GEOGRAPHIC-AREA SELECTIVE LOW-EARTH SATELLITE-BASED PAGING BROADCAST SYSTEM AND METHOD.
    83.
    发明公开
    GEOGRAPHIC-AREA SELECTIVE LOW-EARTH SATELLITE-BASED PAGING BROADCAST SYSTEM AND METHOD. 失效
    方法和系统广播FOR使用PERSONRUF地球卫星低水平允许地理区域的照明选择。

    公开(公告)号:EP0609429A4

    公开(公告)日:1995-02-15

    申请号:EP93920247

    申请日:1993-08-23

    申请人: MOTOROLA INC

    IPC分类号: H04Q7/38 H04B7/185 H04B7/195

    摘要: The present invention includes a low-earth satellite-based paging broadcast system (100) and method (200, 300) that maximizes spectral efficiency and minimizes power expenditure for the broadcast of paging messages by broadcasting the messages to terminator- or originator-selectable portions of the total system coverage area. The terminator selects a long-term preferred geographic area (LTPGA), and optionally, a short-term preferred geographic area (STPGA). The originator provides the terminator ID, the message, and optionally provides a customized preferred geographic area (CPGA). Terminators and originators can easily modify the selectable geographic areas (SGA(s)): LTPGA(s), STPGA(s), and CPGA(s). The gateway converts the SGA(s) to addressable coverage areas (ACA(s)), and transmits a signal including the paging information, and ACA(s) to at least a first communication satellite (COM SAT). The COM SAT(s) provide for crosslinking the signal to other COM SAT(s) and for broadcasting the paging information to the ACA(s).

    EP0502977A4 -
    85.
    发明公开
    EP0502977A4 - 失效
    EP0502977A4 - Google专利

    公开(公告)号:EP0502977A4

    公开(公告)日:1994-02-16

    申请号:EP91901030

    申请日:1990-11-23

    申请人: MOTOROLA, INC.

    摘要: A satellite based simulcast paging communication system comprises a plurality of terrestrial stations (118) capable of simulcasting the paging information with at least one satellite (102) for reception by one or more of a plurality of terrestrial receivers (900) (pagers). Also included is at least one control station (110) for determining where and how to deliver the paging information to achieve simulcast transmission.

    摘要翻译: 基于卫星的联播寻呼通信系统包括多个能够与至少一个卫星(102)联播寻呼信息的地面电台(118),供多个地面接收机(900)(寻呼机)中的一个或多个接收。 还包括用于确定何处以及如何传送寻呼信息以实现联播传输的至少一个控制站(110)。

    GLOBAL COMMUNICATION SYSTEM, RECEIVER AND METHOD FOR OPERATING THE SAME
    86.
    发明公开
    GLOBAL COMMUNICATION SYSTEM, RECEIVER AND METHOD FOR OPERATING THE SAME 失效
    WORLDWIDE通信系统中,接收器及其工作方法。

    公开(公告)号:EP0500564A1

    公开(公告)日:1992-09-02

    申请号:EP90915384.0

    申请日:1990-10-01

    申请人: MOTOROLA, INC.

    IPC分类号: H04B7 H04W84

    摘要: Est décrit un système mondial de communications qui possède des transmetteurs de terre (1108), destinés à transmettre des signaux de messages codés dans chacune des zones comprises parmi une pluralité de zones géographiques (1102, 1104, 1106). Le système mondial de communications comprend également au moins un émetteur de satellite (1114) qui transmet les signaux de messages codés dans chacune des zones géographiques mondiales. Les transmissions des signaux des messages codés comprennent des mots codes d'identification des canaux qui servent à identifier les canaux de terre et le canal du satellite. Le canal de terre est sélectionné pour le fonctionnement lorsque le mot code d'identification du canal reçu correspond à un premier mot code prédéterminé d'identification du canal. Le canal du satellite est sélectionné pour le fonctionnement lorsque le mot code d'identification du canal ne correspond pas à un second mot code prédéterminé d'identification du canal. Le canal de terre est périodiquement resélectionné lorsque le mot code d'identification du canal reçu sur le canal du satellite correspond à un second mot code prédéterminé d'identification du canal.

    Satellite control link for paging system
    87.
    发明公开
    Satellite control link for paging system 失效
    Satellitenübertragungssystemfürein Rufsystem。

    公开(公告)号:EP0486229A2

    公开(公告)日:1992-05-20

    申请号:EP91310348.7

    申请日:1991-11-08

    申请人: PAGEMART INC.

    IPC分类号: H04Q7/02 H04B7/19

    摘要: A paging system includes a satellite uplink (40) for assembling paging information and transmitting it to a satellite (26). The satellite (26) is then operable to transmit in a simulcast manner all the information to various regional paging systems (42). Each of the paging systems (42) includes a plurality of towers (10) each containing a satellite receiver (50), a satellite dish (48) associated therewith and a paging transmitter (52). Each of the satellite receivers (50) are operable to receive the information transmitted from the satellite (26) at substantially the same time such that there is no phase difference between any of the towers, regardless of location. Therefore, the transmitters (50) can transmit through antennas (12) information at the paging frequency with substantially no relative delays relative to each of the antennas (12). A backup link receiver (28) is provided for interfacing with a backup link transmitter (70). In the event of a failure of the receivers (50) or the satellite (26), the link transmitter (70) will transmit the paging information directly to select ones of the towers (10) over a separate frequency.

    摘要翻译: 寻呼系统包括用于组播寻呼信息并将其发送到卫星(26)的卫星上行链路(40)。 卫星(26)然后可操作以以联播方式将所有信息发送到各种区域寻呼系统(42)。 每个寻呼系统(42)包括多个塔架(10),每个塔架包含卫星接收机(50),与之相关的卫星天线(48)和寻呼发射机(52)。 每个卫星接收器(50)可操作以在基本上相同的时间接收从卫星(26)发送的信息,使得任何一个塔之间不存在相位差,而与位置无关。 因此,发射机(50)可以通过天线(12)以相对于每个天线(12)基本上没有相对延迟的寻呼频率发送信息。 备用链路接收器(28)被提供用于与备用链路发射机(70)进行接口。 在接收机(50)或卫星(26)发生故障的情况下,链路发射机(70)将直接发送寻呼信息,以分离频率选择塔(10)中的一个。

    Vehicle telematics satellite data transceiver utilizing FM radio circuitry
    90.
    发明公开
    Vehicle telematics satellite data transceiver utilizing FM radio circuitry 审中-公开
    与FM无线电电路车辆远程信息处理的卫星数据发射机

    公开(公告)号:EP1865611A3

    公开(公告)日:2012-04-04

    申请号:EP07075406.4

    申请日:2007-05-30

    IPC分类号: H04B1/38 H04B1/00

    摘要: A transceiver (10) for transmitting and receiving satellite RF signals is provided. The transceiver (10) includes RF front-end receiver circuitry (20) capable of receiving FM radio broadcast RF signals and converting the FM radio broadcast RF signals to an intermediate frequency. The RF front-end receiver circuitry (20) is configured to receive RF signals at greater than 108 MHz and convert the RF signals to an intermediate frequency. The transceiver (10) also includes signal processing circuitry (40) including at least one DSP core (42) for demodulating intermediate frequency signals provided by the front-end circuitry (20) and for modulating data to be transmitted into baseband modulated data signals, and at least one audio output (46). The transceiver (10) further includes RF transmitter circuitry (30) configured to convert the baseband modulated data signals provided by the at least one DSP core (42) into modulated transmit signals having a frequency greater than 108 MHz for transmission and transmit the modulated transmit signals.