Title: Adaptive recursive least mean square error filter

Abstract: An adaptive recursive filter is disclosed which, in a preferred embodiment, comprises first and second adaptive transversal filters selectively coupled together to minimize the mean square error of the output data of the recursive filter based upon observations of input data to the recursive filter. Each transversal filter includes a tapped delay line with a variable weight on each tap. The output data of the recursive filter is developed by combining the outputs of the first and second transversal filters. The input data is applied to the first transversal filter, while the output data is applied to the second transversal filter. The output data is also combined with a reference signal to provide an error signal. A function of that error signal is utilized to update the weights of all of the taps in both transversal filters in order to cause the weights to automatically adapt themselves to minimize the mean square error of the output data of the recursive filter.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Feintuch, Paul L. (Covina, CA, US)

Application Number: 671889
Filing Date: 1976-03-29
Publication_date: 1977-07-26
Assignee: Rockwell International Corporation (El Segundo, CA)
Primary Class(es): 708/322 327/553, 333/18, 333/166, 600/509, 600/511, 702/190
Other Classes:
US Patent Ref:

3508172	Apr, 1970	Kretzmer et al.	333/18.
3646480	Feb, 1972	Spaulding	333/70.
3648171	Mar, 1972	Hirsch	333/18.
3715670	Feb, 1973	Hirsch et al.	333/18.
3755738	Aug, 1973	Gitlin et al.	325/42.
3974449	Aug, 1976	Falconer	333/18.

Other Refs:
Primary Examiner: Smith, Jerry
Assistant Examiner:
Attorney: Hamann; H. Fredrick, Pitts; Rolf M., Jameson; George