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21.发明公开METHOD AND APPARATUS FOR COMMUNICATING WITH ROOT-NYQUIST, SELF-TRANSFORM PULSE SHAPES 有权方法和设备带根NYQUIST自变换的脉冲形状上通信
公开(公告)号：EP2162985A1
公开(公告)日：2010-03-17
申请号：EP08756224.5
申请日：2008-05-23
IPC分类号： H03K4/02
CPC分类号： H04L25/03834 , H04L25/03821 , H04L25/0384 , H04L25/03859 , H04L27/2626 , H04L27/2647
摘要： A communication system (20) comprises a transmitter (22) and a receiver (24). The transmitter (22) comprises a source of information symbols (30); a pulse shaping wave function generator (32); and a combiner (34) configured to express the information symbols received from the source as signals which are shaped in time and frequency domains by the wave function. The pulse shaping wave function generator (32) is configured to provide a wave function which has the Nyquist property and has a same shape as its own Fourier transform. The combiner (34) is configured to combine the wave function with a stream of digital data symbols to produce a filtered stream for transmission by the transmitter.
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公开(公告)号：EP1324624A4
公开(公告)日：2007-11-07
申请号：EP01983410
申请日：2001-07-30
申请人： HUAWEI TECH CO LTD
发明人： WANG JING , YU LIN , ZHANG QIANG , QIAN LAI
CPC分类号： H04L27/2092 , H04L25/03859 , H04L27/2075
摘要： The invention discloses three methods and apparatuses of 8psk modulation. First of them is that a product of a symbol vector and a coefficient of a shaped filter is stored in a table, and is compressed by 8 based on trigonometric function, using a form of table look-up instead of multiplicative operation. The second is that all states of 8psk modulation will be held in a data table after shaped filtering, and then the data of modulation states stored in the table is compressed and queried based on trigonometric function and level diversity. The final one is that a new modulated vector is stored in a modulated phase table, after simple 8psk modulation and phase rotation, and the modulated phase table is compressed by 4 by querying and data processing so as to obtain a new modulated vector. Then, using RAM coefficient filter makes the shaped filtering. The invention is adapted to a GSM system, and can provide a sufficient capability of data service and extend the lifecycle of a present GSM system adequately. Also, it can save cost and improve a competitive serve of service for operator.
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公开(公告)号：EP1333633B1
公开(公告)日：2007-02-21
申请号：EP03008489.1
申请日：1994-06-23
CPC分类号： H03G3/3089 , H03G3/3047 , H04L25/03859 , H04L27/2067 , H04L27/362
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公开(公告)号：EP1331778A3
公开(公告)日：2003-08-13
申请号：EP03008498.2
申请日：1994-06-23
IPC分类号： H04L25/03
CPC分类号： H03G3/3089 , H03G3/3047 , H04L25/03859 , H04L27/2067 , H04L27/362
摘要： A method of waveform shaping is provided, which is applicable to quadrature modulation waveforms and exploits rotational symmetry of the constellation. Implementation is by means of a look-up table.
摘要翻译： 提供了波形整形的方法，其适用于正交调制波形并利用星座的旋转对称性。 通过查找表来实现。
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公开(公告)号：EP1333633A1
公开(公告)日：2003-08-06
申请号：EP03008489.1
申请日：1994-06-23
CPC分类号： H03G3/3089 , H03G3/3047 , H04L25/03859 , H04L27/2067 , H04L27/362
摘要： A waveform shaping equipment generates and outputs signal waveforms corresponding to packets of dummy data previously and after outputting an ordinary sequence of signal waveforms of information data. The waveform shaping equipment comprises a main memory storing waveforms corresponding to the ordinary sequence, and a sub memory storing waveforms corresponding to a sequence of dummy data. A control means switches between readout of the main memory and the sub memory.
摘要翻译： 波形整形设备在输出信息数据的信号波形的普通序列之后，生成并输出与伪数据的分组相对应的信号波形。 波形整形设备包括存储对应于普通序列的波形的主存储器和存储对应于伪数据序列的波形的子存储器。 控制装置在主存储器和子存储器的读出之间切换。
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公开(公告)号：EP1324624A1
公开(公告)日：2003-07-02
申请号：EP01983410.0
申请日：2001-07-30
发明人： WANG, Jing Huawei Service Centre Building , YU, Lin Huawei Service Centre Building , ZHANG, Qiang Huawei Service Centre Building , QIAN, Lai Huawei Service Centre Building
IPC分类号： H04Q7/20
CPC分类号： H04L27/2092 , H04L25/03859 , H04L27/2075
摘要： 8PSK modulation methods and apparatuses are provided. In a first embodiment, product factors of symbol vectors and a coefficient of a shape filter are stored in a table and compressed by 8 times based on a law of a trigonometric function, wherein a method of table looking-up is used to replace a multiplication operation. In a second embodiment, all states of 8PSK modulation are stored in a table after shape filtering, and then the data of the states stored in the table are compressed based on a corresponding relationship of a law of a trigonometric function and an electrical level diversity, and then a table looking-up operation is performed. In a third embodiment, new modulated vectors are stored in a modulated phase table after simple 8PSK modulation and phase rotation, the modulated phase table is compressed by 4 times, and new modulated vectors are obtained by a table looking-up operation and data processing. Then, shape filtering is performed by utilizing a RAM coefficient filter. The 8PSK modulation methods and apparatuses are compatible with GSM systems and are capable of providing sufficient capability of data services and sufficiently extending a life cycle of prior GSM systems. It allows a service agent not only to save investment, but also to provide competitive services.
