Lattice Partition Multiple Access: A New Method of Downlink Non-orthogonal Multiuser Transmissions

Abstract

In this paper, we propose a new downlink non-orthogonal multiuser superposition transmission scheme for future 5G cellular networks, which we refer to as the lattice partition multiple access (LPMA). In this proposed design, the base station transmits multilevel lattice codes for multiple users. Each user's code level corresponds to a distinct prime and is weighted by a product of all distinct primes of the other users excluding its own. Due to the structural property of lattice codes, each user can cancel out the interference from the other code levels by using the modulo lattice operation in a successive/parallel manner. LPMA can overcome the drawback of non-orthogonal multiple access (NOMA), which arises when users have similar channel conditions. We demonstrate that the proposed LPMA shows a clear throughput enhancement over the current NOMA scheme.

arXiv comment5 pages, 7 figures

References in corpus (1)

• Construction ${\pi }_A$ and ${\pi }_D$ Lattices: Construction, Goodness, and Decoding Algorithms

Cited by in corpus (5)

• A Survey on Non-Orthogonal Multiple Access for 5G Networks: Research Challenges and Future Trends
• Non-Orthogonal Multiple Access for 5G and Beyond
• Impact of Non-orthogonal Multiple Access on the Offloading of Mobile Edge Computing
• Modulation and Multiple Access for 5G Networks
• Enhanced Multiuser Superposition Transmission through Structured Modulation