发明申请
- 专利标题: VSB receiver and carrier recovery apparatus thereof
- 专利标题(中): VSB接收机和载波恢复装置
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申请号: US11002874申请日: 2004-12-01
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公开(公告)号: US20050141645A1公开(公告)日: 2005-06-30
- 发明人: Joon Kim , Tok Kim
- 申请人: Joon Kim , Tok Kim
- 专利权人: LG Electronics Inc.
- 当前专利权人: LG Electronics Inc.
- 优先权: KR10-2003-0086336 20031201; KR10-2003-0094592 20031222
- 主分类号: H03D1/24
- IPC分类号: H03D1/24 ; H04L1/00 ; H04L27/00 ; H04L27/06 ; H04L27/22 ; H04N5/38 ; H04N5/44 ; H04N5/455
摘要:
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.
公开/授权文献
- US07558340B2 VSB receiver and carrier recovery apparatus thereof 公开/授权日:2009-07-07
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