Title :
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
fDate :
12/1/1997 12:00:00 AM
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;
Journal_Title :
Communications, IEEE Transactions on
