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公开(公告)号:ZA931077B
公开(公告)日:1994-01-04
申请号:ZA931077
申请日:1993-02-16
Applicant: QUALCOMM INC
Inventor: PADOVANI ROBERTO , TIEDEMANN EDWARD G JR , WEAVER LINDSAY A JR
IPC: H04B1/707 , H04B1/7103 , H04B7/26 , H04J13/00 , H04J13/10 , H04J13/16 , H04L1/16 , H04L12/28 , H04L12/403 , H04L12/413 , H04L27/30 , H04W28/04 , H04W52/48 , H04W52/50 , H04W74/00 , H04W74/08 , H04L
Abstract: Collisions between messages simultaneously transmitted by multiple spread spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station uses one or more randomization methods to distribute its transmissions. Each mobile station includes a microprocessor (100); an encoder (140); a timing generator (136); a PN long code sequence generator (146); and XOR gate (152). The system is used in a CDMA mobile telephone system.
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公开(公告)号:ZA9301406B
公开(公告)日:1994-01-04
申请号:ZA9301406
申请日:1993-02-26
Applicant: QUALCOMM INC
Inventor: TIEDEMANN EDWARD G JR , WEAVER LINDSAY A JR , KERR RICHARD J , GEIB KENNETH M
IPC: H04J3/16 , H04B1/16 , H04B7/26 , H04W24/00 , H04W48/08 , H04W52/02 , H04W56/00 , H04W72/04 , H04W72/12 , H04W74/04 , H04J
CPC classification number: H04B1/1615 , H04B2201/70709 , H04W24/00 , H04W52/0216 , H04W52/0219 , H04W56/00 , H04W68/02 , H04W72/04 , H04W72/0413 , H04W72/12 , H04W74/04 , Y02D70/1222 , Y02D70/164 , Y02D70/26 , Y02D70/40
Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include reacquiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.
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公开(公告)号:ZA9301077B
公开(公告)日:1994-01-04
申请号:ZA9301077
申请日:1993-02-16
Applicant: QUALCOMM INC
Inventor: TIEDEMANN EDWARD G JR , WEAVER LINDSAY A JR , PADOVANI ROBERTO
IPC: H04B1/707 , H04B1/7103 , H04B7/26 , H04J13/00 , H04J13/10 , H04J13/16 , H04L1/16 , H04L12/28 , H04L12/403 , H04L12/413 , H04L27/30 , H04W28/04 , H04W52/48 , H04W52/50 , H04W74/00 , H04W74/08 , H04L
CPC classification number: H04W74/0841 , H04B1/707 , H04B1/7103 , H04B7/2628 , H04B2201/709709 , H04J13/0022 , H04J13/10 , H04J13/16 , H04L1/188 , H04L1/1887 , H04W52/48 , H04W52/50 , H04W74/002 , H04W74/08 , H04W74/0833 , H04W74/0866
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公开(公告)号:ZA93290B
公开(公告)日:1993-11-22
申请号:ZA93290
申请日:1993-01-15
Applicant: QUALCOMM INC
Inventor: PADOVANI ROBERT , TIEDEMANN EDWARD G JR , WEAVER LINDSAY A JR , BUTLER BRIAN K
IPC: C02F5/10 , H04L27/20 , C08L33/02 , C08L35/00 , C08L51/02 , C08L77/04 , C11D3/37 , H04B7/00 , H04J3/16 , H04J3/22 , H04J3/24 , H04J11/00 , H04J13/00 , H04J13/18 , H04L20060101 , H04L1/00 , H04L1/08 , H04L12/00 , H04L27/30 , H04L29/06 , H04Q7/38 , H04L
Abstract: The invention relates to a communication system in which transmission takes place according to a format which permits different types of data to be combined and transmitted within a single transmission. The novel feature is that the communication system transmits variable length frames of data in packets, and that a data combining and transmission sub-system (14, 16, 18, 20) is provided so that when a frame of data does not require a complete packet for transmission, the data combining sub-system combines the frame of data with additional data to provide a complete packet. The data combining sub-system comprises input means for receiving the frame of data and the additional data and for combining the frame of data and the additional data to provide a complete packet responsive to a control signal, and control means for providing the control signal.
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公开(公告)号:CA2130667A1
公开(公告)日:1993-09-06
申请号:CA2130667
申请日:1993-03-04
Applicant: QUALCOMM INC
Inventor: TIEDEMANN EDWARD G JR , WEAVER LINDSAY A JR , PADOVANI ROBERTO
IPC: H04B1/707 , H04B1/7103 , H04B7/26 , H04J13/00 , H04J13/10 , H04J13/16 , H04L1/16 , H04L12/28 , H04L12/403 , H04L12/413 , H04L27/30 , H04W28/04 , H04W52/48 , H04W52/50 , H04W74/00 , H04W74/08
Abstract: Collisions between messages simultaneously transmitted by multiple spread spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station uses one or more randomization methods to distribute its transmissions. Each mobile station includes a microprocessor (100); an encoder (140); a timing generator (136); a PN long code sequence generator (146); and XOR gate (152). The system is used in a CDMA mobile telephone system.
