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    • 2. 发明授权
    • Method and apparatus for fine frequency synchronization in multi-carrier demodulation systems
    • 多载波解调系统中精细频率同步的方法和装置
    • US07061997B1
    • 2006-06-13
    • US09673270
    • 1998-04-14
    • Ernst EberleinSabah BadriStefan LippStephan BuchholzAlbert HeubergerHeinz Gerhaeuser
    • Ernst EberleinSabah BadriStefan LippStephan BuchholzAlbert HeubergerHeinz Gerhaeuser
    • H03D3/22H01J11/00
    • H04L27/266H04L27/2679
    • A method and an apparatus relating to a fine frequency synchronization compensating for a carrier frequency deviation from an oscillator frequency in a multi-carrier demodulation system of the type capable of carrying out a differential phase decoding of multi-carrier modulated signals, the signals comprising a plurality of symbols, each symbol being defined by phase differences between simultaneous carriers having different frequencies. A phase difference between phases of the same carrier in different symbols is determined. Thereafter, a frequency offset is determined by eliminating phase shift uncertainties related to the transmitted information from the phase difference making use of a M-PSK decision device. Finally, a feedback correction of the carrier frequency deviation is performed based on the determined frequency offset. Alternatively, an averaged frequency offset can be determined by averaging determined frequency offsets of a plurality of carriers. Then, the feedback correction of the frequency deviation is performed based on the averaged frequency offset.
    • 一种在能够执行多载波调制信号的差分相位解码的类型的多载波解调系统中补偿来自振荡器频率的载波频率偏差的精细频率同步的方法和装置,所述信号包括 多个符号,每个符号由具有不同频率的同时载波之间的相位差定义。 确定不同符号中相同载波的相位之间的相位差。 此后,通过利用使用M-PSK判定装置的相位差消除与发送的信息有关的相移不确定性来确定频率偏移。 最后,基于确定的频率偏移来执行载波频率偏差的反馈校正。 或者,可以通过平均确定的多个载波的频率偏移来确定平均频率偏移。 然后,基于平均的频率偏移来执行频率偏差的反馈校正。
    • 4. 发明授权
    • Coarse frequency synchronization in multicarrier systems
    • 多载波系统中的粗频同步
    • US06993094B1
    • 2006-01-31
    • US09673265
    • 1998-04-14
    • Ernst EberleinSabah BadriStefan LippStephan BuchholzAlbert HeubergerHeinz Gerhaeuser
    • Ernst EberleinSabah BadriStefan LippStephan BuchholzAlbert HeubergerHeinz Gerhaeuser
    • H04L27/22H04L27/06
    • H04L27/2613H04L27/2659H04L27/2675H04L2027/003
    • A method and apparatus provide coarse frequency synchronization compensating for a carrier frequency deviation from an oscillator frequency in a demodulation system capable of demodulating a signal having a frame structure with at least one useful symbol and a reference symbol which is an amplitude-modulated sequence. A received and down-converted signal undergoes amplitude-demodulation to generate an envelope that is correlated with a predetermined reference pattern to determine the carrier frequency deviation. Finally, the oscillator frequency is controlled based on the carrier frequency deviation. The reference symbol may comprise two identical sequences. In this case, the envelope obtained by the amplitude-demodulation has two portions which are based on the identical sequences. One of the portions of the envelope is correlated with the other one of the portions in order to determine the carrier frequency deviation. The oscillator frequency is controlled based on the determined carrier frequency deviation.
    • 一种方法和装置,在能够解调具有至少一个有用符号的帧结构的信号和作为幅度调制序列的参考符号的解调系统中,提供补偿来自振荡器频率的载波频率偏差的粗略频率同步。 接收和下变频信号进行幅度解调以产生与预定参考模式相关联的包络线以确定载波频率偏差。 最后,振荡器频率根据载波频率偏差进行控制。 参考符号可以包括两个相同的序列。 在这种情况下,通过幅度解调获得的包络具有基于相同序列的两部分。 为了确定载波频率偏差,包络线的一部分与另一部分相关。 基于确定的载波频率偏差来控制振荡器频率。
    • 5. 发明授权
    • Coarse frequency synchronisation in multicarrier systems
    • 多载波系统中的粗频同步
    • US06993084B1
    • 2006-01-31
    • US09673271
    • 1998-04-14
    • Ernst EberleinSabah BadriStefan LippStephan BuchholzAlbert HeubergerHeinz Gerhaeuser
    • Ernst EberleinSabah BadriStefan LippStephan BuchholzAlbert HeubergerHeinz Gerhaeuser
    • H04L27/28
    • H04L27/2613H04L5/0048H04L27/2605H04L27/2656H04L27/2657H04L27/2675
    • A method for generating a signal having a frame structure, each frame of the frame structure comprising at least one useful symbol, a guard interval associated to the at least one useful symbol and a reference symbol, comprises the steps of performing an amplitude modulation of a bit sequence such that the envelope of the amplitude modulated bit sequence defines a reference pattern of the reference symbol and inserting the amplitude modulated bit sequence into said signal as said reference symbol. A method for frame synchronization of a signal having such a frame structure comprises the steps of receiving the signal, down-converting the received signal, performing an amplitude-demodulation of the down-converted signal in order to generate an envelope, correlating the envelope with a predetermined reference pattern in order to detect a signal reference pattern of the reference symbol in the signal, and performing the frame synchronization based on the detection of the signal reference pattern.
