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Subspace-Based Propagation Delay Estimation Robust to Frequency Offset for Two-Way Ranging

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3 Author(s)
Daegun Oh ; Hanyang University, Haengdangdong Seongdonggu, Seoul, Korea ; Myung-kyun Kwak ; Jong-Wha Chong

This letter proposes a subspace-based propagation delay estimation algorithm immune to sampling frequency offset and carrier frequency offset. The proposed algorithm is able to achieve a highly accurate propagation delay estimation by combining subspace-based fractional delay estimation with a symmetric double sided two-way ranging protocol. Not only Cramer-Rao lower bound (CRLB) was derived but also the performance of the proposed algorithm was analyzed and verified through Monte-Carlo simulations in additive white Gaussian noise (AWGN) and a two-path channel.

Published in:

IEEE Communications Letters  (Volume:16 ,  Issue: 2 )