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Modified Clipping for Iterative Decoding of Superposition Coding  

Yan, Yi-Er (Chonbuk National University)
Kim, Jeong-Ki (Chonbuk National University)
Chen, Zhu (Chonbuk National University)
Lee, Moon-Ho (Chonbuk National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.45, no.2, 2008 , pp. 44-51 More about this Journal
Abstract
In this paper, we propose a modified clipping scheme for iterative decoding of superposition coding system by losing less power than clipping scheme. Our proposed scheme in superposition coding system shows good performance in peak-to-average power ratio(PAPR) and system performance with the same Clipping Ratio especially in low Clipping Ratio case. Finally in order to alleviate the performance degradation due to clipping noises, we combine a soft compensation algorithm that is combined with soft-input-soft-output(SISO) decoding algorithms in an iterative manner proposed by [1][2]. Simulation results show that with the proposed scheme, most performance loss can be recovered.
Keywords
clipping; superposition; iterative decoding;
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