Area coverage in mobile radio by quasisynchronous transmissions using double-sideband diminished-carrier modulation

Problems of area coverage are reviewed, and the means of reducing interaction between quasisynchronously operated double-sideband diminished-carrier (d.s.b.d.c.) v.h.f. transmitters are considered. Carrier diminution and relative sideband phasing are shown to play an important role. Experimental results are given for a d.s.b.d.c.v.h.f. mobile radio system. The performance of a single transmitter is compared with that of three transmitters operated quasisynchronously. The superior coverage of the latter system is marked