公开(公告)号：CA2263669A1

公开(公告)日：1998-12-23

申请号：CA2263669

申请日：1998-06-16

Applicant: QUALCOMM INC

Inventor： VIJAYAN RAJIV ,  WOLF JACK K ,  LEE CHONG U ,  ZEHAVI EPHRAIM ,  ODENWALDER JOSEPH P

IPC: H04N21/2315 ,  H03M13/15 ,  H03M13/25 ,  H03M13/27 ,  H03M13/29 ,  H03M13/31 ,  H03M13/45 ,  H04J11/00 ,  H04L1/00 ,  H04L27/26 ,  H04N20060101 ,  H04N21/2383 ,  H04N21/438 ,  H04J1/02 ,  H04J1/00

Abstract: In an orthogonal frequency division multiplexing (OFDM) system (10) which uses an outer Reed-Solomon encoder and interleaver (24) and an inner convolutional encoder (26), after the inner convolutional encoding the data bits are interleaved by an inner interleaver (28), and then grouped into symbols, each symbol having "m" bits. After grouping, the symbols are mapped to a complex plane using quadrature amplitude modulation (QAM). Thus, bits, not symbols, are interleaved by the inner interleaver (28). A receiver (12) performs a soft decision regarding the value of each bit in each complex QAM symbol received.

公开(公告)号：CA2289231A1

公开(公告)日：1998-11-19

申请号：CA2289231

申请日：1998-05-13

Applicant: QUALCOMM INC

Inventor： ODENWALDER JOSEPH P

IPC: H03M13/27 ,  H04B1/04 ,  H04B1/707 ,  H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04L1/08 ,  H04W52/04 ,  H04Q7/00

Abstract: A set of individually gain adjusted subscriber channels (402, 404, 411, 415) are formed via the use of a set of orthogonal subchannel codes (Wc, Ws, Wf) having a small number of PN spreading chips per orthogonal waveform period. Data to be transmitted via one of the transmit channels is low code rate error correction encoded and sequence repeated before being modulated with one of the subchannel codes, gain adjusted, and summed with data modulated using the other subchannel codes. The resulting summed data (410, 420) is modulated using a user long code and a pseudorandom spreading code (PN code) and upconverted for transmission. The use of the short orthogonal codes provides interference suppression while still allowing extensive error correction coding and repetition for time diversity to overcome the Raleigh fading commonly experienced in terrestrial wireless systems. The set of sub-channel codes may comprise four Walsh codes, each orthogonal to the remaining codes of the set. The use of four sub-channels is preferred as it allows shorter orthogonal codes to be used, however, the use of a greater number of channels and therefore longer codes is acceptable. Preferably, pilot data is transmitted via a first one of the transmit channels and power control data transmitted via a second transmit channel. The length, or number of chips, in each channel code may be different to further reduce the peak-to-average transmit power for higher rate data transmission.

公开(公告)号：AU6276298A

公开(公告)日：1998-08-26

申请号：AU6276298

申请日：1998-02-10

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  LIN YU-CHUAN ,  JOU YU-CHEUN ,  ODENWALDER JOSEPH P

IPC: H04L29/06 ,  H04B7/005 ,  H04B7/26 ,  H04L29/08 ,  H04W28/18 ,  H04W28/20 ,  H04W28/22 ,  H04W52/28 ,  H04W52/34 ,  H04W72/04 ,  H04W72/12 ,  H04Q7/22 ,  H04Q7/38

Abstract: In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.

