A method comprising: mapping a signal desired by at least one receiver to a projection area based at least on a functionality corresponding to one or more first radio frequency chains coupled to a plurality of first antennas (215-1, 215-2, 215-3, 215-4); selecting precoding coefficients for at least one of one or more second radio frequency chains coupled to a plurality of second antennas (205-1 - 205-30) to generate a signal point within the projection area; and compensating for a difference between the generated signal point and the signal desired by the at least one receiver using at least one of the first radio frequency chains, said projection area denoting an area within which the difference between the generated signal point and the signal desired by the at least one receiver is compensable using the one or more first radio frequency chains coupled to the plurality of first antennas (215-1, 215-2, 215-3, 215-4), wherein the second radio frequency chains have a reduced functionality relative to the functionality of the first radio frequency chains, and wherein the first and second set of antennas are different, wherein the functionality of the first radio frequency chains is based at least in part on a plurality of features and wherein the second radio frequency chains have a reduced functionality because one or more features for the second radio frequency chains are relaxed relative to identical one or more features for the first radio frequency chains, said features corresponding to at least one of: transmission power, amplifier character like operating region, bit resolution, and analog filters. mapping a signal desired by at least one receiver to a projection area based at least on a functionality corresponding to one or more first radio frequency chains coupled to a plurality of first antennas (215-1, 215-2, 215-3, 215-4); selecting precoding coefficients for at least one of one or more second radio frequency chains coupled to a plurality of second antennas (205-1 - 205-30) to generate a signal point within the projection area; and compensating for a difference between the generated signal point and the signal desired by the at least one receiver using at least one of the first radio frequency chains, said projection area denoting an area within which the difference between the generated signal point and the signal desired by the at least one receiver is compensable using the one or more first radio frequency chains coupled to the plurality of first antennas (215-1, 215-2, 215-3, 215-4), wherein the second radio frequency chains have a reduced functionality relative to the functionality of the first radio frequency chains, and wherein the first and second set of antennas are different, wherein the functionality of the first radio frequency chains is based at least in part on a plurality of features and wherein the second radio frequency chains have a reduced functionality because one or more features for the second radio frequency chains are relaxed relative to identical one or more features for the first radio frequency chains, said features corresponding to at least one of: transmission power, amplifier character like operating region, bit resolution, and analog filters.