Method and apparatus for aligning communication signals

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels

Reexamination Certificate

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C375S259000, C375S354000

Reexamination Certificate

active

07660331

ABSTRACT:
A pilot signal is prepended to a communication signal to form a test signal. The test signal is transmitted through a communication network and received from the communication network. A temporal marker in the pilot signal portion of the received test signal is identified. The communication signal portion of the received test signal is known to begin at a specified time following the temporal marker. Using the identified temporal marker and the specified time, a beginning of the communication signal portion is identified within the received test signal. The identified beginning of the communication signal portion in the received test signal is then aligned with a beginning of an undegraded version of the communication signal.

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patent: 6356555 (2002-03-01), Rakib et al.
patent: 7584402 (2009-09-01), Lapstun et al.
patent: 2001/0033611 (2001-10-01), Grimwood et al.
patent: 2001/0046266 (2001-11-01), Rakib et al.
patent: 2003/0156603 (2003-08-01), Rakib et al.
patent: 2006/0040616 (2006-02-01), Wheatley

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