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Positioning Algorithms for Cooperative networks in the presence of an unknown Turn-around time

Mohammad Reza Gholami (Institutionen för signaler och system, Kommunikationssystem) ; Sinan Gezici ; Erik G. Ström (Institutionen för signaler och system, Kommunikationssystem) ; Mats Rydström (Institutionen för signaler och system, Kommunikationssystem)
The 12th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) p. 166-170. (2011)
[Konferensbidrag, refereegranskat]

This paper addresses the problem of single node positioning in cooperative network using hybrid two-way time-of-arrival and time-difference-of-arrival where, the turn-around time at the target node is unknown. Considering the turn-around time as a nuisance parameter, the derived maximum likelihood estimator (MLE) brings a difficult global optimization problem due to local minima in the cost function of the MLE. To avoid drawbacks in solving the MLE, we obtain a linear two-step estimator using non-linear pre-processing which is algebraic and closed-form in each step. To compare different methods, Cramer-Rao lower bound (CRLB) is derived. Simulation results confirm that the proposed linear estimator attains the CRLB for sufficiently high signal-to-noise ratios.

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Denna post skapades 2011-04-06. Senast ändrad 2012-04-11.
CPL Pubid: 138693


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Institutionen för signaler och system, Kommunikationssystem (1900-2017)


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Chalmers infrastruktur