A constrained LMS algorithm for interference rejection

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


A constrained least-mean-square (LMS) technique that utilizes a modified optimality criterion which enhances the detection capabilities of direct-sequence spread-spectrum systems is presented. Two transversal tapped delay lines (TDLs) are operated simultaneously, one containing the received data and the other containing the constraint data. One set of adaptive weights operates on both TDLs with the LMS algorithm as the update technique. The filter weights are updated with respect to both minimizing the mean-square output error and minimizing the constraint error. Two types of constraint conditions are considered. The first is a correlation-matching condition and the second is a minimum-filter-energy condition. Simulation results presented demonstrate the output mean-square error improvement obtained by using the constrained rejection filter.

Original languageEnglish (US)
Title of host publicationMilitary Communications Conference, MILCOM 1992
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Electronic)078030585X
StatePublished - 1992
Event1992 Military Communications Conference, MILCOM 1992 - San Diego, United States
Duration: Oct 11 1992Oct 14 1992

Publication series

NameProceedings - IEEE Military Communications Conference MILCOM


Conference1992 Military Communications Conference, MILCOM 1992
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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