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    Chaos in sync - new communication systems


    (Phys.org) —In today's wireless communication systems, the wireless signals are non-chaotic, meaning they have a well-defined period and frequency. Non-chaotic wireless signals are used in many applications, such as satellite communications, GPS navigation, cell phones, and Wi-Fi devices. However, as many people know first-hand, wireless systems usually have inferior performance compared to wired systems. The problem is due to physical impediments that the wireless signal faces in open space caused by the atmosphere, water, mountains, buildings, and other different media. Now in a new study, researchers have investigated how wireless communication could be implemented with chaotic signals, and found that chaotic signals could overcome some of these physical constraints and lead to superior performance...

    http://phys.org/news/2013-05-chaos-wireless.html
    http://prl.aps.org/pdf/PRL/v110/i18/e184101

    http://en.wikipedia.org/wiki/Lorenz_system
    http://en.wikipedia.org/wiki/Lyapunov_exponent
    http://en.wikipedia.org/wiki/Topological_entropy

    "Traditionally, engineers sought to minimize noise and distortion in system designs. Today, Aerospace scientists are seeking to explicitly harness these effects for useful engineering purposes..."
    http://www.aerospace.org/publications/crosslink-magazine/crosslink-spring-2011/nonlinear-dynamics-and-chaos-from-concept-to-application/
     http://fourier.eng.hmc.edu/e84/silva.pdf 

    Wed, May 15, 2013  Permanent link

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