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    • 1. 发明申请
    • RECEIVER AND METHOD OF RECEIVING
    • 接收者和接收方法
    • WO2017013402A1
    • 2017-01-26
    • PCT/GB2016/052131
    • 2016-07-14
    • SONY CORPORATIONSONY EUROPE LIMITED
    • ATUNGSIRI, Samuel Asangbeng
    • H04L27/26
    • H04L27/2665H04L27/2649H04L27/2671H04L27/2675
    • A receiver comprises a radio frequency demodulation circuit configured to detect and to recover a received signal. The received signal includes in one or more frames a preamble comprising a plurality of bootstrap OFDM symbols. A first of the bootstrap OFDM symbols has a first time domain structure configured so that a receiver can synchronise to a useful part of the bootstrap OFDM symbols and one or more of the other bootstrap OFDM symbols have at least a second time domain structure and carry layer one signalling data indicating parameters for detecting and recovering payload data carried by the one or more frames. The receiver comprises a detector circuit configured to detect from one or more of the bootstrap OFDM symbols a synchronisation timing and an inverse Fourier transformer configured to convert the temporal length of the bootstrap OFDM symbols or the payload OFDM symbols from the time domain into the frequency domain in accordance with the identified synchronisation timing. The detection circuit includes a first correlator adapted to the first time domain structure of the first bootstrap OFDM symbol and one or more second correlators adapted to the second time domain structure of the one or more other bootstrap OFDM symbols, one or more delay units configured to delay a first correlation result produced by the first correlator and the at least one second correlation result produced by the one or more second correlators so that the correlation results are produced contemporaneously for the first and the one or more other bootstrap OFDM symbols of the preamble. A combined signal identifying the synchronisation timing for converting the temporal length of the OFDM symbols from the time domain to the frequency domain is provided which improves an accuracy of the identified synchronisation timing.
    • 接收机包括被配置为检测并恢复接收信号的射频解调电路。 所接收的信号在一个或多个帧中包括包括多个自举OFDM符号的前导码。 引导OFDM符号中的第一个具有第一时域结构,其被配置为使得接收机可以与自举OFDM符号的有用部分同步,并且一个或多个另外的引导OFDM符号具有至少第二时域结构和承载层 一个信令数据,指示用于检测和恢复由一个或多个帧携带的有效载荷数据的参数。 接收机包括检测器电路,其被配置为从一个或多个自举OFDM符号检测同步定时和被配置为将引导OFDM符号或有效载荷OFDM符号的时间长度从时域转换为频域的反傅立叶变换器 根据所识别的同步定时。 检测电路包括适于第一自举OFDM符号的第一时域结构的第一相关器和适于一个或多个其他引导OFDM符号的第二时域结构的一个或多个第二相关器,一个或多个延迟单元,被配置为 延迟由第一相关器产生的第一相关结果和由一个或多个第二相关器产生的至少一个第二相关结果,使得对于前同步码的第一个和多个其他引导OFDM符号同时产生相关结果。 提供了识别用于将OFDM符号的时间长度从时域转换到频域的同步定时的组合信号,其提高了所识别的同步定时的精度。
    • 3. 发明申请
    • DIGITAL BEAM-FORMING NETWORK HAVING A REDUCED COMPLEXITY AND ARRAY ANTENNA COMPRISING THE SAME
    • 具有降低复杂度的数字波束形成网络和包含其的阵列天线
    • WO2015092478A1
    • 2015-06-25
    • PCT/IB2013/003261
    • 2013-12-20
    • AGENCE SPATIALE EUROPÉENNE
    • ANGELETTI, PieroLISI, Marco
    • H01Q3/26
    • H04B7/0456H01Q3/26H04L27/2665
    • A digital beam-forming network (DBF) for an array antenna having N > 1 antenna ports (EP), to be associated to respective antenna elements (RE), and M ≥ 1 beam ports (BP), corresponding to respective antenna beams (AB), said digital beam-forming network comprising a plurality of complex weighting elements (CWE-SE, CWE-SB, CWE-SESB) interconnected through summing nodes (SN); characterized in that at least one of said complex weighting element is connected to either two antenna ports, to be associated to respective antenna elements which are arranged symmetrically with respect to said symmetry axis, or two beam ports corresponding to respective antenna beams pointing toward directions which are symmetrical with respect to said symmetry axis, or both. An array antenna comprising N antenna elements, N s of which are arranged according to an array pattern having a symmetry axis, N s being an even integer different from zero, and such a digital beam-forming network.
