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An Overview of Various Techniques to Improve Receive Diversity in MIMO OFDM
English
2014
International Journal of Engineering Trends and Technoloy
English
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Keywords-Multiple-input multiple-output (MIMO), orthogonal frequency division multiplexing (OFDM), low density parity check (LDPC) codes, space time block code (STBC), maximal ration combining (MRC), selection ...
MIMO-OFDM system has been currently recognized as one of the most competitive technology for 4G mobile wireless systems. ...
Recently, there have been a lot of interests in combining the OFDM systems with the multiple-input multiple-output (MIMO) technique. ...
doi:10.14445/22315381/ijett-v10p259
fatcat:n3h6smazabayjmvym7uuzf7tqe
SNR and BER Analysis for Multiple Antenna System Using OFDM
2016
IOSR Journal of Electronics and Communication Engineering
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In order to provide the transmit diversity, Space Time Block Code (STBC) is used in the Multiple input multiple output system. ...
Effort has been made for deriving the Signal to noise ratio (SNR) and Bit error rate (BER) for different combination of the MIMO wireless communication system. ...
Figure 2 2 depicts that SNR (dB) and X-axis denotes the normalized Carrier Frequency Offset (CFO). It is observed that SNR is high when Carrier Frequency Offset is zero. ...
doi:10.9790/2834-1104025156
fatcat:c7r33wchuvgqvatokzoe2uitfi
ICI and PAPR enhancement in MIMO-OFDM system using RNS coding
2019
International Journal of Electrical and Computer Engineering (IJECE)
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The Carrier-to-Interference Ratio (CIR), the system Bit-Error-Rate (BER) and the Complementary Cumulative Distribution Function (CCDF) for MIMO-OFDM system with Residue Number System (RNS) coding are analyzed ...
<p><span>The Inter-Carrier-Interference (ICI) is considered a bottleneck in the utilization of Multiple-Input-Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems, due to the ...
For MIMO-OFDM communication systems [5] , the orthogonality seen in OFDM technique is lost within the sub-carriers due to the sensitivity of OFDM to frequency offset induced from the Doppler shift between ...
doi:10.11591/ijece.v9i2.pp1209-1219
fatcat:x23grtumuna2xg5ehmbyocrjsy
Robust Video Transmission Over MIMO-OFDM System using MDC and Space Time Codes
2006
2006 IEEE International Conference on Multimedia and Expo
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MIMO-OFDM is a promising technique for the broadband wireless communication system. ...
The proposed MDC coder generates multiple bitstreams of equal importance which are very suitable for multiple antennas system. ...
Orthogonal frequency division multiplexing (OFDM) has become a promising technique for transmission of signals applied in the broadband wireless communication systems. ...
doi:10.1109/icme.2006.262488
dblp:conf/icmcs/ZhengRYC06
fatcat:jmyoievtljemtisbowwrxfqr3a
Achieving cooperative diversity with multiple frequency offset estimation
2011
2011 5th International Conference on Signal Processing and Communication Systems (ICSPCS)
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This paper proposes an efficient maximum likelihood estimator (MLE) using alternating projection technique, for the joint estimation of Rayleigh fading channels and multiple carrier frequency offsets ( ...
In cooperative communications, estimation and compensation of multiple carrier frequency offsets is an important implementation issue that needs to be addressed in practice. ...
CONCLUSIONS By exploiting maximum likelihood decoding with alternating projection, we have proposed an efficient estimator for multiple carrier frequency offsets and Rayleigh fading channels in cooperative ...
doi:10.1109/icspcs.2011.6140820
dblp:conf/icspcs/NasirDK11
fatcat:tpihbwz6xrg67kgh3mot4j4q4a
Performance Evaluation of Non linear Companding Transform MIMO-OFDM
2014
International Journal of Computer Applications
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In this paper, we deal with the challenges regarding the provision of Inter Carrier interference (ICI) and Peak-to-Average Power Ratio (PAPR) for the performance evaluation of Multiple-Input and Multiple-Output ...
Orthogonal Frequency Division Multiplexing (MIMO-OFDM). ...
G.T Rao, E.C.E Department, G.V.P College of Engineering (Autonomous) for his immense support and valuable suggestions. ...
doi:10.5120/16640-6606
fatcat:7fkxqnmgvzctvjxjldetutbboi
Single-carrier frequency domain equalization
2008
IEEE Signal Processing Magazine
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An alternative promising approach to ISI mitigation is the use of Single-Carrier Frequency Domain Equalization single-carrier (SC) modulation combined with frequencydomain equalization (FDE). ...
nonlinearities, and high sensitivity to carrier frequency offsets (CFOs) [6] . ...
Owing to the single-carrier implementation, SC-FDE also avoids the inherent drawbacks of OFDM such as amplifier nonlinearities, carrier frequency offsets, and phase noise. ...
doi:10.1109/msp.2008.926657
fatcat:ttxo64yqqretnhfecgmbww7jxm
MIMO Self-Heterodyne OFDM
2016
IEEE Transactions on Vehicular Technology
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In this paper, we proposed a multiple-input multiple-output (MIMO) self-het OFDM with the adaption of smart carrier position (SCP) technique. ...
