公开(公告)号：DE19681100T1

公开(公告)日：1998-03-19

申请号：DE19681100

申请日：1996-01-29

Applicant: MOTOROLA INC

Inventor： GURNEY DAVID PAUL ,  KELTON JAMES ROBERT

IPC: H04L1/00 ,  H04L1/20 ,  H04L7/033 ,  H04L27/233 ,  H04L7/00 ,  H04B7/005 ,  H04B7/26 ,  H04L27/22

公开(公告)号：AU4705496A

公开(公告)日：1997-05-22

申请号：AU4705496

申请日：1996-01-29

Applicant: MOTOROLA INC

Inventor： GURNEY DAVID PAUL ,  KELTON JAMES ROBERT

IPC: H04L1/00 ,  H04L1/20 ,  H04L7/033 ,  H04L27/233 ,  H04L7/00 ,  H03D1/06 ,  H04B3/46 ,  H04L27/14

公开(公告)号：AU689588B2

公开(公告)日：1998-04-02

申请号：AU2457597

申请日：1997-04-11

Applicant: MOTOROLA INC

Inventor： BAUM KEVIN ,  KELTON JAMES ROBERT ,  RASKY PHILLIP DAVID

IPC: H04J3/06

Abstract: The present invention provides a communication system, device and method of reverse link symbol timing synchronization of transmited signals to facilitate reverse link timing synchronization. A base unit transmits a forward link signal, receives a reverse link signal, and determines a timing offset for signals received on a reverse link timing synchronization channel, wherein the reverse link synchronization channel comprises a plurality of adjacent reverse link carrier frequencies that are utilized by a multicarrier subscriber unit to facilitate reverse link symbol timing synchronization. A plurality of multicarrier subscriber units receive a forward link signal and transmit a reverse link symbol timing synchronization burst on a reverse link timing synchronization channel wherein the reverse link timing synchronization channel comprises a plurality of adjacent reverse link carrier frequencies that are utilized by each subscriber unit, and adjusts a timing reference for transmitting signals to facilitate reverse link timing synchronization.

公开(公告)号：BR9607158A

公开(公告)日：1997-11-11

申请号：BR9607158

申请日：1996-01-29

Applicant: MOTOROLA INC

Inventor： GURNEY DAVID PAUL ,  KELTON JAMES ROBERT

IPC: H04L1/00 ,  H04L1/20 ,  H04L7/033 ,  H04L27/233 ,  H04L7/00 ,  H03D1/06 ,  H04B3/46 ,  H04L27/14

公开(公告)号：CA2223982C

公开(公告)日：2002-08-06

申请号：CA2223982

申请日：1997-04-11

Applicant: MOTOROLA INC

Inventor： BAUM KEVIN ,  KELTON JAMES ROBERT ,  PETERSON ROGER LAURIN ,  NADGAUDA NIKHIL S

IPC: H04B1/10 ,  H04B7/005 ,  H04L5/02 ,  H04L5/14 ,  H04Q7/32 ,  H04Q7/30

Abstract: The present invention provides a system for a method, system (300), subscrib er unit (320, 330), and base/headend unit (310) for a bandwidth efficient multiple user digital communication system (300) that facilitates multiple user reverse link communication using overlapped transmit signal spectra of at least two overlap bandwidth subscriber units (320, 330). Overlap bandwidth subscriber units (320, 330) receive a forward link signal, each deriving a frequency reference from the forward link signal and a symbol timing referen ce from the forward link signal, and transmitting a reverse link signal to the base/headend unit (310) that receives a composite reverse link signal of the reverse link signals. Each reverse link signal includes at least one modulat ed data carrier with distinct carrier frequencies. Each transmitted reverse lin k signal has a symbol timing responsive to the symbol timing reference, and th e frequency spectra of the reverse link signals overlap using overlapped transmit signal spectra of at least two overlap bandwidth subscriber units (320, 330).

公开(公告)号：AU692737B2

公开(公告)日：1998-06-11

申请号：AU2727897

申请日：1997-04-11

Applicant: MOTOROLA INC

Inventor： BAUM KEVIN ,  NADGAUDA NIKHIL S ,  PETERSON ROGER LAURIN ,  KELTON JAMES ROBERT

IPC: H04B1/10 ,  H04B7/005 ,  H04L5/02 ,  H04L5/14 ,  H04B1/40

Abstract: The present invention provides a method, system, subscriber unit, and base/headend unit for a bandwidth efficient multiple user digital communication system that facilitates multiple user reverse link communication using overlapped transmit signal spectra of at least two overlap bandwidth subscriber units. Overlap bandwidth subscriber units receive a forward link signal, each deriving a frequency reference from the forward link signal and a symbol timing reference from the forward link signal, and transmitting a reverse link signal to the base/headend unit that receives a composite reverse link signal of the reverse link signals. Each reverse link signal includes at least one modulated data carrier with distinct carrier frequencies. Each transmitted reverse link signal has a symbol timing responsive to the symbol timing reference, and the frequency spectra of the reverse link signals overlap using overlapped transmit signal spectra of at least two overlap bandwidth subscriber units.

