Matra

About: Matra is a based out in . It is known for research contribution in the topics: Signal & Detector. The organization has 1330 authors who have published 1216 publications receiving 17967 citations.

CAD based high frequency RCS computing code for complex objects : Sermat

Abstract: We present a high-frequency monostatic rcs, calculation code : Sermat which can be applied either to complex perfectly conducting or coated targets. This code operates on targets whose surface is described in terms of facets. It is an hybridization of the physical theory of diffraction for reflections and diffractions and the shooting and bouncing rays method for cavities. Written in standard Fortran, it can be run on Unix workstations. It is designed to fulfill industrial requirements (speed, precision...) and is extensively used by Matra Defense for its own needs. Some results are presented and compared with exact solutions and experimental data.

Delivering spacecraft control centers with embedded knowledge-based systems: The methodology issue

Abstract: Matra Marconi Space (MMS) occupies a leading place in Europe in the domain of satellite and space data processing systems. The maturity of the knowledge-based systems (KBS) technology, the theoretical and practical experience acquired in the development of prototype, pre-operational and operational applications, make it possible today to consider the wide operational deployment of KBS's in space applications. In this perspective, MMS has to prepare the introduction of the new methods and support tools that will form the basis of the development of such systems. This paper introduces elements of the MMS methodology initiatives in the domain and the main rationale that motivated the approach. These initiatives develop along two main axes: knowledge engineering methods and tools, and a hybrid method approach for coexisting knowledge-based and conventional developments.

Influence of Oxide Characteristics on the Reliability of Bipolar Products

Abstract: As MOSFET characteristics strongly depend on oxide parameters, it appeared very interesting to use the parasitic FET structure between isolation and base to obtain these parameters. This measurement method, which is able to give oxide thickness, oxide charge, surface concentration and interface state density, will be described. The correlation curve for a specific reliability problem will be given and from that correlation the failure mechanism will be described.

New approximation for the partially observed jump linear quadratic problem

Abstract: We consider the Jump Linear Quadratic Problem where linear state dynamics are made contingent upon the markovian transition of a regime variable. It is desired to regulate the state while minimizing a quadratic performance index. In the case of partial observations the exact solution has proved to be elusive and we present a new approximation based on the optimal solution of an average version of the original problem.

Method and apparatus for adapting a signal transmitted between two digital networks

Abstract: The apparatus according to the invention is used to adapt a digital signal transmitted between an asynchronous appliance operating at a first speed and a synchronous network operating at a second speed higher than the first speed. In a preferred mode, it comprises a read/write unit (4) for writing into a memory unit (3) a signal received at the first speed, and a read/write unit (5) synchronised with the synchronous network for reading at the second speed the signals stored in the memory unit and inserting them into the synchronous network, or operating according to the reverse mode.