PAPR Reduction Techniques Research Articles

Impact of Hybrid PAPR Reduction Techniques on FBMC for 5G Applications

Impact of Hybrid PAPR Reduction Techniques on FBMC for 5G Applications

Examination of Different PAPR Minimization Techniques for MIMO-OFDM System

In this article an analysis on different PAPR minimizing schemes for MIMO-OFDM based wireless communication systems like clipping, selective mapping (SLM) and Partial Transmit Sequence (PTS) are presented. Several properties of OFDM maintain an appealing modulation scheme to support huge data rates in MIMO-OFDM based transmission used in wireless communication system. Apart from several advantages one principle drawback of the OFDM system is it produces huge values of PAPR. The PAPR can be minimized using few schemes like clipping, coding, peak windowing and tone reservation. Simulation results can give the examination between the different PAPR reduction techniques and can give the scope for analyze the different techniques based on different parameters like CCDF values and BER performance with respect to the variation in number sub carriers used for transmission However, huge number of these plans are not able to give a huge degradation in the PAPR by a low computational complexity, but the SLM technique provides essentially better attainment than the other schemes for MIMO-OFDM systems.

Performance Improvement of OFDM Systems by Reducing Papr using SLM-Grasshopper Optimization

Orthogonal Frequency Division Multiplexing (OFDM) is an emerging technology which is been most commonly used for transmission of data in wireless based systems. The OFDM technique is capable of achieving more speed i.e it has higher data rate transmission which is reliable and efficient. Peak power is the major drawback while transmitting the signal which is termed as PAPR. The signals achieves high peak value while transmitting due to the presence of large subcarriers which are independent in nature. The amplitude of the signal need to be reduced. Many PAPR reductions schemes have been presented in past and the reduction is done to some extents. In this paper , a new optimisation technique i.e grasshopper optimization (GOA) is proposed. The optimization technique is combined with one of the efficient PAPR reduction technique i.e selective mapping technique. The combination of SLM-Grasshopper help in reducing the PAPR as low as possible and is also compared with other techniques like SLM-GA, SLM-FA and SLM-GWO. The experimental results are performed using matlab.

Novel Technique For PAPR and Average Power Reduction In OFDM Scheme

Novel Technique For PAPR and Average Power Reduction In OFDM Scheme

Low Complexity Joint PAPR Reduction and Demodulation Technique for OFDM Systems

In this paper, we derive a novel, low-complexity, joint peak-average-power-ratio (PAPR) reduction and demodulation technique for orthogonal frequency division multiplexing (OFDM) systems. The method exploits the properties of the discrete Fourier transform (DFT) matrix to reconstruct the thresholded samples at the receiver. The signal processing required at the transmitter side is very low. The technique gives an impressive reduction in PAPR value with good bit error rate (BER) performance compared to existing methods and also incorporates an efficient demodulation scheme for OFDM. We have also developed a new time-domain method for transmitting side information implicitly along with the transmitted data. Performance advantages of the proposed method are substantiated through extensive computer simulation studies and are compared with that of well-known prevailing methods.

ACE-PI: PAPR Reduction in OFDM Systems Using Constellation Extension with Peak Insertion

In this study, a proposal is offered in order to calculate the Bit Error Rate with the Signal to Noise Ratio. Here in this paper, it is illustrated that by comparing this analysis among the other mechanisms effective results can be obtained. By applying the ACE scheme in which the clipping technique block is replaced with Peak Inversion (PI) and butter worth band-pass filter is added after the ACE constraint block for generating less distortion and more smoothing. As, it has been concluded from a survey that among different PAPR reduction techniques, PI found to be an effective technique which can reduce PAPR to an extent by incorporating a relatively high impulse. The MATLAB is used for analyzing the enhanced ACE scheme that offers better results in terms of both PAPR and BER.

