# Lattice Coding for Downlink Multiuser Transmission

## TL;DR

This thesis explores lattice coding schemes for downlink multiuser communication, aiming to approach theoretical capacity limits by leveraging lattice structures to manage interference among users.

## Contribution

It provides a systematic design approach for lattice coding and modulation in downlink multiuser systems, addressing a gap in practical coding scheme development.

## Key findings

- Proposes lattice coding schemes that exploit interference structure.
- Demonstrates potential to approach capacity limits.
- Offers systematic design methodology for practical implementation.

## Abstract

In this thesis, we mainly investigate the lattice coding problem of the downlink communication between a base station and multiple users. The base station broadcasts a message containing each user's intended message. The capacity limit of such a system setting is already well-known while the design of practical coding and modulation schemes to approach the theoretical limit has not been fully studied and investigated in the literature. This thesis attempts to address this problem by providing a systematic design on lattice coding and modulation schemes for downlink multiuser communication systems. The main idea is to exploit the structure property of lattices to harness interference from downlink users.