Adaptive filter based low complexity digital intensive harmonic rejection for SDR receiver

Harmonic rejection mixing is indispensable in software defined radio receivers employing switched mixers. Current analog multi-path mixing solution suffers from phase and gain mismatches along the paths and as a consequence cannot provide sufficient harmonic rejection. In this paper, we present a low complexity flexible digital intensive harmonic rejection architecture and show how it can be used to enhance the rejection of any single harmonic interference by adaptively combining the different mixing paths. Simulation results show that the proposed method can reject any single interferer adaptively by over 80 dB, which is sufficient for practical applications.

[1]  N. A. Moseley,et al.  Digitally Enhanced Software-Defined Radio Receiver Robust to Out-of-Band Interference , 2009, IEEE Journal of Solid-State Circuits.

[2]  Minjae Lee,et al.  An 800-MHz–6-GHz Software-Defined Wireless Receiver in 90-nm CMOS , 2006, IEEE Journal of Solid-State Circuits.

[3]  B. Widrow,et al.  Adaptive noise cancelling: Principles and applications , 1975 .

[4]  Kwyro Lee,et al.  A CMOS Harmonic Rejection Mixer With Mismatch Calibration Circuitry for Digital TV Tuner Applications , 2008, IEEE Microwave and Wireless Components Letters.

[5]  Jaeyoung Choi,et al.  A CMOS Wideband RF Front-End With Mismatch Calibrated Harmonic Rejection Mixer for Terrestrial Digital TV Tuner Applications , 2010, IEEE Transactions on Microwave Theory and Techniques.

[6]  Nikolaus Klemmer,et al.  A SAW-less multiband WEDGE receiver , 2009, 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[7]  S. Haykin,et al.  Adaptive Filter Theory , 1986 .

[8]  Eric A. M. Klumperink,et al.  A Two-Stage Approach to Harmonic Rejection Mixing Using Blind Interference Cancellation , 2008, IEEE Transactions on Circuits and Systems II: Express Briefs.

[9]  Serge Toutain,et al.  A 60 dB Harmonic Rejection Mixer for Digital Terrestrial TV Tuner , 2012, IEEE Transactions on Circuits and Systems I: Regular Papers.

[10]  Sang-Gug Lee,et al.  A 50-300-MHz low power and high linear active RF tracking filter for digital TV tuner ICs , 2010, IEEE Custom Integrated Circuits Conference 2010.

[11]  Eric A. M. Klumperink,et al.  A 400-to-900 MHz receiver with dual-domain harmonic rejection exploiting adaptive interference cancellation , 2009, 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[12]  Rudy Lauwereins,et al.  A Generic Framework for Optimizing Digital Intensive Harmonic Rejection Receivers , 2012, 2012 IEEE Workshop on Signal Processing Systems.