Potential characteristics of direction finder with interference compensator and a direction finder with an adaptive antenna array with limitations in the event of interference in the main lobe of the antenna pattern

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Abstract

The displacement of the bearing estimate in a direction finder with an adaptive noise compensator, its sensitivity and the sensitivity of a direction finder with an adaptive antenna array with restrictions have been studied depending on the antenna radiation pattern, the angular position of the signal and local interference, the correlation of distributed noise and spectral densities of signal power, noise and interference. A comparative analysis of the accuracy and sensitivity of these direction finders in the event of interference in the main lobe of the antenna pattern was carried out for a linear equidistant antenna array.

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About the authors

E. N. Kalenov

Joint-Stock Company Andreev Acoustics Institute

Author for correspondence.
Email: kalenov@kgfi.ru
Russian Federation, Shvernik Str., 4, Moscow, 117449

References

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2. Fig. 1. The family of a direction-finding characteristics of the radar with automatic for angular distances between signal and interference with ∆β = 0.05∆R (1), 0.25∆R (2), 0.45∆R (3), 0.7∆R (4) and 1.0∆R (5); curve 6 – HRP in the noise field.

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3. Fig. 2. The family of a direction-finding characteristics finder with AAP for the limitation of the angular distances between the signal and the interference with ∆β = 0.05∆R (1), 0.25∆R (2), 0.45∆R (3), 0.7∆R (4) and 1.0∆R (5) for S0(f0) = N(f0)/M, S1(f0) = N(f0); curve 6 – HRP in the noise field.

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4. Fig. 3. Dependences of the offset of the bearing estimate in the direction finder with automatic transmission on the angular distance ∆β between the signal and the interference for S0(f0) = N(f0)/M and S1(f0) = N(f0) (curve 1) and S1(f0) = N(f0)/M (curve 2).

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5. Fig. 4. Dependence of the sensitivity of the direction finder with AAR with restriction (1) and the direction finder with automatic transmission (2) on the angular distance Δβ between the signal and interference for S0(f0) = N(f0)/M), S1(f0) = N(f0), line 3 – potential sensitivity direction finder in the noise field.

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6. Fig. 5. Dependence of the accuracy of the direction finder with AAR with restriction (1) and the direction finder with automatic transmission (2) on the angular distance ∆β between the signal and the interference, normalized to the potential accuracy of the direction finder in the noise field for the case N(f0) >> S0(f0)M; line 3 is the normalized accuracy of direction finding in the noise field for the case N(f0) >> S0(f0)M).

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