Motion Modeling and Coordinate Systems
The Phased Array System Toolbox™ lets you model the motion of radars, sonars, targets,
jammers, or interference sources using the
System object™. This System object provides constant velocity and constant acceleration
motion models. These motion models can generate almost any type of
trajectory. You can display a 3-D visualization of a radar scenario
System object. The toolbox contains several utility functions that let
you transform between coordinates systems, transform between angular
coordinates, and convert between velocity and Doppler shift.
|Motion Platform||Motion platform|
Range and Doppler Transformations
Local to Global Coordinate Transformations
Local Coordinate Operations
|Rotation matrix for rotations around x-axis|
|Rotation matrix for rotations around y-axis|
|Rotation matrix for rotations around z-axis|
|Convert vector from Cartesian components to spherical representation|
|Convert vector from spherical basis components to Cartesian components|
|Spherical basis vectors in 3-by-3 matrix form|
|Convert u/v coordinates to azimuth/elevation angles|
|Convert azimuth/elevation angles to u/v coordinates|
|Convert angles from phi/theta form to azimuth/elevation form|
|Convert angles from azimuth-elevation form to phi-theta form|
|Convert u/v coordinates to phi/theta angles|
|Convert phi/theta angles to u/v coordinates|
Compute target motion using Doppler processing.
A critical component in phased array system applications is the ability to model motion in space.
Start with an airplane moving at 150 kmph in a circle of radius 10 km and descending at the same time at a rate of 20 m/sec.
Learn about the local and global coordinate systems used in the toolbox.
This example shows how several different coordinate systems come into play when modeling a typical radar scenario.
Construct a rectangular, or Cartesian, coordinate system for three-dimensional space by specifying three mutually orthogonal coordinate axes.
Spherical coordinates describe a vector or point in space with a distance and two angles.
This section introduces the concept of baseband signals and defines the local and global coordinate systems used in the toolbox.
Phased Array System Toolbox uses the International System of Units (SI).