Results 151 to 160 of about 270,830 (185)

Direct-MUSIC on sparse arrays

2012 International Conference on Signal Processing and Communications (SPCOM), 2012
Nested and coprime arrays are sparse arrays which can identify O(m2) sources using only m sensors. Systematic algorithms have recently been developed for such identification. These algorithms are traditionally implemented by performing MUSIC or a similar algorithm in the difference-coarray domain.
Vaidyanathan, P. P., Pal, Piya
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Sparse and irregular sampling in array processing

2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100), 2002
Rule-based thinning and element placement methods are first discussed. This includes random arrays, binned random arrays, periodic thinning, element shadowing properties, and fractal arrays. The algorithmic optimization of layouts of 1-D and 2-D sparse arrays is presented and it is empirically derived that the peak sidelobe level for an array with K ...
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Sparse Cylindrical Sonar Arrays

IEEE Journal of Oceanic Engineering, 2008
Sparse arrays offer a means for reducing the cost and complexity of beamforming systems. Most of the work in the literature has focused on sparse linear arrays with isotropic transducer elements, which simplifies analysis greatly. In this paper, we will focus on multibeam cylindrical arrays using highly directive elements for use in fishery ...
J.E. Kirkebo, A. Austeng
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Sparse Matrix Computations on Parallel Processor Arrays

SIAM Journal on Scientific Computing, 1993
This paper deals with the balancing of distributed compressed storage of large sparse matrices on a massively parallel computer. The authors say that an assignment of matrix elements to the processor array preserves the integrity of the matrix if for every row(column) all its nonzero elements are placed into processors lying in a single row(column) of ...
Andrew T. Ogielski, William Aiello
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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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A Robust Sparse Fractal Array

2023 IEEE 13th Annual Computing and Communication Workshop and Conference (CCWC), 2023
Kretika Goel, Monika Aggarwal, Subrat Kar   +2 more
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APPLICATION OF ARRAY PROCESSOR TO SPARSE ELIMINATION

Proceedings of SPE Reservoir Simulation Symposium, 1979
Abstract The Floating Point Systems array processor AP120B can be used to efficiently solve large systems of linear equations by a sparse Gaussian elimination technique. Bench mark tests show the following results: For LU factorization, the AP120B requires 22 to 35% less CPU time than the IBM 370/168; for forward or
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Sparse Array Signal Processing

2023
This dissertation details three approaches for direction-of-arrival (DOA) estimation or beamforming in array signal processing from the perspective of sparsity. In the first part of this dissertation, we consider sparse array beamformer design based on the alternating direction method of multipliers (ADMM); in the second part of this dissertation, the ...
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Beamforming of Sparse Cylindrical Arrays

2017
As sparse arrays cost fewer elements, they are less expensive than dense arrays and could be applied widely in antenna and sonar deployment, two sparse cylindrical arrays are proposed in this paper. According to the characteristic of cylindrical array, it can be seen as a linear array whose elements are the identical circular arrays.
Na Wu, Qilian Liang
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Accessing Sparse Arrays in Parallel Memories

1983
The concept of dense and sparse execution of arrays is introduced. Arrays, themselves, can be stored in a dense or sparse manner in a parallel memory with m memory modules. Hardware is proposed for speeding up the execution of array operations of the form C(c//0 plus cI) implied by A(a//0 plus al) OP B(b//0 plus bI), where a//0, a, b//0, b, c//0, c are
Banerjee, U., Gajski, D., Kuck, D.
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