Patent · US Expired

Circuit and method for deriving the word timing of a pulse position modulated signal

US4866738A · kind A · utility

10Cited by

7References

12Claims

0Family size

Assignee

Ant Nachrichtentechnik GmbH · DE

Inventors

Theo Wiesmann · Backnang, DE
Wolfgang Steinert · Backnang, DE
Jürgen Müller · Bayreuth, DE

Key dates

Filing date	Aug 31, 1988
Grant date	Sep 12, 1989
Priority date	—
Expiry date	Aug 31, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH04L7/0066
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method of deriving the word timing or word boundaries of a PPM signal, without requiring a synchronizing marker to be added to the PPM signal, employs a bipolar evaluation signal which begins at any time slot of the PPM signal. The evaluation signal is multiplied repeatedly with successive portions of the PPM signal within a time frame of the PPM signal which extends over a plurality of word lengths, and the product signals are integrated. Such repeated multiplications with subsequent integration are performed a number of times, with the evaluation signal being offset by one time slot each time. The time position of the evaluation signal which, after repeated multiplication and integration, produces the smallest possible signal, is considered to be in phase synchronism with the word timing of the PPM signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.