Patent ID: 7583746

Claim:
A wireless transmitting device for communicating with a wireless receiving device by using a wireless packet, the wireless transmitting device comprising: a signal generator configured to generate a signal for transmitting the wireless packet, the wireless packet including: a short-preamble used for a first automatic gain control (1st AGC) at the wireless receiving device, a first long-preamble for estimating a channel impulse response between the wireless transmitting device and the wireless receiving device, a signal field following the short-preamble and the first long-preamble, and for conveying information regarding a length of the wireless packet, an AGC preamble following the signal field, and used for a second automatic gain control (2nd AGC) performed after the first automatic gain control at the wireless receiving device, a second long-preamble for estimating the channel impulse response between the wireless transmitting device and the wireless receiving device, and a data field conveying data; wherein the AGC preamble is transmitted in parallel via a plurality of antennas.