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This paper proposes a novel time domain blind compensation for frequency-independent and frequency-dependent I/Q imbalance in direct-conversion receivers. Analysis of a difference filter representing the frequency-dependent I/Q imbalance shows that the filter taps are tightly constrained by analog front-end image attenuation (IA). For practical front-ends with reasonable IA, it is proved that the...
A novel blind frequency-dependent I/Q imbalance compensation for direct-conversion receivers is proposed. By analyzing the filter which represents branch mismatches, we prove its minimum phase response, for practical front-ends with reasonable image attenuation quality. We also reveal that the received branch signals will have the same autocorrelation in the absence of frequency-dependent imbalance...
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