PAPR Reduction Scheme Research Articles

A comprehensive analysis of dynamic PAPR reduction schemes in MIMO-OFDM systems

<span>In <span>this paper, an attempt develops three different methods, namely, Hybrid Maximal-Minimum (Max-Min) model with Decomposed Selective Mapping (D-SLM) in a UFMC, Modified Enhancement Asymmetric Arithmetic Coding Scheme (M-EAAC) and Dynamic Threshold-based Logarithmic Companding (DTLC) is carried out in Multiple-Input, Multiple-Output Orthogonal Frequency-Division Multiplexing (MIMO-OFDM) technology to enhance the PAPR reduction. These methods allow increased data rate request through threshold limit adjustment in a desired out-of-band (OOB) range, allows data transmission for the selected for the candidate sequences for maximizing the channel utility, data capacity and computational demands and varying threshold limit to analyse the nonlinear companding effect, respectively on D-UFMC-SLM, M-EAAC SCS-TI and DTLC. The extensive analysis shows that the proposed M-EAAC SCS-TI achieves a reduced CCDF PAPR, increased average spectral efficiency and redued Bit Error Rate (BER) than the other proposed DTLC and D-UFMC-SLM methods.</span></span>

An efficient PCCM masking scheme for PAPR reduction and encryption in OFDM-VLC system

An efficient PCCM masking scheme for PAPR reduction and encryption in OFDM-VLC system

An Improved PAPR Reduction Scheme using Green OFDM

OFDM has become popular method to be applied in data communication as it has high data rate. Selective Mapping OFDM (SLM OFDM) is introduced to over-come the OFDM’s disadvantage which is high PAPR. SLM OFDM offers PAPR reduction by selecting OFDM waveform with the lowest PAPR among many copies of waveform candidates, U. As the world become more digitalized and demanding, Green OFDM shows up with more candidates, U^2/4, without making computation more complex. More candidates will promote more choices with lower PAPR values compare to the SLM OFDM. In the recent years, re-searchers have come out with a new improved Green OFDM version 2 with more waveform candidates to be chosen, U^2. The improved Green OFDM ver-sion 2 scheme will produce lower PAPR values compare to the SLM OFDM and the original Green OFDM. Thus, technologies with higher data transmission are able to be created.

On the Design of Companding-Based Scheme for PAPR Reduction in OFDM Systems

On the Design of Companding-Based Scheme for PAPR Reduction in OFDM Systems

Hybrid PAPR reduction schemes for different OFDM-based VLC systems

Hybrid PAPR reduction schemes for different OFDM-based VLC systems

A complexity efficient PAPR reduction scheme for FBMC-based VLC systems

A complexity efficient PAPR reduction scheme for FBMC-based VLC systems

A Permutated Partial Transmit Sequence Scheme for PAPR Reduction in Polar-Coded OFDM-IM Systems

A Permutated Partial Transmit Sequence Scheme for PAPR Reduction in Polar-Coded OFDM-IM Systems

FPGA Implementation of a Phase Optimizer-Assisted PTS Scheme for PAPR Reduction in OFDM Systems

This article proposes a phase optimizer-assisted partial transmit sequence (PO-PTS) for minimizing PAPR values in OFDM systems. The novel PO-PTS scheme after validation, based on simulation results, is implemented using a Xilinx system generator on a field programmable gate array (FPGA). The phase optimizer (PO) module is employed to select optimal phase weighting factors to perform scaling with the data sequence in the PTS scheme. The computational complexity and the redundancy involved in producing the candidate signals are significantly reduced by the PO-PTS compared with the conventional PTS method. The proposed method reduces PAPR for a QPSK-OFDM signal by 56.16% compared to the original OFDM signal without compromising on the bit error rate (BER) performance. In addition, the performance of PO-PTS in terms of PAPR reduction for 32-QAM and 64-QAM modulated OFDM systems is also presented to justify the robustness of the proposed scheme. Moreover, when PO-PTS is implemented using FPGA, it uses only 1% of the hardware available in Virtex.

