有哪些信誉好的足球投注网站a pattern construction scheme for neural network-based cognitive communication一个模式为神经网络认知通信建设方案.pdfVIP
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Entropy 2011, 13, 64-81; doi:10.3390/
OPEN ACCESS
entropy
ISSN 1099-4300
/journal/entropy
Article
A Pattern Construction Scheme for Neural Network-Based
Cognitive Communication
Berk Ustundag * and Ozgur Orcay
Faculty of Electricity and Electronics, Istanbul Technical University (iTü), 34469 Istanbul, Turkey;
E-Mail: oorcay@
* Author to whom correspondence should be addressed; E-Mail: bustundag@.tr;
Tel.: +90-212-285-6900; Fax: +90-216-346-6187.
Received: 1 December 2010; in revised form: 21 December 2010 / Accepted: 22 December 2010 /
Published: 7 January 2011
Abstract: Inefficient utilization of the frequency spectrum due to conventional regulatory
limitations and physical performance limiting factors, mainly the Signal to Noise Ratio
(SNR), are prominent restrictions in digital wireless communication. Pattern Based
Communication System (PBCS) is an adaptive and perceptual communication method
based on a Cognitive Radio (CR) approach. It intends an SNR oriented cognition
mechanism in the physical layer for improvement of Link Spectral Efficiency (LSE). The
key to this system is construction of optimal communication signals, which consist of
encoded data in different pattern forms (waveforms) depending on spectral availabilities.
The signals distorted in the communication medium are recovered according to the
pre-trained pattern glossary by the perceptual receiver. In this stu
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