A New Decision Algorithm for Audio Voting Systems

Nowadays, multiple receiver voting systems use several receivers so that at least one receiver always receives a high quality signal from portable and mobile units operating anywhere within the desired coverage area. Abstract— The voting systems appeared with the purpose of overcoming the problems of bad quality signal in radio systems or mobile phones. This technique consists of selecting among signals from several receivers based on different noisy measurement of signal quality. It allows covering the desired area with at least one receiver always receiving a high quality signal from portable and mobile units operating. Then, to maximise performance, automatic receiver selectors are crucial to select the best signal. The multiple voting receivers are installed around the service area. They can cover a large geographical area or they can be concentrated in a small (city-wide) area. Each channel in a system which is to be voted has receivers at several locations in the coverage area of the repeater transmitter. For example, if there are four channels to be voted, each channel has a receiver in each location. In this paper we present a new decision algorithm for automatic voting receiver selector implemented over a multiple site voting system. This algorithm that is being used in a commercial mobile radio system, selects the best signal in a defined mobile unit position. The key to maximise performance in multiple receiver systems is an automatic voting receiver selector that can monitor all receivers in the system and continuously select the receiver having the best signal quality. Multiple receiver systems can be either single-site or multiple-site systems.