OFDM BASED ORBITAL ANGULAR MOMENTUM SYSTEM AND METHOD
    3.
    发明申请
    OFDM BASED ORBITAL ANGULAR MOMENTUM SYSTEM AND METHOD 审中-公开
    基于OFDM的ORBITAL ANGULAR MOMENTUM系统和方法

    公开(公告)号:WO2015189653A1

    公开(公告)日:2015-12-17

    申请号:PCT/IB2014/002103

    申请日:2014-06-10

    Applicant: EUTELSAT S A

    Abstract: Disclosed herein is a radio communications method that comprises carrying out, by a transmitter (7), the following steps: providing a digital time signal carrying digital symbols to be transmitted; and transmitting a radio frequency signal carrying said digital time signal. The method further comprises carrying out, by a receiver (8), the following steps: receiving the radio frequency signal transmitted by the transmitter (7); processing the received radio frequency signal so as to obtain a corresponding incoming digital signal; and extracting, from the incoming digital signal, the digital symbols carried by said incoming digital signal. Said digital time signal carrying the digital symbols to be transmitted results from an approximation of the Hilbert transform in frequency domain, which approximation is based on a frequency main mode and one or more frequency twisted modes, wherein said frequency main and twisted modes carry, each, respective digital symbols to be transmitted. The transmitted signal is produced by a bank of IFFT each devoted to one mode and consists in overlapped OFDM modes with growing bandwidths per modes.

    Abstract translation: 这里公开了一种无线电通信方法,其包括由发射机(7)执行以下步骤:提供携带要传输的数字符号的数字时间信号; 以及发送携带所述数字时间信号的射频信号。 该方法还包括由接收机(8)执行以下步骤:接收由发射机(7)发射的射频信号; 处理所接收的射频信号以获得相应的输入数字信号; 以及从所述输入数字信号中提取由所述输入数字信号携带的数字符号。 携带要传输的数字符号的所述数字时间信号是从频域中的希尔伯特变换的近似得出的,其近似是基于频率主模式和一个或多个频率扭曲模式,其中所述频率主模式和扭转模式各自携带 ,要发送的各个数字符号。 所发送的信号由IFFT组产生,每个IFFT分组用于一种模式,并且包括每个模式具有不断增长的带宽的重叠OFDM模式。

    TRANSMITTING APPARATUS, RECEIVING APPARATUS, AND CONTROL METHODS THEREOF
    4.
    发明申请
    TRANSMITTING APPARATUS, RECEIVING APPARATUS, AND CONTROL METHODS THEREOF 审中-公开
    发送装置,接收装置及其控制方法

    公开(公告)号:WO2015122668A1

    公开(公告)日:2015-08-20

    申请号:PCT/KR2015/001311

    申请日:2015-02-10

    Abstract: A transmitting apparatus is disclosed. The transmitting apparatus includes a preamble symbol inserter configured to insert to a frame a preamble symbol including a signaling information, a guard interval inserter configured to insert guard intervals to both ends of the preamble symbol, and a transmitter configured to transmit a frame including the preamble symbol and the guard intervals, wherein one of the guard intervals which are inserted to both ends of the preamble symbol comprises a pseudo random noise (PN) sequence and another guard interval includes one between the PN sequence and a part of the signaling information. Accordingly, no separate algorithm to estimate size of FFT of the preamble symbol and the guard interval is necessary, robust signal detection and synchronization is enabled by the PN sequence inserted to the guard interval, and compensation of interference which is generated under multipath channel environment deems to be easier.

    Abstract translation: 公开了发送装置。 发送装置包括:前置码符号插入器,被配置为向帧插入包括信令信息的前导符号,被配置为向前导码符号的两端插入保护间隔的保护间隔插入器,以及发送器,被配置为发送包括前导码的帧 符号和保护间隔,其中插入到前导符号的两端的保护间隔之一包括伪随机噪声(PN)序列,另一个保护间隔包括PN序列与信令信息的一部分之间的一个。 因此,不需要单独的算法来估计前导码符号和保护间隔的FFT的大小,通过插入到保护间隔的PN序列来实现鲁棒的信号检测和同步,并且在多径信道环境下产生的干扰的补偿认为是 更容易

    TRANSMITTER AND METHOD OF TRANSMITTING PAYLOAD DATA, RECEIVER AND METHOD OF RECEIVING PAYLOAD DATA IN AN OFDM SYSTEM
    6.
    发明申请
    TRANSMITTER AND METHOD OF TRANSMITTING PAYLOAD DATA, RECEIVER AND METHOD OF RECEIVING PAYLOAD DATA IN AN OFDM SYSTEM 审中-公开
    在OFDM系统中传输载荷数据的发送机和方法,接收机和接收载荷数据的方法

