Multi-frequency tuning technique for distributed sensor localization

In this paper, we propose a novel angle of departure (AOD) aided sensor localization algorithm. Through the multiple frequency tuning technique at a fixed-spaced two-antenna anchor node, a non-uniform linear array can be rebuilt at each ground sensor node. We convert the angle estimation into a real number reconstruction by Chinese remainder theorem (CRT) and then provide a new algorithm to solve the congruence problem. Compared with the conventional spectral searching algorithms, the proposed one is computationally efficient and also performs much better than other CRT reconstruction algorithms. The validity and the advantages of the proposed algorithm is proved by numerical simulations.