Patent ID: 7450922

Claim:
A method of adjusting a receiving device in response to sensing symbols comprising: (a) adjusting an automatic gain control in response receiving a first symbol of a data unit from a first antenna; (b) after adjusting said automatic gain control receiving at least a second and a third symbol of said data unit and in response thereto (1) calculating a first energy of at least one of said second and third symbol, (2) calculating a first frequency offset of at least one of said second and third symbol, and (3) calculating a first temporal offset of at least one of said second and third symbol; (c) adjusting said automatic gain control in response receiving a fourth symbol of said data unit from a second antenna; (d) after adjusting said automatic gain control receiving at least a fifth and a sixth symbol of said data unit and in response thereto (1) calculating a second energy of at least one of said fifth and sixth symbol, (2) calculating a second frequency offset of at least one of said fifth and sixth symbol, and (3) calculating a second temporal offset of at least one of said fifth and sixth symbol; and (e) selecting at least one of said first and second antenna based upon a function of said first and second energy.