phase cycling 

https://doi.org/10.1351/goldbook.08392
Component of nuclear magnetic resonance spectroscopy experiment that repeats a pulse sequence changing only the phases of the pulse(s) and the phase-sensitive detector reference.
Note:
The resultant FID’s are then added to suppress undesirable signal components and/or to produce the desired effect of a pulse sequence (e.g., multiple quantum filter).
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 700 [Terms] [Paper]