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36 条记录 (耗时 0.019 秒)

    METHODS AND APPARATUS FOR FASTER THAN NYQUIST RATE MULTI-CARRIER MODULATION
    22.
    发明公开
    METHODS AND APPARATUS FOR FASTER THAN NYQUIST RATE MULTI-CARRIER MODULATION 审中-公开
    方法和设备快速ALS尼奎斯特速率更多载波调制

    公开(公告)号：EP3039836A1

    公开(公告)日：2016-07-06

    申请号：EP14759377.6

    申请日：2014-08-15

    申请人： Interdigital Patent Holdings, Inc.

    发明人： BALA, Erdem ,  YANG, Rui ,  LI, Jialing

    IPC分类号： H04L27/26 ,  H04L5/00

    CPC分类号： H04L5/0007 ,  H04J11/0023 ,  H04L5/0044 ,  H04L5/0062 ,  H04L27/264 ,  H04L27/2644

    摘要： The disclosure pertains to methods and apparatus for Faster than Nyquist (FTN) modulation schemes to increase throughput in multicarrier communication systems and wherein the latency problem inherent in filter bank multicarrier systems (FBMC) is reduced or eliminated by using non-orthogonal waveforms (i.e., faster than Nyquist modulation) in only part(s) of the subframe or packet and orthogonal waveforms in other part(s). The number and spacing between FTN pulses may be selected such that the last sample of the last pulse is received within the time slot allocated to the subframe/ packet, thereby eliminating added latency. The FTN modulation scheme may be employed both temporally and in frequency (e.g., the frequency spacing of the channels may be tighter than the Nyquist frequency spacing condition. FTN signaling also may be used as a method to control/coordinate interference between different nodes. For instance, if a node uses FTN, more pulses may be packed into a given period in the time domain and/or more channels may be packed into a given bandwidth in the frequency domain, hence some parts of the band may be vacated for use by others, use by the same node for additional channels, or used with reduced power. The interference control/coordination may be extended to time and frequency. Such FTN schemes may be used with different types of multicarrier systems.

    EFFICIENT EMPLOYMENT OF DIGITAL UPSAMPLING USING IFFT IN OFDM SYSTEMS FOR SIMPLER ANALOG FILTERING
    26.
    发明公开
    EFFICIENT EMPLOYMENT OF DIGITAL UPSAMPLING USING IFFT IN OFDM SYSTEMS FOR SIMPLER ANALOG FILTERING 审中-公开
    有效地使用数字采样的通过IFFT OFDM系统中更容易的模拟滤波

    公开(公告)号：EP1856875A1

    公开(公告)日：2007-11-21

    申请号：EP06738056.8

    申请日：2006-03-10

    申请人： QUALCOMM Flarion Technologies, Inc.

    发明人： KRISHNAMOORTHI, Raghuraman ,  LING, Fuyun ,  VIJAYAN, Rajiv

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2644

    摘要： Systems and methods are provided for transmitting OFDM information via IFFT up-sampling components that transmit data at a higher sampling rate than conventional systems to simplify filter requirements and mitigate leakage between symbols. In one embodiment, an NL point IFFT is performed on a zero inserted set of frequency domain symbols. Ih another embodiment, the NL point IFFT is further optimized by exploiting the fact that (N-I) L of the frequency domain symbols are zero. This enables an embodiment that consists of a pre-processor that multiplies the input samples by complex phase factors, followed by L point IFFTs.

    VERFAHREN ZUM SENDEN VON FUNKSIGNALEN UND SENDER ZUM VERSENDEN VON FUNKSIGNALEN
    27.
    发明公开
    VERFAHREN ZUM SENDEN VON FUNKSIGNALEN UND SENDER ZUM VERSENDEN VON FUNKSIGNALEN 审中-公开
    程序发送无线电信号，并且站船舶无线电信号

    公开(公告)号：EP1222786A2

    公开(公告)日：2002-07-17

    申请号：EP00972571.4

    申请日：2000-09-02

    申请人： ROBERT BOSCH GMBH

    发明人： SCHRADER, Marc ,  HENTATI, Nabil

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2644 ,  H04L27/2614

    摘要： The invention relates to a method for transmitting radio signals and to a transmitter for transmitting radio signals which serve for operating an amplifier of the transmitter (8) in an optimum manner in the linear area thereof. Signals are transmitted in the orthogonal frequency multiplex (OFDM). The amplitudes which pertain to the OFDM signals and exceed a predetermined threshold are eliminated by means of an additive correction signal. The phase of the OFDM signals is impressed onto the additive correction signal. Moreover, a correction signal is generated and removed from the OFDM signals until no more amplitudes of the OFDM signals exceed the predetermined threshold. Gaussian pulses are used as correction signals by virtue of the simple handling thereof. Oversampling of the OFDM signals is used for determining the amplitudes values of the OFDM signals.

