公开(公告)号：EP1518380A1

公开(公告)日：2005-03-30

申请号：EP03761152.2

申请日：2003-06-20

申请人： Disney Enterprises, Inc.

发明人： MCKNIGHT, Thomas, R. ,  HASELTINE, Eric ,  SCHELL, Jesse, N.

IPC分类号： H04L27/30 ,  H04L27/26

CPC分类号： H04L27/30 ,  H04L27/2601

摘要： A system and a method for the transmission and reception of digital data wirelessly using acoustic tones comprises a device having an encoder, a modulator system, a demodulator system, and a decoder. The modulator system uses a plurality of acoustical tones with a fundamental frequency and multiple harmonics that are amplitude modulated. The received signal is demodulated and detected by quadrature detectors comprising replicas of the acoustical tones. An extended Golay code based decoder is used for correcting errors occurring during transmission.

公开(公告)号：EP1450531A3

公开(公告)日：2005-01-26

申请号：EP04012940.5

申请日：1991-06-21

申请人： QUALCOMM INCORPORATED

发明人： Gilhousen, Klein S. c/o QUALCOMM INCORPORATED ,  Weaver, Lindsay A., Jr. c/o QUALCOMM INCORPORATED ,  Jacobs, Irwin M. c/o QUALCOMM INCORPORATED

IPC分类号： H04L27/30 ,  H04B7/26 ,  H04J13/00

CPC分类号： H04L1/0002 ,  H04B1/3888 ,  H04B1/707 ,  H04B1/70757 ,  H04B1/709 ,  H04B1/7115 ,  H04B7/2618 ,  H04B7/2628 ,  H04B7/2637 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04J13/0022 ,  H04J13/0048 ,  H04J13/10 ,  H04J13/107 ,  H04J13/18 ,  H04L1/0006 ,  H04L1/0046 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/06 ,  H04L1/08 ,  H04L5/02 ,  H04L5/12 ,  H04L23/02 ,  H04W52/26 ,  Y02D50/10

摘要： A cell site, comprising: means for modulating configured to format digital data for transmission on a communications channel and to insert at least one timing command into the digital data, the digital data comprising a plurality of bits; means for transmitting coupled to the means for modulating and configured to receive the digital data from the means for modulating, convert the digital data to analog data, and transmit the analog data on the communications channel; and means for receiving configured to receive a signal from at least one remote unit and to determine a timing error of the received signal to be used to generate the timing command in accordance with the timing error, the means for receiving being coupled to the means for modulating and configured to provide the timing command to the means for modulating.

公开(公告)号：EP0866588B1

公开(公告)日：2004-12-01

申请号：EP98103451.5

申请日：1998-02-26

申请人： HARRIS CORPORATION

发明人： Snell, James Leroy

IPC分类号： H04L27/30 ,  H04B1/707 ,  H04L12/28

CPC分类号： H04J13/0048 ,  H04B1/707 ,  H04J13/12 ,  H04L27/18

摘要： A method of generating an rf signal for transmitting binary information in a packet format including a header field followed by a data field. The method comprises the steps of: spread spectrum encoding a sequence of first data symbols from said binary information within said header field by combining said first data symbols with a spreading sequence generated at a predetermined chip rate; encoding a sequence of N-bit second data symbols, where N is greater than 1, from said binary information within said data field by generating for each of said N-bit second data symbols one of a set of 2 chip sequences generated at the same chip rate as said spreading sequence: and applying the spread-spectrum encoded symbols of said header field and the selected chip sequences of said data field to the I and Q inputs of a phase shift modulator to produce said rf signal.

公开(公告)号：EP0875094A4

公开(公告)日：2004-05-19

申请号：EP96944303

申请日：1996-12-13

申请人： MOTOROLA INC

发明人： GAILUS PAUL H ,  MCCALLUM KEVIN J

IPC分类号： H03B21/00 ,  H03D7/16 ,  H04B1/04 ,  H04B1/02 ,  G06F7/44 ,  H03B19/00 ,  H04B1/28 ,  H04L27/30

CPC分类号： H03D7/165 ,  H03B21/00 ,  H04B1/04 ,  H04B2001/0491

摘要： An apparatus comprises a current generator (101) having an output. A plurality of mixers (103, 105, and 107) is switchably coupled to the current generator output, such that a first average power output level is provided when a first mixer (103) of the plurality of mixers is engaged and a second average power output level is provided when a second mixer (105) of the plurality of mixers is engaged. The first average power output level and the second average power output level are different.

