Receive attenuation system for trainline communication networks

摘要

A receive attenuation system for a trainline communication system utilizing an intra-consist electrical cable has an analog front end amplifier, a trainline communication processor, an adjustable attenuator, and a gain controller. The trainline communication processor is configured to generate a receive gain control signal configured to control receive gain of the analog front end amplifier. The adjustable attenuator is capable of being coupled to the intra-consist electrical cable and configured to variably attenuate signals received from the intra-consist electrical cable before transmitting the signals to the analog front end amplifier. The gain controller is coupled to the adjustable attenuator and configured to detect the receive gain control signal generated by the trainline communication processor, determine a supplemental attenuation control value based on the detected receive gain control signal, and control the adjustable attenuator according to the supplemental attenuation control signal.

主权项

1. A receive attenuation system for a trainline communication system utilizing an intra-consist electrical cable, the system comprising:
an analog front end amplifier; a trainline communication processor configured to generate a receive gain control signal configured to control receive gain of the analog front end amplifier; an adjustable attenuator capable of being coupled to the intra-consist electrical cable and configured to variably attenuate signals received from the intra-consist electrical cable before transmitting the signals to the analog front end amplifier; and, a gain controller coupled to the adjustable attenuator and configured to:
detect the receive gain control signal generated by the trainline communication processor,determine a supplemental attenuation control value based on the detected receive gain control signal, andcontrol the adjustable attenuator according to the supplemental attenuation control signal.