    TRANSMISSION DEVICE, RECEPTION DEVICE, AND COMMUNICATION SYSTEM
    28.
    发明公开
    TRANSMISSION DEVICE, RECEPTION DEVICE, AND COMMUNICATION SYSTEM 审中-公开
    传输设备，接收设备和通信系统

    公开(公告)号：EP3065319A1

    公开(公告)日：2016-09-07

    申请号：EP14857632.5

    申请日：2014-04-30

    申请人： Mitsubishi Electric Corporation

    发明人： HASEGAWA, Fumihiro

    IPC分类号： H04J11/00

    CPC分类号： H04W16/14 ,  H04J11/00 ,  H04L27/2636 ,  H04L27/2644 ,  H04W72/082

    摘要： Included are a data-symbol generation unit 1 that generates data symbols for one block in each block; a storage and processing unit 3 that stores therein a data symbol at a first position, among the data symbols for one block, as a copied symbol; a symbol insertion unit 2 that generates a block symbol by putting the data symbols and the copied symbol such that the copied symbol stored in the storage and processing unit 3 are inserted at a second position of the data symbols for one block; a time/frequency conversion unit 5 that converts the block signal into a frequency domain signal; an interpolation unit 8 that performs interpolation processing on the frequency domain symbol; and a CP insertion unit 9 that generates the block signal by inserting a Cyclic Prefix into a signal on which the interpolation processing has been performed.

    摘要翻译： 包括生成每个块中的一个块的数据符号的数据符号生成单元1; 存储和处理单元3，其将用于一个块的数据符号中的第一位置处的数据符号存储为复制符号; 符号插入单元2，其通过放置数据符号和复制的符号来产生块符号，使得存储在存储和处理单元3中的复制符号被插入到一个块的数据符号的第二位置处; 时间/频率转换单元5，将块信号转换为频域信号; 插值单元8，其对频域码元执行插值处理; 以及CP插入单元9，其通过将循环前缀插入到已经执行了插值处理的信号中来生成块信号。

    PROCÉDÉ ET DISPOSITIF DE TRANSMISSION DE BLOCS DE SYMBOLES DE DONNÉES COMPLEXES, PROCÉDÉ ET DISPOSITIF DE RÉCEPTION ET PROGRAMMES D'ORDINATEUR CORRESPONDANTS
    29.
    发明公开
    PROCÉDÉ ET DISPOSITIF DE TRANSMISSION DE BLOCS DE SYMBOLES DE DONNÉES COMPLEXES, PROCÉDÉ ET DISPOSITIF DE RÉCEPTION ET PROGRAMMES D'ORDINATEUR CORRESPONDANTS 有权
    方法和设备转让的复数数据符号块，接收方法和装置及相关的计算机程序

    公开(公告)号：EP3042480A1

    公开(公告)日：2016-07-13

    申请号：EP14777686.8

    申请日：2014-09-02

    申请人： Orange

    发明人： LIN, Hao ,  SIOHAN, Pierre

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2644 ,  H04L5/0044 ,  H04L27/2607 ,  H04L27/2627 ,  H04L27/264 ,  H04L27/2649

    摘要： The invention relates to a method for the transmission of complex data symbols, supplying a multiple carrier signal. According to the invention, such a method comprises a step of forming at least one block of MxK complex data symbols, where M > 1 and K > 1, implementing the following steps: for at least one column of said block, conversion (21) of the M complex data symbols of said column of the frequency domain to the time domain, supplying N converted symbols; cyclic repetition (22) of said N converted symbols, supplying NK repeated symbols; cyclic repetition (22) of said transformed N symbols, supplying NK repeated symbols; filtration (23) said NK repeated symbols via a forming filter, supplying NK filtered symbols; and summation (24) of said obtained filtered symbols for the various columns of said block, supplying NK temporal samples.

    摘要翻译： 提供了一种用于发射复数据符号，供给多载波信号的方法。 该方法包括：成形M×K个复数数据符号中的至少一个块，其中M> 1和K> 1，实施以下动作：所述块中的至少一个列中，从列的M个复数数据符号转换 频域到时域，N供应转换后的符号; 所述N个的循环重复转换符号，供给NK重复的符号; 所述转化的N个符号的循环重复，供应NK重复的符号; 通过整形滤波器过滤所述NK重复的符号，供应NK过滤符号; 和所述块的各列，供应NK时间样本所获得的过滤的符号的总和。