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Multiple-antenna system for cell-specific and user-specific transmission

  • US 10,149,173 B2
  • Filed: 05/16/2016
  • Issued: 12/04/2018
  • Est. Priority Date: 11/14/2005
  • Status: Active Grant
First Claim
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1. A transmission method for a base station in a cell of an orthogonal frequency division multiplexing (OFDM) wireless system, the method comprising:

  • selecting a plurality of cell-specific OFDM subcarriers in a time slot for transmission to mobile devices within the cell, wherein a first weight is applied to a cell-specific OFDM subcarrier;

    selecting a plurality of user-specific OFDM subcarriers in the time slot for transmission to a specific mobile device within the cell, wherein a second weight is applied to a user-specific OFDM subcarrier;

    transmitting control information on the plurality of cell-specific OFDM subcarriers through a first group of antennas; and

    transmitting user-specific data on the plurality of user-specific OFDM subcarriers through a second group antennas;

    wherein the first group of antennas produce a first beam pattern having a first azimuth pattern and first elevation pattern, and the second group of antennas produce a second beam pattern having a second azimuth pattern and second elevation pattern, and wherein the first beam pattern is different than the second beam pattern in either azimuth pattern or an elevation pattern.

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