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1. 发明申请

WO2009050552A3 DIGITAL VIDEO BROADCAST SERVICE DISCOVERY 审中-公开
标题翻译：数字视频广播服务发现
公开(公告)号：WO2009050552A3
公开(公告)日：2010-01-28
申请号：PCT/IB2008002639
申请日：2008-10-02
申请人： NOKIA CORP , NOKIA INC , LAHTONEN JYRKI , VESMA JUSSI , TUPALA MIIKA
发明人： LAHTONEN JYRKI , VESMA JUSSI , TUPALA MIIKA
IPC分类号： H04L27/26 , H04L5/00 , H04L27/233
CPC分类号： H04L27/2613 , H04L5/0007 , H04L5/005 , H04L5/0053 , H04L27/2331 , H04L27/2659 , H04L27/2675 , H04L27/2685
摘要： A first group of embodiments is 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 symbol. 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. The receiver does not have to know the reference sequence. A second group of embodiments is 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, 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：第一组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。接收器不必知道参考序列。第二组实施例旨在指定多个种子，其是每个具有r位的多个种子，其不具有值为零，通过向每个种子应用递归公式将种子扩展到相应的序列，使用序列作为梳状序列，并使用梳状序列以外的序列作为二进制相移键控模式。

2. 发明申请

WO2009056933A3 OFDM SYNCHRONIZATION USING TWO PILOT SYMBOLS HAVING A PREDETERMINED FREQUENCY SHIFT BETWEEN EACH OTHER 审中-公开
标题翻译：使用两个引导符号进行OFDM同步，每个引导符号在每个其他之间有一个预定的频率位移
公开(公告)号：WO2009056933A3
公开(公告)日：2009-11-19
申请号：PCT/IB2008002821
申请日：2008-10-17
申请人： NOKIA CORP , NOKIA INC , HENRIKSSON JUKKA ALLAN , TUPALA MIIKA , VESMA JUSSI
发明人： HENRIKSSON JUKKA ALLAN , TUPALA MIIKA , VESMA JUSSI
IPC分类号： H04L27/26 , H04L5/00
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 have first and second sets, respectively, of allowed, forbidden, and active carrier frequencies. The second sets of carrier frequencies are formed by frequency shifting the respective first sets by a predetermined frequency. A receiving method 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。第二组载波频率通过将各个第一组频移到预定频率而形成。一种接收方法是将第一接收导频符号的一部分频率转换为第一方向的一个载波间隔，在与第一方向相反的第二方向上将第二接收导频符号的一部分频率转换一个载波间隔，以及通过将第一和第二导频符号的频率转换部分乘以没有进行频率转换的导频符号的部分的复共轭，并将相乘结果求和来形成相关。

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