PRE-CODING FOR FREQUENCY SELECTIVE RADIO COMMUNICATION CHANNELS

摘要

The present invention relates to a method for processing signals to be transmitted in a MIMO system (10; 28) from a transmitter A, B; C having at least two transmitting antennas (11-12, 13-14; 29-31) to a receiver A, B; D having at least two receiving antennas (11- 12, 13-14; 32-34) on a frequency selective communication channel. The method comprises estimating elements of a channel matrix H(Q-1) based on time delays and complex valued coefficients associated with the communication channel to provide an estimated frequency variation function of each element of the channel matrix, and pre-coding the signals to be transmitted based on the estimated frequency variation function for each element. The invention also relates to a MIMO system; and a transmitter and a receiver for use in a MIMO system.