| 摘要 |
A system including a variable gain amplifier, an automatic gain control module, and a channel estimation module. The variable gain amplifier amplifies an input signal in accordance with a gain. The input signal includes a plurality of orthogonal frequency domain multiplexing symbols. Each of the plurality of orthogonal frequency domain multiplexing symbols is preceded by a respective cyclic prefix. The automatic gain control module adjusts, based on a signal strength of the input signal, the gain of the variable gain amplifier during the respective cyclic prefix preceding each of the plurality of orthogonal frequency domain multiplexing symbols. The automatic gain control module generates a control signal in response to the gain of the variable gain amplifier being adjusted. The channel estimation module generates a channel estimate for each of the plurality of orthogonal frequency domain multiplexing symbols and updates the channel estimate based on the control signal.
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