Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via frequency channels
Reexamination Certificate
2007-11-06
2007-11-06
Pham, Chi (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via frequency channels
C370S518000
Reexamination Certificate
active
10674922
ABSTRACT:
Method embodiments for achieving hyperframe symbol synchronization are disclosed, along with device and system embodiments for implementing such methods. In one embodiment, the method comprises: receiving a pilot signal having at least two phase states; measuring the pilot signal as a sequence of measured symbols; and determining an alignment offset upon detecting between adjacent measure symbols a phase difference greater than a predetermined threshold. The alignment offset determination may include: forming a data field of four measured symbols around the detected phase difference; searching for the position of a two-symbol window in the data field that maximizes a phase difference; and calculating the alignment offset from this position.
REFERENCES:
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patent: 6643340 (2003-11-01), Strait
patent: 6724849 (2004-04-01), Long et al.
patent: 6804267 (2004-10-01), Long et al.
Boakye Alexander O.
Brady W. James
Pham Chi
Shaw Steven A.
Telecky , Jr. Frederick J.
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