A Hybrid Precoded-Companding Scheme for PAPR Reduction in OFDM systems

A Hybrid Precoded-Companding Scheme for PAPR Reduction in OFDM systems

A novel PAPR reduction scheme based on nonlinear real-valued support vector regression for CO-OFDM systems

Coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems suffer from the high peak-to-average ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals, which leads to the back-off of laser power and fiber nonlinear effects, thereby deteriorating the bit error rate (BER) performance and limiting the transmission distance. Iterative clipping and filtering (ICF) scheme, as a direct, simple and effective PAPR reduction scheme that only processes signals at the transmitter, but requires multiple fast Fourier transform (FFT)/inverse fast Fourier transform (IFFT), resulting in high computational complexity. We propose a novel scheme using the machine learning (ML) technique, which is based on nonlinear real-valued support vector regression (NRSVR) and trained on ICF scheme. The simulation results show that compared with ICF scheme, the proposed scheme has a similar PAPR0 for 10−4 complementary cumulative distribution function (CCDF), an additional 15 km of single mode fiber (SMF) transmission for 16 dB optical signal-to-noise ratio (OSNR) and 10−3BER, and a significant time complexity reduction. Compared with other ML-based schemes, the proposed scheme also achieves better performance and lower computational complexity.

Concentric triangular mapping with iterative substitution method for PAPR reduction in OCDM system without SI

Abstract OCDM, a new MCM scheme, has been proposed in the literature. Like widely used OFDM, OCDM also has a drawback of high PAPR. PAPR reduction schemes like SLM and PTS require information about phase factors i.e. SI used at the transmitting end for PAPR reduction for recovery of original data signal at the receiver. Transmission and recovery of SI is always a concern. In this paper a new CTM-IS method has been proposed for PAPR reduction of OCDM signal without SI. Main objective of the proposed scheme is to improve the error performance of SI free SLM and PTS based schemes without any degradation in PAPR reduction. PAPR performance and SER performance, over AWGN as well as multipath Rayleigh fading channels, of OCDM signal with proposed CTM-IS scheme is evaluated. Analytical expression for SER of the proposed CTM-IS scheme over AWGN channel is also derived. The computational complexity of the proposed CTM-IS scheme is also presented. Performance of the proposed CTM-IS scheme is compared with the existing MSM combined with SLM (MSM-SLM), CCM combined with SLM (CCM-SLM) and OM combined with SLM (OM-SLM) schemes. The proposed CTM-IS scheme has demonstrated to offer a theoretical power gain of about 3.01 dB, 2.55 dB, and 14.23 dB over MSM-SLM, CCM-SLM and OM-SLM schemes, respectively. Proposed CTM-IS scheme provides better SER performance with respect to MSM-SLM, CCM-SLM and OM-SLM without any loss in the PAPR performance. Moreover, computational complexity of CTM-IS scheme is less than that of MSM-SLM and CCM-SLM schemes.

All-Pass Filters as a Low-Complexity PAPR Reduction Scheme for SC-FDMA System

All-Pass Filters as a Low-Complexity PAPR Reduction Scheme for SC-FDMA System

Low-complexity PAPR reduction scheme selective mapping cascading improved μ Law companding in CO-OFDM system

Low-complexity PAPR reduction scheme selective mapping cascading improved μ Law companding in CO-OFDM system

Maximal Minimum Hamming Distance Codes for Embedding SI in a Data based BSLM Scheme for PAPR Reduction in OFDM

Maximal Minimum Hamming Distance Codes for Embedding SI in a Data based BSLM Scheme for PAPR Reduction in OFDM

