Link quality determination of a transmission link in an OFDM transmission system
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United States of America Patent
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Mar 6, 2007
Grant Date -
Aug 15, 2002
app pub date -
Jul 24, 2001
filing date -
Jul 25, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a link quality determination unit (LQ-DET) for determining a link quality (LQ) of a transmission link (TL) between an OFDM transmitter (TR) and an OFDM receiver (RC) of an OFDM transmission system (SYS). A first link quality measure determination unit (Q1-DET) determines a first link quality measure (Q.sub.1) on the basis of a signal power variation or a signal-to-noise variation determined by a variation determination unit (VS-DET). A second link quality determination unit (Q2-DET) calculates a second link quality measure (Q.sub.2) on the basis of an average signal-to-noise ratio based on the noise power (P.sub.z) and the signal power (P.sub.s). To perform a link adaptation (LA) an overall link quality determination unit (Q-DET) combines the first and second link quality measures (Q.sub.1, Q.sub.2) into an overall link quality measure (Q).
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