Editing Signal modulation (section)

==Miscellaneous modulation techniques==
* The use of [[on-off keying]] to transmit [[Morse code]] at [[radio frequencies]] is known as [[continuous wave]] (CW) operation.
* [[Adaptive modulation]]
* [[Space modulation]] is a method whereby signals are modulated within airspace such as that used in [[instrument landing system]]s.
* The [[microwave auditory effect]] has been pulse modulated with audio waveforms to evoke understandable spoken numbers.<ref>{{cite book |last= Lin|first= James C.|author-link= |date= August 20, 2021|title= Auditory Effects of Microwave Radiation|location= Chicago|publisher= Springer|page= 326|isbn= 978-3030645434}}</ref><ref>{{cite magazine |last= Justesen|first= Don|date= March 1, 1975|title= Microwaves and Behavior|url= http://www.mitchelleffect.com/1973_voice_to_skull.pdf|magazine= American Psychologist|location= Washington, D.C.|publisher= American Psychological Association|archive-url= https://web.archive.org/web/20160910133313/http://www.mitchelleffect.com/1973_voice_to_skull.pdf|access-date= October 5, 2021|archive-date= 2016-09-10}}</ref><ref>{{cite magazine |last= Justesen|first= Don|date= March 1, 1975|title= Microwaves and Behavior|url= https://pubmed.ncbi.nlm.nih.gov/1137231/|magazine= American Psychologist|volume= 30|issue= 3|pages= 391–401|location= Washington, D.C.|publisher= American Psychological Association|doi= 10.1037/0003-066x.30.3.391|pmid= 1137231|access-date= October 15, 2021}}</ref>