IEEE - Aerospace and Electronic Systems - September 2023 - 44
Radar Challenges, Current Solutions, and Future Advancements for the Counter Unmanned Aerial Systems Mission
SIMULTANEOUS TRACKING OF MULTIPLE UAS
GROUPS
CHALLENGES
Some C-UAS applications require simultaneous tracking of
UAS targets spanning different groups. Examples include
Groups 1 and 2, Groups 3-5, andGroups 1-5. For applications
requiring simultaneous tracking performance for Groups 1
and 2, and Groups 3-5 a single mode can typically detect and
track UAS with good performance. Simultaneously detecting
and tracking Groups 1-5 is more challenging. The range of
RCS sizes, maximum velocities, and maximum altitudes
make this a challenge for a single mode. This is because the
number of beams required dramatically decreases the scan
rate. The mode can be optimized for Groups 1 and 2 or
Groups 3-5, but the nonoptimized groupwill suffer.
EXISTINGSOLUTIONS
Figure 13.
Scan Fence example for air defense applications. C-UAS radars
employ this approach.
their rapid scan capability [36]. AESA radars are therefore
the preferred radar of choice for C-UAS applications.
If the scan rate degradation from adding more search
beams is to great even for an AESA radar, another approach
is to add dedicated track beams. When UAS targets that are
being tracked leave the search fence coverage area, a dedicated
track beam can be used for the UAS target while still
executing track while scan (TWS). For this approach, an
AESA is also required for operational implementation.
Overcoming this challenge is accomplished using twodifferent
approaches. The first approach is to use two different
modes, each optimized for either Groups 1 and 2, or
Groups 3-5. For a single radar this approach does not provide
simultaneous coverage and is suboptimal. However, in
applications where multiple vehicles are used, the radar on
each vehicle can use a different mode and collectively provide
the required coverage. Figure 14 illustrates the modes
for this approach. The second approach is to use a single
mode to provide the simultaneous coverage. To overcome
the challenges previously discussed, this can be accomplished
by interleaving modes with waveforms that are tailored
to different targets. For Groups 1 and 2, the waveform
used would have a shorter maximum range, requiring a
Figure 14.
Twomodes when used simultaneously on different vehicles or in a single mode with interleaving provide the desired coverage ofGroups 1-5.
44
IEEE A&E SYSTEMS MAGAZINE
SEPTEMBER 2023
IEEE - Aerospace and Electronic Systems - September 2023
Table of Contents for the Digital Edition of IEEE - Aerospace and Electronic Systems - September 2023
Contents
IEEE - Aerospace and Electronic Systems - September 2023 - Cover1
IEEE - Aerospace and Electronic Systems - September 2023 - Cover2
IEEE - Aerospace and Electronic Systems - September 2023 - Contents
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IEEE - Aerospace and Electronic Systems - September 2023 - Cover3
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