This paper proposes an imaging method of multi-direction swath and digital beamforming (DBF) in elevation for spaceborne Hybrid Phased-MIMO SAR that combines traditional phased-array radar with a new technique for multiple-input multiple-output (MIMO) radar to achieve multifunctional synthetic aperture radar (SAR). At first, we build a signal model and derive a virtual control matrix of the Hyb...

Abstract This paper presents a new robust adaptive filtering method for SINS/SAR (Strap-down Inertial Navigation System / Synthetic Aperture Radar) integrated navigation system. This method adopts the principle of robust estimation to adaptive filtering of observational data. A robust adaptive filter is developed to adaptively determine the covariance matrix of observation noise, and adaptively...

In this work we consider the problem of determining efficient scanning strategies for adaptive networks of radars used to monitor meteorological events. While most meteorological radars traditionally scan 360 degrees, repeatedly, more accurate readings can be obtained if adaptive sector scanning is performed. We propose a scanning strategy based on analyzing eigenimages computed given a set of ...

Air is not the only medium that can spread and can be used to detect speech. In our previous paper, another valuable medium — millimeter wave (MMW) was introduced to develop a new kind of speech acquisition technique [6]. Because of the special features of the MMW radar, this speech acquisition method may provide some exciting possibilities for a wide range of applications. In the proposed stud...

This paper presents a systematic scheme for fusing millimeter wave (MMW) radar and a monocular vision sensor for on-road obstacle detection. As a whole, a three-level fusion strategy based on visual attention mechanism and driver's visual consciousness is provided for MMW radar and monocular vision fusion so as to obtain better comprehensive performance. Then an experimental method for radar-vi...

This study presents a two-dimensional variational approach to retrieving raindrop size distributions (DSDs) from polarimetric radar data in the presence of attenuation. A two-parameter DSD model, the constrained-gamma model, is used to represent rain DSDs. Three polarimetric radar measurements, reflectivity (ZH), differential reflectivity (ZDR) and specific differential phase (KDP), are optimal...

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...

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...

Abstract—Space-Time Adaptive Processing (STAP) algorithm has recently been used in Passive Bi-static Radars (PBR) because it removes the clutter and non-cooperative transmitter effectively making the target detection easy in harsh environments like air-ground. Realtime implementation of STAP is a very challenging task as it is computationally-intensive, time-critical and resource-hungry process...

This section gives a short survey of the principles and the terminology of phased array radar. Beamforming, radar detection and parameter estimation are described. The concept of subarrays and monopulse estimation with arbitrary subarrays is developed. As a preparation to adaptive beam forming, which is treated in several other sections, the topic of pattern shaping by deterministic weighting i...