> I've always asked myself why spacecrafts "wasted" energy with carriers and nev...

		chokeartist on Feb 19, 2021 \| parent \| context \| favorite \| on: Radio Amateur Copies Signal from Mars-Orbiting Sat... > I've always asked myself why spacecrafts "wasted" energy with carriers and never realized they make the signal easer to find. Not exactly. You need a carrier wave / signal to modulate information onto. Can't modulate info onto nothing.

Yes, you can. There are a number of supressed-carrier modes, e.g. single side band.