Journal
ANNALS OF TELECOMMUNICATIONS
Volume 76, Issue 1-2, Pages 1-17Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s12243-020-00778-z
Keywords
Component; Wavelet; Haar; WSN; Time-shift; IR-UWB
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This paper introduces an asynchronous Impulse Radio-Ultra Wide Band (IR-UWB) transmission solution for wireless sensor networks, utilizing the orthogonality between wavelet packets and finding the unique combination of shifted primitive packets to ensure receiver immunity to time-shift effects.
Wavelet-based Ultra Wide Band communications rely on receiver collecting data simultaneously from many transmitters and without interference thanks to the orthogonality between primitive wavelet packets. Nevertheless, there is a particular case for which the communication fails. Indeed, the time-shift between primitive wavelet packets results in a loss of the orthogonality of these wavelet packets. This paper proposes an asynchronous Impulse Radio-Ultra Wide Band (IR-UWB) transmission suitable in Wireless Sensor networks without any distinction between the transmitters. The originality of the proposed solution is to ensure a time-shift immunity of IR-UWB receivers by finding the unique combination of shifted primitive packets. For this purpose, finding the one zero result of successive subtractions between received and primitive packets is performed. Considering a given wavelet, the proposed solution is able to decode the shifted-mixed primitive packets from multiple transmitters whatever the time-shift between each packets.
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