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The paper proposes a practical method for AGC (automatic gain control) in an HPI (high-speed portable Internet) system. Downlink packets in this system consist of preamble symbols for AGC, AFC (automatic frequency control) and other purposes, and data symbols for traffic transmission. We compare the theoretical BER performance with the simulation one and produce an optimum parameter for AGC in this system. The proposed AGC method utilizes the preamble and requires a small amount of hardware. The validity of the proposed method is verified by computer simulation and real implementation.
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th (Volume:7 )
Date of Conference: 26-29 Sept. 2004