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Proceedings Paper

Modulated laser radar decoding by inter symbol interference
Author(s): Xuesong Mao; Daisuke Inoue; Hiroyuki Matsubara; Manabu Kagami
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Paper Abstract

Pseudo Random Noise (PN) coded laser radar can improve the target detection ability without the demand on high power laser. However, the reflected echoes are generally so weak that they are buried in the thermal noise of the receiver, which raises the problem of choosing an optimal threshold for correctly decoding them since the power of echoes varies from time to time, and the voltage of light generated electrical signal by photo diode (PD) is always positive. In this work, we firstly show the problem we are going to discuss. Then, a novel method basing on Inter Symbol Interference (ISI) is proposed for solving the problem. Next, numerical simulations and experiments are performed to validate the method. Finally, we discuss the obtained results theoretically.

Paper Details

Date Published: 21 February 2011
PDF: 8 pages
Proc. SPIE 7923, Free-Space Laser Communication Technologies XXIII, 79230A (21 February 2011); doi: 10.1117/12.873148
Show Author Affiliations
Xuesong Mao, Toyota Central Research and Development Labs., Inc. (Japan)
Daisuke Inoue, Toyota Central Research and Development Labs., Inc. (Japan)
Hiroyuki Matsubara, Toyota Central Research and Development Labs., Inc. (Japan)
Manabu Kagami, Toyota Central Research and Development Labs., Inc. (Japan)


Published in SPIE Proceedings Vol. 7923:
Free-Space Laser Communication Technologies XXIII
Hamid Hemmati, Editor(s)

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