Evaluation of Interference Cancellation Architectures for Heterogeneous Cellular Networks

Inhaltsverzeichnis (Table of Contents)

• Notations
• Acronyms
• 1 Introduction
  • 1.1 Motivation and Objective
  • 1.2 Outline and Organization of the Thesis
• 2 Fundamentals
  • 2.1 Bit-Interleaved Coded Modulation
    • 2.1.1 System and Signal Model
    • 2.1.2 Low Complexity LLR Metrics for BICM Receivers
  • 2.2 Interference-Aware System
  • 2.2.1 IA Receiver: System & Signal Model
• 3 Structure of the Simulator
  • 3.1 System Parameters & General Code Structure
  • 3.2 Radio Propagation Channel
    • 3.2.1 Simulation of AWGN-Channel model
    • 3.2.2 Path Loss Channel Model
    • 3.2.3 Simulation of Rayleigh Fading Channel
  • 3.3 The Baseband Part of the Transmitter
    • 3.3.1 Convolutional Coding and Puncturing
    • 3.3.2 Bit-Interleaver
    • 3.3.3 Bit-Level Scrambling
  • 3.4 Interference Model
  • 3.5 The Baseband Part of the Receiver
    • 3.5.1 Pilot-based Channel Estimation
    • 3.5.2 De-Puncturing and Soft Output Viterbi Decoding
    • 3.5.3 Metric Computing Device
  • 3.6 Base Stations Channel Estimation Enhancement
    • 3.6.1 Serving Base Station: Holes

Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

This thesis aims to evaluate the effectiveness of interference cancellation architectures for heterogeneous cellular networks. It explores the challenges of managing inter-cell interference in such networks and investigates the potential benefits of downlink interference cancellation at the user equipment (UE).

• Interference cancellation in heterogeneous cellular networks
• Downlink interference cancellation at the user equipment (UE)
• The role of base stations in interference cancellation
• Limitations and solutions for interference cancellation
• Evaluation of different interference cancellation architectures

Zusammenfassung der Kapitel (Chapter Summaries)

The thesis begins with an introduction that outlines the motivation and objectives of the work. Chapter 2 provides foundational information on bit-interleaved coded modulation (BICM) and interference-aware systems. It describes the system and signal models for these concepts, including the low-complexity LLR metrics for BICM receivers. The third chapter focuses on the structure of the simulator used for the analysis. It details the system parameters, code structure, radio propagation channel modeling, and the baseband parts of the transmitter and receiver. The chapter also includes information on interference modeling and channel estimation techniques. Chapter 4 examines the limitations of downlink interference cancellation and proposes two potential solutions depending on the surrounding base stations.

Schlüsselwörter (Keywords)

Heterogeneous cellular networks, interference cancellation, downlink, user equipment, channel estimation, base stations, BICM, LLR metrics, simulation, radio propagation channel, interference modeling, AWGN-channel, Rayleigh Fading Channel, path loss, convolutional coding, puncturing, de-puncturing, Soft Output Viterbi Decoding, pilot-based channel estimation.