Adaptive noise cancelling is an unorthodox signal processing technique that is highly effective in suppressing additive interference or noise corrupting a received target signal at the main or primary sensor in certain common situations where the interference is known and is accessible but unavoidable and where the target signal and the interference are unrelated, that is, uncorrelatedWidrow, B. and Stearns S. D. (1985) "Adaptive Signal Processing," Pearson Education, Inc. ISBN 9780130040299, 0130040290 OCLC 11159524. Examples of such situations include:
