Adaptive data distribution technique for enhancing MB-OFDM UWB link performance in detect and avoid environments

Rateb, Ahmad M.; Yusof, Sharifah Kamilah Syed; Fisal, Norsheila

doi:10.1504/ijuwbcs.2011.038631

Cited by 3 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, by applying (2), (14) and (17) to (13), we may express ρ y in terms of α, b and ρ x as follows:…”

Section: A Papr Analysismentioning

confidence: 99%

“…To name a few, Long-Term Evolution (LTE) [7], Worldwide Interoperability for Microwave Access (WiMAX) [8], IEEE 802.11 a/g/n/ac/ax [9], [10] and Digital Video Broadcast (DVB-T1/2) [11], [12]. The major strengths of OFDM are high spectral efficiency, bandwidth flexibility, ability to combat multipath fading effects, and ability to coexist with other systems sharing the same band [13], [14]. In addition, OFDM is highly compatible with Multiple-Input-Multiple-Output (MIMO) systems, which is expected to play a central role in 5G systems [15], [16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Optimal Low Complexity PAPR Reduction Technique for Next Generation OFDM Systems

Rateb

Labana

2019

IEEE Access

Self Cite

View full text Add to dashboard Cite

Orthogonal frequency division multiplexing (OFDM) is an efficient multi-carrier modulation technique that underlies most of the current and probably future high-speed wireless communication systems. However, the OFDM waveform is characterized by a high peak-to-average power ratio (PAPR), especially when a large number of subcarriers are used. A high PAPR is a major waveform defect since it leads to non-linear distortion when passing through the transmitter's power amplifier. Most of the PAPR reduction techniques found in the literature reduce the PAPR mainly at the cost of either excessive computational complexity or degrading the transmission bit error rate (BER). We propose a low-complexity technique for PAPR reduction based on linear scaling of a portion of signal coefficients by an optimal factor. This paper is backed up by the extensive analysis of various performance metrics, which leads to optimal choices of key parameters and hence maximum achievable gains. The analytic and simulated results show that the proposed technique is capable of reducing the PAPR effectively with negligible effect on BER in return for a slight reduction in data rate. For example, for 1024 subcarriers, the PAPR can be reduced from 13 dB to below 7.4 or 6.9 dB, in return for only 1% or 2% reduction in data rate, respectively. In addition, the achievable PAPR varies very slightly in response to increasing the number of subcarriers. This offers a highly competitive and flexible tradeoff compared with those provided by current techniques found in the literature. Therefore, this technique has a very good potential for practical application in current and future OFDM-based systems, especially those which employ a very large number of subcarriers, such as LTE, DVB-T2, and 5G systems. INDEX TERMS Orthogonal frequency division multiplexing (OFDM), peak to average power ratio (PAPR), optimization, 5G, distortionless techniques, signal distortion techniques, companding, peak clipping, DVB-T2, LTE, low-complexity.

show abstract

“…Therefore, by applying (2), (14) and (17) to (13), we may express ρ y in terms of α, b and ρ x as follows:…”

Section: A Papr Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Optimal Low Complexity PAPR Reduction Technique for Next Generation OFDM Systems

Rateb

Labana

2019

IEEE Access

Self Cite

View full text Add to dashboard Cite

show abstract

“…OFDM is a major form of digital MCM scheme which is regarded as a better technique for providing high-speed data rate in wire-line and wireless communication systems [3], [4]. It offers high spectral efficiency, high data rate capacity, bandwidth flexibility, robustness to multipath fading, is easy to implement based on inverse Fast Fourier Transform (IFFT) algorithm, and the ability to combine with other systems of the same band [5]- [7]. Furthermore, OFDM is compatible with Multiple-Input-Multiple-Output (MIMO) technologies which are expected to be an important scheme in 5G systems [8], [9], [10].…”

Section: Introductionmentioning

confidence: 99%

PAPR Reduction in OFDM Systems Using Hybrid Zadoff-Chu Transform Precoding and Partial Transmit Sequence

Oyegoke

Olasoji

2021

EJECE

View full text Add to dashboard Cite

Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation (MCM) scheme that plays a significant role in digital wireless communication. As a result of its high data rate capability and immunity to multipath fading effect, among others, OFDM remains an ideal technology for 5G communication systems and beyond. Unfortunately, a major drawback of this technology is the high peak-to-average power ratio (PAPR). Nevertheless, many techniques for reducing PAPR have been proposed in the past to address this problem. However, all the techniques previously used have limitations such as high computational complexity, data rate loss, high signal distortion, increase in bandwidth, increase in transmit power, and memory requirements. In this paper, a hybrid technique that combines Zadoff-Chu Transform (ZCT) precoding and Partial Transmit Sequence (PTS) for reducing high PAPR in OFDM signals is presented. To reduce the data rate loss and computational complexity in PTS when a large subblock is used, a Zadoff-Chu precoding is applied to OFDM symbols to precode the symbol before applying PTS with a fewer number of subblocks. An OFDM model was developed where ZCT and PTS techniques were implemented. The performance of the hybrid model was analyzed using Power Spectral Density (PSD), Complementary Cumulative Distribution Function (CCDF), and Bit Error Rate (BER). The simulation result indicates that the hybrid ZCT-PTS provides a better result than using either Zadoff-Chu precoding technique or Partial Transmit Sequence technique separately. A PAPR of 4.2 dB and BER of 3dB is achieved for hybrid ZCT-PTS. The hybrid technique provides a better system performance when compared with Conventional OFDM systems.

show abstract

Crest Dwindling and Interposing for PAPR Reduction in OFDM Signal with Sustainable Spectral Efficiency

Geetha¹,

Mahadevaswamy²

2022

Wireless Pers Commun

View full text Add to dashboard Cite

Adaptive data distribution technique for enhancing MB-OFDM UWB link performance in detect and avoid environments

Cited by 3 publications

References 21 publications

An Optimal Low Complexity PAPR Reduction Technique for Next Generation OFDM Systems

An Optimal Low Complexity PAPR Reduction Technique for Next Generation OFDM Systems

PAPR Reduction in OFDM Systems Using Hybrid Zadoff-Chu Transform Precoding and Partial Transmit Sequence

Crest Dwindling and Interposing for PAPR Reduction in OFDM Signal with Sustainable Spectral Efficiency

Contact Info

Product

Resources

About