Versatile system for dual carrier transformation in...

Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions

Reexamination Certificate

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C370S203000, C370S252000, C370S210000, C375S130000

Reexamination Certificate

active

07668075

ABSTRACT:
Embodiments of the invention provide a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system, particularly an ultra-wideband (UWB) system. The present invention provides a data input, which passes data to a randomizer. The data then passes to a convolutional code function (206), the output of which is punctured by puncturing function. An interleaver function receives the punctured code data, and cooperatively operates with a mapper element to prepare the coded data for pre-transmission conversion by an IFFT. The mapper element comprises a dual carrier modulation function, which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones.

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Anuj Batra et al; IEEE P802.15; Wireless Personal Area Networks; Jul. 2003; IEEE P802.15-03/268r0; pp. 1-71.
Anuj Batra et al; Design of a Multiband OFDM System for Realistic UWB Channel Environments; IEEE Transactions on Microwave Theory and Techniques, vol. 52, No. 9, Sep. 2004; pp. 2123-2138.

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