The invention provides a smart community. Transmission of various signals is required in the smart community. The acquired analog or digital electric signals (i.e. modulation signals) of the basic environment in the smart community and the generation resonant frequency (i.e. carrier waves) generated by a first frequency modulation loop are modulated into high frequency signals. The modulation coefficient of the high frequency signals is further adjusted through a second frequency modulation loop to generate the required optimal transmission frequency, and then the amplitude of the signals is enhanced through a signal amplification circuit so that the problems of restriction of signal transmission distance and delay caused by attenuation of the signals in the transmission process can be solved. The differential mode anti-interference circuit in a filter circuit performs suppression and the differential mode filter circuit and the common mode filter circuit in the filter circuit filter the interference for solving the parasitic interference and the interference of external random noise in the frequency modulation process so that the anti-interference performance and the stability canbe enhanced, then the transmitter transmits the signals to the control terminal of the smart community and thus timely and accurate transmission of the signals can be guaranteed.