Modeling PN Modulation In-Car Laser Radar for Range and Velocity Measurement

DOI

10.2991/iccmcee-15.2015.87How to use a DOI?

Keywords

Laser Radar; PN modulation;FFT;. correlation function.

Abstract

A novel algorithm for range and velocity measurement in Pulse Doppler Laser Radar was proposed in this paper. We used pseudo-random code to modulate the 1.55 m continuous laser in the laser Radar transmitter firstly, and then different detection method was utilized for sensing target range and target velocity. While our algorithm employed direction detection method to obtain the target range, coherence detection method was used to get the target speed simultaneously in the Laser Radar receiver. Compared to previous method, our method modulate CW laser with pseudonoise (PN) code directly. Target range is obtained by calculating the cross correlation function between the PN Code and the echo signal of direct detection, and FFT is used on the echo signal of coherence detection directly to calculate the Doppler frequency. The maximum measurable speed can be increased to 240km/h by this way. Moreover, the length of the transmitted signal is several microseconds, which make the possibility of realizing a high scanning speed in automotive applications.

Copyright

© 2015, 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  - ShiWei Li
AU  - XiangCheng Chen
AU  - XueSong Mao
PY  - 2015/11
DA  - 2015/11
TI  - Modeling PN Modulation In-Car Laser Radar for Range and Velocity Measurement
BT  - Proceedings of the 2015 4th International Conference on Computer, Mechatronics, Control and Electronic Engineering
PB  - Atlantis Press
SP  - 458
EP  - 467
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccmcee-15.2015.87
DO  - 10.2991/iccmcee-15.2015.87
ID  - Li2015/11
ER  -