Installation Guide

AIMS Fast-Scan Radar v3.22 Installation and Operations Manual
DMT, LLC • DMT-M200-311 • 08/2009
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5.3.2.4 Smoothing Filters
5.3.2.5 A/D Board Options
5.3.2.6 Change Tracker Settings
The Processing tab, Figure 1, contains options for the Matched Filter, FFT (Fast Fourier
Transform) processing, applying a DC Offset, and a Speed Threshold. The Advance Processing
Tab, Figure 19, contains Smoothing Filters, Ramp Functions, ClutterX options.
Apply DC Offset is an algorithm ensures that the In-phase and Quadrature (I/Q) channels of the
radar are well balanced and centered and 0 volts. Unbalanced and non-centered channels will
result processing sidelobes, which can generate false alarms. The in-Range option is a
traditional implementation of the algorithm, whereas, the across-Pulses is a better performing
implementation of the algorithm. DMT recommends that Apply DC Offset is always enabled
(checked) and across-Pulses is selected.
The Use Speed Threshold is an option that can be used to focus on targets of interest. The
threshold limits reported detections to targets traveling slower than the threshold speed; for
example only targets traveling 10mph or slower.
Figure 1 - Processing Options
Decimate Data does affect (reduces) the resolution of the system by elimination of the sliding
window. DMT recommends that Decimate Data be disabled for most sites and should only be
enabled when high rotation speed becomes critical.