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Method and Arrangement for Improved Relaying
Ericsson Research, Isafjordsgatan 14E, 164 93 Kista, Sweden.
2005 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

NOVELTY - An orthogonal frequency division multiplexing (OFDM) symbol is formed and a signal comprising the OFDM symbol is transmitted to a relay node (20) and directly to a receiving node (30). The transmitted symbol is received, amplified and transmitted by the relay node with latency smaller than OFDM symbol duration, to the receiving node as relay signal in same frequency band. The superimposition of the direct and relay signal are concurrently received to enable constructive interference of OFDM symbol and the OFDM symbol free from inter symbol interference is provided. USE - For wireless communication relay system (claimed) such as cellular system, etc. ADVANTAGE - The quality of the signal is enhanced by the receiver by combining the direct and relayed signal and hence the overall communication performance is improved. A predictable and reliable constructive interference is provided between the direct and relayed signals in the receiving node. The signal to noise ratio (SNR) is enhanced and higher data rates are supported. 100% data rate increase is obtained. Different cooperative relaying (CR) schemes relying on the constructive interference, can be used. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a wireless communication relay system. Transmitting node (10) Relay node (20) Receiving node (30)

Place, publisher, year, edition, pages
Keyword [en]
relaying, repeater, OFDM
National Category
Communication Systems Telecommunications
URN: urn:nbn:se:kth:diva-74269ISI: 2007638883OAI: diva2:490096
US 8050311-B2 (2011-11-01)

CN 101322329 B (2011-10-12)

Available from: 2012-02-03 Created: 2012-02-02 Last updated: 2013-08-06Bibliographically approved

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Larsson, Peter
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