"That's part of the reason 5G is such an issue, despite the ostensibly-large guard band." As I keep repeating here, if excessive or debilitating interference i

"That's part of the reason 5G is such an issue, despite the ostensibly-large guard band." As I keep repeating here, if excessive or debilitating interference is being experienced between services under normal operating conditions then there has been a failure of Spectrum Management planning - absolutely no question about it. OK, we know such interference has happened, so who was responsible for the planning fuck-up? I've no argument about filters, RFI etc., what most are saying about the engineering issues makes sense. My argument is that the spectrum planning has failed and that much of the reason can be put down to deregulation in the 1980s when many governments essentially washed their hands of Spectrum Management (succumbed to commercial pressures and overly loosened engineering standards and now we're paying the penalty). It seems to me (given the international nature of the problem with non-US registered aircraft flying into US airspace, etc.) that we need to go back to the core of the problem and acknowledge these past 'regulations' errors before the problem can be fixed properly. Perhaps all radar altimeters will have to be changed (respecified with much tighter filters, better intermod figures, etc.) but given the fuck-up who should pay? After all, it's not the FAA's fault nor that of the aircraft industry (see my comments in other posts about the ITU and WRC). As I see it, this is a political issue, not a technical one.