公开(公告)号：EP3395108A1

公开(公告)日：2018-10-31

申请号：EP17747019.2

申请日：2017-02-06

Applicant: MediaTek Inc.

Inventor： YANG, Weidong ,  LI, Chien-Chang ,  CHEN, Bo-Si

IPC: H04W72/04

CPC classification number: H04L27/262 ,  H04B7/0639 ,  H04B2201/70706 ,  H04J11/00 ,  H04J2011/0013 ,  H04J2211/008 ,  H04L5/0041 ,  H04L5/0092 ,  H04L27/2614 ,  H04W16/14 ,  H04W72/0413 ,  H04W72/0453

Abstract: A method of uplink transmission to reduce peak-to-average power ratio (PAPR) in enhanced licensed assisted access (eLAA) is proposed. New design of Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH) is proposed. Across frequency domain of the channel bandwidth, multiple resource interlaces are allocated for different UEs for uplink PUCCH/PUSCH transmission to satisfy the occupied channel bandwidth requirement for unlicensed carrier access. In addition, uplink transmission with co-phasing terms are applied to reduce PAPR of the resulted waveform.

公开(公告)号：EP2278727B1

公开(公告)日：2018-09-26

申请号：EP10182862.2

申请日：1998-05-13

Applicant: Qualcomm Incorporated

Inventor： Odenwalder, Joseph P.

IPC: H04B1/707 ,  H04L1/00 ,  H04L1/08 ,  H04W52/04

CPC classification number: H04L1/0057 ,  H04B1/707 ,  H04B2201/70706 ,  H04L1/0071 ,  H04L1/08 ,  H04W52/04

Abstract: The invention relates to a method and a transmitter apparatus for a variable data rate signal. The invention provides an interleaver configured to interleave a frame of code symbols to produce a sequence of interleaved symbols having a first predetermined number of symbols. A repeater is configured to repeat the sequence of interleaved symbols a number of times and to repeat a subset of the sequence of interleaved symbols, wherein the subset has a second predetermined number of symbols, and wherein the second predetermined number of symbols is less than the first predetermined number of symbols.

公开(公告)号：EP2541817A4

公开(公告)日：2017-07-12

申请号：EP10846618

申请日：2010-11-19

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： MAEHATA TAKASHI ,  ILLARIONOV MIKHAIL

IPC: H04J11/00 ,  H04B1/707

CPC classification number: H04J11/0023 ,  H04B1/707 ,  H04B2201/70706 ,  H04L27/2624

Abstract: An object of the present invention is to appropriately limit an amplitude of an IQ baseband signal having different average powers for respective frequency bands B1 and B2, without degrading an SNR. The present invention relates to a signal processing circuit 9 for reducing a PAPR of a modulated wave signal to be inputted to a power amplification circuit 5. The signal processing circuit 9 includes a power calculation section 13 that calculates an instantaneous power P of an IQ baseband signal of the modulated wave signal, and a signal processing section 17 that limits an amplitude of the IQ baseband signal by performing a clipping process or the like, by using cancellation signals Ic and Qc capable of canceling the IQ baseband signal in accordance with average powers of the respective frequency bands B1 and B2, such that an upper limit of an instantaneous power P becomes equivalent to a predetermined threshold Pth.

Abstract translation: 本发明的目的在于，在不降低SNR的情况下，针对各个频带B1，B2适当地限制平均功率不同的IQ基带信号的振幅。 信号处理电路9本发明涉及一种信号处理电路9，用于减小要输入到功率放大电路5的调制波信号的PAPR。信号处理电路9包括功率计算部分13，其计算IQ基带的瞬时功率P 调制波信号的信号，以及信号处理部17，其通过使用能够根据平均功率消除IQ基带信号的消除信号Ic和Qc，通过执行限幅处理等来限制IQ基带信号的幅度 使各瞬时功率P的上限值与规定的阈值Pth相当。

