IEEE - Aerospace and Electronic Systems - August 2023 - 34
Incremental Deinterleaving of Radar Emitters
Figure 7.
Incremental clustering ofAOA and PW with different amount ofFA pulses.
proposed deinterleavers achieve ARI values above 0.9 and
also work well for an FAR of 1000.
REACTION TIME
The intent of incremental processing is to reduce the reaction
time of the deinterleaver, that is, the time between an
emitter is first received to the time when the deinterleaver
outputs a result. Table 1 lists the improvement in the reaction
time, which depends on the PRF. Again we assume a
comparably short batch observation time of 100 ms and a
minimum amount of six pulses to detect a cluster. For this
case incremental processing can reduce the average reaction
time from 50 ms to values between a few ten microseconds
to a few milliseconds. Note that for other system
setups with shorter observation time, the improvement in
reaction time can be smaller.
ALGORITHM PARAMETERS ROBUSTNESS
Clustering algorithms typically have some user parameters,
that need to be tuned by the developer. Some
parameters are uncritical, that is, their choice has only
very little influence on the clustering result,
Table 1.
Estimated Reaction Time for an Observation Time of
100 ms and a Minimum Number of Six Pulses to
Detect a Cluster
Deinterleaver
PRF
1 kHz 10 kHz 100 kHz
Nonincremental 50 ms 50 ms 50 ms
Incremental
34
6 ms 0.6 ms 0.06 ms
Figure 8.
Parameter robustness analysis for clustering with AOA and PW
(FAR=100).
IEEE A&E SYSTEMS MAGAZINE
AUGUST 2023
for example, min pts (DBSCAN), a (leader), or the
choice parameter (FART) (cf., Algorithms 1, 2,and 3).
Other parameters potentially have a larger impact on
the result. These are as follows:
DBSCAN: eps radius;
Leader: eps radius;
FART: vigilance threshold r.
IEEE - Aerospace and Electronic Systems - August 2023
Table of Contents for the Digital Edition of IEEE - Aerospace and Electronic Systems - August 2023
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