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Title: Modified CRLB for cooperative geolocation of two devices using signals of opportunity
Authors: See, Samson Chong Meng
Razul, Sirajudeen Gulam
Win, Moe Z.
Leng, Mei
Tay, Wee Peng
Keywords: Differential Time Difference-of-arrival (DTDOA)
Asynchronous Clocks
DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2014
Source: Leng, M., Tay, W. P., See, S. C. M., Razul, S. G., & Win, M. Z. (2014). Modified CRLB for Cooperative Geolocation of Two Devices Using Signals of Opportunity. IEEE Transactions on Wireless Communications, 13(7), 3636-3649. doi:10.1109/TWC.2014.2314096
Series/Report no.: IEEE Transactions on Wireless Communications
Abstract: We consider the problem of localizing two devices using signals of opportunity from beacons with known positions. Beacons and devices have asynchronous local clocks or oscillators with unknown clock skews and offsets. We model clock skews as random, and analyze the biases introduced by clock asynchronism in the received signals. By deriving the equivalent Fisher information matrix for the modified Bayesian Cramér-Rao lower bound (CRLB) of device position and velocity estimation, we quantify the errors caused by clock asynchronism. We propose an algorithm based on differential time-difference-of-arrival (DTDOA) and frequency-difference-of-arrival (FDOA) that mitigates the effects of clock asynchronism to estimate the device positions and velocities. Simulation results suggest that our proposed algorithm is robust and approaches the CRLB when clock skews have small standard deviations.
ISSN: 1536-1276
DOI: 10.1109/TWC.2014.2314096
Schools: School of Electrical and Electronic Engineering 
Research Centres: Temasek Laboratories 
Rights: © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at:
Fulltext Permission: open
Fulltext Availability: With Fulltext
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