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| Wideband Azimuth and Polarization Joint Estimation of Conformal Array |
| HOU Wenlin1,2,GUO Ying2,ZHANG Kunfeng2,HU Yue1,2,ZHANG Ling2
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| (1.Dalian Airforce Commnication NCO Academ, Dalian 116600, Liaoning, China;
2.Institute of Information and Navigation, Air Force Engineering University, Xi’an 710077, China) |
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Abstract Abstract： Taking into account the direction of arrival (DOA) of wideband signals for conformal array antenna, a joint DOA and polarization estimation algorithm was proposed. First, the narrow subband was acquired by using the short time Fourier transformation (STFT). Then, two sets of snapshots which satisfied rotation invariance were construsted via timedelayed signal. So the array steering matrices corresponding respectively to different narrow subbands were estimated. Furthermore, making use of the frequency difference of different narrow subbands, the 2D DOA and polarization estimation were acquired jointly. The proposed method can be applied to arbitrary conformal array structure without parameter matching and searching process. The algorithm can also reduce the computational complexity considerably and can efficiently improve the practical engineering value. MonteCarlo simulation demonstrates the good performance and the effectiveness of the proposed method.
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Received: 25 September 2015
Published: 28 May 2016
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