    公开(公告)号:WO2014155104A1

    公开(公告)日:2014-10-02

    申请号:PCT/GB2014/050954

    申请日:2014-03-26

    Abstract: A transmitter transmits payload data using Orthogonal Frequency Division Multiplexed (OFDM) symbols. The transmitter comprises a frame builder configured to receive the payload data to be transmitted and to receive first signalling data for use in detecting and recovering the payload data at a receiver, and to form the payload data and the first signalling data into frames for transmission, the first signalling data forming a part of the frames with the payload data. A modulator is configured to modulate a first OFDM symbol with the first signalling data and to modulate one or more second OFDM symbols with the payload data. A signature sequence processor provides a signature sequence, a combiner combines the signature sequence with the first OFDM symbol, and a transmission unit transmits the first and second OFDM symbols. The signature sequence provided by the signature sequence processor comprises at least one of a first synchronisation sequence or a second message sequence, the first synchronisation sequence and/or the second message sequence being combined by the combiner with the first OFMD symbol. The first synclironisation sequence is provided for a receiver to detect and to recover the first signalling data from the first OFDM symbol and the second message sequence provides message information to the receiver. The message information may be used to convey a specific message to a user such as an emergency warning relating to a natural disaster such as an earthquake or a tsunami warning.

    Abstract translation: 发射机使用正交频分复用(OFDM)符号发射有效载荷数据。 发射机包括:帧构造器,被配置为接收要发送的有效载荷数据,并且接收第一信令数据以用于在接收机处检测和恢复有效载荷数据,并且将有效载荷数据和第一信令数据形成帧以进行传输, 所述第一信令数据形成具有有效载荷数据的帧的一部分。 调制器被配置为用第一信令数据调制第一OFDM符号并且利用有效载荷数据来调制一个或多个第二OFDM符号。 签名序列处理器提供签名序列,组合器将签名序列与第一OFDM符号组合,传输单元发送第一和第二OFDM符号。 由签名序列处理器提供的签名序列包括第一同步序列或第二消息序列中的至少一个,第一同步序列和/或第二消息序列由组合器与第一OFMD符号组合。 为接收机提供第一同步序列以检测并恢复来自第一OFDM符号的第一信令数据,并且第二消息序列向接收机提供消息信息。 消息信息可以用于向用户传达特定消息,例如与诸如地震或海啸警报的自然灾害相关的紧急警告。

    通信システム、通信装置および通信方法
    8.
    发明申请
    通信システム、通信装置および通信方法 审中-公开
    通信系统,通信设备和通信方法

    公开(公告)号:WO2014027667A1

    公开(公告)日:2014-02-20

    申请号:PCT/JP2013/071894

    申请日:2013-08-13

    Abstract:  第1の通信装置と、第2の通信装置とを具備する無線通信システムであって、第1の通信装置は、第2の通信装置に送信するデータ信号が配置されているサブキャリアを少なくとも1つ含む2つのサブキャリアであって、所定の周波数間隔を有する2つのサブキャリアの信号に相関を与える周期定常性付与部を具備し、第2の通信装置は、第1の通信装置が他の装置に通知すべき情報に応じて、所定の周波数間隔を決定する周波数間隔決定部を具備することで、周期定常性を付与する際のフレーム効率の低下を抑制することができる通信システムを提供する。

    Abstract translation: 提供了一种配备有第一通信设备和第二通信设备的无线通信系统,其中第一通信设备配备有用于对具有预定频率间隔的两个子载波的信号进行相关性的周期平稳单元,并且包括至少一个子载波 分配了发送到第二通信设备的数据信号,并且第二通信设备配备有频率间隔设置单元,用于根据要由第一通信设备传送到另一设备的信息来设置预定频率间隔, 从而可以降低循环稳定期间的帧效率的降低。

    OFDM SIGNAL TO NOISE RATIO DETECTOR AND METHOD
    9.
    发明申请
    OFDM SIGNAL TO NOISE RATIO DETECTOR AND METHOD 审中-公开
    OFDM信号到噪声比检测器和方法

    公开(公告)号:WO2013153382A1

    公开(公告)日:2013-10-17

    申请号:PCT/GB2013/050921

    申请日:2013-04-10

    CPC classification number: H04L27/2647 H04L27/2678 H04L27/2691

    Abstract: The present invention relates to a method and apparatus for estimating the signal to noise ratio of a broadcast OFDM signal. The invention compares signals of the data in a guard interval and the corresponding part of the data frame of an OFDM symbol. A sum and difference operation is then performed on the data in the compared signals to enable a Signal to Noise Ratio to be calculated.

    Abstract translation: 本发明涉及一种用于估计广播OFDM信号的信噪比的方法和装置。 本发明将保护间隔中的数据和OFDM符号的数据帧的对应部分的信号进行比较。 然后对比较的信号中的数据执行和差和差分操作,以便计算信噪比。

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