Channel estimator

Details Channel estimator Channel estimator

2008-04-29

2008-04-29

Wang, Ted (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S130000, C375S148000, C375S229000, C375S340000, C375S349000

Reexamination Certificate

active

07366259

ABSTRACT:
The present invention is a channel estimator based on the values of received data and on a priori probabilities only of received symbols. The channel estimator includes a symbol probability generator, a noise variance estimator and a channel tap estimator. The symbol probability generator generates a priori probabilities only of transmitted symbols found in the received signal(s). The noise variance estimator estimates at least one noise variance corrupting the received signal(s). The channel tap estimator generates channel estimates from the received signal(s), the a priori probabilities and the noise variance(s).

REFERENCES:
patent: 5544156 (1996-08-01), Teder et al.
patent: 5867538 (1999-02-01), Liu
patent: 5887035 (1999-03-01), Molnar
patent: 6034986 (2000-03-01), Yellin
patent: 6084862 (2000-07-01), Bjork et al.
patent: 6377607 (2002-04-01), Ling et al.
patent: 6442218 (2002-08-01), Nakamura et al.
patent: 6539067 (2003-03-01), Luschi et al.
patent: 6603823 (2003-08-01), Yellin et al.
Schramm et al., “Pilot Symbol Assisted BPSK on Rayleigh Fading Channels with Diversity: Performance Analysis and Parameter Optimization”, IEEE Transactions on Communications, vol. 46. No. 12, Dec. 1998, pp. 1560-1563.
Siala et al., “Maximum A Posterfori Multipath Fading Channel Estimation for CDMA Systems”, Proceedings of Vehicular Technology Conference, Houston, Texas, May 1999.
3GPP RAN 25.214, v1.1.1,(Sep. 1999) Physical Layer Procedures.
Turkboylari et al., “An Efficient Algorithm for Estimating the Signal-to-Interference Ration in TDMA Cellular Systems”, IEEE Transactions on Communications, vol. 46, No. 6, Jun. 1998, pp. 728-731.
Press et al., Numerical Recipes In C: The Art of Scientific Computing, 2nd Edition, Cambridge University Press, 1992.
Andoh et al., “Channel estimation Using Time Multiplexed Pilot Symbols for Coherent Rake Combining for DS-CDMA Mobile Radio”, Proceedings of the IEEE Vehicular Technology Conference, 1997, pp. 954-958.
Adachi et al., “Wideband Wireless Access Based on DS-CDMA”, IEEE Transactions on Communications, pp. 1305-1316, Jul. 1998.
Adachi et al., “Wideband DS-CDMA for Next-Generation Mobile Communications Systems”, IEEE Communications Magazine, Sep. 1998, pp. 56-69.
3GPP RAN TS 25.215, v0.0.1 (Sep. 1999) Physical Layer—Measurements.

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