Research on detection performance of passive detection system based on troposcatter

Liu, Zan; Chen, Xihong; Li, Chenglong; Liu, Qiang

doi:10.1016/j.aeue.2018.08.008

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…Ref. 14 employs several observations locating in different zones to show the performance of Hopfield model and ITU model. The consequences indicate that the former has obvious advantages.…”

Section: Operating Range Of Passive Detection Systemmentioning

confidence: 99%

Prediction on operating range of passive troposcatter detection system

Liu

Chen

2018

Int. J. Microw. Wireless Technol.

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Electromagnetic wave of enemy radar propagated by troposcatter is a valuable candidate for beyond line-of-sight detection. There is no analytical study considering the operating range of passive troposcatter detection system. In this paper, we study the way to predict the operating range, which is dominated by propagation loss. The key propagation loss models including statistic model and real-time model are analyzed. During deducing the latter loss model, Hopfield model is introduced to precisely describe the tropospheric refractivity. Meanwhile, rain attenuation is also taken into consideration. Several examples demonstrate the feasibility of predicting operating range through the proposed method.

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“…Ref. 14 employs several observations locating in different zones to show the performance of Hopfield model and ITU model. The consequences indicate that the former has obvious advantages.…”

Section: Operating Range Of Passive Detection Systemmentioning

confidence: 99%

Prediction on operating range of passive troposcatter detection system

Liu

Chen

2018

Int. J. Microw. Wireless Technol.

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“…Troposcatter as a promising beyond-line-of-sight (b-LOS) communication link has been well studied [1,2]. On the basis of electromagnetic (EM) wave radiated by hostile radiator and propagated by troposcatter, passive surveillance can realize b-LOS location [3,4]. Direction of arrival (DOA) estimation with high performance is the prerequisite of a passive surveillance system [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

An Efficient DOA Estimation Method for Passive Surveillance System Based on Troposcatter

Liu

Chen

et al. 2021

Mathematical Problems in Engineering

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Direction of arrival (DOA) estimation plays an important role in the passive surveillance system based on troposcatter. Rank deficiency and subspace leakage resulting from multipath propagation can deteriorate the performance of the DOA estimator. In this paper, characteristics of signals propagated by troposcatter are analyzed, and an efficient DOA estimation method is proposed. According to our new method, the invariance property of noise subspace (IPNS) is introduced as the main method. To provide precise noise subspace for INPS, forward and backward spatial smoothing (FBSS) is carried out to overcome rank deficiency. Subspace leakage is eliminated by a two-step scheme, and this process can also largely reduce the computational load of INPS. Numerical simulation results validate that our method has not only good resolution in condition of closely spaced signals but also superior performance in case of power difference.

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A Survey and analysis on a troposcatter propagation model based on ITU-R recommendations

Lee

Noh

2023

ICT Express

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Research on detection performance of passive detection system based on troposcatter

Cited by 4 publications

References 18 publications

Prediction on operating range of passive troposcatter detection system

Prediction on operating range of passive troposcatter detection system

An Efficient DOA Estimation Method for Passive Surveillance System Based on Troposcatter

A Survey and analysis on a troposcatter propagation model based on ITU-R recommendations

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