RADIO-FREQUENCY SIGNAL AUTO DETECTOR OF DIGITAL BROADCAST SYSTEM AND DETECTING METHOD OF RADIO-FREQUENCY SIGNAL

摘要

The present invention automatically detects the strength of the signal received and thus amplify the signal to elaborate or relates to a signal detection device and signal detection method in a digital broadcasting system to maintain good reception quality in a wide range of field environments by attenuation, signal detection apparatus amplifier for amplifying a received radio frequency signal through an antenna according to the present invention; The attenuator for attenuating a received radio frequency signal through an antenna; And the noise value for measuring the noise figure of the radio frequency signals received through the antenna measurement module, for calculating the sensitivity of the sensitivity levels of the radio frequency signal using the noise figure value calculation module, the visible blue limit according to the sensitivity value to set the bit error rate behavior of the amplifier or attenuator based on the error and the calculated error calculation module that calculates the error between the received radio frequency signal and the visible blue limit bit error rate or amplifying the radio frequency signal / attenuation characterized in that it comprises a controller configured to control the module without passing. ; According to the present invention, stable in a variety of field environments without the need for additional manipulation of the user and maintain excellent reception quality and can be implemented in the signal detection device, also, there is an effect that the production cost and small tonghayeoseo process to implement digital broadcasting system that also maintains a high reception ratio.