Burst signal detecting and AGC method for orthogonal frequency division multiplexing system
A technology of automatic gain control and burst signal, applied in the direction of orthogonal multiplexing system, multiplexing communication, transmission system, etc., can solve the problem of frame synchronization and frequency synchronization of lost, easily affected, and unfavorable OFDM receiving systems and other issues to achieve the effect of reducing time and improving performance
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[0041] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and application embodiments of a single carrier OFDM communication system.
[0042] The present invention can be applied to the wireless LAN IEEE802.la receiving system, the functional block diagram is as follows figure 1 Shown. At the receiving end, after the signal is received by the antenna, it passes through a band-pass filter to filter out the noise signal outside the passband of the filter, and the filtered signal is input to the first-stage power amplifier to amplify the signal. The amplified signal will go through the analog quadrature demodulation DAQM module. The main function of this module is to directly demodulate the signal from the intermediate frequency to the baseband. This is much more convenient and more efficient than the previous multi-level demodulation method. . In order to perform digital signal detection in the baseband, an ...
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