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In this paper, we propose a new beam allocation strategy aiming to maximize the average successful tracking probability (ASTP) of time-varying millimeter-wave MIMO systems. In contrast to most existing works that employ one…

Signal Processing · Electrical Eng. & Systems 2019-07-02 Deyou Zhang , Ang Li , He Chen , Ning Wei , Ming Ding , Yonghui Li , Branka Vucetic

Apart from the conventional parameters (such as signal-to-noise ratio, array geometry and size, sample size), several other factors (e.g. alignment of the antenna elements, polarization parameters) influence the performance of direction of…

Signal Processing · Electrical Eng. & Systems 2022-03-15 Md Imrul Hasan , Mohammad Saquib

Localizing near-field sources considering practical arrays is important in wireless communications. Array-based apertures exhibit mutual coupling between the array elements, which can significantly degrade the performance of the…

Signal Processing · Electrical Eng. & Systems 2024-07-30 Zohreh Ebadi , Amir Masoud Molaei , Muhammad Ali Babar Abbasi , Simon Cotton , Anvar Tukmanov , Okan Yurduseven

Preference alignment is usually achieved by weight-updating training on preference data, which adds substantial alignment-stage compute and provides limited mechanistic visibility. We propose Dynamic SAE Steering for Preference Alignment…

Machine Learning · Computer Science 2026-03-24 James Wedgwood , Aashiq Muhamed , Mona T. Diab , Virginia Smith

Path smoothness is often overlooked in path imitation learning from expert demonstrations. In this paper, we introduce a novel learning method, termed deep angular A* (DAA*), by incorporating the proposed path angular freedom (PAF) into A*…

Computer Vision and Pattern Recognition · Computer Science 2025-07-25 Zhiwei Xu

The localization of multiple signal sources using sensor arrays has been a long-standing research challenge. While numerous solutions have been developed, signal space methods like MUSIC and ESPRIT have gained widespread popularity. As…

Signal Processing · Electrical Eng. & Systems 2025-01-22 Mehdi Haghshenas , Aamir Mahmood , Mikael Gidlund

In this paper, the partial relaxation approach is introduced and applied to DOA estimation using spectral search. Unlike existing methods like Capon or MUSIC which can be considered as single source approximations of multi-source estimation…

Signal Processing · Electrical Eng. & Systems 2024-10-30 Minh Trinh-Hoang , Mats Viberg , Marius Pesavento

In this paper, we address the problem of direction of arrival (DOA) estimation for multiple targets in the presence of sensor failures in a sparse array. Generally, sparse arrays are known with very high-resolution capabilities, where N…

Machine Learning · Computer Science 2023-06-22 Aya Mostafa Ahmed , Udaya S. K. P. Miriya Thanthrige , Aydin Sezgin , Fulvio Gini

In this letter, we propose a joint frequency-space sparse reconstruction method for direction-of-arrival (DOA) estimation, which effectively addresses the issues arising from the existence of coherent sources and array amplitude-phase…

Signal Processing · Electrical Eng. & Systems 2025-09-05 Yutong Chen , Cong Zhou , Changsheng You , Shuo Shi

Direction of arrival (DoA) estimation of multiple signals is pivotal in sensor array signal processing. A popular multi-signal DoA estimation method is the multiple signal classification (MUSIC) algorithm, which enables high-performance…

Signal Processing · Electrical Eng. & Systems 2025-12-03 Julian P. Merkofer , Guy Revach , Nir Shlezinger , Tirza Routtenberg , Ruud J. G. van Sloun

Acoustic mapping techniques have long been used in spatial audio processing for direction of arrival estimation (DoAE). Traditional beamforming methods for acoustic mapping, while interpretable, often rely on iterative solvers that can be…

Sound · Computer Science 2025-07-10 Adrian S. Roman , Iran R. Roman , Juan P. Bello

In multi-speaker environments the direction of arrival (DOA) of a target speaker is key for improving speech clarity and extracting target speaker's voice. However, traditional DOA estimation methods often struggle in the presence of noise,…

Sound · Computer Science 2024-12-30 Zixuan Li , Shulin He , Xueliang Zhang

This paper presents a series of user parameter-free iterative Sparse Asymptotic Minimum Variance (SAMV) approaches for array processing applications based on the asymptotically minimum variance (AMV) criterion. With the assumption of…

Signal Processing · Electrical Eng. & Systems 2018-02-12 Habti Abeida , Qilin Zhang , Jian Li , Nadjim Merabtine

Efficient real-time disparity estimation is critical for the application of stereo vision systems in various areas. Recently, stereo network based on coarse-to-fine method has largely relieved the memory constraints and speed limitations of…

Computer Vision and Pattern Recognition · Computer Science 2020-11-19 He Dai , Xuchong Zhang , Yongli Zhao , Hongbin Sun

Direction of Arrival (DoA) estimation using Sparse Linear Arrays (SLAs) has recently gained considerable attention in array processing thanks to their capability to provide enhanced degrees of freedom in resolving uncorrelated source…

Signal Processing · Electrical Eng. & Systems 2021-12-01 Saeid Sedighi , M. R. Bhavani Shankar , Mojtaba Soltanalian , Björn Ottersten

This paper presents a novel approach to automated stripboard circuit layout design using Answer Set Programming (ASP). The work formulates the layout problem as both a synthesis and multi-objective optimization task that simultaneously…

Hardware Architecture · Computer Science 2025-12-05 Fang Li

The use of planar and concentric circular microphone arrays in beamforming has gained attention due to their ability to optimize both azimuth and elevation angles, making them ideal for spatial audio tasks like sound source localization and…

Sound · Computer Science 2025-11-25 Jorge Ortigoso-Narro , Jose A. Belloch , Maximo Morales-Cespedes , Maximo Cobos

In this paper, we present a new scenario of direction of arrival (DOA) estimation using massive multiple-input multiple-output (MIMO) receive array with low-resolution analog-to-digital convertors (ADCs), which can strike a good balance…

Information Theory · Computer Science 2022-02-17 Baihua Shi , Nuo Chen , Xicheng Zhu , Yuwen Qian , Yijin Zhang , Feng Shu , Jiangzhou Wang

This paper considers near-field multiuser communications based on sparse arrays (SAs). First, for the uniform SAs (USAs), we analyze the beam gains of channel steering vectors, which shows that increasing the antenna spacings can…

Information Theory · Computer Science 2024-06-14 Kangjian Chen , Chenhao Qi , Geoffrey Ye Li , Octavia A. Dobre

In this paper, we address the problem of direction finding using coprime array, which is one of the most preferred sparse array configurations. Motivated by the fact that non-uniform element spacing hinders full utilization of the…

Signal Processing · Electrical Eng. & Systems 2022-07-12 Shengheng Liu , Zihuan Mao , Yimin D. Zhang , Yongming Huang