RF-based DFAR and implicit ad-hoc usable security Stephan Sigg Aalto University, Communications and Networking July 1, 2016
Group DFAR Conclusion 2 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion 2 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion 2 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion 3 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion 3 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion 4 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion Project: RF-based device-free activity recognition 5 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion RF-based activity recognition Sensewaves Video 6 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion RF-based device-free activity recognition g n g Crawling n i i d k n a l t a S W empty L y i n g 7 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion RF-based device-free activity recognition g n g Crawling n i i d k n a l t a S W empty L y i n g 7 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion Features Assume that samples are taken on the signal strenth of an incoming signal for a window Mean difference between subsequent maxima Mean signal strength When the maximum peaks within a sample window are of similar magnitude, this indicates low The mean signal strength over a window of activity in an environment or static activities. The opposite might be found with dynamic activities measurements represents static characteristic changes in the received signal strength. It provides means to distinguish a standing person as well as her approximate location. Count of zero crossings Signal peaks within 10% of a maximum Variance of the signal's strength The count of zero crossings over a sample Reflections at nearby or remote objects impact The variance of the signal strength represents interval is a measure of the fluctuation in a the signal strength at a receive antenna. When the volatility of the received signal. received signal's strength. all peaks are of the similar magnitude, this is an indication that movement is farther away. It can provide some estimation on changes in It can be leveraged in order to estimate the a receiver's proximity such as movement of count of individuals or movement in proximity This feature can indicate near-far relations and individuals of a receiver. activity of individuals. 8 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion Features Mean Assume that samples are taken on the signal strenth of an incoming signal for a window Mean difference between subsequent maxima Mean signal strength When the maximum peaks within a sample window are of similar magnitude, this indicates low The mean signal strength over a window of activity in an environment or static activities. The opposite might be found with dynamic activities measurements represents static characteristic changes in the received signal strength. It provides means to distinguish a standing person as well as her approximate location. Count of zero crossings Signal peaks within 10% of a maximum Variance of the signal's strength The count of zero crossings over a sample Reflections at nearby or remote objects impact The variance of the signal strength represents interval is a measure of the fluctuation in a the signal strength at a receive antenna. When the volatility of the received signal. received signal's strength. all peaks are of the similar magnitude, this is an indication that movement is farther away. It can provide some estimation on changes in It can be leveraged in order to estimate the a receiver's proximity such as movement of count of individuals or movement in proximity This feature can indicate near-far relations and individuals of a receiver. activity of individuals. 8 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion Features Mean Assume that samples are taken on the signal strenth of an incoming signal for a window Di ff erence between maxima Mean difference between subsequent maxima Mean signal strength When the maximum peaks within a sample window are of similar magnitude, this indicates low The mean signal strength over a window of activity in an environment or static activities. The opposite might be found with dynamic activities measurements represents static characteristic changes in the received signal strength. It provides means to distinguish a standing person as well as her approximate location. Count of zero crossings Signal peaks within 10% of a maximum Variance of the signal's strength The count of zero crossings over a sample Reflections at nearby or remote objects impact The variance of the signal strength represents interval is a measure of the fluctuation in a the signal strength at a receive antenna. When the volatility of the received signal. received signal's strength. all peaks are of the similar magnitude, this is an indication that movement is farther away. It can provide some estimation on changes in It can be leveraged in order to estimate the a receiver's proximity such as movement of count of individuals or movement in proximity This feature can indicate near-far relations and individuals of a receiver. activity of individuals. 8 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion Features Mean Assume that samples are taken on the signal strenth of an incoming signal for a window Di ff erence between maxima Mean difference between subsequent maxima Mean signal strength When the maximum peaks within a sample window are of similar magnitude, this indicates low The mean signal strength over a window of activity in an environment or static activities. The opposite might be found with dynamic activities measurements represents static characteristic changes in the received signal strength. It provides means to distinguish a standing person as well as her approximate location. Variance Count of zero crossings Signal peaks within 10% of a maximum Variance of the signal's strength The count of zero crossings over a sample Reflections at nearby or remote objects impact The variance of the signal strength represents interval is a measure of the fluctuation in a the signal strength at a receive antenna. When the volatility of the received signal. received signal's strength. all peaks are of the similar magnitude, this is an indication that movement is farther away. It can provide some estimation on changes in It can be leveraged in order to estimate the a receiver's proximity such as movement of count of individuals or movement in proximity This feature can indicate near-far relations and individuals of a receiver. activity of individuals. 8 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
Group DFAR Conclusion Features Mean Assume that samples are taken on the signal strenth of an incoming signal for a window Di ff erence between maxima Mean difference between subsequent maxima Mean signal strength When the maximum peaks within a sample window are of similar magnitude, this indicates low The mean signal strength over a window of activity in an environment or static activities. The opposite might be found with dynamic activities measurements represents static characteristic changes in the received signal strength. It provides means to distinguish a standing person as well as her approximate location. Zero Variance Count of zero crossings Signal peaks within 10% of a maximum crossings Variance of the signal's strength The count of zero crossings over a sample Reflections at nearby or remote objects impact The variance of the signal strength represents interval is a measure of the fluctuation in a the signal strength at a receive antenna. When the volatility of the received signal. received signal's strength. all peaks are of the similar magnitude, this is an indication that movement is farther away. It can provide some estimation on changes in It can be leveraged in order to estimate the a receiver's proximity such as movement of count of individuals or movement in proximity This feature can indicate near-far relations and individuals of a receiver. activity of individuals. 8 / 22 Stephan Sigg RF-based DFAR and implicit ad-hoc usable security
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