applicant: QUALCOMM INC
Inventor: WALTON RODNEY J , WALLACE MARK S , KETCHUM JOHN W , HOWARD STEVEN J
IPC: H04B7/02 , H04B7/005 , H04B7/06 , H04B7/08 , H04J99/00 , H04L1/00 , H04L1/06 , H04L1/08 , H04L1/16 , H04L1/18 , H04L12/28 , H04L12/56 , H04L25/02 , H04L25/03 , H04L27/00 , H04L27/26 , H04W28/06 , H04W28/20 , H04W28/22 , H04W52/00 , H04W52/42 , H04W52/50 , H04W72/04 , H04W72/12 , H04W74/00 , H04W74/08 , H04W84/12
Abstract: Un procedimiento de procesar datos para su transmisión en un sistema (800) de comunicación inalámbrica de múltiples entradas y múltiples salidas (MIMO), que comprende: codificar una trama de datos de acuerdo a un esquema de codificación, a fin de obtener una trama de datos codificados; dividir la trama de datos codificados en una pluralidad de subtramas de datos codificados, una subtrama de datos codificados para cada uno de una pluralidad de canales espaciales; intercalar (818) cada subtrama de datos codificados de acuerdo a un esquema de intercalación, a fin de obtener una correspondiente subtrama de datos intercalados, en la cual se obtiene una pluralidad de subtramas de datos intercalados para la pluralidad de canales espaciales; y modular cada subtrama de datos intercalados para obtener un correspondiente flujo de símbolos de modulación, en donde se obtiene una pluralidad de flujos de símbolos de modulación para la pluralidad de canales espaciales; caracterizado por: cifrar (810) la trama de datos para aleatorizar los datos asociados a la trama de datos antes de la etapa de codificación.
-
-
-
-
-
-
-
-
-