Abstract
A chaotic radar system has been developed for through-wall detection and ranging of targets. The chaotic signal generated by an improved Colpitts oscillator is designed as a probe signal. Ranging to target is achieved by the cross-correlation between the time-delayed reflected return signal and the replica of the transmitted chaotic signal. In this paper, we explore the performance of the chaotic radar system for target detection and ranging through lossy media. Experimental results show that the designed chaotic radar has the advantages of high range resolution, unambiguous correlation profile, and can be used for through wall target detection and sensing.
Highlights
Through wall radar systems have wide applications in anti-terrorism, law enforcement, and security operations [1]
The ability of range finding in free space is first investigated to demonstrate the performance of our chaotic radar system
The microwave chaotic signal is generated by an improved Colpitts oscillator
Summary
Through wall radar systems have wide applications in anti-terrorism, law enforcement, and security operations [1]. Such systems must be immune from jamming and external electromagnetic interference in a spectrally dense environment. By transmitting a random noise signal with an ultra wide band (UWB), the radar system has high range resolution and excellent ability to detect and recognize different types of small targets [2]. Noise waveform has inherent immunity ability from detection, unintended interference, and hostile jamming. Several through wall random noise radar systems have been designed and constructed to realize through wall ranging and imaging [3,4,5]
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