Method and apparatus for implementing space time processing with unequal modulation and coding schemes

摘要

A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.

主权项

1. A method for transmitting multiple data streams, the method comprising:
generating a first spatial stream and a second spatial stream; performing space time block coding (STBC) processing on the first spatial stream to generate at least two STBC processed space-time streams; performing cyclic delay diversity (CDD) processing on each of the STBC processed space-time streams; performing CDD processing on the second spatial stream to generate space-time stream, wherein the space-time stream is not STBC processed; and transmitting each of the STBC processed space-time streams and the space-time stream via a plurality of transmit antennas.