Symbol synchronization using phase discontinuity for DVB-T...

Details Symbol synchronization using phase discontinuity for DVB-T... Symbol synchronization using phase discontinuity for DVB-T...

2011-01-11

2011-01-11

Kim, Kevin Y (Department: 2611)

Pulse or digital communications

Synchronizers

C375S260000

Reexamination Certificate

active

07869551

ABSTRACT:
At a receiver incoming coded OFDM Symbol Data are passed through a Coarse Symbol Timing Synchronization module to determine the approximate start of the symbol. In one embodiment this is accomplished through correlation. The symbol is then passed through an FFT (2K or 8K, depending on the mode desired by the receiver). Since the Coarse Symbol Timing Synchronization module only determines an approximate start point of the symbol, a process of fine synchronization is used to adjust this approximate start point and determine a more accurate start point of the symbol. In this manner, the receiver is enabled to process COFDM symbols in DVB-T transmissions (where the symbols include a cyclic prefix to overcome echoes). One output of an FFT operation is magnitude. Magnitude is used for Channel Estimation (or Channel Correction). Another output of an FFT operation is phase discontinuity or rotations. Phase discontinuities are used in a fine synchronization process to determine the number of phase discontinuities. Phase discontinuity data of the symbol is passed through an N-Point FFT.

REFERENCES:
patent: 5471464 (1995-11-01), Ikeda
patent: 6058121 (2000-05-01), Kim et al.
patent: 6487252 (2002-11-01), Kleider et al.
patent: 6853616 (2005-02-01), Kim et al.
patent: 7076002 (2006-07-01), Ramirez-Mireles et al.
patent: 7710858 (2010-05-01), Cohen
patent: 2004/0246889 (2004-12-01), Ogawa et al.
patent: 1 178 642 (2006-02-01), None
International Search Report dated Apr. 25, 2008 in PCT Application No. PCT/US2007/081833.
Examination Report dated Apr. 25, 2008 in PCT Application No. PCT/US2007/081833.

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