<title>Random noise radar interferometry</title>

Abstract

A novel technique has been developed to inject coherence in an ultrawideband radar system that transmits white Gaussian random noise. Coherence is introduced in the system by performing heterodyne correlation of the received signal with the time-delayed replica of the transmit signal. This operation preserves the phase of the reflected signal which is lost in a traditional homodyne correlation receiver. Knowledge of the phase of the received signal permits the configuration of the system as a spaced antenna interferometer for azimuthal scanning and transversal speed estimation. This paper describes the basic theory of random noise radar interferometry, and presents first results obtained using the University of Nebraska's 1-2 GHz random noise radar system configured as a radar interferometer.

Inverse synthetic aperture radar imaging using a coherent ultrawideband random noise radar system

“…These radars are relatively inexpensive to build and possess natural immunity to jamming and interference from other radar systems operating in the same theater of operations. They have been used for the measurement of range profiles, 2 Doppler estimation, 3 detection of buried objects, 4 interferometry, 5 and inverse synthetic aperture radar ͑ISAR͒ and synthetic aperture radar ͑SAR͒ imaging, [6][7][8] to name a few applications. This list is far from complete and does not reflect the extent of the literature on noise radars.…”

Continuous Wave Radars–monostatic, Multistatic and Network

“…At present, the noise waveform concept is applied in many different types of radars. Many papers have been published on short-range surveillance radar, on imaging radar working in both SAR [9,16,17,19,20,30,31] and ISAR mode [10,14], ground penetrating radars [3,7] and others [22]. Noise radar may be used with a mechanically or electronically scanning antenna as well as with a multi-beam antenna.…”