Patent ID: 8009755

Claim:
A method for digital wireless message transmission over a broadband mobile radio channel with a frequency/time band having a first number of subcarriers and a second number of symbols by using orthogonal frequency division multiplexing multicarrier modulation in a multiple input, multiple output, multiple antenna method using a third number of transmitting antennas and a fourth number of receiving antennas, said method comprising: multiple input, multiple output signal processing carried out jointly over a fifth number of subcarriers; using, for all subcarriers and symbols, a single predetermined channel-matched transmission strategy, described by a maximum number of complex values at a signaling end, independently of specifics of the multiple input, multiple output, multiple antenna method and independently of a size of the frequency/time band, where the maximum number equals the third number times the fourth number; selecting the transmission strategy to maximize transmission capacity over the frequency/time band; specifying the width of the frequency/time band over frequency in dependence on predetermined channel characteristics and for staying below a predetermined signaling effort; varying the width of the frequency/time band over the frequency in accordance with a predetermined algorithm with a preset step width; and signaling, by a receiver, back channel information from which the transmission strategy can be derived, including a fifth number of complex values per channel, where the fifth number equals a rank of a channel matrix times the third number.