Soft-decision metrics for coded orthogonal signaling in symmetric alpha-stable noise
2008 (English)In: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 56, no 1, 266-273 p.Article in journal (Refereed) Published
This paper derives new soft-decision metrics for coded orthogonal signaling in impulsive noise, more specifically symmetric alpha-stable noise. For the case of a known channel amplitude and known noise dispersion, exact metrics are derived both for Cauchy and Gaussian noise. For the case that the channel amplitude or the dispersion is unknown, approximate metrics are obtained in closed-form based on a generalized-likelihood ratio approach. The performance of the new metrics is compared numerically for a turbo-coded system, and the sensitivity to side information of the optimum receiver for Cauchy noise is considered. The gain that can be achieved by using a properly chosen decoding metric-is quantified, and it is shown that this gain is significant. The application of the results to frequency hopping ad hoc networks is also discussed.
Place, publisher, year, edition, pages
2008. Vol. 56, no 1, 266-273 p.
Cauchy, generalized likelihood ration, impulsive noise, stable distribution
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-38404DOI: 10.1109/TSP.2007.906775ISI: 000251947200022ScopusID: 2-s2.0-37749021878OAI: oai:DiVA.org:kth-38404DiVA: diva2:437923
30th IEEE International Conference on Acoustics, Speech, and Signal Processing Location: Philadelphia, PA Date: MAR 19-23, 2005 2011-08-312011-08-252011-08-31Bibliographically approved