operations such as negation and conjugation the diversity created by the 5 transmitter utilizes space diversity and either time or frequency diversity space diversity is effected by redundantly transmitting over a plurality of antennas time diversity is effected by redundantly transmitting at different times and frequency diversity is effected by redundantly transmitting at different frequencies illustratively using two transmit antennas and a single receive antenna one of the disclosed embodiments provides the to same diversity gain as the maximal ratio receiver combining scheme with one transmit antenna and two receive antennas the principles of this invention are applicable to arrangements with more than two antennas and an illustrative embodiment is disclosed using the same space block code with two transmit and two receive antennas application_number US 82879007 A description in accordance with the principles of this invention effective communication is achieved with encoding of symbols that comprises merely negations and conjugations of symbols which really is merely negation of the imaginary part in combination with a transmitter created diversity space diversity and either frequency diversity or time diversity are employed fig1 presents a block diagram 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 illustratively comprises antennas 11 and 12 and it handles incoming data in blocks 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.