KEYWORDS: Radio optics, Pulse signals, Telecommunications, Unmanned aerial vehicles, Fiber optics, Signal processing, Control systems, Waveguides, Telecommunication networks, Radio over Fiber
The article is devoted to the consideration of the possibility of using the chirp function of optical pulses as a resource for radio segment control in RoF-systems. Such a resource does not belong to the traditional telecommunication resource, is realized at the physical level and is characterized by high speed. The scheme of RoF-segment construction is proposed - using the developed components: the converter «Chirp To Amplitude» and interference splitter. In the case when the antenna array forms a spatial separation of VLANs, it is shown that the parameter of payload of device interfaces improves in relation to the VLANs traditionally formed on the radio segment.
KEYWORDS: Holograms, Holography, Digital holography, Data storage, Error analysis, Binary data, Remote sensing, Data modeling, Reliability, Digital imaging
The holographic coding method improves the reliability of storing digital information in memory systems that are subject to external influences that introduce a large number of errors. The method is based on writing to memory instead of the initial data of a digital hologram created in the virtual space by a wave from an input source. The property of the hologram divisibility is used, allowing to recover the recorded data block by its fragment. The achieved level of noise immunity is determined by the size of the hologram. For an 8-bit data block, a 256-bit hologram recording provides recovery of information when 75% of the recorded hologram is lost. The developed decoder corrects the packet of dependent (grouped) errors that distort all bits of the hologram. The number of random independent errors that the decoder corrects can be up to 40% of the recorded information.
Based on the analysis and the urgent tasks of communication systems designed to serve the Industrial Internet through RoF technology, the article explores the significance of a chirped signal on the principles of building segments of RoF systems, and then the principles of generation and conversion of this category of signals.
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