Spatial mapping of an OFDM signal to reduce attenuation from an individual transmit antenna in a MIMO transmitter

摘要

A method is provided for transmitting a digital signal. The method includes generating a plurality of spatial streams from a digital signal and transforming the spatial streams into a plurality of space-time streams. Each of the space-time streams are cycled in the frequency domain among each of a plurality of transmit antennas. The space-time streams are wirelessly transmitted from the plurality of transmit antennas.

主权项

1. A method of transmitting a digital signal, comprising:
generating a plurality of spatial streams from a digital signal; transforming the spatial streams into a plurality of space-time streams; cycling in a frequency domain each of the space-time streams among each of a plurality of transmit antennas, including a first antenna and a second antenna, so each space-time stream is successively transmitted by each of the transmit antennas, wherein at least two spatial mapping matrices are selected for the cycling, including a first matrix for use with a first subcarrier and a second matrix, which is different from the first matrix, for use with a second subcarrier, the first matrix mapping each space-time stream entirely to the first antenna, and the second matrix mapping each space-time stream entirely to the second antenna; and wirelessly transmitting each of the space-time streams from each of the plurality of transmit antennas.