Patent ID: 6574292
Filing Date: 2003-06-03
Classification: H03G,H04L

Abstract:
An automatic gain control (AGC) circuit for an orthogonal frequency division multiplexing (OFDM) receiver, the AGC circuit comprising;an amplifier for amplifying radio frequency (RF) OFDM signals to produce amplified RF OFDM signals; an analog-to-digital (A/D) circuit for generating a plurality of time domain samples of the amplified RF OFDM signals; and at least one processor connected to the A/D circuit and the amplifier, the at least one processor for adjusting a gain of the amplifier in accordance with a relationship between a threshold and a time sample signal level of the plurality of time domain samples, the at least one processor for adjusting the gain of the amplifier in accordance with another relationship between another threshold and a frequency sample signal level of frequency sample values associated with a plurality of pilot tones of the RF OFDM signals.