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Method for determining transmit weights
Ericsson Research, Isafjordsgatan 14E, 164 93 Kista, Sweden.
2003 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

NOVELTY - The transmission weights associated to pilot sequences (p1-p_N) containing symbols with predetermined time, frequency resource and complex transmission weights (W11-W_N_M) are adapted for optimizing the multicast transmission of pilot signal. The multiple information stream are transmitted using adapted transmission weights. USE - For beam-forming data transmission in multi-carrier multi-user communication system such as orthogonal frequency division multiplexing (OFDM) system. ADVANTAGE - Improves downlink channel quality by using feedback information from mobile terminals in response to the received pilot signals, thereby increasing transmission efficiency. DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram of the communication system. communication system (10) access point (11) pilot sequences (p1-p_N) mobile terminals (MS1-MS4) complex transmission weights (W11-W_N_M)

Place, publisher, year, edition, pages
Keyword [en]
pilot signals, beamforming
National Category
Signal Processing Communication Systems
URN: urn:nbn:se:kth:diva-74295ISI: 2005497769OAI: diva2:489406
US 7406336-B2 (2008-07-29)

CN 1886915-B (2010-06-09); JP4435737-B2 (2010-03-24); EP 1700397-B1 (2010-12-08)

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

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Larsson, Peter
Signal ProcessingCommunication Systems

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