Early termination algorithm for SLM-based PAPR reduction schemes in OFDM systems

Early termination algorithm for SLM-based PAPR reduction schemes in OFDM systems

Chicken Swarm Optimization for PTS based PAPR Reduction in OFDM Systems

Partial transmit sequence (PTS) is a well-known PAPR reduction scheme for the OFDM system. One of the major challenge of this scheme is to find an optimal phase vector using exhaustive search over all the allowed phase factor combinations. This leads to increased search complexity which grows exponentially as the number of sub-blocks is increased. In this paper, chicken swarm optimization (CSO) based PTS system is designed that aims to find an optimal solution in less number of average iterations and therefore results in reduced computational complexity of the system. We have proposed two categories of the algorithm: (i) CSO-PTS system without threshold limit on PAPR (ii) CSO-PTS system with threshold limit on PAPR. Both the schemes offer effective trade-offs between the computationalcomplexity and the PAPR reduction capability of the system. Simulation results confirm that our proposed schemes perform well in terms of low computational complexity, lesser number of average iterations and improved PAPR reduction capability of the OFDM signal without any loss in BER performance of the system.

A Novel PTS Scheme for PAPR Reduction of Filtered-OFDM Signals without Side Information

A Novel PTS Scheme for PAPR Reduction of Filtered-OFDM Signals without Side Information

A Hybrid Scheme for Low PAPR in Filter Bank Multi Carrier Modulation

The demand for more bandwidth is increasing day by day due to explosive growth in data generated on account of services enabled on mobile phone, laptops and IOT devices. In the near future Internet for everything (IoE) technology where social media, processes, big data etc. will require internet connectivity all the times. Filter bank multicarrier with offset quadrature amplitude modulation system (FBMC/OQAM) is one of the promising techniques for next generation wireless communication system (5G). In FBMC-OQAM orthogonality condition is relaxed to obtain, better bandwidth utilization. This FBMC-OQAM is a multi-carrier transmission scheme where sub-carriers are independent to each other in time domain. The composite signal has large variation in amplitude, thus lead to peak to average power variation problem. This paper presents a FBMC scheme based on DFT spread and identically time shifted multicarriers (ITSM) conditions. In the chosen scheme DFT and IDFT is performed once and system behave as a nearly single carrier. This paper also deals with, PAPR reduction scheme. The chosen scheme is based on clipping and non-liner companding scheme, and obtained results are compared with recently proposed method.

Hybrid PS–GW optimised PTS scheme for PAPR reduction in OFDM system

The most famous and attractive strategy used in wireless communication for huge transmission of data with higher rate was orthogonal frequency division multiplexing (OFDM) approach. Efficient methods are important for PAPR reduction in high-speed wireless communication systems. The reduction of PAPR in OFDM system has been carried out with one of the most familiar approach called Partial transmit sequences (PTS). Various techniques are already presented for reducing the PAPR, some of them are, clipping, SLM, and PTS. From that PTS is considered as an efficient method because the PAPR was reduced by PTS without causing any signal distortion. In this work, PTS along with hybridization optimization algorithm named as PS–GW will be implemented to get the minimum performance on PAPR and computational complexity. The PS–GW is a combination of both the Particle Swarm Optimization (PSO) and Grey Wolf Optimizer (GWO) which search the optimal combination of phase rotational factors efficiently. A fundamental thought in this method was that the capacity of exploitation in PSO was enhanced with the capacity of investigation in GWO to create a two variations in quality. The results produced by this proposed method shows that the reduction was effectively determined in both PAPR and computational complexity.

A New Proposed Peak-to-Average Power Reduction Parameter to Evaluate SLM and PTS as MIMO-OFDM PAPR Reduction Schemes

All around, the top to-average ability amount (PAPR) of transmitted signs for MIMO-OFDM structures diminishes the arrangement accumulation and from this time advanced turns into the amount of the radio change (RF) ascendancy intensifier. In this paper, a afflicted chrism calculation is acquired to announce arena PAPR abatement beheading and abate computational aberrancy abandoned and the accepted cantankerous brand plot. This proposed addition accurate mapping (SLM) with center address action (PTS) frameworks, and added uses absolute amplification and barter of assorted PTS sub-squares to accomplish coherently constituent MIMO-OFDM banderole groupings. Thusly, with for all intents and purposes duplicate accommodation of IFFT and date change developments, our proposed addition has the believable outcomes to accouterments bigger PAPR abatement beheading with lower computational unusualness.