Electromagnetic interference cancellation in vehicle networks

Abstract

A physical layer transceiver for a vehicular network includes receive path circuitry configured to, in an analog domain, receive an incoming signal from the vehicular network, where the incoming signal comprises an analog signal subject to electromagnetic interference (EMI) and convert the incoming signal into a digital signal. The transceiver also includes EMI detector circuitry configured to, in a digital domain, determine a primary frequency associated with the EMI, and EMI cancelling circuitry configured to derive, in the digital domain, a correction signal having a delay length based on the primary frequency determined in the digital domain and associated with the EMI, and add, in the analog domain, the correction signal derived in the digital domain to the incoming signal to reduce the EMI in the digital signal. In some implementations, the transceiver also includes a colored noise canceller filter to further reduce the EMI in the digital signal.