1. A method of controlling ramping of a communications signal including amplitude modulation between two states including
a state of minimal output power of the communications signal during which no information is conveyed and a state in of greater
output power in which information is conveyed, the method comprising:
adding a predetermined sequence of symbols to a sequence of information symbols to be communicated to form an augmented sequence
of symbols; and
performing modulation of the augmented sequence of symbols to produce an envelope signal that exhibits a desired ramp profile,
wherein adding said predetermined sequence of symbols is performed in a manner that ensures a transient spectrum of the envelope
signal during ramping is no worse than the transient spectrum during information bearing modulation.
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