Enhanced frequency domain equalization in OFDM communication

Multiplex communications – Generalized orthogonal or special mathematical techniques – Quadrature carriers

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C370S252000, C370S338000

Reexamination Certificate

active

07099267

ABSTRACT:
A technique for enhanced frequency domain equalization in an OFDM communication receiver enables derivation of a more accurate estimate of channel gain fluctuation by adding an additional frequency tone observation to the estimate. For example, the technique may involve estimation of an unknown, complex, channel-induced gain A based on observation of complex amplitude values for first and second preamble symbols transmitted in an OFDM frame, plus the complex amplitude value for a signal field in the OFDM frame. The enhanced frequency domain equalization technique may be especially useful in a network conforming to the IEEE 802.11a standard.

REFERENCES:
patent: 5796814 (1998-08-01), Brajal et al.
patent: 6141393 (2000-10-01), Thomas et al.
patent: 6182251 (2001-01-01), Rahnema et al.
patent: 6441786 (2002-08-01), Jasper et al.
patent: 6496144 (2002-12-01), Tanaka et al.
patent: 6549583 (2003-04-01), Crawford
patent: 6563885 (2003-05-01), Magee et al.
patent: 6603734 (2003-08-01), Oksanen
“High-speed Physical Layer in the 5 GHz Band” Part 11: Wireless LAN Medium Acces Control (MAC) and Physical Layer (PHY) specifications, IEEE Std 802.11a-1999.
“Wireless OFDM Systems” Lecture by Prof. Robert W. Heath, Jr., Telecommunications and Signal Processing Research Center, The University of Texas at Austin, http://wireless.ece.utexas.edu/˜bevans/courses/realtime/lectures/20—OFDM, Nov. 2001.
“ Wireless OFDM LAN,” Vocal Technologies, Ltd., IEEE 802.11a-0004A-1, 2001.
“OFDM Channel Estimation by Singular Value Decomposition” O. Edfors et al., IEEE Trans. Comm. vol. 46, No. 7, Jul. 1998.
“Channel Estimation for OFDM Systems Based on Comb-Type Pilot Arrangement in Frequency Selective Fading Channels” M. H. Hsieh and C. H. Wei, IEEE Trans. Consumer Electric, vol. 44, No. 1, Feb. 1998.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Enhanced frequency domain equalization in OFDM communication does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Enhanced frequency domain equalization in OFDM communication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced frequency domain equalization in OFDM communication will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3632235

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.