Patent ID: 8401105

Claim:
A method for transmitting a data signal by a transmission unit of a wireless multiple-input/multiple-output (MIMO) communication system, the transmission unit comprising a plurality of transmission antennas, the method comprising: performing a first transmission of a data signal, the first transmission comprising transmitting the data signal by each one of the plurality of transmission antennas; and performing a second transmission of the data signal at a time later than the first transmission, the second transmission comprising transmitting at least one spectrally modified signal variant of the data signal by at least one antenna of the plurality of transmission antennas, wherein transmitting at least one spectrally modified signal variant of the data signal comprises applying a convolutional coding represented by a convolutional sequence having a plurality of non-zero elements to a signal component of the data signal to spectrally modify the data signal to obtain a respective spectrally modified signal variant of the data signal.