Patent ID: 8831124

Claim:
A transmitter comprising: circuitry comprising a symbol mapper circuit and being operable in at least two modes, wherein: while said circuitry operates in a first of said modes, the number of symbols output by said symbol mapper circuit for a first-mode orthogonal frequency division multiplexing (OFDM) symbol transmitted by said transmitter is greater than the number of data-carrying subcarriers used to transmit said first-mode OFDM symbol; while said circuitry operates in a second of said modes, the number of symbols output by said symbol mapper circuit for a second-mode orthogonal frequency division multiplexing (OFDM) symbol transmitted by said transmitter is less than or equal to the number of data-carrying subcarriers used to transmit said second-mode OFDM symbol; said transmitter comprises a decimator and is operable to generate said first-mode OFDM symbol via a decimation performed by said decimator; said decimation introduces an amount of aliasing such that the ratio of P1 to P2 is equal to or less than a threshold signal-to-noise ratio of a receiver to which said OFDM subcarriers are transmitted; P 1 is total signal power of C′ virtual subcarrier values prior to said decimating; and P 2 is the signal power of a portion of said C′ virtual subcarrier values residing at a frequency above a folding frequency determined by a decimation factor.