Patent ID: 7003044
Filing Date: 2006-02-21
Classification: H04L,H04W

Abstract:
1. A method of transmitting a data bit stream on a transmission system, the transmission system having a plurality of carriers and a target bit error rate, each carrier initially having a known transmit power, comprising the steps of: a. estimating a signal to noise ratio for each carrier for the known transmit power for each carrier; b. allocating a quantity of bits for each carrier so that a bit error rate is less than or equal to the target bit error rate for the estimated signal to noise ratio, wherein the quantity of bits is a whole number greater than or equal to zero; c. computing total excess power available for a current allocation of bits; d. computing gains required by each carrier to carry additional bits; e. allocating at least a portion of the total excess power to at least one carrier on the basis of the computed gains required by each carrier to carry additional bits; f. converting the data bit stream into a plurality of parallel bit streams based on the allocation of the total excess power; g. encoding the parallel bit streams; h. scaling the encoded parallel bit streams with a gain based on the allocation of the total excess power; and i. modulating the encoded and scaled parallel bit streams for transmission.