Patent ID: 8780838
Filing Date: 2014-07-15
Classification: H04L

Abstract:
1. A method comprising: allocating a first number of bits per symbol to a carrier tracking subcarrier of a plurality of subcarriers of an orthogonal frequency division multiplexing (OFDM) signal based on a first target performance margin; allocating numbers of bits per symbol to other subcarriers of the plurality of subcarriers based on a second target performance margin; and communicating data using the OFDM signal, the first number of bits per symbol of data modulating the carrier tracking subcarrier and the numbers of bits per symbol of data modulating the other subcarriers of the plurality of subcarriers, wherein allocating the first number of bits per symbol comprises determining a maximum number of data bits that provides the first target performance margin based on a performance estimate for the carrier tracking subcarrier, and wherein allocating numbers of bits per symbol to other subcarriers comprises determining maximum numbers of data bits that provide the second target performance margin based on corresponding performance estimates for the other subcarriers.