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A Search-Free DOA Estimation Algorithm for Coprime Arrays [PDF]

Digital Signal Processing, 2014
Recently, coprime arrays have been in the focus of research because of their potential in exploiting redundancy in spanning large apertures with fewer elements than suggested by theory. A coprime array consists of two uniform linear subarrays with inter-element spacings $Mλ/2$ and $Nλ/2$, where $M$ and $N$ are coprime integers and $λ$ is the wavelength
Petar M Djurić
exaly   +5 more sources

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Generalized Thinned Coprime Array for DOA Estimation

ICASSP 2021 - 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2021
Owing to the large degrees of freedom and reduced mutual coupling by producing difference coarrays, nonuniform linear arrays have aroused great interest in direction of arrival (DOA) estimation. Previous works have presented some new sparse arrays, such as the thinned coprime array.
Junpeng Shi, Yongxiang Liu, Fangqing Wen, Zhen Liu 0004, Panhe Hu, Zhenghui Gong   +5 more
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Analysis of Coprime Arrays on Moving Platform

ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2019
Moving platforms enable sparse arrays to assume higher degrees of freedom and lead to increased number of lags. In essence, array motion can fill the holes in the spatial auto-correlation lags associated with a fixed platform and, therefore, increase the number of sources detectable by the same physical array. In this paper, we consider coprime arrays,
Guodong Qin, Moeness G. Amin, Yimin D. Zhang   +2 more
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Multiplicity of coprime pairs for extension of coprime sensor arrays

The Journal of the Acoustical Society of America, 2019
This research finds the optimum period of a basic coprime sensor array (CSA) needed to reduce the PSL height to -13 dB for both minimum and product processing methods. Our design does not have the constraint that the subarray lengths be one integer apart unlike in [Adhikari et al., 2014].
Pablo Johnson, Daniel Sartori, Tyler Trosclair, John Willis, Kaushallya Adhikari   +4 more
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Sparse sensing with coprime arrays

2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers, 2010
Coprime sampling has, in the past, been used for signal processing applications such as range and doppler improvement in radar, and for identifying sinusoids in noise. This paper considers a coprime pair of samplers in space or time from the point of view of the difference coarray, which is key to the increased freedom available for processing with ...
P. P. Vaidyanathan, Piya Pal
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Gaussian signal detection by coprime sensor arrays

2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2015
Coprime sensor arrays (CSAs) achieve the resolution of a fully populated uniform linear array (ULA) with the same aperture using fewer sensors. The conventional CSA product beamformer suffers from a smaller array gain due to the reduced number of sensors.
Kaushallya Adhikari, John R. Buck
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Left-Right ambiguity resolution for coprime sparse arrays

The Journal of the Acoustical Society of America, 2022
Coprime Sparse Arrays (CSA) with two collocated uniform linear arrays are used to estimate O(MN) direction of arrivals for a narrow band source with only O(M+N) sensors. The CSA cannot discriminate the azimuth and its complementary angles due to the symmetry along the array-axis.
Baiju M, Nair, Rubin Jose, Peter, Arun, Kumar, Rajendar, Bahl   +3 more
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Coprime Array Design With Minimum Lag Redundancy

ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2019
In this paper, we propose a new sparse coprime array design that achieves a higher number of degrees-of-freedom for direction-of-arrival (DOA) estimation. The proposed array design completely avoids lag redundancies between the two constituting subarrays of the coprime array, thus achieving the maximum number of unique correlation lags under the ...
Yimin D. Zhang, Ammar Ahmed, Jian-Kang Zhang   +2 more
exaly   +3 more sources

Sampling with semi-coprime arrays

The Journal of the Acoustical Society of America, 2018
This research introduces a new array geometry called Semi-Coprime Array (SCA) that has the potential to significantly increase the degrees of freedom of a Uniform Linear Array (ULA). An SCA interleaves three ULAs (Subarray 1, Subarray 2, and Subarray 3). Each SCA has two underlying coprime integers (M and N).
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Coprime arrays in the context of compressive sensing

The Journal of the Acoustical Society of America, 2013
Arising naturally from the formalism of coarrays, coprime arrays offer a means of achieving sparsity along an array while maintaining certain measures of performance. This configuration offers benefits over traditional configurations for large aperture towed arrays in the ocean environment, but shallow water propagation complicates the wide sense ...
Andrew T. Pyzdek, R. Lee Culver
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