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Dual-Antenna RF CMOS Front-End for Interferer Removal in Ultra-Wideband Systems

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Abstract

Many ultra-wideband (UWB) systems are challenged by strong jammers and narrowband interferers. Using two antennas, we demonstrate a robust UWB radio frequency (RF) front-end design in a 0.25 μm mixed-signal complementary metal oxide semiconductor (CMOS) technology. The proposed realization is capable of adaptively removing a high-power, narrowband interferer early in the receiver chain avoiding front-end saturation and preserving UWB signal power. The early interferer removal resulting in interferer-free demodulation is based on the least mean squares (LMS) algorithm and achieved through a novel combiner low-noise amplifier and noise optimized filtering. Circuit level RF simulations of the proposed circuitry indicate a maximum improvement in signal-to-interference ratio of 39.6 dB.

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Authors and Affiliations

  1. Systems Engineering & Patents Ubidyne GmbH, Lise-Meitner-Strasse 14, 89081, Ulm, Germany

    Dirk K. Neumann

  2. Department of Electrical Engineering, 209N Walter Scott Engineering Center, University of Nebraska-Lincoln, P.O. Box 880511, Lincoln, NE, 68588-0511, USA

    Michael W. Hoffman & Sina Balkır

Authors
  1. Dirk K. Neumann
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  2. Michael W. Hoffman
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  3. Sina Balkır
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Correspondence to Dirk K. Neumann.

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Neumann, D.K., Hoffman, M.W. & Balkır, S. Dual-Antenna RF CMOS Front-End for Interferer Removal in Ultra-Wideband Systems. Circuits Syst Signal Process 27, 381–390 (2008). https://doi.org/10.1007/s00034-008-9029-8

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  • DOI: https://doi.org/10.1007/s00034-008-9029-8

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