K multipliers, each responsive to a symbol to be transmitted and to a distinct weighting factor ??i forming a vector v; and K transmitting antenna, where transmitting antenna i is coupled to multiplier i of said K multipliers; where K is an integer greater than one, the weighting factor vector, v, is proportional to v=(gH)H, H is a matrix of channel transfer coefficients hpq, p=1,2, . . .