A constrained LMS algorithm for interference rejection

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

2 Citations (Scopus)

Abstract

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.
Pages696-700
Number of pages5
ISBN (Electronic)078030585X
DOIs
StatePublished - Jan 1 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
Volume1992-October

Conference

Conference1992 Military Communications Conference, MILCOM 1992
CountryUnited States
CitySan Diego
Period10/11/9210/14/92

Fingerprint

Electric delay lines
Mean square error

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Doherty, J. F. (1992). A constrained LMS algorithm for interference rejection. In Military Communications Conference, MILCOM 1992 (pp. 696-700). [244140] (Proceedings - IEEE Military Communications Conference MILCOM; Vol. 1992-October). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MILCOM.1992.244140
Doherty, John F. / A constrained LMS algorithm for interference rejection. Military Communications Conference, MILCOM 1992. Institute of Electrical and Electronics Engineers Inc., 1992. pp. 696-700 (Proceedings - IEEE Military Communications Conference MILCOM).
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Doherty, JF 1992, A constrained LMS algorithm for interference rejection. in Military Communications Conference, MILCOM 1992., 244140, Proceedings - IEEE Military Communications Conference MILCOM, vol. 1992-October, Institute of Electrical and Electronics Engineers Inc., pp. 696-700, 1992 Military Communications Conference, MILCOM 1992, San Diego, United States, 10/11/92. https://doi.org/10.1109/MILCOM.1992.244140

A constrained LMS algorithm for interference rejection. / Doherty, John F.

Military Communications Conference, MILCOM 1992. Institute of Electrical and Electronics Engineers Inc., 1992. p. 696-700 244140 (Proceedings - IEEE Military Communications Conference MILCOM; Vol. 1992-October).

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

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AB - 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.

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Doherty JF. A constrained LMS algorithm for interference rejection. In Military Communications Conference, MILCOM 1992. Institute of Electrical and Electronics Engineers Inc. 1992. p. 696-700. 244140. (Proceedings - IEEE Military Communications Conference MILCOM). https://doi.org/10.1109/MILCOM.1992.244140