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A Combined Selective Mapping And Closed-Loop Quasi-Orthogonal Space Time Block Coding Scheme For Peak-To-Average Power Ratio Mitigation In Mimo-Ofdm Transmission
2008
Zenodo
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For such a system the length N transmit OFDM frame corresponding to the i th time-domain symbol is given by [10] x i [n] = 1 √ N N−1 ∑ k=0 c i [k]e j2πkn/N , 0 ≤ n ≤ N − 1 (1) where j = √ −1, c i [k] ...
In this proposed combined scheme, we transmit the SI bits over two symbols in the OFDM frame. ...
doi:10.5281/zenodo.40872
fatcat:qfynsflzibf63ietlyxrgtpbba
Peak-to-average power ratio mitigation in quasi-orthogonal space time block coded MIMO-OFDM systems using selective mapping
2008
2008 Loughborough Antennas and Propagation Conference
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Peak-to-average power ratio mitigation in quasi-orthogonal space time block coded MIMO-OFDM systems using selective mapping. ...
Peak-to-average power ratio mitigation in quasi-orthogonal space time block coded MIMO-OFDM systems using selective mapping. Citation: ALHARBI, F.S. and CHAMBERS, J.A., 2008. ...
2, 3, 4 denote the complex valued time-domain transmitted symbols and c i,n = [S i ] n is the complex symbol of transmitter i at the n th subcarrier in the frequency domain. ...
doi:10.1109/lapc.2008.4516890
fatcat:4t43iqs4v5dqlo6uvhsgnywoii
On the Fast DHT Precoding of OFDM Signals over Frequency-Selective Fading Channels for Wireless Applications
2022
Electronics
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High power consumption in OFDM systems is motivated by the high peak-to-average power ratio (PAPR) introduced by the inverse Fourier transform (IFFT) processing kernel in the time domain. ...
Linear precoding of the symbols in the frequency domain using discrete Hartley transform (DHT) could be used to minimise the PAPR problem, however, at the cost of increased complexity and power consumption ...
realize the time-domain contents of an OFDM symbol. ...
doi:10.3390/electronics11193099
fatcat:hs56dwsr4vej7fsrldbewxntpm
Novel companding technique for PAPR reduction in OFDM system
2014
International Conference on Recent Advances and Innovations in Engineering (ICRAIE-2014)
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In order to minimize OOB power emission, we combine precoding in frequency domain and gamma companding technique in time domain. The gamma compander promotes OOB power emission. ...
Hence it is mandate to research on the characteristics of the PAPR in association with its distribution and reduction in OFDM systems. ...
Existing scheme for PAPR reduction
Precoding technique Let X be an input OFDM symbol with N subcarriers. ...
doi:10.1109/icraie.2014.6909240
fatcat:nbifclqg4fbgroewkvkyqe7kou
Combination of Modified Clipping Technique and Selective Mapping for PAPR Reduction
2016
International Journal Of Engineering And Computer Science
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Although OFDM has advantages over traditional communication models but it frequently suffers from PAPR. ...
PAPR is concerned area in OFDM from two decades and vast amount of research is carried out in literature. ...
The important factors used to mitigate
PAPR impact in OFDM modulation scheme are
reserved tones locations, complexity levels, reserved
tones power and number of reserved tones. ...
doi:10.18535/ijecs/v5i9.10
fatcat:p3p2waedzzbodcl6adkafenheu
PAPR reduction in OFDM system with Wavelet transformation and partial transmit sequence technique
2017
Journal of Advances in Technology and Engineering Research
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One of the drawbacks of OFDM is the high value of Peak to Average Power Ratio (PAPR). High PAPR values will mitigate the ef icacy of the power ampli ier. ...
The proposed Wavelet-PTS system reduces the PAPR signi icantly, which can achieve a reduction of 8 dB PAPR compared with the conventional OFDM system. ...
The aim is optimal combination of sub-blocks in order to get to get time domain OFDM signals. Fig. 4 . Block image Wavelet-PTS structure
V. SIMULATED FINDINGS OF EXPERIMEN
A. ...
doi:10.20474/jater-3.1.1
fatcat:p6zedseaazck3j3mpbqriok6uu
An Efficient Performance of OFDM-Shaped Symbol for 5G Green Communication Compared to FBMC
2020
Advances in Science, Technology and Engineering Systems
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In a previous work symbol time compression (STC) -Shaped system was proposed for the OOB power reduction, PAPR reduction, ISI reduction and removes the extension of cyclic prefix (CP). ...
As the windowing concept is applied to mitigate OOB, PAPR, ISI and ICI problems, it is implemented on overall symbol of the proposed scheme. ...
Therefore, the time varying channel deteriorates the BER performance of OFDM systems. ICI mitigation schemes for high mobility OFDM systems can be classified into two categories. ...
doi:10.25046/aj0506140
fatcat:udx6nazqrjgyxppc4hhwyb3blm
New scheme for PAPR reduction in FBMC-OQAM systems based on combining TR and deep clipping techniques
2021
International Journal of Power Electronics and Drive Systems (IJPEDS)
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In this paper, we suggest a serial combination of tone reservation (TR) method with an enhanced version of clipping called deep clipping (DC) method (TR&DC) to enhance the peaks (PAPR) mitigation in FBMC-OQAM ...
