Synchronization in OFDM systems
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United States of America Patent
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Apr 5, 2005
Grant Date -
N/A
app pub date -
Feb 5, 1999
filing date -
Feb 6, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
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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