Invention Grant
- Patent Title: Multi-rank beamforming precoding apparatus and method
- Patent Title (中): 多级波束成形预编码装置及方法
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Application No.: US12026120Application Date: 2008-02-05
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Publication No.: US07949318B2Publication Date: 2011-05-24
- Inventor: Narayan Prasad , Mohammad Ali Khojastepour , Mohammad Madihian , Xiaodong Wang
- Applicant: Narayan Prasad , Mohammad Ali Khojastepour , Mohammad Madihian , Xiaodong Wang
- Applicant Address: US NJ Princeton
- Assignee: NEC Laboratories America, Inc.
- Current Assignee: NEC Laboratories America, Inc.
- Current Assignee Address: US NJ Princeton
- Agent Jeffery Brosemer; Joseph Kolodka
- Main IPC: H04B1/04
- IPC: H04B1/04

Abstract:
A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.
Public/Granted literature
- US20080188190A1 MULTI-RANK BEAMFORMING PRECODING APPARATUS AND METHOD Public/Granted day:2008-08-07
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