Improvement and Research of Multipath Time Delay Estimation Algorithm for Ship-borne Aviation Navigation Positioning Signals

DOI

10.2991/mce-14.2014.11How to use a DOI?

Keywords

ship-borne; aviation navigation; multipath time delay; estimation; IFFT

Abstract

The ship-borne aviation navigation positioning system usually receives superposed signals of the direct signal and multipath signal. Since the direction of arrival of multipath signal and the multipath time delay parameters vary with the ship attitude and sea environment time-variation, the angle and distance navigation parameters provided by the system often deviate from the accurate value. Based on study of inverse fast Fourier transformation (IFFT) time delay estimation method based on spectrum division technology, with the fact that the aviation navigation positioning signal transceiver is known and the characteristic of concentrated energy, considering that the low SNR useful signal will be submerged in the noise spectrum after spectrum division, by introducing the cross-power spectrum instead of the spectrum to add a compensation factor to offset out-of-band noise impact, a new improved signal time delay estimation algorithm is presented. Simulation shows that under the condition of low SNR (signal-to-noise ratio), it can better restore the signal wave pattern received by the system, so that we can effectively estimate the multipath time delay for ship-borne aviation navigation positioning signals.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Hongsen Xie
AU  - Peng Zhou
AU  - Weijun Chen
AU  - Baokuan Luan
PY  - 2014/03
DA  - 2014/03
TI  - Improvement and Research of Multipath Time Delay Estimation Algorithm for Ship-borne Aviation Navigation Positioning Signals
BT  - Proceedings of the 2014 International Conference on Mechatronics, Control and Electronic Engineering
PB  - Atlantis Press
SP  - 48
EP  - 52
SN  - 1951-6851
UR  - https://doi.org/10.2991/mce-14.2014.11
DO  - 10.2991/mce-14.2014.11
ID  - Xie2014/03
ER  -