Summary
International Technical Conference on Circuits/Systems, Computers and Communications
2008
Session Number:P2
Session:
Number:P2-79
Advanced CI/OFDM System Robust to the Phase Noise
Seon-Ae Kim, Heung-Gyoon Ryu,
pp.-
Publication Date:2008/7/7
Online ISSN:2188-5079
Summary:
High PAPR (peak-to-average power ratio) and ICI (inter carrier interference) are serious problems in the OFDM (orthogonal frequency division multiplexing) system. Recently, CI/OFDM (carrier interferometry coded OFDM) system has been proposed for reducing the PAPR and it shows good PAPR reduction performance. However, the CI/OFDM system is very sensitive to the ICI (inter carrier interference) problem since the phase offset mismatch happens due to the frequency offset and phase noise. In this paper, we propose an ACI/OFDM (advanced-CI/OFDM) to simultaneously handle the PAPR and ICI problems for the overall BER performance improvement. This method basically increases the margin of phase offset in CI codes. Even though it shows a little bit higher PAPR than conventional CI/OFDM, but it improves the total BER performance. From the simulation results, we can show the performance comparison between the conventional OFDM, CI/OFDM and ACI/OFDM.