Interference Alignment in Frequency-Domain Using Doppler Effect

10.6919/ICJE.202205_8(5).0090

Bisheng Liu；Feng Liu

Doppler Effect ； Interference Alignment ； Frequency Domain ； X Channel

International Core Journal of Engineering

8卷5期（2022 / 05 / 01）

701 - 709

英文

This letter investigates the implementation of perfect interference alignment (IA) in frequency-domain for 2×2 X channels, where each of the two source nodes sends two independent messages to each of the two destination nodes. The key is to change the frequency of the interference signal to ensure that it does not overlap with the desired signal. We propose an IA approach using the Doppler effect. The system consists of four access points, each of which has a circular drum antenna. The circular drum antenna is designed in such a way that it shifts the interfering signals away from the desired signal band. We give two specific schemes and their constraints, and prove their feasibility.

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