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    32.
    发明专利
    未知

    公开(公告)号：MX174520B

    公开(公告)日：1994-05-23

    申请号：MX2075090

    申请日：1990-05-17

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD PAUL ,  RABE DUANCE C

    IPC: H04Q7/34 ,  H04B7/015 ,  H04B7/26 ,  H04B17/00 ,  H04L1/02 ,  H04L7/00 ,  H04M11/00 ,  H04Q7/04

    Abstract: There is provided a method of rapid Received Signal Strength Indication (RSSI) of a time-dispersed signal having echoes (D, Fig. 1C) (where the time dispersal represents a significant fraction or more of the transmitted symbol interval). It comprises a sliding correlation (304) of a received signal against a known sequence or via channel sounding to obtain the time-dispersal function of the communications channel upon which the signal is transmitted (306/307) and a summation of the squares of the quadrature components of the energies at relative maxima of the correlations (306/307) (correlation peaks determined with reference to a threshold level (305)) to integrate the energy defined by the correlation function to determine the energy present among the time-dispersed echoes utilizing the time-dispersal function. Thus, the energy present in the time-dispersed echoes is related to the received signal strength, the RSSI comprises a scalar of the energy present and the scalar comprises a function of the receiver's gain, RSSI determinations during any given interval are less dependent upon the ambulatory velocity of the receiver, and RSSI determinations of equivalent accuracy are obtained more rapidly or more accurate RSSI determinations are obtained per unit time.

    33.
    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).

    36.
    发明专利
    未知

    公开(公告)号：PT94149A

    公开(公告)日：1992-02-28

    申请号：PT9414990

    申请日：1990-05-24

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD PAUL ,  RABE DUANE C

    IPC: H04Q7/34 ,  H04B7/015 ,  H04B7/26 ,  H04B17/00 ,  H04L1/02 ,  H04L7/00 ,  H04M11/00 ,  H04B ,  H03M

    Abstract: There is provided a method of rapid Received Signal Strength Indication (RSSI) of a time-dispersed signal having echoes (D, Fig. 1C) (where the time dispersal represents a significant fraction or more of the transmitted symbol interval). It comprises a sliding correlation (304) of a received signal against a known sequence or via channel sounding to obtain the time-dispersal function of the communications channel upon which the signal is transmitted (306/307) and a summation of the squares of the quadrature components of the energies at relative maxima of the correlations (306/307) (correlation peaks determined with reference to a threshold level (305)) to integrate the energy defined by the correlation function to determine the energy present among the time-dispersed echoes utilizing the time-dispersal function. Thus, the energy present in the time-dispersed echoes is related to the received signal strength, the RSSI comprises a scalar of the energy present and the scalar comprises a function of the receiver's gain, RSSI determinations during any given interval are less dependent upon the ambulatory velocity of the receiver, and RSSI determinations of equivalent accuracy are obtained more rapidly or more accurate RSSI determinations are obtained per unit time.

    37.
    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).

    38.
    发明专利
    未知

    公开(公告)号：NO885763D0

    公开(公告)日：1988-12-27

    申请号：NO885763

    申请日：1988-12-27

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD PAUL

    IPC: H04B7/02 ,  H04B7/26 ,  H04W36/18 ,  H04W36/30 ,  H04W72/08 ,  H04B

    Abstract: A cellular system employing time division messages transmitted from a plurality of radiators (407, 409, 411) in each cell is disclosed. A first electromagnetic signal at a particular frequency is transmitted during one time slot (903) from one of the plurality of radiators. A second electromagnetic signal at the same frequency is transmitted during another time slot (917) from a second one of the plurality of radiators. A remote unit (401,403) selects the best electromagnetic signal and communicates the selection to a cell controller (413), which selects a third time slot for transmission of a message from the radiator transmitting the best electromagnetic signal.

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