Antenna diversity with opportunistic combining for ASK systems with single channel receivers

This paper proposes the use of multiple phase shifted signal combinations per symbol without a feedback network, in order to facilitate a minimum component diversity switching technique. The proposed technique can be considered as combining N antenna configurations during each symbol. The effect of both a peak detector system and a system with an averaging detector is investigated. Simulations and measurements in both reverberation chamber and office environment are presented, supporting the use of the proposed technique in ASK systems.