DocumentCode
760593
Title
A Second-Order Frequency-Aided Digital Phase-Locked Loop for Doppler Rate Tracking
Author
Chie, C.M.
Author_Institution
LinCom Corp., Pasedena, CA, USA
Volume
28
Issue
8
fYear
1980
fDate
8/1/1980 12:00:00 AM
Firstpage
1431
Lastpage
1436
Abstract
A second-order digital phase-locked loop (DPLL) has a finite lock range which is a function of the frequency of the incoming signal to be tracked. For this reason, it is not capable of tracking an input with Doppler rate for an indefinite period of time. In this correspondence, an analytical expression for the hold-in time is derived. In addition, an all-digital scheme to alleviate this problem is proposed based on the information obtained from estimating the input signal frequency.
Keywords
PLLs; Phase-locked loop (PLL); Clocks; Costs; Digital integrated circuits; Frequency estimation; Frequency locked loops; Integrated circuit reliability; Large scale integration; Phase locked loops; Tracking loops; Very large scale integration;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1980.1094787
Filename
1094787
Link To Document