Distributed Interference Alignment with Low Overhead

TL;DR

This paper introduces a low-overhead distributed interference alignment scheme for multi-user interference channels, significantly reducing overhead compared to existing iterative methods and maintaining near-optimal performance.

Contribution

The paper proposes a novel low-overhead distributed interference alignment method based on closed-form solutions, extending it to multiple antenna scenarios and demonstrating its advantages over iterative algorithms.

Findings

LOIA greatly reduces overhead compared to IIA.

LOIA achieves near-optimal performance in overhead-limited scenarios.

Simulation results confirm the effectiveness of LOIA.

Abstract

Based on closed-form interference alignment (IA) solutions, a low overhead distributed interference alignment (LOIA) scheme is proposed in this paper for the $K$-user SISO interference channel, and extension to multiple antenna scenario is also considered. Compared with the iterative interference alignment (IIA) algorithm proposed by Gomadam et al., the overhead is greatly reduced. Simulation results show that the IIA algorithm is strictly suboptimal compared with our LOIA algorithm in the overhead-limited scenario.