Title :
A second-order delay-locked loop of a spread spectrum receiver
Author_Institution :
Rockwell Int. Corp., Newport Beach, CA, USA
Abstract :
The tracking performance of 2nd-order delay-locked loops (DLL) with high gain for PN code chip synchronization is theoretically analyzed and evaluated by means of a Fokker-Planck equation. The results show that the steady state probability density function of normalized delay error of 2nd-order DLL with high gain is similar to that of a lst-order DLL; for the same mean-squared tracking jitter, the former has 10 log (1 + 1/4ξ2) (db) less signal-to-noise ratio than the latter. Also, some experimental results are presented. Though only DLL is analyzed, the analytical method is valid for other kinds of tracking loops
Keywords :
Fokker-Planck equation; delay circuits; jitter; military communication; pseudonoise codes; spread spectrum communication; synchronisation; Fokker-Planck equation; PN code chip synchronization; second-order delay-locked loop; spread spectrum receiver; steady state probability density function; tracking performance; Delay; Equations; Jitter; Performance analysis; Performance gain; Probability density function; Signal to noise ratio; Spread spectrum communication; Steady-state; Tracking loops;
Conference_Titel :
Military Communications Conference, 1993. MILCOM '93. Conference record. Communications on the Move., IEEE
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0953-7
DOI :
10.1109/MILCOM.1993.408707
