A wireless communication device for performing communication with a number of communication counterpart devices by multiuser-MIMO transmission, the wireless communication device comprising: an individual control signal generation section which is configured, for a first communication counterpart device of said communication counterpart devices, to generate individual control information including a pilot stream index, PSI, for said first communication counterpart device, a number of streams Mt in the multiuser-MIMO transmission being equal to the number of said communication counterpart devices, and an indication of a combination of modulation schemes of second communication counterpart devices, said second communication counterpart devices being said number of said communication counterpart devices besides the first communication counterpart device; and a transmission section which is configured to transmit the generated individual control information to the first communication counterpart device, wherein the individual control signal generation section is further configured to allocate pilot stream indexes of the number of communication counterpart devices in ascending or descending order of a modulation multi-level number of the modulation schemes of the communication counterpart devices, each pilot stream index being a number equal to or smaller than the number of streams, and wherein for said first communication counterpart device, said combination of modulation schemes of said second communication counterpart devices is indicated by arranging these schemes in ascending or descending order of a modulation multi-level number and using an index of the arrangement as said indication of said combination, the said index being represented by bits and for said first communication counterpart device, said arrangement of the modulation schemes of said second communication counterpart devices belongs to a set of possible different arrangements formed by varying each of Mt-1 modulation schemes to take each of a number of values L of modulation multi-level number and ordering the Mt-1 schemes according to the modulation multi-level number. an individual control signal generation section which is configured, for a first communication counterpart device of said communication counterpart devices, to generate individual control information including a pilot stream index, PSI, for said first communication counterpart device, a number of streams Mt in the multiuser-MIMO transmission being equal to the number of said communication counterpart devices, and an indication of a combination of modulation schemes of second communication counterpart devices, said second communication counterpart devices being said number of said communication counterpart devices besides the first communication counterpart device; and a transmission section which is configured to transmit the generated individual control information to the first communication counterpart device, wherein the individual control signal generation section is further configured to allocate pilot stream indexes of the number of communication counterpart devices in ascending or descending order of a modulation multi-level number of the modulation schemes of the communication counterpart devices, each pilot stream index being a number equal to or smaller than the number of streams, and wherein for said first communication counterpart device, said combination of modulation schemes of said second communication counterpart devices is indicated by arranging these schemes in ascending or descending order of a modulation multi-level number and using an index of the arrangement as said indication of said combination, the said index being represented by bits and for said first communication counterpart device, said arrangement of the modulation schemes of said second communication counterpart devices belongs to a set of possible different arrangements formed by varying each of Mt-1 modulation schemes to take each of a number of values L of modulation multi-level number and ordering the Mt-1 schemes according to the modulation multi-level number.