Reducing the Clipping Noise in OFDM Systems by Using Oversampling Scheme

Linjun WU; Shihua ZHU

doi:10.1093/ietcom/e88-b.7.3082

Reducing the Clipping Noise in OFDM Systems by Using Oversampling Scheme

Linjun WU, Shihua ZHU

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In an Orthogonal Frequency Division Multiplexing (OFDM) systems, the Peak to Average power Ratio (PAR) is high. The clipping signal scheme is a useful and simple method to reduce the PAR. However, it introduces additional noise that degrades the systems performance. We propose an oversampling scheme to deal with the received signal in order to reduce the clipping noise by using finite impulse response (FIR) filter. Coefficients of the filter are obtained by correlation function of the received signal and the oversampling information at receiver. The performance of the proposed technique is evaluated for frequency selective channel. Results show that the proposed scheme can mitigate the clipping noise significantly for OFDM systems and in order to maintain the system's capacity, the clipping ratio should be larger than 2.5.

Publication: IEICE TRANSACTIONS on Communications Vol.E88-B No.7 pp.3082-3086

Publication Date: 2005/07/01

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DOI: 10.1093/ietcom/e88-b.7.3082

Type of Manuscript: LETTER

Category: Wireless Communication Technologies

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Linjun WU, Shihua ZHU, "Reducing the Clipping Noise in OFDM Systems by Using Oversampling Scheme" in IEICE TRANSACTIONS on Communications, vol. E88-B, no. 7, pp. 3082-3086, July 2005, doi: 10.1093/ietcom/e88-b.7.3082.
Abstract: In an Orthogonal Frequency Division Multiplexing (OFDM) systems, the Peak to Average power Ratio (PAR) is high. The clipping signal scheme is a useful and simple method to reduce the PAR. However, it introduces additional noise that degrades the systems performance. We propose an oversampling scheme to deal with the received signal in order to reduce the clipping noise by using finite impulse response (FIR) filter. Coefficients of the filter are obtained by correlation function of the received signal and the oversampling information at receiver. The performance of the proposed technique is evaluated for frequency selective channel. Results show that the proposed scheme can mitigate the clipping noise significantly for OFDM systems and in order to maintain the system's capacity, the clipping ratio should be larger than 2.5.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e88-b.7.3082/_p

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@ARTICLE{e88-b_7_3082,
author={Linjun WU, Shihua ZHU, },
journal={IEICE TRANSACTIONS on Communications},
title={Reducing the Clipping Noise in OFDM Systems by Using Oversampling Scheme},
year={2005},
volume={E88-B},
number={7},
pages={3082-3086},
abstract={In an Orthogonal Frequency Division Multiplexing (OFDM) systems, the Peak to Average power Ratio (PAR) is high. The clipping signal scheme is a useful and simple method to reduce the PAR. However, it introduces additional noise that degrades the systems performance. We propose an oversampling scheme to deal with the received signal in order to reduce the clipping noise by using finite impulse response (FIR) filter. Coefficients of the filter are obtained by correlation function of the received signal and the oversampling information at receiver. The performance of the proposed technique is evaluated for frequency selective channel. Results show that the proposed scheme can mitigate the clipping noise significantly for OFDM systems and in order to maintain the system's capacity, the clipping ratio should be larger than 2.5.},
keywords={},
doi={10.1093/ietcom/e88-b.7.3082},
ISSN={},
month={July},}

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TY - JOUR
TI - Reducing the Clipping Noise in OFDM Systems by Using Oversampling Scheme
T2 - IEICE TRANSACTIONS on Communications
SP - 3082
EP - 3086
AU - Linjun WU
AU - Shihua ZHU
PY - 2005
DO - 10.1093/ietcom/e88-b.7.3082
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E88-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2005
AB - In an Orthogonal Frequency Division Multiplexing (OFDM) systems, the Peak to Average power Ratio (PAR) is high. The clipping signal scheme is a useful and simple method to reduce the PAR. However, it introduces additional noise that degrades the systems performance. We propose an oversampling scheme to deal with the received signal in order to reduce the clipping noise by using finite impulse response (FIR) filter. Coefficients of the filter are obtained by correlation function of the received signal and the oversampling information at receiver. The performance of the proposed technique is evaluated for frequency selective channel. Results show that the proposed scheme can mitigate the clipping noise significantly for OFDM systems and in order to maintain the system's capacity, the clipping ratio should be larger than 2.5.
ER -