公开(公告)号：AU3291597A

公开(公告)日：1998-01-05

申请号：AU3291597

申请日：1997-05-28

Applicant: QUALCOMM INC

Inventor： ODENWALDER JOSEPH P ,  BUTLER BRIAN K ,  TIEDEMANN EDWARD G JR ,  ZEHAVI EPHRAIM

IPC: H04J3/12 ,  H04J3/16 ,  H04J13/00 ,  H04L1/00 ,  H04L1/08 ,  H04L1/12 ,  H04L1/18 ,  H04L25/02 ,  H04L25/05 ,  H04B1/707

Abstract: A novel and improved method and apparatus for generating a constant data rate channel supporting signaling data transmission in an adjustable rate wireless communication system is described. In accordance with one aspect of the invention the rate at which the channel operates may be adjusted based on the particular use and environmental conditions such that the appropriate data rate up to a maximum capability can be achieved. User data is then placed into frames based on the selected rate. When available, signaling data is added into each frames in a predetermined amount. The resulting frame is encoded, repeated and punctured based on the selected rate and whether signaling data has been introduced, and transmitted via RF signals to the receive system. Upon reception, the frame is processed in accordance with having only user data and with having signaling data. That is, the frame is processed both as if it had signaling data and as if no signaling data were present. Once the frame is processed, the particular processing that is more likely to be correct is determined via error checking. If the signaling data processed frame is more likely to have be correct, the signaling data is separated from the user data and each processed accordingly. If the non-signaling data processing is determined to be more likely to be correct, the frame is processed as if it were entirely comprised of user data.

公开(公告)号：AU3291497A

公开(公告)日：1998-01-05

申请号：AU3291497

申请日：1997-05-28

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  JOU YU-CHEUN ,  ODENWALDER JOSEPH P

IPC: H04B7/26 ,  H04L69/14 ,  H04W28/18 ,  H04Q7/38

Abstract: The present invention is a method and apparatus for transmitting a high rate data packet in a CDMA communication system. The transmission system transmits a first channel assignment message indicating the at least one additional channel that will be used to support the high rate data packet. The first channel assignment message is sent in advance of the onset of high rate data communications. In addition the present invention provides within the first frame of high rate data a duplicate channel assignment message. A remote receiver uses the channel assignment messages to initialize its demodulation elements to receive the additional information carried on the at least one additional channel.

公开(公告)号：MX9707424A

公开(公告)日：1997-12-31

申请号：MX9707424

申请日：1996-03-29

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  ODENWALDER JOSEPH P ,  WHEATLEY CHARLES E III ,  PADOVANI ROBERTO

IPC: H04B1/06 ,  H04B7/00 ,  H04B7/005 ,  H04B7/26 ,  H04B17/00 ,  H04W52/08 ,  H04W52/22 ,  H04W52/24 ,  H04W52/28 ,  H04W52/36 ,  H04W52/60 ,  H05K11/02 ,  H04B07/005 ,  H04B07/26 ,  H04Q07/04

Abstract: Se expone un método y aparato para controlar la energía de transmision en un sistema de comunicacion movil. El método expuesto proporciona un método de control de energía de ciclo cerrado. Una estacion movil (30) proporciona informacion sobre la calidad de la señal recibida a partir de la estacion base (50), y la estacion base (50) responde al ajustar la energía asignada a ese usuario en una señal de estacion base compartida. La energía de transmision se ajusta inicialmente mediante un gran incremento y después salta hacia abajo a una velocidad creciente decendente. La estacion movil (30) también proporciona informacion a la estacion base (50) en cuanto a su velocidad relativa y la estacion base (50) ajusta su energía de transmision de acuerdo con esta informacion de velocidad.

公开(公告)号：ZA974388B

公开(公告)日：1997-12-23

申请号：ZA974388

申请日：1997-05-20

Applicant: QUALCOMM INC

Inventor： ODENWALDER JOSEPH P ,  TIEDEMANN EDWARD G JR ,  JOU YU-CHEUN

IPC: H04B1/707 ,  H04B7/24 ,  H04B7/26 ,  H04J13/00 ,  H04J13/18 ,  H04L1/00 ,  H04B ,  H04L ,  H03C ,  H04M

Abstract: A method for demodulating a received signal comprising complex multiplying (202,204) the received signal by a complex pseudonoise code to produce a complex pseudonoise despread signal (XI,XQ); filtering (214) the complex pseudonoise despread signal to provide a complex filtered pilot signal; multiplying (210) the complex pseudo-noise despread signal by a first demodulation code to provide a first complex demodulated data signal; and phase rotating and scaling (216,218) the first complex demodulated clara signal in accordance with the complex-filtered pilot signal to provide a first soft decision data.