A novel approach for reducing complexity in the SLM-GFDM system

The flexible nature of generalized frequency division multiplexing (GFDM) leads to superimposition of multiple subsymbols in time domain, the consequence of which is high PAPR. Selective mapping (SLM) is one of the prominent PAPR reduction techniques in GFDM, which uses bank of modulation matrices to generate a set of alternative signal representations. This procedure increases the complexity of the GFDM system enormously. In this paper, we utilize the concepts of conversion matrices and linearity to achieve low complexity with respect to the modulation matrices in the conventional SLM method. By using the proposed conversions we evolve at three modified SLM schemes which have much lower complexity. The first method uses the principle of linearity and two GFDM signals to generate the set of candidate signals while the second one uses only one GFDM signal along with conversion matrix. By adhering the advantages of two methods, the third method adds the concept of shifting matrix, which is an effective solution for tradeoff between PAPR performance and computational complexity. The obtained simulation results indicate that, when compared to conventional SLM scheme, the first proposed approach has inferior PAPR reduction performance, whereas, second and third proposed methods almost reach the performance of the conventional SLM scheme.

Investigation of PAPR Reduction Technique Using TRC-SLM Integration

Investigation of PAPR Reduction Technique Using TRC-SLM Integration

Optimisation of PTS technique for PAPR reduction in MIMO-OFDM-based CRNS

In CRNs, the available spectrum has to be shared between various users, OFDM has a feature that supports multiuser access by assigning subcarriers to different users. In wireless transmissions, PAPR is the key challenge in OFDM that affects the BER. In this paper, the main focus is on PTS. The drawback of existing PTS technique is that the number of multiplications of IFFT sub-sequences with the phase vectors required in it are very high. To reduce computational complexity, optimisation is performed. BPSO is used to find optimised phase vector. This phase vector will be one having reduced PAPR. The purpose is to find out the absolute convergence of MIMO multiplexing to reduce the internal phase to phase PAPR in cognitive radio based networks. Results show that in case of PTS-BPSO error reduces at higher rate with less PAPR. BER is reduced at different SNR values as compared to conventional approach.

Optimisation of PTS technique for PAPR reduction in MIMO-OFDM-based CRNS

In CRNs, the available spectrum has to be shared between various users, OFDM has a feature that supports multiuser access by assigning subcarriers to different users. In wireless transmissions, PAPR is the key challenge in OFDM that affects the BER. In this paper, the main focus is on PTS. The drawback of existing PTS technique is that the number of multiplications of IFFT sub-sequences with the phase vectors required in it are very high. To reduce computational complexity, optimisation is performed. BPSO is used to find optimised phase vector. This phase vector will be one having reduced PAPR. The purpose is to find out the absolute convergence of MIMO multiplexing to reduce the internal phase to phase PAPR in cognitive radio based networks. Results show that in case of PTS-BPSO error reduces at higher rate with less PAPR. BER is reduced at different SNR values as compared to conventional approach.

ZCT Precoding Based SLM Technique for PAPR Reduction

ZCT Precoding Based SLM Technique for PAPR Reduction

Analyzing the Impact of Diverse PAPR Reduction Techniques on BER Performance of OFDM System

Analyzing the Impact of Diverse PAPR Reduction Techniques on BER Performance of OFDM System

A Brief review on different PAPR reduction techniques in OFDM communication

A Brief review on different PAPR reduction techniques in OFDM communication

Effect of PAPR reduction techniques on BER Performance of OFDM System

Effect of PAPR reduction techniques on BER Performance of OFDM System

APR Reduction Technique based on OFDM Pilot Filter Bank Limiting for Satellite Mobile Communications

