초록 ▼

A broadcasting method encodes program material using convolutional codes having non-puncturable bits and puncturable bits and modulates orthogonal frequency division multiplexed carrier signals with the convolutional codes. The non-puncturable bits are carried by a first group of the carriers and th

A broadcasting method encodes program material using convolutional codes having non-puncturable bits and puncturable bits and modulates orthogonal frequency division multiplexed carrier signals with the convolutional codes. The non-puncturable bits are carried by a first group of the carriers and the puncturable bits are carried by a second group of the carriers, where the first group of carrier signals is less susceptible to interference than the second group of carrier signals. The carrier signals are then broadcast to receivers which determine if the carriers in the second group have been corrupted and erase puncturable bits carried by any of the carriers which have been determined to be corrupted. This produces punctured codes which are subsequently decoded to recover the program material.

대표청구항 ▼

[ What is claimed is:] [1.] A broadcasting method comprising the steps of:encoding program material using convolutional codes having nonpuncturable bits and puncturable bits;modulating a plurality of orthogonal frequency division multiplexed carrier signals with said convolutional codes, whereby sai

[ What is claimed is:] [1.] A broadcasting method comprising the steps of:encoding program material using convolutional codes having nonpuncturable bits and puncturable bits;modulating a plurality of orthogonal frequency division multiplexed carrier signals with said convolutional codes, whereby said non-puncturable bits are carried by a first group of said carrier signals and said puncturable 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; andbroadcasting said carrier signals.