Patent ID: 7660348
Filing Date: 2010-02-09
Classification: H04L

Abstract:
1. A method for discrete multitone transmission of bits in a data stream, the data stream being divided into a plurality of frames, including: (a) applying a tone assignment permutation to a frame in the plurality of frames, wherein the tone assignment permutation defines an order for a plurality of discrete tones to be used to assign a set of bits to the frame; (b) allocating a respective number of bits to each of the plurality of discrete tones in accordance with the tone assignment permutation; (c) assigning the set of bits of the frame to the plurality of discrete tones in accordance with the tone assignment permutation such that each discrete tone is assigned the allocated respective number of bits; (d) generating for the frame a symbol comprising a plurality of discrete tones modulated to transmit the bits assigned to the respective tones; (e) repeating steps (a) through (d) for subsequent frames in the data stream wherein the tone order in the tone assignment permutation changes for each subsequent frame; and (f) transmitting the generated symbols.