Soft-output demapper and Viterbi decoder for software-defined radio

Marcin Darmetko

doi:10.1117/12.2076064

2 December 2014 Soft-output demapper and Viterbi decoder for software-defined radio

Marcin Darmetko

Proceedings Volume 9290, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2014; 92903E (2014) https://doi.org/10.1117/12.2076064
Event: Symposium on Photonics Applications in Astronomy, Communications, Industry and High-Energy Physics Experiments, 2014, Warsaw, Poland

Abstract

Viterbi algorithm is commonly used in communication systems to decode convolutional codes. Soft decision demapping can be used to further improve Viterbi decoder performance. This paper presents implementation of soft-decision demapping and Viterbi decoder for software-defined radio (SDR). Fast simplified algorithms for soft demapping of four modulations common in satellite communications systems (BPSK, QPSK, 8-PSKand 16-APSK) were implemented. To increase software processing speed SIMD (single instruction multiple data) instructions were used.

Citation Download Citation

Marcin Darmetko "Soft-output demapper and Viterbi decoder for software-defined radio", Proc. SPIE 9290, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2014, 92903E (2 December 2014); https://doi.org/10.1117/12.2076064

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