ORIGINAL: Sport_Pilot
That bw simply isn't available in the part of the RFspectrum allocated to us between a couple TVbroadcast channels (72 MHz).
The article isn't about staying at 72 Mhz either. It is pushing for a whole new set of frequencies. However, while sperad sprectrum may or may not be viable for 72 Mhz, frequency hopping would. But that was not what the article was about. The issue is how busy the 2.4 spectrum is or soon will be. Lots of stuff coming so need to start pushing for this now.
The basis for author's argument against 2.4 GHz is so basically flawed as to provide no sensible rationale for moving to a whole new set of frequencies or for that matter changing anything else.
Frequency hopping is simply one technique used to implement SS. The 72 Mhz band allocated to R/Cis about 1 MHz wide, just enough to accomodate the existing channels. My Spektrum radio can choose to operate anywhere in a 1 Mhz band - its choice based on the noise environment it sees, not mine. As Isaid, SS(including frequency hopping) requires redundant data transmission, ergo more bandwidth, or time (that's where the latency issue comes in, inextricably linked but a whole topic of its own). Where is that additional bw going to come from? What keeps a FHR/Csystem on 72 Mhz band (or any other band) from stomping on existing users?