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Phase Offset Correction using Early-Late Phase Compensation in Direct Conversion Receiver  

Kim Young-Wan (군산대학교 전자정보공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.9, no.3, 2005 , pp. 638-646 More about this Journal
Abstract
In recent wireless communications, direct conversion transceiver or If sampling SDR-based receivers have being designed as an alternative to conventional transceiver topologies. In direct conversion receiver a.chitectu.e, the 1.equency/phase offset between the RF input signal and the local oscillator signal is a major impairment factor even though the conventional AFC/APC compensates the service deterioration due to the offset. To rover the limited tracking range of the conventional method and effectively aid compensation scheme in terms of I/Q channel imbalances, the frequency/phase offset compensation in RF-front end signal stage is proposed in this paper. In RF-front end, the varying phase offset besides the fixed large frequency/phase offset are corrected by using early-late phase compensator. A more simple frequency and phase tacking function in digital signal processing stage of direct conversion receiver is effectively available by an ingenious frequency/phase offset tracking method in RF front-end stage.
Keywords
Phase Offset Correction; Direct Conversion Receiver; Early-Late Phase Compensation;
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1 James K. Cavers and Maria W. Liao 'Adaptive Compensation for Imbalance and Offset Losses in Direct Conversion Transceivers', IEEE Trans. on Vehicular Technology, Vol. 42, No.4, pp. 581-588, 1993   DOI   ScienceOn
2 John G. Proakis, Digital communications, 4th ed. McGraw-Hill, Boston, 2001
3 Ji Li. R. G. Bosisio and Ke Wu, 'A six-port direct digital millimeter wave receiver.' IEEE National Telesystems Conf., pp. 79-82, 1994
4 Serioja Ovidiu Tatu, Emilia Moldovan, Ke Wu, 'A New Direct Millimeter-Wave Six-Port Receiver,' IEEE Trans. on Microwave Theory and Techniques, Vol. 49, No. 12, pp.2517-2522, 2001   DOI   ScienceOn
5 Xinping Huang, 'On Transmitter Gain/Phase Imbalance Compensation At Receiver', IEEE Communications on Letters, Vol. 4, No.4, pp. 363-365, 2000   DOI   ScienceOn
6 Behzad Razavi, 'Design Considerations for Direct-Conversion Receiver', IEEE Trans. on Circuits and Systems, Vol. 44, No.6, pp. 428-435, 1997   DOI   ScienceOn