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公开(公告)号：FI972501A
公开(公告)日：1997-08-15
申请号：FI972501
申请日：1997-06-12
Applicant: QUALCOMM INC
Inventor： WHEATLEY III CHARLES E , KORNFELD RICHARD K , PETERZELL PAUL E , WEILAND ANA L
IPC: H04B1/06 , H03G1/00 , H03G3/30 , H04B20060101 , H04B1/10 , H04B1/16 , H04B1/18 , H04B1/40 , H04B1/7075 , H04B1/7097 , H04B3/06 , H04B7/005 , H04B7/26 , H04B15/00 , H04B
Abstract: An apparatus to increase a radio receiver's immunity to radio frequency interference, the radio receiver receiving a signal, the apparatus comprising: a switch (1105) coupled to the received signal, the switch (1105) having an open position and a closed position; a resistance (1101), a first end of the resistance (1101) being coupled to the closed position of the switch (1105) and a second end of the resistance (1101) being coupled to a ground potential; an amplifier (1101) having an input coupled to the open position of the switch (1105), for generating an amplified received signal at an output; a controller coupled to the switch (1105), for switching the switch (1105) to the closed position in response to the received signal exceeding a predetermined power level, said received signal conducting through said switch (1105) and said resistance (1101) to ground potential when said switch (1105) is in said closed position; and said resistance (1101) creating an impedance mismatch at the input to said amplifier (1110) when said switch (1105) is in closed position, thereby reducing the gain contributed by said amplifier (1110).
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公开(公告)号：FI961414A0
公开(公告)日：1996-03-28
申请号：FI961414
申请日：1996-03-28
Applicant: QUALCOMM INC
Inventor： TIEDEMANN JR EDWARD G , GILHOUSEN KLEIN S , ODENWALDER JOSEPH P , ZEHAVI EPHRAIM , LEVIN JEFFREY A , WHEATLEY III CHARLES E
Abstract: A method and apparatus for controlling transmission power in a variable rate communication system is disclosed. The method disclosed provides for a closed loop power control method. A first remote station controls the transmission power of a second remote station by transmitting a rate dependent power control signal to the second remote communication station. Since only the second communication knows its transmission rate a priori, it must determine its course of action in accordance with both the received power control signal and the knowledge of its transmission rate.
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公开(公告)号：MY105491A
公开(公告)日：1994-10-31
申请号：MYPI19901938
申请日：1990-11-05
Applicant: QUALCOMM INC
Inventor： GILHOUSEN KLEIN S , WHEATLEY III CHARLES E , PADOVANI ROBERTO
Abstract: IN A CELLULAR TELEPHONE SYSTEM A SYSTEM FOR DIRECTING COMMUNICATIONS BETWEEN A MOBILE USER (18) AND CELL-SITES (12, 14, 16) AS A MOBILE USER (18) CHANGES CELL-SITE SERVICE AREAS. THE MOBILE USER (18) INCLUDES AN APPARATUS (40, 46) FOR, WHILE IN COMMUNICATION WITH ANOTHER SYSTEM USER VIA ONE CELL-SITE, DETERMINING A TRANSITION OF THE MOBILE USER (18) FROM THE CELL-SITE SERVICE AREA TO THE SERVICE AREA OF ANOTHER CELL-SITE. THE SYSTEM INCLUDES CIRCUITRY (78) RESPONSIVE TO THE INDICATION FOR COUPLING COMMUNICATIONS BETWEEN THE MOBILE USER AND THE OTHER SYSTEM USER VIA THE NEW CELL-SITE WHILE THE MOBILE USER ALSO REMAINS IN COMMUNICATION WITH THE SYSTEM USER VIA THE FIRST CELL-SITE. THE SYSTEM FURTHER INCLUDES APPARATUS (78) RESPONSIVE TO THE COUPLING OF THE COMMUNICATIONS BETWEEN THE MOBILE USER AND THE OTHER SYSTEM USER VIA THE NEW CELL-SITE FOR TERMINATING THE COMMUNICATIONS BETWEEN MOBILE USER AND ANOTHER SYSTEM USER VIA CELL SITE WITH COMMUNICATIONS CONTINUING BETWEEN THE MOBILE USER AND THE SYSTEM USER VIA THE CELL-SITE.(FIG. 1)
