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Research Letters in Communications
Volume 2009 (2009), Article ID 541084, 4 pages
http://dx.doi.org/10.1155/2009/541084
Research Letter

A Reduced-Complexity Mixer Linearization Scheme

Centre for Communications Research, University of Bristol, Bristol BS8 1UB, UK

Received 20 May 2009; Accepted 22 July 2009

Academic Editor: Nikos Sagias

Copyright © 2009 Paul A. Warr and Alan M. Potter. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Measurement results of the signals emanating from both IF and LO ports of a double balanced mixer are presented, and, thus, it is shown that the linearization of the output in a down-converting mixer by the summation of the IF signal and the signal emanating from the LO or RF port is feasible. Feedforward-based architectures for the linearization of down-conversion mixers are introduced that exploit this phenomenon, and linearity performance results of the frequency translation of both two-tone and TETRA-modulated signals are presented. This technique employs only a single mixer and hence overcomes the complexity of other mixer linearization schemes. The overall processing gain of the system is limited by the level of wanted signal present in the error signal.