A Novel Approach for PAPR Reduction of NC-OFDM System

Abstract:

Although Non-continuous OFDM (NC-OFDM) has the unique advantage of eliminating interference to authorized user in cognitive radio context, it also confronts a difficulty of reducing peak to average power ratio (PAPR) like other OFDM techniques. In this paper, carrier interferometry is proposed to apply in NC-OFDM system in order to reduce its PAPR using the construction feature of CI code itself. The coding principle of CI code is analyzed at first. Then NC-OFDM base-band system based on carrier interferometry (CI/NC-OFDM) is modeled. Theoretical analysis and matlab simulation results indicate that CI code can bring 3 dB lower PAPR reference with the same probability of exceeding some PAPR reference, compared with traditional NC-OFDM system. This method is effective and feasible and gets better BER performance as well.

• Periodical: Applied Mechanics and Materials (Volumes 519-520)
• Pages: 1021-1026
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.519-520.1021
• Online since: February 2014
• Authors: Hui Fang
• Keywords: CI Code, NC-OFDM, PAPR

References

[1] J.D. Poston and W.D. Home: Discontiguous OFDM considerations for dynamic spectrum access in idle TV channels[J], in Proc. IEEE Int. Symp New Frontiers Dynamic Spectr Access Network Vol. 1(2005), pp.607-610.

DOI: 10.1109/dyspan.2005.1542679

[2] H. Tang: Some physical layer issues of wide-band cognitive radio systems[J], in Proc. IEEE Int. Symp New Frontiers Dynamic Spectr Access Network, Vol. 1(2005), pp.151-159.

DOI: 10.1109/dyspan.2005.1542630

[3] Rakesh Rajbanshi, Alexander M, Wyglinski, et al: An EffiCIent Implementation of NC-OFDM Transceivers for Cognitive[J], IEEE(2006).

DOI: 10.1109/crowncom.2006.363452

[4] K. Sathananthan,C. Tellambura: Coding to reduce both PAR and PICR of anOFDM signal[J], IEEE Communications Letters, Vol. 6(2002): 316-318.

DOI: 10.1109/lcomm.2002.802065

[5] Li Xiaodong, Leonard J. CImim Jr: Effects of clipping and filtering on the performance of OFDM[J], IEEE Communications LeRers, Vol. 2(1998), pp.131-133.

DOI: 10.1109/4234.673657

[6] Homayotm Nikookar, Knut Sverre Lidsheim: Random phase updating algorithm for OFDM transmission with low PAPR[J], IEEE Transactions on Broadcasting, Vol . 48(2002), pp.123-128.

DOI: 10.1109/tbc.2002.1021278

[7] Lei Jun, Wu Le-Nan.: Analysis of Carrier Interferometry OFDM[J], Journal of Electronics & Information Technology. Vol. 28. No. 8 (2006).

[8] He jianhui, Zhou We, Men AiDong: Analysis of the Peak to Average Power Ratio Character of Carrier Interferometry OFDM System[J], Radio Engineering . Vol. 35. No. 12(2005).

[9] Wiegandt D A, Nassar C R, Wu Zhiqiang: Overcoming peak-to-average power ratio issues in OFDM via carrier-interferometry codes[C], IEEE 54th Vehicular Techn-ology Conference (VTC'01 Fall), Vol. 2, Atlantic CIty, NJ, USA( 2001), pp.660-663.

DOI: 10.1109/vtc.2001.956852

[10] Wiegandt D A, Nassar C R, Wu Zhiqiang: The eli-mination of peak-to-average power ratio concerns in OFDM via carrier interferometry spreading codes: a multip-le constellation analysis[C], IEEE 36th Southeastern Sympo-sium on System Theory(SSST'04), Atlanta, Georgia, US-A(2004).

DOI: 10.1109/ssst.2004.1295673

[11] Rakesh Rajbanshi, Alexander M, Gary J: Peak-to-Average Power Ratio Analysis for NC-OFDM Transmissions[C], Vehicular Technology Conference, VTC-2007 Fall. 2007 IEEE 66th (2007), pp.1351-1355.

DOI: 10.1109/vetecf.2007.289

[12] Office for Offical Publications of the European Communities, Luxemboreg, COST 207: Digital land mobile radio communications, final report(1989).