The invention discloses a
wireless energy supply full duplex relay cooperation secret transmission method and
system, and the method comprises the steps of enabling a
relay to receive an energy signaltransmitted by an information source, and carry out the harvesting of energy; enabling the
relay to receive the information which is sent by the information source and carries the private
signal, forward the information to a legal receiving end by utilizing the harvested energy, and enabling an
eavesdropping user to receive the information; calculating a secrecy rate lower bound in an imperfect
eavesdropping channel state according to the information received by the legal receiving end and the
eavesdropping user; and constructing an
optimization problem of maximizing the secrecy rate, calculating an optimal solution of the
optimization problem by adopting an iterative convergence optimization method, and performing information secrecy transmission according to the optimal secrecy rate onthe basis that the obtained optimal secrecy rate meets the lower bound of the secrecy rate. According to the method, the secrecy rate is maximized under the condition that the
estimation error threshold value of the eavesdropping channel is known, and compared with an existing method, the method not only considers the influence of imperfect acquisition of the state information of the eavesdroppingchannel on
information security transmission, but also considers the reuse of energy-limited
relay antenna resources.