Received Signal Strength-Based Wireless Source Localization With Inaccurate Anchor Positions

Abstract

Received signal strength (RSS)-based wireless localization is easy to implement at low cost. In practice, exact positions of anchors may not be available. This article focuses on determining the location of a source in the presence of inaccurate positions of anchors based on RSS directly. We first use Taylor expansion and a min–max approach to get a maximum likelihood estimator of the coordinates of the source. Then we propose a relaxed semidefinite programming model to circumvent the nonconvexity. We also propose a rounding algorithm considering both inaccurate source locations and inaccurate anchor locations. Simulation results together with analysis are presented to validate the proposed method.