    • 一种用于产生具有帧结构的信号的方法,所述帧结构的每个帧包括至少一个有用符号,与所述至少一个有用符号相关联的保护间隔和参考符号,包括以下步骤:执行幅度调制 使得幅度调制比特序列的包络定义参考符号的参考模式,并将幅度调制比特序列插入到作为所述参考符号的所述信号中。 一种用于具有这种帧结构的信号的帧同步的方法包括以下步骤:接收信号,对接收到的信号进行下变频,对下变频信号进行幅度解调,以产生包络,将信封与 预定的参考图案,以便检测信号中参考符号的信号参考模式,并且基于信号参考模式的检测来执行帧同步。
    • 6. 发明授权
    • Terrestrial transmitting station for transmitting a terrestrial broadcast signal, satellite-aided broadcast system and receiver for a satellite-aided broadcast system
    • 用于发射地面广播信号的地面发射站,用于卫星辅助广播系统的卫星辅助广播系统和接收机
    • US08369774B2
    • 2013-02-05
    • US11917588
    • 2006-06-14
    • Ernst EberleinAlbert HeubergerMarco BreilingStefan Lipp
    • Ernst EberleinAlbert HeubergerMarco BreilingStefan Lipp
    • H04B7/185
    • H04H20/06H04H20/28H04H20/42H04H40/90
    • A terrestrial transmitting station for sending out a terrestrial broadcast signal includes a first receiver for receiving a signal to obtain a satellite receive signal, a second receiver for receiving a local signal to obtain a local receive signal and a signal combiner for combining the first receive signal with the local receive signal to form a combination signal. The signal combiner is implemented to generate the combination signal so that the combination signal is formed according to a hierarchical modulation, wherein the first receive signal is contained in a base layer of the hierarchical modulation and wherein the local receive signal is contained in an overlay layer of the hierarchical modulation. A terrestrial transmitting station further includes a transmitter for sending out the combination signal. A broadcast system includes a first transmitter and at least one terrestrial transmitting station. The information emitted from the satellite-based broadcast system may be received using an associated receiver. An inventive broadcast system allows adding a local information to a supraregionally emitted transmit signal in a frequency-efficient way.
    • 用于发送地面广播信号的地面发射站包括用于接收信号以获得卫星接收信号的第一接收机,用于接收本地信号以获得本地接收信号的第二接收机和用于组合第一接收信号的信号组合器 与本地接收信号形成组合信号。 信号组合器被实现以产生组合信号,使得根据分级调制形成组合信号,其中第一接收信号被包含在分层调制的基层中,并且其中本地接收信号包含在覆盖层 的分层调制。 地面发射站还包括用于发出组合信号的发射机。 广播系统包括第一发射机和至少一个地面发射台。 从基于卫星的广播系统发射的信息可以使用关联的接收机来接收。 本发明的广播系统允许以频率有效的方式将本地信息添加到超分辨发射的发射信号。
    • 7. 发明申请
    • Terrestrial Transmitting Station for Transmitting a Terrestrial Broadcast Signal, Satellite-Aided Broadcast System and Receiver for a Satellite-Aided Broadcast System
    • 用于传输地面广播信号的地面发射台,用于卫星辅助广播系统的卫星辅助广播系统和接收机
    • US20080200114A1
    • 2008-08-21
    • US11917588
    • 2006-06-14
    • Ernst EberleinAlbert HeubergerMarco BreilingStefan Lipp
    • Ernst EberleinAlbert HeubergerMarco BreilingStefan Lipp
    • H04H20/74
    • H04H20/06H04H20/28H04H20/42H04H40/90
    • A terrestrial transmitting station for sending out a terrestrial broadcast signal includes a first receiver for receiving a signal to obtain a satellite receive signal, a second receiver for receiving a local signal to obtain a local receive signal and a signal combiner for combining the first receive signal with the local receive signal to form a combination signal. The signal combiner is implemented to generate the combination signal so that the combination signal is formed according to a hierarchical modulation, wherein the first receive signal is contained in a base layer of the hierarchical modulation and wherein the local receive signal is contained in an overlay layer of the hierarchical modulation. A terrestrial transmitting station further includes a transmitter for sending out the combination signal. A broadcast system includes a first transmitter and at least one terrestrial transmitting station. The information emitted from the satellite-based broadcast system may be received using an associated receiver. An inventive broadcast system allows adding a local information to a supraregionally emitted transmit signal in a frequency-efficient way.
    • 用于发送地面广播信号的地面发射站包括用于接收信号以获得卫星接收信号的第一接收机,用于接收本地信号以获得本地接收信号的第二接收机和用于组合第一接收信号的信号组合器 与本地接收信号形成组合信号。 信号组合器被实现以产生组合信号,使得根据分级调制形成组合信号,其中第一接收信号被包含在分层调制的基层中,并且其中本地接收信号包含在覆盖层 的分层调制。 地面发射站还包括用于发出组合信号的发射机。 广播系统包括第一发射机和至少一个地面发射台。 从基于卫星的广播系统发射的信息可以使用关联的接收机来接收。 本发明的广播系统允许以频率有效的方式将本地信息添加到超分辨发射的发射信号。