Some Japanese bullet trains will soon support premium private suites this October, featuring windows with embedded 5G antennas for steadier onboard Wi-Fi and NTT noise-cancelling cabin tech to reduce train noise. The 5G window antennas are designed to maintain line-of-sight connections as trains race past base stations at up to 285 km/h. The Register reports: Rail operator JR Central announced the new tech late last month and will initially deploy a couple of the suites on six trains. The carrier explained that the antennas come from a Japanese company called AGC that weaves microscopic wires through glass to form an antenna. JR Central will connect the windows to an on-train Wi-Fi router. AGC says rival tech relies on 5G signals reaching a train and then bouncing around inside before reaching the Wi-Fi unit. The company says antennas woven into train windows maintain line of sight to nearby 5G base stations. That matters because JR Central's Shinkansen can achieve speeds of up to 285 km/h, which means they speed past cellular network base stations so quickly that it's frequently necessary to reconnect to another radio. AGC says keeping a line of sight connection means its antennas allow increased 5G signal strength, so Wi-Fi service on board trains should be more stable and speedy. The sound-deadening kit JR Central will deploy is called Personalized Sound Zone (PSZ) and comes from Japan's tech giant NTT. The tech uses the same principles applied to noise-cancelling headphones -- determine the waveform of sound and project an inversion of that waveform that cancels out ambient noise.

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