公开(公告)号：DK0500761T3

公开(公告)日：1998-09-23

申请号：DK90917730

申请日：1990-11-05

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  PADOVANI ROBERTO ,  WHEATLEY CHARLES E III

IPC: H04B1/7115 ,  H04B1/712 ,  H04B7/08 ,  H04B7/26 ,  H04L1/06 ,  H04Q7/30 ,  H04L27/30

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.

公开(公告)号：AU694460B2

公开(公告)日：1998-07-23

申请号：AU8096894

申请日：1994-10-28

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  PADOVANI ROBERTO

IPC: H04W52/40 ,  H04B7/005 ,  H04B7/04 ,  H04W16/24 ,  H04W36/06 ,  H04W36/18 ,  H04W36/20 ,  H04W52/24 ,  H04W52/34 ,  H04Q7/38

Abstract: A method for achieving the soft or softer handoff process such that the performance of a system is improved is based on delaying the softer handoff process. Reverse link demodulation in each sector may continue with or without the transmission of the forward link. The operation could be based on the signal strength of the reverse link signal or the forward link. It is also possible to combine two or more methods to create a hybrid symbol.

公开(公告)号：ZA98700B

公开(公告)日：1998-07-22

申请号：ZA98700

申请日：1998-01-28

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  QUICK ROY F

IPC: H04W36/18 ,  H04B7/26 ,  H04W48/20 ,  H04Q ,  H04L

Abstract: A method and apparatus for providing soft handoff in a mobile communication system. In current systems is that the members of active set are determined in accordance with comparisons of measured pilot energy with fixed thresholds. However, the value of providing a redundant communication link to a mobile station depends strongly on the energy of other signals being provided to the mobile station. In the present invention, the signal strengths of other base stations in communication with a mobile station are considered when determining whether adding a base to that set of base stations in communication with the remote station is of sufficient value to justify the impact on system capacity.

公开(公告)号：GR3026464T3

公开(公告)日：1998-06-30

申请号：GR980400648

申请日：1998-03-27

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  PADOVANI ROBERTO ,  WHEATLEY CHARLES E III

IPC: H04B1/7115 ,  H04B1/712 ,  H04B7/08 ,  H04B7/26 ,  H04L1/06 ,  H04Q7/30 ,  H04L27/30

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.

公开(公告)号：DE69409368D1

公开(公告)日：1998-05-07

申请号：DE69409368

申请日：1994-02-01

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  ZIV NOAM

IPC: H04B1/40 ,  H04B7/005 ,  H04B7/26 ,  H04J13/00 ,  H04L1/00 ,  H04L1/08 ,  H04L25/02

Abstract: In a communication system in which direct sequence spread spectrum modulation techniques are used interference is generated in communications by remote stations since the communications share the same frequency spectrum. In order to increase system capacity the power level of the remote station transmitters are controlled by the local station. A setpoint is generated by the local station and compared with the remote station signal strength measured at the local station. The result of this comparison is used to generate power level adjustment commands which are sent to the remote station. The remote station is responsive to the power level adjustment commands for increasing or decreasing remote station transmitter power. In a spread spectrum communication system in which data is encoded at variable data rates, the local station determines the rate at which received data was encoded by the transmitting remote station. The data is decoded at each possible rate with error metrics generated that are representative of the quality of the data decoded at each rate. A rate decision algorithm is used to evaluate the error metrics and make a decision on the rate at which the data was transmitted. A pattern match of rate decisions is used to modify a setpoint so as to closely control the transmitting power of the remote station as a function of the quality of the received data.

公开(公告)号：SG48219A1

公开(公告)日：1998-04-17

申请号：SG1996008041

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：SG48018A1

公开(公告)日：1998-04-17

申请号：SG1996006209

申请日：1992-05-17

Applicant: QUALCOMM INC

Inventor： WHEATLEY CHARLES E III ,  GILHOUSEN KLEIN S ,  WEAVER LINDSAY A JR ,  BLAKENEY ROBERT D II ,  PADOVANI ROBERTO

IPC: H04J13/00 ,  H04B7/005 ,  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.

公开(公告)号：HU214413B

公开(公告)日：1998-03-30

申请号：HU9402518

申请日：1993-03-04

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  TIEDEMANN EDWARD G ,  WEAVER LINDSAY A

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.

公开(公告)号：DE69032044D1

公开(公告)日：1998-03-19

申请号：DE69032044

申请日：1990-11-05

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN ,  PADOVANI ROBERTO ,  WHEATLEY CHARLES

IPC: H04B1/7115 ,  H04B1/712 ,  H04B7/08 ,  H04B7/26 ,  H04L1/06 ,  H04Q7/30 ,  H04L27/30

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.

公开(公告)号：DE69313098T2

公开(公告)日：1998-03-12

申请号：DE69313098

申请日：1993-01-19

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  TIEDEMANN EDWARD ,  WEAVER LINDSAY ,  BUTLER BRIAN

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

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.