Wireless transmitting and receiving device and method

A wireless device, method, and signal for use in communication of a wireless packet between transmitting device and a wireless receiving device via a plurality of antennas (txl to Tx4), wherein a signal generator generates wireless packet including a short-preamble sequence (101) used for a first automatic gain control (AGC), a first long-preamble sequence (102), a signal field (103 and 104) used for conveying a length of the wireless packet, an AGC preamble sequence (105A to 105D) used for a second AGC to be performed after the first AGC, a second long-preamble sequence (106A to 109A, 106B to 109B, 106C to 109C and 106D to 109D), and a data field conveying data (110A to 110D). The AGC preamble sequence (105A to 105D) is transmitted in parallel by the plurality of antennas (Tx1 to Tx4).