You, S.Pak, J.Ahn, C.Shi, P.Lim, M.2017-08-162017-08-162016IEEE Transactions on Circuits and Systems - II - Express Briefs, 2016; 63(8):798-8021549-77471558-3791http://hdl.handle.net/2440/106931Date of publication February 18, 2016; date of current version July 28, 2016Digital phase-locked loops (DPLLs) have been commonly used to estimate phase information. However, they exhibit poor performance or, occasionally, a divergence phenomenon, if noise information is incorrect or if there are quantization effects. To overcome the weaknesses of existing DPLLs, we propose a new DPLL with a finite-memory structure called the unbiased finite-memory DPLL (UFMDPLL). The UFMDPLL is independent of noise covariance information, and it shows intrinsic robustness properties against incorrect noise information and quantization effects due to the finite-memory structure. Through numerical simulations, we show that the proposed DPLL is more robust against incorrect noise information and quantization effects than the conventional DPLLs are.en© 2016 IEEE.Digital phase-locked loop (DPLL); finite-memory structure; unbiasednessJournal article003005466710.1109/TCSII.2016.25311380003814400000182-s2.0-84984870587263951Shi, P. [0000-0001-6295-0405] [0000-0001-8218-586X] [0000-0002-0864-552X] [0000-0002-1358-2367] [0000-0002-5312-5435]