Multiple-antenna system for cell-specific and user-specific transmission
First Claim
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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Accused Products
Abstract
A reception method and apparatus for use in a multi-cell orthogonal frequency division multiple access (OFDMA) wireless system. In a unicast receive mode during a first receive time period, a first group of orthogonal frequency division multiplexing (OFDM) symbols is received by a mobile device from multiple of a plurality of antennas at a serving base station. In a single-frequency-network (SFN) receive mode during a second receive time period, a second group of OFDM symbols is received by the mobile device from one of a plurality of antennas at the serving base station. The transition between the first receive time period and the second receive time period occurs during a cyclic prefix or a cyclic postfix between OFDM symbols, and the plurality of antennas produce a first beam pattern during the unicast receive mode and a second beam pattern during the SFN receive mode.
5 Citations
11 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A base station in a cell of an orthogonal frequency division multiplexing (OFDM) wireless system, the base station comprising:
- a controller configured to;
select 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; and select 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; and a transmitter configured to; transmit control information on the plurality of cell-specific OFDM subcarriers through a first group of antennas; and transmit 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 an azimuth pattern or an elevation pattern. - View Dependent Claims (8, 9, 10, 11)
- a controller configured to;
Specification