Optimal design of a noncoherent second-order delay-locked loop using the exit-time criterion

Author

Bernhard, U.P. ; Welti, A.L.

Author_Institution

Swiss Federal Inst. of Technol., Zurich, Switzerland

Volume

2

fYear

1993

fDate

23-26 May 1993

Firstpage

799

Abstract

An approximation based on the singular perturbation method for the mean time to lose lock (MTLL) of a noncoherent second-order delay-locked loop (DLL) is derived. Such a loop is essential in direct-sequence spread-spectrum systems. The influence of loop offset due to a constant acceleration (Doppler rate) between the transmitter and receiver, as well as the optimal choice of the loop parameters due to the synchronization error, is studied

Keywords

Doppler effect; Doppler shift; delay circuits; pseudonoise codes; singularly perturbed systems; spread spectrum communication; synchronisation; Doppler rate; direct-sequence spread-spectrum systems; exit-time criterion; loop offset; mean time to lose lock; noncoherent second-order delay-locked loop; optimal design; singular perturbation method; synchronization error; AWGN; Acceleration; Additive white noise; Communications technology; Delay effects; Delay estimation; Gaussian noise; Perturbation methods; Spread spectrum communication; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1993. ICC '93 Geneva. Technical Program, Conference Record, IEEE International Conference on

Conference_Location

Geneva

Print_ISBN

0-7803-0950-2

Type

conf

DOI

10.1109/ICC.1993.397383

Filename

397383