Self-heterodyne OFDM (self-het OFDM) is a promising physical layer technique for millimeter-wave and terahertz RF communication due to its simple RF frontend and complete immunity against frequency-offset ...
In the SISO case, the carrier was positioned in an OFDM subchannel with the highest gain to improve the bit error rate (BER) of the system. ...
doi:10.1109/tvt.2015.2411277
fatcat:z57dadsewrhphptfk2lorunmue
Discrete Wavelet Transform Based Wireless Digital Communication Systems
[chapter]
2011
Discrete Wavelet Transforms - Theory and Applications
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Carrier synchronization error Carrier frequency offset estimation plays an important role in OFDM communication systems because of their high sensitivity to carrier frequency offsets [19] . ...
Due to the carrier frequency difference of the transmitter and receiver, each signal sample at time t contains an unknown phase factor 2 c jf t e πΔ , where ∆f is the unknown carrier frequency offset. ...
This chapter is distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike-3.0 License, which permits use, distribution and reproduction for non-commercial purposes, provided ...
doi:10.5772/16050
fatcat:zkycivwcmre2bdxxpaq4qtmr2i
A road to future broadband wireless access: MIMO-OFDM-Based air interface
2005
IEEE Communications Magazine
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in a multiple-input multiple-output OFDM system. ...
We focus on various research topics for the MIMO-OFDM-based air interface, including spatial channel modeling, MIMO-OFDM transceiver design, MIMO-OFDM channel estimation, space-time techniques for MIMO-OFDM ...
Similarly, MIMO-OFDM is also sensitive to Doppler shift and carrier frequency offset that destroy orthogonality of subcarriers and give rise to ICI. ...
doi:10.1109/mcom.2005.1381875
fatcat:4ejszgcndfafdl7b45hpn6z63u
Distributed Randomized Space-Time Coding for HF Transmission
2006
MILCOM 2006
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(MIMO) systems and, therefore, to maximize link reliability, to increase communication range for a given throughput and power or, to increase throughput for a given range and power. ...
We propose an approach that enables increased range and throughput in over-the-horizon (OTH) High Frequency (HF) communications using a novel physical layer node cooperation scheme. ...
SPACE-FREQUENCY OFDM Orthogonal frequency division multiplexing (OFDM) is a practical alternative to single-carrier techniques for communication over frequency-selective channels. ...
doi:10.1109/milcom.2006.302521
fatcat:rewfwtglwjc3pbg7r7ckji4a3a
A Technique for Multi-User MIMO using Spatial Channel Model for out-door environments
[article]
2018
arXiv
pre-print
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Secondly coded (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) MIMO-OFDM system has been implemented using multipath Rayleigh faded channel and realistic Spatial Channel Model ...
Different BER improvement techniques are used such as, Viterbi-decoder, Time and Frequency inter-leaving. ...
4 . 1 : 41 Detailed Block diagram of STBC MIMO-OFDM system
Figure 4 . 2 :H 42 Schematic Diagram of STBC MIMO-OFDM System Following equations express the OFDM transmitted signal for a OFDM-MIMO system ...
arXiv:1807.03644v1
fatcat:4rpngxzvsfhjpmg3yooizsgvxi
Timing and carrier synchronization in wireless communication systems: a survey and classification of research in the last 5 years
2016
EURASIP Journal on Wireless Communications and Networking
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Considering both single-carrier and multi-carrier communication systems, we survey and categorise the timing and carrier synchronization techniques proposed for the different communication systems focusing ...
Carrier synchronization is the process by which a receiver adapts the frequency and phase of its local carrier oscillator with those of the received signal. ...
MB-OFDM UWB Multiband OFDM (MB-OFDM) approach for UWB is based on multiple OFDM bands each with at least 500-MHz bandwidth and each OFDM band comprising multiple sub-carriers. ...
doi:10.1186/s13638-016-0670-9
fatcat:xqzvzx4trrgdnbw2sde5gjoisa
OFDM and Its Wireless Applications: A Survey
2009
IEEE Transactions on Vehicular Technology
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We address basic OFDM and related modulations, as well as techniques to improve the performance of OFDM for wireless communications, including channel estimation and signal detection, time-and frequency-offset ...
Index Terms-Channel estimation, frequency-offset estimation, intercarrier interference (ICI), multicarrier (MC), multipleinput-multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) , ...
Single-carrier frequency-domain multiple access(SC-FDMA) [142] is a multiple-access scheme based on SC-FDE, whereas OFDMA is a multiple-access technique utilizing OFDM. ...
doi:10.1109/tvt.2008.2004555
fatcat:6ix76lfrk5emhgozbhvdricj6m
A Simple Quasi-Orthogonal Space-Time Scheme For Use In Asynchronous Virtual Antenna Array Enabled Cooperative Networks
2008
Zenodo
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In recent years many schemes have utilized the simple encoding and maximum-likelihood (ML) decoding of STBCs in a distributed framework to implement cooperative diversity, for systems where it may not ...
Receive diversity techniques for combating fading are well established [1] ; however in the last decade transmit techniques in the form of space-time block codes (STBCs) pioneered by Alamouti [2] have ...
doi:10.5281/zenodo.41119
fatcat:7licykraorayvfuisfckalxlvu
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