Theoretical analysis of ICI self-cancellation in OFDM systems over Rayleigh flat-fading channels

2011 ◽  
Vol 18 ◽  
pp. 6-12 ◽  
Author(s):  
Zhi-hui ZHANG ◽  
Yin WANG ◽  
Tao DUAN
Keyword(s):  
Theoretical Analysis ◽  
Fading Channels ◽  
Ofdm Systems ◽  
Flat Fading

CLIPPING DISTORTION SUPPRESSION IN OVERSAMPLED CODED OFDM SYSTEMS USING A NOVEL SOFT DECODING PROCEDURE

2008 ◽  
Vol 08 (03n04) ◽  
pp. L349-L357
Author(s):  
RUHOLLAH ALI-HEMMATI ◽  
PAEIZ AZMI
Keyword(s):  
Fading Channels ◽  
Ofdm Systems ◽  
Selective Fading ◽  
Ofdm System ◽  
Soft Decoding ◽  
Flat Fading ◽  
Selective Channel ◽  
Coded Ofdm ◽  
Clipping Distortion ◽  
Ofdm Signals

In this paper, a soft decoding method is proposed for QAM-modulated coded OFDM systems. This technique efficiently mitigates the distortion caused by clipping the oversampled-OFDM signals. Because the main advantage of an OFDM system is its robustness in fading channels, where this system turns a frequency selective channel into a set of parallel flat non-selective fading sub-channels, in this paper, we analyze the performance of the proposed method over flat fading Rician sub-channels. Our simulation results show that the proposed soft decoding technique significantly outper-forms the conventional hard decoding method.

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