Results 31 to 40 of about 103,159 (268)
Electronics Letters, 2021 When there is the coexistence of uncorrelated and coherent signals in sparse arrays, the conventional algorithms using coarray are fail. In order to solve this problem, the letter proposes a novel method based on compressed sensing.
Peng Han +4 more
doaj +1 more source
Sparse Billboard and T-Shaped Arrays for Two-Dimensional Direction of Arrival Estimation
IEEE Open Journal of Signal Processing, 2023 In two-dimensional direction of arrival (2D-DOA) estimation, planar arrays can estimate the elevation and azimuth angles simultaneously. However, many planar array topologies such as billboard, L-shaped, T-shaped, and 2D nested arrays suffer from mutual ...
Saleh A. Alawsh +4 more
doaj +1 more source
Sparse Sensing with Semi-Coprime Arrays
, 2018 A semi-coprime array (SCA) interleaves two undersampled uniform linear arrays (ULAs) and a $Q$ element standard ULA. The undersampling factors of the first two arrays are $QM$ and $QN$ respectively where $M$ and $N$ are coprime. The resulting non-uniform
Adhikari, Kaushallya
core +1 more source
DOA Estimation in Partially Correlated Noise Using Low-Rank/Sparse Matrix Decomposition [PDF]
, 2014 We consider the problem of direction-of-arrival (DOA) estimation in unknown partially correlated noise environments where the noise covariance matrix is sparse. A sparse noise covariance matrix is a common model for a sparse array of sensors consisted of
Babaie-Zadeh, Massoud +4 more
core +1 more source
Evaluating Spatial Resolution and Channel Capacity of Sparse Cylindrical Arrays for Massive MIMO
IEEE Access, 2017 How to design antenna arrays plays an important role in wireless communications, especially when there are hundreds of antennas. In massive multiple-input and multiple-output (MIMO), if the number of antennas and RF chains are increasing, the channel ...
Na Wu, Fangqi Zhu, Qilian Liang
doaj +1 more source
New sparse array for non‐circular sources with increased degrees of freedom
Electronics Letters, 2021 Recently, sparse arrays have received considerable attention as they provide larger array aperture and increased degrees‐of‐freedom (DOFs) compared to uniform linear arrays.
Abdul Hayee Shaikh +3 more
doaj +1 more source
Sparse Active Rectangular Array with Few Closely Spaced Elements
, 2018 Sparse sensor arrays offer a cost effective alternative to uniform arrays. By utilizing the co-array, a sparse array can match the performance of a filled array, despite having significantly fewer sensors.
Koivunen, Visa, Rajamäki, Robin
core +1 more source
Direction of Arrival Estimation of Coherent Wideband Sources Using Nested Array
Sensors, 2023 Due to their ability to achieve higher DOA estimation accuracy and larger degrees of freedom (DOF) using a fixed number of antennas, sparse arrays, etc., nested and coprime arrays have attracted a lot of attention in relation to research into direction ...
Yawei Tang +3 more
doaj +1 more source
Sparse Array DFT Beamformers for Wideband Sources
, 2019 Sparse arrays are popular for performance optimization while keeping the hardware and computational costs down. In this paper, we consider sparse arrays design method for wideband source operating in a wideband jamming environment.
Amin, Moeness G., Hamza, Syed A.
core +1 more source
Deterministic sub-linear space LCE data structures with efficient construction [PDF]
, 2016 Given a string $S$ of $n$ symbols, a longest common extension query $\mathsf{LCE}(i,j)$ asks for the length of the longest common prefix of the $i$th and $j$th suffixes of $S$. LCE queries have several important applications in string processing, perhaps
Bannai, Hideo +5 more
core +2 more sources