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It's too bad that we cannot do this as a single global shared and provably neutral type of system. In the spirit of the US-USSR cooperation with Apollo-Soyuz. M
by emchammer 2y ago
It's too bad that we cannot do this as a single global shared and provably neutral type of system. In the spirit of the US-USSR cooperation with Apollo-Soyuz. Most of the rival geo-navigation constellations operate on more or less the same frequencies and coordinate their chip codes. It works but it also raises the noise floor for everybody.
- lxgr 2y agoIf you can demodulate the signals, they're not noise! That technique is called SIC (successive interference cancellation). Basically, you start with the strongest one, demodulate it, subtract it from the source signal (which removes it as a noise component), rinse and repeat. Besides that, the benefit of having more satellites available in difficult geometric arrangements (urban canyons, steep valleys etc.) most likely more than makes up for the slightly decreased SNR in situations where you can view "too many" satellites at once, to say nothing of the additional operational redundancy.