Hybrid TW-TOA/TDOA Positioning Algorithms for Cooperative Wireless Networks
Paper in 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

Author

Mohammad Reza Gholami

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Sinan Gezici

Bilkent University

Erik Ström

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Mats Rydström

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

IEEE International Conference on Communications

15503607 (ISSN)

5962647
978-1-61284-233-2 (ISBN)

Areas of Advance

Information and Communication Technology

Subject Categories

Signal Processing

DOI

10.1109/icc.2011.5962647

ISBN

978-1-61284-233-2

More information

Latest update

1/3/2024 9