Fusion of decisions transmitted over multiple observations based relay/sensor network

A multiple observations based censored relay scheme has been proposed for a wireless sensor network. The relays in this scheme observe signals transmitted from multiple sensors and transmit decisions to the fusion center only if the likelihood ratios of the observations exceeded a predefined set of thresholds. This scheme has been shown to outperform the single observation based relay scheme in terms of the receiver operating characteristic. Due to the censoring of the relays, there is a very small probability that none of the relays will be able to transmit signal to the fusion center, and this probability has been quantified analytically. The maximum likelihood detection rule for the fusion center has also been derived.