On-Frequency Gap-Filler using Adaptive Tracking Null Controller for Next Generation Mobile Satellite Communication Systems

Conference: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
09/11/2005 - 09/14/2005 at Berlin, Germany

Proceedings: PIMRC 2005

Pages: 5Language: englishTyp: PDF

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Yoshida, Tomihiko; Kobayashi, K.; Ohata, K.; Ueba, M. (NTT Access Network Service Systems Laboratories, NTT Corporation, 1-1 Hikarinooka, Yokosuka, Kanagawa, 239-0847, Japan)

We propose a simple configuration, low coupling gap-filler that can re-transmit signals at the same frequency in which they were received to enhance service areas for next-generation satellite communication networks. To suppress coupling between the receiving and transmitting antennas, this gap-filler uses two transmitting antennas that form a null in the direction of the receiving antenna by controlling the amplitude and phase of one transmitting antenna. Results of simulations and field experiments show that the proposed on-frequency gap-filler is feasible and can greatly suppress coupling.