Interferoceiver is a true correlation receiver and capable of overcoming severe problems caused by
conventional super heterodyne receivers, such as range inaccuracy, Doppler range ambiguity, fratricides,
excessive clutter contamination, undue inter system interference, etc. We had discussed the above
capabilities in our early publications. In this paper, we will present the experimental progresses on
interferoceiver as well as encountered obstacles. The technological revolution in radar and electronic
warfare is within sight.
A true correlation receiver is here. It has been referred to as the interferoceiver, which is able to
measure precisely the Doppler and range for fast moving and remote targets. With the help of an
interferoceiver, Doppler range ambiguity disappears. Doppler and range inaccuracies, intersystem
interference, and unreliable passive identification were problems of Patriot missiles which caused tragic
cases of fratricide during Operation Iraqi Freedom. The interferoceiver will be able to remove the above
problems and significantly reduce fratricide.
Optical RF network opens a new era for high precision measurements. The present paper
discusses its application on target detection and tracking with a precision which could not be achieved by
current radar systems. Such precision is needed for future air traffic control and for success of national
missile defense systems. Optical RF network can also used to monitor earthquake, and safety of dams,
bridges, and buildings, as well as for accurate attitude determination of moving platforms like satellites,
ships, aircraft, helicopters, etc.
The ability of interferoceiver to reveal micro Doppler signatures from a single radar pulse opens a
new era in automatic target recognition. The present paper considers a real scenario to illustrate the power
of such ability. In July 3, 1988, a United States Navy battleship in the Persian Gulf shot down an Iranian
passenger plane Flight 655. The Navy said they mistook it for a jet fighter. The incident killed all 290
people on board the passenger plane. This is a case of misidentification, which could be avoided with the
help of interferoceiver.
Transient phenomena contain rich intrinsic features as shown in the famous Edgerton's photo of a bullet piercing through an apple with the help of a stroboscope. Although a photo is able to freeze transient phenomena, it still lacks the ability to reveal intrinsic micro motions of constituents. The advancement of optical fibers has changed the above scenario. An RF transient signal and its reference can be fed into optical fiber recirculation loops, which are able to regenerate numerous replicas of these signals. The micro motions captured by the transient signal can then be deciphered through the repeated analysis of its replicas. A new instrument which is capable of accomplishing the above is known as an interferoceiver. It will have a broad impact on radar technology as well as on remote sensing and passive identification. The present talk will discuss its capabilities and experimental results.
Optical fiber recirculation loops will change the technical foundation of radar and electronic warfare technologies. It becomes possible to measure Doppler beating with a single pulse, to map out micro Doppler signature with a resolution better than 1.0 Hz, and to take sharp IASR images of targets which are more than several hundred miles away. With fine micro Doppler signature and high precision ISAR images, the passive identification of targets will become a reality.
Ultra-wideband radar leads to optimum slant range resolution in radar imaging. There is a major problem in receiving short duration ultra-wideband radar signals and preserving their wave forms, because the conventional radar receivers are super heterodyne receivers. The present paper will show how optical fiber recirculation loop based interferoceiver will resolve the above problem.