Design of variable loop gains of dual-loop DPLL

Author

Chun, Byungjin ; Lee, Yong Hoon ; Kim, Beomsup

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

45

Issue

12

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

1520

Lastpage

1522

Abstract

An approach to the derivation of variable loop gain sequences of dual-loop digital phase-locked loop (DPLL) is developed based on some modifications of the Kalman filtering formulation. It is shown that optimal loop gain sequences which are independent of measurement noise statistics can be obtained under a deterministic source model. Computer simulation results demonstrate that the adaptive dual-loop DPLL designed by using the proposed method is more robust to noise variations than the adaptive DPLL of Driessen (see ibid., vol.47, p.673-75, 1994)

Keywords

adaptive Kalman filters; digital phase locked loops; filtering theory; Kalman filtering; adaptive dual-loop DPLL; computer simulation results; deterministic source model; digital phase-locked loop; measurement noise statistics; noise variations; optimal loop gain sequences; variable loop gain sequences; Computer simulation; Digital filters; Filtering; Gain measurement; Kalman filters; Noise measurement; Phase locked loops; Statistics; Timing; Transmitters;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.650226

Filename

650226