公开(公告)号：CA2791788A1

公开(公告)日：2002-11-21

申请号：CA2791788

申请日：2002-05-15

Applicant: QUALCOMM INC

Inventor： LAROCCA JUDITH ,  IRVINE A CHRIS ,  LEVIN JEFFREY A

IPC: G06F17/14 ,  H04N7/30 ,  G06F7/00 ,  G06T9/00 ,  H03M7/30 ,  H04N1/32 ,  H04N1/41 ,  H04N7/12 ,  H04N7/50

Abstract: An apparatus to determine a transform of a block of encoded data the block of encoded data comprising a plurality of data elements. An input register is configured to receive a predetermined quantity of data elements. At least one butterfly processor is coupled to the input register and is configured to perform at least one mathematical operation on selected pairs of data elements to produce an output of processed data elements. At least one intermediate register is coupled to the butterfly processor and configured to temporarily store the processed data. A feedback loop is coupled to the intermediate register and the butterfly processor, and where if enabled, is configured to transfer a first portion of processed data elements to the appropriate butterfly processor to perform additional mathematical operations and where if disabled, is configured to transfer a second portion of processed data elements to at least one holding register.

公开(公告)号：CA2446874A1

公开(公告)日：2002-11-21

申请号：CA2446874

申请日：2002-05-15

Applicant: QUALCOMM INC

Inventor： LAROCCA JUDITH ,  LEVIN JEFFREY A ,  IRVINE CHRIS A

IPC: G06F17/14 ,  G06F7/00 ,  G06T9/00 ,  H03M7/30 ,  H04N1/32 ,  H04N1/41 ,  H04N7/12 ,  H04N7/30 ,  H04N7/50

Abstract: An apparatus to determine a transform of a block of encoded data the block o f encoded data comprising a plurality of data elements. An input register is configured to receive a predetermined quantity of data elements. At least on e butterfly processor is coupled to the input register and is configured to perform at least one mathematical operation on selected pairs of data elemen ts to produce an output of processed data elements. At least one intermediate register is coupled to the butterfly processor and configured to temporarily store the processed data. A feedback loop is coupled to the intermediate register and the butterfly processor, and where if enabled, is configured to transfer a first portion of processed data elements to the appropriate butterfly processor to perform additional mathematical operations and where if disabled, is configured to transfer a second portion of processed data elements to at least one holding register.

公开(公告)号：MXPA01008012A

公开(公告)日：2002-04-10

申请号：MXPA01008012

申请日：2000-02-08

Applicant: QUALCOMM INC

Inventor： LEVIN JEFFREY A

IPC: H04B1/7085 ,  H04B1/707

Abstract: Con objeto de compensar en tiempo una senal de entrada, un receptor desmodula una primera instancia de una senal para producir un primer conjunto de valores de energia correspondientes a un conjunto de valores de datos posibles de la senal (200, 270). El receptor desmodula tambien una segunda instancia de la senal para producir un segundo conjunto de valores de energia correspondientes al conjunto de valores de datos posibles (208, 272). El receptor combina los conjuntos de valores de energia primero y segundo para determinar un conjunto combinado de valores de energia (210, 276) El receptor determina un primer estimado de un valor de datos mas probablemente transmitido con base en el conjunto combinado de valores de energia (202, 278). El receptor descubre un conjunto inicial de muestras reagrupadas de la primera instancia utilizando un simbolo correspondiente al primer estimado para producir un primer valor de energia inicial. El receptor descubre un conjunto posterior de muestras reagrupadas de la primera instancia utilizando el simbolo correspondiente al primer estimado para producir un primer valor de energia posterior (214, 284). Finalmente, el receptor determina una compensacion de tiempo de la primera instancia con base en los primeros valores de energia inicial y posterior.

公开(公告)号：BR9916106A

公开(公告)日：2001-12-18

申请号：BR9916106

申请日：1999-12-09

Applicant: QUALCOMM INC

Inventor： LEVIN JEFFREY A ,  RIDDLE CHRISTOPHER C ,  SHERMAN TOM B

IPC: H04B1/7117 ,  H04B1/7115 ,  H04B1/712 ,  H04B7/26 ,  H04B1/707

Abstract: A wireless receiver receiving multipath Wash-code symbols determines which of fingers 402, 410 have locked on a signal. Measurements of the correlation energies between the received signal and all possible symbols are stored in energy storage units 404, 412. The actual signals are combined in combiner 408. A maximum determiner 416 determines the most likely combined symbol, and an index for this symbol is fed back to the energy storage units. Lock detectors 406, 414 use the measurement for this fed-back symbol to determine whether the finger has locked onto a path. This determination is used to decide whether the next signal detected by that finger should be applied to the combiner.

