Abstract: An electronic device is described. This electronic device may include a communication circuit (such as an integrated circuit) that combines an interrogator and a transponder. Notably, the communication circuit may dynamically and temporally interleave an interrogator or the transponder transmission with a transponder response to a second interrogator or the second transponder transmission associated with a second electronic device. Moreover, the electronic device may include or may be selectively electrically coupled to at least an omnidirectional antenna that is used for bidirectional communication, such as: transmitting the interrogator or the transponder transmission (or message), receiving the second interrogator or the second transponder transmission (or message), and/or transmitting the transponder response to the second interrogator or the second transponder transmission.

Abstract: An electronic device is described. This electronic device may include: a first type of memory that stores a collision avoidance and detection data structure having a predefined size, a second type of memory, and a processor. For example, the first type of memory may include a volatile memory (such as flash memory), and the second type of memory may include a non-volatile memory (such as dynamic random access memory or DRAM). During operation, the electronic device may access, in the first type of memory, a subset of the collision avoidance and detection data structure based at least in part on current conditions, where the subset is less than the predefined size, and the current conditions include a position and speed of the electronic device. Then, the electronic device may load the subset from the first type of memory to the second type of memory.

Abstract: An electronic device (such as a transponder or an aircraft that includes the transponder) is described. This electronic device may include: one or more omnidirectional antennas; and one or more integrated circuits (such as one or more radios) that transmit and receive RF signals. During operation, the electronic device may receive, using the one or more omnidirectional antennas, broadcast information associated with a second electronic device (such as a second transponder or a second aircraft that includes the second transponder), where the broadcast information is compatible with a regulation from a government aviation or aviation safety administration (such as the Federal Aviation Administration or the European Union Aviation Safety Agency). Then, the electronic device may determine a track of the second electronic device based at least in part on the broadcast information.