Novel Wireless Positioning System for OFDM-Based Cellular Networks

作者：Zhao, Guannan^*; Wang, Donglin; Fattouche, Michel; Jin, Minglu

来源：IEEE Systems Journal, 2012, 6(3): 444-454.

DOI：10.1109/JSYST.2012.2183031

• Best linear unbiased estimator (BLUE)
• Cramer-Rao lower bound (CRLB)
• multicarrier transmission
• positioning error covariance matrix (PECM)
• positioning system

Time-based localization of a mobile station (MS) in a cellular network is usually performed by utilizing a pseudonoise transmission and a range difference-based positioning protocol. In this paper, we propose a novel positioning system using multicarrier transmission for orthogonal frequency division multiplexing-based cellular networks. For this system, a novel localization protocol is presented in which we propose four possible positioning methods to be analyzed and compared in conjunction with the novel protocol. Toward this goal, a unified CrameRao lower bound (CRLB) is derived theoretically for all four methods. We also use best linear unbiased estimator (BLUE)based algorithms to implement the proposed methods when locating a MS using cellular base stations. Their performance is discussed and compared in terms of the positioning error covariance matrix (PECM). Theoretical analysis is provided in the paper which demonstrates that BLUE-based location methods can approach the CRLB asymptotically under some conditions and that our positioning protocol has a better localization accuracy than either a range-based positioning protocol or a range difference-based one with respect to PECM. Finally, this paper verifies its theoretical findings by simulation.

• 出版日期2012-9
• 单位大连理工大学