Delay Doppler Division Multiple Access Resource Allocation in Aircraft Network

Aircraft network has a wide range of applications and plays an important role in various fields. However, the wide distribution and high dynamic motion of aircraft pose challenges to the multiple access management in aircraft networks. On the one hand, different relative distance of aircraft lead to different channel delays, and when the distance between aircraft is far, time-domain multiple access protocols require large guard intervals; On the other hand, the high-speed movement of aircraft leads to Doppler frequency shift on the received signal, resulting in inter carrier interference in frequency domain multiple access methods. These disadvantages extremely reduce the overall performance of the network. In this article, we use delay Doppler (DD) communication technology to provide multiple access for dynamic aircraft networks. Specifically, in the uplink channel of the aircraft network, we distinguish aircraft with different relative distances and velocities on the DD domain, and proposed a heuristic based resource allocation algorithm to allocate DD domain resources to each aircraft, thereby reducing the interference between aircraft. The simulation results show that compared to the benchmarking algorithm, the proposed algorithm can effectively improve the transmission rate of the aircraft network.