The Advanced Regional Prediction System (ARPS) model is employed to perform high-resolution numerical simulations of a mesoscale convective system and associated cyclonic line-end vortex (LEV) that spawned several tornadoes in central Oklahoma on 8–9 May 2007. The simulation uses a 1000 km 3 1000 km domain with 2-km horizontal grid spacing. The ARPS three-dimensional variational data assimilati...

This paper addresses the challenge of respiration harmonics cancellation in microwave Doppler radar cardiopulmonary sensing. A new signal processor based on adaptive noise cancellation is proposed. When the heartbeat signal is easily overwhelmed by the respiration harmonics, the traditional band-pass filters are used to separate heartbeat signal from the respiration signal, then the LMS-based m...

The detection of slow moving targets by a moving bistatic pulsed Doppler radar system is addressed. Optimum clutter rejection is achieved using space-time adaptive processing (STAP). This requires estimating the clutter-plus-noise covariance matrix using a sequence of snapshots at successive ranges. For most monostatic and for all bistatic radar configurations, these snapshots are rangedependan...

References [Donovan, 2005] B. Donovan, D. J. McLaughlin, Improved Radar Sensitivity Through Limited Sector Scanning: The DCAS Approach, Proceedings of AMS Radar Meteorology, 2005. [Malouch, 2007] N. Malouch, V. Manfredi, J. Kurose, C. Zhang, On the Value of Separation of Control and Data in a Distributed Meteorological Sensing Network, UMASS Tech. Rep. 2007-24. [Mclaughlin,2005] D. McLaughlin, ...

This paper describes the underlying methodology behind an adaptive multimodal radar sensor that is capable of progressively optimizing its range resolution depending upon the target scattering features. It consists of a test-bed that enables the generation of linear frequency modulated waveforms of various bandwidths. This paper discusses a theoretical approach to optimizing the bandwidth used ...

Radar based object detection systems have been in place for about a century serving various purposes like detection of ships aircrafts, spacecraft, navigation, reading weather formations and terrain mapping. With the advent of better packing technologies and signal conditioning circuits radars have become compact and affordable thus offering comparatively low cost solutions than other systems b...

AbstructAdaptive beamforming techniques are now widely used to reject interference Uammerklutter) signals in radar, communication, and sonar applications. In adaptive arrays using the sample matrix inversion (SMI) algorithm, inadequate estimation of the covariance matrix results in adaptive antenna patterns with high sidelobes and distorted mainbeams. In this paper, a method is proposed to prec...

The objective of this research is from radar life parameter monitoring system for respiration and heartbeat signal separation, therefore the characteristic parameters of respiration; heartbeat could be extracted to provide the basis for family care and disease prevention. This paper put forward a method to analyze the characteristics of the echo signal, improve adaptive filter harmonic combinat...

Email clients were not designed to serve as a task management tools, but a high volume of task-relevant information in email leads many people to use email clients for this purpose. Such usage aggravates a user’s experience of email overload and reduces productivity. Prior research systems have sought to address this problem by experimentally adding task management capabilities to email client ...

Reduced rank (RR) linearly constrained minimum variance (LCMV) adaptive beamforming with quadratic pattern constraints (QPC) is applied to space-time adaptive processing (STAP) for airborne radar. The problem is formulated for general rank reducing transformations and main beam and sidelobe pattern control is achieved by imposing a set of inequality constraints on the mean-square error between ...