Method for Transmitting an Information Sequence
AssigneeNEC Laboratories America, Inc.
InventorMohammad A. Khojastepour
Life of this patent
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Abstract
Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.
Claims12
A communications method implemented in a base station used for a multiple input multiple output (MIMO) wireless system configured to have a plurality of layers, comprising:
- encoding each of multiple codewords over one or more of the plurality of layers:
- and
- transmitting the plurality of layers to a user equipment.
A communications method implemented in a user equipment used for a multiple input multiple output (MIMO) wireless system configured to have a plurality of layers, comprising:
- receiving the plurality of layers from abase station,
- wherein each of multiple codewords is encoded over one or more of the plurality of layers in case of multiple codeword transmission.
Dependencies are inferred from the claim text.