henry chandran - Academia.edu (original) (raw)
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Papers by henry chandran
High-Speed Computing, Digital Signal Processing, and Filtering Using Reconfigurable Logic, 1996
Communication technology is undergoing a revolutionary change. Most of the traditional signal pro... more Communication technology is undergoing a revolutionary change. Most of the traditional signal processing is moving from an analog to an algorithm basis, Chiptelos, a software based reconfigurable subsystem, provides applications up to radio frequencies for telemetry, telecommunication and navigation. It allows test and evaluation of a design early in the project stage on a single integrated development environment.
International Telemetering Conference Proceedings, Oct 1, 2001
Traditional communication hardware has focused on modular architectures. Now, with the incoming h... more Traditional communication hardware has focused on modular architectures. Now, with the incoming high speed DSP and FPGAs a shift from traditional modular architecture to reconfigurable architecture has taken place. The nature of this architecture allows to optimize various telemetry applications in a single platform. This paper describes a reconfigurable multi channel communication system.
La presente communication decrit les travaux effectues dans le cadre du projet NEPTUNE, visant au... more La presente communication decrit les travaux effectues dans le cadre du projet NEPTUNE, visant au developpement d'un radar naval de faible puissance de veille et de designation. Dans ce cadre, la detection de petite cible en incidence tres rasante est recherchee, pour des etats de mer varies. Pour cela, la base de donnees CSIR a ete particulierement etudiee et l'analyse qui en a ete faite a permis de mettre en lumiere certaines caracteristiques du fouillis et du couplage cible-mer. Son exploitation a apporte des elements utiles au developpement d'un modele de generation de fouillis de mer par l'equipe propagation de l'ONERA/DEMR, mais a permis egalement l'analyse de performances de detecteurs developpes par l'equipe de traitement du signal. L'objet de cette communication est de presenter des resultats representatifs des phenomenes physiques en jeu, ainsi que des resultats en detection de cibles.
IEEE Transactions on Aerospace and Electronic Systems, 2021
This article aims at providing an efficient algorithm for sea clutter segmentation in coherent ra... more This article aims at providing an efficient algorithm for sea clutter segmentation in coherent radar images. Using multiphase interface motion models, we show that segmentation in the range–time–intensity map gives much more relevant results than segmentation in the range–Doppler Map and avoids the use of assumptions on the clutter frequency response. Several mathematical models are evaluated on real data corresponding to Douglas sea states of approximately 5. Dealing with diffuse interface motion models involving more than two phases allows us to take into account the low contrast, the interference noise, and the contour weakness that are typical of range–time–intensity map images. Sea clutter segmentation allows us, for instance, to obtain oceanographic parameters such as sea state, direction, and velocity of the swell and the wind. It can also be seen as preprocessing that may be useful for target detection.
Network Protocols and Algorithms, 2012
Traditional communication hardware has focused on modular architectures. Now, with the incoming h... more Traditional communication hardware has focused on modular architectures. Now, with the incoming high speed DSP and FPGAs a shift from traditional modular architecture to reconfigurable architecture has taken place. The nature of this architecture allows to optimize various telemetry applications in a single platform. This paper describes a reconfigurable multi channel communication system.
High-Speed Computing, Digital Signal Processing, and Filtering Using Reconfigurable Logic, 1996
Communication technology is undergoing a revolutionary change. Most of the traditional signal pro... more Communication technology is undergoing a revolutionary change. Most of the traditional signal processing is moving from an analog to an algorithm basis, Chiptelos, a software based reconfigurable subsystem, provides applications up to radio frequencies for telemetry, telecommunication and navigation. It allows test and evaluation of a design early in the project stage on a single integrated development environment.
International Telemetering Conference Proceedings, Oct 1, 2001
Traditional communication hardware has focused on modular architectures. Now, with the incoming h... more Traditional communication hardware has focused on modular architectures. Now, with the incoming high speed DSP and FPGAs a shift from traditional modular architecture to reconfigurable architecture has taken place. The nature of this architecture allows to optimize various telemetry applications in a single platform. This paper describes a reconfigurable multi channel communication system.
La presente communication decrit les travaux effectues dans le cadre du projet NEPTUNE, visant au... more La presente communication decrit les travaux effectues dans le cadre du projet NEPTUNE, visant au developpement d'un radar naval de faible puissance de veille et de designation. Dans ce cadre, la detection de petite cible en incidence tres rasante est recherchee, pour des etats de mer varies. Pour cela, la base de donnees CSIR a ete particulierement etudiee et l'analyse qui en a ete faite a permis de mettre en lumiere certaines caracteristiques du fouillis et du couplage cible-mer. Son exploitation a apporte des elements utiles au developpement d'un modele de generation de fouillis de mer par l'equipe propagation de l'ONERA/DEMR, mais a permis egalement l'analyse de performances de detecteurs developpes par l'equipe de traitement du signal. L'objet de cette communication est de presenter des resultats representatifs des phenomenes physiques en jeu, ainsi que des resultats en detection de cibles.
IEEE Transactions on Aerospace and Electronic Systems, 2021
This article aims at providing an efficient algorithm for sea clutter segmentation in coherent ra... more This article aims at providing an efficient algorithm for sea clutter segmentation in coherent radar images. Using multiphase interface motion models, we show that segmentation in the range–time–intensity map gives much more relevant results than segmentation in the range–Doppler Map and avoids the use of assumptions on the clutter frequency response. Several mathematical models are evaluated on real data corresponding to Douglas sea states of approximately 5. Dealing with diffuse interface motion models involving more than two phases allows us to take into account the low contrast, the interference noise, and the contour weakness that are typical of range–time–intensity map images. Sea clutter segmentation allows us, for instance, to obtain oceanographic parameters such as sea state, direction, and velocity of the swell and the wind. It can also be seen as preprocessing that may be useful for target detection.
Network Protocols and Algorithms, 2012
Traditional communication hardware has focused on modular architectures. Now, with the incoming h... more Traditional communication hardware has focused on modular architectures. Now, with the incoming high speed DSP and FPGAs a shift from traditional modular architecture to reconfigurable architecture has taken place. The nature of this architecture allows to optimize various telemetry applications in a single platform. This paper describes a reconfigurable multi channel communication system.