Doppler laser radar for range and speed measurement of road targets

Yanfang Lin; Xuesong Mao; Jianchao Fang; Tao Zhang

doi:10.1117/12.2245136

14 November 2016 Doppler laser radar for range and speed measurement of road targets

Yanfang Lin, Xuesong Mao, Jianchao Fang, Tao Zhang

Proceedings Volume 10025, Advanced Sensor Systems and Applications VII; 100250G (2016) https://doi.org/10.1117/12.2245136
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

A pulsed coherent vehicle laser radar system basing on the measurement of light flight time and Doppler frequency shift is demonstrated for the first time, which features a simple design that uses one photodiode (PD) as its optical detector. Pseudo random noise (PN) code is used for modulating the amplitude of transmitting light. Correlation function of the received echoes and the local modulating codes is calculated for measuring the light flight time. Due to PN code modulation, beat signal output from PD is piecewise continuous, which causes equidistant sampling of Doppler sine wave not feasible. In order that Doppler frequency be correctly measured by using fast Fourier transform (FFT), a simple signal amplitude modification method is derived from the definition of Fourier transform.

Citation Download Citation

Yanfang Lin, Xuesong Mao, Jianchao Fang, and Tao Zhang "Doppler laser radar for range and speed measurement of road targets", Proc. SPIE 10025, Advanced Sensor Systems and Applications VII, 100250G (14 November 2016); https://doi.org/10.1117/12.2245136

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