Wi-Fi Devices Individual Identification based on Envelope Front Characteristic

Abstract

There are some characteristics are used for traditional Wi-Fi devices individual identification methods, such as: amplitude and phase characteristics during the period that Wi-Fi devices are turned-on or turned-off, MAC address, and IP address. In fact, on one hand, MAC address and IP address are easily to be changed. Traditional methods can’t identify individual Wi-Fi devices if MAC address or IP address changed. On the other hand, the amplitude and phase characteristics of Wi-Fi devices can only be identified during the short period of turned-on or turned-off. The traditional methods have application limitations. Therefore, the Wi-Fi devices individual identification based on envelope front characteristic is proposed in this paper. Firstly, envelopes of Wi-Fi signals are extracted. Secondly, front characteristics of Wi-Fi envelope are extracted. Then envelope front characteristics are used to compare and match with models saved in the library to realize Wi-Fi devices individual identification. By using the method proposed in this paper, Wi-Fi devices individual identification can be realized whether MAC address or IP address changed. Scope of identification application can be effectively expanded into the whole time when Wi-Fi devices transmit signals by using this method. Since envelope front characteristics have the advantages of non-changing and non-copying, accuracy of Wi-Fi individual identification is also improved by using this method.