研究生: |
王若耘 Jo-Yun Wang |
---|---|
論文名稱: |
改善通道對射頻指紋辨識率影響之研究 Research on Mitigating Channel Effects to RF Fingerprint Identification Rate |
指導教授: |
劉馨勤
Hsin-Chin Liu |
口試委員: |
林俊霖
Chun-Lin Lin 張立中 Li-Chung Chang 黃紹華 Shao-Hua Huang |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電機工程系 Department of Electrical Engineering |
論文出版年: | 2021 |
畢業學年度: | 109 |
語文別: | 中文 |
論文頁數: | 49 |
中文關鍵詞: | 射頻指紋辨識 、通道影響 、通道估測 、特徵提取 |
外文關鍵詞: | RF fingerprinting, Channel effect, Channel estimation, Feature extraction |
相關次數: | 點閱:264 下載:0 |
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射頻指紋辨識(RF fingerprinting)是透過學習傳送端的硬體指紋特徵來辨識設備,而這些特徵可以從接收訊號中分析並提取,但訊號在傳播途中會受到無線通道所造成的衰減、延遲影響,進而使得特徵受到干擾並導致辨識率下降。
本文使用15張網卡進行IEEE 802 .11g訊號收發實驗,共接收了12000筆封包。利用實驗所得資料並且透過模擬萊斯衰落通道(Rician fading channel)來分析通道對射頻指紋辨識之影響。本論文估算通道頻率響應,並提出了減少通道影響因素之射頻指紋特徵提取方法。亦在研究結果中比較了訓練、辨識相同通道以及不同通道之辨識率,透過本文提出的方法,在訓練、辨識不同通道下之辨識率平均可提升約27.6%。
Radio frequency fingerprint that is analyzed and extracted from the received signal can be used to identify the device by learning the hardware fingerprint features of the transmitter. Yet the received signal can be affected by the attenuation and delay caused by the wireless channel during the propagation, which results in the RF fingerprint feature disturbances and identification rate degradation.
In this thesis, 15 wireless local area network adapters are used for IEEE 802.11g signal transmission and reception experiments, in which 12,000 packets are received in total. By passing these experimental data through simulated Rician fading channels, the impact of the channel to the radio frequency fingerprint identification is analyzed.
In this work, we estimate the channel frequency response and propose a method for extracting radio frequency fingerprint features with less channel effect. The simulation results compare identification rates of using training and classification data of the same channel and that of different channels. Applying the proposed method, the identification rates with channel variation increases about 27.6% in average.
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