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Design of Tone-Controlled CI/OFDM Communication System and Improvement of BER Performance by IMD Reduction  

Kim, Seon-Ae (충북대학교 전자공학과 및 컴퓨터정보통신연구소)
Lee, Il-Jin (충북대학교 전자공학과 및 컴퓨터정보통신연구소)
Baek, Gwang-Hoon (충북대학교 전자공학과 및 컴퓨터정보통신연구소)
Ryu, Heung-Gyoon (충북대학교 전자공학과 및 컴퓨터정보통신연구소)
Abstract
OFDM(orthogonal frequency division multiplexing) is very effective forhigh data rate transmission system. However, communication performance becomes worse because of nonlinear distortion resulting from the PAPR. In this paper, we like to propose a tone-controlled CI/OFDM system including the TMD (inter-modulation distortion) reduction method in order to improve the BER performance. In this tone-controlled CI/OFDM system, control tone is additionally inserted in each data symbol of CI/OFDM system to make the CI/OFDM lower the PAPR and robust to nonlinear distortion. So, tone-controlled CI/OFDM using the IMD reduction method shows better BER (bit error rate) performance than methods based on PAPR reduction.
Keywords
OFDM; tone control; carrier interferometry; IMD; PAPR (peak-to-average power ratio);
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