Patent ID: 8792575

Claim:
A method for receiving a data frame with a multiple-antenna apparatus, said data frame comprising a non-data sequence and a data sequence, said method comprising the steps of: entering a state for receiving said non-data sequence and turning on N receiving routes to receive said non-data sequence of said data frame, wherein said non-data sequence comprises a preamble sequence and a header sequence; determining first and second information based on said non-data sequence; selecting plural threshold levels for said first information according to said second information; defining said N receiver routes according to different quality levels based on said first information and said plural threshold levels; and entering a state for receiving said data sequence and turning on M of said N receiving routes to receive said data sequence of said data frame, wherein M is less than N, wherein said turning on of M receiving routes is based on said defined receiver routes and said second information, wherein M is an integer greater than or equal to 1.