Error detection decoder and error correction for digital radio communications

摘要

The decoder uses a Viterbi decoding of the digital input signal, and adds (2) a flag signal at a first location in the signal where the difference between the metric value of the path in the Viterbi decoding algorithm is less than a threshold value. Flag signals are continuously added at locations preceding this first location, determined by a reverse tracking process. A decoder (5) uses a block code to decode the signal that has been decoded by the Viterbi decoder, treating the locations marked with a flag as signal erasure locations. The digital input signal has several bits forming a symbol, and the decoder applies a Reed-Solomon decoding using this symbol.