Recent developments in mobile radio in britain

The paper outlines briefly the development of v.h.f. mobile radio in Great Britain, its past history, its present development, and its future planning. The predominant use of amplitude modulation is discussed, particularly in relation to the introduction of 25 kc/s channel spacing which is now being used. Equipment has also been developed to work on channel spacings as close as 12.5 or 15 kc/s. Future trends and the possibility of introducing single-sideband with or without carrier, are briefly discussed.