2 ms·
I might have missed it just skimming, but what's the physical method they are planning to use for return channel?
by giantg2 2y ago
I might have missed it just skimming, but what's the physical method they are planning to use for return channel?
- lxgr 2y agoApparently there are two options: An existing Internet connection, or actually receivers transmitting back to the broadcast tower – which sounds crazy, but the specification [1] says it can work over up to 100 kilometers with line-of-sight...? Then again, thanks to modern modulation techniques, digital steering etc., battery-powered smartphones can talk to satellites 36 thousand kilometers away these days as well, so maybe this is just a thing now? The spec also does mention receive repeaters for complicated non-line-of-sight propagation scenarios. [1] https://www.atsc.org/wp-content/uploads/2024/04/A323-2024-04-Dedicated-Return-Channel.pdf https://www.atsc.org/wp-content/uploads/2024/04/A323-2024-04...