Design and Implementation of True Random Noise Radar System

Min, Woo-Ki; Kim, Cheol-Hoo; Lukin, Constantin A.; Kim, Jeong-Phill

doi:2009.9.3.130

J. Electromagn. Eng. Sci > Volume 9(3); 2009 > Article

Journal of the Korean Institute of Electromagnetic and Science 2009;9(3):130-140.
DOI: https://doi.org/10.5515/JKIEES.2009.9.3.130

Design and Implementation of True Random Noise Radar System

Woo-Ki Min¹, Cheol-Hoo Kim¹, Constantin A. Lukin², Jeong-Phill Kim¹

¹School of Electrical and Electronics Engineering, Chung-Ang University
²LNDES, IRE NASU

Abstract

The design theory and experimental results of a true random noise radar system are presented in this paper. Target range information can be extracted precisely by correlation processing between the delayed reference and the signal received from a target, and the velocity information by the Doppler processing with successive correlation data. A K-band noise radar system was designed using random FM noise signal, and the characteristics of the fabricated system were examined with laboratory and outdoor experiments. A C-band random FM noise signal was generated by applying a low-frequency white Gaussian noise source to VCO(Voltage Controlled Oscillator), and a K-band Tx noise signal with 100 MHz bandwidth was obtained by using a following frequency multiplier. Two modified wave-guide horn arrays were designed and fabricated, and used for the Tx and Rx antennas. The required amount of Tx/Rx isolation was attained by using a coupling cancellation circuit as well as keeping them apart with predetermined spacing. A double down-conversion scheme was used in the Rx and reference channels, respectively, for easy post processing such as correlation and Doppler processing. The implemented noise radar performance was examined with a moving bicycle and a very high-speed target with a velocity of 150 m/s. The results extracted by the Matlab simulation using the logging data were found to be in a reasonable agreement with the expected results.

Key words: Noise Radar, True Random Signal, Correlation, FFT, Range, Doppler, LPI, Ambiguity