    • 用于阵列天线的数字波束形成网络(DBF),其具有N个1个天线端口(EP),与各个天线元件(RE)相关联,并且M≥1个波束端口(BP)对应于相应的天线波束 AB),所述数字波束形成网络包括通过求和节点(SN)互连的多个复加权元素(CWE-SE,CWE-SB,CWE-SESB); 其特征在于,所述复加权元件中的至少一个连接到两个天线端口,以与相应于所述对称轴对称布置的相应天线元件相关联,或两个波束端口对应于指向 相对于所述对称轴对称,或两者对称。 包括N个天线元件的阵列天线,N个天线元件根据具有对称轴的阵列图案Ns排列,Ns是不同于零的偶数整数,以及这样的数字波束形成网络。
    • 4. 发明申请
    • IMPLICIT SIGNALLING IN OFDM PREAMBLE WITH EMBEDDED SIGNATURE SEQUENCE, AND CYCLIC PREFIX AND POSTFIX AIDED SIGNATURE DETECTION
    • 具有嵌入式签名序列的OFDM前缀中的隐含信号,以及循环前缀和POSTFIX辅助签名检测
    • WO2015001313A1
    • 2015-01-08
    • PCT/GB2014/051922
    • 2014-06-24
    • SONY CORPORATIONSONY EUROPE LIMITED
    • ATUNGSIRI, Samuel Asangbeng
    • H04L1/00H04L27/26
    • H04L27/2607H04L27/2613H04L27/2627H04L27/2649H04L27/2655H04L27/2663H04L27/2665H04L27/2678H04L27/2685
    • A transmitter for transmitting payload data using Orthogonal Frequency Division Multiplexed (OFDM) symbols, the transmitter comprising a frame builder configured to receive the payload data to be transmitted and to receive signalling data for use in detecting and recovering the payload data at a receiver, and to form the payload data with the signalling data into frames for transmission. The transmitter also comprising a modulator configured to modulate a first OFDM symbol with the signalling data and to modulate one or more second OFDM symbols with the payload data, a signature sequence processor circuit for providing a signature sequence, a combiner circuit for superimposing the signature sequence over the first OFDM symbol, a prefixing circuit for prefixing a guard interval to the first OFDM symbol to form a preamble, and a transmission circuit for transmitting the preamble and the one or more second OFDM symbols. The combiner is configured to combine the signature sequence with the first OFDM symbol, and the guard interval is formed from time domain samples of a part of the signature sequence. By arranging for the guard interval of the OFDM symbol carrying the signalling data to include samples formed only from the part of the signature sequence, there is any increased likelihood of a receiver detecting the signature sequence. To increase robustness against multipath, a postfix might be added on top of the prefix proposed.
    • 一种用于使用正交频分复用(OFDM)符号发送有效载荷数据的发射机,所述发射机包括被构造成接收待发射的有效载荷数据并接收信令数据的帧构造器,用于在接收机处检测和恢复有效载荷数据,以及 以将信令数据的有效载荷数据形成帧以进行传输。 所述发射机还包括调制器,其被配置为用所述信令数据调制第一OFDM符号并且利用所述有效载荷数据来调制一个或多个第二OFDM符号,用于提供签名序列的签名序列处理器电路,用于叠加所述签名序列的组合器电路 在第一OFDM符号之上,用于将保护间隔前缀到第一OFDM符号以形成前导码的前缀电路,以及用于发送前导码和一个或多个第二OFDM符号的发送电路。 组合器被配置为将签名序列与第一OFDM符号组合,并且保护间隔由签名序列的一部分的时域样本形成。 通过安排携带信令数据的OFDM符号的保护间隔来包括仅从签名序列的一部分形成的样本,接收机检测签名序列的可能性增加。 为了增强对多路径的鲁棒性,可以在提出的前缀之上添加后缀。
    • 5. 发明申请
    • IMPROVED REFERENCE SIGNALS DESIGN FOR TIME TRACKING IN LTE-A
    • 改进LTE-A时间跟踪的参考信号设计
    • WO2013096129A9
    • 2014-07-17
    • PCT/US2012069865
    • 2012-12-14
    • QUALCOMM INC
    • CHEN WANSHILUO TAOHUANG YIGAAL PETER
    • H04W56/00H04W48/12
    • H04L5/0048H04L5/0007H04L5/0051H04L25/0202H04L27/2613H04L27/2665H04W72/04
    • Time tracking in current communication systems may be traditionally based on common reference signals (CRS). However, in certain communication systems, CRS-based time tracking may be impossible to implement due to an absence of CRS in certain subframes or carriers. CRS-based time tracking may also be inappropriate to implement in certain communication systems such as a coordinated multipoint (CoMP) system where control and data may arrive from different cells, and therefore, a UE may assume a wrong cell for CRS-based time tracking. Accordingly, methods, apparatuses, and computer program products for wireless communication are provided in which additional UE specific reference signals (UE-RS) and/or channel state information reference signals (CSI-RS) are made available to the UE so that the UE may have improved channel estimation and/or time tracking performance.
