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Robust self-cancellation-based time-of-arrival estimation algorithm to carrier frequency offset for bi-directional chirp signals

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4 Author(s)
Daegun Oh ; Adv. Radar Technol. Lab., Daegu Geongbuk Inst. of Sci. & Technol., Daegu, South Korea ; Sangdeok Kim ; Jong-wha Chong ; Jong-Hun Lee

This study presents a robust self-cancellation-based time-of-arrival (TOA) estimation algorithm against carrier frequency offset (CFO). The proposed algorithm is developed to exploit the up and down chirp of bi-directional chirp signals. Using the relationship between the phase shifts of the transformed signals of the up and down chirp symbols, the CFO-induced error of the TOA estimates can be cancelled without pre-estimation and compensation through the proposed method. The root mean squared error of the proposed algorithm is analysed and verified through simulations in an additive white Gaussian noise and multi-path channel in the presence of CFO.

Published in:

Communications, IET  (Volume:8 ,  Issue: 12 )