A Computer-Aided Solution to Find All Feasible Schemes of Cyclic Interference Alignment for Propagation-Delay Based X Channels.

To obtain a full picture of potential applications for propagation-delay based X channels, it is important to obtain all feasi-ble schemes of cyclic interference alignment including the encoder, channel instance, and decoder. However, when the dimension goes larger, theoret-ical analysis about this issue will become tedious and even impossible. In this letter, we propose a computer-aided solution by searching the chan-nel space and the scheduling space, which can find all feasible schemes in details. Examples are given for some typical X channels. Computational complexity is further analyzed.