Channel tracking with scattered pilots

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

Reexamination Certificate

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C375S346000

Reexamination Certificate

active

07961804

ABSTRACT:
According to the disclosure, a system adapted to estimate and track a channel for wireless orthogonal frequency division modulation (OFDM) communication is disclosed. The system utilizes scattered pilot symbols being subject to channel conditions and estimates the channel value using the plurality of received pilot symbols and in accordance with correlation of the channel conditions over time.

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Hong He, et al., “Low-Complexity Kalman Channel Estimator Structures of OFDM Systems With and Without Virtual Carriers,” IEEE International Conference on Paris, France, pp. 2447-2451, XP010709701, 2004.
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Schafhuber, et al., “Kalman Tracking of Time-Varying Channels in Wireless MIMO-OFDM Systems,” Institute of Communications and Radio-Frequency Engineering, Vienna University of Technology, pp. 1261-1265, XP010702345, 2003.
Sen, et al, “Joint Channel Tracking and Symbol Detection for OFDM Systems with Kalman Filtering,” AEU International Journal of Electronics and Communications, pp. 317-327, XP004959696, 2003.

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