Results 11 to 20 of about 441 (195)
, 2022 Costas arrays are constructed similarly to the n-queens problem, an n-by-n grid has one point in every column. Any displacement vector from any two points on the Costas array must be unique. This property allows any two points to be identifiable, resulting in an auto-ambiguity function useful in RADAR and SONAR.
Emils Matiss (12029837)
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Combinatorial designs with Costas arrays properties
Discrete Mathematics, 1991 Several constructions of binary arrays of dimension 3 with 2-dimensional subarrays with good autocorrelation properties are given.
Etzion, Tuvi
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Contributions to the theory of Costas arrays [PDF]
, 2023 This thesis aims to study Costas arrays from different points of view. A Costas array of size n is an n × n binary matrix such that no two of the (n/2) line segments connecting 1s have the same length and slope. Costas arrays are attractive, highly combinatorial objects with applications in radar engineering and signal processing that motivates us to ...
Ardalani, Ali
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Universal Costas Matrices: Towards a General Framework for Costas Array Construction [PDF]
CoRRCostas arrays are a special type of permutation matrices with ideal autocorrelation and low cross-correlation properties, making them valuable for radar, wireless communication, and integrated sensing and communication applications. This paper presents a novel unified framework for analyzing and discovering new Costas arrays.
Fatih Gulec, Vahid Abolghasemi
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A New Search Method for Costas Arrays by Using Difference Triangle Analysis
, 2017 Costas arrays are used for constructing frequency sets for the frequency shift keying waveforms in low probability of intercept radars. Costas arrays are constructed mostly using the methods based on the finite field theory or they are found by ...
Afacan, Erkan
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Primitive elements in finite fields and costas arrays [PDF]
Applicable Algebra in Engineering, Communication and Computing, 1991 This paper is concerned with the following four conjectures about the finite field \(\mathbb F_q\) which were made by \textit{S. W. Golomb} in 1984 [J. Comb. Theory, Ser. A 37, 13--21 (1984; Zbl 0547.05020)]. Conjecture A: If \(q>2\), then \(\mathbb F_q\) contains primitive elements \(\alpha\) and \(\beta\) with \(\alpha+\beta=1\). Conjecture B: If \(q>
Stephen D. Cohen, Gary L. Mullen
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SensorsThis paper proposes a two-dimensional orthogonal pattern division multiple access (OPDMA) technique to address key challenges in massive MIMO systems, including complex channel estimation, multipath interference, Doppler effects, and inter-antenna ...
Ruimai Wang +4 more
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Algebraic constructions for costas arrays
Journal of Combinatorial Theory, Series A, 1984 The following is equivalent to a problem posed by \textit{J. P. Costas} [Medium constraints on sonar design and performance. EASCON Convention Record, 68A-68L (1975)], who encountered it in the context of attempting to construct sonar signal patterns. Problem.
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Truly Subquadratic-Time Extension Queries and Periodicity Detection in Strings with Uncertainties [PDF]
, 2016 Strings with don't care symbols, also called partial words, and more general indeterminate strings are a natural representation of strings containing uncertain symbols.
Radoszewski, Jakub +1 more
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Non-redundant optical phased array
, 2021 Optical phased array (OPA) is a promising beam-steering device for various applications such as light detection and ranging (LiDAR), optical projection, free-space optical communication and switching.
Ryota Tanomura (10959694) +6 more
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