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公开(公告)号：US20100091916A1
公开(公告)日：2010-04-15
申请号：US12637271
申请日：2009-12-14
IPC分类号： H04L27/06
CPC分类号： H04L27/2675 , H04L5/0007 , H04L5/005 , H04L5/0053 , H04L27/2613 , H04L27/2656 , H04L27/2657
摘要： 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.
摘要翻译： 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。
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2.发明申请System and Methods for Receiving OFDM Symbols Having Timing and Frequency Offsets 有权用于接收具有定时和频率偏移的OFDM符号的系统和方法公开(公告)号：US20090225822A1
公开(公告)日：2009-09-10
申请号：US12044026
申请日：2008-03-07
CPC分类号： H04L27/2659 , H04L27/2607 , H04L27/2613 , H04L27/2662 , H04L27/2666 , H04L27/2675 , H04L27/2678 , H04L2027/003 , H04L2027/0067 , H04L2027/0095 , H04N21/2383 , H04N21/4382 , H04N21/6112 , H04W28/06
摘要： Systems and methods for receiving an OFDM preamble without knowledge of channel characteristics are provided. An OFDM preamble signal with frequency shifted cyclic extensions is received. Taken together the cyclic extensions form a frequency shifted version of the OFDM preamble signal. Frequency offsets and timing offsets are estimated and corrected in an efficient manner using a simple concatenation approach in the time domain, followed by a summation of the OFDM preamble signal and the concatenation after a transformation of the OFDM preamble and the concatenation into the frequency domain. Phase errors in the frequency domain are estimated and corrected after FFT transformations of the received signals. A valid preamble is detected and additional parameters for receiving subsequently transmitted OFDM symbols in a channel are extracted from the OFDM preamble. The methods are computationally efficient and robust. Receiver implementations for performing the methods in a DVB receiver are disclosed.
摘要翻译： 提供了不知道信道特性的用于接收OFDM前同步码的系统和方法。 接收具有频移循环扩展的OFDM前导码信号。 将循环扩展合并在一起形成OFDM前导码信号的频移版本。 使用时域中的简单级联方法以频率偏移和定时偏移来估计和校正频率偏移量，然后在OFDM前导信号和OFDM前导码的变换和频域之间的级联之后进行总和。 在接收到的信号的FFT变换之后，对频域中的相位误差进行估计和校正。 检测有效的前导码，并且从OFDM前导码中提取用于在信道中接收随后发送的OFDM符号的附加参数。 该方法具有计算效率和鲁棒性。 公开了用于在DVB接收机中执行方法的接收机实现。
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3.发明授权System and methods for receiving OFDM symbols having timing and frequency offsets 有权用于接收具有定时和频率偏移的OFDM符号的系统和方法公开(公告)号：US08208522B2
公开(公告)日：2012-06-26
申请号：US12044026
申请日：2008-03-07
CPC分类号： H04L27/2659 , H04L27/2607 , H04L27/2613 , H04L27/2662 , H04L27/2666 , H04L27/2675 , H04L27/2678 , H04L2027/003 , H04L2027/0067 , H04L2027/0095 , H04N21/2383 , H04N21/4382 , H04N21/6112 , H04W28/06
摘要： Systems and methods for receiving an OFDM preamble without knowledge of channel characteristics are provided. An OFDM preamble signal with frequency shifted cyclic extensions is received. Taken together the cyclic extensions form a frequency shifted version of the OFDM preamble signal. Frequency offsets and timing offsets are estimated and corrected in an efficient manner using a simple concatenation approach in the time domain, followed by a summation of the OFDM preamble signal and the concatenation after a transformation of the OFDM preamble and the concatenation into the frequency domain. Phase errors in the frequency domain are estimated and corrected after FFT transformations of the received signals. A valid preamble is detected and additional parameters for receiving subsequently transmitted OFDM symbols in a channel are extracted from the OFDM preamble. The methods are computationally efficient and robust. Receiver implementations for performing the methods in a DVB receiver are disclosed.
