Abstract
This paper discusses use of multi-threshold decoders in the Multiple Input Multiple Output systems with fading radio channels. The main attention is paid to the problems of implementation of the multi-threshold decoders and performance, with a focus on preserving low complexity, which is critically important for achieving high speed of decoding. In modern communication systems, where data communication rates reach dozens and hundreds of Gbit/sec, decoding efficiency becomes a determinant in ensuring stable and reliable information transfer. The obtained results have shown that multi-threshold decoders due to its ability to almost optimally decode even very long codes with low computational complexity ensures high efficiency in channels with different types of fading, including multipath channels with intersymbol influence, when it is used jointly with the orthogonal frequency division multiplexing. Under these conditions, many noise-resistant codes are unfit for service due to their small length, which highlights the multi-threshold decoders advantages. These results confirm the possibility of multi-threshold decoders application in modern high-speed systems of digital data communication with complex nature of errors.