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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林茂昭 | |
dc.contributor.author | Yu-Hung Lo | en |
dc.contributor.author | 羅于洪 | zh_TW |
dc.date.accessioned | 2021-06-13T02:03:56Z | - |
dc.date.available | 2008-07-16 | |
dc.date.copyright | 2007-07-16 | |
dc.date.issued | 2007 | |
dc.date.submitted | 2007-07-03 | |
dc.identifier.citation | [1] H. J. V. Tarokh and A. R. Calderbank, Space-time block codes from orthogonal
designs,' Information Theory, IEEE Transactions on, pp. 1456{1467, Jul. 1999. [2] N. S. V. Tarokh and A. R. Calderbank, Space-time codes for high data rate wire- less communication: Performance criteria and code construction,' IEEE Trans. Inform. Theory, pp. 744{764, Mar. 1998. [3] G. B. S. Baro and A. Hansmann, Improved codes for space-time trellis-coded modulation,' Communications Letters, IEEE, pp. 20{22, Jan. 2000. [4] G. J. Jr., Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas,' Bell Labs Tech. J., pp. 41{59, 1996. [5] S. Alamouti, A simple transmit diversity technique for wireless communica- tions,' IEEE Journal on Selected Areas in Communications, vol. 16, pp. 1451{ 1458, Oct 1998. 51 52 BIBLIOGRAPHY [6] C. W.H. and S. H.J., New optimal rate-diversity tradeo space-time codes with adaptive iterative decoding,' ISITA, Oct 2006. [7] G.Yi and K. B.Letaief, Performance evaluation and analysis of space-time cod- ing in unequalized multipath fading links,' IEEE Trans. Commun., Nov. 2000. [8] L. J. Jr., Analysis and simulation of a digital mobile channel using orthogonal frequency division multiplexing,' IEEE Trans. Commun., pp. 665{675, Jul. 1995. [9] A. Bolcskei, H. Paulraj, Space-frequency coded broadband ofdm systems,' in Proc. 48th IEEE Vehicular Technology Conf., vol. 1, pp. 1{6, Sep. 2000. [10] A. N. D. Agarwal, V. Tarokh and N. Seshadri, Space-time coded ofdm for high data rate wireless communication over wideband channels,' in Proc. 48th IEEE Vehicular Technology Conf., pp. 2232{2236, May 1998. [11] R. F. R. Bauml and J. Huber, Reducing the peak-to-average power ratio of multicarrier modulation by selected mapping,' Electronic Letters, pp. 2056{2057, 1996. [12] G. W. J. V. Eetvelt and M. Tomlinson, Peak to average power reduction for ofdm schemes by selective scrambling,' Electronic Letters, pp. 1963{1964, 1996. [13] B. Krongold and D. Jones, Par reduction in ofdm via active constellation ex- tension,' IEEE Trans. Broadcasting, pp. 258{268, Sep. 2003. BIBLIOGRAPHY 53 [14] Z. M. Tan and Y.Bar-Ness, Stbc mimo-ofdm peak power reduction by cross- antenna rotation and inversion,' IEEE commun. Lett., vol. 9, pp. 592{594, Jul. 2005. [15] B. Vucetic and J. Yuan, Space-time coding,' [16] M. O. Weifeng Su, Zolan Safar and K. J. R. Liu, Obtaining full-diversity space- frequency codes from space-time codes via mapping,' IEEE Transaction on Sig- nal Processing, vol. 51, pp. 2905{2916, 2003. [17] B. Lu and X. Wang, Space-time code design in ofdm systems,' Proc. Globecom., vol. 2, pp. 1000{1004, 2000. [18] R. Gallager, Low density parity check codes,' IRE Trans. Inform. Theory, vol. 8, pp. 21{28, Jan 1962. [19] J. Wiley, Error correction coding.-methematical methods and algorithms,' 2005. [20] J. S.ten Brink and R.Yan, Iterative demapping and decoding for multilevel modulation,' in Proc. GLOBECOM, pp. 579{584, Nov. 1998. [21] X. W. Ben Lu and K. R. Narayanan, Ldpc-based space-time coded ofdm systems over correlated fading channels: Performance analysis and receiver design,' IEEE transactions on communication, vol. 50, pp. 74{88, Jan. 2002. 54 BIBLIOGRAPHY [22] A. A. Stephan ten Brink, Gerhard Kramer, Design of low-density parity-check codes for modulation and detecton,' IEEE transactions on communication, vol. 52, pp. 670{677, Apr. 2004. [23] G. Y. Ben Lu and X. Wang, Performance analysis and design optimization of ldpc-coded mimo ofdm systems,' IEEE transactions on signal processing, vol. 52, pp. 348{361, Feb. 2004. [24] J. H. S. J. B. S. M. Jeongseok Ha, Apurva Mody and G. Stuber, Ldpc coded ofdm with alamouti/svd diversity technique,' [25] G. Stuber, Priciples of mobile communication,' 2001. [26] S.-K. Deng, A study on papr of ofdm systems,' Graduate Institute of Commu- nication Engeineering National Taiwan University doctoral thesis, 2007. [27] C. Tellambura, Phase optimisation criterion for reducing peak-to-average power ratio in ofdm,' Elect. Lett., pp. 169{170, Jan. 1998. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/30444 | - |