公开(公告)号：CA2257211A1

公开(公告)日：1997-12-11

申请号：CA2257211

申请日：1997-06-09

Applicant: QUALCOMM INC

Inventor： ODENWALDER JOSEPH P

IPC: H04B1/707 ,  H04B7/24 ,  H04B7/26 ,  H04L1/00 ,  H04B1/69 ,  H04Q7/22

Abstract: Method and apparatus for high rate CDMA wireless communication in which a set of individually gain adjusted subscriber channels are formed via the use of a set of orthoganol subchannel codes (W1) having a small number of PN spreading chips per orthogonal wave form period. Data to be transmitted via one of the transmit channels is low code rate error correction encoded (134) and sequence repeated before being modulated with one of the subchannel codes, gain adjusted (152, 154, 156, 158), and summed (160) with data modulated using the other subchannel codes. The resulting summed data is modulated using a user long code and a pseudorandom spreading code (PN code) and upconverted for transmission.

公开(公告)号：MX9705396A

公开(公告)日：1997-10-31

申请号：MX9705396

申请日：1996-01-17

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  TIEDEMANN EDWARD G JR ,  ODENWALDER JOSEPH P ,  ZEHAVI EPHRAIM ,  WHEATLEY CHARLES E III

IPC: H03M13/23 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/7115 ,  H04B7/005 ,  H04B7/26 ,  H04J3/00 ,  H04J3/16 ,  H04J3/22 ,  H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04J13/18 ,  H04L1/00 ,  H04L1/08 ,  H04L5/02 ,  H04W52/26 ,  H04J03/16 ,  H04B07/26

Abstract: Un método y aparato para instalar diversos tipos de datos, y a diversas velocidades, en un formato estructurado de manera unica para su transmision. Los datos para el formateo de transmision pueden ser datos de voz proporcionados por el vocodificador (14) o diferentes tipos de tráfico secundario. Los datos se organizan en estructuras de una duracion de tiempo predeterminada para su transmision por un microprocesador (18). Las estructuras de datos se organizan, dependiendo de que los datos, se encuentren a una de diversas velocidades de transmision de datos. Los datos del vocodificador se proporcionan por el vocodificador (14) a una de varias velocidades de transmision de datos y se organizan en la estructura de acuerdo a un formato predeterminado. Las estructuras pueden formatearse con una asignacion multiple de datos del vocodificador con datos no-vocodificados que se encuentran a una mayor velocidad de transmision de datos de estructura. Los diferentes tipos de datos no-vocodificados pueden organizarse a fin de encontrarse también a la mayor velocidad de transmision de datos de estructura. Pueden proporcionarse datos de control adicionales dentro de las estructuras de datos para soportar diversos aspectos de la transmision y recuperacion después de la recepcion.

公开(公告)号：MX9601213A

公开(公告)日：1997-06-28

申请号：MX9601213

申请日：1995-07-05

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  GILHOUSEN KLEIN S ,  ODENWALDER JOSEPH P ,  ZEHAVI EPHRAIM ,  LEVIN JEFFREY A ,  WHEATLEY CHARLES E III

IPC: H04B7/00 ,  H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04L1/08 ,  H04L01/12 ,  H04L01/08

Abstract: Un método y aparatos para controlar la potencia de transmision en un sistema de comunicaciones de proporcion variable. Una estacion de base (30) monitorea la señal de enlace inverso transmitida a partir de una estacion movil (50). La estacion de base (30) determina si una estacion movil (50) debe incrementar o disminuir su potencia en base ya sea a las tasas de error de las series de bits detectadas por un decodificador (44) o por el nivel de potencia de la señal recibida detectada en un receptor (42). En respuesta a este análisis, un procesador de control (46) genera una señal de control de potencia y transmite esta señal a la estacion movil (30).