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On the Size and Redundancy of the Fourth-Order Difference Co-Array
IEEE Signal Processing Letters, 2021In array processing, the fourth-order difference co-array of sparse arrays with $N$ sensors admits to resolve $\mathcal {O}(N^4)$ source directions with proper assumptions. This $\mathcal {O}(N^4)$ property is relevant to the size of the central uniform linear array (ULA) segment of the fourth-order difference co-array.
Yuan-Pon Chen, Chun-Lin Liu
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The Generalized Compressed Nested Array for the Construction of Fourth-order Difference Co-array
Circuits, Systems, and Signal Processing, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Bo Dang 0001, Yan Zhou 0015
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Extended Cantor Arrays with Hole-Free Fourth-Order Difference Co-Arrays
2021 IEEE International Symposium on Circuits and Systems (ISCAS), 2021We present extended Cantor arrays based on fourth- order difference co-arrays (E-FO-Cantor). These arrays result from extending the recently proposed fractal arrays to fourth- order difference co-arrays, and lead to fourth-order difference co-arrays that are hole-free.
Zixiang Yang +4 more
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Generalized design method for the difference co-array of the sum co-array
2016 IEEE International Conference on Digital Signal Processing (DSP), 2016Active direction of arrival estimation system can significantly improve the degrees of freedom (DOFs), since the vectorized covariance matrix of the data measurements from transmit and receive arrays can be considered as observations from a augmented virtual array, whose elements are given by the difference co-array of the sum co-array (DCSC).
Jianyan Liu +3 more
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Co-prime array processing with sum and difference co-array
2015 49th Asilomar Conference on Signals, Systems and Computers, 2015Among various sparse-array techniques, co-prime array is found to be more attractive because of its high efficiency and simplicity. In this paper, we propose a scheme that can exploit both sum and difference co-arrays to form a larger size of continuous virtual array while keeping the conventional co-prime array configuration.
Xiaomeng Wang +2 more
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Linear Array Thinning Exploiting Almost Difference Sets [PDF]
IEEE Transactions on Antennas and Propagation, 2009 This paper describes a class of linear thinned arrays with predictable and well-behaved sidelobes. The element placement is based on almost difference sets and the array power pattern is forced to pass through N uniformly-spaced values that, although ...
Giacomo Oliveri +2 more
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Fourth-Order Sparse Array Design From a Sum-Difference Co-Array Perspective
IEEE Transactions on Signal ProcessingHaodong Guo, Qing Shen, Hing Cheung So
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Extended beamforming by sum and difference composite co-array for radio surveillance
2017 IEEE Workshop on Information Forensics and Security (WIFS), 2017This paper presents a way of extended digital beamforming technique by non-uniform array antenna used for radio surveillance. We try to enhance the array degree of freedom (DOF) by combining the concepts of extended (sum and difference) co-arrays, so that we can create a better beampattern with narrower mainbeam and more number of nulls. Performance of
Sho Iwazaki, Koichi Ichige
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DOA estimation based on multi-resolution difference co-array perspective
Digital Signal Processing, 2017Abstract This paper presents two kinds of K-level co-prime linear array geometries and the corresponding direction of arrival estimation algorithm based on the multi-resolution difference co-array (MRDCA) perspective. The MRDCA can simultaneously improve the degree of freedom and the angle-resolution by utilizing a class of virtual sparse uniform ...
Jianyan Liu +3 more
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Underdetermined Direction of Arrival Estimation by Sum and Difference Composite Co-Array
2018 25th IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2018This paper studies underdetermined direction of arrival (DOA) estimation accuracy by sum and difference composite co-array. We have studied to further enhance the DOF by combining the concepts of the sum co-array and the difference co-array, which is called “sum and difference composite coarray”, and evaluated its beamforming performance.
Sho Iwazaki, Koichi Ichige
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