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    • 1. 发明申请
    • ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYNCHRONIZATION
    • 正交频分多址同步
    • US20090116374A1
    • 2009-05-07
    • US11934462
    • 2007-11-02
    • Jukka HenrikssonMiika Sakari TupalaJussi Vesma
    • Jukka HenrikssonMiika Sakari TupalaJussi Vesma
    • H04J11/00
    • H04L27/2675H04L5/0007H04L5/005H04L5/0053H04L27/2613H04L27/2656H04L27/2657
    • Embodiments are directed to first and second OFDM pilot symbols. The first and second pilot symbols may have first and second sets, respectively, of allowed, forbidden, and active carrier frequencies. The second sets of carrier frequencies may be formed by frequency shifting the respective first sets by a predetermined frequency, such as the frequency difference between adjacent carriers. An embodiment is directed to frequency translating part of a first received pilot symbol by one carrier interval in a first direction, frequency translating part of a second received pilot symbol by one carrier interval in a second direction that is opposite from the first direction, and forming a correlation by multiplying the frequency translated parts of the first and second pilot symbols by complex conjugates of parts of the pilot symbols upon which frequency translation has not been performed, and summing the multiplication results.
    • 实施例涉及第一和第二OFDM导频符号。 第一和第二导频符号可以分别具有允许,禁止和有效载波频率的第一和第二组。 第二组载波频率可以通过将相应的第一组频移到预定频率(例如相邻载波之间的频率差)来形成。 实施例涉及将第一接收导频符号的一部分频率转换为第一方向上的一个载波间隔,将第二接收导频符号的一部分频率平移到与第一方向相反的第二方向上的一个载波间隔,以及形成 通过将第一和第二导频符号的频率转换部分乘以不进行频率转换的导频符号的部分的复共轭并将乘法结果求和来进行相关。
    • 3. 发明授权
    • Orthogonal frequency division multiplexing synchronization
    • 正交频分复用同步
    • US08130631B2
    • 2012-03-06
    • US12637271
    • 2009-12-14
    • Jukka HenrikssonMiika TupalaJussi Vesma
    • Jukka HenrikssonMiika TupalaJussi Vesma
    • H04J11/00H04J9/00H04J3/06H04L5/04
    • H04L27/2675H04L5/0007H04L5/005H04L5/0053H04L27/2613H04L27/2656H04L27/2657
    • Embodiments are directed to first and second OFDM pilot symbols. The first and second pilot symbols may have first and second sets, respectively, of allowed, forbidden, and active carrier frequencies. The second sets of carrier frequencies may be formed by frequency shifting the respective first sets by a predetermined frequency, such as the frequency difference between adjacent carriers. An embodiment is directed to frequency translating part of a first received pilot symbol by one carrier interval in a first direction, frequency translating part of a second received pilot symbol by one carrier interval in a second direction that is opposite from the first direction, and forming a correlation by multiplying the frequency translated parts of the first and second pilot symbols by complex conjugates of parts of the pilot symbols upon which frequency translation has not been performed, and summing the multiplication results.
    • 实施例涉及第一和第二OFDM导频符号。 第一和第二导频符号可以分别具有允许,禁止和有效载波频率的第一和第二组。 第二组载波频率可以通过将相应的第一组频移到预定频率(例如相邻载波之间的频率差)来形成。 实施例涉及将第一接收导频符号的一部分频率转换为第一方向上的一个载波间隔,将第二接收导频符号的一部分频率平移到与第一方向相反的第二方向上的一个载波间隔,以及形成 通过将第一和第二导频符号的频率转换部分乘以不进行频率转换的导频符号的部分的复共轭并将乘法结果求和来进行相关。
    • 6. 发明授权
    • Digital broadcast service discovery correlation
    • 数字广播服务发现相关
    • US07787548B2
    • 2010-08-31
    • US11686636
    • 2007-03-15
    • Tommi AuranenHarri J. PekonenJussi VesmaPekka TalmolaJukka HenrikssonVisa KoivunenJani Vare
    • Tommi AuranenHarri J. PekonenJussi VesmaPekka TalmolaJukka HenrikssonVisa KoivunenJani Vare
    • H04K1/10
    • H04L27/0012H04L5/0007H04L5/0053H04L27/2613H04L2001/0093
    • Aspects of the invention are directed to service and channel discovery in a digital broadcast network. A pilot synchronization symbol, which has known characteristics, is included as a first symbol of digital broadcast frames. The pilot symbol, which can be decoded without having to resort to trial and error methods, contains parameters for the rest of the signal. So, the rest of the signal can be decoded without trial and error methods after the pilot symbol (and any additional synchronization symbols) is decoded. Channels containing digital video broadcast services can be efficiently detected using the known part of the signal. If the fixed known part is not found from the examined signal, then the signal will be considered a non-digital-video-broadcast signal or an empty channel, and the receiver can promptly proceed to a next channel/frequency. In this way, detecting non-digital-video-broadcast and empty channels becomes relatively fast.
