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Proceedings Paper

Array processing based on the polarization diversity: the example of an ionospheric radio link
Author(s): Yvon M. Erhel; Clency Perrine; Dominique Lemur; Alain Bourdillon
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Paper Abstract

The aim of this paper is to present a high data rate transmission system through the ionospheric channel in the HF band (3-30 MHz). The applications expected in this study are image transmission and real-time videoconferencing. Very high rates are required compared to the standard modems (4.8 kbits/s). Therefore, an array processing performs in the multi channel receiving system. Its main originality stands in the development of a compact device of collocated antennas, the spatial responses of which are different one from each other. Besides, synchronization (Zero Crossing Detector) and spatio temporal equalization (L.M.S. algorithm) as well resort to classical and well-tested techniques involving training sequences. An experimental radio link has been under test with a range of 800 km. The corresponding results underlines the improvement of the bit transfer rate which reaches 20 kbits/s (QAM 16 in a 6 kHz bandwidth) or 30 kbits/s (QAM 16 in a 9 kHz bandwidth). Several transmitted images are presented and appear quite consistent with the original.

Paper Details

Date Published: 26 October 2004
PDF: 8 pages
Proc. SPIE 5559, Advanced Signal Processing Algorithms, Architectures, and Implementations XIV, (26 October 2004); doi: 10.1117/12.554875
Show Author Affiliations
Yvon M. Erhel, Ctr. de Recherches des Ecoles de Coetquidan (France)
Clency Perrine, Univ. de Rennes I (France)
Dominique Lemur, Univ. de Rennes I (France)
Alain Bourdillon, Univ. de Rennes I (France)

Published in SPIE Proceedings Vol. 5559:
Advanced Signal Processing Algorithms, Architectures, and Implementations XIV
Franklin T. Luk, Editor(s)

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