Tone reservation (TR) is a method designed to solve this problem by reserving several subcarriers called tones in the frequency domain to generate a cancellation signal in the time domain to eliminate ...
national project with technological development and socioeconomic impact under code N°13-2019-DGRSDT/Univ Tlemcen, entitled: contribution to the spectral and energetic efficiency of 5G communications systems ...
doi:10.11591/ijece.v11i3.pp2143-2152
fatcat:pubzsqij3zfbtgeeasn6dzjlve
PAPR Reduction in MIMO-OFDM Using Modified PTS Scheme With Hybride ABC-FF Algorithem
2018
International Journal of Engineering & Technology
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In this paper a new optimized Partial Transmit Sequence (PTS) scheme and SLM for PAPR reduction in MIMO-OFDM have been proposed. ...
OFDM can be clubbed with antenna arrays at the transmitter and receiver to increase diversity gain to enhance the system capacity on time variant and frequency selective channels, resulting in (Multi input ...
Now for further reduction of PAPR, this combination of phase sequence and input data to PTS scheme which further reduce the PAPR. ...
doi:10.14419/ijet.v7i4.5.20196
fatcat:f3fqaqsawna3xh2bhqffxse25u
Sparse Index OFDM Modulation for IoT Communications
2020
IEEE Access
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Among these approaches, the low complex clipping method has been selected in most of the practical OFDM systems for PAPR issue mitigation. ...
As a future work, the possibility of utilizing the proposed scheme for other OFDM system through guaranteeing the sparsity in other domains in addition to time domain can be investigated. ...
doi:10.1109/access.2020.3024157
fatcat:keb5qi3d7na5zcu4zzefzthgbu
A Low-Complexity SLM Scheme Using Additive Mapping Sequences for PAPR Reduction of OFDM Signals
2011
IEEE transactions on broadcasting
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Similarly, a low-complexity SLM scheme is proposed for multi-input multi-output (MIMO) OFDM system with space-frequency block code (SFBC). ...
The selected mapping (SLM) scheme is one of the well-known peak-to-average power ratio (PAPR) reduction schemes for orthogonal frequency division multiplexing (OFDM) systems. ...
Low-Complexity SLM Scheme for MIMO-OFDM The low-complexity SLM scheme proposed in Section IV-A can be extended to the MIMO-OFDM system. ...
doi:10.1109/tbc.2011.2151570
fatcat:tdtmesjoo5erfcvqidthb7afem
Performance Analysis of PAPR and LS Estimation in OFDM Systems
2014
IEIE Transactions on Smart Processing and Computing
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Therefore some trade-off between the number of subcarriers and the performance of the OFDM system is needed. ...
A High Peak-to-Average Power Ratio (PAPR) is one of the major downsides of the OFDM. ...
This is another advantage of OFDM over single carrier communications systems, which use complex equalization schemes for ISI mitigation [4] . ...
doi:10.5573/ieiespc.2014.3.3.135
fatcat:fpwhra6uv5b6tbcrdwu4o5tkui
Computational Complexity and Peak-to-Average Power Ratio Reduction of OFDM Signals by PTS with Sub optimum Grouping Phase Weighting Method
2013
International Journal of Computer Applications
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Partial Transmit Sequence (PTS) is a promising technique to reduce Peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. ...
However optimum PTS (OPTS) needs exhaustive search over all combinations of allowed phase weighting factors. It results in high computational complexity. ...
The objective of this approach is to optimally combine the subblocks to obtain the time domain OFDM signals with the lowest PAPR. ...
doi:10.5120/13783-1728
fatcat:ruxo2blotncazduiodeknfc654
Analysis of GFDM as a Robust 5G Communication Technique in Noisy Environment
2020
2020 International Conference on Information Networking (ICOIN)
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Simulation results show that GFDM achieve lower PAPR and Symbol Error Rate (SER) and an average of 10.73 dB and 4.73 dB gain in Signal to Noise Ratio (SNR) in presence of IN and combined IN and NBI respectively ...
Numerous modulation schemes proposed for 5G communications are able to overcome these drawbacks. Generalised Frequency Division Multiplexing (GFDM) is one of them. ...
SYSTEM AND NOISE MODEL The transmitted OFDM signal in time domain is obtained by taking Inverse Fourier Transform of the frequency domain signal and is given as where X k denotes the frequency-domain signal ...
doi:10.1109/icoin48656.2020.9016552
dblp:conf/icoin/AyazA20
fatcat:6ng7knqye5enlb6yrx4zkzedli
An Efficient Hybrid PAPR Reduction for 5G NOMA-FBMC Waveforms
2021
Computers Materials & Continua
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Peak to Average Power Ratio (PAPR) is regarded as a significant issue in multicarrier waveforms. ...
The combination of Selective Mapping-Partial Transmit Sequence (SLM-PTS) is an effective way to minimize large peak power inclination. ...
Acknowledgement: The authors would like to thank for the support from Taif University Researchers Supporting Project Number (TURSP-2020/10), Taif University, Taif, Saudi Arabia and the Centre of Artificial ...
doi:10.32604/cmc.2021.019092
fatcat:bda5la6dabbh7g3nhucehe45sy
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