Patent ID: 6373859
Filing Date: 2002-04-16
Classification: H04J,H04L

Abstract:
A method of encoding data words for transmission using multi-carrier frequency division multiplexing comprising:selecting a set of one or more cosets of a linear sub-code of a code having a generator matrix as follows: &AutoLeftMatch;((2.0+1)Ã—2m)/2m((2.1+1)Ã—2m)/2m&ctdot;((2.0+1)Ã—2m-1)/2m-1((2.1+1)Ã—2m-1)/2m-1&ctdot;â€ƒâ€ƒ&ctdot;((2.0+1)Ã—2y)/2y((2.1+1)Ã—2y)/2y&ctdot;â€ƒâ€ƒ&ctdot;((2.0+1)Ã—21)/21((2.1+1)Ã—21)/21&ctdot;((2.0+1)Ã—20)/20((2.1+1)Ã—20)/20&ctdot;&it;((2.&it;z+1)Ã—2m)/2m&ctdot;((2.&it;(2m-1)+1)Ã—2m)/2m((2.&it;z+1)Ã—2m-1)/2m-1&ctdot;((2.&it;(2m-1)+1)Ã—2m-1)/2m-1â€ƒâ€ƒâ€ƒ((2.&it;z+1)Ã—2y)/2y&ctdot;((2.&it;(2m-1)+1)Ã—2y)/2yâ€ƒâ€ƒâ€ƒ((2.&it;z+1)Ã—21)/21&ctdot;((2.&it;(2m-1)+1)Ã—21)/21((2.&it;z+1)Ã—20)/20&ctdot;((2.&it;(2m-1)+1)Ã—20)/20where z has integer values from 0 to 2mâˆ’1, y has integer values from m to 0, x indicates bitwise multiplication of factors expressed as (m+1)-bit binary numbers, and the result of division is expressed as a single digit; and encoding the data words as 2m-symbol code words in accordance with their value and code words selected in complete cosets from the set of one or more cosets to achieve a desired peak-to-mean envelope power ratio characteristic of the transmission.