公开(公告)号：EP1592157B1

公开(公告)日：2016-06-29

申请号：EP05252370.1

申请日：2005-04-15

Applicant: ALCATEL LUCENT

Inventor： Ashikhmin, Alexei ,  Liu, Jung-Tao

IPC: H04J11/00

CPC classification number: H04J13/00 ,  H04B2201/70706 ,  H04J13/10

公开(公告)号：EP2748998A4

公开(公告)日：2015-10-07

申请号：EP12869371

申请日：2012-02-22

Applicant: ERICSSON TELEFON AB L M

Inventor： HUANG TAO ,  YANG CHANGJIANG ,  ZENG XIANG

IPC: H04L27/26 ,  H03F1/02 ,  H03F1/32 ,  H03F3/19 ,  H03F3/24 ,  H04L27/36

CPC classification number: H03F3/19 ,  H03F1/02 ,  H03F1/3247 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3215 ,  H03F2201/3227 ,  H04B2201/70706 ,  H04L27/2623 ,  H04L27/368

Abstract: A method for controlling an input signal of a power amplifier is provided. The method comprise applying CFR to the input signal to obtain a processed input signal; determining a minimum CFR threshold; comparing the peak power of the power amplifier and an allowable peak power; and if the peak power is below the allowable peak power, determining a final CFR threshold by increasing the minimum CFR threshold, or if the peak power is not below the allowable peak power, reducing the average output power until peak power reaches the allowable peak power.

公开(公告)号：EP1714404B3

公开(公告)日：2014-07-23

申请号：EP05721851.3

申请日：2005-02-14

Applicant: Samsung Electronics Co., Ltd.

Inventor： CHO, Joon-Young, 124-802 Hwanggolmaeul 1-danji APT ,  LEE, Ju-Ho 730-304 Salgugol Hyundai APT ,  HEO, Youn-Hyoung ,  KWAK, Yong-Jun ,  KIM, Young-Bum

IPC: H04B7/26 ,  H04B1/707 ,  H04J11/00

CPC classification number: H04B1/707 ,  H04B2201/70706 ,  H04J13/0044 ,  H04J13/20

Abstract: The present invention supposes a situation in which an Enhanced Uplink Dedicated transport Channel (EUDCH) is used in a Wideband Code Division Multiple Access (WCDMA) system. In a user equipment (UE), when physical channels for transmitting EUDCH data are transmitted in addition to existing physical channels, a Peak-to-Average Power Ratio (PAPR) of an uplink transport signal increases. The increase in PAPR depends upon Orthogonal Variable Spreading Factor (OVSF) codes allocated to the corresponding physical channels and in-phase/quadrature-phase (I/Q) channels. Therefore, the present invention proposes an apparatus and method for allocating optimum OVSF codes and I/Q channels to EUDCH-related physical channels in order to minimize an increase in PAPR due to EUDCH.

公开(公告)号：EP2019495B1

公开(公告)日：2013-10-09

申请号：EP08160835.8

申请日：2008-07-21

Applicant: Exelis Inc.

Inventor： Djuknic, Goran

IPC: H04B1/69 ,  H04B1/692 ,  H04B1/713

CPC classification number: H04B1/713 ,  H04B1/692 ,  H04B2201/70706

公开(公告)号：EP1569350B1

公开(公告)日：2012-10-24

申请号：EP03776001.4

申请日：2003-12-02

Applicant: NEC Corporation

Inventor： NAWATA, Hizuru

IPC: H04B1/707 ,  H04B1/04 ,  H04J13/00 ,  H03F3/24

CPC classification number: H04B1/707 ,  H03F1/02 ,  H03G3/3036 ,  H03G7/06 ,  H04B2001/0416 ,  H04B2201/70706

Abstract: A power limiting apparatus includes a function generating section and a delay calculating section. The function generating section calculates power values of an input signal and generates a weighting function for power limitation from the calculated power values. The delay calculating section delays the input signal and carry out the power limitation on the delayed input signal by using the weighting function generated by the function generating section.

公开(公告)号：EP1821420B1

公开(公告)日：2012-02-22

申请号：EP06013116.6

申请日：2006-06-26

Applicant: FUJITSU LIMITED

Inventor： Kawasaki, Toshio c/o Fujitsu Limited

IPC: H04B1/707 ,  H04B1/69

CPC classification number: H04B1/692 ,  H04B1/7097 ,  H04B2201/70706

公开(公告)号：EP1983669A4

公开(公告)日：2012-01-11

申请号：EP06712677

申请日：2006-01-31

Applicant: FUJITSU LTD

Inventor： YOKOYAMA HITOSHI

IPC: H04J11/00 ,  H04L5/00 ,  H04L27/26

CPC classification number: H04L27/2614 ,  H04B2201/70706 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0058