%0 Journal Article
%T Diversidad en transmisi¨®n con selecci¨®n escalonada de c¨®digo espacio temporal
%A Mavares T
%A Dimas
%A Torres
%A Rafael P
%A Torres
%A V¨ªctor L
%J Universidad, Ciencia y Tecnolog¨ªa
%D 2009
%I Scientific Electronic Library Online
%X in this paper, an adaptive transmision technique for multiple transmitter antennas systems is proposed. the proposed technique, refered as space-time step selection, uses predetermined time intervals to transmit with different numbers of antennas, using space-time codes when more than one transmitter antenna is selected. the time intervals using for transmission are found offline through simulations, as a function of the maximum doppler frequency. simulation results show that the proposed technique achieves a gain of around 2db w.r.t. one single antenna selection system, and around 1db w.r.t. a two antennas selection system using alamouti coding. computation complexity is limited to a channel ranking at the receiver and feedback information requeriments are very low.
%K antenna selection
%K transmission diversity
%K adaptive transmission
%K space-time coding.
%U http://www.scielo.org.ve/scielo.php?script=sci_abstract&pid=S1316-48212009000200012&lng=en&nrm=iso&tlng=en