BRPI0513984A - dispositivo de comunicação de rádio e método de comunicação de rádio - Google Patents

dispositivo de comunicação de rádio e método de comunicação de rádio

Info

Publication number
BRPI0513984A
BRPI0513984A BRPI0513984-8A BRPI0513984A BRPI0513984A BR PI0513984 A BRPI0513984 A BR PI0513984A BR PI0513984 A BRPI0513984 A BR PI0513984A BR PI0513984 A BRPI0513984 A BR PI0513984A
Authority
BR
Brazil
Prior art keywords
radio communication
frequency components
communication device
unit
weighting
Prior art date
Application number
BRPI0513984-8A
Other languages
English (en)
Inventor
Akihiko Nishio
Original Assignee
Matsushita Electric Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of BRPI0513984A publication Critical patent/BRPI0513984A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H04B17/327—Received signal code power [RSCP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/12—Frequency diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
    • H04L27/2636—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

DISPOSITIVO DE COMUNICAçãO DE RáDIO E MéTODO DE COMUNICAçãO DE RáDIO. A presente invenção refere-se ao dispositivo de comunicação de rádio capaz de suavizar a influência de um desvanecimento seletivo de freqüência na transmissão de faixa larga de um portador único, para assim impedir a deterioração das características de taxa de erro. Neste dispositivo, uma unidade FFT (13) submete um sinal modulado introduzido de uma unidade de modulação (12) a uma transformação Fourier. Uma unidade de inserção piloto (14) insere um símbolo piloto em uma pluralidade de componentes de freqüência individuais (1-N) do sinal modulado. As unidades de multiplicação de ponderação (15-1, 15-2) multiplicam os componentes de freqüência individuais (1-N) e os símbolos pilotos inseridos nos componentes de freqüência individuais (1-N) pelos coeficientes de ponderação (W11-W1N, W21-W2N) ajustados em uma unidade de ajuste de coeficiente de ponderação (54). As unidades IFFT (16-1, 16-2) submetem os componentes de freqüência (1-N) a uma transformação Fourier inversa, convertendo assim os componentes de freqüência (1-N) em domínios de tempo.
BRPI0513984-8A 2004-07-30 2005-07-12 dispositivo de comunicação de rádio e método de comunicação de rádio BRPI0513984A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004224657 2004-07-30
PCT/JP2005/012843 WO2006011360A1 (ja) 2004-07-30 2005-07-12 無線通信装置および無線通信方法

Publications (1)

Publication Number Publication Date
BRPI0513984A true BRPI0513984A (pt) 2008-05-20

Family

ID=35786111

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0513984-8A BRPI0513984A (pt) 2004-07-30 2005-07-12 dispositivo de comunicação de rádio e método de comunicação de rádio

Country Status (7)

Country Link
US (4) US7869760B2 (pt)
EP (1) EP1760978A4 (pt)
JP (1) JP4592698B2 (pt)
KR (1) KR20070046832A (pt)
CN (1) CN1969521A (pt)
BR (1) BRPI0513984A (pt)
WO (1) WO2006011360A1 (pt)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8484272B2 (en) 2004-08-20 2013-07-09 Qualcomm Incorporated Unified pulse shaping for multi-carrier and single-carrier waveforms
JP2009524278A (ja) * 2006-01-18 2009-06-25 エヌエックスピー ビー ヴィ 無線通信システム
CN101110803B (zh) * 2006-07-18 2011-06-01 大唐移动通信设备有限公司 一种基于快速傅立叶变换和反变换联合运算的实现方法
JP2008206045A (ja) * 2007-02-22 2008-09-04 Nippon Telegr & Teleph Corp <Ntt> 無線通信システム及び無線機
BRPI0808529A2 (pt) * 2007-03-02 2014-11-11 Qualcomm Inc Técnicas de filtragem e controle automático de ganho para uso em repetidor em canal.
JP4871813B2 (ja) * 2007-08-28 2012-02-08 株式会社日立製作所 無線通信装置、無線通信方法及びピーク抑圧方法
JP5046160B2 (ja) * 2007-10-24 2012-10-10 日本電信電話株式会社 無線通信システム、無線通信システムの周波数および帯域可変方法、送信装置、受信装置
GB2466070B (en) * 2008-12-12 2014-04-30 Nokia Corp An apparatus
JP5196404B2 (ja) * 2009-04-17 2013-05-15 日本電信電話株式会社 ディジタル無線通信装置
JP5476552B2 (ja) * 2010-06-08 2014-04-23 日本電信電話株式会社 ピーク送信電力制限方法、及び無線通信システム
US9059765B2 (en) * 2012-03-01 2015-06-16 Mitsubishi Electric Corporation Reception device and reception method
EP2868049A4 (en) * 2012-06-29 2016-02-24 Ericsson Telefon Ab L M BASIC BAND PROCESSING OF TDD DUPLEX SIGNALS
CN104753834B (zh) * 2013-12-27 2018-04-17 电信科学技术研究院 一种信道估计方法和装置
EP3092760A4 (en) * 2014-01-08 2017-10-18 LG Electronics Inc. Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals
US9100339B1 (en) * 2014-03-27 2015-08-04 Cable Television Laboratories, Inc. Network failure detection and prediction using signal measurements
CN104467938B (zh) * 2014-11-20 2018-06-22 京信通信系统（中国）有限公司 选择分集接收合并模式的方法和系统
CN105142173B (zh) * 2015-08-27 2018-10-12 华为技术有限公司 一种信号输出装置、板卡和方法
US9998949B2 (en) * 2015-12-31 2018-06-12 Facebook, Inc. Switched diversity in data link layers of directional networks

