FIELD: radio engineering, communication.
SUBSTANCE: invention relates to a wireless communication system and a transmission rate adaptive transmission scheme for a multiple input multiple output (MIMO) communication system. In one method, at least one data symbol stream is received for transmission from a plurality of antennae. Each data symbol stream is scaled with a respective weight coefficient corresponding to the value of transmit power allocated to that stream. The scaled data symbol stream(s) are multiplied with a transmit basis matrix to provide a plurality of transmitted symbol streams for the plurality of antennae. The transmit basis matrix (e.g., a Walsh-Hadamard matrix or a discrete Fourier transform (DFT) matrix) is defined such that each data symbol stream is transmitted from all antennae and each transmitted symbol stream is transmitted at full (or close to full) power for the associated antenna.
EFFECT: transmission rate adaptive transmission scheme for a MIMO communication system is disclosed, which can transmit a variable number of data symbol streams, provides transmission diversity for each data symbol stream, and fully utilises the total transmit power of the system and the full power of each antenna.
28 cl, 4 dwg
