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Abstract

A transmitter comprises: sequence transformation circuitry operable to apply a first and second transformation sequences to first and second data bits, respectively, to generate first and second transformed data bits; FEC encoder circuitry operable to generate redundancy bits based on the first transformed data bits, one or more first index bits representing an index of the first transformation sequence, the second transformed data bits, and one or more second index bits representing an index of the second transformation sequence, and output a codeword comprising the first transformed data bits, the first index bits, the second transformed data bits, the second index bits, and the redundancy bits; and modulator circuitry operable to generate first and second OFDM symbols carrying the first and second transformed data bits, respectively, the first and second index bits, respectively, and first and second portions of the redundancy bits, respectively.

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First Claim