Visual Media Coding and Transmission

8.4 WiMAX IEEE 802.16e Modeling

8.4.1 Introduction

This section features a discussion of the WiMAX IEEE 802.16e system. First, the function of basic components in the WiMAX model is discussed. Second, the simulation results facilitate a study of the performance of WiMAX for different mobile speeds, channel models, and channel coding schemes. Furthermore, this section outlines the developed WIMAX software for trace generation, the error pattern collection method, and the format of the error pattern.

In Subsection 8.4.2, the WiMAX physical layer system is outlined. Subsection 8.4.3 presents the results of WIMAX physical layer performance with different settings and different channel models. Finally, Subsection 8.4.4 discusses the error pattern generation format and parameters. Basic assumptions for the error pattern generation are also presented.

8.4.2 WIMAX System Description

The IEEE 802.16e-2005 standard [52] provides specification of an air interface for fixed, nomadic, and mobile broadband wireless access systems with superior throughput performance. It enables non-line-of-sight reception, and can also cope with high mobility of the receiving station. The IEEE 802.16e extension enables nomadic capabilities for laptops and other mobile devices, allowing users to benefit from metro area portability of an xDSL-like service.

The standard allows the physical layer to be scalable in bandwidth ranging from 1.25 to 20 MHz with fixed subcarrier spacing, while at the same time providing ...