Time domain estimation of IQ imbalance in a wireless OFDM...

Details Time domain estimation of IQ imbalance in a wireless OFDM... Time domain estimation of IQ imbalance in a wireless OFDM...

2008-04-29

2008-04-29

Wang, Ted (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S260000, C375S316000, C375S340000, C375S345000

Reexamination Certificate

active

07366255

ABSTRACT:
An OFDM receiver is configured for suppressing pilot energy, and DC energy, from received I and Q components prior to estimating amplitude and phase imbalances of the received I and Q components. Hence, amplitude and phase imbalances can be estimated accurately despite channel fading and frequency variations between the transmitter and receiver.

REFERENCES:
patent: 6370211 (2002-04-01), Carsello
patent: 6721547 (2004-04-01), Husted et al.
patent: 2002/0118783 (2002-08-01), Cripps et al.
Adaptive compensation for imbalance and offset losses in direct conversion transceivers, Cavers, J.K.; Liao, M.W.; Vehicular Technology, IEEE Transactions on vol. 42, Issue 4, Nov. 1993 pp. 581-588, Digital Object Identifier 10.1109/25.260752 □□.
IEEE Std. 802.11a-1999, “Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: High-speed Physical Layer in the 5 GHZ Band”, L.AN/MAN Standards Committee of the IEEE Computer Society, IEEE-SA Standards Board, Approved Sep. 16, 1999, New York, USA.

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