Optical ranging and communication method based on all-phase FFT

Zening Li; Gang Chen

doi:10.1117/12.2064018

3 October 2014 Optical ranging and communication method based on all-phase FFT

Zening Li, Gang Chen

Proceedings Volume 9224, Laser Communication and Propagation through the Atmosphere and Oceans III; 922419 (2014) https://doi.org/10.1117/12.2064018
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

This paper describes an optical ranging and communication method based on all-phase fast fourier transform (FFT). This kind of system is mainly designed for vehicle safety application. Particularly, the phase shift of the reflecting orthogonal frequency division multiplexing (OFDM) symbol is measured to determine the signal time of flight. Then the distance is calculated according to the time of flight. Several key factors affecting the phase measurement accuracy are studied. The all-phase FFT, which can reduce the effects of frequency offset, phase noise and the inter-carrier interference (ICI), is applied to measure the OFDM symbol phase shift.

Citation Download Citation

Zening Li and Gang Chen "Optical ranging and communication method based on all-phase FFT", Proc. SPIE 9224, Laser Communication and Propagation through the Atmosphere and Oceans III, 922419 (3 October 2014); https://doi.org/10.1117/12.2064018

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