Irwin M Jacobs

US Patent:

6618429, Sep 9, 2003

Filed:

Oct 2, 2002

Appl. No.:

10/263898

Inventors:

Klein S. Gilhousen - Bozeman MT
Irwin M. Jacobs - La Jolla CA
Roberto Padovani - San Diego CA
Andrew J. Viterbi - La Jolla CA

Assignee:

Oualcomm Incorporated - San Diego CA

International Classification:

H04B 169

US Classification:

375141, 375140

Abstract:

A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, sync, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, encoded, interleaved, bi-phase shift key (BPSK) modulated with orthogonal covering of each BPSK symbol along with quadrature phase shift key (QPSK) spreading of the covered symbols. In the mobile-to-cell link, access and voice channels are defined.

US Patent:

6693951, Feb 17, 2004

Filed:

Jul 23, 1999

Appl. No.:

09/360059

Inventors:

Klein S. Gilhousen - Bozeman MT
Irwin M. Jacobs - La Jolla CA
Roberto Padovani - San Diego CA
Andrew J. Viterbi - La Jolla CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04B 169

US Classification:

375130

Abstract:

A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned; with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, sync, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, encoded, interleaved, bi-phase shift key (BPSK) modulated with orthogonal covering of each BPSK symbol along with quadrature phase shift key (QPSK) spreading of the covered symbols. In the mobile-to-cell link, access and voice channels are defined.

US Patent:

7003021, Feb 21, 2006

Filed:

Feb 5, 2004

Appl. No.:

10/772490

Inventors:

Klein S. Gilhousen - Bozeman MT, US
Irwin M. Jacobs - La Jolla CA, US
Roberto Padovani - San Diego CA, US
Andrew J. Viterbi - La Jolla CA, US

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04B 1/69

US Classification:

375150, 375130

Abstract:

A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, sync, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, encoded, interleaved, bi-phase shift key (BPSK) modulated with orthogonal covering of each BPSK symbol along with quadrature phase shift key (QPSK) spreading of the covered symbols. In the mobile-to-cell link, access and voice channels are defined.

US Patent:

7839960, Nov 23, 2010

Filed:

Dec 7, 2005

Appl. No.:

11/297264

Inventors:

Klein S. Gilhousen - Bozeman MT, US
Irwin M. Jacobs - La Jolla CA, US
Roberto Padovani - San Diego CA, US
Andrew J. Viterbi - La Jolla CA, US

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04L 7/00
H04B 1/69

US Classification:

375354, 375130

Abstract:

A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the exemplary embodiment, transmit power of mobile unit signals is controlled based on signal power received by the mobile unit and power adjustment commands sent to the mobile unit.

US Patent:

51034590, Apr 7, 1992

Filed:

Jun 25, 1990

Appl. No.:

7/543496

Inventors:

Klein S. Gilhousen - San Diego CA
Irwin M. Jacobs - La Jolla CA
Roberto Padovani - San Diego CA
Lindsay A. Weaver - San Diego CA
Charles E. Wheatley - Del Mar CA
Andrew J. Viterbi - La Jolla CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04L 2730

US Classification:

375 1

Abstract:

A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, sync, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, encoded, interleaved, bi-phase shift key (BPSK) modulated with orthogonal covering of each BPSK symbol along with quadrature phase shift key (QPSK) spreading of the covered symbols. In the mobile-to-cell link, access and voice channels are defined.

US Patent:

51267489, Jun 30, 1992

Filed:

May 20, 1991

Appl. No.:

7/702900

Inventors:

William G. Ames - Poway CA
Irwin M. Jacobs - La Jolla CA
Lindsay A. Weaver - San Diego CA
Klein S. Gilhousen - San Diego CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04B 7185
G01S 502
G01S 302

US Classification:

342353

Abstract:

A system and method for determining the position of an airborne object, using a fixed station and a pair of earth orbit satellites whose positions are known. Separate periodic signals are transmitted from the fixed station via the first and second satellites to the object whose position 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 realtive 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.

US Patent:

50179268, May 21, 1991

Filed:

Dec 5, 1989

Appl. No.:

7/446979

Inventors:

William G. Ames - Poway CA
Irwin M. Jacobs - La Jolla CA
Lindsay A. Weaver - San Diego CA
Klein S. Gilhousen - San Diego CA

Assignee:

Qualcomm, Inc. - San Diego CA

International Classification:

H04B 7185
G01S 502

US Classification:

342353

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.

US Patent:

49013076, Feb 13, 1990

Filed:

Oct 17, 1986

Appl. No.:

6/921261

Inventors:

Klein S. Gilhousen - San Diego CA
Irwin M. Jacobs - La Jolla CA
Lindsay A. Weaver - San Diego CA

Assignee:

Qualcomm, Inc. - San Diego CA

International Classification:

H04J 1300

US Classification:

370 18

Abstract:

A multiple access, spread spectrum communication system and method for providing high capacity communications to, from, or between a plurality of system users, using code-division-spread-spectrum communication signals. The communication system uses means for providing marginal isolation between user communication signals. The marginal isolation is provided by generating simultaneous multiple steerable beams; using an omni-directional antenna with polarization enhancement; using power control devices to adjust the output power for user generated communication signals either in response to their input activity level, or in accordance with a minimum allowable power for maintaining a communication link. The communication system can also employ a means for transmitting a predetermined pilot chip sequence contiguous with the code-division-spread-spectrum communication signals. In further embodiments the communication system employs a plurality of user terminals linked to each other or to other services through one or more terrestrial or satellite repeaters.