Work

Optimal Backward Transmission of Reciprocal X Channels with Two Receivers via Cyclic Interference Alignment

Year: 2025

Type: article

Abstract: For a given forward transmission scheme, the backward transmission in reverse direction is often wanted in practical communications. This letter proposes an optimal scheme for the backward transmission of the propagation-delay (PD) based general X channel with two receivers, which is reciprocal to forward transmission. With cyclic interference alignment, the desired messages are shown to be allocated at specified time-slots without interference, while other interfering messages are aligned in the remaining time-slots. Thus the backward transmission achieves the maximal degrees of freedom (DoF) with the reciprocal PD channel, which supports optimal bidirectional transmission of the X channel with two receivers.

Source: IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences

DOI: 10.1587/transfun.2025eal2011

Authors: Daozheng CHEN, Feng LIU, Conggai LI, Jun GAO, Yanli XU

Institutions: Shanghai Maritime University, Shanghai Jian Qiao University

Language: English

Topic: Advanced MIMO Systems Optimization

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, Shanghai Municipal Education Commission

Awards: G6861395468, G7413427463, G8296817548