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Performance Evaluation of WiMAX 802.16 Using OFDM With OPNET

30 ViewsPublish: 2025/04/03Author: netsimulate
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Performance Evaluation WiMAX Using OFDM With OPNET

This project involves the simulation of WiMAX 802.16 performance using the OPNET simulator, focusing on different OFDM-based modulation schemes such as BPSK, QPSK, and QAM. The study evaluates key performance metrics, including Bit Error Rate (BER), Signal-to-Noise Ratio (SNR), delay, and throughput, under various network conditions. A step-by-step report detailing the simulation process, configuration settings, and result analysis is provided. Additionally, a video demonstrating the project execution, along with output images, is available on this page, and the original research paper can be downloaded in PDF format. Read the summary of article in the description below.

Article Title:

Evaluation of WIMAX 802.16 Technology Performance by Evaluating the Bit-Error Rate (BER) of OFDM Physical Layer under Different Modulation Schemes and Channel Conditions

Exploring Article And Project

1. Introduction to WiMAX Technology

WiMAX (Worldwide Interoperability for Microwave Access) is a wireless broadband technology designed for both fixed and mobile users. It was first deployed in 2006 in South Korea under the name WiBRO. WiMAX operates under IEEE 802.16 standards and provides quality-of-service (QoS) features, making it ideal for broadband communications. The technology uses different modulation schemes to optimize performance under various conditions.

2. IEEE 802.16 WiMAX Standards

The IEEE 802.16 standard defines the MAC (Medium Access Control) and physical layers of WiMAX but leaves out upper-layer protocols, allowing flexibility in network implementations. The WiMAX Forum was established in 2001 to ensure interoperability between base stations and subscriber stations. The most recent version, based on IEEE 802.16-2009, introduced support for new spectrum bands and enhanced network capabilities.

3. Physical Layer and Modulation Techniques

WiMAX utilizes an RF (radio frequency) physical layer based on OFDM (Orthogonal Frequency Division Multiplexing). OFDM allows efficient spectrum use and supports multiple modulation techniques like BPSK, QPSK, and QAM. The technology can operate in various bandwidths, ranging from 1.25 MHz to 20 MHz, allowing adaptability to different network environments.

4. Common Modulation Techniques in WiMAX

·         WiMAX employs different modulation schemes to balance performance and efficiency. Key techniques include:

·         BPSK (Binary Phase Shift Keying): Simple and robust, but with lower data rates.

·         DPSK (Differential Phase Shift Keying): Encodes data through phase shifts and improves error resistance.

·         GMSK (Gaussian Minimum Shift Keying): A continuous-phase frequency shift keying technique that reduces interference.

·         QAM (Quadrature Amplitude Modulation): Uses both amplitude and phase variations to encode more bits per symbol, improving data throughput.

5. Simulation Setup and Configuration

The study uses the OPNET (Optimized Network Engineering Tool) simulator to model a WiMAX network. Various configurations are set, such as:

·         A frame duration of 5 milliseconds.

·         2048 subcarriers in the OFDM layer.

·         Different modulation schemes tested under various channel conditions.

·         A traffic model that simulates high-load variable bit rate (VBR) applications.

·         And other settings and parameters.

6. Performance Metrics for WiMAX

The study evaluates WiMAX performance based on several metrics:

·         Delay: The time taken for packets to travel through the network.

·         Throughput: The amount of data successfully delivered over time.

·         Traffic Received: The amount of data accurately received at the destination.

·         Traffic Sent: The total data transmitted over the network.

7. Simulation Results and Analysis

The results show that:

·         16QAM provides the lowest delay, making it ideal for real-time applications.

·         BPSK achieves the highest throughput, ensuring stable data transmission under challenging conditions.

·         Traffic reception varies with modulation schemes, with 16QAM showing lower received traffic but higher transmission efficiency.

8. Conclusion and Key Findings

The study concludes that different modulation schemes offer trade-offs between reliability and speed. BPSK is the most stable but has a lower data rate, while QAM-based schemes offer higher throughput but require better channel conditions. The findings suggest that network operators should select modulation schemes based on the required balance between robustness and speed.

Images Output

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ID:22

Description:Project Files in OPNET - Base Article - Guide Video for Run - Simulation Report (word file)

Price:30 $

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