CSI-based passive intrusion detection bound estimation in indoor NLoS scenario

Gui, Linqing; Yuan, Wenyang; Xiao, Fu

doi:10.1016/j.fmre.2022.05.015

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…From Equation (15), the FA signal after pulse rearrangement and motion compensation can be regarded as the stepped-frequency signal. Therefore, by performing a discrete Fourier transform (DFT) on (15) we can obtain the target HRRP as…”

Section: Hrrp Generationmentioning

confidence: 99%

“…With tremendous advances in hardware and signal-processing technology, PBRs are extensively deployed for air traffic control, coastal/maritime protection, and terrestrial vehicle surveillance [8,9]. At present, a variety of IOs, such as frequency modulation (FM) [10,11], digital television terrestrial multimedia broadcasting (DTMB) [12,13], long-term evolution (LTE) [14], WiFi [15] and global navigation satellite system (GNSS) [16][17][18], are suitable for PBR systems because of their close-to-ideal ambiguity function. Additionally, due to the high power (FM, DTMB), wide bandwidth (LTE), high carrier frequency, and easy accessibility (WiFi) of these signal sources, they have been extensively used in airspace target warning, sea target detection, low-altitude drone monitoring, and indoor safety applications, garnering significant interest from radar researchers.…”

Section: Introductionmentioning

confidence: 99%

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A Coherent Integration Method for Moving Target Detection in Frequency Agile Signal-Based Passive Bistatic Radar

Zuo,

Li,

Tan

et al. 2024

Remote Sensing

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In this paper, the possibility of improving target detection performance in passive bistatic radar by exploiting a frequency agile (FA) signal is investigated, namely frequency agile signal-based passive bistatic radar (FAPBR) coherent integration. Since the carrier frequency of each pulse signal is agile, FAPBR coherent integration suffers from the problems of random range and Doppler phase fluctuations. To tackle these challenges, a novel FA signal coherent integration target detection scheme for PBR is proposed. In particular, the phase quadratic difference principle is presented for eliminating Doppler phase hopping. Then, frequency rearrangement is adopted to compensate for random range phase fluctuation while obtaining the high-range-resolution profiles (HRRPs) of the detecting target. Further, we innovatively present a sliding-range ambiguity decoupling (S-RAD) method to remove the range ambiguity effect in the case of the high pulse repetition frequency (HPRF). Compared with the existing methods, the proposed method can effectively mitigate Doppler phase hopping without requiring prior target velocity information, offering improved coherent integration performance in frequency agile signals with reduced computational complexity. Moreover, it successfully corrects the range ambiguity issue caused by HPRF. Finally, a series of simulation results are presented to demonstrate the effectiveness of the proposed algorithm.

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Section: Hrrp Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Coherent Integration Method for Moving Target Detection in Frequency Agile Signal-Based Passive Bistatic Radar

Zuo,

Li,

Tan

et al. 2024

Remote Sensing

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“…Although the intruder does not carry any equipment, passive intrusion detection methods can still detect the intrusion. Passive intrusion detection methods have received more attention [9]. For hazards such as harmful gas leakage, toxic gas sensors are installed in the building, and an alarm is issued when the harmful gas concentration reaches the safety limit [10].…”

Section: Introductionmentioning

confidence: 99%

The Digital Twin Modeling Method of the National Sliding Center for Intelligent Security

Liu

Sun

et al. 2023

Sustainability

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There are some problems in the security management of large stadiums, such as complex situations and a lack of coordination among systems. An intelligent security system can effectively improve the efficiency of security management. The digital twin concept is applied to intelligent security systems in large stadiums, and an intelligent security modeling method for large stadiums based on digital twin is proposed. The modeling method of the physical model is presented for the security equipment and building entities. The virtual model is based on geometric, physical, behavioral, and rule models. Considering the particularity of building security, the environmental model is added to describe the environmental information. The application mode of the digital twin model is proposed. In the security management process, multi-source data and virtual models are integrated to analyze and control the security management process of buildings, forming a closed loop of “perception-analysis-control” in security management. Taking the National Sliding Center as an example, this paper verifies the digital twin model and its operation mode of intelligent building security through several possible situations in the operation process of the stadium. The analysis of security data and evacuation path guidance in emergencies are simulated. The digital twin model for intelligent security integrated the building security data and simulation models to assist in identifying the types of dangers and the treatment of emergencies. Furthermore, the control of building equipment was integrated into the security system. The digital twin model for intelligent security improved the integration and intelligence of the security system.

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“…Currently, modeling of multipath signals primarily relies on linear tracking models [29][30][31]. However, these studies do not take into account the influence of multipath coherent sources on signal processing.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electromagnetic Wave and Multipath Suppression from Overhead Perspective

Luo,

Zhang,

Ren

et al. 2023

Remote Sensing

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The multipath problem in indoor target detection has always been a long-standing research hotspot. Although there are many solutions to the multipath problem in a horizontal line of sight, the multipath problem of single-station radar from an overhead perspective still needs to be solved. At present, there is a lack of detailed analysis on the multipath propagation law of electromagnetic waves from an overhead perspective. This paper first analyzes the multipath propagation law of overhead perspective and reveals a combination multipath propagation phenomenon that is easily overlooked, which is formed by walls, ground, and targets. In addition, during the analysis process, the influence of coherent sources generated by multipath on angle estimation was fully considered, and verified through simulation and measured data. Then, based on the result of propagation analysis, this paper proposes a multipath ghost target suppression method. This method first establishes a multipath ghost target location dictionary based on building information, and then matches the tracking results with the dictionary to suppress successfully matched multipath ghost targets. Finally, several experiments are carried out to verify the effectiveness of this method.

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CSI-based passive intrusion detection bound estimation in indoor NLoS scenario

Cited by 8 publications

References 10 publications

A Coherent Integration Method for Moving Target Detection in Frequency Agile Signal-Based Passive Bistatic Radar

A Coherent Integration Method for Moving Target Detection in Frequency Agile Signal-Based Passive Bistatic Radar

The Digital Twin Modeling Method of the National Sliding Center for Intelligent Security

Analysis of Electromagnetic Wave and Multipath Suppression from Overhead Perspective

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