超寬頻系統能夠在極短的時間內傳送大量的訊息，而且此系統有較好的時間解析能力，可以用來處理多重路徑的問題。一般是使用耙式接收機來接收訊號能量，但由於耙式接收機需要較複雜的硬體，而且必須要作通道估測，所以複雜度較高，因此傳輸參考系統被提出。
傳輸參考系統不需要作通道估測，而且提供了低複雜度的接收機架構，但是需浪費50%的能量/頻寬去傳送參考訊號，而且其模板訊號(template signal)受到雜訊干擾，將會衍生雜訊乘雜訊項。因此本論文針對了這些缺點作了改善，並據以發展出性能更佳之數種新系統。
本論文共提出了幾個新的系統，分別是：(1) 能夠將內部脈衝干擾完全消除之BTR+A2TR系統；(2) 將所傳送的三個資料位元都作平均，以降低雜訊的DsATR系統；(3) 可一次傳送N個資料位元的NDTR系統；(4) 兼具增加傳送資料位元數與降低雜訊的ANDTR系統；(5) 除了擁有ANDTR系統的好處，還兼具消除部份內部脈衝干擾的ANDTR+BTR系統；(6) 具ANDTR+BTR系統的好處，但是可以完全消除內部脈衝干擾的A2NDTR+BTR系統。
以上都是單一用戶傳送與接收，本論文還提出多用戶ATR、BTR+ATR和BTR+A2TR系統的模擬，並且對這些系統作了比較。

Ultra-Wideband (UWB) impulse radio signals apply very short duration and are able to resolve multipath due to their fine time-resolution capability. To take full advantage of the available signal energy, a Rake receiver with high hardware complexity is required. To remedy this difficulty, an improved scheme called the transmitted reference (TR) systems has been proposed in literature.
TR systems do not require the complex task of channel estimation, thus their receiver structures are greatly simplified. However, the low-complexity on the detection of TR systems is achieved with the cost of 50% energy/bandwidth to transmit the reference signal. Moreover, the reference template in the TR systems also produces an additional noise-time-noise term. How to reduce such disadvantage of UWB TR systems has attracted much research effort nowadays.
We propose several improved TR systems in this thesis, such as: (1) The BTR+A2TR system, which cancels out all of the inter-pulse interference(IPI); (2) The Doublet-shifted Averaged Transmitted-Reference (DsATR) system, which contains three data bits in each frame and average the received signal in the receiver to decrease noise; (3) the N-bit Differential Transmitted-Reference (NDTR) system, which contains N-bit data in each frame of the transmitted signal; (4) The Averaged N-bit Differential Transmitted-Reference (ANDTR), which combines the high data rate and a low noisy template; (5) The ANDTR+BTR system, which not only contains all the advantages of the ANDTR system, but also adds the ability to cancel out some of the IPI; (6) The A2NDTR+BTR system, which is able to cancel all of the IPI.
The systems mentioned above are designed for a single user. The multiple access performance of ATR、BTR+ATR and BTR+A2TR systems are simulated and compared in this paper.

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