公开(公告)号：AU699534B2

公开(公告)日：1998-12-03

申请号：AU5567596

申请日：1996-04-22

Applicant: QUALCOMM INC

Inventor： ZEHAVI EPHRAIM ,  WOLF JACK K ,  SCHIFF LEONARD N

IPC: H04B7/15 ,  H04J3/24 ,  H04J11/00 ,  H04J13/00 ,  H04L1/00 ,  H04L12/28 ,  H04L12/56 ,  H04W72/04

Abstract: A variable rate transmission system wherein a packet of variable rate data generated by a variable rate data source is modulated on traffic channel by traffic channel modulator if the capacity of the traffic channel is capable of transmitting the packet. And where the packet of variable rate data is modulated onto traffic channel by traffic channel modulator and at least one overflow channel by traffic channel modulator, if the capacity of the traffic channel is less than required to transmit the packet. A receiving system for receiving variable rate data transmitted in accordance with the above.

公开(公告)号：AU5383698A

公开(公告)日：1998-07-15

申请号：AU5383698

申请日：1997-12-11

Applicant: QUALCOMM INC

Inventor： WOLF JACK K ,  ZEHAVI EPHRAIM

IPC: H03M13/25 ,  H04L1/00 ,  H04L27/02 ,  H04L27/04 ,  H04L27/06

公开(公告)号：DK0705512T3

公开(公告)日：1998-05-11

申请号：DK94920280

申请日：1994-06-20

Applicant: QUALCOMM INC

Inventor： BUTLER BRIAN K ,  PADOVANI ROBERTO ,  ZEHAVI EPHRAIM

IPC: H04B1/707 ,  H04L1/00 ,  H04L1/08 ,  H04L25/02 ,  H04L29/08

公开(公告)号：AU3741397A

公开(公告)日：1998-02-20

申请号：AU3741397

申请日：1997-07-29

Applicant: QUALCOMM INC

Inventor： ZEHAVI EPHRAIM ,  WILLENEGGER SERGE ,  ODENWALDER JOSEPH P

IPC: H04B1/709 ,  H04B1/7115 ,  H04B7/26 ,  H04B1/707

Abstract: A method and apparatus for variable rate communication incorporating coherent signal processing and combining is described. Within the receive system, vectors of in-phase and quadrature-phase Walsh correlator output values are generated for each Rake finger over each Walsh symbol period. In-phase and quadrature-phase reference values are generated for each of the Rake fingers by combining the in-phase and quadrature-phase correlator outputs of the most likely Walsh symbols over a series of Walsh symbol periods. The output energies are calculated as the sum of squared in-phase and quadrature-phase values. The vectors of in-phase and quadrature-phases values are then projected on the in-phase and quadrature-phase reference values and weighted by the reference amplitude. The reference amplitude is the square root of the sum of squared in-phase and quadrature-phase values. The vectors of projected and weighted values are summed via coherently combining, and the corresponding values from the other Rake fingers used to obtain a resultant vector of coherently demodulated Walsh correlator outputs.

公开(公告)号：CA2261141A1

公开(公告)日：1998-02-05

申请号：CA2261141

申请日：1997-07-29

Applicant: QUALCOMM INC

Inventor： ZEHAVI EPHRAIM ,  ODENWALDER JOSEPH P ,  WILLENEGGER SERGE

IPC: H04B1/69 ,  H04B7/005 ,  H04L27/227

Abstract: A variable rate communication incorporating coherent signal processing and combining is described. Within the receive system (100, 102 and 106), vectors of in-phase and quadrature-phase Walsh correlator output values (W(i)I and W(i)Q) are generated for each Rake finger over each Walsh symbol period. Inphase and quadrature-phase reference values (R(i)I and R(i)Q) are generated for each of the Rake fingers by combining the in-phase and quadrature-phase correlator outputs of the most likely Walsh symbols over a series of Walsh symbol periods. The most likely Walsh symbols are determined on a symbol-by-symbol basis by summing the Walsh correlator output energies from each finger and selecting the largest. The vectors of in-phase and quadrature-phase values are then projected (116) on the in-phase and quadrature-phase reference values and weighted by the reference amplitude. The vectors of projected and weighted values are summed via coherently combining (118), and the corresponding values from the other Rake fingers used to obtain a resultant vector of coherently demodulated Walsh correlator outputs (120). The coherently demodulated Walsh correlator outputs are used to form soft decisions (134, 136) that are deinterleaved and soft-decision Viterbi decoded.

