Distributing subcarriers between multiple antennas of a multiple antenna wireless transmission system to optimise performance.

摘要

The invention provides a method and device for managing the use of antennas in a multiple antenna wireless transmission system for OFDM signals. The method includes defining a utility function which comprises a performance metric for transmission. Combinations of antenna and OFDM subcarriers are selected to optimise the utility function under two constraints. The first constraint is that the combinations of antenna and subcarrier include only one antenna for each subcarrier, the second constraint is that the combinations include the same number of subcarriers for each antenna. The performance metric may comprise channel gain, signal to noise ratio, channel capacity or bit error rate. The optimisation may include an integer optimisation, a branch and bound optimisation, a linear relaxation, a linear programming method or a simplex method.