A Novel PAPR Reduction Scheme for SC-OFDM with Frequency Domain Multiplexed Pilots

Hasegawa, Fumihiro; Okazaki, Atsushi; Kubo, Hiroshi; Castelain, Damien; Mouat, D. A.

doi:10.1109/lcomm.2012.061912.120474

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…The algorithm steps of estimation are as follows. 1 Insert the decision signal dn into UW, and then perform FFT to obtain Dk . 2 Substituting Dk for X k into Equation ( 27), the estimated value ∆k of ∆ k is obtained, and the expression of ∆k is…”

Section: Estimated δ-Based Iterative Block Decision Feedback Equaliza...mentioning

confidence: 99%

“…The multipath fading problem in the process of signal transmission is one of the main factors restricting the development of high-speed wireless communication. It manifests as inter-symbol interference (ISI) in the time domain, which leads to signal distortion, thus affecting the reliability and stability of the system [1,2]. Orthogonal frequency division multiplexing (OFDM) technology is an effective means to combat the multipath problem, but OFDM technology has a high Peak to Average Power Ratio (PAPR), which requires the range of the linear region of the power amplifier to be large, increasing the system cost and a decrease in signal quality [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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An Estimated δ-Based Iterative Block Decision Feedback Equalization in SC-FDE System

et al. 2022

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We provide a novel nonlinear frequency domain equalization algorithm for the frequency domain equalization of an SC-FDE system by improving the classical iterative block decision feedback equalization (IBDFE) algorithm and applying δ estimation to the improved algorithm. The improvement of the IBDFE algorithm is carried out by replacing the ZF equalization in the feedback branch with the MMSE equalization and eliminating the iteration of the correlation factor, thus reducing the noise error and the computational complexity of the original algorithm. δ estimation can estimate residual inter-symbol interference in the signal after MMSE equalization and reject it, thus further improving the equalization accuracy. The simulation results show that the performance of the novel algorithm is better than that of the IBDFE algorithm with similar complexity, or the complexity of the novel algorithm is lower than that of the IBDFE algorithm with similar performance.

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Section: Estimated δ-Based Iterative Block Decision Feedback Equaliza...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Estimated δ-Based Iterative Block Decision Feedback Equalization in SC-FDE System

et al. 2022

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“…But in this technique, each user uses a subset of subcarriers to transmit its own data. The subcarriers which are not used for the data transmission are filled with zeros [24]. Here, the number of subcarriers allocated to each user is assumed to be M. In the DFT-spreading technique, M-point DFT is used for spreading, and the output of DFT is assigned to the subcarriers of IDFT.…”

Section: Dft Spread Techniquementioning

confidence: 99%

PAPR Reduction for Improved Efficiency of OFDM Modulation for Next Generation Communication Systems

Yadav¹,

Bera²

2016

IJECE

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Highly linear power amplifiers are required for transferring large amount of data for future communication. Orthogonal frequency division multiplexing (OFDM) provides high data rate transmission capability with robustness to radio channel impairments. It has been widely accepted for future communication for different services. But, it suffers from high value of peakto-average power ratio (PAPR). High value of PAPR drives high power amplifiers in saturation and causes it to operate in the nonlinear region. In this paper, comparative study of four different PAPR reduction techniques: clipping and filtering (CF), selective mapping method (SLM), partial transmit sequence (PTS) and DFT-spread technique have been done. All rights reserved. Corresponding Author:Shatrughna Prasad Yadav, Electrical and Electronics Engineering Department, Indus University, Ahmedabad, Gujarat, India. Email: spyadav68@gmail.com INTRODUCTIONThe future generation communication requires high data rate. But dealing with the high data rate in an unpredictable wireless channel is a difficult task. In order to exchange larger amount of information highly linear power amplifiers are required. With the application of orthogonal frequency division multiplexing (OFDM) power amplifier nonlinearities becomes more vulnerable owing to their high peak to average power ratio (PAPR) caused due to large fluctuations in their signal envelope. OFDM is desirable because of several advantages associated with it, such as, tolerance to inter-symbol interference, good spectral efficiency, best performance of frequency selective fading in multipath environment, robustness to channel impairments etc. OFDM is efficiently used to combat the unpredictability of wireless channel and provide high data rate communications [1]. When compared with traditional communication systems, it has several advantages over it. It turns the frequency-selective fading channel into a flat fading channel and hence uses simple receiver. It is spectrally efficient and is ideal for multimedia communication systems. On the other hand, it is sensitive to timing and frequency synchronization errors and has high value of PAPR [2].OFDM systems has many applications and are widely used in high-bit-rate digital subscriber lines (HDSL), digital audio broadcasting (DAB), digital video broadcasting (DVB) along with high-definition television (HDTV), terrestrial broadcasting, etc. It is considered as a better candidate for the future generation communication systems [3]. In the OFDM transmitter the digitally mapped 4-QAM signal is

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New method for PAPR reduction based on union strategy in OFDM system

Zhao

2014

J. Electron.(China)

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A Novel PAPR Reduction Scheme for SC-OFDM with Frequency Domain Multiplexed Pilots

Cited by 8 publications

References 7 publications

An Estimated δ-Based Iterative Block Decision Feedback Equalization in SC-FDE System

An Estimated δ-Based Iterative Block Decision Feedback Equalization in SC-FDE System

PAPR Reduction for Improved Efficiency of OFDM Modulation for Next Generation Communication Systems

New method for PAPR reduction based on union strategy in OFDM system

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