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首页> 外文期刊>European transactions on telecommunications >Simultaneous Frame and Bit Synchronization of HF Receivers by Constant False Alarm Methods
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Simultaneous Frame and Bit Synchronization of HF Receivers by Constant False Alarm Methods

机译：恒定虚警方法同时进行HF接收机的帧和比特同步

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摘要

An application to HF radio links of the constant false alarm rate synchronization method based on both preamble detection and oversampling at the receiver is proposed and discussed. The method provides both frame and bit synchronization: the former is achieved by correlating the received samples with a reference preamble pattern; the latter by oversampling the incoming signal. A closed form expression of the probability of miss is derived for the general case and a statistical analysis of the synchronization method applied to HF transmissions is carried out on a simulation basis. Several curves which show the distributions of probability of miss for different propagation conditions and different fade margins are included. Inspection of these results shows that the reliability of the synchronization method has to be improved through the introduction of a suitable synchronization strategy involving a certain number of pre-alarm states.
机译：提出并讨论了基于前同步码检测和接收机过采样的恒定误报率同步方法在HF无线链路中的应用。该方法提供帧和比特同步：前者是通过将接收到的样本与参考前同步码模式相关来实现的；后者通过对输入信号进行过采样来实现。对于一般情况，得出未命中概率的闭式表达式，并在模拟的基础上对应用于HF传输的同步方法进行统计分析。包括了一些曲线，这些曲线示出了针对不同传播条件和不同衰落裕度的未命中概率的分布。检查这些结果表明，必须通过引入适当的同步策略来提高同步方法的可靠性，该策略涉及一定数量的预警状态。

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