FIELD: physics, computer engineering.
SUBSTANCE: invention relates to means of encoding using a reduced codebook with adaptive resetting. A codeword is selected from a codebook in feedback MIMO channel conditions. To reduce signalling, codewords are organised into codeword subsets. A receiver signals an index of a codeword into a current codeword subset previously made known to the transmitter. The current codeword subset is adaptively selected based on a threshold criterion. For example, if the best codeword from the current codeword subset is not sufficiently similar to the best codeword in the full codebook, a switch is made in the codeword subset.
EFFECT: reducing the amount of information transmitted from the receiving side to the transmitting side.
20 cl, 22 dwg
