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    • 4. 发明授权
    • Communications system with minimum error cryptographic resynchronization
    • 具有最小错误加密重新同步的通信系统
    • US07620181B2
    • 2009-11-17
    • US11110378
    • 2005-04-20
    • David M. BickslerWilliam S. Rogers
    • David M. BickslerWilliam S. Rogers
    • H04N7/167
    • H04L9/12H04L63/30H04L2209/34H04L2209/80H04N7/1675H04N21/242H04N21/4623
    • A synchronized communications system permits resynchronization in late-entry or fade-recovery conditions. A plurality of communications devices are operative for communicating in a synchronized, encrypted communications channel between each other. At least one of the communications devices is operative for continuously transmitting a resynchronization header that includes a start-of-message field that includes voice or data message information type, a message indicator field, a synchronization check field, a first error correction field computed over the start-of-message/message indicator/synchronization fields, a frame index field and a second error correction field computed on the frame index field. Receivers monitor the channel to decode these headers to perform late-entry or fade recovery.
    • 同步通信系统允许在后期进入或退色恢复条件下重新同步。 多个通信设备可操作用于在彼此之间的同步加密通信信道中进行通信。 通信设备中的至少一个可操作用于连续发送包括包括语音或数据消息信息类型的消息开始字段的再同步报头,消息指示符字段,同步检查字段,计算出的第一错误校正字段 消息开始/消息指示符/同步字段,帧索引字段和在帧索引字段上计算的第二纠错字段。 接收器监视通道以对这些报头进行解码以执行后期进入或淡入淡出恢复。