Method and apparatus for pre-coding for a mimo system
OwnerGwendolyn Barriac, Jibing Wang +3inventors
InventorsGwendolyn Barriac, Jibing Wang, Alexei Gorokhov, Hemanth Sampath, Tamer Kadous
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Abstract
Systems and methodologies are described that facilitates computing a precoding index which correlates to a precoding matrix within a codebook. According to various aspects, systems and/or methods are described that facilitate computing an effective signal-to-noise ratio (SNR). Such systems and/or methods may further facilitate selecting a precoding matrix and a corresponding precoding index. Such systems and/or methods may still further facilitate employing the precoding matrix in a MIMO wireless communication system.
Claims45
A method that facilitates computing a precoding index in a wireless communication environment, comprising:
- utilizing a per-tile feedback scheme for MIMO precoding;
- computing an effective signal-to-noise ratio (SNR) for a precoding matrix and a tile;
- selecting the precoding matrix yielding the highest effective SNR;
- and
- employing the precoding matrix and corresponding precoding index in the MIMO wireless communication environment.
A method that facilitates computing a precoding index in a wireless communication environment, comprising:
- utilizing an average feedback scheme for MIMO precoding;
- computing an average effective signal-to-noise ratio (SNR) for a precoding matrix;
- obtaining an averaged channel covariance matrix;
- and
- selecting a precoding matrix from a codebook utilizing at least one of the averaged effective SNR and the averaged channel covariance matrix.
A communication apparatus, comprising:
- a memory that retains instructions related to computing a precoding index by calculating an effective SNR for at least one of a per-tile feedback scheme and an average feedback scheme;
- and
- a processor, coupled to memory, configured to evaluate the instructions to employ the precoding index utilizing at least one algorithm, the precoding index correlates to a matrix within a codebook.
A communication apparatus that facilitates computing a precoding index, comprising:
- means for computing an effective signal-to-noise ratio (SNR);
- means for selecting a precoding matrix and a corresponding precoding index;
- and
- means for employing the precoding matrix in a MIMO wireless communication system.
A machine-readable medium having stored thereon machine-executable instructions for:
- computing an effective signal-to-noise ratio (SNR);
- selecting a precoding matrix and a corresponding precoding index;
- and
- employing the precoding matrix in a MIMO wireless communication system.
In a wireless communication system, an apparatus, comprising:
- a processor configured to:
- ascertain to employ at least one of a per-tile feedback scheme and an average feedback scheme;
- select a precoding matrix and a corresponding precoding index;
- and
- employ the precoding matrix in a MIMO wireless communication system.
Dependencies are inferred from the claim text.