Experimental Verification of a Harmonic-Rejection Mixing Concept using Blind Interference Canceling


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Moseley, N.A. and Klumperink, E.A.M. and Nauta, B. (2008) Experimental Verification of a Harmonic-Rejection Mixing Concept using Blind Interference Canceling. In: European Wireless Technology Conference, EuWIT 2008, 27-28 Okt 2008, Amsterdam, the Netherlands.

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Abstract:Abstract—This paper presents the first practical experiments
on a harmonic rejection downconverter, which offers up to 75 dB of harmonic rejection, without an RF filter. The downconverter uses a two-stage approach; the first stage is an analog multipath/ multi-phase harmonic rejection mixer followed by a second stage providing additional harmonic rejection based on blind adaptive interference canceling in the discrete-time domain. The aim is to show its functional operation and to find practical performance limitations. Measurement results show that the harmonic rejection of the downconverter is insensitive to frontend nonlinearities and LO phase noise. The canceler cannot cope with DC offsets. The DC offsets are removed by highpass filters. The signal paths used to obtain an estimate of the interference must
be designed to provide as much attenuation of the desired signal as possible.
Item Type:Conference or Workshop Item
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/65312
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