Patent ID: 7643574

Claim:
A transmitting apparatus in a transmit diversity system, comprising: antennas which are N+M in number where N is an integer equal to or greater than two and M is an integer equal to or greater than one; a switch which forwards N-ary block-coded symbols to N-ary first antennas of the N+M antennas; and a switch controller which controls a switching operation of the switch to forward the N-ary block-coded symbols to the N-ary first antennas, respectively, among the N+M antennas, and when a reception state is determined to be poor, the switch controller controls the switching operation of the switch to forward the N-ary block-coded symbols to N-ary second antennas which include at least one antenna different from the N-ary first antennas, wherein the switch controller controls the switching operation of the switch to forward the N-ary block-coded symbols to arbitrary N-ary first antennas respectively among the N+M antennas, and wherein the switch controller, when a receiving end which receives the N-ary block-coded symbols informs the switch controller that the reception state is poor, controls the switching operation of the switch to forward the N-ary block-coded symbols, respectively to arbitrary N-ary second antennas which include at least one antenna different from the arbitrary N-ary first antennas.