System and method for optimizing use of channel state information
AssigneeCavium, Inc.
InventorsGwenael Poitau, Jonathan Labs
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Abstract
The present invention relates to a combiner, channel identifier, Orthogonal Frequency Division Multiplexing (OFDM) receiver and method for optimizing use of channel state information of a received signal. The method comprises analyzing a received signal in a time domain and extracting from the received signal characteristics of a communication channel. The method furthermore comprises determining a dynamic indicator of channel station information accuracy based on the characteristics of the received signal. Additionally, the method comprises applying a weight to the channel state information according to the dynamic indicator.
Claims12
A method for optimizing use of channel state information, the method comprising the steps of:
- analyzing a received signal in the time domain;
- extracting from the received signal characteristics of a communication channel;
- determining a dynamic indicator based on the characteristics, wherein determining includes adjusting the dynamic indicator according to a combination of a number of residual peaks and amplitudes of the residual peaks;
- and
- applying the dynamic indicator to the channel state information.
A channel state information combiner comprising:
- an input for receiving an indicator of channel information accuracy estimated from a time domain signal;
- an input for receiving demapped data;
- an input for receiving channel state information;
- and
- a combining module for dynamically combining the demapped data and the channel state information in accordance with the indicator, wherein the indicator is set to provide greater consideration toward the channel state information rather than the demapped data when the received signal is significantly affected by multipath interference as estimated from the time domain signal.
A channel identifier for estimating an indicator of channel state information accuracy comprising:
- an input for dynamically receiving a time domain signal;
- and
- an estimation module for estimating the indicator based on the time domain signal, wherein the estimation module establishes the indicator according to the number of residual peaks in the time domain signal.
An Orthogonal Frequency Division Multiplexing (OFDM) receiver adapted for optimizing use of channel state information comprising:
- a channel identifier for estimating an indicator of channel state information accuracy based on dynamically received time domain signal;
- and
- a channel state information combiner having an input for receiving the indicator, demapped data and channel state information and for combining the channel state information and the demapped data according to the indicator, wherein the indicator is set to provide greater consideration toward the channel state information rather than the demapped data when the received time domain signal is significantly affected by multipath interference.
Dependencies are inferred from the claim text.