應用耙式接收器之多用戶直序式超寬頻通訊系統之效能分析

Performance Analysis of a Multi-User DS-UWB System under Multipath Effects with Rake Reception

柳佳林(Charlene Ann Liu)

指導教授 ： 譚旦旭

國立臺北科技大學/電資學院/電機工程系研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00503

摘要

本論文利用耙式接收器在多重路徑環境下來分析多用戶直序式分碼多工超寬頻通訊系統之錯誤率效能，並以高斯近似為基礎推導出理論的錯誤率函式。我們在四種UWB通道環境下針對不同用戶數進行模擬，實驗結果顯示當用戶數達24人時，模擬值與理論函式十分吻合，因此驗證所推導函式於預測DS-UWB系統錯誤率效能之有效性。

關鍵字

多重路徑通道 ； 多用戶直序式分碼多工超寬頻通訊 ； 耙式接收器 ； 高斯近似

並列摘要

This study theoretically analyzes the performance of multi-user DS-UWB system under multipath environments with the use of rake receivers. An accurate BER expression is derived based on Gaussian approximation. A series of simulations is conducted over various UWB channels with varying numbers of users. Experimental results reveal good agreements between simulations and derived BERs are achieved when the number of users is twenty-four; which verify the effectiveness of the derived result for predicting DS-UWB system performance.

並列關鍵字

Multipath Channel ； Multi-User Direct Sequence Ultra-Wideband (DS-UWB) ； RAKE Receiver ； Gaussian Approximation

參考文獻

[1] X. Shen, et al, Ultra-wideband Wireless Communications and Networks. John Wiley & Sons, Ltd,2006.

[5] M. Z. Win and R. A. Scholtz, “Ultra-wide Bandwidth Time-Hopping Spread-Spectrum Impulse Radio for Wireless Multiple-access Communications,” IEEE Transactions on Communications, 2000, pp. 679-691.

[6] A. Taha and K. M. Chugg, “A Theoretical Study on the Effects of Interference on UWB Multiple Access Impulse Radio,” in Proc. Asilomar Conf. Signals, Systems and Computers, 2002, pp. 728-732.

[7] N. Boubaker and K. B. Letaief, “Ultra Wide-band DSSS for Multiple Access Communications Using Antipodal Signaling,” in Proc. of IEEE International Conference on Communications, 2003, pp. 2197-2201.

[8] V. S. Somayazulu, “Multiple Access Performance in UWB Systems Using Time Hopping Versus Direct Sequence Spreading,” in Proc. IEEE International Conference on Wireless Communications and Networking Conference, 2002, pp. 522-525.