公开(公告)号：CA2223982A1

公开(公告)日：1997-11-06

申请号：CA2223982

申请日：1997-04-11

Applicant: MOTOROLA INC

Inventor： BAUM KEVIN ,  PETERSON ROGER LAURIN ,  NADGAUDA NIKHIL S ,  KELTON JAMES ROBERT

IPC: H04B1/10 ,  H04B7/005 ,  H04L5/02 ,  H04L5/14 ,  H04Q7/32 ,  H04Q7/30

Abstract: The present invention provides a system for a method, system (300), subscrib er unit (320, 330), and base/headend unit (310) for a bandwidth efficient multiple user digital communication system (300) that facilitates multiple user reverse link communication using overlapped transmit signal spectra of at least two overlap bandwidth subscriber units (320, 330). Overlap bandwidth subscriber units (320, 330) receive a forward link signal, each deriving a frequency reference from the forward link signal and a symbol timing referen ce from the forward link signal, and transmitting a reverse link signal to the base/headend unit (310) that receives a composite reverse link signal of the reverse link signals. Each reverse link signal includes at least one modulat ed data carrier with distinct carrier frequencies. Each transmitted reverse lin k signal has a symbol timing responsive to the symbol timing reference, and th e frequency spectra of the reverse link signals overlap using overlapped transmit signal spectra of at least two overlap bandwidth subscriber units (320, 330).

公开(公告)号：BR9606584A

公开(公告)日：1997-10-28

申请号：BR9606584

申请日：1996-07-11

Applicant: MOTOROLA INC

Inventor： CUDAK MARK CONRAD ,  KELTON JAMES ROBERT ,  MUELLER BRUCE DALE

IPC: H04J3/00 ,  H04B7/26 ,  H04W56/00 ,  H04B7/212

Abstract: A method of synchronizing a fixed access unit (16) into a time division multiple access (TDMA) system (10). The method includes the steps of receiving a first timing advance channel time slot (86) at the fixed access unit (16), sending a message advanced in time by an offset value over a second time slot (88), receiving an acknowledgment from the TDMA system (10) that the message was received, and advancing a subsequently transmitted communication based on the offset value.

公开(公告)号：CA2223793C

公开(公告)日：2002-03-26

申请号：CA2223793

申请日：1997-04-11

Applicant: MOTOROLA INC

Inventor： BAUM KEVIN L ,  RASKY PHILLIP DAVID ,  KELTON JAMES ROBERT

IPC: H04J3/06 ,  H04Q7/30 ,  H04Q7/22 ,  H04Q7/32

Abstract: The present invention provides a communication system, device and method of reverse link symbol timing synchronization of transmited signals to facilitate reverse link timing synchronization. A base unit transmits a forward link signal, receives a reverse link signal, and determines a timing offset for signals received on a reverse link timing synchronization channel, wherein the reverse link synchronization channel comprises a plurality of adjacent reverse link carrier frequencies that are utilized by a multicarrier subscriber unit to facilitate reverse link symbol timing synchronization. A plurality of multicarrier subscriber units receive a forward link signal and transmit a reverse link symbol timing synchronization burst on a reverse link timing synchronization channel wherein the reverse link timing synchronization channel comprises a plurality of adjacent reverse link carrier frequencies that are utilized by each subscriber unit, and adjusts a timing reference for transmitting signals to facilitate reverse link timing synchronization.

公开(公告)号：CA2223793A1

公开(公告)日：1997-11-06

申请号：CA2223793

申请日：1997-04-11

Applicant: MOTOROLA INC

Inventor： KELTON JAMES ROBERT ,  BAUM KEVIN L ,  RASKY PHILLIP DAVID

IPC: H04J3/06 ,  H04Q7/30 ,  H04Q7/22 ,  H04Q7/32

Abstract: The present invention provides a communication system, device and method of reverse link symbol timing synchronization of transmited signals to facilitate reverse link timing synchronization. A base unit transmits a forward link signal, receives a reverse link signal, and determines a timing offset for signals received on a reverse link timing synchronization channel, wherein the reverse link synchronization channel comprises a plurality of adjacent reverse link carrier frequencies that are utilized by a multicarrier subscriber unit to facilitate reverse link symbol timing synchronization. A plurality of multicarrier subscriber units receive a forward link signal and transmit a reverse link symbol timing synchronization burst on a reverse link timing synchronization channel wherein the reverse link timing synchronization channel comprises a plurality of adjacent reverse link carrier frequencies that are utilized by each subscriber unit, and adjusts a timing reference for transmitting signals to facilitate reverse link timing synchronization.