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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 鐘嘉德 | |
dc.contributor.author | Hao-Ming Chen | en |
dc.contributor.author | 陳浩銘 | zh_TW |
dc.date.accessioned | 2021-06-15T06:48:52Z | - |
dc.date.available | 2016-07-06 | |
dc.date.copyright | 2011-07-06 | |
dc.date.issued | 2011 | |
dc.date.submitted | 2011-03-31 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/48205 | - |
dc.description.abstract | 在本篇論文中,我們繼續了頻譜預編碼正交分頻多工系統的後續研究。以下為主要的論文貢獻。
在第三章中,我們證明之前所設計給頻譜預編碼正交分頻多工訊號的預編碼限制於相同、均勻分布及零平均數的輸入統計資料下也可以適用並維持良好的頻譜特性於任意的輸入統計特性。我們並提出了新的頻譜預編碼與循環字首的預編碼限制並提出了新的預編碼,數值結果顯現我們提出的頻譜預編碼與循環字首訊號能比之前提出的頻譜預編碼與循環字首及區塊分割訊號有更高的頻譜緊緻度。 在第四章中,我們提出了新的可適性頻譜預編碼正交分頻及循環字首訊號於平坦衰減的通道下。藉由動態地調整預編碼參數及輸入訊號特性,我們於結果展現了較未編碼正交分頻多工及循環字首訊號及之前所設計的可適性頻譜預編碼正交分頻及循環字首訊號有更好的平均頻譜效率。 在第五章中,我們研究了頻譜預編碼正交分頻多工與循環字首及其多重存取。我們設計了給新提出的頻譜預編碼正交分頻多工與循環字首及其多重存取訊號的預編碼限制於任意的輸入統計特性下,以至於其功率頻譜旁葉下降的速率能達到 ,其中J為可設計的正整數。我們亦提出了一個新的找預編碼矩陣的程序可適用於頻譜預編碼正交分頻多重存取訊號下,藉由結果顯示,我們所設計的頻譜預編碼正交分頻多重存取訊號能比未編碼的正交分頻多重存取訊號有更好的頻譜使用效能。 在第六章中,我們研究了頻譜預編碼常數封幅正交分頻多工訊號。我們證明了之前所提出給頻譜預編碼正交分頻多工與循環字首的預編碼限制亦適用於新提出頻譜預編碼常數封幅正交分頻多工訊號,於是,之前所提出的預編碼矩陣也可以適用。藉由數值結果顯現我們所設計的頻譜預編碼常數封幅正交分頻多工訊號能比之前設計的頻譜預編碼常數封幅正交分頻多工區塊訊號有更好的頻譜緊緻度。 | zh_TW |
dc.description.abstract | In this thesis, further results of spectrally precoded orthogonal frequency-division signals (SP-OFDM) are investigated. The main contributions of this thesis are described in the following.
In Chap 3, SP-OFDM signals with arbitrary input data statistics are investigated. First, we show that all constraints and spectral precoders previously developed for SP-OFDM with independent and identically distributed and zero-mean data provide fast decaying spectral sidelobes for SP-OFDM with arbitrary input statistics. Next, a general constraint on spectral precoding is developed for SP-OFDM with cyclic prefix (SP-CP-OFDM), unconstrained guard ratios and arbitrary input data statistics to ensure very small power spectral sidelobes decaying asymptotically as f^{-2J-2}, with J a predesigned integer-valued parameter. Some spectral codes are proposed to meet this constraint. It is shown that the proposed SP-CP-OFDM signals can provide higher spectral compactness than previously designed SP-CP-OFDM with block partitioning. Adaptive SP-CP-OFDM (ASP-CP-OFDM) is studied in Chapter 4. The proposed spectral precoder in Chapter 3 for SP-CP-OFDM is applied to ASP-CP-OFDM on the fading channel. By jointly adapting the precoding order for spectral precoder and the component modulation, the proposed ASP-CP-OFDM is shown to outperform adaptive nonprecoded OFDM and previously designed ASP-CP-OFDM significantly in average spectral efficiency. In Chapter 5, SP-OFDM with multiple access and CP (SP-CP-OFDMA) is investigated. Specifically, a general constraint on spectral precoding is developed for proposed SP-CP-OFDMA signal formats with unconstrained guard ratios, arbitrary subcarrier allocation and input data statistics to ensure small power spectral sidelobes decaying asymptotically as f^{-2J-2}. A general procedure is proposed to facilitate the precoder design for SP-CP-OFDMA signals with arbitrary subcarrier allocation for each user and some spectral precoders are accordingly devised. It is shown that the proposed SP-CP-OFDMA signals can suppress sidelobe powers effectively and thus achieve higher spectral compactness than nonprecoded rectangularly-pulsed