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公开(公告)号：MY104809A
公开(公告)日：1994-05-31
申请号：MYPI19901952
申请日：1990-11-06
Applicant: QUALCOMM INC
Inventor： WHEATLEY III CHARLES E , GILHOUSE KLEIN S , PADOVANI ROBERTO
Abstract: A SPREAD SPECTRUM RECEIVER SUBSYSTEM FOR UTILIZATION IN CDMA CELLULAR TELEPHONE HAVING A SEARCHER RECEIVER (44) FOR SCANNING THE TIME DOMAIN SO AS TO USE THE PN PROCESSING GAIN AND TIME DISCRIMINATION PROPERTIES OF SPREAD SPECTRUM CODING TO DETERMINE THE LOCATION IN THE TIME DOMAIN AND THE RECEIVED SIGNAL STRENGTH OF MULTIPLE RECEPTIONS OF A PILOT SIGNAL TRAVELING UPON ONE OR MORE PHYSICAL PROPAGATION PATHS TO RECEPTION. THE SEARCHER RECEIVER (44) PROVIDES A CONTROL SIGNAL INDICATIVE OF THE RECEIVED PILOT SIGNALS OF GREATEST STRENGTH AND CORRESPONDING TIME RELATIONSHIP. A DATA RECEIVER (40, 42) RECEIVES SPREAD SPECTRUM COMMUNICATION SIGNALS ACCOMPANYING EACH RECEIVED PILOT SIGNAL AND IS RESPONSIVE TO THE SEARCHER CONTROL SIGNAL FOR ACQUIRING AND DEMODULATING A SPREAD SPECTRUM COMMUNICATION SIGNAL, CONCOMITANT WITH THE PILOT SIGNAL OF GREATEST SIGNAL STRENGTH, AND THUS PROVIDING A CORRESPONDING ENCODED OUTPUT SIGNAL BEARING INFORMATION. (FIG. 2)
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25.发明专利
公开(公告)号：MY104785A
公开(公告)日：1994-05-31
申请号：MYPI19901953
申请日：1990-11-06
Applicant: QUALCOMM INC
Inventor： GILHOUSEN KLEIN S , WHEATLEY III CHARLES E , PADOVANI ROBERTO
IPC: H04L27/30 , H04B7/005 , H04B7/204 , H04B7/26 , H04J13/00 , H04W52/00 , H04W52/02 , H04W52/06 , H04W52/08 , H04W52/10 , H04W52/12 , H04W52/40 , H04W52/52
Abstract: A POWER CONTROL SYSTEM FOR A CELLULAR MOBILE TELEPHONE SYSTEM IN WHICH SYSTEM USERS (16, 18) COMMUNICATE INFORMATION SIGNALS BETWEEN ONE ANOTHER VIA AT LEAST ONE CELL SITE (12, 14) USING CODE DIVISION MULTIPLE ACCESS SPREAD SPECTRUM COMMUNICATION SIGNALS. THE POWER CONTROL SYSTEM CONTROLS TRANSMISSION SIGNAL POWER FOR EACH CELLULAR MOBILE TELEPHONE IN THE MOBILE TELEPHONE SYSTEM WHEREIN EACH CELLULAR MOBILE TELEPHONE HAS AN ANTENNA (70), TRANSMITTER (84) AND RECEIVER (72, 74) AND EACH CELL- SITE ALSO HAS AN ANTENNA (52), TRANSMITTER (62) AND RECEIVER (54, 56). CELL- SITE TRANSMITTED SIGNAL POWER IS MEASURED AS RECEIVED AT THE MOBILE UNIT. TRANSMITTER POWER IS ADJUSTED (76, 80) AT THE MOBILE UNIT IN AN OPPOSITE MANNER WITH RESPECT TO INCREASES AND DECREASES IN RECEIVED SIGNAL POWER. A POWER CONTROL FEEDBACK SCHEME MAY ALSO BE UTILIZED. AT THE CELL- SITE COMMUNICATING WITH THE MOBILE UNIT, THE MOBILE UNIT TRANSMITTED POWER IS MEASURED (60) AS RECEIVED AT THE CELL- SITE. A COMMAND SIGNAL IS GENERATED AT THE CELL- SITE AND TRANSMITTED TO THE MOBILE UNIT FOR FURTHER ADJUSTING MOBILE UNIT TRANSMITTER POWER CORRESPONDING TO DEVIATIONS IN THE CELL SITE RECEIVED SIGNAL POWER. THE FEEDBACK SCHEME IS USED TO FURTHER ADJUST THE MOBILE UNIT TRANSMITTER POWER SO THAT MOBILE UNIT TRANSMITTED SIGNALS ARRIVE AT THE CELL- SITE AT DESIRED POWER LEVEL. (FIG. 6)
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Patent Agency Ranking
公开(公告)号：NO925019L
公开(公告)日：1992-12-23
申请号：NO925019
申请日：1992-12-23
Applicant: QUALCOMM INC
Inventor： GILHOUSEN KLEIN S , JACOBS IRWIN M , PADOVANI ROBERTO , WEAVER JR LINDSAY A , 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：NO925019A
公开(公告)日：1992-12-23
申请号：NO925019
申请日：1992-12-23
Applicant: QUALCOMM INC
Inventor： GILHOUSEN KLEIN S , JACOBS IRWIN M , PADOVANI ROBERTO , WEAVER JR LINDSAY A , 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
CPC classification number: 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
