Patent ID: 6345377
Filing Date: 2002-02-05
Classification: H03M,H04H,H04L

Abstract:
A broadcasting method comprising the steps of:encoding program material using codes including a first set of bits and a second set of bits, said first set of bits contributing a greater coding gain to said codes than said second set of bits; modulating a plurality of orthogonal frequency division multiplexed carrier signals with said codes, whereby said first set of bits are carried by a first group of said carrier signals and said second set of bits are carried by a second group of carrier signals, said first group of carrier signals being less susceptible to interference than said second group of carrier signals; broadcasting said carrier signals; receiving said carrier signals; estimating the interference to which the carrier signals in said second group of carrier signals have been subjected to determine if carrier signals in said second group have been corrupted; erasing bits carried by any of said carrier signals which have been determined to be corrupted; and decoding bits of said codes that have not been erased.