We describe new methods on the modeling of the ampli tude statistics of airborne radar clutter by means of alpha stable distributions We develop target angle and Doppler maximum likelihood based estimation techniques from radar measurements retrieved in the presence of impulsive noise thermal jamming or clutter modeled as a multivariate sub Gaussian random process We derive the Cram er Rao boun...

Radar systems have come a long way since their introduction in the 1940’s, today encompassing a broad range of applications, ranging from supermarket door openers to highly complex shipboard phased-array fire-control radars. Modern systems require higher performance to work in today’s ever more complex Electronic Warfare (EW) environments, which include jamming and deception. As a result, EW sy...

One of the most important functions of a radar antenna is to provide spatial filtering that maximizes the radar's sensitivity in the desired sUIveillance direction while suppressing interference signals that enter the radar from other directions. This article describes a UHF radar antenna systemwith exceptional interference-rejection capabilities that are achieved through a combination of preci...

Radar systems using ultra-wideband (UWB) signals have definitive advantages in high range resolution. These are suitable for accurate 3-dimensional (3-D) sensing by rescue robots operating in disaster zone settings, where optical sensing is not applicable because of thick smog or high-density gas. For such applications, where no a priori information of target shape and position is given, an acc...

An algorithm based on space fast time adaptive processing to estimate the physical location of an interference source closely associated with a physical object and enhancing the detection performance against that object using a phased array radar is presented. Conventional direction finding techniques can estimate all the signals and their associated multipaths usually in a single spectrum. How...

This paper presents a two-level architecture for the implementation of a distributed simulation environment for interference detection and frequency assignment in naval radar units. The Java-based simulation is designed as a two level architecture incorporating i) multiple radars on each ship controlled through a lower-level intra-ship interference control module and, ii) multiple ships in a gr...

A multiple input multiple output ultra-wideband cognitive radar based on compressive sensing is presented in this letter. For traditional UWB radar, high sampling rate analog to digital converter at the receiver is required to meet Shannon theorem, which increases hardware complexity. In order to bypass the bottleneck of ADC or further increase the radar bandwidth using the latest wideband ADC,...

This paper presents a spectrum sharing technology enabling interference-free operation of a surveillance radar and communication transmissions over a common spectrum. A cognitive radio receiver senses the spectrum using low sampling and processing rates. The radar is a cognitive system that employs a Xampling-based receiver and transmits in several narrow bands. Our main contribution is the all...