Automatic gain control device and method thereof
A technology of automatic gain control and controller, applied in the field of communication, to achieve the effects of good spectral characteristics, small computational complexity and simple hardware structure
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[0058] The present invention will be further described below in conjunction with the drawings.
[0059] The invention can be used in a variety of communication systems, such as audio and video broadcasting, wireless local area networks, cellular systems, power line carrier systems, etc.; it can be used in multi-carrier systems and single-carrier systems. The following is an embodiment of the present invention based on an OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) receiving system. figure 1 It is a schematic diagram of the frame structure provided by this embodiment, which is composed of several OFDM symbols.
[0060] See figure 2 , The automatic gain control device of one of the present invention includes: analog VGA 10, ADC (analog-to-digital converter) 11, down-sampling unit 12, power calculation unit 13, analog AGC controller 14, digital AGC controller 15, and digital VGA 16; Analog VGA10, ADC11, down-sampling unit 12 and digit...
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