Cognitive Radar is a recently proposed system concept, one of whose most important characteristics is the closed-loop operation. The feedback structure from the receiver to the transmitter enables the optimization of transmission waveforms based on the latest knowledge about targets and environments. In this paper, we propose an improved waveform design method for target recognition in cognitiv...

The Micro Rain Radar 2 (MRR) is a compact Frequency Modulated Continuous Wave (FMCW) system that operates at 24 GHz. The MRR is a low-cost, portable radar system that requires minimum supervision in the field. As such, the MRR is a frequently used radar system for conducting precipitation research. Current MRR drawbacks are the lack of a sophisticated post-processing algorithm to improve its se...

Abstract With the improvement in anti-reconnaissance performance of new system radar, signals sent by radar are more and difficult to be detected, which brings challenges electronic reconnaissance. In order find enemy earlier, receiver usually needs high sensitivity detect weak signals. Therefore, according characteristics airborne PD pulses, a method parameter measurement based on non-coherent...

The radar range resolution depends on signal bandwidth thereby detection of multiple closely spaced scattered points depends on bandwidth. To resolve this method of pseudo resolution is introduced which exploits the bandwidth allocation and increases the resolution of the overlapping scattered point (target/multipath). This resolution can be achieved by increasing the bandwidth of the received ...

This paper demonstrates that sonar images correlate badly because target geometry and image fringes correlate in different coordinate systems. It is shown that if the receiver is a line array, all point objects have the same image in a coordinate system with axes of range and the sine of target bearing (the (r, s) coordinate system). Results from an ocean experiment are presented. The ocean exp...

Ultra wide band (UWB) radar hologmphy is a unique technique developed at PNNL for the U. S. Army to obtain nearfield "3-D" images and scattering characteristics of full-size vehicles in the field and at productwn line facilities. The extremely high-resolution imaging capability of this technique maps a vehicle's scattering areas and idenhfies the "hot spots" which dominate the far-field signatu...

We consider plane wave time-domain scattering from a fixed target in the presence of a rough (random) surface with application to ground penetrating radar. The timedomain scattering data are computed via a two-dimensional (2-D) finite-difference time-domain (FDTD) algorithm. In addition to examining the statistics of the time-domain fields scattered from such a surface, we investigate subsurfac...

Passive Coherent Location (PCL) requires detailed knowledge about the geometric transceiver-receiver-constellations and the technical parameters for simulating the effective field of view. Geographic Information Systems (GIS) provide tools to fuse spatial information with technical metadata to evaluate individual geometric constellations and obtain optimal radar coverage. This paper presents a ...