Adaptive slow frequency-hopping system for land mobile radio

The essential features of a novel adaptive slow frequency-hopping system are described. It is proposed that the system would operate in the heavily congested VHF private mobile radio bands by selecting currently inactive channels, hence increasing the overall spectral efficiency. A preliminary analysis of mutual interference is presented in full, the results of which indicate that a frequency-hopping system with a viable capacity could coexist with conventional private mobile radio networks.