Detection Probability Estimation of Directional Antennas and Omni-Directional Antennas |
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Authors: | Xiaofeng Lu Fletcher D Wicker Don Towsley Zhang Xiong Pietro Lio’ |
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Affiliation: | (1) Government Communications Systems Division, Harris Corporation, P.O. Box 37, Melbourne, FL 32902, USA; |
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Abstract: | This paper studies the problem of detection of directional antennas and omni-directional antennas by hostile detection systems.
We present a model for calculating the probability of detecting a transmitter at arbitrary location around the transmitter.
Our study shows that, if a directional antenna employs the same transmit power as an omni-directional antenna, the directional
antenna can not decrease the probability of being detected. In some scenarios, a directional antenna is more likely to be
detected than an omni-directional antenna. However, if a directional antenna provides the same Effective Isotropic Radiated
Power in the direction of the receiver as an omni-directional antenna, the transmit power needed by a directional antenna
to send data is much less than that of an omni-directional antenna. In this scenario, the probability of detecting a directional
antenna is reduced by over 90%. This reveals that directional antennas can be used to build a secure path to send data at
low probability of being detected by adversaries. |
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