Digital pre-distortion for orthogonal frequency division...

Pulse or digital communications – Transmitters – Antinoise or distortion

Reexamination Certificate

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Reexamination Certificate

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07924941

ABSTRACT:
A method (300) and a system (100) for processing an orthogonal frequency division multiplexing (OFDM) signal. At least one portion of an OFDM symbol (125) that exceeds an amplitude limiting threshold can be identified. The identified portion of the OFDM symbol (125) can be filtered to generate a pre-distortion noise (145). The OFDM symbol (125) and the pre-distortion noise (145) can be combined to generate a pre-distorted OFDM symbol (165).

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Li, Xiaodong et al.: Effects of Clipping and Filtering on the Performance of OFDM, Proceedings of IEEE VTC'97, 1997, pp. 1634-1638.
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