Radio interferometric geolocation
Proceedings of the 3rd international conference on Embedded networked sensor systems
StarDust: a flexible architecture for passive localization in wireless sensor networks
Proceedings of the 4th international conference on Embedded networked sensor systems
The Lighthouse Location System for Smart Dust
Proceedings of the 1st international conference on Mobile systems, applications and services
Radio interferometric tracking of mobile wireless nodes
Proceedings of the 5th international conference on Mobile systems, applications and services
MSP: multi-sequence positioning of wireless sensor nodes
Proceedings of the 5th international conference on Embedded networked sensor systems
Tracking mobile nodes using RF Doppler shifts
Proceedings of the 5th international conference on Embedded networked sensor systems
Passive Localization: Large Size Sensor Network Localization Based on Environmental Events
IPSN '08 Proceedings of the 7th international conference on Information processing in sensor networks
Spinning beacons for precise indoor localization
Proceedings of the 6th ACM conference on Embedded network sensor systems
Differential bearing estimation for RF tags
EURASIP Journal on Embedded Systems - Challenges on complexity and connectivity in embedded systems
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The paper introduces a novel technique for the bearing estimation of radio sources that can be used for the precise localization and/or tracking of RF tags such as wireless sensor nodes. It is well known that the bearing to a radio source can be estimated by an array of antennas typically arranged in a circular manner. The method is often referred to as Quasi-Doppler measurement. The disadvantage of the existing method is that the receiver is relatively large because of the multiple antennas (typically 8 or 16) and it is computationally intensive to process the high frequency radio signals. Thus, it cannot be done on small, inexpensive radio tags. Instead, we propose to use the array on the transmitter side utilizing as few as three antennas. We use a radio interferometric technique to transform the useful phase information from the high frequency radio signal to a low frequency signal (≪ 1 kHz) that can be processed on low-cost hardware. Utilizing three anchors nodes with small antenna arrays, any number of low cost wireless nodes with single antennas can be accurately localized.