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公开(公告)号:AU3476793A
公开(公告)日:1993-08-03
申请号:AU3476793
申请日:1993-01-19
Applicant: QUALCOMM INC
Inventor: PADOVANI ROBERTO , TIEDEMANN EDWARD G JR , WEAVER LINDSAY A JR , BUTLER BRIAN K
IPC: H04L27/20 , C02F5/10 , C08L33/02 , C08L35/00 , C08L51/02 , C08L77/04 , C11D3/37 , H04B7/00 , H04J3/16 , H04J3/22 , H04J3/24 , H04J11/00 , H04J13/00 , H04J13/18 , H04L20060101 , H04L1/00 , H04L1/08 , H04L12/00 , H04L27/30 , H04L29/06 , H04Q7/38
Abstract: The invention relates to a communication system in which transmission takes place according to a format which permits different types of data to be combined and transmitted within a single transmission. The novel feature is that the communication system transmits variable length frames of data in packets, and that a data combining and transmission sub-system (14, 16, 18, 20) is provided so that when a frame of data does not require a complete packet for transmission, the data combining sub-system combines the frame of data with additional data to provide a complete packet. The data combining sub-system comprises input means for receiving the frame of data and the additional data and for combining the frame of data and the additional data to provide a complete packet responsive to a control signal, and control means for providing the control signal.
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公开(公告)号:AU624120B2
公开(公告)日:1992-06-04
申请号:AU3059788
申请日:1988-12-21
Applicant: QUALCOMM INC
Inventor: GILHOUSEN KLEIN S , ANTONIO FRANKLIN P , JACOBS IRWIN M , WEAVER LINDSAY A JR
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公开(公告)号:CA2073053A1
公开(公告)日:1991-06-06
申请号:CA2073053
申请日:1990-11-30
Applicant: QUALCOMM INC
Inventor: AMES WILLIAM G , JACOBS IRWIN M , WEAVER LINDSAY A JR , GILHOUSEN KLEIN S
IPC: G01S5/12 , G01S5/14 , G01S13/87 , G01S19/00 , G01S19/01 , G01S19/38 , G01S19/48 , H04B7/185 , G01S5/10
Abstract: A method and system for determining the position of an object using a fixed station and a plurality of earth orbit satellites whose positions are known. Separate periodic signals are transmitted from the fixed station via first and second satellites to the object whose postion is to be determined. The phase offset in periodic characteristics of the periodic signals as received from the first and second satellites is measured at the object. The phase offset corresponds to a relative time difference in propagation of the signals traveling two different paths to the object. The object transmits via the first satellite a return signal indicative of the measured relative time difference. This return signal is activated some time in the future according to the object local time, which is slaved to receipt of the periodic signal sent through the first satellite. This future time is the start of the particular time period as decided by the fixed station's schedule. At the fixed station, an instantaneous round trip delay, determined by the time offset of the current transmission clock time relative to the receive clock time of reception of the return signal, along with the measured relative time difference sent back on the return signal, is used to calculate the distances between the first and second satellites to the object. From these distances the position of the object is calculated.
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公开(公告)号:FI120281B
公开(公告)日:2009-08-31
申请号:FI20030823
申请日:2003-06-02
Applicant: QUALCOMM INC
Inventor: GILHOUSEN KLEIN S , JACOBS IRWIN M , PADOVANI ROBERTO , WEAVER LINDSAY A JR , WHEATLEY III CHARLES E , VITERBI ANDREW J
IPC: H04B1/707 , H04B1/7075 , H04B1/709 , H04B1/7115 , H04B7/005 , H04B7/26 , H04J3/02 , H04J3/16 , H04J3/22 , H04J11/00 , H04J13/00 , H04J13/10 , H04J13/18 , H04L20060101 , H04L1/00 , H04L1/06 , H04L1/08 , H04L5/02 , H04L5/12 , H04L23/02 , H04L27/30 , H04W52/26
Abstract: 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.
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公开(公告)号:AT434869T
公开(公告)日:2009-07-15
申请号:AT00125802
申请日:1992-05-17
Applicant: QUALCOMM INC
Inventor: GILHOUSEN KLEIN S , PADOVANI ROBERTO , WHEATLEY CHARLES E , WEAVER LINDSAY A JR , BLAKENEY ROBERT D
IPC: H04B7/005 , H04J13/00 , H04B7/26 , H04L27/30 , H04W52/00 , H04W52/02 , H04W52/06 , H04W52/08 , H04W52/10 , H04W52/12 , H04W52/34 , H04W52/36 , H04W52/40 , H04W52/52
Abstract: A cellular communication system in which a system user and another user communicate with each other by way of information carrying spread spectrum modulated signals transmitted via a cell-site in which system: the system user comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said cell-site, a receiver for receiving information carrying spread spectrum modulated signals from said cell-site and means for measuring signal quality in said information carrying spread spectrum modulated signals received by the system user; the cell-site comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said system user, a receiver for receiving information carrying spread spectrum modulated signals from said system user and adjusting means for adjusting the power of information carrying spread spectrum modulated signals transmitted from the cell-site ; ; and power control means is provided for controlling the transmission power of the information carrying spread spectrum modulated signals by measuring the signal power in the information carrying spread spectrum modulated signals received by the system user and transmitting data representing the measured power to the cell-site by way of the information carrying spread spectrum modulated signals, the adjusting means being responsive to the data in the information carrying spread spectrum modulated signals from the system user to adjust the power in the information carrying spread spectrum modulated signals transmitted by the cell-site.
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