Aerospace and Electronic Systems Magazine July 2018 - 38
Hybrid Guidance System Based on Infrared and Millimeter Waves
direction angle was defined as a coordinate system angle. According to values
presented in Table 1, the peak side-lobe
level within the scanning range was below −16 dB.
The normalized gain of the antenna
array for different directions is presented in Figure 6. The total array gain was
39.42 dB, while the sparse array gain
was 29.07 dB, whereby the gain is represented relative to the gain of the ideal
isotropic antenna. Efficiency was not
considered, and gain was calculated by
simulations. However, in our experience,
the real gain of the sparse antenna array
might be higher than the simulated gain
because of coupling and other factors that
influence the antenna radiation pattern.
AUTOMATIC TARGET RECOGNITION
In this section, the automatic target recognition algorithms for both infrared
detection and millimeter detection are
analyzed in detail. Signal processing,
including infrared imaging and millimeter wave guidance, was used to achieve
high-precision target detection and recognition. In this article, a series of automatic target recognition algorithms Figure 5.
based on deep learning are proposed for Schematic diagram of the sparse array.
a novel guidance system.
In addition, a new recognition technology for sensitive target
VISUAL FEATURE EXTRACTION AND ACCELERATION
detection and missile fighting is presented, along with physical and
BASED ON DEEP LEARNING
mathematical models involving target and environment. The new
sensitive target detection and recognition technology is based on
Selection of features based on deep learning provides better deteca classical method, but it overcomes the limitations of the classition and recognition performance than selection based on artifical method that relate to automatic target identification in complex
cial selection methods [18]. A depth convolution neural network
ground environments.
(CNN) was used for feature extraction. The typical CNN structure
Table 1.
Scanning Results for Peak Side-Lobe Level
Azimuth
Pitch Angle
0°
38
5°
10°
15°
20°
25°
0°
−16.44
−16.32
−16.44
−16.33
−16.44
−16.36
5°
−16.35
−16.22
−16.35
−16.23
−16.34
−16.25
10°
−16.44
−16.36
−16.44
−16.34
−16.44
−16.35
15°
−16.36
−16.25
−16.37
−16.27
−16.35
−16.29
20°
−16.44
−16.34
−16.44
−16.34
−16.44
−16.36
25°
−16.37
−16.27
−16.37
−16.30
−16.35
−16.31
IEEE A&E SYSTEMS MAGAZINE
JULY 2018
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