Editing Linear-feedback shift register (section)

==== Other uses ====
LFSRs are also used in [[radio jamming]] systems to generate pseudo-random noise to raise the noise floor of a target communication system.

The German time signal [[DCF77]], in addition to amplitude keying, employs [[phase-shift keying]] driven by a 9-stage LFSR to increase the accuracy of received time and the robustness of the data stream in the presence of noise.<ref name="phasemod">{{cite conference |url=https://www.ptb.de/cms/fileadmin/internet/fachabteilungen/abteilung_4/4.4_zeit_und_frequenz/pdf/5_1988_Hetzel_-_Proc_EFTF_88.pdf |title=Time dissemination via the LF transmitter DCF77 using a pseudo-random phase-shift keying of the carrier |first=P. |last=Hetzel |date=16 March 1988 |conference=2nd European Frequency and Time Forum |location=Neuchâtel |pages=351–364 |access-date=11 October 2011}}</ref>