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Digital TV Signal Based Airborne Passive Radar Clutter Suppression via a Parameter-Searched Algorithm

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Abstract

Caused by the platform movement, slowly moving targets on the ground will be hidden by the stationary clutter in the Doppler domain for an airborne passive radar system. In this paper, the signal model of airborne passive radar used for ground moving target indication purpose is established at first. Then, the space–time adaptive processing technique is adopted to suppress the strong clutter. Because of the poorer range resolution than active radar, independently and identically distributed training range cells are more difficult to obtain for passive radar. To address this problem, the sparsity of clutter in the space–time domain is exploited and a jointly sparse matrix recovery model is introduced. Furthermore, a parameter-searched two-dimensional multiple measurement vectors based orthogonal matching pursuit (MOMP) algorithm is proposed to solve the off-grid (basis mismatch) problem and reduce the computational complexity at the same time, and thus to more accurately and effectively estimate the clutter covariance matrix. Simulation results with digital TV signal as the illuminator source are shown to demonstrate the effectiveness of the proposed algorithm to determine the Doppler frequency, spatial frequency, and relative bistatic range of the moving targets on the ground.

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Availability of data and materials

The simulation data of program used to support the findings of this study are available from the corresponding author upon request.

Code availability

The codes are available from the corresponding author upon request.

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Funding

This work was supported in part by the National Natural Science Foundation of China under Grants 62001507 and 61901511, in part by the Natural Science Basic Research Plan in Shaanxi Province of China under Grant 2020JQ-478, and in part by the Aeronautical Science Foundation of China under Grant No. 20200001096001.

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Authors and Affiliations

  1. Air and Missile Defense College, Air Force Engineering University, Xi’an, China

    Dingding Qi, Weike Feng & Changan Shang

  2. Equipment Management and UAV Engineering College, Air Force Engineering University, Xi’an, China

    Boyu Feng

  3. Air Traffic Control and Navigation College, Air Force Engineering University, Xi’an, China

    Zhihao Zhang & Xingyu He

Authors
  1. Dingding Qi
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  2. Boyu Feng
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  3. Weike Feng
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  4. Zhihao Zhang
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  5. Xingyu He
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  6. Changan Shang
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Contributions

DQ proposed the method, did the simulations, and wrote the manuscript; BF, ZZ, and XH provided suggestions for signal processing and reviewed the manuscript; WF and CS guided the research, gave some suggestions, and reviewed the manuscript.

Corresponding author

Correspondence to Boyu Feng.

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Qi, D., Feng, B., Feng, W. et al. Digital TV Signal Based Airborne Passive Radar Clutter Suppression via a Parameter-Searched Algorithm. Wireless Pers Commun 120, 3189–3216 (2021). https://doi.org/10.1007/s11277-021-08607-9

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