Patent ID: 8781006

Claim:
A method for transmitting information in a multi-carrier system, the method comprising: identifying a first set of carriers and a second set of carriers, the first set of carriers associated with a first code rate on an average over the first set of carriers, and the second set of carriers associated with a second code rate on an average over the second set of carriers, the second code rate different from the first code rate; partitioning a first sequence of forward error correction (FEC) encoded bits representing a single orthogonal frequency division multiplexing (OFDM) symbol into groups of bits including a first group of bits and at least a second group of bits, wherein the first group of bits includes a first quantity of information bits based, at least in part, on a first total of FEC encoded bits associated with carriers of the first set of carriers and the first code rate, and wherein the second group of bits includes a second quantity of information bits based, at least in part, on a second total of FEC encoded bits associated with carriers of the second set of carriers and the second code rate; interleaving a subset of bits from the first group of bits to map multiple bits from the first group of bits to respective carriers in the first set of carriers in accordance with the first code rate; interleaving a subset of bits from the second group of bits to map multiple bits from the second group of bits to respective carriers in the second set of carriers in accordance with the second code rate; and transmitting the single OFDM symbol, wherein the single OFDM symbol includes one or more carrier signals in the first set of carriers modulated using the mapped bits from the first group of bits associated with the first code rate, and wherein the single OFDM symbol includes one or more carrier signals in the second set of carriers modulated using the mapped bits from the second group of bits associated with the second code rate.