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http://dx.doi.org/10.5515/KJKIEES.2010.21.4.399

ICI and Compensation Algorithm against Frequency Offset and Phase Noise in SC-FDMA System with Comb Type Pilot  

Ryu, Sang-Burm (Department of Electronic Engineering, Research Institute of Computer, Information & Communication, Chungbuk National University)
Ryu, Heung-Gyoon (Department of Electronic Engineering, Research Institute of Computer, Information & Communication, Chungbuk National University)
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Abstract
SC-FDMA system uses DFT-spreading method for reducing the PAPR of OFDM signal, which improves the power efficiency. Block type pilot is used in SC-FDMA system. However, there are ICI due to the inevitable phase noise and frequency offset that can be generated from the Doppler frequency and inaccuracy between the transceiver oscillators. This ICI definitely degrades the BER performance. To overcome this problem and estimate the channel efficiently, we like to propose ICI compensation algorithm for the SC-FDMA system with comb type pilot. SLM method is additionally included for the PAPR reduction when pilot is assigned in comb type. Finally, it is confirmed that the ICI due to the phase noise and frequency offset is efficiently compensated by the suggested algorithm.
Keywords
SC-FDMA; Comb Type Pilot; ICI; Frequency Offset; Phase Noise;
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