Performance Analysis of Zigzag with RS coded WiMAX System

The Worldwide Interoperability for Microwave Access is the IEEE 802.16 family of standard. The IEEE 802.16 standard defines Wireless MAN (metropolitan area network). The IEEE WiMAX/802.16 standard for broadband wireless metropolitan area networks (WMANs) can deliver high throughput over long distances, and support different qualities of services, offers a wireless backhaul network that enables high speed internet access to residential, small and medium business customers. This promising and cost-effective technology can also support internet access for Wi-Fi hot spots and cellular base stations through their respective access points [1]. It has been designed to provide high data rate communication in metropolitan area wireless networks [2]. The WiMax, for broadband wireless access is employed for high speed and low cost, which is easy to deploy, and provides a better alternative for extension of fiber-optic backbone. The base stations of WiMAX can provide greater wireless coverage of about 5 miles, with LOS (line of sight) transmission within the bandwidth of up to 70 Mbps. In this paper, we evaluate bit-error rate performance of WiMAX system using zigzag with RS coded modulation for different code rate and code length. The results show that the proposed zigzag-coded modulation combined with RS coding presents a stronger error correcting capability as compared to the Reed Solomon with Convolutional code or only zigzag code.