An Off-Grid DOA Estimation Based on Iterative Adaptive Approach

JIE Yunkang; ZHANG Wen; LI Xiang; YE Xiaodong; WANG Hao; TAO Shifei

doi:10.11999/JEIT221061

Volume 45 Issue 10

Oct. 2023

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Article Navigation > Journal of Electronics & Information Technology > 2023 > 45(10): 3805-3811

JIE Yunkang, ZHANG Wen, LI Xiang, YE Xiaodong, WANG Hao, TAO Shifei. An Off-Grid DOA Estimation Based on Iterative Adaptive Approach[J]. Journal of Electronics & Information Technology, 2023, 45(10): 3805-3811. doi: 10.11999/JEIT221061

Citation:

JIE Yunkang, ZHANG Wen, LI Xiang, YE Xiaodong, WANG Hao, TAO Shifei. An Off-Grid DOA Estimation Based on Iterative Adaptive Approach[J]. Journal of Electronics & Information Technology, 2023, 45(10): 3805-3811. doi: 10.11999/JEIT221061

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An Off-Grid DOA Estimation Based on Iterative Adaptive Approach

doi: 10.11999/JEIT221061

1.
School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2.
Northern Institute of Electronic Equipment of China, Beijing 100191, China

Funds: The National Key Research and Development Program (2021YFB3502500)

Received Date: 2022-08-12
Accepted Date: 2023-01-11
Rev Recd Date: 2022-12-22

Available Online: 2023-01-14

Publish Date: 2023-10-31

Abstract

Abstract

According to the problems that the mismatch between the real source location and the dictionary grid leads to the great error of Direction Of Arrival (DOA), an Off-Grid DOA estimation based on modified Iterative Adaptive Approach (IAA) is proposed (OGIAA). Firstly, the signal power spectrum obtained by the IAA is modified, and the corresponding grid angle of the peak power is read out as the coarse estimation results. Then, the square error cost function is expanded to the second order Taylor expansion and minimized to obtain the initial offset. Finally, the power component and offset are optimized alternately to achieve high precision off grid DOA estimation. Theoretical analysis and simulation results show that the implementation process of this method is simple, and it can accurately estimate the source angle of the migration grid without regularization parameters. It also has higher estimation accuracy on non-uniform arrays with more degrees of freedom.
- Direction Of Arrival (DOA) estimation,
- Off-Grid (OG),
- Iterative Adaptive Approach (IAA)

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References(22)

References

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