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7092352B2 (en) * 1993-07-23 2006-08-15 Aquity, Llc Cancellation systems for multicarrier transceiver arrays
JP3737264B2 (ja) 1998-01-14 2006-01-18 株式会社東芝 ダイバーシチ受信装置
ATE358924T1 (de) * 1998-06-15 2007-04-15 Motorola Inc Verfahren und gerät zur verbesserung der kapazität in einem funkkommunikationssystem
JP4287536B2 (ja) 1998-11-06 2009-07-01 パナソニック株式会社 Ｏｆｄｍ送受信装置及びｏｆｄｍ送受信方法
EP1067707A1 (en) 1999-07-09 2001-01-10 Alcatel Method to modify a current transmitted power distribution in case of macro-diversity and corresponding mobile Station
DE10025987C2 (de) * 2000-05-25 2002-04-04 Siemens Ag Verfahren zum Steuern der Downlink-Strahlformung
US6862271B2 (en) * 2002-02-26 2005-03-01 Qualcomm Incorporated Multiple-input, multiple-output (MIMO) systems with multiple transmission modes
US6842632B2 (en) 2002-12-30 2005-01-11 Nokia Corporation Apparatus, and associated method, for facilitating antenna weight selection utilizing deterministic perturbation gradient approximation
US6745009B2 (en) 2002-05-15 2004-06-01 Nokia Corporation Apparatus, and associated method, for facilitating antenna weight selection utilizing deterministic perturbation gradient approximation
US7392015B1 (en) * 2003-02-14 2008-06-24 Calamp Corp. Calibration methods and structures in wireless communications systems
US7983355B2 (en) * 2003-07-09 2011-07-19 Broadcom Corporation System and method for RF signal combining and adaptive bit loading for data rate maximization in multi-antenna communication systems

Also Published As

Publication number Publication date
WO2006011360A1 (ja) 2006-02-02
US8626077B2 (en) 2014-01-07
JPWO2006011360A1 (ja) 2008-05-01
US20110075757A1 (en) 2011-03-31
US7869760B2 (en) 2011-01-11
US8340589B2 (en) 2012-12-25
US20080311863A1 (en) 2008-12-18
CN1969521A (zh) 2007-05-23
JP4592698B2 (ja) 2010-12-01
EP1760978A4 (en) 2012-01-04
US8140022B2 (en) 2012-03-20
KR20070046832A (ko) 2007-05-03
US20120142275A1 (en) 2012-06-07
US20130090069A1 (en) 2013-04-11
EP1760978A1 (en) 2007-03-07

Similar Documents

Publication Publication Date Title
BRPI0513984A (pt) dispositivo de comunicação de rádio e método de comunicação de rádio
WO2010018983A3 (en) Method of transmitting data using spatial multiplexing
ATE522057T1 (de) Ofdm-kanalschätzung
WO2007081592A3 (en) Method and apparatus for performing cyclic-shift diversity with beamforming
RU2006129926A (ru) Передача пилот-сигнала и оценивание канала для системы ofdm с избыточным разбросом задержки
JP5847869B2 (ja) Ｓｃ−ｆｄｍａ用送信ダイバーシティ
BRPI0513071A (pt) dispositivo de transmissão de rádio, dispositivo de recepção de rádio, método de transmissão de rádio e método de recepção de rádio
WO2008084719A1 (ja) Ofdm方式を利用する移動通信システムで使用される送信装置、受信装置及び方法
WO2006020434A3 (en) Method and apparatus for subcarrier and antenna selection in mimo-ofdm system
EP2139185A3 (en) OFDM receiver capable of operating in a single-chip mode and a diversity mode
CA2384231A1 (en) Channel estimation for wireless systems with multiple transmit antennas
WO2007103183A3 (en) Method and apparatus for channel estimation in an orthogonal frequency division multiplexing system
WO2006031540A3 (en) Method and system for optimization of channel estimation and synchronization in an ofdm-mimo wireless communication system
CN102960038B (zh) 在单载波通信系统中的待发送信号
BRPI0513804A (pt) dispositivo de transmissão de rádio, dispositivo de recepção de rádio, método de transmissão de rádio e método de recepção de rádio
US20130064277A1 (en) Method, Apparatus and System for Antenna Calibration
US7778343B2 (en) Method and apparatus for finite impulse response cyclic-shift diversity
CN103873406A (zh) 水声正交频分复用通信系统帧间干扰消除方法
CN104580057A (zh) 一种单载波mimo系统的时域导频及其同步方法
CN102780656A (zh) 一种多符号子载波干扰消除联合信道估计方法和装置
KR20010048447A (ko) Ｏｆｄｍ 시스템에서 ｃｙｃｌｉｃ ｓｕｆｆｉｘ를사용한 보호구간의 구현 방법 및 장치
WO2007084843A3 (en) A transmitter, cellular communication system and method of transmitting therefor
CN101091368A (zh) 用于在快速跳频正交频分复用通信系统中传送/接收信号的方法和设备
CN101997805B (zh) 导频符号的处理方法和装置
WO2007069203A3 (en) Ofdm system synchronization using correlations with known pilot patterns

Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 7A ANUIDADE.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: NAO APRESENTADA A GUIA DE CUMPRIMENTO DE EXIGENCIA. REFERENTE A 7A ANUIDADE.