Channel estimation apparatus and method for adaptive channel allocation in an orthogonal frequency division multiple access system
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United States of America Patent
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Apr 8, 2008
Grant Date -
May 26, 2005
app pub date -
Nov 26, 2004
filing date -
Nov 26, 2003
priority date (Note) -
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Abstract
A method and apparatus for defining at least one subcarrier as a subchannel, dividing a total frequency band into a plurality of subchannels, and allocating the subchannels to at least one mobile station in an OFDMA mobile communication system. The method includes receiving channel state information; comparing the received channel state information with a predetermined threshold, calculating an average occurrence length of a case in which the received channel state information is greater than the threshold, calculating a state hold prediction value, calculating an estimation value, sorting the calculated estimation values according to subchannels in order of their levels, and allocating subchannels according to the at least one mobile station in the sorted order.
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