Method and system for adaptive channel estimation in pilot...

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

Reexamination Certificate

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C375S316000

Reexamination Certificate

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07978791

ABSTRACT:
A method includes generating a plurality of noise-averaged channel estimates using noisy channel estimates. At least some of the noise-averaged channel estimates are generated using different averaging lengths. The method also includes selecting one of the averaging lengths based on the plurality of noise-averaged channel estimates. The step of selecting one of the averaging lengths may include subtracting the noise-averaged channel estimates from the noisy channel estimates to produce a plurality of noise-averaged differences and determining powers of the noise-averaged differences. The step of selecting one of the averaging lengths may also include determining total error powers associated with the different averaging lengths using the powers of the noise-averaged differences and selecting the averaging length corresponding to a lowest total error power.

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Marcus Benthin et al., “Influence of Channel Estimation on the Performance of a Coherent DS-CDMA System”, IEEE Transactions on Vehicular Technology, vol. 46, No. 2, May 1997, pp. 262-268.
Dong Xiaojian et al., “A Frequency Domain Error Analysis for Channel Estimation with Variable Averaging Interval”, 2001 IEEE, pp. 582-584.

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