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Theoretical Performance Analysis of an Image-Band Interference Canceller with Deterministic Imbalance Estimation
Satoshi DENNO Ke LIU Tatsuo FURUNO Masahiro MORIKURA
Publication
IEICE TRANSACTIONS on Communications
Vol.E94-B
No.4
pp.968-977 Publication Date: 2011/04/01 Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.968 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: cognitive radio, multimode, multiband, heterodyne reception, image-band interference, blind canceler, I/Q imbalance,
Full Text: PDF>>
Summary:
It is known that a heterodyne multimode receiver implemented with a single RF (Radio Frequency) receiver suffers from image-band interference due to imbalance, i.e. the phase error and the gain imbalance of the RF Hilbert transformer. The blind image band interference canceler with deterministic imbalance estimation that has been proposed mitigates the image-band interference. This performance of the image-band interference canceler is analyzed theoretically in this paper. As a result, it is revealed that estimation accuracy of the deterministic imbalance estimation is improved slightly as the imbalance becomes greater. In addition, it is also shown that the deterministic estimation achieves better performance as the power of image-band interference increases. The performance is confirmed by computer simulation.
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