par Molineaux, Guylian 
;Horlin, François ;De Doncker, Philippe ;Sarrazin, Julien S. J.
Référence (04-08 December, 2022: Rio de Janeiro, Brazil), Proc. of the IEEE Global Communications Conference (GLOBECOM)
Publication Publié, 2022-12
;Horlin, François ;De Doncker, Philippe ;Sarrazin, Julien S. J.Référence (04-08 December, 2022: Rio de Janeiro, Brazil), Proc. of the IEEE Global Communications Conference (GLOBECOM)
Publication Publié, 2022-12
Publication dans des actes
| Résumé : | A unified frequency diverse array (FDA) and spatialdata focusing (SDF) system, or FDA-SDF, is proposed as a novelapproach to perform spatially confined broadcasting of information, i.e. geocasting. It is shown that SDF processing exploitsFDA range-angle-dependency more effectively than conventionalpower focusing implementations, resulting in improved spatialfocusing precision and reduced array size. Additionally, thetime-variance flaw in conventional FDAs is addressed and mitigated by introducing a generalized baseband FDA model. Thispaper describes the FDA-SDF system model in free space, including dedicated SDF precoding, beamsteering, and equalization,exploiting FDA multi-frequency transmission for 2-dimensionalrange-angle-based time-invariant geocasting. Simulations of theFDA-SDF system illustrate compatibility with conventional FDAfrequency offset schemes and highlight degrees of freedom forgeocast delivery zone manipulation. Finally, FDA-SDF’s superiorspatial precision is demonstrated: a 3-antenna FDA-SDF setupmatches the radial and angular precision of a conventional FDAusing, respectively, 13 and 23 antennas. |
