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Is there a way to intercept a Bluetooth signal? 

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In order to cope up with this interference source, this paper proposes a sophisticated interference aware Bluetooth segmentation algorithm (IBLUES), where Bluetooth packet types are selected depending on the packet success probability, which is calculated based on the interference generated by multiple piconets.
We propose mitigating interference between Bluetooth and IEEE 802.11 by employing a hybrid approach of adaptive frequency hopping (AFH) and Bluetooth carrier sense (BCS) of the channels.
We propose mitigating interference between Bluetooth and IEEE 802.11, by employing a hybrid approach of adaptive frequency hopping (AFH) and Bluetooth carrier sense (BCS) of the channels.
To ensure accuracy of estimation, adopting Bluetooth Low Energy (LE) beacon devices as signal sources is a reasonable solution.
Due to the relatively long interval between the available consecutive Bluetooth signal strength measurements, we propose a method of information filtering with speed detection, which combines the estimation information from the received signal strength (RSS) measurements with the prior information from the motion model.
We experimented the attenuation of Bluetooth signals by human body and concluded that Bluetooth can be used for a motion detector.
Due to the relatively long interval between the available consecutive Bluetooth signal strength measurements, the authors propose a method of information filtering with speed detection, which combines the estimation information from the RSSI measurements with the prior information from the motion model.
The analytical model presented is a general approach well suited for evaluating mutual interference for applications using Bluetooth for data communications.
We conclude that Bluetooth tracking is a viable approach, but that certain technological and practical aspects need to be considered when applying Bluetooth tracking in new cases.
In this paper, a novel routing protocol (LARP) for the Bluetooth scatternet is proposed, which reduces the hop counts between the source and the destination and reconstructs the routes dynamically using the location information of the Bluetooth devices.

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