Results 41 to 50 of about 2,477 (201)
The Journal of Engineering, Volume 2019, Issue 5, Page 3460-3468, May 2019., 2019 Partial transmit sequence (PTS) is one of the effective techniques for reducing the peak‐to‐average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. PTS technique has some issues such as higher computational complexity due to its exhaustive searching of optimal phase factors.
Sanjana Prasad, Ramesh Jayabalan
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PSO Algorithm on PAPR Reduction Performance of Asymmetrically Clipped Optical‐OFDM
Applied Computational Intelligence and Soft Computing, Volume 2026, Issue 1, 2026.This research presents a novel hybrid optimization framework combining artificial neural networks (ANN) and particle swarm optimization (PSO) to mitigate the high peak‐to‐average power ratio (PAPR) in asymmetrically clipped optical‐orthogonal frequency division multiplexing (ACO‐OFDM) systems. While conventional PTS effectively reduces PAPR, it suffers
Hermansyah Alam +5 more
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Journal of Computer Networks and Communications, Volume 2019, Issue 1, 2019., 2019 Orthogonal frequency division multiplexing (OFDM) is the highly spectrally well‐organized method that has the difficulty of excessive peak power to average power ratio (PAPR), which ultimately imposes constraints on the high‐power amplifier. Many practices have been projected to lessen PAPR of the OFDM systems.
Prabal Gupta +5 more
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High-Resolution Scalar Quantization with Rényi Entropy Constraint [PDF]
, 2011 We consider optimal scalar quantization with $r$th power distortion and constrained R\'enyi entropy of order $\alpha$. For sources with absolutely continuous distributions the high rate asymptotics of the quantizer distortion has long been known for ...
Kreitmeier, Wolfgang, Linder, Tamas
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IET Communications, Volume 19, Issue 1, January/December 2025.This article proposes a hybrid SLM+PTS+RNN algorithm to mitigate the high PAPR challenge in UFMC systems for B5G networks. The method significantly improves power efficiency (by 30%–40%) while maintaining BER and PSD performance, outperforming traditional PAPR reduction techniques.
Arun Kumar +2 more
wiley +1 more source
Reversible Data Hiding for DICOM Image Using Lifting and Companding
Cryptography, 2019 In this work, a reversible watermarking technique is proposed for DICOM (Digital Imaging and Communications in Medicine) image that offers high embedding capacity (payload), security and fidelity of the watermarked image.
Amit Phadikar +2 more
doaj +1 more source
Journal of Electrical and Computer Engineering, Volume 2025, Issue 1, 2025.Smart hospitals have enormous potential to improve global standards of medical services. Integrating fifth‐generation (5G) and beyond 5G radio with the present healthcare framework can make hospitals smarter. High spectral access, data rate, capacity, low latency, and large data handling are requirements of innovative hospitals.
Arun Kumar +2 more
wiley +1 more source
Journal of Electrical and Computer Engineering, Volume 2018, Issue 1, 2018., 2018 A data clipping and normalization technique is employed to improve the performance of the overall direct detection optical orthogonal frequency division multiplexing (DCO‐OFDM) system. A detailed analysis of clipping distortion introduced by digital clipping and normalization is provided. The normalization operation amplifies the clipped data signal to
Jiang Wu, Zhongpeng Wang, Jit S. Mandeep
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A PAPR correction scheme for LoRa self‐jamming waveforms
IET Communications, Volume 18, Issue 19, Page 1588-1603, December 2024.A self‐jamming scheme of LoRa waveforms enabling secure transmissions is recently proposed in literature, which performs well in simulations. However, experiments on SDR equipment immediately showed that a transmission is impossible due to PAPR introduced by the waveform modification.
Clément Demeslay +5 more
wiley +1 more source
Advances in Condensed Matter Physics, Volume 2018, Issue 1, 2018., 2018 Light‐emitting diode‐ (LED‐) based visible light communication (VLC) has become a potential candidate for next generation high‐speed indoor wireless communication. Due to the limited modulation bandwidth of the LED, orthogonal frequency division multiplexing (OFDM) modulation is particularly preferred in the VLC system to overcome the ISI, which ...
Xinyue Guo +3 more
wiley +1 more source