    • 当前通信系统中的时间跟踪传统上可以基于公共参考信号(CRS)。 然而,在某些通信系统中,由于某些子帧或载波中没有CRS,基于CRS的时间跟踪可能是不可能实现的。 基于CRS的时间跟踪也可能不适于在诸如协调多点(CoMP)系统的某些通信系统中实现,其中控制和数据可以从不同的小区到达,因此,UE可以假设用于基于CRS的时间跟踪的错误小区 。 因此,提供了用于无线通信的方法,装置和计算机程序产品,其中附加的UE特定参考信号(UE-RS)和/或信道状态信息参考信号(CSI-RS)对于UE是可用的,使得UE 可以改善信道估计和/或时间跟踪性能。
    • 6. 发明申请
    • 受信装置および受信方法
    • 接收装置和接收方法
    • WO2013035146A1
    • 2013-03-14
    • PCT/JP2011/070160
    • 2011-09-05
    • 三菱電機株式会社門田 行広藤原 卓
    • 門田 行広藤原 卓
    • H04J11/00
    • H04L27/38H04L27/2665H04L27/2676
    •  本発明は、FFT後の信号が周波数領域上において位相回転することを防ぐことが可能な受信装置および受信方法を提供することを目的とする。そして、本発明による受信装置は、OFDM変調信号を所定の周波数帯域に変換した信号を入力しOFDM変調信号の時間領域上で直交復調を行い時間領域信号を出力する直交復調部と、時間領域信号に対してFFTを行うFFT窓の位置を制御し当該FFT窓に対応するFFTデータを出力する窓制御部と、FFTデータに対してFFTを行い周波数領域データを出力するFFT部と、周波数領域データに対して復号を行うデータ復号部とを備え、窓制御部は、時間領域信号から遅延量が異なる複数の遅延信号を生成する信号遅延部と、時間領域信号と複数の遅延信号とのうちいずれか2つを所定の切替タイミングに基づいて切り替えて出力するスイッチを有し、当該スイッチの出力信号を含むFFTデータを出力する信号切替部とを備える。
    • 本发明的目的是提供一种能够防止FFT之后的信号在频域上相位旋转的接收装置和接收方法。 接收装置包括:正交解调单元,其接收通过将OFDM调制信号转换为预定频带而获得的信号,并对OFDM调制信号的时域执行正交解调,从而输出时域 信号; 窗口控制单元,其控制FFT窗口的位置,其中将对时域信号执行FFT,并输出对应于FFT窗口的FFT数据; FFT单元,对FFT数据执行FFT,并输出频域数据; 以及对频域数据执行解码的数据解码单元。 窗口控制单元包括:信号延迟单元,其从时域信号产生具有不同延迟量的多个延迟信号; 以及信号切换单元,其具有用于基于预定的开关定时在任意两个时域信号和多个延迟信号之间切换的开关,并输出包括开关的输出信号的FFT数据。
    • 9. 发明申请
    • MONITORING AND CORRECTING TIMING ERRORS IN WIRELESS COMMUNICATION
    • 监测和校正无线通信中的时序错误
    • WO2011062990A1
    • 2011-05-26
    • PCT/US2010/057039
    • 2010-11-17
    • QUALCOMM INCORPORATEDYOO, TaesangGAAL, PeterLUO, Tao
    • YOO, TaesangGAAL, PeterLUO, Tao
    • H04L27/26
    • H04L27/2673H04L27/2665
    • Providing for improved tracking and correction of timing in wireless communications is disclosed herein. By way of example, a first algorithm can be employed to track timing of a wireless signal, based on one dimension of the signal. Additionally, a second algorithm based on a different dimension of the signal can be employed to verify the timing and reduce errors in timing analysis. Various signal dimensions can be employed for the analysis, including cyclic prefix, frequency, channel impulse response, or the like, or a combination thereof. Additionally, different channels of the wireless signal can also be analyzed by the first algorithm and the second algorithm. Furthermore, the second algorithm can be selected to reduce deficiencies identified in the first algorithm, to improve overall timing analysis, reduce undetected timing errors or false errors, and improve timing correction.
    • 本文公开了提供无线通信中的改进的定时跟踪和校正。 作为示例,可以采用第一算法来基于信号的一个维度来跟踪无线信号的定时。 另外,可以采用基于信号的不同维度的第二算法来验证定时并减少定时分析中的误差。 可以采用各种信号尺寸进行分析,包括循环前缀,频率,信道脉冲响应等,或其组合。 此外,无线信号的不同信道也可以通过第一算法和第二算法进行分析。 此外,可以选择第二算法以减少在第一算法中识别的缺陷,以改善总体时序分析,减少未检测到的定时误差或错误误差,并且改善定时校正。