摘要翻译： 提供了8PSK调制方法和装置。 在第一实施例中，符号向量的乘积因子和形状滤波器的系数被存储在表中，并且基于三角函数的定律被压缩8倍，其中使用表查找的方法来代替乘法 操作。 在第二实施例中，在形状滤波之后将8PSK调制的所有状态存储在表中，然后基于三角函数定律和电位分集的对应关系来压缩存储在表中的状态的数据， 然后执行表查找操作。 在第三实施例中，在简单的8PSK调制和相位旋转之后，将新的调制矢量存储在调制相位表中，将调制相位表压缩4倍，并通过表查找操作和数据处理获得新的调制矢量。 然后，利用RAM系数滤波器进行形状滤波。 8PSK调制方法和装置与GSM系统兼容，并且能够提供足够的数据服务能力并充分延长先前GSM系统的生命周期。 它允许服务代理商不仅节省投资，而且还提供有竞争力的服务。
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27.发明公开Method and apparatus for waveform shaping of packet data 失效Verfahren und Einrichtung zur Signalformung von Paketdaten
公开(公告)号：EP0631398A3
公开(公告)日：2000-03-08
申请号：EP94109760.2
申请日：1994-06-23
CPC分类号： H03G3/3089 , H03G3/3047 , H04L25/03859 , H04L27/2067 , H04L27/362
摘要： In the transmitter which carries out burst transmission using information data as a packet, if the status is divided into four modes, namely, burst stop mode, burst rising mode, burst continuous mode, and burst falling mode, a waveform shaping equipment designed to read out shaped waveform data for each mode from outputs of either of the two memory tables, the first memory table which holds waveform data for specific data patterns used in common in burst rising mode and burst falling mode and the second memory table which holds waveform data for all data patterns used in the burst continuous mode, or a waveform shaping equipment comprising the third memory table which holds waveform data corresponding to all the data patterns used in the burst rising mode and the fourth memory table which holds waveform data corresponding to all data patterns used in the burst falling mode and generating shaped waveform data by synthesizing the two outputs of the third and the fourth memory tables at the time of burst continuous mode.
摘要翻译： 提供了一种波形整形方法，适用于正交调制波形并利用星座的旋转对称性。 实现是通过查找表。
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28.发明公开Method and apparatus for waveform shaping of packet data 失效Verfahren und Einrichtung zur Signalformung von Paketdaten。
公开(公告)号：EP0631398A2
公开(公告)日：1994-12-28
申请号：EP94109760.2
申请日：1994-06-23
IPC分类号： H04B7/005
CPC分类号： H03G3/3089 , H03G3/3047 , H04L25/03859 , H04L27/2067 , H04L27/362
摘要： In the transmitter which carries out burst transmission using information data as a packet, if the status is divided into four modes, namely, burst stop mode, burst rising mode, burst continuous mode, and burst falling mode,
a waveform shaping equipment designed to read out shaped waveform data for each mode from outputs of either of the two memory tables, the first memory table which holds waveform data for specific data patterns used in common in burst rising mode and burst falling mode and the second memory table which holds waveform data for all data patterns used in the burst continuous mode, or a waveform shaping equipment comprising the third memory table which holds waveform data corresponding to all the data patterns used in the burst rising mode and the fourth memory table which holds waveform data corresponding to all data patterns used in the burst falling mode and generating shaped waveform data by synthesizing the two outputs of the third and the fourth memory tables at the time of burst continuous mode.摘要翻译： 在使用信息数据作为分组执行突发传输的发送机中，如果状态被分为四种模式，即突发停止模式，突发上升模式，突发连续模式和突发下降模式，则设计为读取的波形整形设备 从两个存储器表中的任一个的输出中输出每个模式的形状波形数据，第一存储表保存用于突发上升模式和突发下降模式中共同使用的特定数据模式的波形数据，以及第二存储表，其保存用于 在突发连续模式中使用的所有数据模式，或波形整形设备，其包括保存与突发上升模式中使用的所有数据模式相对应的波形数据的第三存储器表，以及保存对应于所有数据模式的波形数据的第四存储器表 用于突发下降模式，并通过在t处合成第三和第四存储器表的两个输出来产生形状波形数据 他连续时间连续模式。
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公开(公告)号：EP0345282A4
公开(公告)日：1992-01-15
申请号：EP88901685
申请日：1988-01-11
申请人： MOTOROLA, INC.
CPC分类号： H04L27/3494 , H04L23/02 , H04L25/03859 , H04L27/363 , H04L27/3854
摘要： Method and apparatus for generating a uniquely shaped prototype digital pulse which is transmitted with minimal frequency spectrum consumption and yet a relatively high bit rate. Such uniquely shaped digital pulse is stored in a memory (135) included in a transmitter (100) until transmission is desired, at which time a positive of the pulse is transmitted to correspond to a first logic level or the negative of the pulse is transmitted to correspond to a second logic level.
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