نتایج جستجو برای: uniform linear array ula

تعداد نتایج: 705876  

Journal: :journal of nanostructures 2014
s. samanifar m. almasikashi a. ramazani

fe49co33ni18 nanowire arrays (175 nm in diameter and lengths ranging from 5 to 32μm) were fabricated into nanopores of hard-anodized aluminum oxide templates using pulsed ac electrodeposition technique. hysteresis loop measurements indicated that increasing the length decreases coercivity and squareness values (from 274 oe and 0.58 to200 oe and 0.105, respectively), indicating the increase in m...

Journal: :J. Inf. Sci. Eng. 1998
Jenn-Yang Ke Jong-Chuang Tsay

The mapping of an n-dimensional uniform dependence algorithm onto a linear processor array can be considered as a linear transformation problem. However, to find a linear space-optimal transformation is difficult because the conditions for checking a correct mapping and the space cost function do not have closed-form expressions, especially when the index set J of an n-dimensional algorithm is ...

2005
Thomas Baumgartner Thomas Neubauer Ernst Bonek

We present a simple beam switching scheme to increase the downlink capacity of the UMTS FDD-mode. At the base station this method only needs an additional transceiver chain, i.e. a separate one for each beam, a beamforming network and a uniform linear array. The mobiles need no changes at all. We analyze the performance of our method by means of system level simulations. We found an increase in...

Journal: :American journal of physiology. Endocrinology and metabolism 2005
W C Engeland W B Ennen A Elayaperumal D A Durand B K Levay-Young

Compensatory adrenal growth after unilateral adrenalectomy (ULA) leads to adrenocortical hyperplasia. Because zonal growth contributions are not clear, we characterized the phenotype of cortical cells that proliferate using immunofluorescence histochemistry and zone-specific cell counting. Rats underwent ULA, sham adrenalectomy (sham), or no surgery and were killed at 2 or 5 days. Adrenals were...

Journal: :IEEE Transactions on Wireless Communications 2022

Reconfigurable intelligent surface (RIS) has been recognized as a potential technology for 5G beyond and attracted tremendous research attention. However, channel estimation RIS-aided systems is still critical challenge due to the excessive amount of parameters in cascaded channel. The existing compressive sensing (CS)-based RIS schemes only adopt incomplete sparsity, which induces redundant pi...

2004
Tharaka A. Lamahewa Marvin K. Simon Thushara D. Abhayapala Rodney A. Kennedy

In this paper, we derive an analytical expression for the exact pairwise error probability (PEP) of a space-time coded system operating over a spatially correlated slow fading channel using a moment-generating function-based approach. This analytical PEP expression is more realistic than previously published exact-PEP expressions as it fully accounts for antenna spacing, antenna geometries (Uni...

2005
Tharaka A. Lamahewa Marvin K. Simon Thushara D. Abhayapala Rodney A. Kennedy

In this paper, we derive an analytical expression for the exact pairwise error probability (PEP) of a space-time coded system operating over a spatially correlated slow fading channel using a moment-generating function-based approach. This analytical PEP expression is more realistic than previously published exact-PEP expressions as it fully accounts for antenna spacing, antenna geometries (uni...

2010
P. Yang F. Yang Z. P. Nie

A novel DOA finding method for conformal array applications is proposed. By using sub-array divided and interpolation technique, ESPRIT-based algorithms can be used on conformal arrays for 1-D and 2-D DOA estimation. In this paper, the circular array mounted on a metallic cylindrical platform is divided to several subarrays, and each sub-array is transformed to virtual uniform linear array or v...

Journal: :Journal of Marine Science and Engineering 2023

In sonar systems, the performance of adaptive beamformers severely degrades when mismatches occur between actual and presumed steering vectors desired signal, mainly due to hydrophone position errors, amplitude-phase scattered effect arrays. Similarly, an inadequate number “training” samples can lead degradations similar those caused by mismatches. this paper, beamforming algorithm based on obl...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید