Patent ID: 7675991

Claim:
A wireless receiving device for communicating with a wireless transmitting device with a wireless packet, the wireless receiving device comprising: a receiver configured to receive 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 used for an estimation of a first 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 used for conveying information regarding 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 used for an estimation of a second channel impulse response between the wireless transmitting device and the wireless receiving device, and a data field conveying data; and a gain controller configured to control a gain of the wireless packet based upon receiving the AGC preamble; wherein the AGC preamble and the data field are transmitted in parallel via a plurality of antennas, and the short-preamble, the first long-preamble, and the signal field are transmitted via at least one of the antennas.