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公开(公告)号：US20050135508A1
公开(公告)日：2005-06-23
申请号：US11020986
申请日：2004-12-22
CPC分类号： H04N5/4401 , H04L27/06 , H04L2027/0028 , H04L2027/0057 , H04L2027/0065 , H04N5/455 , H04N21/4382
摘要： Provided is a carrier recovery apparatus in a vestigial sideband modulation (VSB) type digital television (DTV) receiver. The carrier recovery apparatus dynamically controls a sign determination level which is a reference for determining a sign of an I signal in a sign extractor. Therefore, the carrier recover apparatus can eliminate unnecessary sign extraction caused by zero-crossing which is generated when the receiver receives a pilot signal weaken by a channel ghost, and improves the frequency lock performance in the receiver. Specially, the carrier recover apparatus. can effectively improve the frequency lock performance when comparatively large pattern jitter is existed in a low pass signal caused by a ghost signal produces a long delay time.
摘要翻译： 提供了一种残留边带调制（VSB）型数字电视（DTV）接收机中的载波恢复装置。 载波恢复装置动态地控制作为用于确定符号提取器中的I信号的符号的参考的符号确定级别。 因此，载波恢复装置可以消除当接收机接收到由信道重影削弱的导频信号时产生的过零所引起的不必要的符号提取，并提高接收机中的频率锁定性能。 特别地，载体回收装置。 可以有效地提高在由幽灵信号引起的低通信号中存在较大的图案抖动时产生较长的延迟时间的锁频性能。
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公开(公告)号：US07463692B2
公开(公告)日：2008-12-09
申请号：US10927149
申请日：2004-08-27
申请人： Jung Sig Jun , Tok Kim
发明人： Jung Sig Jun , Tok Kim
IPC分类号： H04L5/12
CPC分类号： H04L27/066 , H04L7/027 , H04N5/4401 , H04N21/4382
摘要： A device and method for a symbol recovery in a digital television are disclosed. The device includes a symbol clock recovery device includes a remained phase error remover operating a digital baseband real/imaginary number component signals, and removing remained phase error, a timing error detector nonlinearly operating the real/imaginary number component signals having the remained phase error removed, and detecting symbol clock phase error information therefrom, and an oscillating part generating a symbol clock frequency compensated to at least two times from the detected symbol clock phase error information and outputting the compensated frequency.
摘要翻译： 公开了一种用于数字电视中的符号恢复的装置和方法。 该装置包括符号时钟恢复装置，其包括操作数字基带实数/虚数分量信号的剩余相位误差去除器，以及去除剩余相位误差;非线性地操作具有剩余相位误差的实数/虚数分量信号的定时误差检测器被去除 以及检测符号时钟相位误差信息，以及振荡部分，从所检测的符号时钟相位误差信息产生至少补偿了两倍的符号时钟频率，并输出补偿后的频率。
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公开(公告)号：US08031813B2
公开(公告)日：2011-10-04
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
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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公开(公告)号：US07558340B2
公开(公告)日：2009-07-07
申请号：US11002874
申请日：2004-12-01
申请人： Joon Tae Kim , Tok Kim
发明人： Joon Tae Kim , Tok Kim
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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公开(公告)号：US07480350B2
公开(公告)日：2009-01-20
申请号：US11020986
申请日：2004-12-22
申请人： Tok Kim , Sung Ryong Hong
发明人： Tok Kim , Sung Ryong Hong
CPC分类号： H04N5/4401 , H04L27/06 , H04L2027/0028 , H04L2027/0057 , H04L2027/0065 , H04N5/455 , H04N21/4382
摘要： Provided is a carrier recovery apparatus in a vestigial sideband modulation (VSB) type digital television (DTV) receiver. The carrier recovery apparatus dynamically controls a sign determination level which is a reference for determining a sign of an I signal in a sign extractor. Therefore, the carrier recover apparatus can eliminate unnecessary sign extraction caused by zero-crossing which is generated when the receiver receives a pilot signal weaken by a channel ghost, and improves the frequency lock performance in the receiver. Specially, the carrier recover apparatus can effectively improve the frequency lock performance when comparatively large pattern jitter is existed in a low pass signal caused by a ghost signal produces a long delay time.
摘要翻译： 提供了一种残留边带调制（VSB）型数字电视（DTV）接收机中的载波恢复装置。 载波恢复装置动态地控制作为用于确定符号提取器中的I信号的符号的参考的符号确定级别。 因此，载波恢复装置可以消除当接收机接收到由信道重影弱化的导频信号时产生的过零所引起的不必要的符号提取，并且提高了接收机中的频率锁定性能。 特别地，当由于重影信号引起的低通信号中存在相当大的模式抖动时，载波恢复装置可以有效地提高频率锁定性能，从而产生较长的延迟时间。
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公开(公告)号：US07072425B2
公开(公告)日：2006-07-04
申请号：US10773041
申请日：2004-02-04
申请人： Jung Sig Jun , Tok Kim
发明人： Jung Sig Jun , Tok Kim
IPC分类号： H04L27/22
CPC分类号： H04L27/066 , H04L7/0272 , H04L2027/0028 , H04L2027/0057
摘要： A digital TV receiver includes an A/D converter converting an analog signal into a digital signal, a carrier recovery converting the digital pass-band signal into a digital base-band signal, and a symbol clock recovery converting digital real/imaginary base-band component signals into OQAM type of real/imaginary component signals, detecting timing error information by performing high pass-band filtering on the OQAM real/imaginary signals, and squaring and adding the filtered value, and for generating and outputting at least two times the frequency of the symbol clock corrected from the detected timing error information.
摘要翻译： 数字电视接收机包括将模拟信号转换为数字信号的A / D转换器，将数字通带信号转换为数字基带信号的载波恢复，以及转换数字实/虚基带 分量信号转换为OQAM类型的实/虚分量信号，通过对OQAM实/虚信号执行高通带滤波，以及平方和相加滤波值，检测定时误差信息，并产生和输出至少两倍的频率 从所检测到的定时误差信息中校正的符号时钟。
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公开(公告)号：US20050141645A1
公开(公告)日：2005-06-30
申请号：US11002874
申请日：2004-12-01
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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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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公开(公告)号：US20050069048A1
公开(公告)日：2005-03-31
申请号：US10927149
申请日：2004-08-27
申请人： Jung Sig Jun , Tok Kim
发明人： Jung Sig Jun , Tok Kim
CPC分类号： H04L27/066 , H04L7/027 , H04N5/4401 , H04N21/4382
摘要： A device and method for a symbol recovery in a digital television are disclosed. The device includes a symbol clock recovery device includes a remained phase error remover operating a digital baseband real/imaginary number component signals, and removing remained phase error, a timing error detector nonlinearly operating the real/imaginary number component signals having the remained phase error removed, and detecting symbol clock phase error information therefrom, and an oscillating part generating a symbol clock frequency compensated to at least two times from the detected symbol clock phase error information and outputting the compensated frequency.
摘要翻译： 公开了一种用于数字电视中的符号恢复的装置和方法。 该装置包括符号时钟恢复装置，其包括操作数字基带实数/虚数分量信号的剩余相位误差去除器，以及去除剩余相位误差;非线性地操作具有剩余相位误差的实数/虚数分量信号的定时误差检测器被去除 以及检测符号时钟相位误差信息，以及振荡部分，从所检测的符号时钟相位误差信息产生至少补偿了两倍的符号时钟频率，并输出补偿后的频率。
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