By Topic

A Nonrecursive Digital Calibration Technique for Joint Elimination of Transmitter and Receiver I/Q Imbalances With Minimized Add-On Hardware

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
$33 $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

7 Author(s)
Wei-Han Yu ; Dept. of Electr. & Comput. Eng., Univ. of Macau, Macau, China ; Chak-Fong Cheang ; Pui-In Mak ; Weng-Fai Cheng
more authors

A nonrecursive digital calibration technique, namely, local oscillator (LO) switching, is proposed for jointly eliminating transmitter (TX) and receiver (RX) I/Q imbalances in one combined process. The add-on analog parts are limited to a set of source followers (0.00228 mm2) and metal-oxide-semiconductor (MOS) switches (0.00017 mm2 ) for reusing the 90 ° phase shift property of the reference LO, avoiding the sinusoidal test tone, loop-back detector, high-speed analog-to-digital converter, and 2-D iterative search algorithm, mostly required in the prior art. A 65-nm complementary MOS transceiver, which is codesigned with a field-programmable-gate-array-based coordinate rotation digital computer algorithm, measures a 10-dB improvement in the image rejection ratio of both the TX (27.8 → 37.2 dB) and the RX (31.2 → 42 dB). The required digital circuitry for the algorithm is also assessed and simulated.

Published in:

IEEE Transactions on Circuits and Systems II: Express Briefs  (Volume:60 ,  Issue: 8 )