Wide frequency offset correction using encoded interburst...

Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C370S342000, C370S441000

Reexamination Certificate

active

06930989

ABSTRACT:
Systems and methods for wide frequency offset synchronization are provided. A synchronization data sequence is encoded onto a series of OFDM frequency domain bursts as interburst phase differences between training symbols included within the successive bursts. The interburst phase differences may also encode system configuration information. This technique may be used in conjunction with other synchronization techniques to greatly extend the frequency acquisition range achievable with low cost analog components.

REFERENCES:
patent: 5274629 (1993-12-01), Helard et al.
patent: 5282222 (1994-01-01), Fattouche et al.
patent: 5602835 (1997-02-01), Seki et al.
patent: 5625651 (1997-04-01), Cioffi
patent: 5732113 (1998-03-01), Schmidl et al.
patent: 5828710 (1998-10-01), Beale
patent: 5909470 (1999-06-01), Barratt et al.
patent: RE36430 (1999-12-01), Halbert-Lassalle et al.
patent: 6097776 (2000-08-01), Mesiwala
patent: 6158041 (2000-12-01), Raleigh et al.
patent: 6208695 (2001-03-01), Klank et al.
patent: 6252908 (2001-06-01), Tore
patent: 6275543 (2001-08-01), Petrus et al.
patent: 6282167 (2001-08-01), Michon et al.
patent: 6285654 (2001-09-01), Marchok et al.
patent: 6314082 (2001-11-01), Malmgren
patent: 6373861 (2002-04-01), Lee
patent: 6381251 (2002-04-01), Sano et al.
patent: 6452981 (2002-09-01), Raleigh et al.
patent: 6459679 (2002-10-01), Kim
patent: 6487253 (2002-11-01), Jones, IV et al.
patent: 6501730 (2002-12-01), Katsumoto
patent: 6546055 (2003-04-01), Schmidl et al.
patent: 6549592 (2003-04-01), Jones
patent: 6618352 (2003-09-01), Shirakata et al.
patent: 6618452 (2003-09-01), Huber et al.
patent: 6707856 (2004-03-01), Gardner et al.
patent: 0 823 804 (1998-02-01), None
U.S. Appl. No. 09/469,715; filed Dec. 21, 1999, entitled “Wide Range Frequency Offset Estimation in OFDM Systems,” by J. Gardner et al. pp 1-22 & Figs. 1-6.
IEEE Standard 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. Sep. 1999, pp. 1-83.
Nogami et al., “A Frequency and Timing Period Acquisition Technique for OFDM Systems,” 1995 IEEE, pp. 1010-1015.
Schmidl et al. “Low-Overhead, Low-Complexity [Burst] Synchronization for OFDM,” Stanford University, Stanford, CA 94305.
Sandell et al. “Timing and Frequency Synchronization in OFDM Systems Using the Cyclic Prefix,” Luleå University of Technology, S-971 87, Luleå Sweden.
Jones et al., “Improved OFDM channel identification”, 1999, U.S. Appl. No. 09/234,929.
Jones et al., “Differential OFDM using multiple receiver antennas”, 1999, U.S. Appl. No. 09/282,589.
Rohling et al., “Differential amplitude phase shift keying (DAPSK)—A new modulation method for DTVB”, 1995, International Broadcasting Convention, Conference Publication No. 413.
John G. Proakis, “Digital communications”, 3rdEdition, Ch. 5: Optimum Receivers for the Additive White Gaussian Noise Channel, pp. 274-278.

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

Wide frequency offset correction using encoded interburst... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wide frequency offset correction using encoded interburst..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide frequency offset correction using encoded interburst... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3502110

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