Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2006-11-07
2006-11-07
Vo, Don N. (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
Reexamination Certificate
active
07133473
ABSTRACT:
Joint equalization and decoding techniques to eliminate the division operations in the Frequency domain Equalizer (FEQ) of an Orthogonal Frequency Division Modulation (OFDM) receiver by incorporating the magnitude of the channel impulse response estimates into the decision metrics in the decoder. This includes methods for both hard-decision symbol-by-symbol detection and soft-decision decoding using the Viterbi algorithm. Further, Channel State Information (CSI) is incorporated to improve the performance of the receiver. The disclosure also introduces a computationally efficient bit-by-bit piecewise approximation technique incorporating CSI to implement decoder decision metrics. Finally, an efficient implementation technique for multiple receiver antennae using Maximum Ratio Combining (MRC) and Viterbi decoding with CSI is disclosed.
REFERENCES:
patent: 5289504 (1994-02-01), Wilson et al.
patent: 5303263 (1994-04-01), Shoji et al.
patent: 5432821 (1995-07-01), Polydoros et al.
patent: 5946292 (1999-08-01), Tsujishita et al.
patent: 6081562 (2000-06-01), He et al.
patent: 6219389 (2001-04-01), Pappas et al.
patent: 6317470 (2001-11-01), Kroeger et al.
patent: 6704903 (2004-03-01), Leung et al.
patent: 2001/0053143 (2001-12-01), Li et al.
patent: 2004/0114675 (2004-06-01), Crawford
patent: 1 128 592 (2001-08-01), None
patent: 1 164 760 (2001-12-01), None
ANSI/IEEE, ANSI/IEEE Std. 802.11, Information Technology—Telecommunications and Information Exchange Between Systems—Local and Metropolitan Area Networks—Specific Requirements, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, Aug. 20, 1999, pp. i-xvi and 1-153, IEEE, US.
IEEE, IEEE Std. 802.11a-1999, Supplement to IEEE Standard for Information Technology—Telecommunications and Information Exchange Between Systems—Local and Metropolitan Area Networks—Specific Requirements, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: High-Speed Physical Layer in the 5 GHZ Band, Dec. 30, 1999, pp. i-vii and 1-83, IEEE, US.
IEEE, IEEE Std. 802.11b-1999, Supplement to IEEE Standard for Information Technology—Telecommunications and Information Exchange Between Systems—Local and Metropolitan Area Networks—Specific Requirements, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: High-Speed Physical Layer Extension in the 2.4 GHZ Band, Feb. 20, 1999, pp. i-vii and 1-89, IEEE, US.
IEEE, IEEE P802.16a/D2-2002, IEEE Draft Standard for Local and Metropolitan Area Networks—Part 16: Air Interface for Fixed Broadband Wireless Access Systems—Medium Access Control Modifications and Additional Physical Layer Specifications for 2-11 GHz, 2002, pp. 1-253, IEEE, US.
Rappaport, Theodore, Wireless Communications Principles & Practice, 1995, pp. 325-332, Prentice Hall, US.
Forney, G. David Jr., The Viterbi Algorithm, Proceedings of the IEEE, Mar. 1973, pp. 268-278, vol. 61, No. 3, IEEE, US.
Lou, Hui-Ling, Implementing the Viterbi Algorithm, IEEE Signal Processing Magazine, 1995, pp. 42-52, IEEE, US.
Van Nee, Richard et al., OFDM for Wireless Multimedia Communications, Jan. 2000, Artech House Publishers, US.
Hutter, A.A. et al., On the Impact of Channel Estimation for Multiple Antenna Diversity Reception in Mobile OFDM Systems, 2000, 34thAnsilomar Conference, US.
U.S. Appl. No. 10/259,088, Lou et al.
U.S. Appl. No. 10/259,024, Lou et al.
IEEE Standards Dept., Further Higher-Speed Physical Layer Extension in the 2.4 GHz Band; IEEE Std 802.11g/D2.8 (Supplement to ANSI/IEEE Std 802.11 Edition), May 2002, pp. 1-48, IEEE, New York.
“802.16 IEEE Standard for Local and Metropolitan Area Networks; Part 16: Air Interface for Fixed Broadband Wireless Access Systems,” 802.16 IEEE Standard for Local and Metropolitan Area Networks, Oct. 1, 2004, pp. i-xxxiv and pp. 1-857, IEEE Std 802.16-2004, IEEE, United States.
Cheong Kok-Wui
Lou Hui-Ling
LandOfFree
Divisionless baseband equalization in symbol modulated... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Divisionless baseband equalization in symbol modulated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Divisionless baseband equalization in symbol modulated... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3702130