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

摘要

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.

主权项

1. A transmission method for a base station in a cell of an orthogonal frequency division multiplexing (OFDM) wireless system, the base station including a plurality of antennas and a plurality of circuits coupled to the plurality of antennas, the method comprising:
generating a first set of signals by modulating a plurality of cell-specific subcarriers in a first transmission mode for transmission to mobile devices within the cell; generating a second set of signals by modulating a plurality of user-specific subcarriers in a second transmission mode for transmission to a specific mobile device within the cell; maintaining a mapping of a plurality of circuits coupled to the plurality of antennas and associated with the first transmission mode and the second transmission mode, the mapping causing the first set of signals to be routed to a first group of the plurality of antennas in the first transmission mode and causing the second set of signals to be routed to a second group of the plurality of antennas in the second transmission mode; transmitting the first set of signals by activating a first group of the plurality of circuits reflected by the mapping; and transmitting the second set of signals by activating a second group of the plurality of circuits reflected by the mapping; wherein the first group of antennas produce a first beam pattern for the first transmission mode and the second group of antennas produce a second beam pattern for the second transmission mode, and wherein the first beam pattern is different than the second beam pattern in either an azimuth pattern or an elevation pattern.