What role does Automatic Gain Control serve in signal processing?

Automatic Gain Control (AGC) plays a critical role in signal processing by adjusting the strength of the signal. Its primary function is to mitigate fluctuations in signal amplitude that can occur due to various factors, such as changes in the input signal strength or varying conditions in the environment. By dynamically adjusting the gain applied to the input signal, AGC ensures that the output remains within a desired range, which enhances the overall quality of the transmission and prevents distortion that could arise from signals being too weak or too strong.

This functionality is particularly important in communication systems where consistent signal quality is essential for maintaining clarity and intelligibility. AGC helps to optimize the signal for further processing or transmission, thus contributing significantly to the effectiveness of signal processing systems.