Results 71 to 80 of about 4,315,310 (343)

Baseband Transceiver Design of a High Definition Radio FM System Using Joint Theoretical Analysis and FPGA Implementation

International Journal of Antennas and Propagation, 2014
Advances in wireless communications have enabled various technologies for wireless digital communication. In the field of digital radio broadcasting, several specifications have been proposed, such as Eureka-147 and digital radio mondiale (DRM).
Chien-Sheng Chen, Chyuan-Der Lu, Ho-Nien Shou, Le-Wei Lin   +3 more
doaj   +1 more source

Anti-multipath digital signal detector [PDF]

, 1974
Detector operates in conjunction with radio frequency portion of receiver to detect digital signals transmitted in known modulation formats. Signal is constructed by assigning known and distinct modulation waveforms to sequence of message symbols.
Painter, J. H.
core   +1 more source

Microscale 3D Printed Pillars and Porous Polymeric Structures: Manufacturability and Micromechanics

Advanced Engineering Materials, EarlyView.
This work demonstrates how two‐photon polymerization enables the fabrication of microscale solid and porous structures from IP‐Q, IP‐S, and IP‐PDMS resins. Combining morphological and mechanical characterization, the study provides the first systematic insights into IP‐Q mechanics and reveals how processing parameters affect structure and stiffness ...
Aikaterini Isaakidou, Mahya Ganjian, Vahid Moosabeiki, Marius Alexander Leeflang, Mahdiyeh Nouri Goushki, Pouyan Esmailzadeh Boukany, Maria Wątroba, Alexander Groetsch, Jakob Schwiedrzik, Mohammad Javad Mirzaali, Iulian Apachitei, Lidy Elena Fratila‐Apachitei, Amir Abbas Zadpoor   +12 more
wiley   +1 more source

The end(s) of analogue: access to CBC/Radio-Canada Television Programming in an era of digital delivery [PDF]

, 2021
Steven J. May
openalex   +1 more source

Antimultipath communication by injecting tone into null in signal spectrum [PDF]

, 1987
A transmitter for digital radio communication creates a null by balanced encoding of data modulated on an RF carrier, and inserts a calibration tone within the null. This is accomplished by having the calibration tone coincide in phase and frequency with
Davarian, Faramaz
core   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos, Eleni Papadopoulou, Grigorios Kostopoulos, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria Gkara, Chara C. Mitropoulou, Nikos D. Lagaros   +8 more
wiley   +1 more source

Influence of major mergers on the radio emission of elliptical galaxies

, 2012
We investigate the influence of major mergers on the radio emission of elliptical galaxies. We use a complete sample of close pairs, which contains 475 merging and 1828 non-merging paired elliptical galaxies of ...
Altschuler, Auriemma, Barton, Becker, Best, Best, Brown, Calvani, Condon, Condon, Feretti, Giuricin, González Delgado, Govoni, Heckman, Heckman, Heckman, Hummel, Hummel, J. L. Han, Keel, Kocevski, L. G. Hou, Lambas, McCarthy, Ramos Almeida, Robaina, Sanders, Schawinski, Schawinski, Stocke, Tadhunter, Tal, Wen, White, Wilkinson, Y. H. Wen, Z. L. Wen   +37 more
core   +1 more source

Magnetoactive Metamaterials: A State‐of‐the‐Art Review

Advanced Engineering Materials, EarlyView.
Magnetoactive metamaterials combine magnetoactive composites with architected metastructures to enable contactless, tunable control of mechanical, acoustic, and elastic properties. This review highlights recent advances in their design, fabrication, and applications in soft robotics, biomedical devices, and adaptive structures and outlines future ...
Seyyedmohammad Aghamiri, Ramin Sedaghati
wiley   +1 more source

LEO Satellite Beam Hopping for Power Consumption Minimization at Different Elevation Angles

IEEE Open Journal of the Communications Society
Low Earth orbit (LEO) satellite communication promises to bridge the digital divide. As satellite payload is limited, methods such as beam hopping techniques are necessary to ensure that the scarce resources are used efficiently. Current literature lacks
Agnes Fastenbauer, Younes El Hadfi, Megumi Kaneko, Philipp Svoboda, Markus Rupp   +4 more
doaj   +1 more source