A communication system, including: - a first data bus configured to transport a first data signal according to a first transmission direction; - a second data bus configured to transport a second data signal according to a second transmission direction different from the first transmission direction; - a synchronization bus configured to transport a synchronization signal; - a first transceiver unit; and - at least one first resource (R1; R2) coupled to the first transceiver unit, configured to generate a first local signal to be transmitted on the first and/or second data bus (2, 4); wherein the first transceiver unit comprises: a first receiver coupled to the first data bus to receive the first data signal; a second receiver coupled to the second data bus to receive the second data signal; a first transmitter coupled to the first data bus; a second transmitter coupled to the second data bus; a first synchronization module coupled to the synchronization bus to receive the synchronization signal; a first demodulator having an input coupled to the first receiver and an output coupled to the first resource (R1; R2), configured to perform a demodulation of the first data signal; a second demodulator having an input coupled to the second receiver and an output coupled to the first resource (R1; R2), configured to perform a demodulation of the second data signal received by the second receiver; a first modulator having an input coupled to the first resource (R1; R2) and an output coupled to the first and second transmitters (22, 26), configured to receive the first local signal from the first resource (R1; R2) and perform a modulation of the first local signal, generating as output a first modulated signal; said second transmitter being configured to transmit the first modulated data signal on the second data bus according to said second transmission direction; wherein the first transmitter is configured to sum the first modulated signal to the first data signal received by the first receiver from the first data bus, generating a third data signal, and transmit the third data signal on the first data bus according to said first transmission direction and in compliance with a synchronism defined by the synchronization signal; and wherein the second transmitter is configured to sum the first modulated signal to the second data signal received by the second receiver from the second data bus, generating a fourth data signal, and transmit the fourth data signal on the second data bus according to said second transmission direction and in compliance with said synchronism. - a first data bus configured to transport a first data signal according to a first transmission direction; - a second data bus configured to transport a second data signal according to a second transmission direction different from the first transmission direction; - a synchronization bus configured to transport a synchronization signal; - a first transceiver unit; and - at least one first resource (R1; R2) coupled to the first transceiver unit, configured to generate a first local signal to be transmitted on the first and/or second data bus (2, 4); wherein the first transceiver unit comprises: a first receiver coupled to the first data bus to receive the first data signal; a second receiver coupled to the second data bus to receive the second data signal; a first transmitter coupled to the first data bus; a second transmitter coupled to the second data bus; a first synchronization module coupled to the synchronization bus to receive the synchronization signal; a first demodulator having an input coupled to the first receiver and an output coupled to the first resource (R1; R2), configured to perform a demodulation of the first data signal; a second demodulator having an input coupled to the second receiver and an output coupled to the first resource (R1; R2), configured to perform a demodulation of the second data signal received by the second receiver; a first modulator having an input coupled to the first resource (R1; R2) and an output coupled to the first and second transmitters (22, 26), configured to receive the first local signal from the first resource (R1; R2) and perform a modulation of the first local signal, generating as output a first modulated signal; said second transmitter being configured to transmit the first modulated data signal on the second data bus according to said second transmission direction; wherein the first transmitter is configured to sum the first modulated signal to the first data signal received by the first receiver from the first data bus, generating a third data signal, and transmit the third data signal on the first data bus according to said first transmission direction and in compliance with a synchronism defined by the synchronization signal; and wherein the second transmitter is configured to sum the first modulated signal to the second data signal received by the second receiver from the second data bus, generating a fourth data signal, and transmit the fourth data signal on the second data bus according to said second transmission direction and in compliance with said synchronism.