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Receiver with variable gain elements and automatic gain control to maintain a positive signal to noise ratio margin
Receiver with variable gain elements and automatic gain control to maintain a positive signal to noise ratio margin
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机译:具有可变增益元件和自动增益控制的接收器,可保持正的信噪比裕度
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摘要
A receiver comprising: one or more variable gain elements; an automatic gain control (AGC) for controlling a gain of one or more of the one or more the variable gain elements; and a frame detector configured to detect the presence of a frame in a signal received by the receiver and to output a signal to the AGC on detection of a data frame, wherein the AGC is configured to estimate a signal to noise ratio (SNR) of the received signal on receiving an input signal from the frame detector, to calculate a SNR margin between the estimated SNR and a target SNR and to adjust the gain of one or more of the one or more variable gain elements to maintain a positive SNR margin such that in the event of interference with the received signal the one or more variable gain elements do not saturate.
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