volume | PIER Journals

Abstract

Peak to Average Power Ratio (PAPR) is one of the serious problems in any wireless communication systems using multi carrier modulation technique like OFDM, which reduces the efficiency of transmit high power amplifier. In this paper, proposed scheme will be introduced that combines interleaving technique and companding technique to reduce PAPR. This scheme will be compared with the system that uses other technique for reduction which is the clipping method. By using proposed scheme, the PAPR of OFDM signal can be reduced by 6.3 dB over the original system, i.e., without PAPR reduction. Also, SNR decreases by more than 5 dB for Bit Error Rate(BER) of 10^-3 over the original system. Moreover, the proposed method gives improvement more than 4.5 dB for BER of 10^-3 over the system that uses clipping. All these systems will be evaluated in the presence of nonlinear power amplifier.

1. Nee, R. V. and R. Prasad, OFDM for Wireless Multimedia Communications, Artech House Publishers, Norwood, MA, Jan. 2000.

2. Lee, Y.-D., D.-H. Park, and H.-K. Song, "Improved channel estimation and MAI-robust schemes for wireless OFDMA system," Progress In Electromagnetics Research, Vol. 81, 213-223, 2008.
doi:10.2528/PIER08010403 Google Scholar

3. Liu, P., "A new peak to average power ratio reduction schemes for OFDM system," Master dissertation, 2004. Google Scholar

4. Gross, R. and D. Veeneman, "Clipping distortion, in DMT ADSL systems," IEEE Electron. Letter, Vol. 29, 2080-2081, Nov. 1993.
doi:10.1049/el:19931389 Google Scholar

5. Davis, J. A. and J. Jedwab, "Peak-to-mean power control in OFDM, Golay complementary sequences, and Reed-Muller codes," IEEE Trans. Inform. Theory, Vol. 45, 2397-2417, Nov. 1999.
doi:10.1109/18.796380 Google Scholar

6. Krongold, B. S. and D. L. Jones, "PAPRreduction in OFDM via active constellation extension," IEEE Trans. on Broadcasting, Vol. 49, 258-268, Sept. 2003.
doi:10.1109/TBC.2003.817088 Google Scholar

7. Muller, S. H. and J. B. Huber, "OFDM with reduced peak-to-average power ratio by optimum combination of partial transmit sequences," IEEE Electron. Letter, Vol. 33, 368-369, Feb. 1997.
doi:10.1049/el:19970266 Google Scholar

8. Yung, C., K. Shang, C. Kuan, and C. Mao, "Turbo coded OFDM for reducing PAPRand error rates," IEEE Transactions on Wireless for Communications, Vol. 7, No. 1, Jan. 2008. Google Scholar

9. Han, S. H. and S. H., "An overview of peak-to-average power ratio reduction techniques for multicarrier transmission," IEEE Wireless Communications, 56-65, Apr. 2005. Google Scholar

10. Proakis, J. G. and M. Salehi, Communication Systems Engineering, Prentice-Hall, Inc., 1994.

11. Jayalath, A. D. S. and C. Tellambura, "Use of data permutation to reduce the peak-to-average power ratio of an OFDM signal," Wirel. Commun. Mob. Comput., Vol. 2, 187-203, 2002.
doi:10.1002/wcm.47 Google Scholar

12. Ciochina, C., F. Buda, and H. Sari, "An analysis of OFDM peak power reduction techniques for WiMAX systems," IEEE International Conference on Communications, Vol. 10, 4676-4681, ICC apos, Jun. 2006. Google Scholar

13. Gregorio, F. H., "Analysis and compensation of nonlinear power amplifier effects in multi antenna OFDM systems," Dissertation for the degree of Doctor of Science in Technology, 2007. Google Scholar

14. Armstrong, J., "New OFDM peak-to-average power reduction scheme," Vehicular Technology Conference, 756-760, May 2001.

15. Li, X. and L. J. Cimini, "Effects of clipping and filtering on the performance of. OFDM," IEEE Communication Letters, Vol. 2, 131-133, 1998. Google Scholar

16. Ochiai, H. and H. Imai, "Performance analysis of deliberately clipped OFDM signals," IEEE Trans. on Communications, Vol. 50, 89-101, Jan. 2002.
doi:10.1109/26.975762 Google Scholar

Dr. Hefdhallah Sakran

Dr. Mona Mohammed Shokair

Dr. Atef Elazm