Patent ID: 7529621

Claim:
A collision avoidance system mounted onboard a rotary-winged host vehicle having a rotor causing a respective communication interruption, said host is assigned with a unique time slot in a data link communication network for transmitting data in the form of pulses to other participants, said collision avoidance system comprising: a central processing unit configured for receiving inertial motion information from an INS, position information and time synchronization from a GPS receiver and data indicative of state information of at least one participant from a data link radio, and for producing a collision avoidance data regarding said host vehicle and said participant; a radio controlling utility connectable to said central processing unit and said data link radio for receiving a pulse width depending upon at least a duration of said communication interruption and said time slot, giving rise to a modulated pulse; and for generating and transmitting a repetition of substantially identical modulated pulses, each of which indicate the state information of said host, thereby substantially reducing data discrepancies due to rotor interruptions; and an output device coupled to the central processing unit for providing visual and/or audio avoidance warnings and/or instructions.