Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7838
標題: 使用哈達碼轉換/反離散傅立葉轉換作為正交分頻多工系統之預轉換藉部分傳輸序列來降低峰均值比
Using WHT/IDFT as the Pre-Transform in OFDM System to Reduce PAPR by Partial Transmit Sequence
作者: 劉郁旻
Liu, Yu-Ming
關鍵字: PTS
部分傳輸序列
WHT
IDFT
OFDM
PAPR
Pre-Transform
哈達碼轉換
正交分頻多工
高峰均值比
預轉換
出版社: 電機工程學系所
引用: [1] R. V. Nee and R. Prasad, OFDM for Wireless Multimedia Communications, Artech House, Boston, 2000 [2] L. J. Cinimi Jr."Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing” IEEE Trans. Commun., vol. COM-33,no.7 ,pp.665-675, Jul. ,1985 [3] E. C. Ifeachor and B. W. Jervis, Digital Signal Proce- ssing, ed., Prentice Hall, 2002 [4] R. W. Chang, “Synthesis of band-limit orthogonal signals for multichannel data transmission,”Bell Syst. Tech. J.,vol.45, pp.1775-1796, Dec.1966 [5] R. W. Chang and R. A. Gibbey."A theoretical study of performance of an orthogonal multiplexing data trans- mission scheme,” IEEE Trans. Commun.,vol.COM-16,pp. 529-540, Aug.1968 [6] Mosier, R. R., and R. G. Clabaugh,“Kineplex,a Band- width Efficient Binary Transmission System," AIEE Trans., vol.76, pp.723-728, Jan.1958 [7] Porter, G. C.,“Error Distribution and Diversity Performance of a Frequency Differential PSK HF modem, " IEEE Trans. Commun. vol..COM-16, pp.567-575, Aug. 1968 [8] Zimmerman, M. S., and A. L. Kirsch,"The AN/GSC-10 (KAT HRYN) variable rate data modem for HF radio," IEEE Trans.Commun. vol.,COM-15, pp.197-205,Apr. 1967 [9] S. H. .Han and J. H. Lee, ”An Overview of Peak-to- Average Power Ratio Reduction Techniques for Multi- carrier Transmission, ”IEEE Wireless Commun.,vol:12 issue:2, pp.56-65, April 2005 [10] T. Jiang and Y. Wu, ”An Overview : Peak-to-Average Power Ratio Reduction Techniques for OFDM Signals” IEEE Trans. Broadcas., vol.54, issue.2, pp.257-268, June 2008 [11] S.H. Müller and J. B. Huber, ”OFDM with reduced peak- to-average power ratio by optimum combination of partial transmit sequences,”Electron. Lett., vol.33, p.368, Feb.1997 [12] S. G. Kang and J. G. Kim,"A Novel Subblock Partition Scheme for Partial Transmit Sequence OFDM,"IEEE Trans. Broadcas., vol:45 issue:3, pp.333-338, Sept.1999 [13] S. Lin and D. J. Costello. Jr.,”Error Control Coding, 2nd ed.,”Prentice Hall,2004 [14] L. J. Cimini, Jr. and N. R. Sollenberger.”Peak-to- Average Power Ratio Reduction of an OFDM Signal Using Partial Transmit Sequences,”IEEE Communications Lett. ,vol:4 issue:3, pp.86-88, Mar. 2000 [15] L. J. Cimini, Jr. and N. R. Sollenberger,”Peak-to- Average Power Ratio Reduction of an OFDM Signal Using Partial Transmit Sequences,”IEEE ICC'99, vol.1, pp. 511-515, Jun. 1999 [16] O. J. Kwon and Y. H. Ha, “Multi-Carrier”PAP Reduc- tion Method Using Sub-Optimal PTS With Threshold,” IEEE Trans. Broadcas., vol.49,no.2, pp.232-236,Jun. 2003 [17] S. H. Han and J. H. Lee,”PAPR Reduction of OFDM Signals Using a Reduced Complexity PTS Technique,” IEEE Signal Processing Lett.,vol.11, no.11,pp.887- 890, Nov. 2004 [18] L. Yang, R. S. Chen, Y. M. Siu and K. K. Soo,”PAPR Reduction of an OFDM Signal by Use of PTS With Low Computational Complexity,”IEEE Trans.Broadcas., vol. 52, no.1, pp.83-86, Mar. 2006 [19] M. Park, H. Jun, J. Cho, N. Cho, D. Hong and C. Kang, ”PAPR Reduction in OFDM Transmission using Hadamard Transform,” IEEE ICC'00, vol.1, pp.430-433,Jun. 2000 [20] H. Chen and H. Liang, “Binary Golay Complementary Se- quences in Walsh-Hadamard Transformed OFDM Systems, IEEE International Symposium on Intelligent Signal Processing and Communication Systems, Japan, pp.999- 1002 , Dec.2006 [21] X. Zhu, G. Zhu and T. Jian,“A Novel Transformation Scheme for PAPR Reduction in OFDM Systems,” IEEE Trans. Wireless Commun., Oct. 2007 [22] C. Tellambura,"Upper bound on peak factor of N-multi- ple carriers,”Electron.Lett. vol.33, issue 19, 11, pp.1608-1609, Sept. 1997
摘要: 正交分頻多工(Orthogonal Frequency Division Multiplexing ,OFDM)系統為多載波傳輸系統的一個特例,OFDM系統中其中一個缺點就是高峰均值比(peak-to-average power ratio,PAPR)。當子載波的相位具某種特定組合的時候,所有的符元(symbol)功率將會一起加起來,這將會引起高的PAPR。 降低PAPR的方法有很多種,我們採用部分傳輸序列(Partial Transmit Sequence,PTS)系統當主系統,並使用在其系統中使用預轉換的觀念來降低PAPR,我們使用哈達碼轉換(Walsh-Hadamard Transform,WHT)以及反離散傅立葉轉換(Inverse Discrete Fourier Transform,IDFT)來當預轉換,根據預轉換的放置位置,針對每個預轉換我們可以得到兩個系統。 高運算複雜度一直是PTS系統的一個大缺點,針對這項缺點,我們採用一種降低複雜度演算法的觀念,把這些觀念放在不同預轉換系統中進行分析模擬。此外,為使PTS系統中的權重因子(weighting factor)具有錯誤更正的能力,我們對其編碼,並於不同預轉換系統中進行分析。 最後,我們會從各種模擬結果中得到不一樣的結論並且驗證了使用預轉換能改善PAPR的效能。
Orthogonal Frequency Division Multiplexing (OFDM) System is a special case of the multicarrier transmission system. One of the faults is the high peak-to-average power ratio( PAPR) in OFDM system. When subcarriesrs'' phase has certain combination, all of the symbol power summarize together.It causes the high PAPR. There are many ways to reduce PAPR. We select Partial Transmit Sequence (PTS) system as the main system and take the concept of the pre-transform in the PTS system to re duce PAPR. We use the Walsh-Hadamard Transform (WHT) and Inverse Discrete Fourier Transform (IDFT) as the pre-transform. According to the pre-transform's location ,we can get the two systems for every pre-transform. High computation complexity is always the big fault of the PTS system. We will take a concept of reduction complexity algorithm for this fault and use this concept to simulate and analyze for different pre-transform systems. Besides, in order to let the weighting factor of the PTS system has error correcting ability, we encodes it and analyze for different pre-transform systems. Finally, we have the different conclusions from every simulation results and prove that using pre-transform can improve PAPR reduction performance.
URI: http://hdl.handle.net/11455/7838
其他識別: U0005-0208200801383200
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-0208200801383200
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