Citation
Abstract
Decoding results are described for long decoding runs of Galileo’s convolutional codes. A I-kbit/sec hardware Viterbi decoder is used for the (15, 1/4) convolutional code, and a software Viterbi decoder is used for the (7, 1/2) convolutional code. The output data of these long runs are stored in data files using a novel data compression format which can reduce file size by a factor of 100 to I typically. These data files can be used to replicate the long, time-consuming runs exactly and are useful to anyone who wants to analyze the burst statistics of the Viterbi decoders. The I-kbit/sec hardware Viterbi decoder has been developed in order to demonstrate the correctness of certain algorithmic concepts for decoding Galileo’s experimental (15, 1/4) code, and for long-constraint-length codes in general. The hardware decoder can be used both to search for good codes and to measure accurately the performance of known codes.
Details
- Volume
- 42-95
- Published
- November 15, 1988
- Pages
- 143–147
- File Size
- 176.3 KB