New DSP type phase synchronizer with the method of least squares

Author

Hagiwara, Masafumi ; Nakagawa, Masao

Author_Institution

Fac. of Sci. & Technol., Keio Univ., Yokohama, Japan

fYear

1988

fDate

11-14 Apr 1988

Firstpage

1882

Abstract

A digital signal processing (DSP)-type phase synchronizer based on the method of least squares (PS-MLS) is proposed that can replace the conventional circuits for phase synchronizers, such as phase-locked loops (PLLs). The construction of PS-MLS is different from that of PLLs. The proposed PS-MLS has advantageous characteristics compared with the conventional DSP-type PLLs and can satisfy three important points of PLLs simultaneously: fast acquisition, wide pull-in range, and good noise suppression. Only two steps are required for the acquisition (in a noise-less case), the condition to accomplish synchronization is relaxed, and is equal to the sampling theorem (fi⩾2fs ), and the noise suppression performance is greatly improved compared with the conventional PLL

Keywords

least squares approximations; phase-locked loops; signal processing; synchronisation; DSP phase synchroniser; PLLs; fast acquisition; least squares method; noise suppression; phase-locked loops; sampling theorem; wide pull-in range; Communication systems; Detectors; Digital signal processing; Filters; Least squares methods; Multilevel systems; Phase detection; Phase locked loops; Sampling methods; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on

Conference_Location

New York, NY

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1988.196992

Filename

196992