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Cyclic delay diversity for mitigating intersymbol interference in OFDM systems
Ericsson Research, Isafjordsgatan 14E, 164 93 Kista, Sweden.
2000 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

NOVELTY - The method involves splitting a signal along several antenna paths. The signal includes a number of positions, each of the positions includes a sample. The signal is received in an antenna path. The samples of the signal are shifted a predetermined number of positions. Samples shifted beyond the number of positions in the signal are shifted into a number of positions at a beginning or end of the signal. A number of samples from an end of the signal are included in a guard interval. The signal and the guard interval are transmitted. USE - For transmission diversity. ADVANTAGE - Mitigates intersymbol interference in systems which employ delay transmit diversity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for an apparatus for transmitting signals and for a radio transmission system. DESCRIPTION OF DRAWING(S) - The figure shows a transmitter and receiver which operate according to a OFDM transmission scheme using transmission diversity.

Place, publisher, year, edition, pages
Keyword [en]
cyclic delay diversity, ofdm, diversity
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-74225ISI: 2002405009OAI: diva2:489346
US 6842487-B1 (2005-01-11)

CN 1291563-C (2006-12-20); EP 1319278-B1 (2008-02-27); CA 2421768-C (2012-06-26); JP 4988137-B2 (2012-08-01)

Available from: 2012-02-02 Created: 2012-02-02 Last updated: 2013-08-07Bibliographically approved

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Larsson, Peter
Communication Systems

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