The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2008
Filed:
Nov. 15, 2002
Donato Ettorre, Turin, IT;
Maurizio Graziano, Turin, IT;
Bruno Melis, Turin, IT;
Andrea Finotello, Turin, IT;
Alfredo Ruscitto, Turin, IT;
Donato Ettorre, Turin, IT;
Maurizio Graziano, Turin, IT;
Bruno Melis, Turin, IT;
Andrea Finotello, Turin, IT;
Alfredo Ruscitto, Turin, IT;
Telecom Italia S.p.A., Milan, IT;
STMicroelectronics S.R.L., Agrate Brianza, IT;
Abstract
A method for the synchronization of a digital telecommunication receiver comprises the steps of:—storing a plurality of consecutive samples E−1, E, M, L, L+1 of an incoming spread spectrum signal in a delay line 56;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a first digitally controlled interpolator, an interpolated early sample (e) anticipating an optimal sampling time instant;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a second digitally controlled interpolator, an interpolated middle sample (m) corresponding to the optimal sampling time instant;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a third digitally controlled interpolator, an interpolated late sample (l) delayed with respect to the optimal sampling time instant;—calculating an error signal ξ as the difference between the energy of the symbols computed from the interpolated early sample (e) and the interpolated late (l) sample;—extracting the sign of the error signal ξ—accumulating the sign of the error signal ξ for the generation of control signals S, S, Sfor controlling the interpolation phases of the digitally controlled interpolators used for determining the interpolated early (e), middle (m) and late (l) samples. The accumulated value has a positive saturation value of +4 and a negative saturation value of 4.