Low‐complexity companding function design for PAPR reduction in OFDM systems

Xing, Zhitong; Liu, Kaiming; Liu, Yuanan

doi:10.1049/iet-com.2019.0812

Cited by 14 publications

(5 citation statements)

References 19 publications

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“…The table of PAPR value and PAPR reduction will be created for analysis in the fourth step. The following are the PAPR-lowering formulas: (7) SLM OFDM, Green OFDM, or Green OFDM version 2 are the available OFDM techniques. The subcarriers, N, must be changed to 32 to analyze OFDMs with varied subcarrier counts while keeping the same number of IFFTs, U, and symbols.…”

Section: Fig 2 Flowchart Of Data Acquirement and Analysis Methodsmentioning

confidence: 99%

An Improved PAPR Reduction Scheme using Green OFDM

Aeizaal Azman Abdul Wahab,

Nur Qamarina Muhammad Adnan,

Syed Sahal Nazli Alhady

et al. 2024

ARASET

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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.

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Section: Fig 2 Flowchart Of Data Acquirement and Analysis Methodsmentioning

confidence: 99%

An Improved PAPR Reduction Scheme using Green OFDM

Aeizaal Azman Abdul Wahab,

Nur Qamarina Muhammad Adnan,

Syed Sahal Nazli Alhady

et al. 2024

ARASET

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“…The MLDD decrypting algorithm works as an error detection and correction method with fewer amounts of iterations than the majority logic decoder (MLD) method. The MLDD decoder is only dedicated for binary codes [18]. The majority based deciphering technique can be chosen to detect the original decoding data.…”

Section: Mldd Algorithmmentioning

confidence: 99%

A hybrid soft bit flipping decoder algorithm for effective signal transmission and reception

Hussain

Babu²,

Hasan

et al. 2022

TELKOMNIKA

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The Euclidean geometry (EG) based low-density parity check (LDPC) codes are enciphered and deciphered in various modes. These algorithms have the back-and-forth between decoding delay, and power usage, device unpredictability resources, and error rate efficacy are all available with these methods. As a result, the goal of this paper is to develop a comprehensive method to describe both soft and burst error bits for optimal data transfer. As a result, for EG-LDPC codes, a hybrid soft bit flipping (HSBF) decoder is suggested, which decreases decoding complications while improving message data transfer. A simulation model is formed using Xilinx synthesis report to study decoding latency, hardware usage, and power usage. A HSBF decoder is used in this paper, which accepts a 64-bit coding sequence and assigns 64 Adjustable nodes to it. It checks all customizable cluster connections and quantifies adjustable node values and actions. As a consequence of the data collected, our simulation model demonstrates that the HSBF technique outperforms soft bit flipping (SBF) algorithms. As a result, the techniques are ideal for usage in intermediate applications and as well as in cyber security processing technologies, medical applications.

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“…Equation (30) tells that decompanding operation at the receiver amplifies channel noise 𝜐 m to 𝜐 m 𝜃 . The equivalent noise obtained by no decompanding (NDC) is a combination of companding noise q m and channel noise 𝜐 m .…”

Section: 7mentioning

confidence: 99%

Performance evaluation of hybrid transform for universal filtered multi‐carrier system

Chintala¹,

Suddapalli²,

Anuradha

2022

Trans Emerging Tel Tech

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High peak to average power ratio (PAPR) is viewed as a serious limitation of all multi‐carrier systems. In this article, a companding transform with clipping technique is proposed for universal filtered multi‐carrier (UFMC) system. The proposed companding transform successfully reduces the PAPR by expanding the small amplitude signals and compressing the peak amplitude signals. Moreover, the combination of companding and clipping further reduces the PAPR. Besides, the proposed scheme provides more flexibility by properly selecting companding parameters and clipping ratio (CR). Additionally, this article presents the performance evaluation of various nonlinear companding transforms (NCTs) of the UFMC system in terms of PAPR reduction, bit‐error‐rate, and reduced out‐of‐band emissions. Simulation results confirm that the proposed hybrid transform provides superior system performance when compared to other NCTs. The proposed hybrid transform with CR of 1.4 provides superior PAPR diminution of 8.5 dB and net gain of 8.9 dB when compared to other schemes. Finally, the proposed hybrid transform is validated by using wireless‐open access‐research platform over real time channel.

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Low‐complexity companding function design for PAPR reduction in OFDM systems

Cited by 14 publications

References 19 publications

An Improved PAPR Reduction Scheme using Green OFDM

An Improved PAPR Reduction Scheme using Green OFDM

A hybrid soft bit flipping decoder algorithm for effective signal transmission and reception

Performance evaluation of hybrid transform for universal filtered multi‐carrier system

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