UGC Approved Journal no 63975

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Published in:

Volume 6 Issue 6
June-2019
eISSN: 2349-5162

UGC and ISSN approved 7.95 impact factor UGC Approved Journal no 63975

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Published Paper ID:
JETIRDC06045


Registration ID:
221878

Page Number

250-254

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Title

DIFFERENT CHANNEL ESTIMATION TECHNIQUES USED IN MIMO-OFDM COMMUNICATION SYSTEMS-A SURVEY

Abstract

Modern communication system is more fascinated about wireless communication, in which the data can be delivered wirelessly. Wireless communications, usually works through “Electromagnetic” (EM) waves by which the data is send by air, which acts a medium. But the medium or channel considered in wireless system changes over time i.e., it is time-varying in nature. Even the signals transmitted through wireӏess systems may get affected by multipаth propagations. In realism, the status of channel is unknown. So, the “Channel Estimation” is very essential in wireless communications. Mostly the estimation of channel is carried out at the receiver end. Therefore to precisely estimate the channel various techniques are employed. The techniques like Least Square (LS), Minimum Mean Square Error (MMSE), blind and semi-blind, training based channel estimation methodѕ. As the estimation is carried out at the receiver the pilot sequences are utilized by which the evaluation can be done with ease and accurately estimate the channel. In technologies like, OFDM, MIMO-OFDM this estimation plays a very crucial role as high data rate signals are transmitted through the subcarriers which are modulated and overlapped orthogonally with each other. The paper gives the introduction to OFDM and MIMO-OFDM systems and also briefs about different pilot allocation methods used for estimation and discusses about the channel estimation algorithms deployed in wireless communications.

Key Words

Orthogonal Frequency Division Multiplexing (OFDM), Multiple Input Multiple Output (MIMO), Least Square (LS), Minimum Mean Square Error (MMSE), Electromagnetic (EM).

Cite This Article

"DIFFERENT CHANNEL ESTIMATION TECHNIQUES USED IN MIMO-OFDM COMMUNICATION SYSTEMS-A SURVEY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.250-254, June 2019, Available :http://www.jetir.org/papers/JETIRDC06045.pdf

ISSN


2349-5162 | Impact Factor 7.95 Calculate by Google Scholar

An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 7.95 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator

Cite This Article

"DIFFERENT CHANNEL ESTIMATION TECHNIQUES USED IN MIMO-OFDM COMMUNICATION SYSTEMS-A SURVEY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp250-254, June 2019, Available at : http://www.jetir.org/papers/JETIRDC06045.pdf

Publication Details

Published Paper ID: JETIRDC06045
Registration ID: 221878
Published In: Volume 6 | Issue 6 | Year June-2019
DOI (Digital Object Identifier):
Page No: 250-254
Country: Chennai, Tamil Nadu, India .
Area: Engineering
ISSN Number: 2349-5162


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