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Angle-of-Arrival Estimation of Multipath Signals in A Passive Coherent Location System Using OFDM-Based Illuminators

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Abstract

Terrestrial multipath interference is inevitably problematic in passive coherent location (PCL) systems because it can overwhelm target signals and cause detection errors. However, angle-of-arrival (AOA) information about multipath signals can be used to reduce detection errors in PCL systems. This work proposes a new method of identifying AOA multipath components for PCL systems with OFDM-based illuminators. Use of a 3-element array deployed as an equilateral triangle enables accurate estimation of AOA information for multipath signals. Notably, the number of AOA estimations can far exceed the number of array elements. Simulation results confirm the effectiveness of the proposed method.

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Acknowledgments

The authors would like to thank the anonymous reviewers for their valuable and constructive comments, which helped to improve the presentation of the paper. This work is partially supported by the National Science Council of Taiwan under grant no. NSC 102-2221-E-011-093 and NSC 102-2623-E-155-002-D.

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  1. Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, 106, Taiwan

    Meng-Chang Hua, Hsin-Chin Liu & Cheng-Han Hsu

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  1. Meng-Chang Hua
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  2. Hsin-Chin Liu
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  3. Cheng-Han Hsu
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Correspondence to Meng-Chang Hua.

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Hua, MC., Liu, HC. & Hsu, CH. Angle-of-Arrival Estimation of Multipath Signals in A Passive Coherent Location System Using OFDM-Based Illuminators. Wireless Pers Commun 77, 889–906 (2014). https://doi.org/10.1007/s11277-013-1542-9

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