Channel sounding in OFDMA system
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United States of America Patent
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Apr 12, 2011
Grant Date -
Apr 24, 2008
app pub date -
Sep 29, 2005
filing date -
Sep 30, 2004
priority date (Note) -
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Abstract
Method and apparatus for determining a downlink channel response in an orthogonal frequency division multiplexing access (OFDMA) system. The method and apparatus uses the uplink quality indication channel for determining the downlink channel response, or uses round trip pilot relay channel sounding. The uplink quality indication channel may comprise modified mini-tiles. The subscriber station using round trip pilot relay channel sounding sends composite transponder pilots after receiving the DL pilots.
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