Title:
METHOD FOR OBTAINING HYBRID DOMAIN COMPENSATION PARAMETER OF ANALOG LOSS IN OFDM COMMUNICATION SYSTEM AND METHOD FOR COMPENSATING THE PARAMETER
Document Type and Number:
WIPO Patent Application WO/2010/061532
Kind Code:
A1
Abstract:
In a transmission/reception system, a carrier frequency offset (CFO), an I/Q imbalance, and a DC offset (DCO) are main causes of a large signal distortion. Various techniques have been suggested for compensating each of the analog losses or two of the analog losses in combination. However, no technique has been suggested for simultaneously compensating the three types of losses occurring at the same time in an actual device.
Provided is a new pilot signal having a cyclic signal portion and two equally arranged continuous signal portions. These signal portions are used to simultaneously execute a compensation in the time region and a channel estimation so as to compensate the CFO, the I/Q imbalance, and the DCO. Moreover, in the OFDM method, the I/Q imbalance of the transmitter side and the channel response are also compensated.
Inventors:
LIN HAI (JP)
YAMASHITA KATSUMI (JP)
YAMASHITA KATSUMI (JP)
Application Number:
PCT/JP2009/005834
Publication Date:
June 03, 2010
Filing Date:
November 02, 2009
Export Citation:
Assignee:
UNIV OSAKA PREFECT PUBLIC CORP (JP)
LIN HAI (JP)
YAMASHITA KATSUMI (JP)
LIN HAI (JP)
YAMASHITA KATSUMI (JP)
International Classes:
H04J11/00; H04B7/04
Domestic Patent References:
| WO2009041671A1 | 2009-04-02 | |||
| WO2009060874A1 | 2009-05-14 |
Foreign References:
| JP2009164974A | 2009-07-23 | |||
| JP2009130634A | 2009-06-11 | |||
| JP2007180618A | 2007-07-12 |
Other References:
HAI LIN ET AL.: "Hybrid Domain Compensation for Analog Impairments in OFDM Systems", GLOBAL TELECOMMUNICATIONS CONFERENCE, 2008. IEEE GLOBECOM 2008, 30 November 2008 (2008-11-30), pages 1 - 5
TAKESHI HATTORI: "OFDM/OFDMA Kyokasho", IMPRESS HYOJUN KYOKASHO SERIES, 21 September 2008 (2008-09-21), pages 174 - 175
YOUNGHWAN JIN ET AL.: "Additional Diversity Gain in OFDM Receivers under the Influence of IQ Imbalances", COMMUNICATIONS, 2007. ICC '07. IEEE INTERNATIONAL CONFERENCE ON,, 24 June 2007 (2007-06-24), pages 5915 - 5920
HAI LIN ET AL.: "Blind Estimation of Carrier Frequency Offset and DC Offset for OFDM Systems", COMMUNICATIONS, IEEE TRANSACTIONS ON, vol. 56, no. ISS.5, May 2008 (2008-05-01), pages 704 - 707
HAI LIN ET AL.: "Subcarrier allocation based compensation for carrier frequency offset and I/Q imbalances in OFDM systems", WIRELESS COMMUNICATIONS, IEEE TRANSACTIONS ON, vol. 8, no. ISS.1, January 2009 (2009-01-01), pages 18 - 23
GUANBIN XING ET AL.: "Frequency offset and I/Q imbalance compensation for direct-conversion receivers", WIRELESS COMMUNICATIONS, IEEE TRANSACTIONS ON, vol. 4, no. ISS.2, March 2005 (2005-03-01), pages 673 - 680
TAKESHI HATTORI: "OFDM/OFDMA Kyokasho", IMPRESS HYOJUN KYOKASHO SERIES, 21 September 2008 (2008-09-21), pages 174 - 175
YOUNGHWAN JIN ET AL.: "Additional Diversity Gain in OFDM Receivers under the Influence of IQ Imbalances", COMMUNICATIONS, 2007. ICC '07. IEEE INTERNATIONAL CONFERENCE ON,, 24 June 2007 (2007-06-24), pages 5915 - 5920
HAI LIN ET AL.: "Blind Estimation of Carrier Frequency Offset and DC Offset for OFDM Systems", COMMUNICATIONS, IEEE TRANSACTIONS ON, vol. 56, no. ISS.5, May 2008 (2008-05-01), pages 704 - 707
HAI LIN ET AL.: "Subcarrier allocation based compensation for carrier frequency offset and I/Q imbalances in OFDM systems", WIRELESS COMMUNICATIONS, IEEE TRANSACTIONS ON, vol. 8, no. ISS.1, January 2009 (2009-01-01), pages 18 - 23
GUANBIN XING ET AL.: "Frequency offset and I/Q imbalance compensation for direct-conversion receivers", WIRELESS COMMUNICATIONS, IEEE TRANSACTIONS ON, vol. 4, no. ISS.2, March 2005 (2005-03-01), pages 673 - 680
Attorney, Agent or Firm:
HIROKOH, MASAKI (JP)
Hiroyuki right tree (JP)
Hiroyuki right tree (JP)
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