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    • 3. 发明授权
    • Method and apparatus for synchronizing a receiver to a transmitted
signal while conserving power
    • 同时保持功率同步接收机与发送信号的方法和装置
    • US5241568A
    • 1993-08-31
    • US801329
    • 1991-12-02
    • Frank FernandezRichard A. Erhart
    • Frank FernandezRichard A. Erhart
    • H04L7/04H04L7/10H04W52/02H04W88/02
    • H04L7/10H04W52/0229H04L7/042H04W88/022
    • A receiver (200) receives (203) a transmitted signal having a first predetermined signal for indicating a start of a new transmission to the receiver and having a second predetermined signal inserted at periodic sampling time intervals for synchronizing the receiver to the transmitted signal. The receiver (200) synchronizes to the transmitted signal by detecting the first predetermined signal (208) followed by the second predetermined signal (210), and establishing subsequent periodic sampling time intervals therefrom. The receiver (200) conserves power (228) during a second portion of a periodic sampling time interval following a detection of a first portion of the second predetermined signal (210) during a first portion of the periodic sampling time interval. If the receiver (200) does not detect the first portion of the second predetermined signal (210) then the receiver (200) searches for a portion of the first predetermined signal (208) during the second portion of the periodic sampling time interval to determine a possible start of a new transmission.
    • 接收机(200)接收(203)具有第一预定信号的发射信号,用于指示接收机的新传输的开始,并具有以周期性采样时间间隔插入的第二预定信号,以使接收机与发射信号同步。 接收机(200)通过检测第一预定信号(208)跟随第二预定信号(210)同步到所发送的信号,并从其建立后续周期性采样时间间隔。 在周期性采样时间间隔的第一部分中检测到第二预定信号(210)的第一部分之后,接收器(200)在周期性采样时间间隔的第二部分期间节省功率(228)。 如果接收机(200)没有检测到第二预定信号(210)的第一部分,则接收机(200)在周期性采样时间间隔的第二部分期间搜索第一预定信号(208)的一部分,以确定 可能开始新的传输。
    • 4. 发明授权
    • Method and device for off hour over the air software programming of
selective call receivers
    • 选择呼叫接收机的空中软件编程方法和装置
    • US5726639A
    • 1998-03-10
    • US521405
    • 1995-08-30
    • Osvaldo RomeroFrank Fernandez
    • Osvaldo RomeroFrank Fernandez
    • G08B5/22H04W8/24H04W88/02G08B3/10H04B7/00H04L7/00
    • H04W8/245G08B5/229H04W88/022
    • A selective call receiver (10) utilizes a method for performing over-the-air software programming when the selective call receiver (10) is on or switched off by a user. A first selective call signal is received and programming related information including an anticipated time of transmission of a second selective call signal is received. The selective call receiver (10) is prepared to receive the second selective call signal in response to the programming related information received, whereby the receiver circuitry (30) is energized at the anticipated time of transmission to receive the second selective call signal. The selective call receiver (10) is further switched on at the anticipated time of transmission of the second selective call signal, and the receiver circuitry (30) is energized to receive the second selective call signal when the user has switched off the selective call receiver (10) prior to the anticipated time.
    • 选呼接收机(10)利用一种用于当选呼接收机(10)由用户接通或切断时执行空中软件编程的方法。 接收第一选呼信号,并接收包括第二选呼信号的预期发送时间的编程相关信息。 选择呼叫接收机(10)准备响应于所接收的编程相关信息而接收第二选呼信号,由此接收机电路(30)在传输的预期时间被激励以接收第二选呼信号。 选择呼叫接收机(10)在传输第二选呼信号的预期时间进一步接通,并且当用户已经关闭选呼接收机时,接收机电路(30)被激励以接收第二选呼信号 (10)。