G. B. CHENG ET AL.
Copyright © 2013 SciRes. CN
397
has little effect on the out-of-band removal and it even
becomes worse when threshold is high, e.g., threshold =
8dB in Figure 3. On the other hand, since the clipping
noise removal process includes the same process in
transmitter, the including out-of-band removal will
largely increase the computation complexity.
5. Conclusions
The reduction of clipping noise in OFDM/OQAM system
is discussed in this paper. It is shown that the system
performance can be largely recovered through iterative
clipping noise cancellation. Furthermore, since the out-
of-band radiation of the clipped signal is at a consider-
able low level, there is no necessary to include the out-
of-band filtering process in OFDM/OQAM system.
6. Acknowledgements
This work is supported in part by the National Science
Foundation of China under Grant number 61101101,
National Grand Special Science and Technology Project
of China under Grant No. 2010ZX03006-002-02, , Pro-
gram for New Century Excellent Talents in University of
China ((NCET110058), the Foundation Project of Na-
tional Key Laboratory of Science and Technology on
Communications under Grant 9140C020404120C0201,
and Key Laboratory of Universal Wireless Communica-
tions, Beijing university of Posts and Telecommunica-
tions, Ministry of Education, China (No. KFKT-
2012102).
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