Many aspects of the intruder detection system (IDS) based on the LCX sensor are still unknown due to its complex propagation characteristics. In order to study the field disturbance mechanism of human intruder and to reduce the phase error caused by the initial state of the detection signal, a novel method of improving the localization accuracy is proposed. At the frequencies of 40, 100, and 200 MHz, the IDS based on the LCX sensor is proposed by analyzing the scattering characteristics of the radar cross section (RCS) of human intruder and using IQ demodulation method. According to the characteristics of the IDS, the RCS is obtained by irradiating the human intruder from three typical radiation directions, which are front, side, and low‐side direction in the mentioned frequency range. Combined with the method of pulse accumulation and synchronous subtraction, the intruder localization can be easily realized by using pulse delay positioning method. The results demonstrate the improvement in localization accuracy and the decrement in false positive rate, and the positioning error is less than 1 m.

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intruder detection system radiation directions false positive rate lcx sensor synchronous subtraction complex propagation decrement scattering characteristics of the radar cross section rcs of human intruder ids rcs localization accuracy pulse delay positioning iq demodulation

Qiao Guan, Hongmin Lu, Chongchong Chen, Kunbo Wang,.Research on human intruder detection and localization based on LCX sensor. 28 (28),.

Qiao Guan, Hongmin Lu, Chongchong Chen, Kunbo Wang,"Research on human intruder detection and localization based on LCX sensor" 28

Qiao Guan, Hongmin Lu, Chongchong Chen, Kunbo Wang,"Research on human intruder detection and localization based on LCX sensor"