Wireless communication networks have been evolving, and the most advanced and widely deployed wireless communications networks include IEEE 802.16e-based WiMAX. In this work, RF fingerprinting-based location determination techniques are proposed. The techniques are designed to be used in the 4G mobile WiMAX network. The 4G WiMAX networks have merits in providing better wireless positioning over other wireless networks in the following regard. The RF fingerprinting in WiMAX is challenging because of the signal measurement variation and data misses. The techniques presented in this work are robust in the sense that they can work in spite of the low measurement quality. The proposed techniques also include the automatic RF fingerprint generation for the unvisited areas in the radiomap. The rest of the paper is structured as follows: In Section 2, existing location determination techniques in 4G and non-4G networks are described and compared with 4G-WiMAXbased techniques. In Section 3, the proposed system is outlined, and in Section 4, the proposed techniques are detailed. In Section 5, the results of the evaluation of the proposed techniques on live mobile WiMAX networks are presented.
In Section 6, the techniques are summarized and discussed, and the on-going works are introduced.