Showing 1-25 of 5,286 resultsfor "Index Terms":peak-to-average power ratio (PAPR)
"Index Terms":peak-to-average power ratio (PAPR)
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A New Algorithm for Searching Sequences with Low PAPR via Goal Attainment Method
2022 10th International Workshop on Signal Design and Its Applications in Communications (IWSDA)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
This paper is focused on designing phase sequences with good peak-to-average power ratio (PAPR). The PAPR optimization problem is a min-max problem, which is generally difficult to solve with optimization theory. The goal attainment method (GAM) is one of the most prominent approach to solve the min-max problem, which has been used to optimize the peak sidelobe level of the sequence. B...Show More
PAPR reduction of FBMC-OQAM using A-law and Mu-law companding
Abdullah Hasan;Muhammad Zeeshan;Muhammad Ali Mumtaz;Muhammad Waqas Khan
Filter bank multicarrier scheme is an efficient multicarrier scheme and candidate waveform for 5G. Similar to OFDM and other multicarrier schemes, FBMC also has high Peak-to-Average Power Ratio (PAPR) which leads us to the use of high power amplifiers with high dynamic range. Companding techniques are used to reduce PAPR at the expense of bit error rate (BER) performance degradation. I...Show More
PAPR Reduction of Transmitted Signal Using Modified Root Roll-Off Filter
2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)
Year: 2021 | Conference Paper |
This paper discusses a single-carrier signal with a Modified Root Roll-off (MRR) filter to attain a lower Peak-to-Average Power Ratio (PAPR) than that of the conventional Root Raised Cosine (RRC) filter. A combination of the MRR filter on the transmitter side and the RRC filter on the receiver side satisfies the Nyquist criterion since the total transfer function has a roll-off region expres...Show More
Pilot-Assisted PAPR Reduction in PAM-DMT based Visible Light Communication Systems
2021 IEEE Latin-American Conference on Communications (LATINCOM)
Year: 2021 | Conference Paper |
Cited by: Papers (5)
Pulse-amplitude-modulated discrete multitone modulation (PAM-DMT) offers an energy-efficient modulation solution for optical wireless communication systems. However, similar to other multicarrier modulation (MCM) techniques, PAM-DMT suffers from a high peak-to-average power ratio (PAPR). This paper experimentally demonstrates the efficacy of pilot-assisted (PA) PAPR reduction system in...Show More
Novel PAPR Reduction Scheme Based on Piecewise Nonlinear Companding Transform in OFDM Systems
IEEE Communications Letters
Cited by: Papers (17)
In this letter, a novel nonlinear companding scheme is proposed to reduce the peak-to-average power ratio (PAPR) for orthogonal frequency division multiplexing (OFDM) systems with a low bit error rate (BER) and out-of-band (OOB) radiation of the power spectral density (PSD). This companding scheme does not change the statistics of small-amplitude signals and transforms the statistics of larg...Show More
Achievable Energy Efficiency in Massive MIMO: Impact of DAC Resolution and PAPR Reduction for Practical Network Topologies at mm-Waves
IEEE Communications Letters
Cited by: Papers (1)
This letter explores key parameters of a massive MIMO system and their impact on energy efficiency at transmission. In particular, the effect of the digital to analog converter resolution and peak to average power ratio reduction techniques are addressed, in the context of practical user location distributions for both line and non line of sight channels. Results show interesting design trade-offs...Show More
A Low-Complexity Joint PAPR Reduction and Predistortion Based on Generalized Memory Polynomial Model
Digital predistortion (DPD) technique is an effective means to alleviate the nonlinearity of power amplifiers (PAs) and improve transmitter efficiency. However, for orthogonal frequency division multiplexing (OFDM) systems with a high peak-to-average power ratio (PAPR), the PAPR reduction needs to be deployed in combination with DPD, to maximize transmitter efficiency. The extra comple...Show More
PAPR Reduction in PAM-DMT based WDM VLC
Hussien T. Alrakah;Tilahun Z. Gutema;Sinan Sinanovic;Wasiu O. Popoola
2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)
Year: 2022 | Conference Paper |
Cited by: Papers (2)
Visible light communication (VLC) can achieve high data rate transmission with discrete multitone (DMT) systems. A DMT variant is pulse-amplitude-modulated discrete multitone modulation (PAM-DMT) which offers an energy-efficient modulation solution for VLC. However, similar to other DMT modulation techniques, PAM-DMT suffers from a high peak-to-average power ratio (PAPR). In this paper, the ...Show More
PAPR reduction of FBMC-OQAM systems using logarithmic rooting companding
2021 Fourth International Conference on Electrical, Computer and Communication Technologies (ICECCT)
