Generation of band-pass constant-envelope signals with a pre-assigned spectrum: a synthesis procedure

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 (C) 2002 John Wiley Sons, Ltd.