Reducing the Clipping Noise in OFDM Systems by Using Oversampling Scheme(Wireless Communication Technologies)
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概要
- 論文の詳細を見る
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.
- 社団法人電子情報通信学会の論文
- 2005-07-01
著者
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Zhu Shihua
Xi'an Jiaotong Univ. Xi'an Chn
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Zhu Shihua
School Of Electronics And Information Engineering Xi'an Jiaotong University
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WU Linjun
School of Electronics and Information Engineering, Xi'an Jiaotong University
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Wu Linjun
School Of Electronics And Information Engineering Xi'an Jiaotong University
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- Reducing the Clipping Noise in OFDM Systems by Using Oversampling Scheme(Wireless Communication Technologies)