Hybrid combination of N-continuous and null-space precoding for out-of-band emission suppression

Zihao You, Juan Fang, I. Tai Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish (US)
Title of host publicationProceedings - 2013 IEEE Military Communications Conference, MILCOM 2013
Pages1576-1580
Number of pages5
DOIs
StatePublished - 2013
Event2013 IEEE Military Communications Conference, MILCOM 2013 - San Diego, CA, United States
Duration: Nov 18 2013Nov 20 2013

Publication series

NameProceedings - IEEE Military Communications Conference MILCOM

Other

Other2013 IEEE Military Communications Conference, MILCOM 2013
CountryUnited States
CitySan Diego, CA
Period11/18/1311/20/13

Keywords

  • Cognitive radio
  • OFDM
  • Out-of-band emission
  • Precoding

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    You, Z., Fang, J., & Lu, I. T. (2013). Hybrid combination of N-continuous and null-space precoding for out-of-band emission suppression. In Proceedings - 2013 IEEE Military Communications Conference, MILCOM 2013 (pp. 1576-1580). [6735848] (Proceedings - IEEE Military Communications Conference MILCOM). https://doi.org/10.1109/MILCOM.2013.266