Title :
A TDOA location scheme in OFDM based WMANs
Author :
Ni, Hao ; Ren, Guangliang ; Chang, Yilin
Author_Institution :
State key Lab. of ISN, Xidian Univ., Xidian
fDate :
8/1/2008 12:00:00 AM
Abstract :
A time difference of arrival (TDOA) location scheme for the orthogonal frequency division multiplexing (OFDM) based wireless metropolitan area networks (WMANs) is presented. A novel TDOA estimation algorithm for OFDM signals is proposed and adopted in this scheme. The algorithm enhances the location performance by utilizing the information in the time and frequency domains obtained from the received location OFDM signals. The simulations are implemented with an 802.16e configuration considering an outdoor wireless scenario. The simulation results show that the scheme can meet the E911 requirements in even complex multipath channel conditions, and outperform the location schemes with traditional correlation detection TDOA estimations.
Keywords :
OFDM modulation; metropolitan area networks; multipath channels; packet radio networks; time-of-arrival estimation; wireless channels; IEEE 802.16e configuration; OFDM signals; TDOA estimation algorithm; WMAN; correlation detection; multipath channel conditions; orthogonal frequency division multiplexing; outdoor wireless scenario; time difference-of-arrival location scheme; wireless MAN; wireless metropolitan area networks; Costs; Frequency domain analysis; Global Positioning System; Laboratories; Metropolitan area networks; Multiaccess communication; OFDM; Signal resolution; Time difference of arrival; Wireless LAN; Orthogonal frequency division multiplexing (OFDM), location based services (LBS), Wireless Metropolitan Area Networks (WMANs), TDOA estimation;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2008.4637581