Year: 2021 | Conference Paper |
Cited by: Papers (4)
Filter Bank Multicarrier (FBMC) is a multicarrier waveform technology that has a high spectral efficiency, minimal out-of-band (OOB) leakage, and low synchronization needs. With these properties, FBMC is a suitable multicarrier waveform technique for 5G and future wireless networks. FBMC, like other multicarrier waveform schemes, has a high peak-to-average-power ratio (PAPR) problem. In this...Show More
Improved Partial Transmit Sequence Based PAPR Reduction of UFMC Systems
2022 International Conference on Information Networking (ICOIN)
Year: 2022 | Conference Paper |
Universal Filtered Multi-Carrier (UFMC) is considered one of the foremost waveforms for the future wireless communication system. Because of multi-carrier transmission, UFMC system conveys high peak-to-average power ratio (PAPR), which reduces the system performance. This paper uses improved partial transmit sequence (PTS) technique to reduce the PAPR of UFMC system. In PTS scheme, mul...Show More
A novel combined SLM-PTS technique based on Genetic Algorithms for PAPR reduction in OFDM systems
2020 Second International Conference on Embedded & Distributed Systems (EDiS)
Year: 2020 | Conference Paper |
Cited by: Papers (3)
0FDM has today becoming the modulation of choice for most modern broadband communication systems in use, either wireline or wireless. The main reasons is that OFDM provides the best usage of the available frequency band which maximizes the spectral efficiency and also its robustness to the multipath fading channel. However, OFDM has a major drawback of having a large Peak-to-Average Power Ratio ([...Show More
PAPR Reduction in OFDM-IM Using Multilevel Dither Signals
IEEE Communications Letters
Cited by: Papers (16)
Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is a novel multicarrier scheme, which uses the indices of the active subcarriers to transmit data. The OFDM-IM also inherits the high peak-to-average power ratio (PAPR) problem, which induces in-band distortion and out-of-band radiation when OFDM-IM signal passes through high-power amplifier (HPA). In this letter, dit...Show More
An enhanced selected mapping technique for joint PAPR reduction and impulsive noise suppression in multi-carrier powerline communications systems
2018 IEEE International Symposium on Power Line Communications and its Applications (ISPLC)
Year: 2018 | Conference Paper |
Cited by: Papers (3)
In power line communication (PLC) systems using multi-carrier modulation such as orthogonal frequency division multiplexing (OFDM), reduction of peak-to-average power ratio (PAPR) of OFDM signal and mitigation of the influence of impulsive noise are challenging problems. To deal with these problems in PLC-OFDM systems, this paper proposes an enhanced selected mapping (e-SLM) technique that j...Show More
A Novel PAPR Reduction Scheme Based on Joint Traditional Algorithm and Machine Learning for CO-OFDM Systems
IEEE Photonics Technology Letters
Cited by: Papers (11)
The high peak-to-average power ratio (PAPR) deteriorates the performance of coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. Machine learning (ML) has evolved into a powerful technology to reduce PAPR with its flexible learning ability. We propose a joint scheme which adopts iterative partial transmission sequence (IPTS) scheme cascading a feedforward neur...Show More
PAPR Reduction of OFDM With Trellis Shaping Based on ${p}$ -Norm Minimization
We propose a new metric for trellis shaping (TS) that reduces the peak-to-average power ratio (PAPR) of orthogonal frequency-division multiplexing (OFDM) signals. The proposed metric is based on the p-norm of the OFDM signal instantaneous power and generalization of the conventional timedomain metric based on the maximum peak power. Furthermore, we prove that the proposed metric with p = 2 i...Show More
Low PAPR OFDM-Based DCSK Design With Carrier Interferometry Spreading Codes
IEEE Communications Letters
Cited by: Papers (13)
The multi-carrier aided non-coherent differential chaos shift keying (DCSK) modulated systems suffer from high peak-to-average power ratio (PAPR) due to the summations of multiple modulated signals. In this letter, we present a carrier interferometry (CI) code-aided spreading orthogonal frequency-division multiplexing-based DCSK scheme to suppress the PAPR. Instead of directly transmit...Show More
Tone reservation ratio optimization for PAPR reduction in OFDM systems
2018 IEEE Wireless Communications and Networking Conference (WCNC)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
Orthogonal frequency division multiplexing (OFDM) systems suffer from a large peak-to-average power ratio (PAPR), leading to lower power efficiency and nonlinear distortion at the transmit power amplifier. Tone reservation (TR) techniques can effectively reduce PAPR, but may also cause data rate reduction if the TR ratio is not carefully designed. In this paper, we propose a low-comple...Show More
