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Accuracy limits of distance estimation in visible light systems with RGB LEDs
(IEEE, 2019-09)
The distance estimation problem is investigated for visible light positioning (VLP) systems with red-green-blue (RGB) light emitting diodes (LEDs). The accuracy limits on distance estimation are calculated in terms of the ...
Optimal detector randomization in cognitive radio systems in the presence of imperfect sensing decisions
(2014)
In this study, optimal detector randomization is developed for secondary users in a cognitive radio system in the presence of imperfect spectrum sensing decisions. It is shown that the minimum average probability of error ...
Power adaptation for cognitive radio systems under an average sinr loss constraint in the absence of path loss information
(Kluwer Academic Publishers, 2014)
An upper bound is derived on the capacity of a cognitive radio system by considering the effects of path loss and log-normal shadowing simultaneously for a single-cell network. Assuming that the cognitive radio is informed ...
Average capacity maximization via channel switching in the presence of additive white Gaussian noise channels and switching delays
(Institute of Electrical and Electronics Engineers Inc., 2016)
The optimal channel switching problem is studied for average capacity maximization in the presence of additive white Gaussian noise channels and channel switching delays. First, an optimization problem is formulated for ...
Optimal jammer placement in wireless localization systems
(Institute of Electrical and Electronics Engineers Inc., 2016)
In this study, the optimal jammer placement problem is proposed and analyzed for wireless localization systems. In particular, the optimal location of a jammer node is obtained by maximizing the minimum of the Cramér-Rao ...
Statistics of the MLE and approximate upper and lower bounds-Part I: Application to TOA estimation
(Institute of Electrical and Electronics Engineers Inc., 2014)
In nonlinear deterministic parameter estimation, the maximum likelihood estimator (MLE) is unable to attain the Cramér-Rao lower bound at low and medium signal-to-noise ratios (SNRs) due the threshold and ambiguity phenomena. ...
Statistics of the MLE and approximate upper and lower bounds-part II: Threshold computation and optimal pulse design for TOA estimation
(Institute of Electrical and Electronics Engineers Inc., 2014)
Threshold and ambiguity phenomena are studied in Part I of this paper where approximations for the mean-squared error (MSE) of the maximum-likelihood estimator are proposed using the method of interval estimation (MIE), ...
Maximization of average number of correctly received symbols over multiple channels in the presence of idle periods
(Elsevier Inc., 2016)
In this study, optimal channel switching (time sharing) strategies are investigated under average power and cost constraints for maximizing the average number of correctly received symbols between a transmitter and a ...
TW-TOA based positioning in the presence of clock imperfections
(Elsevier Inc., 2016)
This manuscript studies the positioning problem based on two-way time-of-arrival (TW-TOA) measurements in semi-asynchronous wireless sensor networks in which the clock of a target node is unsynchronized with the reference ...
Optimal power allocation for average detection probability criterion over flat fading channels
(Institute of Electrical and Electronics Engineers Inc., 2017)
In this paper, the problem of optimal power allocation over flat fading additive white Gaussian noise channels is considered for maximizing the average detection probability of a signal emitted from a power constrained ...