“E-band is part of the generic “millimetre wave” spectrum that stretches from 30GHz to 300GHz with wavelengths from one to 10 millimetres. […] E-band is generally taken to mean frequencies from 60 GHz to 90GHz (wavelenghths of 3.3 to 5mm). […] French ”fibre through the air” vendor Bluwan has a lot of experience in millimetre wave technology, but has chosen the 40.5-43.5 GHz band for its commercial offerings. “This has simi lar transmission characteristics to E-band but chipset technology allows point-to-multipoint backhaul applications with better performance”, says Bluwan’s chief commercial officer Shayan Sanyal.”
He discusses the need for harmonised spectrum regulation across the globe and highlights that operators need to find a balance between utilising multi-gigabit capacity and rising capex and opex costs.
“E-band is stil invariably expensive. Issues include the lack of harmonised licensing regimes, equipment cost, and the fact that with increased network densification, the opex impact of point-to-point solutions, whether millimetre wave based or not, is constraining mobile operators’ time to market. […] Operators who are focused on opex are increasingly turning to point-to-multipoint solutions [PMP], looking for the right balance between multi-gigabit sector capacity and site throughput as well as opex cost reduction.”
He concludes by citing Bluwan’s LinkFusion technology as one of the solutions that can provide the right balance between high capacity and flexible deployment whilst also minimising total cost of ownership.
“Sanyal claims that millimetre wave PMP in the 42GHz band can offer this balance. Q-band systems, such as Bluwan’s LinkFusion, are based on a transmission hub that connects to lightweight terminals. The hub includes eight to 16 TDD compact wideband modems that are multiplexed on 1GHz IF (intermediate frequency) bandwidth.”
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