This paper presents the application of the multifrequency range imaging technique (RIM) on the Chung-Li VHF radar during several experiments between 2008 and 2013. By using this technique it is possible to get a better range resolution than the original radar pulse range gate. Hence very thin structures are observable continuously in range and time. This technique is well known in the radar atm...

[1] Farina, A. (1992) Antenna-Based Signal Processing Techniques for Radar Systems. Norwood, MA: Artech House, 1992. [2] Compton, R. T. (1988) Adaptive Antennas–Concepts and Performance. Englewood Cliffs, NJ: Prentice Hall, 1988. [3] Monzingo, R. A., and Miller, T. W. (1980) Introduction to Adaptive Arrays. New York: Wiley, 1980. [4] Johnson, J. R., Fenn, A. J., Aumann, H. M., and Willwerth, F....

We are designing, implementing, and testing the user interface for RADAR (Reflective Agents with Distributed Adaptive Reasoning), which is a large multi-agent system that uses learning to help office workers cope with email overload and to complete routine tasks more efficiently. RADAR provides a mixed-initiative user interface in which artificial intelligence helps users perform the tasks that...

The U.S. Government operates seven distinct radar networks providing weather and aircraft surveillance for public weather services, air traffic control, and homeland defense. A next-generation, multifunction phased array radar (MPAR) concept has been proposed that could provide enhanced weather and aircraft surveillance services with potentially lower life-cycle costs than multiple single-funct...

A MIMO (multi-input multi-output) radar system, unlike a standard phased-array radar, can transmit via its antennas multiple probing signals that may be correlated or uncorrelated with each other. We provide herein an overview of our recent result, showing that this waveform diversity enables the MIMO radar superiority in several fundamental aspects, including: 1) significantly improved paramet...

This paper addresses the issue of employing space-time adaptive processing (STAP) prior to doppler filtering in radar systems. When STAP beamformer processing is applied to spatial/temporal samples that include successive radar pulses, the adaptive weights can cause modulation (spreading) of the desired target doppler. In this paper, a linearly constrained adaptive beamformer is proposed that e...

By comparing the disadvantages and advantages of conventional algorithms of adaptive beamformer, we put forward an adaptive beamformer based on weight iterative algorithm for suppressing radio frequency interference (RFI), according to the distributing properties of RFI in different range cell. We get the initial weight vector of the adaptive beamformer by utilizing the algorithm of minimum var...

In this paper, a pattern recognition system is developed for automatic classification of the radar target signals. Feature extraction is an important subset of the pattern recognition system. For feature extraction is used Short Term Fourier Transform (STFT) time-frequency distribution of the pulse radar target signals. Adaptive Network Based Fuzzy Inference System (ANFIS) classifier is used at...

Introduction: The Shallow Radar instrument (SHARAD) on the Mars Reconnaissance Orbiter (MRO) has been successful at penetrating into icy deposits [1-3], but most of the rocky units are opaque to SHARAD. The main exceptions to this are the youngest major volcanic surfaces, Cerberus Fossae 2 and 3 units and Amazonis Planitia 2 north unit [4]. We suggest that these units have low radar loss becaus...