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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55277
標題: | 梳狀頻譜分碼多重存取之頻率旁波特性 Spectral Sidelobe Properties in CS-CDMA System |
作者: | Ting-Heng Chou 鄒定衡 |
指導教授: | 鐘嘉德 |
關鍵字: | 梳狀頻譜分碼多重存取信號,旁波壓抑,華須哈德瑪,零插入,正交互譜格雷,傅立葉轉換碼,唧聲, CS-CDMA,sidelobe suppression,Walsh-Hadamard code,zero insertion,orthogonal complementary Golay code,DFT code,chirp-like code, |
出版年 : | 2014 |
學位: | 碩士 |
摘要: | In this thesis, general constraints on the employed spreading code are developed for comb spectrum code-division multiple access (CS-CDMA) systems to warrant the desirable spectral property that the power spectral sidelobes decay asymptotically as f-2Q-2, where Q is a preassigned positive integer. Precisely, f-4 and f-6-decaying codewords are designed to provide small sidelobes decaying and thus mitigate adjacent channel interference. It is shown that the sidelobe decaying characteristic of the CS-CDMA signal can be properly described by the code index of the underlined zero-insertion Walsh-Hadamard codeword. Finally, unequal magnitude spectral sidelobe decaying codewords are also devised to achieve the desirable spectral property of the fast sidelobe decaying. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55277 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
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