Research on Laser Ranging System Based on Time Delay Estimation

Author

Xu Wei ; Chen Qian ; Gu Guo-hua

Author_Institution

Ministerial Key Lab. of JGMT, Nanjing Univ. of Sci. & Technol., Nanjing, China

fYear

2011

fDate

16-18 May 2011

Firstpage

1

Lastpage

3

Abstract

This paper provides a method for direct detection time-of-flight (TOF) laser ranging system based on time delay estimation to get higher precision than conventional ranging systems. Restricted by the conversion rate of Analog-to-Digital (ADC) CMOS chip while the laser echo signal is so narrow, the precision of the laser ranging system is restricted no more than the ADC sampling period. As this problem is considered, multi-channel cross correlation time delay estimation with linear fitting correction is devised. The technique is shown here to be more precise and the experimental results demonstrate the effectiveness of the proposed method.

Keywords

CMOS integrated circuits; analogue-digital conversion; delays; echo; laser ranging; optical information processing; analog-to-digital CMOS chip; direct detection time-of-flight laser ranging; laser echo signal; linear fitting correction; multichannel cross correlation time delay estimation; Correlation; Delay effects; Distance measurement; Estimation; Fitting; Measurement by laser beam; Receivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics and Optoelectronics (SOPO), 2011 Symposium on

Conference_Location

Wuhan

ISSN

2156-8464

Print_ISBN

978-1-4244-6555-2

Type

conf

DOI

10.1109/SOPO.2011.5780683

Filename

5780683