VSB receiver and carrier recovery apparatus thereof

Details VSB receiver and carrier recovery apparatus thereof VSB receiver and carrier recovery apparatus thereof

2009-06-04

2011-10-04

Tse, Young T. (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S344000

Reexamination Certificate

active

08031813

ABSTRACT:
There are provided a VSB receiver and a carrier recovery apparatus thereof, in which a carrier is recovered using a VSB modulated signal. In the VSB receiver, a digital processing part selects a desired channel frequency through an antenna, converts the channel frequency into an intermediate frequency, and digitalizes the channel frequency by passing a predetermined band of the intermediate frequency. A carrier recovery part extracts pilot signals by using a first LPF having a first bandwidth and a second LPF having a second bandwidth, and recovers a baseband carrier wave signal from a passband signal by using one of the extracted pilot signals. A clock demodulation part removes the pilot signal from the baseband carrier wave signal and extracts a synchronizing signal. A noise removing part removes a linear noise and a residual phase jitter of the baseband signal by using the synchronizing signal. A decoding part decodes the baseband signal whose noise is removed. Accordingly, the carrier recovery can be stably performed even when the pilot signal is weak.

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