The idea of linear space-time coding devised for multiple-antenna system is applied to communication over wireless cooperative network.A two-stage protocol is used in the network communications,where in one stage the transmitter transmits information and in the other,the cooperative partners process their received signals linearly and then transmit the code signals to the receiver.The pair error probability is analysised and get a chernoff upper bound.It is further shown that for a fixed total transmit powe...