An overview of direction-of-arrival estimation methods using adaptive directional time-frequency distributions

PK Eranti, BD Barkana - Electronics, 2022 - mdpi.com
Direction of arrival (DOA) is one of the essential topics in array signal processing that has
many applications in communications, smart antennas, seismology, acoustics, radars, and …

A passive DOA estimation algorithm of underwater multipath signals via spatial time-frequency distributions

X Han, M Liu, S Zhang, R Zheng… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Direction of arrival (DOA) estimation of underwater multipath signals has become an
indispensable part of many military and civil applications in the oceanic field. However …

Novel direction of arrival estimation using adaptive directional spatial time-frequency distribution

NA Khan, S Ali, M Mohammadi, J Akram - Signal Processing, 2020 - Elsevier
Novel spatial time-frequency distributions and instantaneous frequency estimation scheme
are developed for the proposed direction of arrival estimation scheme. A new class of spatial …

Sparsity-aware adaptive directional time–frequency distribution for source localization

N Ali Khan, S Ali - Circuits, Systems, and Signal Processing, 2018 - Springer
Multi-component characteristics and missing data samples introduce artifacts and cross-
terms in quadratic time–frequency distributions, thus affecting their readability. In this study …

Direction of arrival estimation of sources with intersecting signature in time–frequency domain using a combination of IF estimation and MUSIC algorithm

NA Khan, S Ali, M Mohammadi, M Haneef - Multidimensional Systems and …, 2020 - Springer
Time–frequency (TF) approaches are frequently employed for source localization at low
signal to noise ratio. However, TF approaches fail to achieve the desired performance for …

Performance comparison of time-frequency distributions for estimation of instantaneous frequency of heart rate variability signals

NA Khan, P Jönsson, M Sandsten - Applied Sciences, 2017 - mdpi.com
The instantaneous frequency (IF) of a non-stationary signal is usually estimated from a time-
frequency distribution (TFD). The IF of heart rate variability (HRV) is an important parameter …

Array signal processing and systems

B Liao, A Madanayake, P Agathoklis - Multidimensional Systems and …, 2018 - Springer
We are delighted to present this special issue of Multidimensional Systems and Signal
Processing on Array Signal Processing and Systems. Sensor arrays play an important role …

An efficient direction of arrival estimation algorithm for sources with intersecting signature in the time–frequency domain

NA Khan, S Ali, K Choi - Applied Sciences, 2021 - mdpi.com
An efficient direction of arrival estimation method is proposed. The proposed algorithm
accurately estimates the instantaneous frequency of signals received by multiple sensors …

Blind source separation schemes for mono-sensor and multi-sensor systems with application to signal detection

S Ali, NA Khan, M Haneef, X Luo - Circuits, Systems, and Signal …, 2017 - Springer
In this paper, blind source separation (BSS) techniques based on time–frequency (t–f)
distributions are proposed for multi-sensor and mono-sensor scenarios. The proposed …

DOA estimation of non-stationary and close-spaced sources based on unified parameterized model

J Zhang, T Li, Q He, Z Peng - IEEE Sensors Journal, 2023 - ieeexplore.ieee.org
Time–frequency (TF) analysis can improve the performance of direction-of-arrival (DOA)
estimation by only utilizing the valid TF points in the TF plane. However, when instantaneous …