A Hybrid PAPR Reduction Technique in OFDM Systems

Nagaraju, V.; Anusha, Rapaka; Vallabhuni, Rajeev Ratna

doi:10.1109/wiecon-ece52138.2020.9398011

Cited by 14 publications

(10 citation statements)

References 17 publications

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“…In the domain of OFDM systems, numerous techniques have been devised to mitigate the problem of the PAPR, which is a widespread issue in these systems. Such techniques can be classified into signal distortion approaches, signal scrambling methods, and hybrid and coding techniques [ 79 , 80 ]. However, this survey focused specifically on signal distortion approaches and signal scrambling methods.…”

Section: Classical Papr Reduction Approachesmentioning

confidence: 99%

A Survey of PAPR Techniques Based on Machine Learning

da Silva,

Souto,

Souza

et al. 2024

Sensors

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Orthogonal Frequency Division Multiplexing (OFDM) is the modulation technology used in Fourth Generation (4G) and Fifth Generation (5G) wireless communication systems, and it will likely be essential to Sixth Generation (6G) wireless communication systems. However, OFDM introduces a high Peak to Average Power Ratio (PAPR) in the time domain due to constructive interference among multiple subcarriers, increasing the complexity and cost of the amplifiers and, consequently, the cost and complexity of 6G networks. Therefore, the development of new solutions to reduce the PAPR in OFDM systems is crucial to 6G networks. The application of Machine Learning (ML) has emerged as a promising avenue for tackling PAPR issues. Along this line, this paper presents a comprehensive review of PAPR optimization techniques with a focus on ML approaches. From this survey, it becomes clear that ML solutions offer customized optimization, effective search space navigation, and real-time adaptability. In light of the demands of evolving 6G networks, integration of ML is a necessity to propel advancements and meet increasing prerequisites. This integration not only presents possibilities for PAPR reduction but also calls for continued exploration to harness its potential and ensure efficient and reliable communication within 6G networks.

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Section: Classical Papr Reduction Approachesmentioning

confidence: 99%

A Survey of PAPR Techniques Based on Machine Learning

da Silva,

Souto,

Souza

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

“…The PAPR of the OFDM symbol is defined as the ratio between the maximum power of the OFDM symbol and the average power of the OFDM symbol [18]. The PAPR of the OFDM sequence x[n], which we denote as PAPR{x[n]}, can be defined in Eq.…”

Section: ) Peak To Average Power Ratio (Papr)mentioning

confidence: 99%

The Effect of High-Speed Train Channel on the Performance of DVB-Terrestrial Communication Systems

2024

IJIES

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The high mobility associated with high-speed train (HST) results in nonstationary channel conditions that characterized by varying environments leads to challenges like rapid changes in signal strength and quality. As train speeds increase, the Doppler shift occurs and the Peak to Average Power Ratio (PAPR) in the system also increases, which is a common challenge in modulation schemes such as Orthogonal Frequency Division Multiplexing (OFDM). The paper investigates the impact of HST environments on the performance of Digital Video Broadcasting -Terrestrial (DVB-Terrestrial) systems. It primarily focuses on OFDM and evaluates various performance metrics like Bit Error Rate (BER), Complementary Cumulative Distribution Function (CCDF), PAPR, and the 64-QAM constellation diagram in different HST speeds. The study includes a comprehensive analysis of the HST channel and its integration with the DVB-Terrestrial system. Key findings demonstrate how higher speeds result in increased PAPR values and changes in the 64-QAM constellation diagram, indicating the necessity for robust power amplifiers and efficient symbol detection methods. The paper also shows that while higher HST speeds generally lead to worse BER values, the performance of channel coding can mitigate this effect to some extent. The research provides significant insights for optimizing DVB-Terrestrial communication systems in HST environments, highlighting the importance of channel coding and modulation in maintaining signal quality and system efficiency.

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“…These filters provide the linear model, inverse model of the unknown system and predict the present value of the random signal. [16][17][18][19][20][21][22][23][24][25] They can be designed as FIR or IIR filters. The adaptive FIR is more preferred because of its stability and easy updating of the filter coefficients.…”

Section: Introductionmentioning

confidence: 99%

Digital Filter based Adder Module Realization High-Speed Switching Functions

2023

VLSI

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FIR filter bank play a vital role in any signal processing systems. The FIR filter is used to implement any frequency response digitally. Usually, the FIR filters contain multipliers, adders and many delays. As we know, the number of MAC operations (multiply and accumulate) makes the FIR filter less efficient and increases hardware complexity. So in this project, we included DA (Distributed Arithmetic) architecture in designing the efficient adaptive FIR filter. The pipelined Distributive Arithmetic architecture provides less power, less area and high values of throughput in creating an adaptive FIR filter. These are used in Echo cancellations, Radio channel equalizers and speech coding. DA architecture also helps in improving the processing speed of the FIR filter by eliminating the number of multipliers. A reconfigurable filter design can be achieved with the help of this Distributive Arithmetic architecture. Here the sum of the partial products which is pipelined is passed as the input values, and it is stored in the LUT (lookup tables) of the distributive architecture. By replacing the adder of the shift accumulation unit with a carry-save adder, the area of the proposed design is reduced. By placing the ripple carry adder, the size and delay are reduced to a further extent. Here we will use the Xilinx ISE tool to verify the simulation result, area required and time consumed.

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A Hybrid PAPR Reduction Technique in OFDM Systems

Cited by 14 publications

References 17 publications

A Survey of PAPR Techniques Based on Machine Learning

A Survey of PAPR Techniques Based on Machine Learning

The Effect of High-Speed Train Channel on the Performance of DVB-Terrestrial Communication Systems

Digital Filter based Adder Module Realization High-Speed Switching Functions

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