Chapter 8: Multiplexing and Multiple Access Methods

The following sections are included:

• Chapter’s Learning Outcomes

• Introduction

  • Multiplexing versus Multiple Access

  • Orthogonality: The Foundation of Multiplexing

  • Medium Access Control Schemes

  • Check Your Understanding

• FDM and FDMA

  • FDM in PSTN/POTS

  • FDM in 1G Cellular Mobile Systems

  • Problems in FDM

  • Check Your Understanding

• TDM and TDMA

  • Synchronous TDM

  • Asynchronous TDM

  • Hybrid FDMA/TDMA Systems

  • Check Your Understanding

• CDM and CDMA

  • Pseudo-Random Noise Codes

  • FHSS and Its Application in Bluetooth

  • Check Your Understanding

• Random and Round-Robin Multiple Access Schemes

  • Aloha and Slotted Aloha

  • CSMA, CSMA/CD and CSMA/CA

  • Round-Robin Protocols

  • Check Your Understanding

• OFDM, OFDMA, SC-FDMA and Their Variants

  • Subcarrier Allocation Methods

  • OFDM Basics

  • OFDMA in LTE/LTE-A

  • SC-FDMA in LTE/LTE-Advanced and 5G

  • OFDM Extensions

  • LTE Channels and Scheduling

  • Check Your Understanding

• Channel-Aware Multiple Access Schemes

  • Link Adaptation Schemes

  • LTE Link Adaptation Through AMC

  • Opportunistic Scheduling

  • Check Your Understanding

• Non-Orthogonal Multiple Access Schemes

  • Basic Principles in NOMA

  • Low Density Signature Multiple Access

  • Sparse Code Multiple Access

  • Multi-User Shared Access

  • Pattern Division Multiple Access

  • Check Your Understanding

• Review of Important Terms and Acronyms

• Supplementary Reading