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Transformation of the Spectrum of a Signal in Communication between Relativistically Moving Inertial Frames
- Source :
- IEEE Transactions on Aerospace and Electronic Systems. :82-93
- Publication Year :
- 1974
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 1974.
-
Abstract
- Future space exploration may involve communications between spacecraft moving at relativistic velocities. One of the significant problems associated with such communication is spectral distortion of signals which are propagated between relativistic frames. This distortion is generated by both changing propagation distances and purely relativistic electromagnetic field transformations. In this paper a linear integral transformation is formulated for relating the Fourier spectra of the source antenna excitation current and the resulting incident electric field at the receiving antenna. The kernel of the transformation is evaluated for the case of a steerable source antenna tracking on the advanced receiver position. The transformation is then applied to the case of an ideal thin-wire half-wave dipole source antenna excited by a narrowband, double-sideband modulated current. The specific distortions of spectral spreading and translation are then related to increased bandwidth and upper cutoff frequency requirements of receiving systems in relativistic applications.
- Subjects :
- Electromagnetic field
Physics
Inertial frame of reference
business.industry
Acoustics
Bandwidth (signal processing)
Aerospace Engineering
Integral transform
Cutoff frequency
law.invention
symbols.namesake
Optics
Narrowband
law
Fourier analysis
symbols
Dipole antenna
Electrical and Electronic Engineering
business
Computer Science::Information Theory
Subjects
Details
- ISSN :
- 00189251
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Aerospace and Electronic Systems
- Accession number :
- edsair.doi...........b3728a239e3af7319b6119f1f68255a6