NDLI: Hybrid Combination of N-Continuous and Null-Space Precoding for Out-of-Band Emission Suppression

Content Provider	IEEE Xplore Digital Library
Author	Zihao You Fang, J. I-Tai Lu
Copyright Year	2013
Description	Author affiliation: Dept. of ECE, Polytech. Inst. of NYU, New York, NY, USA (Zihao You; Fang, J.; I-Tai Lu)
Abstract	Orthogonal frequency division multiplexing (OFDM) based cognitive radio (CR) systems suffer from the large out-of-band emission (OOBE) that interferes with other users. Among the schemes that have been proposed to reduce the OOBE, precoding techniques encode the input data vectors before the inverse fast Fourier transform (IFFT) process, and decode them at the receiver after the fast Fourier transform (FFT) process. They provide significant OOBE suppression and do not cause any degradation of bit error rate (BER) performance. Therefore, two existing precoding techniques, which in this paper are called SVD precoding and N-continuous precoding, are investigated in this paper. Then a combined approach which maintains the merits of these two techniques is proposed. Numerical results show that, no matter whether there is a cyclic prefix (CP) or not, the proposed method gives significant further improvement on OOBE suppression and almost no extra degradation in the system performances such as the increase of BER or peak-to-average power ratio (PAPR) than either of the two original techniques.
Sponsorship	IEEE Commun. Soc.
Starting Page	1576
Ending Page	1580
File Size	300962
Page Count	5
File Format	PDF
ISBN	9780769551241
DOI	10.1109/MILCOM.2013.266
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-11-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vectors Bit error rate Encoding Decoding Peak to average power ratio Iterative decoding precoding OFDM cognitive radio out-of-band emission
Content Type	Text
Resource Type	Article

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