Robust RSSD Source Localization in NLOS Conditions With Random System Parameter Errors

Passive energy based source positioning methods are of great interest due to their low cost and simplicity. In this letter, source localization with unknown transmit power in a non line-of-sight (NLOS) environment is considered based on received signal strength difference (RSSD) measurements. An efficient two stage estimator is developed based on a nonlinear energy based measurement model for bounded location estimation errors with system parameters perturbed by random errors. Results are presented which show the proposed approach to model parameter errors is robust for sufficiently large signal to noise ratios.