Receive attenuation system for trainline communication networks
First Claim
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.
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Accused Products
Abstract
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.
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Citations
20 Claims
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1. A receive attenuation system for a trainline communication system utilizing an intra-consist electrical cable, the system comprising:
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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, and control the adjustable attenuator according to the supplemental attenuation control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of adjusting receive attenuation in a trainline communication system, the method comprising:
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detecting a receive gain control signal generated by a trainline communication processor, wherein the receive gain control signal is configured to control receive gain of an analog front end amplifier; determining a supplemental attenuation control value based on the detected receive gain control signal, and controlling an adjustable attenuator according to the supplemental attenuation control signal, the adjustable attenuator coupled to an 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. - View Dependent Claims (12, 13, 14, 15)
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16. A locomotive consist comprising:
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an intra-consist electrical cable; a first locomotive having a first access point configured to transmit signals via the intra-consist electrical cable; a second locomotive having a second access point including; an Ethernet bridge including a trainline communication processor configured to generate receive gain control signals; an analog front end amplifier coupled to the Ethernet bridge and configured to receive the gain control signals from the trainline communication processor; an adjustable attenuator coupled to the intra-consist electrical cable and the analog front end amplifier, the adjustable attenuator configured to variably attenuate the signals received from the first access point via the intra-consist electrical cable before transmitting the received signals to the analog front end amplifier; and a gain controller coupled to the adjustable attenuator configured to; detect the receive gain control signals 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. - View Dependent Claims (17, 18, 19, 20)
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Specification