NC-OSDM transmission for ICI cancelation in high speed mobile systems

Abstract

Non-Contiguous Orthogonal Frequency Division Multiplexing (NC-OFDM) system is used in the wide-band communications, especially for the wide-band cognitive radio, e. g., IEEE 802.22. However, in the high speed mobile environment, NC-OFDM suffers from Inter-Carrier Interference (ICI). Due to the non-uniformed Doppler spread in the wide-band, it is not efficient to use the traditional ICI cancelation schemes. In this paper, the NC-OSDM transmission system is proposed for ICI cancelation under this circumstance. With the performance evaluation, NC-OSDM outperforms over the equivalent NC-OFDM 15dB in the power of ICI interference. Also, the mobile speed of the vehicles or aircrafts can be improved approximately about twice.