公开(公告)号：AU2002365351A8

公开(公告)日：2003-06-10

申请号：AU2002365351

申请日：2002-11-20

Applicant: QUALCOMM INC

Inventor： CORBATON IVAN JESUS FERNANDEZ ,  JALALI AHMAD

IPC: H04J11/00 ,  H04L1/00 ,  H04L1/18 ,  H04L27/26 ,  H04L29/08

公开(公告)号：AU2002346470A1

公开(公告)日：2003-06-10

申请号：AU2002346470

申请日：2002-11-20

Applicant: QUALCOMM INC

Inventor： KADOUS TAMER ,  JALALI AHMAD ,  CORBATON IVAN JESUS FERNANDEZ

IPC: H04L1/00 ,  H04L27/26

公开(公告)号：BR0013670A

公开(公告)日：2002-12-03

申请号：BR0013670

申请日：2000-08-31

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD

IPC: H04B7/26 ,  H04B7/06

Abstract: In a CDMA data communication system capable of variable rate transmission, utilization of beamforming techniques decreases the average interference caused by transmissions of a base station (104) to subscriber stations (112) in neighboring cells (124). Base stations (102, 104) utilize multiple transmit antennas (106, 108), each transmitting signals at controlled phases, to form transmit signal beams (110, 118, 122) corresponding to individual subscriber stations (112, 116, 114). Data and reference signals are transmitted along beams (110, 118, 122) that change according to fixed time slots and subslots in order to maximize carrier-to-interference ratios (C/I) measured at subscriber stations (112, 116, 114).

公开(公告)号：NO20024910D0

公开(公告)日：2002-10-11

申请号：NO20024910

申请日：2002-10-11

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD ,  ESTEVES EDUARDO A S ,  SINDHUSHAYANA NAGABHUSHANA T ,  BLACK PETER J ,  ATTAR RASHID A

IPC: H04L1/16 ,  H04L1/18 ,  H04Q7/38 ,  H04L

Abstract: A method for wireless communication, comprising: receiving data in multiple forward link timeslots; determining a quality metric of the received data; requesting retransmission of the data via a first request scheme if the quality metric indicates the data has not been received correctly; and if retransmission is requested and the data is not received correctly, requesting retransmission of the data via a second request scheme.

公开(公告)号：NO20024507D0

公开(公告)日：2002-09-20

申请号：NO20024507

申请日：2002-09-20

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK S ,  JALALI AHMAD

IPC: H04J11/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/12 ,  H04B7/26 ,  H04J99/00 ,  H04L25/02 ,  H04L27/26 ,  H04Q7/38 ,  H04B

Abstract: Transmitter and receiver units for use in a communications system and configurable to provide antenna, frequency, or temporal diversity, or a combination thereof, for transmitted signals. The transmitter unit includes a system data processor, one or more modulators, and one or more antennas. The system data processor receives and partitions an input data stream into a number of channel data streams and further processes the channel data streams to generate one or more modulation symbol vector streams. Each modulation symbol vector stream includes a sequence of modulation symbol vectors representative of data in one or more channel data streams. Each modulator receives and modulates a respective modulation symbol vector stream to provide an RF modulated signal, and each antenna receives and transmits a respective RF modulated signal. Each modulator may include an inverse (fast) Fourier transform (IFFT) and a cyclic prefix generator. The IFFT generates time-domain representations of the modulation symbol vectors, and the cyclic prefix generator repeats a portion of the time-domain representation of each modulation symbol vector. The channel data streams are modulated using multi-carrier modulation, e.g., OFDM modulation. Time division multiplexing (TDM) may also be used to increase flexibility.

公开(公告)号：AU7598801A

公开(公告)日：2002-02-05

申请号：AU7598801

申请日：2001-07-17

Applicant: QUALCOMM INC

Inventor： SMEE JOHN E ,  JALALI AHMAD

IPC: H04B1/7115 ,  H04B3/06 ,  H04B7/005 ,  H04B7/08 ,  H04L25/03 ,  H04B1/707

Abstract: In a method for achieving higher S/N, one or more signals are received and processed to provide one or more streams of samples. In a first processing scheme, the sample stream(s) are equalized and combined within an equalizer to generate symbol estimates, which maybe subsequently processed (e.g. despread and decovered) to provide a first stream of recovered symbols. The sample stream(s) may be equalized prior to being combined. In this case, each sample stream is filtered with a set of coefficients and may be scaled with a scaling factor. The scaled samples for all streams are then combined to generate the symbol estimates. Alternatively, the sample stream(s) may be combined prior to being equalized. In this case, each sample stream is scaled by a scaling factor. The scaled samples for all streams are then combined to generate summed samples that are further filtered with a set of coefficients to generate the symbol estimates. The sample stream(s) may also be processed by a second processing scheme with one or more rake receivers to provide a second stream of recovered symbols. The signal quality for each processing scheme can be estimated and used to select either the first or second processing scheme.

