FFH

Research of Communication Technology Using FFH/ DS Hybrid Spread Spectrum

FFH/DS混合扩频体制通信技术研究

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Study on Anti-Jamming Performance of FFH/ MFSK System

FFH/MFSK系统抗干扰性能研究

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Isolation and Identification of Lactobacillus casei from Rumen of a Young Cattle and Cloning of Its Acid-Resistant Gene ffh

犊牛瘤胃干酪乳杆菌分离鉴定及其耐酸相关基因ffh的克隆

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Conclusion: The acid-resistant gene ffh existed in Lactobacillus casei.

结论：干酪乳杆菌中存在耐酸相关基因ffh。

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Secondly, the multiple access interference problem in FFH/ MFSK system is analyzed.

然后，分析了FFH/MFSK通信系统中存在的多址干扰问题。

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FFH system is an important spread-spectrum system, which has excellent anti-interference capacity and causes great attention in the research field of military communication.

作为扩频通信体制中的一种重要类型，快速跳频系统因其出色的抗干扰、抗截获和抗人为阻塞能力，在当前军事通信研究领域引起广泛关注。

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Experiment on 2.5 Gbit/ s symbol overlapping fast frequency-hopping optical code division multiple access ( SO-FFH OCDMA) system with single user is designed and demonstrated.

设计并实现了单用户、数据速率2.5Gbit/s的码位重叠快跳频光码分多址（SO-FFH OCDMA）实验系统。

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CONCLUSION: The homology of the acid-resistant gene ffh in cariogenic genus is high.

结论：各致龋菌耐酸相关基因ffh同源性高。

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OBJECTIVE: To detect the mutation of the acid-resistant gene ffh in the fluoride-resistant strain of Streptococcus mutans.

目的：检测变形链球菌耐氟菌株中耐酸相关基因ffh是否存在突变。

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FFT-based Detection of Existence of Synchronization Signal for FFH System

基于FFT的快速跳频同步信号存在性检测

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A New ALE Calling Method In FFH/ FSK System

短波快速跳频系统下新的ALE呼叫方法

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The Soft-decision and Erasure Decoding Method in FFH Systems

软判决与消去解码方法在快速跳频系统中的应用

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