dc.description.abstract | 在多輸入多輸出正交分頻多工系統中,空頻碼已經有廣泛的研究與討論。在這篇報告中,在兩根傳送天線的情形下,我們討論的空頻碼是把低密度同位檢查碼與阿拉姆提碼串連連結而成。也基於此種空頻碼,我們提出一種如何簡單的降低峰均值功率比之技術。因為這個技術只需在時域上做運算,而不須要在頻域上來做運算,因此傳統上使用選擇性對應技術時,會有反向離散快速傅立葉轉換計算量很大的缺點,但在此技術下會大量的減低到只需要兩個。此提出的技術用在較少的候選數目時會比較優良,不但可以簡化系統而且也不會犧牲掉錯誤率,這些結果最後都會用電腦把它模擬出來。 | zh_TW |
dc.description.abstract | We consider the problem of space-frequency (SF) codes design for multiple-input-multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) modulation in frequency-selective Rayleigh fading channel.
To combat frequency-selective channel and to provide a channel coding gain, we combine low-density-parity-check (LDPC) codes and Alamouti scheme. The resulting codes are shown to be capable of achieving the diversity and coding gain in multi-path fading channel. Also, a new method is proposed for the peak-to-average power ratio (PAPR) reduction of OFDM signals. Compared with the scheme of cross-antenna rotation and inversion (CARI), which utilizes additional degrees of freedom by employing multiple antennas. However, CARI requires invoking the IFFT process several times per transmitted OFDM symbol. The proposed method requires only two IFFT operations by using time domain modification. In case the number of candidates is not great (no more than 16), the proposed technique can significantly reduce the complexity without sacrificing the PAPR reduction capability and error performance. Simulation results verify the advantage of the proposed PAPR reduction technique. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T02:03:56Z (GMT). No. of bitstreams: 1 ntu-96-R94942113-1.pdf: 796133 bytes, checksum: 960fdd24bae9f7bbd990c927a708c604 (MD5) Previous issue date: 2007 | en |
dc.description.tableofcontents | Contents
1 INTRODUCTION 1 2 SYSTEM MODEL 4 2.1 Space-Time Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Space-Frequency (SF) Codes . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.1 System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.2 Design Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 LDPC Coded Alamouti Scheme in MIMO OFDM 13 3.1 LDPC Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.2 Alamouti ST Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.3 Considered SF Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.3.1 Decoding of LDPC-Coded Alamouti SF Codes . . . . . . . . . 23 3.4 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 iii 4 PAPR Reduction in MIMO OFDM System 31 4.1 PAPR Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.1.1 One OFDM Symbol . . . . . . . . . . . . . . . . . . . . . . . 32 4.1.2 MIMO OFDM . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.2 CARI Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4.3 Time-Domain Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . 38 4.3.1 Time-Domain Circular Shift Scheme . . . . . . . . . . . . . . 38 4.3.2 Modied Time-Domain Circular Shift Scheme . . . . . . . . . 41 4.4 Simulation Result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 4.4.1 CCDF Performance . . . . . . . . . . . . . . . . . . . . . . . . 43 4.4.2 BER Performance . . . . . . . . . . . . . . . . . . . . . . . . . 45 5 CONCLUSION 49 Bibliography 51 iv | |
dc.language.iso | en | |
dc.title | 在MIMO-OFDM系統中於時域上峰均值功率比之降低方法 | zh_TW |
dc.title | A Time-Domain PAPR Reduction Scheme for Coded MIMO OFDM | en |
dc.type | Thesis | |
dc.date.schoolyear | 95-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 蘇賜麟,韓永祥,趙啟超,蘇育德 | |
dc.subject.keyword | 空頻碼,峰均值功率比,時域,低密度同位檢查碼,阿拉姆提碼, | zh_TW |
dc.subject.keyword | Alamouti code,Low-density parity-check (LDPC) codes,peak-to-average power ratio,space-frequency codes,time domain, | en |
dc.relation.page | 54 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2007-07-05 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
顯示於系所單位: | 電信工程學研究所 |
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