An experimental UHF dual-diversity receiver using a pre-detection combining system

The use of diversity reception has often been suggested as a means of overcoming multipath fading in mobile radio propagation, and various combining schemes have been used. An experimental 836 MHz dual channel, space diversity receiver has been built which brings to a common phase and combines two independent signals using a scheme of phase equalizing by multiple heterodyning. This paper describes the system and propagation tests using unmodulated carriers.