Title :
A Two-Stage Approach to Harmonic Rejection Mixing Using Blind Interference Cancellation
Author :
Moseley, N.A. ; Klumperink, E.A.M. ; Nauta, B.
Author_Institution :
IC-Design Group, Univ. of Twente, Enschede
Abstract :
Current analog harmonic rejection mixers typically provide 30-40 dB of harmonic rejection, which is often not sufficient. We present a mixed analog-digital approach to harmonic rejection mixing that uses a digital interference canceler to reject the strongest interferer. Simulations indicate that, given a practical RF scenario, the digital canceler is able to improve the signal-to-interference ratio by 30-45 dB.
Keywords :
CMOS integrated circuits; adaptive filters; cognitive radio; mixed analogue-digital integrated circuits; mixers (circuits); CMOS integration; adaptive filter; blind interference cancellation; cognitive radio; digital interference canceler; harmonic rejection mixing; mixed analog-digital approach; signal-to-interference ratio; switching mixers; Aggregates; Analog-digital conversion; Baseband; Interference cancellation; Power harmonic filters; RF signals; Radio frequency; Signal generators; TV; Transmitters; Adaptive filter; CMOS; I/Q imbalance; LMS; cognitive radio; gain and phase mismatch; harmonic rejection mixing; interference canceling; software-defined radio; switching mixers;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2008.926796
