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, Kommunikations- och antennsystem, Kommunikationssystem

Sinan Gezici

Bilkent Universitesi

Erik Ström

Chalmers, Signaler och system, Kommunikations- och antennsystem, Kommunikationssystem

Mats Rydström

Chalmers, Signaler och system, Kommunikations- och antennsystem, 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