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Published October 2008 | Published
Book Section - Chapter Open

Digitally-Assisted Linearization of Wideband Direct Conversion Receivers

Abstract

A SAW-less direct-conversion receiver is presented which utilizes a mixed-signal feedforward path to regenerate and equalize IM3 products, thus accomplishing system-level linearization. The receiver system performance is dominated by a custom integrated front end realized in 130nm CMOS and achieves an uncorrected out-of-band IIP3 of -7.1dBm under the worst-case UMTS FDD Region 1 blocking specifications. IM3 equalization results in an effective IIP3 of +5.3dBm and reduces total input-referred error by over 23dB.

Additional Information

© 2008 IEEE. The authors thank F. Bohn for the frequency divider IP and H. Mani and J. Yoo for testing assistance. This project was supported by an NDSEG fellowship and the Lee Center for Advanced Networking.

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August 19, 2023
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