Apparatus for correcting phase error of VSB signal

Details Apparatus for correcting phase error of VSB signal Apparatus for correcting phase error of VSB signal

1995-11-13

1998-05-26

Chin, Stephen

Pulse or digital communications

Receivers

Amplitude modulation

375349, 348607, 329357, 455204, 455304, H03D 124, H04B 110

Patent

active

057578613

ABSTRACT:
An error detecting and correcting apparatus incorporated in a trellis decoder to compensate effects of 180.degree. phase errors of a transmitted N-level VSB (Vestigial Sideband) signal in a GA (Grand Alliance) HDTV (High Definition Television) receiver, the transmitted signal including a transmitted reference signal and a transmitted data signal, the decoder including an error detector for comparing a predetermined reference signal with the transmitted reference signal to provide an error signal denoting the presence or absence a 180.degree. phase error, a phase corrector for inverting the sign of the transmitted data signal to provide an inverted transmitted data signal, a switch for selectively providing the transmitted data signal or the inverted transmitted data signal in response to the error signal, and a trellis decoder for decoding the transmitted data signal or the inverted data signal provided by the switch.

REFERENCES:
patent: 5546132 (1996-08-01), Kim et al.
patent: 5602601 (1997-02-01), Kim et al.

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