Concurrent operation of intelligent transportation system (ITS) radios in a same frequency band with a common antenna

A device for vehicular communications comprising:

• a first intelligent transportation system (ITS) radio adapted to communicate with remote ITS nodes using a first communication protocol;
• a second ITS radio adapted to communicate with remote ITS nodes over a second wireless channel in the same frequency band using a second communication protocol different from the first communication protocol;
• a common antenna communicatively coupled to the first and second ITS radios enabling simultaneous unsynchronized transmit (TX) signals from, and receive (RX) signals to, both ITS radios;
• and
• self-interference cancellation (SIC) circuitry adapted to reduce interference of desired RX signals at the first or second ITS radios due to communications by the opposite ITS radio using a combination of circuits arranged to provide passive RF isolation of respective radio signals at the common antenna, active analog radio frequency (RF) self-interference cancellation (RFSIC) and baseband self-interference cancellation.