A Comprehensive Review on Channel Estimation in OFDM System

  • Neha Dubey, Ankit Pandit Tech Scholar, Department of Electronics and Communication Engineering Rabindranath Tagore University, Bhopal, India1 Assistant Professor, Department of Department of Electronics and Communication Engineering Rabindranath Tagore University, Bhopal, India2

Abstract

In wireless communication, orthogonal frequency division multiplexing (OFDM) plays a major role because of its high transmission rate. Channel estimation and tracking have many different techniques available in OFDM systems. Among them, the most important techniques are least square (LS) and minimum mean square error (MMSE). In least square channel estimation method, the process is simple but the major drawback is it has very high mean square error. Whereas, the performance of MMSE is superior to LS in low SNR, its main problem is it has high computational complexity. If the error is reduced to a very low value, then an exact signal will be received. In this paper an extensive review on different channel estimation methods used in MIMO-OFDM like pilot based, least square (LS) and minimum mean square error method (MMSE) and least minimum mean square error (LMMSE) methods and also other channel estimation methods used in MIMO-OFDM are discussed.

Published
March 2019
How to Cite
Ankit Pandit, N. D. (2019). A Comprehensive Review on Channel Estimation in OFDM System. INTERNATIONAL JOURNAL ONLINE OF SCIENCE, 5(3), 6. Retrieved from http://ijoscience.com/ojsscience/index.php/ojsscience/article/view/201