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2. 发明申请

US20090245390A1 VSB RECEIVER AND CARRIER RECOVERY APPARATUS THEREOF 有权
标题翻译： VSB接收机和载波恢复装置
公开(公告)号：US20090245390A1
公开(公告)日：2009-10-01
申请号：US12478613
申请日：2009-06-04
申请人： Joon Tae KIM , Tok Kim
发明人： Joon Tae KIM , Tok Kim
IPC分类号： H04N7/12
CPC分类号： H04L27/066 , H03D1/24 , H04L1/004 , H04L2027/0028 , H04L2027/0057 , H04L2027/0067 , H04L2027/0069 , H04L2027/0087 , H04N5/38 , H04N5/4401 , 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.
摘要翻译：提供了一种VSB接收机及其载波恢复装置，其中使用VSB调制信号来恢复载波。在VSB接收机中，数字处理部通过天线选择期望的信道频率，将信道频率转换为中频，并通过中频的预定频带进行数字化。载波恢复部分通过使用具有第一带宽的第一LPF和具有第二带宽的第二LPF来提取导频信号，并且通过使用所提取的导频信号之一从通带信号中恢复基带载波信号。时钟解调部分从基带载波信号中去除导频信号并提取同步信号。噪声去除部通过使用同步信号去除基带信号的线性噪声和残留相位抖动。解码部分对噪声被去除的基带信号进行解码。因此，即使导频信号弱，也能够稳定地进行载波恢复。

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