In-Vehicle NLOS Pedestrian Detection System using Secondary Radar based on Frequency Doubling and Oversampling Signal Analysis

Satomi Masuda; Zhou Zhongqi; Maiko Kitamura; Mao Morishita; Kunihisa Jitsuno; Keizo Inagaki; Atsushi Kanno; Tetsuya Kawanishi

doi:10.1587/comex.2022XBL0085

This article has now been updated. Please use the final version.

In-Vehicle NLOS Pedestrian Detection System using Secondary Radar based on Frequency Doubling and Oversampling Signal Analysis

Satomi Masuda, Zhou Zhongqi, Maiko Kitamura, Mao Morishita, Kunihisa Jitsuno, Keizo Inagaki, Atsushi Kanno, Tetsuya Kawanishi

Author information

Satomi Masuda
School of Fund. Sci. & Eng., Waseda University Japan Graduate School of Engineering, Nagoya Institute of Technology
Zhou Zhongqi
School of Fund. Sci. & Eng., Waseda University Japan Graduate School of Engineering, Nagoya Institute of Technology
Maiko Kitamura
School of Fund. Sci. & Eng., Waseda University Japan Graduate School of Engineering, Nagoya Institute of Technology
Mao Morishita
School of Fund. Sci. & Eng., Waseda University Japan Graduate School of Engineering, Nagoya Institute of Technology
Kunihisa Jitsuno
School of Fund. Sci. & Eng., Waseda University Japan Graduate School of Engineering, Nagoya Institute of Technology
Keizo Inagaki
National Institute of Information and Comms. Tech.
Atsushi Kanno
National Institute of Information and Comms. Tech.
Tetsuya Kawanishi
School of Fund. Sci. & Eng., Waseda University Japan Graduate School of Engineering, Nagoya Institute of Technology

Keywords: Secondary radar, frequency doubler, non-line-of-sight, pedestrians detection, oversampling

JOURNAL FREE ACCESS Advance online publication

Article ID: 2022XBL0085

DOI https://doi.org/10.1587/comex.2022XBL0085

The final version of this article is now available: Vol. 11 (2022), No. 9 pp. 560-565

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Abstract

Detecting signals in areas where there are many obstacles, such as Non-Line-of-Sight (NLoS) is difficult, in conventional radar systems. In this study, we investigated a radar system for detecting pedestrians in NLoS using a secondary radar system and oversampling of the received waveform in an on-board device; then, measured the range and direction detection properties. We analyzed the results of these experiments that were measured in a large anechoic chamber with metal walls to emulate NLoS conditions. The direction of the target in the NLoS was successfully detected. The proposed scheme was able to measure the distance to the target within an error margin of 5 m.

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