Efficient doppler compensation method and receiver for...

Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07424062

ABSTRACT:
A receiver and method of enhancing transmitted data signals in a wireless communications system includes wirelessly transmitting and receiving a data signal over a wireless channel in the communications system; providing known channel parameters corresponding to the wireless channel; expressing the data signal as an input data vector; replacing indexes in the input data vector having a magnitude greater than one into indexes in the input data vector having a unit norm; creating an output data vector; and calculating a dot product of (i) the input data vector comprising replaced indexes; and (ii) the output data vector, wherein the calculating process equalizes the data signal received by a receiver in the presence of Doppler frequency shifts of the data signal.

REFERENCES:
patent: 2005/0026565 (2005-02-01), Goldstein et al.
patent: 2005/0265467 (2005-12-01), Dabak et al.
Bai et al. An Equalization Method for OFDM in Time Varying Multipath Channels, IEEE, 2004, p. 1740-1743.
Nakamura et al. New Estimation and Equalization Approach for OFDM under Doppler-Spread Channel, IEEE, 2002, p. 555-560.
Wooding, R., “The Multivariate Distribution of Complex Normal Variables,” Biometrika, vol. 43, Parts 1 and 2, Issued, Jun. 1956, pp. 212-215.
Armstrong, J., “Analysis of New and Existing Methods of Reducing Intercarrier Interference Due to Carrier Frequency Offset in OFDM,” IEEE Transactions on Communications, vol. 47, No. 3, Mar. 1999, pp. 365-369.
Scaglione, A., et al., “Redundant Filterbank Precoders and Equalizers Part I: Unification and Optimal Designs,” IEEE Transactions on Signal Processing, vol. 47, No. 7, Jul. 1999, pp. 1989-2006.
Dong, X., et al., “Symbol Error Probability of Two-Dimensional Signaling in Ricean Fading With Imperfect Channel Estimation,” IEEE Transactions on Vehicular Technology, vol. 54, No. 2, Mar. 2005, pp. 538-549.
Zhao, Y., et al., “Intercarrier Interference Self-Cancellation Scheme for OFDM Moible Communication Systems,” IEEE Transactions on Communications, vol. 49, No. 7, Jul. 2001, pp. 1185-1191.
Gorokhov, A., et al., “Robust OFDM Receivers for Dispersive Time-Varying Channels: Equalization and Channel Acquisition,” IEEE Transactions on Communications, vol. 52, No. 4, Apr. 2004, pp. 572-583.
Pham-Gia, T., et al., “Density of the Ratio of Two Normal Random Variables,” Communications in Statistics: Theory and Methods, vol. 35, Issue 9, 2006.
Kaleh, G., “Channel Equalization for Block Transmission Systems,” IEEE Journal on Selected Areas in Communications, vol. 13, No. 1, Jan. 1995, pp. 110-121.
Muquet, B., et al., “Cyclic Prefixing or Zero Padding for Wireless Multicarrier Transmissions?,” IEEE Transactions on Communications, vol. 50, No. 12, Dec. 2002, pp. 2136-2148.
Vorobyov, S., et al., “Robust Iterative Fitting of Multilinear Models,” IEEE Transactions on Signal Processing, vol. 53, No. 8, Aug. 2005, pp. 2678-2689.
Tureli, U., et al., “OFDM Blind Carrier Offset Estimation: ESPRIT,” IEEE Transactions on Communications, vol. 48, No. 9, Sep. 2000, pp. 1459-1461.

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

Efficient doppler compensation method and receiver for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Efficient doppler compensation method and receiver for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Efficient doppler compensation method and receiver for... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3976353

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