The search functionality is under construction.
The search functionality is under construction.

On the Degrees of Freedom of a Propagation-Delay Based Multicast X Channel with Two Transmitters and Arbitrary Receivers

Conggai LI, Qian GAN, Feng LIU, Yanli XU

  • Full Text Views

    0

  • Cite this

Summary :

Compared with the unicast scenario, X channels with multicast messaging can support richer transmission scenarios. The transmission efficiency of the wireless multicast X channel is an important and open problem. This article studies the degrees of freedom of a propagation-delay based multicast X channel with two transmitters and arbitrary receivers, where each transmitter sends K different messages and each receiver desires K - 1 of them from each transmitter. The cyclic polynomial approach is adopted for modeling and analysis. The DoF upper bound is analyzed and shown to be unreachable. Then a suboptimal scheme with one extra time-slot cycle is proposed, which uses the cyclic interference alignment method and achieves a DoF of K - 1. Finally, the feasibility conditions in the Euclidean space are derived and the potential applications are demonstrated for underwater acoustic and terrestrial radio communications.

Publication
IEICE TRANSACTIONS on Communications Vol.E106-B No.3 pp.267-274
Publication Date
2023/03/01
Publicized
2022/08/23
Online ISSN
1745-1345
DOI
10.1587/transcom.2022EBP3047
Type of Manuscript
PAPER
Category
Wireless Communication Technologies

Authors

Conggai LI
  Shanghai Maritime University
Qian GAN
  Shanghai Maritime University
Feng LIU
  Shanghai Maritime University
Yanli XU
  Shanghai Maritime University

Keyword