摘要翻译： 提供了不知道信道特性的用于接收OFDM前同步码的系统和方法。 接收具有频移循环扩展的OFDM前导码信号。 将循环扩展合并在一起形成OFDM前导码信号的频移版本。 使用时域中的简单级联方法以频率偏移和定时偏移来估计和校正频率偏移量，然后在OFDM前导信号和OFDM前导码的变换和频域之间的级联之后进行总和。 在接收到的信号的FFT变换之后，对频域中的相位误差进行估计和校正。 检测有效的前导码，并且从OFDM前导码中提取用于在信道中接收随后发送的OFDM符号的附加参数。 该方法具有计算效率和鲁棒性。 公开了用于在DVB接收机中执行方法的接收机实现。
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公开(公告)号：US20090116374A1
公开(公告)日：2009-05-07
申请号：US11934462
申请日：2007-11-02
IPC分类号： H04J11/00
CPC分类号： H04L27/2675 , H04L5/0007 , H04L5/005 , H04L5/0053 , H04L27/2613 , H04L27/2656 , H04L27/2657
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US07652980B2
公开(公告)日：2010-01-26
申请号：US11934462
申请日：2007-11-02
IPC分类号： H04J11/00
CPC分类号： H04L27/2675 , H04L5/0007 , H04L5/005 , H04L5/0053 , H04L27/2613 , H04L27/2656 , H04L27/2657
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US08351555B2
公开(公告)日：2013-01-08
申请号：US13020168
申请日：2011-02-03
申请人： Sergei Semenov , Kjell Ostman , Andre Malkov , Jussi Vesma , Risto Paatelma
发明人： Sergei Semenov , Kjell Ostman , Andre Malkov , Jussi Vesma , Risto Paatelma
IPC分类号： H04B1/10
CPC分类号： H04B17/336
摘要： In an example embodiment a method comprises receiving at least one data stream from at least two transmitter antennas, wherein the at least one data stream is pre-coded by a set of weighting coefficients; receiving a pilot channel from each of the at least two transmitter antennas; processing the received at least one data stream by an equalizer with a set of equalizer filter coefficients; calculating for each of the at least one data stream following: a signal power and an interference power from other stream, if there is any intererence, at least in part based on a set of post equalizer channel coefficients and the set of weighting coefficients; a noise power at least in part based on the received pilot channels and the set of weighting coefficients; and a signal to interference and noise ratio based on the corresponding calculated signal power, interference power and noise power.
摘要翻译： 在示例实施例中，一种方法包括从至少两个发射机天线接收至少一个数据流，其中所述至少一个数据流被一组加权系数预编码; 从所述至少两个发射机天线中的每一个接收导频信道; 通过均衡器处理所接收的至少一个数据流与一组均衡器滤波器系数; 至少部分地基于一组后均衡器信道系数和所述加权系数集合来计算所述至少一个数据流中的每一个，其中：来自其他流的信号功率和干扰功率，如果存在任何干扰， 至少部分地基于所接收的导频信道和所述一组加权系数的噪声功率; 并且基于相应的计算出的信号功率，干扰功率和噪声功率的信号与干扰和噪声比。
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公开(公告)号：US08261308B2
公开(公告)日：2012-09-04
申请号：US12017242
申请日：2008-01-21
申请人： Jani Vare , Jussi Vesma
发明人： Jani Vare , Jussi Vesma
IPC分类号： H04N7/16
CPC分类号： H04L5/0053 , H04L5/0094
摘要： Aspects of the invention are directed to a cell-frequency-link descriptor configured to map network-specific parameters with time frequency slicing (TFS) information in a digital video broadcast system. The cell-frequency-link descriptor may include fields that provide a mapping between a cell identifier, a TFS group identifier, a bandwidth, a guard interval, a transmission mode, and a frequency. The fields may provide a mapping between cells, frequencies, TFS groups, related guard intervals, bandwidths, and transmission modes for multiple cells within the digital video broadcast system. The fields may include: a cell identifier field, a TFS-group identifier field, a bandwidth field, a guard interval field, a transmission mode field, a frequency field, a cell identifier extension field, and a transposer frequency field.
摘要翻译： 本发明的方面涉及一种细胞 - 频率 - 链路描述符，其被配置为在数字视频广播系统中将具有时间频率分割（TFS）信息的网络特定参数映射。 小区 - 频率 - 链路描述符可以包括提供小区标识符，TFS组标识符，带宽，保护间隔，传输模式和频率之间的映射的字段。 这些字段可以提供数字视频广播系统内的多个小区的小区，频率，TFS组，相关的保护间隔，带宽和传输模式之间的映射。 这些字段可以包括：小区标识符字段，TFS组标识符字段，带宽字段，保护间隔字段，传输模式字段，频率字段，小区标识符扩展字段和转置器频率字段。
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公开(公告)号：US08045628B2
公开(公告)日：2011-10-25
申请号：US11874359
申请日：2007-10-18
申请人： Jyrki Lahtonen , Jussi Vesma , Miika Tupala
发明人： Jyrki Lahtonen , Jussi Vesma , Miika Tupala
IPC分类号： H04K1/10
CPC分类号： H04L27/2613 , H04L5/0007 , H04L5/005 , H04L5/0053 , H04L27/2331 , H04L27/2659 , H04L27/2675 , H04L27/2685
摘要： Embodiments are directed to binary phase shift key modulating a first pilot symbol according to a reference sequence, and differentially binary phase shift key modulating a second pilot symbols. The original reference sequence and the delayed differentially modulated sequence are then combined before performing an Inverse Fast Fourier Transform and inserting a guard interval. Receiver operations are an inverse of the transmitter operations, which were just discussed. The receiver does not have to know the reference sequence. Embodiments are directed to specifying a plurality of seeds that are bit patterns each having r bits not all of which have a value of zero, extending the seeds into respective sequences by applying to each seed a recurrence formula; and using one of the sequences as a comb sequence and using the sequences other than the comb sequence as binary phase shift keying patterns.
