Title :
Correlative tracking of pseudo-noise codes using a phase shifted reference
Author :
Kosbar, Kurt ; Gunawardana, Upul
Author_Institution :
Dept. of Electr. Eng., Missouri Univ., Rolla, MO, USA
fDate :
28 Nov- 2 Dec 1994
Abstract :
Investigates a first-order correlation loop for tracking pseudo-noise (PN) codes. The local reference is produced by a PN sequence generator in series with a Hilbert transform filter. The tracking performance of this non-linear loop is compared with conventional early-late delay-lock loops (ELDLL). Using a conservative definition of bandwidth, the new loop was found to be superior at moderate to low signal-to-noise ratios (SNR). Another advantage of the new structure is that it has a very large (arguably infinite) lock range
Keywords :
Hilbert transforms; correlation methods; digital filters; nonlinear filters; pseudonoise codes; synchronisation; tracking filters; Hilbert transform filter; PN sequence generator; bandwidth; correlative tracking; first-order correlation loop; lock range; nonlinear loop; phase shifted reference; pseudo-noise codes; signal-to-noise ratios; tracking performance; Bandwidth; Clocks; Delay effects; Delay estimation; Nonlinear filters; Phase locked loops; Signal generators; Tracking loops; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1820-X
DOI :
10.1109/GLOCOM.1994.512989
