(19)
(11)EP 2 799 943 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
26.11.2014 Bulletin 2014/48

(43)Date of publication A2:
05.11.2014 Bulletin 2014/45

(21)Application number: 14178731.7

(22)Date of filing:  08.12.2011
(51)Int. Cl.: 
G04G 7/00  (2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 15.12.2010 US 969314

(62)Application number of the earlier application in accordance with Art. 76 EPC:
11808026.6 / 2652565

(71)Applicant: RAYTHEON COMPANY
Waltham MA 02451-1449 (US)

(72)Inventors:
  • WILKINSON, Steven R.
    Stevenson Ranch, CA California 91381-1135 (US)
  • NELSON, Neil R.
    Anaheim, CA California 92804-3714 (US)

(74)Representative: Carpmaels & Ransford LLP 
One Southampton Row
London WC1B 5HA
London WC1B 5HA (GB)

  


(54)Synchronization of remote clocks


(57) A method and a clock distribution node arranged to synchronize one or more remote clocks with a local clock. The clock distribution node calculates a first time offset between the local clock and the remote clock from an interference pattern between a spatially aligned local pulse sequence from the local clock and remote pulse sequence from the remote clock; receives a second time offset from a remote node; and applies a time offset value based on a difference between the first and second time offsets to the remote clock to synchronize the remote to the local clock, wherein the remote node is arranged to calculate the second time offset based from an interference pattern between a spatially aligned local pulse sequence from the local clock and remote pulse sequence from the remote clock.