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2016, Volume 17, Issue 10

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Frontiers of Information Technology & Electronic Engineering >> 2016, Volume 17, Issue 10 doi: 10.1631/FITEE.1500417

Anenhanced mixedmodulated Lagrange explicit time delay estimator with noisy input

. School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.. Department of Electrical and Computer Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA

Available online: 2016-11-04
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Abstract

The mixed modulated Lagrange explicit time delay estimation (MMLETDE) algorithm provides an efficient time delay estimation between narrowband or sinusoidal signals. However, it does not explicitly consider the additive measurement noise at the input, which actually exists in practice. Aiming at this issue, an enhanced MMLETDE algorithm is proposed for noisy inputs based on the unbiased impulse response estimation technique, assuming that the noise power ratio is known a priori. Simulation results show that for narrowband signals or sinusoids over a wide frequency range, the proposed algorithm with a small filter order performs well in moderate and high noise scenarios.

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