Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2005-04-05
2005-04-05
Ton, Dang (Department: 2666)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S208000, C370S210000, C370S238000, C375S260000, C375S354000
Reexamination Certificate
active
06876675
ABSTRACT:
Highly effective systems and methods for synchronizing OFDM receiver parameters to an OFDM transmitter are provided. These parameters may include carrier frequency, burst timing, and cyclic prefix length. These systems and methods incorporate special structural features into the OFDM signal to facilitate synchronization. In one embodiment, a supplemental cyclic prefix is added to an OFDM signal to facilitate synchronization. In an alternative embodiment, a synchronization burst with a periodic structure is used to facilitate synchronization. According to the present invention, synchronization may be maintained even if low cost analog oscillator components are used.
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Jones Vincent K.
Pollack Michael
Raleigh Gregory G.
Cisco Technology Inc.
Hom Shick
Lang Dan
Ritter, Lang & Kaplan
Rosenfeld Dov
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