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基于幅度预矫正降低OFDM系统PAPR的方法 被引量：1

Reduction of Peak to Average Power Ratio of OFDM System Based on Amplitude Predistortion
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摘要 本文针对幅度预矫正技术在降低OFDM系统PAPR(peak-to-average power ratio)的同时增加了系统平均功率的缺点,采用对部分输入符号进行两个相反方向的放大和缩小,以达到进一步降低系统PAPR,并且降低系统平均功率的目的。分析及仿真结果表明,在保证系统在AWGN信道中的误比特率性能的前提下,在概率为10^(-4)处,改进后的方法比原方法PAPR降低了0.6dB,系统平均功率也有明显降低。本文方法具有算法简单、不产生失真,不发送边带信息及灵活性高,且易于与其他降低PAPR技术结合使用等特点,具有较好的实用价值。 In this paper, we reshape the input symbols in two opposite directions to reduce peak-to-average power ratio（PAPR） and the average power of orthogonal frequency division multiplexing（ OFDM）, because the amplitude predistortion increases the average power of OFDM system while reducing PAPR. Based on ensuring the performance of BER in AWGN channel, the analysis and simula- tion results show that the modified scheme can reduce PAPR 0.6dB more than the original scheme at probability of IO4 ,it also reduces the average power of OFDM system. The proposed scheme is simple, highly flexible without distortion or side information. It is convenient to be combined with other techniques, and valuable to be applied.
作者 肖丽萍 王嘉嘉
机构地区 燕山大学信息科学与工程学院
出处 《信号处理》 CSCD 北大核心 2009年第6期981-984,共4页 Journal of Signal Processing
关键词 正交频分复用(OFDM) 幅度预矫正 峰均功率比(PAPR) orthogonal frequency division multiplexing（OFDM） amplitude predistortion peak-to-average power ratio（PAPR）
分类号 TN911.7 [电子电信—通信与信息系统]
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参考文献9

  • 1Serdar Sezginer and Hikmet Sari. PEAK POWER REDUCTION IN OFDM SYSTEMS USING DYNAMIC CONSTELLATION SHAPING. Proceedings of EUSIPCO 2005, September 2005.
  • 2Serdar Sezginer and Hikmet Sari. OFDM Peak Power Reduction with Simple Amplitude Predistortion. IEEE Communications Letters, February, 2006, v 10, n 2, p 65- 67.
  • 3Luqing Wang and Chintha Tellambura. A Simplified Clipping and Filtering Technique for PAR Reduction in OFDM Systems. IEEE SIGNAL PROCESSING LETFERS, VOL. 12 ,NO. 6,JUNE 2005. p 453-456.
  • 4Yaron Handali, Itamar Nizan and Dov Wulich. On channel capacity of OFDM with SLM method for PAPR reduction. 2006 IEEE 24th Convention of Electrical and Electronics Engineers in Israel. 2006. p 138-140.
  • 5Sang-Woo Kim, Jin-Kook Chung and Heung-Gyoon Ryu. PAPR Reduction of the OFDM Signal by the SLM-based WHT and DSI Method. IEEE Region 10 Annual International Conference. 2006. p 4142156.
  • 6Amin Mobasher and Amir K. Khandani. PAPR Reduction Using Integer Structures In OFDM Systems. IEEE Vehicular Technology Conference, 2004, v 60, n 1, p 650- 654.
  • 7贺中堂,张力军,姬国庆.基于Hadamard矩阵变换降低OFDM系统PAPR的新算法[J].信号处理,2006,22(6):883-886. 被引量：2
  • 8Brian Scott Krongold and Douglas L. Jones . PAR Reduction in OFDM via Active Constellation Extension. IEEE Trans. Broadcasting, Sept. 2003, v 49, n 3, pp. 258-268.
  • 9Pongsakorn Boonsrimuang, Pisit Boonsrimuang, Kazuo Mori,Tawil Paungma and Hideo Kobayashi. PAPR Reduction Method for OFDM Signal by Using Dummy Sub-carriers. 2006 1st International Symposium on Wireless Pervasive Computing,2006 ,v 2006 ,p 1-5.

二级参考文献12

  • 1S. H. Muller and J. B. Hubber," OFDM with reduced peakto-average power ratio by optimum combination of partial transmit sequences, "Electron. Lett, vol. 33, no. 5, pp. 368- 369, Feb. 1997.
  • 2H. Yu and G. Wei," Computation of the continuous-time PAR of an OFDM signal," in International Conference on Acoustics,Speech and Signal Processing ( ICASSP' 03 ),Hong Kong, China,6 - 10 April 2003, IEEE ,pp. Ⅳ-529 -31,IEEE.
  • 3B. S. Krongold and D. L. Jones," PAR Reduction in OFDM via Active Constellation Extension," IEEE Tram. Broadcasting, vol. 49, no. 3, pp. 258 - 268, Sept. 2003.
  • 4H. K. Kwok, Shape Up: Peak-Power Reduction via Constellation Shaping, Ph. D. thesis, University of Illinois,2001.
  • 5H. K. Kwok and D. L. Jones,"PAR Reduction for Hadamard Transform-Based OFDM," in 34th Conference on-Signal, Systems, and Computers, Princeton, NJ, March 15 - 17 2000.
  • 6H. K. Kwok and D. L. Jones,"PAR Reduction via Constellation Shaping," in 2000 International Symposium on Information Theory, Sorrento, Italy, June 25 - 30 2000.
  • 7Myonghee Park and Heeyoung Jun," PAPR Reduction in OFDM Transmission using Hadamard Transform,"2000 IEEE Trans pp 430 - 433.
  • 8A. Mobasher and A. K. Khandani, "PAPR Reduction Using Integer Structures in OFDM Systems," Submitted to IEEE Trans. on Comm , June 2004.
  • 9A. Mobasher and A. K. Khandani," PAPR Reduction Using Integer Structures in OFDM Systems," Technical Report UW-E&CE 2004.
  • 10Paul J Shlichta "High Dimensional Hadamard Matrices"IEEE Trans VOL. IT - 25, No. 5 1979.

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信号处理
2009年 第6期

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