Marvell International Limited

Meng Zeng

Kok-Wui Cheong

Junqing Phil Sun

Shaoan Dai

Xing Wu

Zhenzhong Gu

A transceiver to communicate in a vehicle via a single twisted-pair Ethernet cable includes a transmitter and a receiver, an analog front end, an equalizer, and a controller. The transmitter transmits signals via the single twisted-pair Ethernet cable. The receiver receives signals via the single twisted-pair Ethernet cable. The analog front end receives a first signal received by the transceiver via the single twisted-pair Ethernet cable and outputs a second signal. The equalizer includes a notch filter to cancel electromagnetic interference from the second signal. The controller makes a frequency response of the equalizer independent of the electromagnetic interference by controlling tap values of the notch filter. The controller controls gain of one or more of the analog front end and the equalizer based on the frequency response of the equalizer.

Interference mitigation in single twisted-pair communications

A transceiver to communicate in a vehicle via a single twisted-pair Ethernet cable includes a transmitter to transmit signals via the single twisted-pair Ethernet cable and a receiver to receive signals via the single twisted-pair Ethernet cable. The transceiver includes an equalizer, a signal-to-noise ratio estimator, and a controller. The equalizer includes a notch filter and a slicer. The equalizer receives an input signal received by the transceiver via the single twisted-pair Ethernet cable. The notch filter cancels electromagnetic interference from the input signal and to output a filtered signal. The slicer slices the filtered signal. The signal-to-noise ratio estimator estimates a signal-to-noise ratio based on an output of the slicer. The controller controls a rate of adapting the equalizer by controlling a rate of change of tap values of the notch filter based on the signal-to-noise ratio.

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Saratoga, CA, United States of America

Meng Zeng