Urban canyons will be properly solved by using small phased array antennas for GPS reception. Then one can detect which signals are coming from the wrong direction and therefore must be reflections.
Phased array antennas also allow GPS-based compasses which should be far better than magnetic compasses which can be rather inaccurate.
Such phased array antennas are already coming into use for more throughput for 5G and WiFi use, and antenna sharing is feasible although not currently done commonly.
Phased array antennas also allow GPS-based compasses which should be far better than magnetic compasses which can be rather inaccurate.
Such phased array antennas are already coming into use for more throughput for 5G and WiFi use, and antenna sharing is feasible although not currently done commonly.