研究目的
Investigating the optimal method for detecting objects of microwave radiation in a Ratio-type radiometer with an unstable receiver gain.
研究成果
The study concludes that the developed algorithm allows for reliable detection of objects against the background of the sky with high reliability. However, detection against the background of snow requires more detailed investigation.
研究不足
The research is limited by the technical constraints of the radiometric detector and the conditions of the experiment, such as the background temperature and the distance between the object and the receiver.
1：Experimental Design and Method Selection:
The study synthesizes an optimal algorithm for detecting microwave radiation objects based on the likelihood ratio criterion. It includes the development of a structural scheme and probabilistic detection characteristics.
2：Sample Selection and Data Sources:
The research involves detecting objects against the background of the sky and snow, using a radiometric receiver operating at 95,5 ? 96,5 GHz frequencies.
3：List of Experimental Equipment and Materials:
The equipment includes a horn antenna, a modulator based on the PIN diode, a Gunn oscillator, a mixer, an intermediate frequency amplifier, an envelope detector, and a low frequency amplifier.
4：Experimental Procedures and Operational Workflow:
The experiment involves calibration of the equipment, detection of objects against the background of the sky and snow, and analysis of the measurement results.
5：Data Analysis Methods:
The study analyzes the probability characteristics of detection, including the probability of false alarms and the probability of correct detection.
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horn antenna
Used for receiving microwave radiation signals.
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modulator based on the PIN diode
Modulates the received signal for further processing.
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Gunn oscillator
Generates microwave signals for the radiometric receiver.
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mixer
Combines signals from different sources for processing.
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intermediate frequency amplifier
Amplifies the intermediate frequency signal for detection.
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envelope detector
Detects the envelope of the signal for further analysis.
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low frequency amplifier
Amplifies the low frequency signal for output.
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