Time-of-arrival estimation algorithm for positioning in NB-IoT physical layer

Chao Yu Chen, I. Hsien Li

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


In this study, the authors propose a new time-of-arrival (ToA) algorithm for positioning in the physical layer of narrowband Internet-of-Things (NB-IoT) technology. This algorithm estimates the ToA of transmitted narrowband positioning reference signals (NPRSs) by detecting the first valid tap of estimated power delay profile (PDP). They estimate the PDP as well as the noise power in the time domain via inverse Fast Fourier transformation of received frequency-domain NPRSs. The accuracy of the estimated noise power is crucial in the ToA estimation since the SNR is extremely low in typical NB-IoT scenarios. The simulations show that the proposed ToA estimation method outperforms the conventional method and performs well in various scenarios.

Original languageEnglish
Pages (from-to)1821-1825
Number of pages5
JournalIET Communications
Issue number11
Publication statusPublished - 2020 Jul 14

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering


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