瑞雷衰減通道中基於分散決策的頻譜偵測

Performance Analysis of Spectrum Sensing based on Distributed Detection over Rayleigh Fading Channels

林育揚(Yu-Yang Lin)

指導教授 ： 趙燿庚

元智大學/電機通訊學院/通訊工程學系/碩士(2011年)

https://doi.org/10.6838/YZU.2011.00084

摘要

論文提出一種於瑞雷衰減通道(Rayleigh Fading Channel)下，採取分散決策的感知無線電 (Cognitive Radio Network)的模擬信號頻譜偵測模型架構。本文透過開關鍵控(On-off Keying)訊號模擬信號接收偵測的情況，並且在感測器端使用了一種同調振幅解調的偵測技術，聯合接收中心端採取多數決策合成的決策方案來統合信號。最後與傳統的分集合成技術：選擇性合成(Selection Combining)做為比較，證明在偵測信號震幅並且限制誤警機率(Probability of False-alarm)為一定數的狀況下，本文所提出的分散決策可以提供比選擇性合成更好的遺漏機率效能。

關鍵字

分集合成 ； 感知無線電 ； 頻譜偵測

並列摘要

In this thesis, a signal spectrum sensing scheme for Cognitive Radio Network based on distributed detection over Rayleigh fading channel is provided. On-off keying signal modulation is simulated to signal detection behavior, a sensing technique which is called Coherent Amplitude Detection is used in sensor node, and Majority-Voting Combining is proposed for fusion center in this thesis. Finally, it is showed that the Miss-Detection probability for Majority-Voting Combining based on distributed detection is better than Selection Combining if the False-Alarm probability is limited to a constant.

並列關鍵字

Diversity ； Cognitive Radio ； Spectrum Sensing

參考文獻

[1] Z. Quan, S. Cui and A. H. Sayed, ”Optimal Linear Cooperation for Spectrum

in Cognitive Radio Networks”, IEEE J. Sel. Topics Signal Process., vol. 2, no. 1, pp. 28-40, Feb, 2008.

Spectrum Sensing with Energy Detection in Cognitive Radio Networks”, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS” vol. 8, no. 12, pp .5761-5766, Dec,2009.

[4] D. G. Brennan “Linear diversity combining techniques,” Proc. IRE,

[5] M. K. Simon, M.-S. Alouini, Digital Communication Over Fading Channels, 2nd ed John Wiley & Sons, Inc., 2005.