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    METHOD AND APPARATUS FOR DIVERSITY RECEPTION OF TIME-DISPERSED SIGNALS
    1.
    发明专利
    METHOD AND APPARATUS FOR DIVERSITY RECEPTION OF TIME-DISPERSED SIGNALS 未知

    公开(公告)号：CA2065739C

    公开(公告)日：1996-09-24

    申请号：CA2065739

    申请日：1990-11-07

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

    IPC: H04B7/08 ,  H04L1/06 ,  H04B1/16 ,  H04B7/02

    Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (102, 103) is provided with a stored replica of expected reference information so that correlation with received time-dispersed signals (100, 101) produces an estimate of the transmission channel's impulse response as seen by each branch, and determines, among other things, phase error between the branch local oscillators and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

    AGC ISOLATION OF INFORMATION IN TDMA SYSTEMS
    2.
    发明专利
    AGC ISOLATION OF INFORMATION IN TDMA SYSTEMS 未知

    公开(公告)号：CA2001019A1

    公开(公告)日：1990-05-31

    申请号：CA2001019

    申请日：1989-10-19

    Applicant: MOTOROLA INC

    Inventor： DETTRO GREGORY J ,  LABEDZ GERALD P ,  ATKINSON FREDERICK G

    IPC: H04J3/00 ,  H01J3/02 ,  H01J3/14 ,  H03G3/20 ,  H04J3/10 ,  H04J3/14

    Abstract: In a communications system having transmissions containing certain information-of-interest (147, 149) at predetermined intervals in the transmission, there is provided a method for isolating and processing that information-of-interest. The method is characterized by sensing the start of a transmission (141) and isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time (145) from the sensed start of transmission (141). Thus, the information-of-interest is isolated principally on the basis of elapsed time. The method for isolating and processing that information-of-interest is further characterized by sensing (249) the start of a transmission from the received signal power of the transmission exceeding a predetermined threshold (259); AGCing the transmission (233) and attenuating the AGC'd transmission from a maximum level to a desired level before the information-of-interest is expected to arrive; isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time from the sensed start of transmission, by timing (263) the expected interval between the instant that the start of the transmission is sensed and the predetermined instant that the information-in-interest should arrive (whereby the information-of-interest is isolated principally on the basis of elapsed time); tagging the information (247) isolated about that instant for processing; and beginning processing (275) with information just preceeding the isolated information (whereby the reliability of the information detection is enhanced by one-to-several bits).

    METHOD FOR MULTI-CHANNEL RECEIPT OF DISPERSED ION TIME SIGNALS AND A DEVICE FOR MULTI-CHANNEL RECEIPT OF SIGNALS DISPERSED IN TIME
    4.
    发明专利
    METHOD FOR MULTI-CHANNEL RECEIPT OF DISPERSED ION TIME SIGNALS AND A DEVICE FOR MULTI-CHANNEL RECEIPT OF SIGNALS DISPERSED IN TIME 未知

    公开(公告)号：PL167072B1

    公开(公告)日：1995-07-31

    申请号：PL28773990

    申请日：1990-11-13

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

    IPC: H04B7/08 ,  H04L1/06

    Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

    5.
    发明专利
    未知

    公开(公告)号：PT92432B

    公开(公告)日：1994-02-28

    申请号：PT9243289

    申请日：1989-11-28

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD PAUL ,  ATKINSON FREDERICK G ,  DETTRO GREGORY J

    IPC: H04J3/00 ,  H01J3/02 ,  H01J3/14 ,  H03G3/20 ,  H04J3/10 ,  H04J3/14 ,  H04B7/212

    Abstract: In a communications system having transmissions containing certain information-of-interest (147, 149) at predetermined intervals in the transmission, there is provided a method for isolating and processing that information-of-interest. The method is characterized by sensing the start of a transmission (141) and isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time (145) from the sensed start of transmission (141). Thus, the information-of-interest is isolated principally on the basis of elapsed time. The method for isolating and processing that information-of-interest is further characterized by sensing (249) the start of a transmission from the received signal power of the transmission exceeding a predetermined threshold (259); AGCing the transmission (233) and attenuating the AGC'd transmission from a maximum level to a desired level before the information-of-interest is expected to arrive; isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time from the sensed start of transmission, by timing (263) the expected interval between the instant that the start of the transmission is sensed and the predetermined instant that the information-in-interest should arrive (whereby the information-of-interest is isolated principally on the basis of elapsed time); tagging the information (247) isolated about that instant for processing; and beginning processing (275) with information just preceeding the isolated information (whereby the reliability of the information detection is enhanced by one-to-several bits).

