Reduction of relative positioning error and interference suppression in wireless OFDM based cellular networks

Localization of a mobile station (MS) in a cellular network is performed using multicarrier transmission for orthogonal frequency division multiplexing (OFDM)-based cellular networks. In this paper, we propose a multicarrier (MC)-based positioning system for Orthogonal Frequency Division Multiplexing (OFDM)-based cellular networks such as WiMAX or future 4G system together with a novel localization protocol that is optimized for this system A positioning system is proposed where the relative positioning and interference suppression is reduced compared to the previous methods. A localization protocol is defined in which four positioning methods are analyzed. For achieving this Cramer-Rao Lower Bound (CRLB) is implemented and the paper demonstrates the enhanced performance of Best linear unbiased estimator (BLUE) based algorithms to implement the proposed methods when locating a mobile station using cellular base stations.