Hybrid TW-TOA/TDOA Positioning Algorithms for Cooperative Wireless Networks
Paper i proceeding, 2011

The problem of positioning an unknown target is studied for a cooperative wireless sensor network using hybrid two-way time-of-arrival and time-difference-of-arrival measurements. A maximum likelihood estimator (MLE) can be employed to solve the problem. Due to the non-linear nature of the cost function in the MLE, a numerical method, e.g., an iterative search algorithm with a good initial point, should be taken to accurately estimate the target. To avoid drawbacks in a numerical method, we instead linearize the measurements and obtain a new two-step estimator that has a closed-form solution in each step. Simulation results confirm that the proposed linear estimator can attain Cram\'er-Rao lower bound for sufficiently high SNR.

wireless sensor networks

linear estimator

Cooperative positioning

Författare

Mohammad Reza Gholami

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Sinan Gezici

Bilkent Universitesi

Erik Ström

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Mats Rydström

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

IEEE International Conference on Communications

05361486 (ISSN)

5962647

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Signalbehandling

DOI

10.1109/icc.2011.5962647

ISBN

978-1-61284-233-2

Mer information

Skapat

2017-10-07