公开(公告)号：EP2597907A4

公开(公告)日：2013-08-07

申请号：EP11786151

申请日：2011-06-07

申请人： HUAWEI TECH CO LTD

发明人： SUN GUOLIN ,  JAAP VAN DE BEEK

IPC分类号： H04W28/08 ,  H04L5/00 ,  H04L25/03 ,  H04L27/00 ,  H04W48/08 ,  H04W72/00

CPC分类号： H04B1/62 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/005 ,  H04L5/0092 ,  H04L25/03343 ,  H04L25/03898 ,  H04L25/08 ,  H04L27/0006 ,  H04L2025/03414 ,  H04W48/08

公开(公告)号：EP2128997A2

公开(公告)日：2009-12-02

申请号：EP08171771.2

申请日：2008-12-16

申请人： Fujitsu Limited

发明人： Yokoyama, Takashi ,  Hirai, Kouji ,  Ohkawa, Shigeru

IPC分类号： H04B1/62

CPC分类号： H04B1/62 ,  H03F1/3247 ,  H03F1/3294 ,  H03F2200/336 ,  H03F2200/393 ,  H03F2200/447 ,  H03F2200/465

摘要： A distortion compensating apparatus used in a wireless communication device such as a portable phone. An information measuring unit (11a) measures a distortion component and an electric power component based on a radiation signal. A compensation coefficient calculating unit (11b) calculates a compensation coefficient based on the distortion component and the electric power component. A signal transmitting unit (11c) outputs a signal corrected by the compensation coefficient as a transmission signal. A signal converting unit (13) converts the transmission signal into a high frequency signal. An amplitude separating unit (15) amplifies the high frequency signal and separates a portion thereof as a signal to be fed back. A feeding-back unit (14) processes the separated portion and outputs the result as a feedback signal to the information measuring unit (11a). An electric power information extracting unit (16) outputs a portion of the high frequency signal as the radiation signal, extracts electric power information from the radiation signal, and directly outputs the electric power information to the information measuring unit (11a).

摘要翻译： 在诸如便携式电话的无线通信设备中使用的失真补偿装置。 信息测量单元（11a）基于辐射信号测量失真分量和电功率分量。 补偿系数计算单元（11b）基于失真分量和电力分量来计算补偿系数。 信号发送单元（11c）将通过补偿系数校正的信号作为发送信号输出。 信号转换单元（13）将发送信号转换成高频信号。 振幅分离单元（15）放大高频信号并将其部分分离为要反馈的信号。 反馈单元（14）处理分离部分并将结果作为反馈信号输出到信息测量单元（11a）。 电力信息提取单元（16）输出高频信号的一部分作为辐射信号，从辐射信号中提取电力信息，并将电力信息直接输出到信息测量单元（11a）。

公开(公告)号：EP2093896A1

公开(公告)日：2009-08-26

申请号：EP07846049.0

申请日：2007-12-07

申请人： Huawei Technologies Co., Ltd.

发明人： FANG, Liming

IPC分类号： H04B3/32

CPC分类号： H04B3/32 ,  H04B1/62 ,  H04J1/12 ,  H04L2012/6478

摘要： A method for remote crosstalk cancellation, includes: the combination transmitting signal is performed a pre-coding of crosstalk cancellation in the manner of self-adapting filtering, the self-adapting changes of the values of filtering parameters are guided correctly with the influence of the crosstalk component in the received signals which is reflected indirectly by relevant values of the noise statistic reported by the receiver. A corresponding device and a signal processing system for remote crosstalk cancellation are provided. The self-adapting adjustment of the values of filtering parameters has a favourable astringency and an effect for crosstalk cancellation, avoiding the need to know the channel transmission matrix in advance, while absolutely avoiding the conflict to the existing transmission standard.

摘要翻译： 一种用于远程串扰消除的方法，包括：以自适应滤波的方式对组合发送信号进行串扰消除的预编码，过滤参数的值的自适应变化被正确地引导， 由接收机报告的噪声统计量的相关值间接反映的接收信号中的串扰分量。 提供了一种用于远程串扰消除的相应设备和信号处理系统。 过滤参数值的自适应调整具有良好的涩味和串扰消除的效果，避免了事先知道信道传输矩阵，同时绝对避免与现有传输标准的冲突。

公开(公告)号：EP1142104B1

公开(公告)日：2005-08-17

申请号：EP98965872.9

申请日：1998-12-24

申请人： Nokia Corporation

发明人： POSTI, Harri

IPC分类号： H03F1/32 ,  H04B1/62 ,  H04B1/04 ,  H04L5/06

CPC分类号： H04L27/368 ,  H03F1/3247 ,  H03F1/3282 ,  H03F2201/3206 ,  H03F2201/3233 ,  H04B1/04 ,  H04B1/62

摘要： A multi-frequency carrier transmitter (102) comprises input means for receiving a plurality of different digital signals to be transmitted. The different signals are to be transmitted on different carrier frequencies. Amplifier means (122) receive a composite signal comprising the different signals at the respective carrier frequencies and amplify the composite signal. Predistortion means (108) predistort the plurality of digital signals prior to amplification of the composite signal by the amplification means. The predistortion provided by the predistortion means is subsequently altered in dependence on the difference between the input signals and the output at the amplifier means.

