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Synchronization technique for spread spectrum frequency hopped data links and radios using the same

机译:扩频跳频数据链路和使用其的无线电的同步技术

摘要

A method of obtaining coarse synchronization in a frequency hopped/direct sequence spread spectrum (FH/DSS) time division multiple access (TDMA) data link network includes tuning the receiver to a first frequency used in the data link network. Then, signal strength of signals received on the first frequency during a sample time period is observed to obtain a sample energy pattern. An expected energy pattern during a time uncertainty window is determined based upon a known hopping pattern. Then, the sample energy pattern is compared to a first portion of the expected energy pattern, with the first portion of the expected energy pattern corresponding to a first time period within the time uncertainty window. A determination is then made as to whether the first time period is a coarse synchronization candidate based upon the comparison. If it is determined that the time period is a coarse synchronization candidate, one or more additional comparisons on different frequencies can be used to verify the hypothesis.
机译:一种在跳频/直接序列扩频(FH / DSS)时分多址(TDMA)数据链路网络中获得粗同步的方法,该方法包括将接收机调谐到数据链路网络中使用的第一频率。然后,观察在采样时间段期间在第一频率上接收的信号的信号强度,以获得采样能量模式。基于不确定的跳变图来确定时间不确定性窗口内的预期能量图。然后,将样本能量模式与预期能量模式的第一部分进行比较,其中预期能量模式的第一部分对应于时间不确定性窗口内的第一时间段。然后基于比较确定第一时间段是否是粗同步候选。如果确定该时间段是粗同步候选,则可以使用在不同频率上的一个或多个其他比较来验证该假设。

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