Overview. Copyright Remcom Inc. All rights reserved.

Transcription

1 Overview

2 Remcom: Who We Are EM market leader, with innovative simulation and wireless propagation tools since 1994 Broad business base Span Commercial and Government contracting International presence: distributors in 18 countries Small business, headquartered in State College, PA Agile: tuned-in to customers and quick to respond to their needs Demonstrated success on government contracts and SBIRs Strong track record of commercializing results from SBIR Phase II s 2001 Army SBIR II Quality Award for SBIR ultimately resulting in Wireless InSite commercial product

3 Remcom Software Products & Capabilities Commercial & DoD Software, Custom Tools & Expert Analysis for Antennas & Sensors, EM Scattering, & RF Propagation Full-Wave Solver: Antennas, EM Scattering, Medical Devices, & Bio Effects Height (meters) Long-Range Prop Models for DoD Tactical Decision Aids Ducting and Terrain Effects on Propagation Range (kilometers) RF Propagation in Urban, Indoor, and Outdoor over Rough Terrain Loss (db) Antenna Radiation & RCS from Electrically Large Platforms Rotman Lens Designer

4 Wireless InSite is a suite of ray-tracing models and high-fidelity EM solvers for the analysis of site-specific radio propagation available through a common user interface. Propagation Over Terrain Urban Wireless Communication Indoor and Outdoor-to-Indoor

5 Wireless InSite Originally developed for outdoor urban radio propagation predictions Extended to irregular terrain, foliage, indoor, and indooroutdoor predictions Physics-based models using ray methods with GTD/UTD diffraction, and FDTD based models Empirical models for very fast calculations GPU acceleration available for two models: X3D MWFDTD

6 Ray Based UTD Models Ray models include 2D & full vector 3D Evaluate ray path E-fields using Uniform Theory of Diffraction (UTD) and material-dependent reflection and transmission coefficients, Combine E-fields with antenna patterns to find path loss, received power, complex impulse response, etc. Ray path geometry provides time of arrival, angle of departure & arrival, etc.

7 Ray Based UTD Models X3D and Full 3D Execute a full 3D ray tracing Full implementation of UTD formulation Urban Canyon Calculation in a 2D horizontal plane Assumes very tall buildings, a flat ground and low antenna heights Omits paths over rooftops and shadowing by terrain Vertical Plane Propagation in 2D vertical plane Best suited for Irregular Terrain

8 Graphical User Interface (GUI) Import, edit, and view geometrical features such as buildings, terrain, foliage and floor plans Specify electromagnetic properties of materials Specify location of transmitters and receivers Specify properties of associated antennas Set frequency and other waveform characteristics Specify propagation model Initiate calculations View and plot model output

9 GUI Modular Design Project hierarchy Project view Main window

10 GUI Main Window Separate tabs for Features, Images, Study areas, Transmitters, Receivers, Communication Systems, Materials, Antennas, Waveforms, Requested Output, Output and Output Filters

11 Project Hierarchy Window Gives a condensed view of all items in the project Supports multiple selection Some information is only available in the hierarchy: Tx/Rx set id numbers that correspond to the output files generated by the calculation engine Project view settings

12 Selection is Keyed to Project View Display

13 Context Menus Context menu s are available by right-clicking on a highlighted item in any of these windows

14 Typical Project Work Flow Define Project Inputs Geometry Features Material Properties Waveform Antenna Patterns Transmitter and Receiver Locations Studyarea Request Output Run Calculations View/Plot Output

15 Features Features represent the geometry in the project that the propagation rays interact with to produce reflections, diffractions and transmissions All features are positioned in the project based on their geographic origin Features are composed of faces (facets) Features can be imported from files various supported formats

16 Features (2) Each feature type is used for a different purpose and provides a different set of commands to interact with it. For example: Cities are composed of buildings that can be conformed to the terrain and simplified to remove unnecessary detail, resulting in faster calculations Terrains can render itself with images projected onto it, such as topographic maps and aerial photographs Foliage is rendered translucently and has a special subset of materials specific to it Floor plans represent indoor layouts Objects represent general geometry features like cars, furniture, etc.

17 Materials Material properties are used to determine reflection, transmission and diffraction coefficients Typically defined with a permittivity, conductivity, thickness A database of predefined materials Concrete, wood, metal, glass, water, brick Additional materials can be created and added to the database.

18 Materials (2) Each face in a feature is assigned a material Each material has a color so it can be distinguished from other materials Each material appears in the project legend Special materials are included for foliage feature types Users can define a material based on a file with information about angle, frequency and polarization coefficients

19 Waveforms The waveform defines the operating frequency Each transmitter and receiver in the project must have a waveform assigned to it Wireless InSite contains a waveform database

20 Antennas Each transmitter and receiver in the project has an associated antenna Antennas can be imported from several formats, such as NSMA, Odyssey and MSI Planet Antenna files can be added to a database and users can create custom antennas

21 Antennas (2) Many generic antenna types are available with parameters that can be customized by the user, such as: Linear dipole, pyramidal horn, patches, apertures, helix, parabolic reflector, directional antennas, and others Antenna patterns can be viewed in the project window Plots of cut planes from the pattern can be generated The 3D rendering of an antenna in its properties window can be rotated and viewed from any angle

22 Transmitters and Receivers Transmitters are the points of input radiation into the project. Receivers are field points where output from the simulation is calculated. Both transmitters and receivers have an associated antenna and waveform.

23 Transmitters and Receivers (2) Transmitters and receivers provide many different layout options. The points can be placed: Independently Points can also be mounted on faces of the geometry in the same manner Along a connected set of line segments This route can be extruded into a vertical surface of points Within a rectangular region Along the circumference of a circle The set type can be extruded into a cylinder As a sphere of points

24 Study Areas Study areas define: What propagation model will be run e.g. Urban Canyon, Full 3D, X3D, Hata, Vertical plane Input parameters specific to each model E.g. Maximum number of reflections, transmissions, diffractions, etc. The physical region for which a given calculation model will be run

25 Requested Output Given the many output types, calculations can produce a large amount of data In the Requested Output window, the output can be limited to only what is needed

26 Communication Systems Calculates additional post-processed outputs for selected transmitters and receivers Bit-error rates using Matlab s Communication Toolbox Throughput estimates for WiMAX and LTE systems Multiple Transmitter Outputs Strongest Transmitter Maximum Power Total Power from all transmitters Carrier to Interferer Ratio

27 Running a Calculation Once the propagation model is specified and the project has all of the required elements, it can be run to produce various types of output The Full 3D model supports re-running the calculation using more efficient modes at a later time as long as the geometry has not been modified

28 Output After a calculation, available output is displayed in the main window Output is organized by studyarea, output type, transmitter, then receiver set Outputs can be displayed in the Project View or plotted The propagation paths retained by the calculation during the ray casting can also be viewed

29 Output (2) View of received power output from TX 15 Plot of received power from TX 15 to the points in the Moore St. receiver set.

30 Output Urban Example: Ray Paths and Signal Strength

31 Summary Wireless InSite provides general radio propagation prediction for outdoor, indoor, and outdoor-indoor situations Calculation input and results are organized and controlled using tabbed windows and file trees Complicated geometries may be entered using Wireless InSite editors or by importing a file Fast calculation Available for Windows and Linux (engine only) operating systems