1. A transmission method comprising:generating a first symbol group that includes a control symbol for causing a communication partner apparatus to recognize that a short-range communication is to be performed, and a second symbol group that includes a data symbol for the short-range communication;
transmitting the first symbol group at a first transmit power, wherein the first symbol group includes the control symbol and a first gain control (AGC) symbol; and
transmitting the second symbol group at a second transmit power that is smaller than the first transmit power, wherein the second symbol group includes the data symbol and a second AGC symbol.