CP-OFDMA. In Chapter 6, a new spectral precoding scheme is developed for constant-envelope OFDM (CE-OFDM). Specifically, a precoding constraint is developed for the spectrally precoded CE-OFDM (SP-CE-OFDM) signal format with unconstrained guard ratios and arbitrary input data statistics to ensure small power spectral sidelobes decaying asymptotically as f^{-2J-2}. The proposed spectral codes for proposed SP-CP-OFDM signals in Chapter 3 are shown to meet the constraint and thus suited for SP-CE-OFDM. It is shown that the proposed SP-CE-OFDM signal format can provide much smaller spectral sidelobes than the previously designed SP-CE-OFDM block signals. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T06:48:52Z (GMT). No. of bitstreams: 1 ntu-100-F94942116-1.pdf: 1243454 bytes, checksum: e2d01ec0accf54af95cf17c3854acaa9 (MD5) Previous issue date: 2011 | en |
dc.description.tableofcontents | Abstract i
Contents iii List of Figures v List of Tables viii 1 Introduction 1 1.1 OFDM, OFDMA and CE-OFDM Systems . . . . . . . . . . . . . . . . . . . 1 1.2 SpectralBehavior andSidelobeSuppression . . . . . . . . . . . . . . . . . . 3 1.3 Spectral Precoding Technique . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Sidelobe Suppression Techniques 9 2.1 Pulse Shaping and Frontend Filtering. . . . . . . . . . . . . . . . . . . . . . 9 2.2 Subcarrier Weighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3 Spectral Precoding Technique . . . . . . . . . . . . . . . . . . . . . . . . . 11 3 Improved SP-OFDM Technique 15 3.1 SignalModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.2 Fast Sidelobe Decaying Constraints andCodes . . . . . . . . . . . . . . . . 16 3.3 Performance Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4 Improved Adaptive SP-OFDM Technique 32 4.1 SignalModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.2 The Adaptation Schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 4.3 Performance Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 5 SP-OFDMA Technique 41 5.1 SignalModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 5.2 FastSidelobeDecayingConstraint andCodes . . . . . . . . . . . . . . . . . 44 5.3 Performance Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 6 Improved SP-CE-OFDM Technique 56 6.1 SignalModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 6.2 FastSidelobesDecayingConstraints andCodes . . . . . . . . . . . . . . . . 60 6.3 Performance Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 7 Conclusion 71 Appendix 73 Bibliography 77 | |
dc.language.iso | en | |
dc.title | 關於頻譜預編碼正交分頻多工及其多重存取與常數封幅正交分頻多工 | zh_TW |
dc.title | On Spectrally Precoded OFDM, OFDMA and Constant-envelope OFDM | en |
dc.type | Thesis | |
dc.date.schoolyear | 99-2 | |
dc.description.degree | 博士 | |
dc.contributor.oralexamcommittee | 林茂昭,林嘉慶,馮世邁,蘇育德,蘇賜麟,趙啟超 | |
dc.subject.keyword | 正交分頻多工,多重存取,頻譜預編碼,漸進式頻譜變化,循環字首,保護區間率,旁葉削減,可適性調變,平均頻譜效率,常數封幅, | zh_TW |
dc.subject.keyword | Orthogonal frequency-division multiplexing,multiple access,spectral precoding,asymptotic spectral behavior,cyclic prefix,guard ratio,sidelobe suppression,adaptive modulation,average spectral efficiency,constant-envelope, | en |
dc.relation.page | 85 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2011-03-31 | |
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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