公开(公告)号：NO20013839L

公开(公告)日：2001-10-05

申请号：NO20013839

申请日：2001-08-07

Applicant: QUALCOMM INC

Inventor： LEVIN JEFFREY A ,  RIDDLE CHRISTOPHER C ,  SHERMAN TOM

IPC: H04B1/7085 ,  H04B1/707

Abstract: In order to time track an incoming signal, a receiver demodulates a first instance of a signal to produce a first set of energy values corresponding to a set of possible data values of the signal. The receiver also demodulates a second instance of the signal to produce a second set of energy values corresponding to the set of possible data values. The receiver combines the first and the second sets of energy values to determine a combined set of energy values. The receiver determines a first estimate of a most likely transmitted data value based upon the combined set of energy values. The receiver decovers an early set of despread samples of the first instance using a symbol corresponding to the first estimate to produce a first early energy value. The receiver decovers a late set of despread samples of the first instance using the symbol corresponding to the first estimate to produce a first late energy value. Finally, the receiver determines a time offset of the first instance based upon the first early and the first late energy values.

公开(公告)号：NO20012829D0

公开(公告)日：2001-06-08

申请号：NO20012829

申请日：2001-06-08

Applicant: QUALCOMM INC

Inventor： LEVIN JEFFREY A ,  RIDDLE CHRISTOPHER C ,  SHERMAN TOM B

IPC: H04B1/7117 ,  H04B1/7115 ,  H04B1/712 ,  H04B7/26 ,  H04B

Abstract: A wireless receiver receiving multipath Wash-code symbols determines which of fingers 402, 410 have locked on a signal. Measurements of the correlation energies between the received signal and all possible symbols are stored in energy storage units 404, 412. The actual signals are combined in combiner 408. A maximum determiner 416 determines the most likely combined symbol, and an index for this symbol is fed back to the energy storage units. Lock detectors 406, 414 use the measurement for this fed-back symbol to determine whether the finger has locked onto a path. This determination is used to decide whether the next signal detected by that finger should be applied to the combiner.

公开(公告)号：BR9814955A

公开(公告)日：2000-10-03

申请号：BR9814955

申请日：1998-11-10

Applicant: QUALCOMM INC

Inventor： MILLER DAVID S ,  VIJAYAN RAJIV ,  ZEHAVI EPHAIM ,  LEVIN JEFFREY A

IPC: H04B1/707 ,  H04B7/185 ,  H04B7/216 ,  H04B7/26 ,  H04Q7/36

公开(公告)号：AU3608300A

公开(公告)日：2000-09-14

申请号：AU3608300

申请日：2000-02-24

Applicant: QUALCOMM INC

Inventor： LEVIN JEFFREY A ,  RIDDLE CHRISTOPHER C ,  SHERMAN THOMAS R

IPC: H04B1/707 ,  H04B1/7115 ,  H04B1/712 ,  H04B7/26

Abstract: In a remote unit receiver capable of demodulating a plurality of signal instances corresponding to a singe remote unit transmitted signal, a first instance of a signal is demodulated to produce a first set of energy values corresponding to a set of possible data values of the signal. A second instance of the signal is demodulated to produce a second set of energy values corresponding to the set of possible data values. The first and the second sets of energy values are then combined to determine a combined set of energy values. A first estimate of a most likely transmitted data value is determined based upon the combined set of energy values An energy level of the first instance is determined based upon the energy value within the first set of energy values corresponding to the first estimate of the most likely transmitted data value.

公开(公告)号：CA2362057A1

公开(公告)日：2000-08-10

申请号：CA2362057

申请日：2000-02-08

Applicant: QUALCOMM INC

Inventor： SHERMAN TOM ,  RIDDLE CHRISTOPHER C ,  LEVIN JEFFREY A

IPC: H04B1/7085 ,  H04B1/707

Abstract: In order to time track an incoming signal, a receiver demodulates a first instance of a signal to produce a first set of energy values corresponding t o a set of possible data values of the signal (200, 270). The receiver also demodulates a second instance of the signal to produce a second set of energ y values corresponding to the set of possible data values (208, 272). The receiver combines the first and the second sets of energy values to determin e a combined set of energy values (210, 276). The receiver determines a first estimate of a most likely transmitted data value based upon the combined set of energy values (202, 278). The receiver decovers an early set of despread samples of the first instance using a symbol corresponding to the first estimate to produce a first early energy value. The receiver decovers a late set of despread samples of the first instance using the symbol corresponding to the first estimate to produce a first late energy value (214, 284). Finally, the receiver determines a time offset of the first instance based upon the first early and the first late energy values.

公开(公告)号：AU5486699A

公开(公告)日：2000-03-06

申请号：AU5486699

申请日：1999-08-13

Applicant: QUALCOMM INC

Inventor： RIDDLE CHRISTOPHER C ,  LEVIN JEFFREY A

IPC: H03M7/24 ,  G06F7/48 ,  H03M7/34 ,  H03M7/00 ,  H03M3/02

Abstract: A method and apparatus for compressing fixed point signals without introducing a bias. Signals are compressed according to a dithered rounding approach wherein signal values are rounded up and rounded down with approximately equal probability, canceling the bias that would otherwise result from the rounding operation. Numerical properties of the input signal are exploited in order to determine whether the signal value should be rounded up or down. Signal compression may, therefore, be introduced at multiple points within a system without accumulating a signal bias and degrading downstream performance. Further, one bit signal compression may be achieved in a particularly efficient fashion with a minimal amount of hardware.