Showing 1-25 of 14,372 resultsfor "Index Terms":Peak to average power ratio
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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
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 PAM-DMT bas...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 large ampl...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 transmitting DCSK mo...Show More
43.63-Gbit/s Multiple-User SC-FDMA PON With Sub-Nyquist Receiver and PAPR Reduction
Chi-Hsiang Lin;Ruei Fang;Chun-Ting Lin;Chia-Chien Wei;Sien Chi
IEEE Photonics Technology Letters
Cited by: Papers (3)
In this letter, we propose a novel delay-division-multiplexing (DDM) scheme to enable SC-FDMA PON with a sub-Nyquist sampling rate ADC and lower PAPR, named time-interleaved FDMA (TI-FDMA). The proposed pre-processing method reduces the sampling rate of the ADC to 1/2 ~ 1/32 of the Nyquist sampling rate. The FFT size can be reduced to 1/32 (i.e., from 1024 to 32) due to lower sampling ratio and ea...Show More
A Hybrid Supply Modulator with Envelop Tracking Technique for RF Power Amplifier
2020 International Symposium on Computer, Consumer and Control (IS3C)
Year: 2020 | Conference Paper |
Cited by: Papers (1)
This paper presents a hybrid supply modulator with envelop tracking (ET) technique for radio frequency (RF) power amplifier. The proposed ET technique tracks the envelop signal up to 70 MHz without large distortion and delay, which can reduce heat, enhance battery life and improve the efficiency of the supply modulator affected by high peak-to-average power ratio (PAPR). Indeed, the circuit of the...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. Furthermore, a novel...Show More
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. Based on GAM,...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 jointly...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 expressed in...Show More
Synthesis of Signals with a Low-Level of Out-of-Band Emission and Peak-to-Average Power Ratio
2018 IEEE International Conference on Electrical Engineering and Photonics (EExPolytech)
Year: 2018 | Conference Paper |
Cited by: Papers (26)
In this paper new pulse shapes of multicomponent signals are presented to improve spectral efficiency. We propose a solution to an optimization problem for obtaining optimal pulse shapes. The optimization problem is expressed by the restriction of out-of-band emission and the restriction of the peak-to-average power ratio (PAPR) magnitude. It was shown that using multicomponent signals with optima...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. In this paper...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 is equi...Show More
Orbital Angular Momentum Spread Transmission With Interferometry Codes for Peak-to-Average Power Ratio Reduction
The uniform circular array (UCA) has been considered to be an effective way to generate orbital angular momentum (OAM) waves. However, by using UCA to transmit multiplexing OAM signals, the peak-to-average power ratio (PAPR) is unavoidable, which brings the low efficiency to the power amplification. In this letter, the interferometry code is introduced to reduce the PAPR in the antenna element of ...Show More
An Improved Tone Reservation Method for PAPR Reduction in FBMC-OQAM System
2019 IEEE MTT-S International Wireless Symposium (IWS)
Year: 2019 | Conference Paper |
Cited by: Papers (4)
In this paper, an improved tone reservation (TR) method is proposed based on the least squares (LS) approximation which can improve the PAPR performance of the FBMC-OQAM signal. In the proposed LS-TR method, the least squares method is used to approximate the value of the βW reserved tones while the inter-symbol orthogonality still holds. The proposed method can utilize the information of addition...Show More
Successive papr reduction of OFDM systems via rotation of optimally selected information symbols
2018 26th Signal Processing and Communications Applications Conference (SIU)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
High peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems is one of the vital degrading factors for the performance of communication systems. In this paper, a new PAPR reduction technique called successive reduction of PAPR (SRP) is introduced. It uses a novel approach that high PAPR may be caused by the characteristics of inverse fast Fourier transform o...Show More
Additive Scrambling PAPR Reduction Scheme in BPSK-OFDM Systems
2018 8th International Conference on Electronics Information and Emergency Communication (ICEIEC)
Year: 2018 | Conference Paper |
OFDM is a multicarrier transmission technique with high data rate, but one of its important shortcomings is the large PAPR of OFDM signals. Among the existing PAPR reduction methods, SLM is very attractive because of its favorable performance in PAPR reduction. This paper proposes an additive scrambling PAPR reduction scheme for OFDM systems employing BPSK. In proposed additive scrambling scheme, ...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 paper...Show More
A New Algorithm to Reduce PAPR in OFDM System
2018 International Conference on Sensor Networks and Signal Processing (SNSP)
Year: 2018 | Conference Paper |
This paper analyzes the reason, why Peak-to-average power ratio (PAPR) is too high in Orthogonal Frequency Division Multiplexing (OFDM) system and the impairment of PAPR to communication quality. Then, this paper proposes a new differential regression algorithm to reduce PAPR. By differentiating the frequency domain signal so that the average power of the regression signal equals the average power...Show More
DGPA-Based Tone Reservation for PAPR Reduction in OFDM Systems
2018 IEEE 4th International Conference on Computer and Communications (ICCC)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
In this paper, we concentrate on the high peak-to-average power ratio (PAPR) reduction issue in the orthogonal frequency division multiplexing (OFDM) system based on the tone reservation (TR) method. We first apply the discrete generalized pursuit algorithm (DGPA) to search the optimal peak reduction tone (PRT) set. Then, we compare the performance and computational complexity (CC) between the DGP...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-complexity TR appr...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 band-limitation...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, dither si...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 complexity caused ...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 effica...Show More
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