公开(公告)号：EP1552620A1

公开(公告)日：2005-07-13

申请号：EP03808976.9

申请日：2003-09-30

申请人： Sony Ericsson Mobile Communications AB

发明人： CAMP, William, O., Jr.

IPC分类号： H04B1/62 ,  G01S5/02 ,  G01S1/04

CPC分类号： H04B1/70754 ,  G01S5/0221 ,  G01S5/14 ,  H04B1/62 ,  H04B2201/70715

摘要： Mobile terminal implementing a ranging signal receiver and method. Means are provided to incorporate ranging signal reception capability into a mobile terminal (such as a UMTS terminal) notwithstanding the fact that the ranging signal has a bandwidth that is wider than the bandpass of filtering for native signals within the terminal. A ranging signal receiving subsystem receives broadband signals that comprise synchronization bursts, which are equally spaced in time, such as from digital television stations. A common filter will have a bandpass that it is smaller than the bandwidth of the ranging signals. However, the correlation subsystem of the mobile terminal enables recovery of synchronization bursts by correlating the ranging signal with a known sequence that has been predistorted to account for the bandpass of the common filter.

公开(公告)号：EP1279238B1

公开(公告)日：2005-02-09

申请号：EP01922797.4

申请日：2001-03-28

申请人： INTERDIGITAL TECHNOLOGY CORPORATION

发明人： KAEWELL, John, D.

IPC分类号： H04B1/707

CPC分类号： H04L27/20 ,  H04B1/62 ,  H04B1/69 ,  H04B1/7097 ,  H04B1/711 ,  H04B2001/70724 ,  H04B2201/696 ,  H04B2201/709709 ,  H04L2027/0022

摘要： A digital spread spectrum communication system calculates phase and frequency error (119) on a received signal from a communicating entity during a wireless communication and pre-corrects a signal for phase and frequency error prior to transmission to that entity. Moreover, a carrier offset correction (149) is performed, either at a chip, or at a symbol level.

公开(公告)号：EP1109328B1

公开(公告)日：2004-02-25

申请号：EP99410173.1

申请日：1999-12-14

申请人： STMicroelectronics S.A. ,  STMicroelectronics N.V.

发明人： Nordström, Thomas ,  Bengtsson, Daniel ,  Isson, Olivier

IPC分类号： H04B3/32

CPC分类号： H04L25/03343 ,  H04B1/62 ,  H04B3/32 ,  H04L27/2601

公开(公告)号：EP1085668A3

公开(公告)日：2003-09-03

申请号：EP00307643.7

申请日：2000-09-04

申请人： LUCENT TECHNOLOGIES INC.

发明人： Johnson, Robert Everest ,  Leney, Mark Thomas ,  Vella-Coleiro, George Philip

IPC分类号： H04B1/62 ,  H03F1/32

CPC分类号： H04L27/368 ,  H04B1/62

摘要： This invention relates to a method and apparatus for reducing adjacent channel power in wireless communication systems. More particularly, the present invention is directed to a system for digitally and adaptively pre-distorting (in 112) a signal that includes applying a correction to the signal before it is applied to the input of an amplifier (16) such that the correction is equal and opposite to anticipated distortion produced by the amplifier. Thus, the correction and the amplifier distortion cancel one another resulting in a system with an overall linear transfer characteristic. In these circumstances, the adjacent channel power is desirably reduced.

公开(公告)号：EP0824810B1

公开(公告)日：2002-04-10

申请号：EP96913987.2

申请日：1996-05-08

申请人： UNISYS CORPORATION

发明人： GIALLORENZI, Thomas Robert ,  MATOLAK, David William ,  HARRIS, Johnny Michael ,  STEAGALL, Robert William ,  WILLIAMS, Bruce Howard

IPC分类号： H04J11/00 ,  H04B1/62

CPC分类号： H04B1/62 ,  H04B2201/70706 ,  H04J13/0003

摘要： An electronic data transmission system has a low peak-to-average power ratio by including a transmitter circuit which receives an input signal and in response generates a distorted output signal. This distorted output signal is generated by amplifying the input signal with one particular gain when the input signal is at a maximum magnitude which gives the distorted output signal a corresponding maximum magnitude, and by amplifying the input signal with a larger gain when the input signal is in a predetermined range below the maximum magnitude. The distorted output signal travels over a communication channel to a receiver circuit, which regenerates the input signal by amplifying the distorted output signal with a gain that is the inverse of the gain by which the distorted signal is generated.

公开(公告)号：EP1142104A1

公开(公告)日：2001-10-10

申请号：EP98965872.9

申请日：1998-12-24

申请人： Nokia Networks Oy

发明人： POSTI, Harri

IPC分类号： H03F1/32 ,  H04B1/62 ,  H04B1/04 ,  H04L5/06

CPC分类号： H04L27/368 ,  H03F1/3247 ,  H03F1/3282 ,  H03F2201/3206 ,  H03F2201/3233 ,  H04B1/04 ,  H04B1/62

摘要： A multi-frequency carrier transmitter (102) comprises input means for receiving a plurality of different digital signals to be transmitted. The different signals are to be transmitted on different carrier frequencies. Amplifier means (122) receive a composite signal comprising the different signals at the respective carrier frequencies and amplify the composite signal. Predistortion means (108) predistort the plurality of digital signals prior to amplification of the composite signal by the amplification means. The predistortion provided by the predistortion means is subsequently altered in dependence on the difference between the input signals and the output at the amplifier means.