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US007876261B1

(12;

United States Patent

Adams

(io) Patent No.: (45) Date of Patent:

US 7,876,261 Bl Jan. 25, 2011

(54) REFLECTED WAVE CLOCK SYNCHRONIZATION

(75) Inventor: Gregory F. Adams, Morristown, NJ (US)

(73) Assignee: Lockheed Martin Corporation,

Bethesda, MD (US)

( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 39 days.

(21) Appl.No.: 12/259,573

(22) Filed: Oct. 28, 2008

(51) Int. CI.

G01S13/00 (2006.01)
G01S 7/40 (2006.01)
H04B 7/00 (2006.01)

(52) U.S. CI 342/88; 342/82; 342/165;

342/173; 342/174; 455/265

(58) Field of Classification Search 342/82 88,

342/165, 173, 174; 455/208, 265 See application file for complete search history.

(56) References Cited

U.S. PATENT DOCUMENTS

3,739,287 A * 6/1973 Johnson 327/10

3,798,650 A * 3/1974 McComasetal 375/356

3,942,124 A * 3/1976 Tarczy-Hornoch 327/154

4,096,448 A * 6/1978 Hayes 372/18

4,198,604 A * 4/1980 Holdaway 455/260

4,641,107 A 2/1987 Kalokitis

4,780,685 A 10/1988 Ferguson

4,835,480 A * 5/1989 Skupen et al 342/135

4,885,590 A 12/1989 Hasan

4,965,530 A 10/1990 Katz

4,968,968 A * 11/1990 Taylor 342/174

5,003,314 A * 3/1991 Berkowitz et al 342/372

5,017,927 A 5/1991 Agrawaletal.

5,103,233 A 4/1992 Gallagher et al.

5,151,702 A 9/1992 Urkowitz

5,157,403 A 10/1992 Urkowitz

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