Method and apparatus for utilizing channel state information in a wireless communication system
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United States of America Patent
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-
Feb 28, 2006
Grant Date -
Jan 2, 2003
app pub date -
Sep 18, 2001
filing date -
Mar 23, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Techniques for transmitting data from a transmitter unit to a receiver unit in a multiple-input multiple-output (MIMO) communication system. In one method, at the receiver unit, a number of signals are received via a number of receive antennas, with the received signal from each receive antenna comprising a combination of one or more signals transmitted from the transmitter unit. The received signals are processed with a spatial, a space-time, or a full-CSI technique to derive channel state information (CSI) indicative of the characteristics of a number of transmission channels used for data transmission. The CSI (which may comprise SNR estimates, data rate indicators, complex channel gains, or some other information) is transmitted back to the transmitter unit. At the transmitter unit, the CSI is received and data for transmission to the receiver unit is processed (e.g., coded and modulated) based on the received CSI.
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