尋求能符合FCC頻譜的限制的各種脈衝波形(特別是針對UWB室內系統)，使其達到能免於干擾現有的通訊系統，並能更有效的利用珍貴的頻譜資源，也就是能提升頻率利用效率。
理論分析在AWGN通道下，DS-UWB多用戶系統在良好的時序同步下對應於用戶1訊號的相關接收機的平均錯誤率；且利用修正後的Saleh-Valenzuela通道來模擬室內多路徑通道，理論分析在室內環境中，大量的多路徑干擾下，DS-UWB多用戶系統在非同步及多用戶條件下使用RAKE接收機來解析平均位元錯誤率。
最後可尋求擁有最佳效能且符合FCC頻譜的限制的脈衝波形。

In order to mitigate the interferences between UWB systems and the existing systems, we will seek to search a variety of UWB pulse waveforms to meet Federal Communication Commission spectral mask(especially in UWB indoor environment) ,and make good use of rare spectral resources, i.e. improving spectral efficiency.
In AWGN channel and under good timing synchronization we analyze direct sequence ultra-wideband (DS-UWB) multiple access system in terms of the average bit error rate (BER) in accordance with user 1；on the other hand, in indoor environment we simulate the indoor multi-path fading channel by means of modified S-V channel model, and on asynchronous condition analyze the average BER of direct sequence ultra-wideband (DS-UWB) multiple access system by Rake receiver.
Finally, we must seek to find some UWB pulse waveforms having good BER performance and those also meet the “FCC Mask”.

摘要 i
誌謝 iii
目錄 iv
目錄 v
圖索引 vi
圖索引 vii
表索引 xiii
第一章 導論 1
1-1 UWB的歷史沿革 1
1-2 研究動機 2
1-3 論文架構 5
第二章 各種超寬頻脈衝整形波形 7
2-1 階微分高斯脈衝波形[3][4] 9
2-2 正交Hermite脈衝[6] 17
2-3 Laplacian 單脈衝[15] 26
2-4 Cubic單脈衝[15] 28
2-5 扁長球波函數(Prolate Spheroidal Wave Functions)[5] 30
2-6 小波函數[8] 33
第三章 DS-UWB在非同步多用戶系統的性能分析 35
3-1 模型與信號格式 35
3-2 利用高斯近似做多用戶干擾近似分析 48
3-3 利用隨機序列替代展頻碼來解條件 51
3-4 性能分析 56
第四章 DS-UWB在Saleh-Valenzuela通道下的性能分析 66
4-1 修正Saleh-Valenzuela通道模型 66
4-2 DS-UWB在Saleh-Valenzuela通道下的非同步系統分析 70
4-3 利用高斯近似做多路徑干擾與多重存取干擾近似分析 83
4-4 利用隨機序列替代展頻碼以及S-V通道特性來解條件 88
4-5 Log-Normal衰減的影響 96
4-6 性能分析 106
參考文獻 118

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