摘要翻译： 实施例涉及根据参考序列调制第一导频符号的二进制相移键，以及调制第二导频符号的差分二进制相移键。 然后在执行快速傅立叶逆变换和插入保护间隔之前组合原始参考序列和延迟差分调制序列。 接收机操作是发射机操作的倒数，这些操作刚刚讨论过。 接收器不必知道参考序列。 实施例涉及指定多个种子，其是每个具有r位的位模式，并不都具有零值，通过向每个种子应用递归公式将种子延伸到各个序列中; 并使用序列之一作为梳状序列，并使用除了梳状序列以外的序列作为二进制相移键控模式。
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公开(公告)号：US07877663B2
公开(公告)日：2011-01-25
申请号：US10578424
申请日：2004-10-26
申请人： Jussi Vesma , Harri Pekonen
发明人： Jussi Vesma , Harri Pekonen
IPC分类号： H03M13/00
CPC分类号： H04L1/0045 , H03M13/1515 , H03M13/373
摘要： Elements of a coding table which are error-free are found at S2. At S3, corresponding elements in an erasure information table are completed, indicating that the elements in the coding array are correct. A counter is initialized at Nmax, which is the maximum number of errors that can be corrected, at S4. At S5, the row of the erasure information table is scanned beginning from the first parity column for empty elements. Each empty parity date element of the erasure information table row is marked as incorrect at S7 For each such element, the counter is decremented at S8. At S9, the elements of the erasure information table are scanned from the first column of the application data and zero padding section for empty elements. At step S11, an empty element is marked as incorrect. At step S12, the counter is then decremented. It is determined at step S13 whether or not the counter is equal to zero. When the counter becomes is equal to zero, operation proceeds to step S14 where the decoder operates to fill remaining empty elements in the erasure information row as correct. Thus, whilst the count of incorrect elements for the row has not exceeded a maximum and whilst empty elements remain, empty elements of the erasure table row are marked as incorrect beginning with parity data elements and then continuing from the application data end.
摘要翻译： 在S2中找到无错误的编码表的元素。 在S3，擦除信息表中的相应元素完成，指示编码数组中的元素是正确的。 在S4处，计数器被初始化为Nmax，其是可以校正的最大错误数。 在S5，从空白元素的第一奇偶校验列开始扫描擦除信息表的行。 擦除信息表行的每个空的奇偶校验日期元素在S7中被标记为不正确对于每个这样的元件，在S8处计数器递减。 在S9中，从应用数据的第一列和空元素的零填充部分扫描擦除信息表的元素。 在步骤S11中，空元素被标记为不正确。 在步骤S12，计数器然后递减。 在步骤S13中确定计数器是否等于零。 当计数器变为零时，操作进行到步骤S14，其中解码器操作以填充擦除信息行中的剩余空元素作为正确的。 因此，虽然该行的不正确的元素的计数没有超过最大值，而当剩余空元素时，擦除表行的空元素被标记为不正确，从奇偶校验数据元素开始，然后从应用数据结束继续。
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公开(公告)号：US20080225778A1
公开(公告)日：2008-09-18
申请号：US11686600
申请日：2007-03-15
申请人： Jani Vare , Jussi Vesma , Harri Pekonen , Tommi Auranen
发明人： Jani Vare , Jussi Vesma , Harri Pekonen , Tommi Auranen
CPC分类号： H04N21/435 , H04H20/26 , H04H60/72 , H04N21/235 , H04N21/26283 , H04N21/6131 , H04N21/64322 , H04N21/8126
摘要： Aspects of the invention are directed to service discovery in a digital broadcast network. A service discovery descriptor, which may be electronic service guide-provider and cell specific, provides mapping between a service identifier, a logical channel identifier, and a physical channel, which may be characterized by a frame identifier and a slot identifier, that is, each physical channel may have one or more slots within one or more frames. A neighboring service discovery descriptor provides mapping for the service available within neighboring cells. Aspects of the invention are directed to an encapsulation protocol that encapsulates variable length data, including, but not limited to, the service discovery descriptor and the neighboring service discovery descriptor, into fixed length data stream packets.
摘要翻译： 本发明的方面涉及数字广播网络中的服务发现。 可以是电子服务指南提供者和小区特定的服务发现描述符提供服务标识符，逻辑信道标识符和物理信道之间的映射，其可以由帧标识符和时隙标识符来表征， 每个物理信道可以在一个或多个帧内具有一个或多个时隙。 相邻服务发现描述符为相邻小区中可用的服务提供映射。 本发明的方面涉及将可变长度数据（包括但不限于服务发现描述符和相邻服务发现描述符）封装成固定长度数据流分组的封装协议。
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