Patent ID: 8098762

Claim:
A method for transmitting signals in a multiple-input multiple-output communication system provided with a plurality of antennas, comprising: dividing the plurality of antennas of a transmitter into a plurality of antenna groups according to locations of the plurality of antennas, wherein each of the antennas included in a same antenna group are separated apart from each other by at least a first distance and each of the antennas included in different antenna groups are separated apart from each other by at least a second distance; splitting a data stream into a plurality of sub-data streams according to a number of the plurality of antenna groups; and transmitting each of the plurality of sub-data streams with a separately generated sequence of pilot symbols to a receiver via each antenna included in the corresponding antenna group from among the plurality of antenna groups, wherein each sequence of pilot symbols transmitted via each antenna included in the corresponding antenna group has a predefined pattern that is different from another sequence of pilot symbols transmitted via another antenna from among the plurality of antennas, and wherein the plurality of sub-data streams transmitted via each antenna of the plurality of antenna groups have different phases.