# Polarization based direction of arrival estimation using a radio interferometric array

arXiv: https://arxiv.org/abs/2510.15116 · HTML: https://mlsanity.com/paper/2510.15116/

## Key facts

- No citing papers in the map yet (data through 14 Oct 2026).
- Builds on 6 of its 39 references that are in the map.
- First posted on arXiv 16 Oct 2025.

## Builds on (most cited first, 6 of 6)

- [Attention Is All You Need](https://mlsanity.com/paper/1706.03762/) (2017)
- [Adam: A Method for Stochastic Optimization](https://mlsanity.com/paper/1412.6980/) (2014)
- [DA-MUSIC: Data-Driven DoA Estimation via Deep Augmented MUSIC Algorithm](https://mlsanity.com/paper/2109.10581/) (2021)
- [Near-field Tracking with Large Antenna Arrays: Fundamental Limits and Practical Algorithms](https://mlsanity.com/paper/2102.05890/) (2021)
- [DOA Estimation with Non-Uniform Linear Arrays: A Phase-Difference Projection Approach](https://mlsanity.com/paper/2102.03650/) (2021)
- [Energy and polarization based on-line interference mitigation in radio interferometry](https://mlsanity.com/paper/2412.14775/) (2024)

## Abstract (arXiv)

Direction of arrival (DOA) estimation is mostly performed using specialized arrays that have carefully designed receiver spacing and layouts to match the operating frequency range. In contrast, radio interferometric arrays are designed to optimally sample the Fourier space data for making high quality images of the sky. Therefore, using existing radio interferometric arrays (with arbitrary geometry and wide frequency variation) for DOA estimation is practically infeasible except by using images made by such interferometers. In this paper, we focus on low cost DOA estimation without imaging, using a subset of a radio interferometric array, using a fraction of the data collected by the full array, and, enabling early determination of DOAs. The proposed method is suitable for transient and low duty cycle source detection. Moreover, the proposed method is an ideal follow-up step to online radio frequency interference (RFI) mitigation, enabling the early estimation of the DOA of the detected RFI.