Abstract
Turbo-codes are by now well-known as a computationally-feasible coding scheme able to attain capacities very close to the Shannon bound for the scalar (single-input, single-output) channel. Recently it has been shown that much greater capacities are possible on wireless MIMO (multiple-input, multiple-output) channels, attained by means of space-time codes. The proposed paper will review the application of turbo-codes to these channels, proposing an encoding scheme, together with criteria for optimum performance and decoding techniques based on the iterative decoding algorithm used conventionally for turbo-codes. Performance competitive with other published schemes is attained.
Zusammenfassung
Turbo-Codes bieten die Möglichkeit, Übertragungskanäle mit vertretbarem Aufwand fast bis zur theoretischen Grenze der Shannon’schen Kanalkapazität auszunützen. In letzter Zeit wurde gezeigt, dass die Kanalkapazität von Funkkanälen durch Verwendung von mehreren Antennen-Elementen beim Sender und beim Empfänger im Vergleich zu Übertragungssystemen mit nur einer Antenne an jedem Ende der Übertragungsstrecke wesentlich erhöht werden kann. In diesem Beitrag wird ein neues Verfahren vorgeschlagen, wie Turbo-Codes sehr effizient in solchen Mehr-Antennensystemen eingesetzt werden können und welche Ergebnisse dabei erzielt werden.
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Burr, A.G., Yi, Y. Space-time turbo-codes: code design and decoding. Elektrotech. Inftech. 119, 381–385 (2002). https://doi.org/10.1007/BF03160508
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DOI: https://doi.org/10.1007/BF03160508
Keywords
- Turbo-codes
- iterative decoding
- interference cancellation
- space-time codes
- multiple-input/multiple output systems (MIMO)
- fading
- channel capacity
- multiple antenna systems