Signal processing device for a communication system usable in particular in a battery system

A communication system for a battery system comprising:

• a signal processing device;
• a battery that includes a plurality of battery modules, wherein each of the battery modules includes one or more battery cells;
• a plurality of communication lines;
• and
• a plurality of communication modules;
• wherein:
• the plurality of communication modules are configured to:
• monitor a functional state of the battery or of one of the battery modules;
• and
• communicate with one another via a communication signal contained in a transmission signal transmitted via the communication lines;
• the signal processing device includes a signal path, a signal detector, a signal synthesizer, a transmitter, and an analog-to-digital converter;
• the signal path is configured to (a) receive the transmission signal and (b) transmit the received transmission signal;
• the signal detector is configured to detect a presence of an interference signal contained in the transmission signal and occurring due to narrowband interferences;
• in response to the detection of the presence of the interference signal:
• the signal detector is configured to generate an activation signal;
• and
• the signal synthesizer is configured to generate an approximation signal that reproduces the interference signal within predefined tolerance limits;
• the transmitter is configured to (a) receive the transmission signal transmitted by the signal path and the approximation signal and (b) output a difference signal between the transmission signal and the approximation signal;
• and
• the analog-to-digital converter is configured to convert a signal that is generated based on the difference signal output by the transmitter into a digital signal.

A signal processing device comprising:

• a signal path;
• a signal detector;
• a signal synthesizer;
• a transmitter;
• and
• an analog-to-digital converter;
• wherein:
• the signal path is configured to (a) receive a transmission signal transmitted by a communication system and containing a communication signal and (b) transmit the received transmission signal;
• the signal detector is configured to detect a presence of an interference signal contained in the transmission signal and occurring due to narrowband interferences;
• in response to the detection of the presence of the interference signal:
• the signal detector is configured to generate an activation signal;
• and
• the signal synthesizer is configured to generate an approximation signal that reproduces the interference signal within predefined tolerance limits;
• the transmitter is configured to (a) receive the transmission signal transmitted by the signal path and the approximation signal and (b) output a difference signal between the transmission signal and the approximation signal;
• the analog-to-digital converter is configured to convert a signal that is generated based on the difference signal output by the transmitter into a digital signal;
• and
• the signal processing device is configured so that the signal synthesizer always generates the approximation signal as a periodic signal.