|
|
|
|
|
|
by jrockway
4353 days ago
|
|
|
Ah, I'm just surprised that buildings ended up mattering when you were deciding between 150MHz or 900MHz. While people like to complain about the frequency getting higher and propagation dropping off (especially related to 2.4GHz and 5GHz wifi), I haven't found a good paper that guarantees that's the case. Anecdotally, I can receive a 5GHz signal in my office in Manhattan from a radar in Floyd Bennett Field, 12 miles away, with buildings in the way. Similarly, inside my apartment, I have much better luck with 440MHz radio communication than 144MHz communication. (Ground floor, so not that great either way.) Being limited to 4W EIRP in the 900MHz ISM band probably played more of a role? Anyway, you might want to find these guys: https://news.ycombinator.com/item?id=7981431 The combination of your product with their technology could be quite interesting. Also, follow up question: does your protocol attempt to recover signals from below the noise floor? |
|
|