Abstract: 1. A modulation system for use in spread spectrum communications, comprising: means for generating a first orthogonal sequence signal corresponding to a selected one of a plurality of orthogonal binary sequences; means for generating a pseudo-noise (PN) signal corresponding to a predetermined PN binary sequence; means for combining said first orthogonal sequence signal and said PN signal and for providing a resultant first modulation signal. 2. The system of 1 further comprising additional means for combining said first modulation signal with an input information signal and for providing a resultant spread spectrum information signal. 3. The system of 1 wherein said plurality of orthogonal binary sequences are Walsh sequences. 4. The system of 1 wherein said PN sequence is an augmented length maximal linear sequence PN code.
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公开(公告)号：NO20032576A
公开(公告)日：1992-12-23
申请号：NO20032576
申请日：2003-06-06
Applicant: QUALCOMM INC
Inventor： GILHOUSEN KLEIN S , JACOBS IRWIN M , PADOVANI ROBERTO , WEAVER JR LINDSAY A , WHEATLEY III CHARLES E , VITERBI ANDREW J
IPC: H04B1/7115 , H04B1/707
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公开(公告)号：NO921792L
公开(公告)日：1992-07-06
申请号：NO921792
申请日：1992-05-06
Applicant: QUALCOMM INC
Inventor： GILHOUSEN KLEIN S , PADOVANI ROBERTO , WHEATLEY III CHARLES E
IPC: H04B7/005 , H04B7/26 , H04W52/00 , H04W52/02 , H04W52/06 , H04W52/08 , H04W52/10 , H04W52/12 , H04W52/40 , H04W52/52 , H04L
Abstract: A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell site using code division multiple access spread spectrum communication signals. The power control system controls transmission signal power for each cellular mobile telephone in the cellular mobile telephone system wherein each cellular mobile telephone has an antenna, transmitter and receiver and each cell-site also has an antenna, transmitter and receiver. Cell-site transmitted signal power is measured as received at the mobile unit. Transmitter power is adjusted at the mobile unit in an opposite manner with respect to increases and decreases in received signal power. A power control feedback scheme may also be utilized. At the cell-site communicating with the mobile unit, the mobile unit transmitted power is measured as received at the cell-site. A command signal is generated at the cell-site and transmitted to the mobile unit for further adjusting mobile unit transmitter power corresponding to deviations in the cell site received signal power. The feedback scheme is used to further adjust the mobile unit transmitter power so as to arrive at the cell-site at a desired power level.
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公开(公告)号：NO921794D0
公开(公告)日：1992-05-06
申请号：NO921794
申请日：1992-05-06
Applicant: QUALCOMM INC
Inventor： GILHOUSEN KLEIN S , PADOVANI ROBERTO , WHEATLEY III CHARLES E
Abstract: A spread spectrum receiver subsystem for utilization in a CDMA cellular telephone having a searcher receiver for scanning the time domain so as to use the PN processing gain and time discrimination properties of spread spectrum coding to determine the location in the time domain and the received signal strength of multiple receptions of a pilot signal traveling upon one or more physical propagation paths to reception. The searcher receiver provides a control signal indicative of the received pilot signals of greatest strength and corresponding time relationship. A data receiver receives spread spectrum communication signals accompanying each received pilot signal and is responsive to the searcher control signal for acquiring and demodulating a spread spectrum communication signal, concomitant with the pilot signal of greatest signal strength, and thus providing a corresponding information bearing encoded output signal.
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