By Topic

A modified LMS adaptive filter architecture with improved stability at RF

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Aparin, V. ; QUALCOMM Inc., San Diego, CA, USA

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 0.25μm 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.

Published in:

Solid-State Circuits Conference, 2005. ESSCIRC 2005. Proceedings of the 31st European

Date of Conference:

12-16 Sept. 2005