Time of Arrival Estimation in Wireless Sensor Networks via OFDMA | IEEE Conference Publication | IEEE Xplore

Time of Arrival Estimation in Wireless Sensor Networks via OFDMA


Abstract:

This paper introduces the coarse time-of-arrival (ToA) estimation in wireless sensor networks (WSN) via orthogonal frequency division multiple access (OFDMA). In the prop...Show More

Abstract:

This paper introduces the coarse time-of-arrival (ToA) estimation in wireless sensor networks (WSN) via orthogonal frequency division multiple access (OFDMA). In the proposed technique, each sensor node exploits a set of orthogonal subcarrier as its allocated signature to respond of the ToA estimation requests transmitted by target nodes. The target node utilizes the orthogonality across sub-carriers to detect the transmitted signatures and their corresponding delays. This technique is energy efficient as it avoids multiple transmissions and receptions inherent in traditional neighbor discovery protocols and ToA estimation techniques in WSN. Moreover, in this technique, network initiation process does not require channel information or time synchronization across sensor nodes. ToA estimation error is calculated theoretically and via simulations. Moreover, the impact of available bandwidth on the performance of ToA estimation is investigated. Simulation results confirm the feasibility of the proposed method even at low signal to noise ratio (SNR) regimes and in multi- path and frequency selective (MPFS) channels.
Date of Conference: 06-09 September 2015
Date Added to IEEE Xplore: 28 January 2016
ISBN Information:
Conference Location: Boston, MA, USA

References

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