The effects of mobile radio channel bandwidth reduction on spectrum usage

The paper discusses the implications of channel splitting and examines the objections which have been raised against reducing channel widths below 25 kHz. It shows that, although the intermodulation products multiply in number, with suitable planning procedures the increase, if anything, tends to improve the choice of frequencies to be allocated. This is particularly so in the case of two frequency operation. Reuse is examined in relation to various layout configurations and shows clearly that spectrum efficiency is improved as bandwidths are reduced.