Bistatic noise radar: Demonstration of correlation noise suppression

Abstract

In this study, spatial separation of the radar transmitter and receiver units is considered, as a means of reducing the masking effect in noise radars. A bistatic radar system is constructed, with emphasis on a lightweight transmitter unit that can be mounted on a commercial Unmanned Aerial Vehicle (UAV). The system uses pseudo-random noise, generated digitally at the receiver and transmitter units. Correlation losses, due to nonlinearities in the transmitter and receiver units, are measured to 0.1 dB. This study shows that by separating the transmitter and receiver unit the masking effect is significantly reduced, compared to a monostatic setup. This reduction is enough for the system to detect a slow flying UAV. Thus, bistatic separation should be considered as a practical tool to reduce the masking effect. By processing clutter with an extended CLEAN algorithm, the correlation noise floor is further suppressed.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Long-Range Entangled Quantum Noise Radar Over Order of Kilometer

“…Thanks to the correlation, in noise radars [9]- [12], one can extract and recognize the desired signal from noises by correlating the returned transmittedsignal with the reference signal, the so-called idler, at the receiver (for more information see Refs. [33], [40]). The simplified schematic of a noise radar is shown in Fig.…”

Implementation of a coherent real‐time noise radar system

“…Considering the system has a fractional bandwidth of about 19% when operating at the highest possible bandwidth of 250 MHz, true time delay might have to be considered. The improved receiver will then operate together with a bistatic noise transmitter, similar to the one described in reference [32] but with increased output power. If successful, the new bistatic system will be able to perform real-time detection of a small UAV at a distance of several kilometres.…”

“…Nevertheless, the demonstration shows that digital electronics have advanced to the point that digital high‐bandwidth real‐time noise radar processing is no longer in the future. Pairing the developed system with a bistatic transmitter [32] and performing spatial filtering [33] can extend the detection range to several kilometres ‐ this will be implemented and investigated in the future.…”