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Image transmission through ionospheric channel

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4 Author(s)
Erhel, Y.M. ; Centre de Recherches des Ecoles de Coetquidan-St.-Cyr, Guer, France ; Perrine, C. ; Lemur, D. ; Bourdillon, A.

An operational system for image transmission through the ionospheric channel is presented. For a range of 780 km, the 'high' data transfer rate attains 30 kbits/s in a 9 kHz bandwidth with the implementation of a blind spatio-temporal equalisation based on the constant modulus algorithm. This value significantly exceeds the current standard for HF modems (4.8 kbits/s). The quality of the transmitted images appears to be good compared with the original.

Published in:

Electronics Letters  (Volume:41 ,  Issue: 2 )