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    AUTOMATIC OUTPUT CONTROL CIRCUITRY FOR RF POWER AMPLIFIERS WITH WIDE DYNAMIC RANGE
    81.
    发明专利
    AUTOMATIC OUTPUT CONTROL CIRCUITRY FOR RF POWER AMPLIFIERS WITH WIDE DYNAMIC RANGE 未知

    公开(公告)号：CA1233204A

    公开(公告)日：1988-02-23

    申请号：CA501344

    申请日：1986-02-07

    Applicant: MOTOROLA INC

    Inventor： VILMUR RICHARD J ,  D AVELLO ROBERT F

    IPC: H03G3/30 ,  H04B1/04

    Abstract: AUTOMATIC OUTPUT CONTROL CIRCUITRY FOR RF POWER AMPLIFIERS WITH WIDE DYNAMIC RANGE Automatic power output control circuitry is disclosed in which the magnitude of a radio frequency signal is maintained at one of a plurality of magnitudes selected in response to control signals. The radio frequency signal output from a variable output amplifier is sampled and the sample is further amplified and the dynamic range compressed prior to being rectified. The rectified power magnitude signal, which is nonlinearly related to the radio frequency signal magnitude, is adjusted by an adjustment factor selected by the control signals and employed in varying the output of the variable output amplifier to produce a corresponding radio frequency signal output magnitude.

    CONVERSION OF CALLS FROM AN AD HOC COMMUNICATION NETWORK
    82.
    发明专利
    CONVERSION OF CALLS FROM AN AD HOC COMMUNICATION NETWORK 未知

    公开(公告)号：CA2561739C

    公开(公告)日：2012-02-07

    申请号：CA2561739

    申请日：2005-03-21

    Applicant: MOTOROLA INC

    Inventor： GRIVAS NICK J ,  SOKOLA RAYMOND L ,  NEWELL MICHAEL A ,  D AVELLO ROBERT F ,  MEYERHOFF JEROME D ,  VAN BOSCH JAMES A ,  DAVIS SCOTT B

    IPC: H04B1/38 ,  H04M1/00 ,  H04W84/08

    Abstract: An improved system and procedure for allowing participants within a group conversation on a wireless communication network (10) to at least temporarily break away from a group conversation (90) and hold a side bar conversation. The side bar conversation (100) may comprise several different types, including a public conversation or may constitute a private conversation or private text messaging or data exchange. A group conversation user wishing to hold the side bar conversation uses his user interface to alert other group conversation user(s) with whom he would like to hold the side bar conversation. Either the initiating user or the recipient user(s) can recommend the type of side bar conversation to be had using their user interfaces (51). If the side bar conversation is a voice conversation, the original group conversation can still be audible in the back ground, but can be reduced in volume relative to the side bar conversation or squelched in and out when the side bar conversation is active.

    METHOD FOR SENDING LOCATION-BASED MESSAGES TO MOBILE USERS
    83.
    发明专利
    METHOD FOR SENDING LOCATION-BASED MESSAGES TO MOBILE USERS 未知

    公开(公告)号：CA2561379A1

    公开(公告)日：2005-10-27

    申请号：CA2561379

    申请日：2005-03-21

    Applicant: MOTOROLA INC

    Inventor： DAVIS SCOTT B ,  MEYERHOFF JEROME D ,  NEWELL MICHAEL A ,  VAN BOSCH JAMES A ,  D AVELLO ROBERT F ,  GRIVAS NICK J

    IPC: H04L12/58 ,  H04L29/08 ,  H04W4/02

    Abstract: A system and procedure for posting and receiving location-based messages in a wireless communication based network (10). The system allows messages to be posted to specified users and to be associated with a particular location (X 1) for which the message is pertinent. The messages can be left when a user in a first vehicle (26a) passes a particular location (X1), or the user can speci fy the location (X1) for the message even if not present at that location (X1). The messages can then be displayed at a user interface of the recipient vehicle (26b) either when the recipient nears that location (X1), or they ca n be reviewed in advance. Such location-based messages can be left either for another user or for the same user that is posting the method. The posted and received messages can be textual, audio, video, or pictorial messages and ma y be superimposed on computerized maps to make association between the message and the location more meaningful. Regardless, the disclosed system and metho ds allow messages to be associated with particular locations of interest.

    APPARATUS AND METHOD FOR ALTERNATIVE RADIOTELEPHONE SYSTEM SELECTION
    86.
    发明专利
    APPARATUS AND METHOD FOR ALTERNATIVE RADIOTELEPHONE SYSTEM SELECTION 未知

    公开(公告)号：SG83638A1

    公开(公告)日：2001-10-16

    申请号：SG1996003843

    申请日：1992-11-12

    Applicant: MOTOROLA INC

    Inventor： SCHELLINGER MICHAEL J ,  D AVELLO ROBERT F ,  KROLOPP ROBERT K

    IPC: H04B7/26 ,  H04W36/14 ,  H04M11/00 ,  H04Q7/36

    Abstract: A dual mode cellular cordless portable radiotelephone preferentially selects the cordless base station over the cellular system when in range of the cordless base station. When the cordless cellular portable is operating in the cellular mode, the radio channel associated with the cordless base station is sampled for a predetermined time. When a signal on the sampled cordless base station channel is detected, the cordless portable moves to the cordless mode and remains in the cordless mode for as long as the signal quality of the signal on the cordless base station channel exceeds a predetermined value.

    89.
    发明专利
    未知

    公开(公告)号：DE19580681T1

    公开(公告)日：1996-08-22

    申请号：DE19580681

    申请日：1995-03-24

    Applicant: MOTOROLA INC

    Inventor： LEE STEVEN G ,  IEHL BRIAN D ,  MANYA OMER ,  SCHELLINGER MICHAEL J ,  D AVELLO ROBERT F

    IPC: H04Q7/38 ,  H03J7/02 ,  H04B7/26 ,  H04B7/005 ,  H04Q7/20

    Abstract: A method generally improves the frequency accuracy in a communications system without requiring the use of accurate frequency references in all of the stations or types of stations. An accurate frequency reference is utilized in one of the stations or station types. The reference frequencies of the remaining stations or station types can be adjusted based upon the accurate reference frequency in one of the stations.

    Method for adjusting reference frequencies in a communication system
    90.
    发明专利
    Method for adjusting reference frequencies in a communication system 未知

    公开(公告)号：GB2295298A

    公开(公告)日：1996-05-22

    申请号：GB9601044

    申请日：1995-03-24

    Applicant: MOTOROLA INC

    Inventor： LEE STEVEN G ,  IEHL BRIAN D ,  MANYA OMER ,  SCHELLINGER MICHAEL J ,  D AVELLO ROBERT F

    IPC: H04Q7/38 ,  H03J7/02 ,  H04B7/26

    Abstract: A method generally improves the frequency accuracy in a communications system without requiring the use of accurate frequency references in all of the stations or types of stations. An accurate frequency reference is utilized in one of the stations or station types. The reference frequencies of the remaining stations or station types can be adjusted based upon the accurate reference frequency in one of the stations. In particular, a method for adjusting reference frequencies in a communication system comprising a portable station, a residential base station, and a public base station which generates a first reference frequency is characterized by the steps of adjusting (512) a second reference frequency in the portable station based upon the first reference frequency and adjusting (514) a third reference frequency of the residential base station based upon the second reference frequency.

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