公开(公告)号：BR9606833A

公开(公告)日：1997-12-30

申请号：BR9606833

申请日：1996-01-17

Applicant: QUALCOMM INC

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

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

Abstract: A method and apparatus for arranging various types of data, and at various rates, into a uniquely structured format for transmission. Data for transmission formatting may be speech data provided by vocoder (14) or different types of secondary traffic. The data organized into frames of a predetermined time duration for transmission by a microprocessor (18). The data frames are organized, depending on the data, to be at one of several data rates. Vocoder data is provided by vocoder (14) at one of several data rates and is organized in the frame according to a predetermined format. Frames may be formatted with a sharing of vocoder data with non-vocoder data to be at a highest frame data rate. Different types of non-vocoder data may be organized so as to also be at the highest frame data rate. Additional control data may be provided within the data frames to support various aspects of the transmission and recovery upon reception.

公开(公告)号：FI965180A

公开(公告)日：1997-02-20

申请号：FI965180

申请日：1996-12-20

Applicant: QUALCOMM INC

Inventor： ANTONIO FRANKLIN P ,  WOLF JACK K ,  GILHOUSEN KLEIN S ,  ZEHAVI EPHRAIM

IPC: H01Q3/26 ,  H04B1/7085 ,  H01Q3/24 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/26 ,  H04L1/06 ,  H04W16/28 ,  H04B

Abstract: A system and method for adaptively sectorizing channel resources within a digital cellular communication system is disclosed herein. The system includes an antenna arrangement for providing at least first and second electromagnetic beams for receiving a first information signal transmitted by a specific one of a plurality of users, thereby generating first and second received signals. A first set of beam-forming signals are then generated from the first and second received signals. A demodulating receiver is provided for demodulating at least first and second beam-forming signals included within the first set of beam-forming signals, thereby producing first and second demodulated signals. The system further includes a tracking network for tracking multipath information signals, received from various positions and angles of incidence, based on comparison of the first and second demodulated signals.

公开(公告)号：ZA9600181B

公开(公告)日：1996-10-14

申请号：ZA9600181

申请日：1996-01-10

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 ,  H04B ,  H04L

CPC classification number: H04L1/0057 ,  H04B1/707 ,  H04B1/70757 ,  H04B1/7115 ,  H04B7/2618 ,  H04B7/2628 ,  H04B7/2637 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04J3/1688 ,  H04J3/22 ,  H04J13/0048 ,  H04J13/10 ,  H04J13/18 ,  H04L1/004 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0083 ,  H04L1/08 ,  H04L5/02 ,  H04L5/023 ,  H04W52/26

公开(公告)号：ZA961025B

公开(公告)日：1996-07-16

申请号：ZA961025

申请日：1996-02-08

Applicant: QUALCOMM INC

Inventor： ZEHAVI EPHRAIM ,  MILLER DAVID S ,  LAROCCA JUDITH

IPC: H04B7/216 ,  H04J11/00 ,  H04J13/00 ,  H04J13/16 ,  H04L1/00 ,  H04L7/02 ,  H04L9/22 ,  H04B ,  H04L ,  H04Q ,  H04J

Abstract: A variable rate transmission system where a packet of variable is transmitted on a traffic channel if the capacity of the traffic channel is greater than or equal to the data rate of the packet. When the rate of the packet of variable rate data exceeds the capacity of the traffic channel, the packet is transmitted on a traffic channel and at least one overflow channel. Also described is a receiving system for receiving and reassembling the data transmitted on the traffic channel and at least one additional overflow channels.

公开(公告)号：FI961344A

公开(公告)日：1996-05-22

申请号：FI961344

申请日：1996-03-22

Applicant: QUALCOMM INC

Inventor： KINDRED DANIEL R ,  BUTLER BRIAN K ,  ZEHAVI EPHRAIM ,  WOLF JACK K

IPC: H04L1/12 ,  H03M13/23 ,  H03M13/37 ,  H03M13/41 ,  H04B1/707 ,  H04L1/00 ,  H04L1/08 ,  H04L1/20 ,  H04L25/02 ,  H04L25/03 ,  H04L25/08 ,  H04L25/40 ,  H04L13/12

Abstract: A Viterbi decoder for recovering the original bit data stream that was convolutionally encoded as a code symbol stream in a Code Division Multiple Access (CDMA) mobile communication system. The decoder simultaneously decodes at the several data rates associated with certain multirate vocoders. The decoder can decode at an unknown data rate in either continuous or framed packet modes. It accomplishes this by simultaneously decoding at multiple rates and by creating one or more data quality metrics for each decoded data packet. Special input and output buffering is provided to isolate the decoder from system timing constraints. The input buffer includes selection and accumulation logic to organize code symbol data into the packet order for repeat mode or random burst mode at lower frame data rates. Decoded data packets for each of several predetermined data transfer rates are held in an output buffer for about half of the decoding cycle, thereby permitting the system microprocessor to examine and select the appropriate decoded data packet. The decoder also can be reconfigured to operate at any one of several predetermined convolutional encoding algorithms. The Viterbi decoder, implemented as a single monolithic integrated circuit, can be used in any and all of many different multiuser telecommunications channels.