Method and apparatus for reference symbol aided channel...

Pulse or digital communications – Receivers – Particular pulse demodulator or detector

Reexamination Certificate

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C375S350000

Reexamination Certificate

active

11098208

ABSTRACT:
A system that includes a receiver (100) that is configured for: selecting (210) a set of demodulator output samples and a corresponding set of reference symbols; generating (220) a set of raw channel estimates based on the set of demodulator output samples and the corresponding set of reference symbols; subdividing (230) the set of raw channel estimates into a plurality of subsets; assigning and applying (240) a corresponding reference symbol magnitude quantization scheme to each subset; determining (250) a set of filter coefficients that is based on the quantization schemes applied to the subsets of raw channel estimates; and combining (260) the set of raw channel estimates with the set of filter coefficients to generate a channel estimate.

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Rim, et al., Decision-directed Channel Estimation for M-QAM-modulated OFDM Systems; pp. 1742-1746, 2002 IEEE Vehicular Technology Conference.
Edfors, et al, OFDM Channel Estimation by Singular Value Decomposition; IEEE Transactions on Communications, vol. 46, No. 7, Jul. 1998.

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