Combined with OFDM (Orthogonal Frequency Division Multiplexing), satellite mobile communications will effectively achieve on-demand communication in areas with an ultra-low density of users. With OFDM multiple access optimization, the bandwidth utilization efficiency can be increased by 5 to 10 times. However, satellites are power-constrained systems, so higher PAPR requires greater power backoff, resulting in a decline in satellite transmission capacity. To use OFDM technology in satellites, there are problems such as reduced transmission capacity resulted from high PAPR, complication of lowering PAPR, and difficulty in hardware implementation. In order to deal with the problem of high bit error rate and hardware implementation difficulties in PAPR reduction technique of non-orthogonal frequency division multiplexing, this paper proposes a limiting PAPR reduction technique with OFDM pilot filter banks for satellite mobile communications. Firstly, the applicability of OFDM in satellite mobile communications is analyzed, and the influence of high PAPR on satellite power utilization and the influence of frequency shift sensitivity on inter-satellite communication interference are obtained. Then design the PAPR reduction technique based on the pilot filter bank. By setting the tunable filter bank to the pilot, the sideband power suppression in the OFDM frequency domain is realized, and the PAPR of the OFDM signal is reduced. Finally, the experimental results show that the PAPR performance is improved by 3dB without reducing the bit error rate.

A Survey on Peak to Average Power Reduction Techniques for OFDM Systems

Orthogonal frequency division multiplexing (OFDM) is basically a multiple carrier communication technique which has several applications in the wireless communication because of high spectral efficiency. The major challenge faced by OFDM systems is its high value of peak-to-average power ratio often termed as PAPR. The high value of PAPR forces the operation of high power amplifiers to shift out of the non-linear region, thereby causing non-linear distortion. Moreover, amplifiers with a large linear region can't be used for the high power consumption. Therefore, reducing the PAPR becomes mandatory. This paper introduces different PAPR reduction techniques along with their pros and cons. A comparative analysis is also made among them based on the bit error rate, power increase and computational complexity. Thus, the paper paves the path for future researchers to embark upon developing an effective PAPR reduction mechanism based on the insights provided herein.

PAPR Reduction in MIMO-OFDM System Using SLM Without SI

AbstractMIMO-OFDM is a key technology being widely used these days for 4 G communication systems but its main drawback is high PAPR. Selected mapping is commonly used approach for PAPR reduction but in SLM there is requirement of side information (SI) to be sent along with the input data signal and leading to the loss in data rate and increased complexity. In this article, we have come up with a technique for PAPR reduction in which there is no requirement of transmission of side information and therefore preserves the data rate and also provides sufficient reduction in the PAPR. In this technique, SI embedding is performed in the form of subcarrier location (index) by increasing its power. The simulation results demonstrate that the scheme which has been proposed provides the favorable response in terms of bit error rate (BER), PAPR reduction and SI detection capability.

Research on modified selected mapping technique for PAPR reduction and reception performance improvement in 8QAM-OFDM optical access systems

BackgroundOrthogonal frequency division multiplexing has been regarded as one of the promising technologies for the optical access systems application. However, high peak-to-average power ratio will cause the signal distortion and enable the used amplifier to operate in nonlinear section.MethodsIn this paper, a modified selected mapping technique is introduced for reducing the peak-to-average power ratio and enhancing reception performance of the downstream 8QAM-OFDM signals in optical access systems.ResultsCompared with the traditional selected mapping technique, the PAPR value of 8QAM-OFDM optical downstream signals with 128 subcarriers is reduced by almost 2 dB using modified SLM when the complementary cumulative distribution function probability value is 10−2. Moreover, the bit error rate performance will be improved, while 10Gbit/s 8QAM-OFDM optical downlink signals are transmitted over single mode fiber with different access length.ConclusionsHence, the proposed scheme becomes more efficient for the future optical orthogonal frequency division multiplexing access systems.

Effect of PAPR reduction techniques on BER Performance of OFDM System

Effect of PAPR reduction techniques on BER Performance of OFDM System

Power Enhancement Techniques of 5G

This new era is emerging towards the fast telecommunication technologies and this paper here is also explaining the newest technologies that are 4G & 5G and their evolution from the different projects working all over the world. Every forum uses different frequency band in GHz. Although here this paper will discuss the main issue of 5G technology and that is the power issue. FBMC as the main 5G technology aspirant and this also suffers from the problem of power which is being composed by the term PAPR ratio. PAPR reduction techniques like DSLM is used and the paper proposes this as the superior technique for improving the PAPR by deep scrutiny .