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    • 6. 发明授权
    • Device and method for SPR detection in a Mode-S transponder
    • 在Mode-S应答器中进行SPR检测的设备和方法
    • US07015856B1
    • 2006-03-21
    • US10866925
    • 2004-06-14
    • Timothy L. Johnson
    • Timothy L. Johnson
    • G01S13/93G01S13/74
    • G01S13/782
    • A Mode-S transponder is provided for detecting synchronization phase reversal (SPR) signals. The transponder includes a receiver for receiving a Mode-S signal that contains a P6 pulse having a Mode-S data segment and an SPR signal therein. The transponder also includes a phase detector that detects a phase change between first and second states in the received Mode-S signal. The phase detector includes an SPR qualifier that determine whether, following a state change, the Mode-S signal remains at one of the first and second states for at least a predetermined minimum time sufficient to qualify as a detector enable signal.
    • 提供了一种模式S转发器用于检测同步相位反转(SPR)信号。 应答器包括用于接收包含具有Mode-S数据段和其中SPR信号的P6脉冲的Mode-S信号的接收器。 应答器还包括相位检测器,其检测接收到的Mode-S信号中的第一和第二状态之间的相位变化。 相位检测器包括SPR限定器,其确定在状态改变之后,模式-S信号是否保持在第一和第二状态之一的至少预定的最小时间,足以被认定为检测器使能信号。