The present disclosure relate to an indirect tire pressure monitoring system (TPMS). In some embodiments, the indirect TPMS has magnetic field sensor that detects a modulated magnetic field indicative of one or more resonance parameters of an automobile tire. The magnetic field sensor generates a modulated sensor signal based upon the modulated magnetic field. An analog-to-digital converter (ADC) converts the modulated sensor signal to a digital sensor signal, which is provided to a digital signal processing unit that perform analysis of the digital sensor signal to determine the one or more resonance parameters. A communication interface transmit data corresponding to the one or more resonance parameters to an electronic control unit (ECU).