The example illustrates the use of Swerling target models to describe the fluctuations in radar cross-section. The scenario consists of a rotating monostatic radar and a target having a
How several different coordinate systems come into play when modeling a typical radar scenario. The scenario considered here is a bistatic radar system consisting of a transmitting radar
Propagate a signal in free space from a stationary radar to a moving target.
Propagate a wideband signal with three tones in an underwater acoustic with constant speed of propagation. You can model this environment as free space. The center frequency is 100 kHz and
Construct a linear FM pulse waveform of 50 ms duration with a bandwidth of 100 kHz. Model the range-dependent time delay and amplitude loss incurred during two-way propagation. The pulse
Demonstrates how to simulate the effect of a barrage jammer on a target echo. First, create the required objects. You need an array, a transmitter, a radiator, a target, a jammer, a collector,
Assume a transmitter is located at (1000,250,10) in the global coordinate system. Assume a target is located at (3000,750,20) . The transmitter operates at 1 GHz. Determine the free space
Examines the statistical properties of the barrage jammer output and how they relate to the effective radiated power (ERP) . Create a barrage jammer using an effective radiated power of 5000
Assume a target approaches a stationary receiver with a radial speed of 23.0 m/s. The target reflects a narrowband electromagnetic wave with a frequency of 1 GHz. Estimate the one-way
Create a radar target with a nonfluctuating RCS of 1 square meter and an operating frequency of 1 GHz. Specify a wave propagation speed equal to the speed of light.
The TwoWayPropagation property of the phased.FreeSpace System object™ lets you simulate either one- or two-way propagation. The following example demonstrates how to use this property
Creates and transmits a linear FM waveform with a 1 GHz carrier frequency. The waveform is transmitted and collected by an isotropic antenna with a back-baffled response. The waveform
Start with an airplane moving at 150 kmh in a circle of radius 10 km and descending at the same time at a rate of 20 m/sec. Compute the motion of the airplane from its instantaneous acceleration as
Create and display a multiplatform scenario containing a ground-based stationary radar, a turning airplane, a constant-velocity airplane, and a moving ground vehicle. The turning
Illustrate pulse-Doppler processing using Phased Array System Toolbox™. Assume that you have a stationary monostatic radar located at the global origin, (0,0,0) . The radar consists of a
Assume you observe a Doppler shift of 400.0 Hz for a waveform with a frequency of 9 GHz. Determine the radial velocity of the target.
Model several RF propagation effects. These include free space path loss, atmospheric attenuation due to rain, fog and gas, and multipath propagation due to bounces on the ground. This
Most platforms in phased array applications do not move with constant velocity. If the time interval described by the number of time steps is small with respect to the platform speed, you can
Classify radar returns using feature extraction followed by a support vector machine (SVM) classifier.
Model radar targets with increasing levels of fidelity. The example introduces the concept of radar cross sections (RCS) for simple point targets and extends it to more complicated cases of
Uses the phased.Platform System object™ to model the change in range between a stationary radar and a moving target. The radar is located at (1000,1000,0) and has a velocity of (0,0,0) . The
Beginning with a simple example, model the motion of a platform over ten time steps. To determine the time step, assume that you have a pulse transmitter with a pulse repetition frequency
Determine the position of a target in local spherical coordinates centered at the phase center of a URA array. The center of the URA defines the origin of the local coordinate system and has the
Determine the position of a target in rectangular coordinates in the global coordinate system. First, specify the local spherical coordinates of a target with respect to a URA. The center of