Omni-directional Angle Measurement Algorithm under Interference with Double Circular Arrays

Tian Chao; Wen Shu-liang

doi:10.11999/JEIT141375

Volume 37 Issue 7

Jul. 2015

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Article Navigation > Journal of Electronics & Information Technology > 2015 > 37(7): 1751-1756

Tian Chao, Wen Shu-liang. Omni-directional Angle Measurement Algorithm under Interference with Double Circular Arrays[J]. Journal of Electronics & Information Technology, 2015, 37(7): 1751-1756. doi: 10.11999/JEIT141375

Citation:

Tian Chao, Wen Shu-liang. Omni-directional Angle Measurement Algorithm under Interference with Double Circular Arrays[J]. Journal of Electronics & Information Technology, 2015, 37(7): 1751-1756. doi: 10.11999/JEIT141375

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Omni-directional Angle Measurement Algorithm under Interference with Double Circular Arrays

doi: 10.11999/JEIT141375

Tian Chao¹,
Wen Shu-liang¹

Received Date: 2014-10-29
Rev Recd Date: 2015-02-06
Publish Date: 2015-07-19

Abstract

Abstract

If the azimuth angle between the interference and the detected target is small, the energy of the received signal reflected by the target may have a great loss when the interference is cancelled for an omni-directional VHF radar with single circular array. To resolve this problem, an improved algorithm based on double circular arrays is proposed. The algorithm firstly utilizes the excited phase mode -1, 0 and 1 of the small array to estimate a rough azimuth angle of the interference, and then acquires an accurate one by symmetrical phase modes of high orders of the large array. Finally, interference cancellation and estimation of targets azimuth angle are fulfilled via unsymmetrical phase modes of the large array. Compared with the algorithm based on single array, the proposed algorithm can reduce the energy loss of the useful signal and increase the estimation precision of targets azimuth angle. Simulation results demonstrate the effectiveness of the proposed algorithm.
- Radar,
- Double circular arrays,
- Interference cancellation,
- Omni-directional angle measurement,
- Angle ambiguity

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References(22)

References

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