A Software-Defined Radio Receiver Architecture Robust to Out-of-Band Interference


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Ru, Z. and Klumperink, E.A.M. and Wienk, G.J.M. and Nauta, B. (2009) A Software-Defined Radio Receiver Architecture Robust to Out-of-Band Interference. In: IEEE International Solid-State Circuits Conference, ISSCC 2009, 8-12 February 2009, San Francisco, CA, USA (pp. pp. 232-233).

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Abstract:In a software-defined radio (SDR) receiver it is desirable to minimize RF band-filtering for flexibility, size and cost reasons, but this leads to increased out-of-band interference (OBI). Besides harmonic and intermodulation distortion (HD/IMD), OBI can also lead to blocking and harmonic mixing. A wideband LNA [1, 2] amplifies signal and interference with equal gain. Even a low gain of 6dB can clip 0dBm OBI to a 1.2V supply, blocking the receiver. Hard-switching mixers not only translate the wanted signal to baseband but also the interference around LO harmonics. Harmonic rejection (HR) mixers have been used [3, 1, 4], but are sensitive to phase and gain mismatch. Indeed the HR in [4] shows a large spread, whereas other work only shows results from one chip [3, 1]. This paper describes techniques to relax blocking and HD/IMD, and make HR robust to mismatch.
Item Type:Conference or Workshop Item
Copyright:© 2009 IEEE
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/65508
Official URL:http://dx.doi.org/10.1109/ISSCC.2009.4977392
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