Lee Gomes writes in Monday’s Wall Street Journal about the “open spectrum” movement. For many years, largely because of the limitations of receivers, spectrum had to be allocated carefully to prevent interference. Those days are just about gone.
Paul Baran began talking about this subject many years ago. Here’s one link to a talk he gave at Rutgers in 1994 with the subtitle “Is the Shortage of Radio Spectrum for Broadband Networks of the Future a Self Made Problem?”