公开(公告)号：AU4934401A

公开(公告)日：2001-10-03

申请号：AU4934401

申请日：2001-03-20

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK ,  JALALI AHMAD

IPC: H04J11/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/12 ,  H04B7/26 ,  H04J99/00 ,  H04L25/02 ,  H04L27/26 ,  H04Q7/38

Abstract: Transmitter and receiver units for use in a communications system and configurable to provide antenna, frequency, or temporal diversity, or a combination thereof, for transmitted signals. The transmitter unit includes a system data processor, one or more modulators, and one or more antennas. The system data processor receives and partitions an input data stream into a number of channel data streams and further processes the channel data streams to generate one or more modulation symbol vector streams. Each modulation symbol vector stream includes a sequence of modulation symbol vectors representative of data in one or more channel data streams. Each modulator receives and modulates a respective modulation symbol vector stream to provide an RF modulated signal, and each antenna receives and transmits a respective RF modulated signal. Each modulator may include an inverse (fast) Fourier transform (IFFT) and a cyclic prefix generator. The IFFT generates time-domain representations of the modulation symbol vectors, and the cyclic prefix generator repeats a portion of the time-domain representation of each modulation symbol vector. The channel data streams are modulated using multi-carrier modulation, e.g., OFDM modulation. Time division multiplexing (TDM) may also be used to increase flexibility.

公开(公告)号：CA2402011A1

公开(公告)日：2001-09-27

申请号：CA2402011

申请日：2001-03-20

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK ,  JALALI AHMAD

IPC: H04J11/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/12 ,  H04B7/26 ,  H04J99/00 ,  H04L25/02 ,  H04L27/26 ,  H04Q7/38

Abstract: Transmitter and receiver units for use in a communications system and configurable to provide antenna, frequency, or temporal diversity, or a combination thereof, for transmitted signals. The transmitter unit includes a system data processor, one or more modulators, and one or more antennas. The system data processor receives and partitions an input data stream into a number of channel data streams and further processes the channel data streams to generate one or more modulation symbol vector streams. Each modulation symbol vector stream includes a sequence of modulation symbol vectors representative of data in one or more channel data streams. Each modulator receives and modulates a respective modulation symbol vector stream to provide an RF modulated signal, and each antenna receives and transmits a respective RF modulated signal. Each modulator may include an inverse (fast) Fourier transform (IFFT) and a cyclic prefix generator. The IFFT generates time-domain representations of the modulation symbol vectors, and the cyclic prefix generator repeats a portion of the time-domain representation of each modulation symbol vector. The channel data streams are modulated using multi-carrier modulation, e.g., OFDM modulation. Time division multiplexing (TDM) may also be used to increase flexibility.

公开(公告)号：EP1654688A4

公开(公告)日：2011-10-19

申请号：EP04786093

申请日：2004-07-21

Applicant: QUALCOMM INC

Inventor： STEENSTRA JACK ,  GANTMAN ALEXANDER ,  NOERENBERG JOHN W II ,  JALALI AHMAD ,  ROSE GREGORY G

IPC: G06K1/00 ,  G06K20060101 ,  G07F7/10 ,  H04L9/32

CPC classification number: G06Q20/341 ,  G06Q20/346 ,  G06Q20/4014 ,  G06Q20/40975 ,  G07F7/1008 ,  G07F7/1016 ,  G07F7/1025 ,  H04L9/3228 ,  H04L9/3297

公开(公告)号：EP1527539A4

公开(公告)日：2005-11-09

申请号：EP03742418

申请日：2003-07-01

Applicant: QUALCOMM INC

Inventor： STEENTRA JACK ,  JALALI AHMAD

IPC: H04B11/00 ,  H04L9/32 ,  H04L27/26 ,  H04K1/10

CPC classification number: H04L27/2602 ,  H04L27/2626 ,  H04L27/2647

Abstract: An apparatus and method for communication using sound waves is disclosed. More particularly, orthogonal frequency division multiplexing scheme is used to transmit (600) and receive (700) digital data on sound waves. In one embodiment, the sound waves are used to exchange information. In another aspect, the sound waves are used to authenticate an individual or device.

Abstract translation: 公开了一种使用声波进行通信的设备和方法。 更具体地说，正交频分复用方案被用于在声波上传输（600）和接收（700）数字数据。 在一个实施例中，声波用于交换信息。 另一方面，声波用于认证个人或设备。