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An Improved PSK Scheme for Fading Channels
KTH, Superseded Departments, Signals, Sensors and Systems.ORCID iD: 0000-0001-9697-9978
1996 (English)In: Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity, IEEE , 1996, 1276-1280 p.Conference paper (Refereed)
Abstract [en]

The performance of uncoded PSK schemes over fading channels is only inversely proportional to the signal-to-noise ratio, which is not very reliable for digital communication applications. Improving their performance has been approached by means of coded modulation schemes where code redundancy combined with interleaving introduces some degree of diversity that depends on the complexity of the code. This paper proposes an alternative method of improving the performance of PSK schemes over fading channels by looking at the reference scheme first. It is shown that by using interleaving combined with a proper signal constellations and still using symbol-by-symbol detection, a higher diversity is obtained and the performance of uncoded PSK schemes over fading channels is considerably improved. With this simple modification, the obtained performance is comparable to that of the best 4-state trellis coded modulation (TCM) 8PSK schemes reported in the literature. By optimizing the reference scheme first, it is shown that this technique optimizes the performance of Ungerboeck's trellis coded 8PSK schemes over fading channels. Infact, without altering their performance over the additive white Gaussian noise channel, significant coding gain over fading channels is achieved.

Place, publisher, year, edition, pages
IEEE , 1996. 1276-1280 p.
National Category
Computer and Information Science
Research subject
URN: urn:nbn:se:kth:diva-28552DOI: 10.1109/GLOCOM.1996.587650ISBN: 0-7803-3336-5OAI: diva2:387977
QC 20110117Available from: 2011-01-16 Created: 2011-01-16 Last updated: 2011-11-29Bibliographically approved

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ReferencesLink to record
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