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A modified LMS adaptive filter architecture with improved stability at RF | IEEE Conference Publication | IEEE Xplore

A modified LMS adaptive filter architecture with improved stability at RF


Abstract:

Stability of a conventional LMS adaptive filter at RF is analyzed using the Laplace transform. It is shown that the RF signal delays along the filter feedback loop can ma...Show More

Abstract:

Stability of a conventional LMS adaptive filter at RF is analyzed using the Laplace transform. It is shown that the RF signal delays along the filter feedback loop can make it unstable. A simple modification to the filter architecture is proposed to improve the loop phase margin. A practical implementation of the proposed architecture in 0.25/spl mu/m CMOS technology is described. The designed filter is used as part of a cellular-band CDMA receiver to reject a transmitter signal leakage at the mixer input. It achieved the maximum rejection of 28dB.
Date of Conference: 12-16 September 2005
Date Added to IEEE Xplore: 05 December 2005
Print ISBN:0-7803-9205-1
Print ISSN: 1930-8833
Conference Location: Grenoble, France

References

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