Channel Estimation in OFDM Mobile Wireless Channel Using Pilot Sequences
Journal Title: INTERNATIONAL JOURNAL OF ENGINEERING TRENDS AND TECHNOLOGY - Year 2013, Vol 4, Issue 3
Abstract
Error free transmission is one of the main aims in wireless communications. With the increase in multimedia application, large amount of data is being transmitted over wireless communications. Due to the channel fading and the Doppler shifts caused by user mobility, a common problem in wireless systems, additional technologies are needed to combat multipath propagation fading and Doppler shifts. Time-variant channel estimation is one such crucial technique used to improve the performance of the modern wireless systems with Doppler spread and multipath spread. In this paper, we present the improved scheme of LS based channel estimation technique using block type pilot sequences. Channel estimation is done by estimating the time-varying channel frequency response for the OFDM symbols. The Least Square (LS) method is used for channel estimation technique using the block type pilot sequences. Time-variant channel estimation using pilot Sequences technique is a useful channel estimation technique in mobile wireless communication for accurately estimating transmitted information. The main advantage of pilot sequence is allowing more accurate representation of high mobility mobile wireless channels with low complexity. The MATLAB/SIMULINK Communication tool box is used for implement the proposed model. Due to channel interference, the accuracy of channel estimation is an essential factor for a good receiver design in order to exploit the full potential capacity of the OFDM systems. The main goal is to test the recently proposed method, timevariant channel estimation using pilot sequences.
Authors and Affiliations
Vikas Kumar Batav#1 , Brajlata Chourasiya#
Keywords
Related Articles
- EP ID EP93287
- DOI -
- Views 113
- Downloads 0
Energy Aware and Anonymous Location Based Efficient Routing Protocol
Mobile Ad Hoc Networks (MANETs) uses anonymous routing protocols that hide node identities and routes from outside observers in order to provide anonymity protection. However the existing routing protocols produces high...
A Multi-Level Storage Tank Gauging And Monitoring System Using A Nanosecond Pulse
In this paper, a one-port time-domain/frequencydomain based technique using a short-circuited coaxial geometry inserted vertically in a liquid tank is designed and presented as a multi-level storage tank gauge and monito...
Performance Analysis of Cognitive Radio based on Cooperative Spectrum Sensing
Cognitive radio is an emerging technology that aims for efficient spectrum usage. Cognitive radios have been proposed as a solution to the spectrum underutilization problem and have been proven to increase spec...
Improvement of Rotor Angle Stability and Dynamic Performance of AC/DC Interconnected Transmission System
his paper illustrates a study on improvement of rotor angle and dynamic performance of AC/DC interconnected system. High voltage direct current transmission is an economic way for long distance power delivery and/o...
Mechanical Behaviour of Friction Stir Welding Joints of Aluminium alloy of AA6351 with AA6351 and AA6351 with AA5083
Modern structural application demands reduction in both the weight and as well as cost of the fabrication and production of materials. Aluminium alloys are the best choice for the reduction of weight, cost and replacing...