Abstract:

The decentralized estimation of a noise-corrupted deterministic parameter in wireless sensor networks with the aid of relay is considered. A new relayaided decentralized estimation (RADE) scheme is proposed, by which relay collects the overheard messages from sensors and sends the locally processed message to a destination. Amplify-and-forward (AF) and estimate-and-forward (EF) strategies are proposed and the corresponding closed-form solutions are derived. Numerical simulation shows the proposed strategies can provide better estimation performance without any bandwidth loss.

Key words: amplify-and-forward, estimateandforward, relayaided, decentralized estimation