Wireless communication system with improved automatic gain control

摘要

A wireless communication device is disclosed that includes an automatic gain controller capable of accurately adjusting gain of a received signal. The received signal includes a plurality of symbols, including pilot symbols that each includes at least one pilot tone, and data symbols that do not include any pilot tones. A power of a pilot symbol is determined, and a power of a data symbol is determined. The determined data symbol power is then scaled by a scaling factor (that depends on various system parameters) and is subtracted from the determined pilot symbol power to provide an estimate of a power of the pilot tones within the signal. From the estimated pilot tone power, the automatic gain controller can accurately determine a preferred gain for amplifying future frames of the received signal.

主权项

1. A wireless communication device, comprising:
a receiver module configured to receive a signal; a measurement module configured to estimate a pilot power of a pilot tone within the received signal by:
measuring a pilot symbol power of a selected pilot symbol that includes the pilot tone;measuring a data symbol power of a selected data symbol within the received signal;scaling the data symbol power based on a number of pilot tones within the selected pilot symbol; anddetermining the pilot power based on the scaled data symbol power; and a gain module configured to determine a gain based on the pilot power.