Algorithm for repeated clipping and filtering in peak-to-average power reduction for OFDM

Leung, S.H.; Ju, Shiguang; Bi, Guoan

doi:10.1049/el:20021137

Cited by 17 publications

(10 citation statements)

References 3 publications

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“…Teknik reduksi PAPR dengan metode distorsi yang paling sederhana adalah dengan melakukan clipping pada sinyal OFDM sebelum proses amplifikasi [6]. Teknik clipping sendiri dapat dikombinasikan dengan teknik lain seperti clipping berulang kemudian dilanjutkan dengan proses filtering [7]. Teknik lain yang tergolong metode distorsi adalah windowing [8], envelope scaling [9], dan teknik companding [10].…”

Section: Iunclassified

Teknik Reduksi PAPR Pada Sistem OFDM Dengan Partial Transmit Sequence (PTS) dan Selected Mapping (SLM)

Wael

Desvasari

Adji

2016

indones.j.electron.telecommun.

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AbstrakOrthogonal Frequency Division Multiplexing (OFDM) merupakan teknik modulasi multicarrier yang banyak diadopsi oleh berbagai teknologi komunikasi nirkabel untuk memenuhi kebutuhan akses broadband yang kian meningkat karena menyediakan transmisi dengan data rate tinggi. Selain itu, OFDM juga tahan terhadap efek multipath fading. Salah satu permasalahan utama pada sistem ini adalah tingginya nilai PAPR yang menyebabkan penggunaan power amplifier menjadi tidak efisien. Sebagai solusi permasalahan ini, teknik Selected Mapping (SLM) dan Partial Transmit Sequence (PTS) digunakan untuk mereduksi nilai PAPR. Kedua teknik ini dipilih karena efisien dalam mereduksi nilai PAPR. Dari hasil simulasi yang dilakukan terhadap 1000 simbol OFDM, kedua teknik ini memberikan reduksi PAPR yang semakin besar untuk jumlah subblok yang semakin banyak. Selanjutnya, kinerja kedua teknik ini dibandingkan. Dengan jumlah subblok yang sama, SLM memiliki performansi yang lebih baik dalam mereduksi PAPR dibandingkan dengan PTS. Kata kunci: OFDM, teknik reduksi PAPR, selected mapping (SLM), partial transmit sequence (PTS), complementary cumulative distribution function (CCDF). Abstract Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation technique that is widely adopted by a variety of wireless communication technologies to meet the needs of highly demand on broadband wireless access. It is because OFDM provides high data rate transmission and robust against multipath fading effect. One of the major drawbacks in this system is the high PAPR value which leads to inefficiency in the use

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Section: Iunclassified

Teknik Reduksi PAPR Pada Sistem OFDM Dengan Partial Transmit Sequence (PTS) dan Selected Mapping (SLM)

Wael

Desvasari

Adji

2016

indones.j.electron.telecommun.

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“…Where 2 max ( ) x t is the peak signal power, and 2 [ ( ) ] E x t is the average signal power, which is measured after clipping and filtering [5,6]. Generally, the input signal of IFFT is a random data, so that output signal of IFFT is also random data.…”

Section: Ofdm Syatemmentioning

confidence: 99%

A modified Iterative Amplitude clipping and filtering technique for PAPR reduction in OFDM systems

Sharma

Tomar

et al. 2011

2011 International Conference on Emerging Trends in Networks and Computer Communications (ETNCC)

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Orthogonal frequency multiplexing (OFDM) is a promising technique for high data-bit-rate in wireless communication systems. However, one of the major drawback of OFDM is high peak-to-average power ratio (PAPR). In this paper, we propose modified Iterative Amplitude clipping and filtering (IACF) technique to reduce the PAPR in OFDM signal. This paper evaluates PAPR reduction effect with a graded bandlimiting filter in the iterative clipping and filtering method. The computer simulation result shows that the proposed method achieves target PAPR using fewer iteration numbers as in conventional method and improves the PAPR and BER performance as compared to conventional Amplitude clipping and filtering (AFC) method.

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“…The performance of this PAPR reduction technique when using a DFFLPA is observed with respect to adjacent channel leakage ratio (ACLR) and efficiency, for a multicarrier WCDMA downlink system. The proposed method reduces the hardware complexity when compared to similar techniques [6]. Experimental results based on the PAPR reduction method and the fabricated DFFLPA demonstrate that the proposed combination significantly enhances the efficiency in comparison to the stand alone DFFLPA architecture.…”

Section: Introductionmentioning

confidence: 95%

Doherty Feed-Forward Amplifier Performance Using a Novel Crest Factor Reduction Technique

Kim

Cho

Stapleton

et al. 2007

IEEE Microw. Wireless Compon. Lett.

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This letter describes a novel iterative crest factor reduction (CFR) technique applied to a Doherty feedforward linear power amplifier (DFFLPA). This novel CFR technique is based on repeated peak cancellations and uses a scaling factor to reduce complexity. According to our results, only three iterations result in over 4-dB reduction for a two carrier WCDMA signal. Experimental results demonstrate that the proposed algorithm was able to enhance the DFFLPA system efficiency from 11.5% to 18.3%.Index Terms-Doherty power amplifier (DPA), error vector magnitude (EVM), feed-forward linear power amplifier (FFLPA), finite impulse response (FIR) filter, peak-to-average power ratio (PAPR).

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Algorithm for repeated clipping and filtering in peak-to-average power reduction for OFDM

Cited by 17 publications

References 3 publications

Teknik Reduksi PAPR Pada Sistem OFDM Dengan Partial Transmit Sequence (PTS) dan Selected Mapping (SLM)

Teknik Reduksi PAPR Pada Sistem OFDM Dengan Partial Transmit Sequence (PTS) dan Selected Mapping (SLM)

A modified Iterative Amplitude clipping and filtering technique for PAPR reduction in OFDM systems

Doherty Feed-Forward Amplifier Performance Using a Novel Crest Factor Reduction Technique

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