公开(公告)号：WO01082541A2

公开(公告)日：2001-11-01

申请号：PCT/GB2001/001873

申请日：2001-04-27

IPC: H04L25/03 ,  H04L27/00

CPC classification number: H04L25/03859

Abstract: Waveform generator (40) is capable of generating an arbitrary waveform in quadrature format. Each of the I and Q components of the waveform is generated by addressing data in a plurality of non-volatile storage blocks (e.g. A-F for the I component) and demultiplexing (via unit 44 for the I channel) the retrieved data into a sequence forming the component which can then be combined with the other component in the analogue domain to produce the desired waveform.

Abstract translation: 波形发生器（40）能够产生正交格式的任意波形。 波形的I和Q分量中的每一个通过在多个非易失性存储块（例如，I分量的AF）中寻址数据并且将检索的数据解复用（通过I通道的单元44）生成为序列形成 该组件然后可以与模拟域中的另一个组件组合以产生所需的波形。

公开(公告)号：WO02028126A1

公开(公告)日：2002-04-04

申请号：PCT/CN2001/001213

申请日：2001-07-30

IPC: H04L25/03 ,  H04L27/20 ,  H04Q7/20

CPC classification number: H04L27/2092 ,  H04L25/03859 ,  H04L27/2075

Abstract: 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.

公开(公告)号：WO0182541A3

公开(公告)日：2002-04-18

申请号：PCT/GB0101873

申请日：2001-04-27

Applicant: IFR LTD ,  ARMSTRONG ROBERT WILLIAM ,  OWEN DAVID PAUL ,  THOMAS NEIL EDWIN ,  HAIGH JAMES EDWARD

Inventor： ARMSTRONG ROBERT WILLIAM ,  OWEN DAVID PAUL ,  THOMAS NEIL EDWIN ,  HAIGH JAMES EDWARD

IPC: H04L25/03

CPC classification number: H04L25/03859

Abstract: Waveform generator (40) is capable of generating an arbitrary waveform in quadrature format. Each of the I and Q components of the waveform is generated by addressing data in a plurality of non-volatile storage blocks (e.g. A-F for the I component) and demultiplexing (via unit 44 for the I channel) the retrieved data into a sequence forming the component which can then be combined with the other component in the analogue domain to produce the desired waveform.

Abstract translation: 波形发生器（40）能够产生正交格式的任意波形。 波形的I和Q分量中的每一个通过在多个非易失性存储块（例如，I分量的AF）中寻址数据并且将检索的数据解复用（通过I通道的单元44）生成为序列形成 该组件然后可以与模拟域中的另一个组件组合以产生所需的波形。

公开(公告)号：WO2015144372A1

公开(公告)日：2015-10-01

申请号：PCT/EP2015/053730

申请日：2015-02-23

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： TAN, Jun ,  YANG, Weidong ,  RATASUK, Rapeepat

IPC: H04L25/03 ,  H04L27/20

CPC classification number: H04L25/03834 ,  H04B7/0478 ,  H04B7/0617 ,  H04B7/0669 ,  H04L25/03178 ,  H04L25/0384 ,  H04L25/03859 ,  H04L27/2003 ,  H04L27/2615 ,  H04L27/3411 ,  H04L27/3444

Abstract: A method includes receiving a two-bit information stream comprising first and second bits and performing precoding using the two-bit information stream to determine multiple output signals. The precoding is performed to create a finite multiple of states for the output signals. The output signals comprise a first output signal based on a version of the first input bit and on a version of a second input bit, a second output signal based on a delayed version of the first input bit and the version of the second input bit, and a third output signal based on the version of first input bit and a delayed version of the second input bit. The method includes performing pulse shaping of each of the output signals to create pulse-shaped signals, combining the pulse-shaped signals to create a transmission waveform, and outputting the transmission waveform. Apparatus, computer programs, and computer program products are disclosed.

