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Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

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A cluster-based direct source localization approach for large-aperture horizontal line arrays.

Lu Wang¹, Yixin Yang¹, Xionghou Liu¹

¹School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, Chinawanglutara@mail.nwpu.edu.cn, yxyang@nwpu.edu.cn, xhliu@nwpu.edu.cn.

The Journal of the Acoustical Society of America

|February 3, 2020

Summary

A new cluster-based coherent MUSIC direct position determination (DPD) approach improves source localization with large-aperture arrays. This method addresses challenges from unfavorable array configurations and split beam issues, enhancing accuracy.

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Area of Science:

Acoustics
Signal Processing
Array Signal Processing

Background:

Source localization using direct position determination (DPD) with large-aperture horizontal line arrays presents challenges.
Decentralized DPD methods can suffer from split beam problems due to unfavorable array configurations and large inter-element spacing.

Purpose of the Study:

To propose a novel cluster-based coherent MUSIC DPD approach.
To address and overcome the limitations of existing DPD methods in handling unfavorable array configurations.

Main Methods:

Dividing a large-aperture array into smaller coherent clusters.
Applying a coherent MUSIC algorithm within these clusters to maintain covariance lag.
Utilizing decentralized direct position determination (DPD) strategies.

Main Results:

The proposed cluster-based coherent MUSIC DPD approach effectively handles unfavorable array configurations.
Experimental results using SWellEx96 data show a significant performance gain compared to traditional methods.
The method maintains the largest covariance lag, crucial for accurate localization.

Conclusions:

The cluster-based coherent MUSIC DPD approach offers a robust solution for source localization with large-aperture arrays.
This technique mitigates issues arising from array configuration complexities and inter-element spacing.
The findings demonstrate the practical utility and performance enhancement of coherent cluster processing in array signal processing.