Telecommunications: BF-OFDM rolled out in the Orkney Islands

Bringing high-speed internet access to sparsely-populated rural areas can be a challenge when you only have access to non-contiguous frequency bands—unless you have Leti’s BF-OFDM technology, that is*! Leti just rolled out the technology in Scotland’s Orkney Islands on a test basis, where it was a success. Compared to the OFDM waveforms used in 4G communications, BF-OFDM adds a pre-distortion stage and subsequent frequency filtering. In the Orkney Islands, Leti’s prototype delivered data transfer speeds of 30 Mbit/s at ranges of up to 20 km using 4 MHz channels separated by 4 MHz “blanks”. The fact that frequency bands are less and less available and increasingly fragmented makes this advance all the more significant. A telecommunications company has expressed interest in the patented technology, which is compatible with OFDM receivers.

*Block-Filtered Orthogonal Frequency Division Multiplexing

Contact: dimitri.ktenas@cea.fr

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