Abstract translation: 一种方法包括接收包括第一和第二比特的两比特信息流，并使用两比特信息流执行预编码以确定多个输出信号。 执行预编码以产生用于输出信号的有限数量的状态。 输出信号包括基于第一输入位的版本和第二输入位的版本的第一输出信号，基于第一输入位的延迟版本和第二输入位的版本的第二输出信号， 以及基于第一输入位的版本和第二输入位的延迟版本的第三输出信号。 该方法包括对每个输出信号进行脉冲整形以产生脉冲信号，组合脉冲信号以产生发送波形，并输出发送波形。 公开了装置，计算机程序和计算机程序产品。

公开(公告)号：WO2016060750A1

公开(公告)日：2016-04-21

申请号：PCT/US2015/048577

申请日：2015-09-04

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： YAMAN, Fatih ,  ZHANG, Shaoliang ,  HUANG, Yue-Kai

IPC: H04L25/03 ,  H04L25/49 ,  H04B10/80

CPC classification number: H04L25/03859 ,  H04B10/2507 ,  H04B10/58 ,  H04B10/616 ,  H04L25/03171 ,  H04L25/03343

Abstract: A system for optimizing signal quality in an optical communication system is provided including a transmitter (100) for converting digital signals to optical signals, the transmitter (100) including a transmitter digital signal processing chip (103) including a predistortion logic (105) and a transmitter look-up table (LUT) (108). A receiver (200) is operatively coupled to the transmitter (100) for receiving and converting the optical signals from the transmitter (100) to digital signals (117). The receiver (200) includes a receiver digital signal processing chip (213) including a correction logic (211) and a receiver look-up table (LUT) (208). The transmitter LUT (108) is constructed by scaling the receiver LUT (208) by a weight factor and is iteratively updated based on a weighted sum of the receiver LUT (208).

Abstract translation: 提供了一种用于优化光通信系统中的信号质量的系统，包括用于将数字信号转换为光信号的发射机（100），所述发射机（100）包括发射机数字信号处理芯片（103），包括预失真逻辑（105）和 发射机查找表（LUT）（108）。 接收器（200）可操作地耦合到发射器（100），用于接收并将来自发射器（100）的光信号转换成数字信号（117）。 接收器（200）包括包括校正逻辑（211）和接收机查找表（LUT）（208）的接收机数字信号处理芯片（213）。 发送器LUT（108）通过对接收器LUT（208）进行加权因子的缩放而被构造，并且基于接收器LUT（208）的加权和迭代地更新。

公开(公告)号：WO2008148024A1

公开(公告)日：2008-12-04

申请号：PCT/US2008/064743

申请日：2008-05-23

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  DENT, Paul, Wilkinson

Inventor： DENT, Paul, Wilkinson

IPC: H03K4/02

CPC classification number: H04L25/03834 ,  H04L25/03821 ,  H04L25/0384 ,  H04L25/03859 ,  H04L27/2626 ,  H04L27/2647

Abstract: 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.

Abstract translation: 通信系统（20）包括发射机（22）和接收机（24）。 发射机（22）包括信息符号源（30）; 脉冲整形波函数发生器（32）; 以及组合器（34），被配置为将从源接收的信息符号表示为通过波函数在时域和频域中成形的信号。 脉冲整形波函数发生器（32）被配置为提供具有奈奎斯特性质并且具有与其自身傅立叶变换相同形状的波函数。 组合器（34）被配置为将波函数与数字数据符号流组合以产生用于发射机传输的滤波流。

公开(公告)号：WO1988005983A1

公开(公告)日：1988-08-11

申请号：PCT/US1988000129

申请日：1988-01-11

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  STEEL, Francis, Robert ,  LEITCH, Clifford, Dana ,  SUAREZ, Jose, Ignacio

IPC: H04L27/20

CPC classification number: H04L27/3494 ,  H04L23/02 ,  H04L25/03859 ,  H04L27/363 ,  H04L27/3854

Abstract: 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.

Abstract translation: 用于产生唯一形状的原型数字脉冲的方法和装置，其以最小频谱消耗并且具有相对较高的比特率被传输。 这种唯一形状的数字脉冲被存储在包括在发射机（100）中的存储器（135）中，直到需要传输，此时发送脉冲的正值以对应于第一逻辑电平或传输脉冲的负值 以对应于第二逻辑电平。