Pilot estimation using prediction error method-switched filters

Multiplex communications – Communication over free space – Repeater

Reexamination Certificate

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Details

C370S335000, C370S342000, C375S232000, C375S346000

Reexamination Certificate

active

07061882

ABSTRACT:
A system is disclosed for use in a wireless communication system to provide an estimated pilot signal. The system includes a receiver and a front-end processing and despreading component in electronic communication with the receiver for despreading a CDMA signal. A pilot estimation component is in electronic communication with the front-end processing and despreading component for estimating an original pilot signal using a pilot estimator that includes more than one filter and that includes a switching method for using the more than one filter. The switching method uses a prediction error. A demodulation component is in electronic communication with the pilot estimation component and the front-end processing and despreading component for providing demodulated data symbols.

REFERENCES:
patent: WO03015364 (1899-12-01), None
patent: 03015364 (2003-02-01), None
XP-002254352, Channel Estimation for 3G Wideband CDMA Systems Using the Kalam Filter Algorithm, K. Sam Shanm ugan.
Massicotte et al (US 2004/0136444) , Cascade Filter Receiver for DS-CDMA Communication Systems.
Subrahmanya et al (US 2003/0072277), Adaptive Pilot Filter for a Wireless Communication Systems.
Shanmugan, K. (2000) Channel estimation for 3G wideband CDMA systems using the kalman filtering algorithm. IEEE pp. 95-97, XP002254352.

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