Digital broadcast transmission system of improved...

Pulse or digital communications – Transmitters

Reexamination Certificate

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Reexamination Certificate

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10887310

ABSTRACT:
A digital broadcast transmission system and a signal processing method thereof offers improved receptability. The digital broadcast transmission system includes an error correction encoding unit for encoding an input signal according to a predetermined error correction method; a synchronous signal inserting unit for inserting a synchronous signal in the input signal after the error correction encoding; a first pilot inserting unit for inserting a first pilot signal in the input signal which contains the synchronous signal therein; a second pilot inserting unit for inserting a plurality of second pilot signals in the input signal which contains the first pilot signal therein; a pulse shaping filter for pulse shaping the input signal with the first and the second pilot signals according to a predetermined roll-off factor; and a radio frequency (RF) unit for transmitting the pulse-shaped input signal to a transmission channel band. By inserting a plurality of pilot signals in the transmitted data, problems associated with disappearance of only pilot signal due to poor channel environment can be overcome.

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patent: 5574496 (1996-11-01), Nielsen et al.
patent: 7154915 (2006-12-01), Ushirokawa et al.
patent: 2002/0071053 (2002-06-01), Wittig
patent: 2006/0034378 (2006-02-01), Lindskog et al.
patent: 1999-0058954 (1999-07-01), None
patent: 1999-0082892 (1999-11-01), None
patent: 2000-0034435 (2000-06-01), None
patent: 2001-0055543 (2001-07-01), None
patent: 2001-0010456 (2002-02-01), None
patent: WO 92/09174 (1992-05-01), None
patent: WO 93/09622 (1993-05-01), None

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