A Coarse-Grained Array Accelerator for Software-Defined Radio Baseband Processing

IEEE Micro ◽  
2008 ◽  
Vol 28 (4) ◽  
pp. 41-50 ◽  
Author(s):  
Bruno Bougard ◽  
Bjorn De Sutter ◽  
Diederik Verkest ◽  
Liesbet Van der Perre ◽  
Rudy Lauwereins
Keyword(s):  
Software Defined Radio ◽  
Coarse Grained ◽  
Baseband Processing

A Coarse-Grained Array based Baseband Processor for 100Mbps+ Software Defined Radio

2008 ◽  
Author(s):  
Bruno Bougard ◽  
Bjorn De Sutter ◽  
Sebastien Rabou ◽  
David Novo ◽  
Osman Allam ◽  
...  
Keyword(s):  
Software Defined Radio ◽  
Coarse Grained ◽  
Baseband Processor

scholarly journals A coarse-grained array based baseband processor for 100Mbps+ software defined radio

2008 ◽  
Author(s):  
Bruno Bougard ◽  
Bjorn De Sutter ◽  
Sebastien Rabou ◽  
David Novo ◽  
Osman Allam ◽  
...  
Keyword(s):  
Software Defined Radio ◽  
Coarse Grained ◽  
Baseband Processor

scholarly journals Software-Defined Radio Beamforming System for 5G/Radar Applications

2020 ◽  
Vol 10 (20) ◽  
pp. 7187
Author(s):  
Diogo Marinho ◽  
Raul Arruela ◽  
Tiago Varum ◽  
João N. Matos
Keyword(s):  
Radio Frequency ◽  
Millimeter Wave ◽  
Software Defined Radio ◽  
Anechoic Chamber ◽  
System Structure ◽  
Host Computer ◽  
Experimental Measurements ◽  
Radar Applications ◽  
Baseband Processing ◽  
5G Systems

Based on the flexibility of software-defined radio (SDR) techniques applied to an array of antennas, this article presents a beamforming architecture designed to operate in millimeter-wave bands (28 GHz), with possible applications in radar and 5G systems. The system structure, including its main constituents such as the radio frequency (RF) frontend modules, the radiating elements as well as the baseband processing on the host computer are widely described. Beamforming is achieved by digitally controlling the signals that feed the antennas. The experimental measurements performed in an anechoic chamber validate the proposed approach.

scholarly journals Cordic based algorithms for software defined radio (SDR) baseband processing

2006 ◽  
Vol 4 ◽  
pp. 179-184 ◽  
Author(s):  
B. Heyne ◽  
J. Götze
Keyword(s):  
Least Squares ◽  
Software Defined Radio ◽  
Communication Systems ◽  
Linear Least Squares ◽  
Multiuser Detector ◽  
Baseband Processing ◽  
Digital Baseband

Abstract. This paper presents two Cordic based algorithms which may be used for digital baseband processing in OFDM and/or CDMA based communication systems. The first one is a linear least squares based multiuser detector for CDMA incorporating descrambling and despreading. The second algorithm is a pure Cordic based FFT implementation. Both algorithms can be implemented using solely Cordic based architectures (e.g. coprocessors or ASIPs). The algorithms exactly fit the needs of a multistandard terminal as they both are freely parameterizable. This regards to the accuracy of the results as well as to the parameters of the performed function (e.g. size of the FFT).

The Alteration of the Pore Spaces in Sandstones

1973 ◽  
Vol 31 ◽  
pp. 210-211
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Other ◽  
Coarse Grained ◽  
Depositional Fabric ◽  
Soluble Components ◽  
Scanning Electron ◽  
Shape And Size

The pore spaces in sandstones are the result of the original depositional fabric and the degree of post-depositional alteration that the rock has experienced. The largest pore volumes are present in coarse-grained, well-sorted materials with high sphericity. The chief mechanisms which alter the shape and size of the pores are precipitation of cementing agents and the dissolution of soluble components. Each process may operate alone or in combination with the other, or there may be several generations of cementation and solution.The scanning electron microscope has ‘been used in this study to reveal the morphology of the pore spaces in a variety of moderate porosity, orthoquartzites.

On the Origin of the Microscystalline Structure in Rapidly Solidified IN-100 Powder

1977 ◽  
Vol 35 ◽  
pp. 260-261
Author(s):  
J. M. Walsh ◽  
K. P. Gumz ◽  
J. C. Whittles ◽  
B. H. Kear
Keyword(s):  
The Other ◽  
Coarse Grained ◽  
Microcrystalline Structure ◽  
Routine Examination ◽  
Atomization Process ◽  
Centrifugal Atomization ◽  
Splat Quenching ◽  
Powder Particles ◽  
Dendritic Microstructures ◽  
Rapidly Solidified

During a routine examination of the microstructure of rapidly solidified IN-100 powder, produced by a newly-developed centrifugal atomization process1, essentially two distinct types of microstructure were identified. When a high melt superheat is maintained during atomization, the powder particles are predominantly coarse-grained, equiaxed or columnar, with distinctly dendritic microstructures, Figs, la and 4a. On the other hand, when the melt superheat is reduced by increasing the heat flow to the disc of the rotary atomizer, the powder particles are predominantly microcrystalline in character, with typically one dendrite per grain, Figs, lb and 4b. In what follows, evidence is presented that strongly supports the view that the unusual microcrystalline structure has its origin in dendrite erosion occurring in a 'mushy zone' of dynamic solidification on the disc of the rotary atomizer.The critical observations were made on atomized material that had undergone 'splat-quenching' on previously solidified, chilled substrate particles.

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