Zero-Padding Techniques in OFDM Systems

Al‐Jawhar, Yasir Amer; Ramli, Khairun Nidzam; Taher, Montadar Abas; Shah, Nor Shahida Mohd; Audah, Lukman; Ahmed, Mohammed

doi:10.15676/ijeei.2018.10.4.6

Cited by 12 publications

(16 citation statements)

References 22 publications

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“…Moreover, the IFFT size plays a vital role in frequency localization, where the large IFFT size provides more density and details, which are effective graphically. Furthermore, it ensures a symmetrical spectrum representation of the signal and spreads the spectrum on the symbols uniformly [35]. Accordingly, the analysis and simulation indicate that the F-OFDM waveform outperforms the OFDM standard with respect to OOBE suppression.…”

Section: Oobe Suppressionmentioning

confidence: 93%

Improving PAPR performance of filtered OFDM for 5G communications using PTS

et al. 2020

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The filtered orthogonal frequency division multiplexing (F-OFDM) system has been recommended as a waveform candidate for fifth-generation (5G) communications.The suppression of out-of-band emission (OOBE) and asynchronous transmission are the distinctive features of the filtering-based waveform frameworks. Meanwhile, the high peak-to-average power ratio (PAPR) is still a challenge for the new waveform candidates. Partial transmit sequence (PTS) is an effective technique for mitigating the trend of high PAPR in multicarrier systems. In this study, the PTS technique is employed to reduce the high PAPR value of an F-OFDM system. Then, this system is compared with the OFDM system. In addition, the other related parameters such as frequency localization, bit error rate (BER), and computational complexity are evaluated and analyzed for both systems with and without PTS. The simulation results indicate that the F-OFDM based on PTS achieves higher levels of PAPR, BER, and OOBE performances compared with OFDM. Moreover, the BER performance of F-OFDM is uninfluenced by the use of the PTS technique.

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Section: Oobe Suppressionmentioning

confidence: 93%

Improving PAPR performance of filtered OFDM for 5G communications using PTS

et al. 2020

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“…Muller introduced the partial transmission sequence technique in 1997 to improve the performance of PAPR reduction in the OFDM system [28]. In Fig.…”

Section: A Partial Transmit Sequence (Pts)mentioning

confidence: 99%

Hybrid Model for PAPR Minimization in OFDM System

2021

IJCCCE

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The technology has been growing rapidly in the form of portable wireless devices that can perform multiple functions to cope with the state-of-the-art technology and synchronization. A total device capacity must be increased to accommodate new wireless applications. This can be achieved by leveraging new technologies, with higher data rates. Spectrum pooling has gained immense popularity, with increased demand for frequency range and bandwidth availability constraints. Statistics suggest that much of the spectrum licensed is not used all the time. Because of the transmitter's nonlinearity nature, the large (peak to average power ratio (PAPR)) phenomenon is a drawback in orthogonal frequency division multiplexing (OFDM). Several hybrid approaches have recently been implemented to minimize PAPR's high value, at the expense of increasing the level of computational complexity in the system. In this paper, a new hybrid approach has been introduced in parallel to combine the selective mapping approach (SLM) with the partial transmit sequence (PTS) approach to improve the efficiency of PAPR reduction with lower numerical method complexity. The findings reveal that the OFDM systems with the proposed hybrid approach have better efficiency in terms of PAPR elimination, side-information, and computational complexity compared to current hybrid methods. Also, a hybrid approach proposed output could be maintained without degradation. Index Terms: OFDM, PTS, PAPR, SLM

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“…(5 total data [26,27]. Finally, the OFDM signal x(n) was moved to a transmitter filter f(n) to generate an F-OFDM transmitting signal g(n).…”

Section: Communication System Designmentioning

confidence: 99%

Filter orthogonal frequency‐division multiplexing scheme based on polar code in underwater acoustic communication with non‐Gaussian distribution noise

et al. 2020

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The shallow underwater acoustic (UWA) channel has been considered one of the most difficult channels for wireless communication because of several shortcomings, such as low data rate, bandwidth limitation, high multipath interference, major Doppler shifts, and severe fading [1][2][3]. The main motivation to use sound waves over electromagnetic signals is due to the relatively lower attenuation in the underwater environment [4]. A UWA channel has poor communication quality and high propagation delay; consequently, the bit error rate (BER) is increased [5]. However, the channel coding techniques can significantly decrease BER at the expense of some bandwidth loss of communication.The channel coding techniques add a redundancy of useful bits for data protection in a noisy channel [6]. The following commonly employed channel coding techniques in wireless communication have been thoroughly investigated considering UWA: low-density parity check (LDPC) code, convolution code (CC), Reed-Solomon (RS) code, and turbo code. Seo and others [7] assessed the effectiveness of the RS code and CC in the context of a UWA fading channel. The simulated findings of

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Zero-Padding Techniques in OFDM Systems

Cited by 12 publications

References 22 publications

Improving PAPR performance of filtered OFDM for 5G communications using PTS

Improving PAPR performance of filtered OFDM for 5G communications using PTS

Hybrid Model for PAPR Minimization in OFDM System

Filter orthogonal frequency‐division multiplexing scheme based on polar code in underwater acoustic communication with non‐Gaussian distribution noise

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