Multi-user augmented reality systems are especially dependent on precise registration. In this paper, we present a hybrid tracking system that combines optical and magnetic tracking. The magnetic tracking is used to give a robust estimate of position and orientation which then can be re"ned in realtime by optical tracking. The system is more precise than a magnetic tracker and both faster and m...

Gunshot detection, sniper localization, and bullet trajectory prediction are of significant importance in military and homeland security applications. While the majority of existing work is based on acoustic and electro-optical sensors, this paper develops a framework of networked radar systems that uses distributed radar sensor networks to achieve the abovementioned objectives. The use of radi...

This paper presents a method of imaging a twodimensional section of a walking person using multiple Doppler radar systems. Although each simple radar system consists of only two receivers, different radial speeds allow target positions to be separated and located. The signal received using each antenna is processed employing time–frequency analysis, which separates targets in the time–range– ve...

Bias estimation is a prerequisite to data fusion in ATC environments. Radar networks and aircraft transponders have different bias terms which should be cancelled in order to perform a correct multisensor tracking. In this paper, several general architectures to overcome these problems will be proposed, taking into account both radar and aircraft biases. Its performance, both in terms of accura...

Radar systems, based on bistatic radar concept attracted a substantial attention in the recent years. Passive coherent location systems using “transmitters of opportunity” like radio or TV broadcasters, GSM base stations, satellite communication and GNSS signals proved their potential in detection and tracking moving targets over a significant area. In this paper the multistatic location system...

— We have proposed a method to detect and track moving ships using position from Radar and image processor. Real-time segmentation of moving regions in image sequences is a fundamental step in the radar-camera integrated system. Algorithms for segmentation of objects are implemented by composing of background subtraction, morphologic operation, connected components labeling, region growing, and...

There are very complex communication systems, as the multifunction radar, MFAR (Multi-Function Array Radar), where functions are integrated all together, and simultaneously are performed the classic functions of tracking and surveillance, as all the functions related to the communication, countermeasures, and calibration. All these functions are divided into the tasks to execute. The task sched...

Recently DLR has developed and constructed a new experimental radar instrument for various applications like radar signature collection, SAR/ISAR imaging, motion detection, tracking, etc., where high performance and high flexibility have been the key drivers for system design. Consequently a multipurpose and multi-channel radar called GigaRad is operated in X band and allows an overall bandwidt...

This paper describes the application of Knowledge-Based System (KBS) to tracking. Section 2 paves the way to the new technology by discussing the following topics: historical survey of stochastic filtering theory; overview of tracking systems with some details on mono-sensor and multi-sensor tracking, evolution of filtering logics, evolution of correlation logics, and presentation of recent fin...

An airborne ground looking radar sensor’s performance may be enhanced by selecting and modifying algorithms adaptively as the environment changes. A brief presentation of an airborne intelligent radar system (AIRS) is provided. A description of the knowledge based tracker portion of AIRS is emphasized. Many tracking algorithms discard all information about a track once a track is dropped. Our a...