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Generation of band‐pass constant‐envelope signals with a pre‐assigned spectrum: a synthesis procedure
Author(s) -
Callegari S.
Publication year - 2002
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.184
Subject(s) - envelope (radar) , constant (computer programming) , modulation (music) , signal (programming language) , computer science , spectrum (functional analysis) , power (physics) , topology (electrical circuits) , mathematics , electronic engineering , telecommunications , physics , electrical engineering , engineering , acoustics , quantum mechanics , radar , programming language
The recent, increasing adoption of spread‐spectrum techniques, either in communications or in other fields, makes the design of band‐pass sources a topical subject. We consider the generation of constant‐envelope (i.e. constant power) band‐pass signals via a frequency modulation technique. In particular, we propose a general solution to the synthesis problem of delivering a constant envelope signal with a pre‐assigned band‐pass spectrum. Both quasi‐stationary and non‐stationary modulations are discussed and a novel optimization algorithm is proposed for the latter case. A design example concludes the presentation. Copyright © 2002 John Wiley & Sons, Ltd.