    METHOD FOR MULTI-CHANNEL RECEIPT OF DISPERSED ION TIME SIGNALS AND A DEVICE FOR MULTI-CHANNEL RECEIPT OF SIGNALS DISPERSED IN TIME
    6.
    发明专利
    METHOD FOR MULTI-CHANNEL RECEIPT OF DISPERSED ION TIME SIGNALS AND A DEVICE FOR MULTI-CHANNEL RECEIPT OF SIGNALS DISPERSED IN TIME 未知

    公开(公告)号：PL287739A1

    公开(公告)日：1991-07-29

    申请号：PL28773990

    申请日：1990-11-13

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

    IPC: H04B7/08 ,  H04L1/06 ,  H04B1/10 ,  H04L1/02

    Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

    METHOD AND APPARATUS FOR DIVERSITY RECEPTION OF TIME-DISPERSED SIGNALS
    7.
    发明专利
    METHOD AND APPARATUS FOR DIVERSITY RECEPTION OF TIME-DISPERSED SIGNALS 未知

    公开(公告)号：CA2065739A1

    公开(公告)日：1991-05-14

    申请号：CA2065739

    申请日：1990-11-07

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

    IPC: H04B7/08 ,  H04L1/06

    Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

    8.
    发明专利
    未知

    公开(公告)号：PT92432A

    公开(公告)日：1990-05-31

    申请号：PT9243289

    申请日：1989-11-28

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD PAUL ,  ATKINSON FREDERICK G ,  DETTRO GREGORY J

    IPC: H04J3/00 ,  H01J3/02 ,  H01J3/14 ,  H03G3/20 ,  H04J3/10 ,  H04J3/14

    Abstract: In a communications system having transmissions containing certain information-of-interest (147, 149) at predetermined intervals in the transmission, there is provided a method for isolating and processing that information-of-interest. The method is characterized by sensing the start of a transmission (141) and isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time (145) from the sensed start of transmission (141). Thus, the information-of-interest is isolated principally on the basis of elapsed time. The method for isolating and processing that information-of-interest is further characterized by sensing (249) the start of a transmission from the received signal power of the transmission exceeding a predetermined threshold (259); AGCing the transmission (233) and attenuating the AGC'd transmission from a maximum level to a desired level before the information-of-interest is expected to arrive; isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time from the sensed start of transmission, by timing (263) the expected interval between the instant that the start of the transmission is sensed and the predetermined instant that the information-in-interest should arrive (whereby the information-of-interest is isolated principally on the basis of elapsed time); tagging the information (247) isolated about that instant for processing; and beginning processing (275) with information just preceeding the isolated information (whereby the reliability of the information detection is enhanced by one-to-several bits).

    METODO Y APARATO PARA EL SALTO DE SEÑALES DE DATOS EN PAQUETES DIGITALES.
    9.
    发明专利
    METODO Y APARATO PARA EL SALTO DE SEÑALES DE DATOS EN PAQUETES DIGITALES. 未知

    公开(公告)号：MX9605956A

    公开(公告)日：1997-12-31

    申请号：MX9605956

    申请日：1996-02-08

    Applicant: MOTOROLA INC

    Inventor： ATKINSON FREDERICK G

    IPC: H04Q7/38 ,  H04J3/16 ,  H04Q7/22 ,  H04B07/208 ,  H04Q07/04

    Abstract: Se proporciona un método (300) y aparato (200) para determinar cuándo una señal de datos en paquete digital y una señal de voz se están transmitiendo de manera concomitante sobre un canal de voz de un sistema de comunicaciones. Una muestra de la señal transmitida (110) se compara (310) con una muestra pre-transmitida de la señal de datos en paquete digital (108). En respuesta a la comparacion, un transceptor de datos en paquetes digitales salta (314-320) del primer canal de voz a un canal de voz diferente para transmitir la señal de datos en paquete digital cuando se presenten las señales de voz.

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