A double phase sweeping system for diversity reception in mobile radio

Fading due to multi-path propagation is a serious problem in mobile radio communications. Consideration is given to the theory of an effective means for combining the signals from a twin antennae space diversity arrangement using phase sweeping in opposite directions for the two antennae. An analysis is presented for various modulation methods. The resulting system should be compatible with existing receivers. Some experimental results for acommercial v.h.f. a.m. system are included.