Method and apparatus for implementing space frequency block coding in an orthogonal frequency division multiplexing wireless communication system

摘要

The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.

主权项

1. A transmitter comprising:
a plurality of transmit antennas; and circuitry configured to generate a channel coded data stream; wherein the circuitry is further configured to perform space frequency block coding (SFBC) encoding on the channel coded data stream in an open loop mode such that the SFBC encoding is performed using a plurality of pairs of orthogonal frequency division multiplexing (OFDM) sub-carriers, wherein a first pair of OFDM sub-carriers of an OFDM symbol is mapped to a first pair of antenna ports and a second pair of OFDM sub-carriers of the OFDM symbol is mapped to a second pair of antenna ports; and wherein the circuitry is further configured to transmit the SFBC encoded data over the plurality of pairs of OFDM sub-carriers using the plurality of transmit antennas as an OFDM signal.