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- W59090855 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 transmitting and real-time videoconferencing. Very high rates are required compared to the standard modems.Therefore, an array processing is performed with a set of antennas whose spatial response differs from one another arranged in a circular array or in a collocated sensor. Synchronization (Zero CrossingDetector) and source separation (LMS algorithm) resort to classical well-tested techniques involving training sequences. Experimental results are presented for both antenna configurations. These techniques improve data rate, reaching 20 kbits/s within the 6 kHz bandwidth (QAM 64) withoutcoding or interleaving." @default.
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- W59090855 date "2009-12-18" @default.
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- W59090855 title "A way to increase the bit ratein ionospheric radio links" @default.
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- W59090855 doi "https://doi.org/10.4401/ag-3291" @default.
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