    • 本发明的方面涉及数字广播网络中的服务和频道发现。 具有已知特征的导频同步符号被包括为数字广播帧的第一符号。 可以解码而无需诉诸试验和误差方法的导频符号包含信号其余部分的参数。 因此,在对导频符号(和任何附加的同步符号)进行解码之后,可以对信号的其余部分进行解码而无需尝试和错误的方法。 可以使用信号的已知部分有效地检测包含数字视频广播服务的信道。 如果从被检查的信号中没有找到固定的已知部分,则该信号将被认为是非数字视频广播信号或空信道,并且接收机可以迅速进行到下一个信道/频率。 以这种方式,检测非数字视频广播和空信道变得相对较快。
    • 7. 发明申请
    • Digital Broadcast Service Discovery Correlation
    • 数字广播服务发现相关
    • US20080225995A1
    • 2008-09-18
    • US11686636
    • 2007-03-15
    • Tommi AuranenHarri J. PekonenJussi VesmaPekka TalmolaJukka HenrikssonVisa KoivunenJani Vare
    • Tommi AuranenHarri J. PekonenJussi VesmaPekka TalmolaJukka HenrikssonVisa KoivunenJani Vare
    • H04L27/06
    • H04L27/0012H04L5/0007H04L5/0053H04L27/2613H04L2001/0093
    • Aspects of the invention are directed to service and channel discovery in a digital broadcast network. A pilot synchronization symbol, which has known characteristics, is included as a first symbol of digital broadcast frames. The pilot symbol, which can be decoded without having to resort to trial and error methods, contains parameters for the rest of the signal. So, the rest of the signal can be decoded without trial and error methods after the pilot symbol (and any additional synchronization symbols) is decoded. Channels containing digital video broadcast services can be efficiently detected using the known part of the signal. If the fixed known part is not found from the examined signal, then the signal will be considered a non-digital-video-broadcast signal or an empty channel, and the receiver can promptly proceed to a next channel/frequency. In this way, detecting non-digital-video-broadcast and empty channels becomes relatively fast.
    • 本发明的方面涉及数字广播网络中的服务和频道发现。 具有已知特征的导频同步符号被包括为数字广播帧的第一符号。 可以解码而无需诉诸试验和误差方法的导频符号包含信号其余部分的参数。 因此,在对导频符号(和任何附加的同步符号)进行解码之后,可以对信号的其余部分进行解码而无需尝试和错误的方法。 可以使用信号的已知部分有效地检测包含数字视频广播服务的信道。 如果从被检查的信号中没有找到固定的已知部分,则该信号将被认为是非数字视频广播信号或空信道,并且接收机可以迅速进行到下一个信道/频率。 以这种方式,检测非数字视频广播和空信道变得相对较快。
    • 10. 发明申请
    • Method and system for receiving a multi-carrier signal
    • 用于接收多载波信号的方法和系统
    • US20060116095A1
    • 2006-06-01
    • US10517937
    • 2002-06-20
    • Jukka Henriksson
    • Jukka Henriksson
    • H04B1/10
    • H04L1/0065H04L1/0045H04L5/0044H04L27/2657H04L27/2675H04L27/2691H04L2027/0077
    • Method and system for reducing impulsive burst noise in less delayed reception in pilot based OFDM systems, especially using DVB-T standard such as Digital Video Broadcasting (DVB) is provided. The method contains following steps: 1) recognition of the impulse position and possibly length in the time domain symbol, 2) blanking of those samples of the symbol where significant amount of impulse noise is present, 3) calculating the first estimate of the received signal from the blanked symbol, 4) deriving correction values for the carrier estimates by applying prior information (pilot carriers), and 5) the corrected estimate of the received symbol is derived by subtracting the correction values of step 4 from the first estimate of carriers derived in step 3. The method and arrangement allow correction of fairly long bursts of impulse noise with minor degradation only. The complexity of the scheme and the additional energy consumption are fairly low. The method provides considerably more effective more simple and less delay in broadcast data reception than previously known solutions in interfered multi-carrier signal reception.
    • 提供了一种用于在基于导频的OFDM系统中更少延迟接收中减少脉冲突发噪声的方法和系统,特别是使用诸如数字视频广播(DVB)的DVB-T标准。 该方法包括以下步骤:1)识别时域符号中的脉冲位置和可能的长度,2)消除具有显着量的脉冲噪声的符号的那些样本,3)计算接收信号的第一估计 4)通过应用先验信息(导频载波)导出用于载波估计的校正值,以及5)通过从导出的载波的第一估计中减去步骤4的校正值来导出接收符号的校正估计 在步骤3中。该方法和装置允许校正相当长的脉冲噪声突发,并且只有较小的降级。 该计划的复杂性和额外的能源消耗相当低。 广播数据接收中的方法比干扰多载波信号接收中的先前已知的解决方案提供了更加有效的更简单和更少的延迟。