公开(公告)号：EP1386462A1

公开(公告)日：2004-02-04

申请号：EP02728681.4

申请日：2002-04-05

申请人： INTERDIGITAL TECHNOLOGY CORPORATION

发明人： HEPLER, Edward, L.

IPC分类号： H04L27/30

CPC分类号： G06F1/0255 ,  H04J13/0044 ,  H04J13/12

摘要： A system for generating pseudorandom codes using a register (20) which contains an identification of the code tree leg of the desired code and a counter (12) which outputs a successive binary sequence. The output from the counter (12) is bit-by-bit ANDed (18) with the output of the register (20), and those outputs are XORed (22) together to output a single bit. As the counter (12) is sequenced, each count results in a different bit that is output from the XOR gate (22), resulting in the desired code.

公开(公告)号：EP1374462A1

公开(公告)日：2004-01-02

申请号：EP02753756.2

申请日：2002-02-20

申请人： MOTOROLA, INC.

发明人： GLEESON, John, K.

IPC分类号： H04J4/00 ,  H04L27/30

CPC分类号： H04W88/02 ,  H04W52/283 ,  H04W52/288 ,  H04W72/02

摘要： A communication device (12) transmits a communication signal during repetitive time slots. The communication device (12) includes a duty-cycle adjustment signal generator (82) that generates an adjustment signal based on a proximity signal. A controller (54) in response to the proximity signal, adjusts a transmission duty cycle relating to the repetitive time slots for transmitting a communication signal during a time slot. The communication signal is then radiated via an antenna (70).

公开(公告)号：EP1354433A1

公开(公告)日：2003-10-22

申请号：EP01992407.5

申请日：2001-12-21

申请人： Wiscom Technologies, Inc.

发明人： QIU, Robert, C.

IPC分类号： H04B15/00 ,  H04K1/00 ,  H04L27/30

CPC分类号： H04W52/325 ,  H04W52/16 ,  H04W52/288 ,  H04W52/50

摘要： The present invention is a method (figure 1) and system to determine the gain factors for the uplink and downlink Dedicated Physical Control Channel (DPCC) and Dedicated Physical Data Channel (DPDC). The method consists of determining new data rate (104) for transmission; providing corresponding system and radio channel parameters (106); determining reference power ratio P1 (108); and, normalizing the reference power ratio (110).

公开(公告)号：EP1135911B1

公开(公告)日：2003-09-24

申请号：EP99961643.6

申请日：1999-11-10

申请人： MOTOROLA, INC.

发明人： JALLOUL, Louay ,  YOUSEF, Nabil

IPC分类号： H04L27/30 ,  H04B1/707

CPC分类号： H04B1/7113

公开(公告)号：EP1027779A4

公开(公告)日：2003-09-03

申请号：EP98922487

申请日：1998-05-22

申请人： MOTOROLA INC

发明人： KELTON JAMES ROBERT ,  WHINNETT NICHOLAS WILLIAM ,  FRANK COLIN D

IPC分类号： H04L27/18 ,  H04B1/707 ,  H04B7/26 ,  H04L27/20 ,  H04B15/00 ,  H04B7/216 ,  H04K1/00 ,  H04L27/30

CPC分类号： H04L27/2042 ,  H04B1/707

摘要： A transmitter for a communication system transmits consecutive chips of a signal shifted in phase +/- 90 degrees +/- an angle between 0 degrees and 45 degrees which is a function of a spreading gain.

公开(公告)号：EP1236327A4

公开(公告)日：2003-07-23

申请号：EP00984053

申请日：2000-12-08

申请人： TIME DOMAIN CORP

发明人： FULLERTON LARRY W ,  COWIE IVAN A ,  RICHARD JAMES L ,  BRETHOUR VERNON R

IPC分类号： H04L27/20 ,  H04B1/7095 ,  H04B1/7176 ,  H04B1/7183 ,  H04L25/49 ,  H04L27/22 ,  H04L27/30 ,  H04B1/69

CPC分类号： H04B1/7176 ,  H04B1/7095 ,  H04B1/7183 ,  H04L25/4902

摘要： A method for communicating information is using ultra wideband impulse radio transmitter and receiver. The method includes the steps of generating and transmitting a series of time-modulated pulse outputted from I and J channels, each pulse delayed by of four pre-determined time delay periods corresponding to points (M1, M2, M3, or M4) and representative of at least two data bits of information, and receiving and demodulating the series of time-modulated pulses (I, J) to estimate the data bits associated with each pulse.