Patent ID: 7110467
Filing Date: 2006-09-19
Classification: H04L

Abstract:
1. A method of determining an optimum bit load per subehannel in a multicarrier system with forward error correction, comprising: computing one or more values of a number of bit positions b of a quadrature- amplitude-modulation symbol, based on one or more values of a number of symbols in an information field K, and one or more values of a number of control code symbols per discrete-multi-tone symbol z, to provide one or more determined values of b, in accordance with the following relationship: s represents a number of discrete-multi-tone symbols in a frame, ε s represents a symbol error rate, α represents the size of a code symbol, ρ represents a framing mode index, ω(b) represents an average fraction of erroneous bits in an erroneous b-sized quadrature-amplitude-modulation symbol, γ eff represents an effective signal-to-noise ratio, and n eff represents an effective number of subchannels; and selecting the value of K and the value of z which provides a maximum number of bit positions based on the one or more determined values of b.