A Model-Driven DL Algorithm for PAPR Reduction in OFDM System
IEEE Communications Letters
Cited by: Papers (25)
Deep learning (DL) has dramatically improved the peak-to-average power ratio (PAPR) performance. However, the high computational complexity and excessive training data constitute a significant hurdle. In this letter, a model-driven deep learning algorithm is proposed for PAPR reduction in orthogonal frequency division multiplexing (OFDM) system. Precisely, an iterative peak-canceling s...Show More
Effect of Limiter Based PAPR Reduction for Massive MIMO Systems
2018 International Japan-Africa Conference on Electronics, Communications and Computations (JAC-ECC)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
In massive multi-input multi-output (mMIMO) orthogonal frequency division multiplexing (OFDM) systems, reduction of high peak-to-average power ratio (PAPR) is a challenging problem. Although deliberate amplitude peak limiting is a promising PAPR reduction approach, it causes un-desired nonlinear in-band distortion and out-of-band radiation. Thus, the joint use of a peak limiter and ban...Show More
The Effectiveness of Distortion-Type PAPR and Total Degradation Reduction in OFDM Systems
IEEE Transactions on Broadcasting
Cited by: Papers (6)
Conventional peak-to-average power ratio (PAPR) reduction metrics including bit error rate (BER) and complementary cumulative distribution function (CCDF) can hardly reveal the overall effectiveness of a distortion-type PAPR technique. To remedy this drawback, a new overall performance index, BER at various power consumption of a given HPA and channel noise level, is proposed. Furtherm...Show More
Improved Companding Transform for PAPR Reduction in ACO-OFDM-Based VLC Systems
IEEE Communications Letters
Cited by: Papers (32)
In this letter, an improved linear nonsymmetrical transform (ILNST) is proposed to reduce the peak-to-average power ratio (PAPR) for asymmetric clipping optical orthogonal frequency division multiplexing-based visible light communication (VLC) systems. The emission power conservation criteria are implemented to calculate the enlarge coefficient with a given compression coefficient. The trans...Show More
On improving the accuracy of Visible Light Positioning system with SLM-based PAPR reduction schemes
Yanqi Huang;Yourong Liu;Lina Shi;Dayu Shi;Xun Zhang;El-Hassane Aglzim;Jihong Zheng
2020 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB)
Year: 2020 | Conference Paper |
Cited by: Papers (1)
DC-biased optical Orthogonal Frequency Division Multiplexing (DCO-OFDM)-based visible light positioning (VLP) technology along with the Received Signal Strength(RSS) positioning algorithm is widely used to achieve centimeter level positioning accuracy for incoming 5G era, especially indoor environment. However, the DCO-OFDM has the peak-to-average power ratio (PAPR) issue which imposes the n...Show More
A CMOS Switched-Capacitor Boost Mode Envelope Tracking Regulator with 4% Efficiency Improvement at 7.7dB PAPR for 20MHz LTE Envelope Tracking RF Power Amplifiers
Neha Kumari;Shang-Hsien Yang;Ke-Horng Chen;Ying-Hsi Lin;Shian-Ru Lin;Tsung-Yen Tsai
2019 IEEE Asian Solid-State Circuits Conference (A-SSCC)
Year: 2019 | Conference Paper |
Cited by: Papers (7)
In this paper, the switched-capacitor boost (SCB) mode envelope tracking (ET) technique with a switched-capacitor circuit and a low dropout (LDO) regulator are used to replace conventional envelope tracking regulators. At a Peak-to-Average Power Ratio (PAPR) of 7.7dB common for LTE communication, the efficiency is 72%, which is 4% higher than the theoretical limit of conventional ET techniqu...Show More
A Novel PAPR Reduction Scheme for Polar-Coded OFDM Systems
IEEE Communications Letters
Cited by: Papers (22)
A novel joint channel coding and peak-to-average power ratio (PAPR) reduction technique for polar-coded orthogonal frequency-division multiplexing (OFDM) systems is proposed. The main concept is to introduce shaping indices to polar encoder, and generate multiple OFDM symbol candidates according to various shaping bit patterns and then select the one with the lowest PAPR as a transmitt...Show More
Peak Insertion and Active Constellation Extension with Subcarrier Grouping PAPR reduction techniques for OFDM system
2018 International Conference on Recent Innovations in Electrical, Electronics & Communication Engineering (ICRIEECE)
Year: 2018 | Conference Paper |
Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient multicarrier modulation technique for high speed data transmission over multipath fading channels. Along with number of advantages of using OFDM there are some issue such as the transmitted signals get suffered from high Peak-to-Average Power Ratio (PAPR). Different researchers have proposed various techniques to han...Show More
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