of an arrangement where the two controllable aspects of the transmitter that are used are space and time that is the fig1 arrangement includes multiple transmitter antennas providing space diversity and employs multiple time intervals specifically transmitter 10 illustratively comprises antennas 11 and 12 and it handles incoming data in blocks of n symbols where n is the number of transmitter antennas and in the illustrative embodiment of fig1 it equals 2 and each block takes n symbol intervals to transmit also illustratively the fig1 arrangement includes a receiver 20 that comprises a single antenna 21 at any given time a signal sent by a transmitter antenna experiences interference effects of the traversed channel which consists of the transmit chain the air link and the receive chain the channel may be modeled by a complex multiplicative distortion factor composed of a magnitude response and a phase response in the exposition that follows therefore the channel transfer function from transmit antenna 11 to receive antenna 21 is denoted by h 0 and from transmit antenna 12 to receive antenna 21 is denoted by h 1 where noise from interference and other sources is added at the two received signals and therefore the resulting baseband signal received at any time and outputted by reception and amplification section 25 is r t u03b1 0 e j u03b8 0 s i u03b1 1 e j u03b8 1 s j n t 2 where s i and s j are the signals being sent by transmit antenna 11 and 12 respectively as indicated above in the two antenna embodiment of fig1 each block comprises two symbols and it.