The system comprises at least two sensors of object detection that each comprise a transmitter for producing an original periodic signal, one or two antennas for transmitting the original signal and, after the original signal has reflected off the object, receiving a reflected signal, and a receiver for detecting an information related to the object using the received reflected signal, wherein the transmitting antenna has a radiation pattern including a main lobe and side lobes at various angles, characterized in that the two sensors have respective coverage areas that overlap, and the transmitter of one of the two sensors, that is the transmitter sensor, encodes data to be transmitted to the other one of the two sensors, that is the receiver sensor, by modulating the original signal radiated by the transmitting antenna of the transmitter sensor.