NARCOSIS is a multilevel generic radarsimulation being produced in the Above Water systems Department of DERA Portsdown West. Sea, rain and land clutter, propagation and multipath effects are all included, as is simu...
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NARCOSIS is a multilevel generic radarsimulation being produced in the Above Water systems Department of DERA Portsdown West. Sea, rain and land clutter, propagation and multipath effects are all included, as is simulation of MTI and pulse doppler processing. The model is designed to be able to extend these functions using the extensive knowledge and trials results available in the department. A framework is developed which allows data from more detailed models to be interfaced to increase fidelity. Another feature of the model is its user friendly and flexible interfaces.
A computersimulation suite PHASAR which is in use and under continuous development at Roke Manor is presented. The program is written in FORTRAN and aids the design and testing of the then joint Plessey/MOD phased ar...
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A computersimulation suite PHASAR which is in use and under continuous development at Roke Manor is presented. The program is written in FORTRAN and aids the design and testing of the then joint Plessey/MOD phased array radar demonstrator MESAR. It evolved to have the capability to simulate virtually any antenna array for radar or communications. The standard version may be used for anything from a two element communications array to a large multi-thousand element phased array radar. The major attribute that sets it aside from other simulation program is its comprehensive capability to model adaptive cancellation systems from sidelobe cancellers to fully adaptive arrays with realistic error mechanisms fully modelled.
A software tool, radar Fuze Target Engagement Model (RAFTEM), for assessing radar proximity fuzes in the anti-air environment, which covers microwave and millimeter-wave active radarsystems installed within both surf...
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A software tool, radar Fuze Target Engagement Model (RAFTEM), for assessing radar proximity fuzes in the anti-air environment, which covers microwave and millimeter-wave active radarsystems installed within both surface-to-air and air-to-air missiles, is presented. The RAFTEM fuzing simulation tool provides comprehensive simulation of an engagement between an airborne target and a radar proximity fuze mounted on a missile. At fuzing ranges, the target does not behave in a statistical way with regard to the collection of scatterers. Because of the close range and the generally narrow fuze beam, the target is only partially illuminated. The fuze sees only one or a small collection of scatterers, and is in the near field of these scatterers.
A computer software model is developed to provide a quick and efficient method of evaluating airborne radar performance in the presence of ground clutter as a function of various radar system parameters, operational p...
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A computer software model is developed to provide a quick and efficient method of evaluating airborne radar performance in the presence of ground clutter as a function of various radar system parameters, operational parameters, antenna characteristics and clutter models. The model encompasses monostatic, semi-active and bistatic radar geometries and coherent pulse-Doppler, continuous-wave and frequency modulated continuous wave radar operating modes. The software Clutter Assessment upon the System Performance of Airborne radars (Caspar) provides modelling at a system level rather than at a detailed component level and is intended as a tool for use with a wide variety of radar platforms.
In recent years there has been considerable interest in applying sensor array signal processing techniques to a variety of radar applications. The use of adaptive spatial and temporal filtering techniques has been wid...
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In recent years there has been considerable interest in applying sensor array signal processing techniques to a variety of radar applications. The use of adaptive spatial and temporal filtering techniques has been widely discussed. The relative expense of building hardware and conducting experiments has led to a strong emphasis on simulation as a way of developing new equipment, but there are currently no software tools available that are particularly suited to the problems of simulating sensor array systems. This paper describes the current state of development of an adaptive array processing toolset (AdAPT) (1), which is capable of modellingsystems comprising large numbers of sensors. AdAPT encompasses modelling a target environment, design of array hardware, application and design of signal processing algorithms and the display and interaction of data as it flows through the design scenario. We also discuss the graphical user interface to AdAPT.
A `closed loop' simulation of the BAeDS family of Multi Function radars has been developed by the radarsystems group at Cowes. The closed loop nature of a MFR, where the next task executed by the radar depends on...
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A `closed loop' simulation of the BAeDS family of Multi Function radars has been developed by the radarsystems group at Cowes. The closed loop nature of a MFR, where the next task executed by the radar depends on the results of previously executed tasks, causes the performance of the radar to be dominated by the effects of positive and negative feedback. Many of the resulting effects can, in practice, be studied only with the aid of a detailed simulation which models all the major parts of the system, including the environment. The model reported on here consists of a number of `plug in' sub systems designed to be easily replaced with similar units. This enables different systems to be modelled by changing only the detail of each sub system. The model has proved its worth by demonstrating unexpected behaviour due to feedback. The initial use of the model demonstrated that unforeseen feedback loops, involving the track extractor, rendered the original energy partitioning between surveillance and track initiation, derived on the basis of an open loop model, less than optimal.
The Power System Blockset (PSB) is a modern design tool based on SIMULINK that allows users to rapidly and easily simulate power systems. The electrical systems built with the blockset can be connected to other system...
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The Power System Blockset (PSB) is a modern design tool based on SIMULINK that allows users to rapidly and easily simulate power systems. The electrical systems built with the blockset can be connected to other systems to investigate the interactions between them. PSB is compatible with all of the MATLAB application toolboxes and blocksets, and it can be integrated with the STATEFLOW to model and simulate complex reactive systems. It is completely extensible and can be used as a starting point for the creation of additional starting blocks.
This paper discusses how the use of computer based modelling tools has aided the design of a telemetry unit for use with oil well logging. With the aid of modern computer based simulation techniques the new design is ...
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This paper discusses how the use of computer based modelling tools has aided the design of a telemetry unit for use with oil well logging. With the aid of modern computer based simulation techniques the new design is capable of operating at data rates of 2.5 times faster than previous designs.
computermodelling and simulation of radarsystems has been with us for many years, but has enjoyed only varying degrees of success when modelled performance is compared with the real world. The difficulty has been th...
computermodelling and simulation of radarsystems has been with us for many years, but has enjoyed only varying degrees of success when modelled performance is compared with the real world. The difficulty has been the accuracy with which models can represent the system and hence provide predictions of behaviour. Extensive tests and trials of radarsystems have always been essential to demonstrate final performance although often at great expense. modelling has a role to play in reducing the costs of today's and future systems' development. This has largely come about through the rapid advances made in computer technology enabling engineers to model and simulate their systems to a low enough level of resolution so that numerical techniques can replace purely analytical techniques which are often based on assumptions of convenience. In all cases of modelling, however, the predictions of radar system performance are of limited value unless the modellingsimulations are credible, and this means more than just providing artistic graphical presentations of results. This paper discusses the importance of integrated modelling plans, model validation strategies, the need for customer visibility and provides an example of how the cost of trials has been drastically reduced without compromising the achievement of actual radar performance by bringing the real world home.
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