WO2010013584A1 - Émetteur/récepteur radio, procédé de commande de modulation et programme - Google Patents

Émetteur/récepteur radio, procédé de commande de modulation et programme Download PDF

Info

Publication number
WO2010013584A1
WO2010013584A1 PCT/JP2009/062292 JP2009062292W WO2010013584A1 WO 2010013584 A1 WO2010013584 A1 WO 2010013584A1 JP 2009062292 W JP2009062292 W JP 2009062292W WO 2010013584 A1 WO2010013584 A1 WO 2010013584A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency offset
residual frequency
coding rate
correspondence table
modulation
Prior art date
Application number
PCT/JP2009/062292
Other languages
English (en)
Japanese (ja)
Inventor
陽介 福田
Original Assignee
日本電気株式会社
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 日本電気株式会社 filed Critical 日本電気株式会社
Publication of WO2010013584A1 publication Critical patent/WO2010013584A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation

Definitions

  • the present invention relates to an adaptive modulation control in which a radio transmission / reception apparatus adaptively selects a modulation scheme and a coding rate used for modulation and coding processing of a radio transmission signal transmitted to another radio transmission / reception apparatus according to a propagation path environment.
  • the present invention relates to a technique for performing (multi-rate control).
  • the combination of modulation scheme and coding rate MCS: Modulation Coding Scheme
  • the required carrier power to interference / noise power ratio Rquired CINR: Carrier to Interference and Noise Ratio
  • the coding rate include a forward error correction (FEC) coding rate used in a wireless base station of WiMAX (Worldwide Interoperability for Microwave Access).
  • FEC forward error correction
  • this type of wireless transmission / reception device based on the reception BER (Bit Error Rate) / FER (Frame Error Rate) characteristics of the wireless reception signal in the AWGN (Additive White Gaussian Noise) channel.
  • the created correspondence table is used.
  • modulation schemes with a shallow modulation degree BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), etc.
  • modulation schemes with a deep modulation degree 16QAM (Quadrature Amplitude Modulation), 64QAM, etc.
  • the required CINR satisfying a certain reception BER / FER characteristic standard is QPSK 3/4 (modulation method and forward error correction coding rate; the same applies hereinafter) and 16QAM 1/2.
  • QPSK 3/4 modulation method and forward error correction coding rate; the same applies hereinafter
  • 16QAM 1/2 there is a reverse between adjacent MCSs with different modulation schemes, such as between 16QAM 5/6 and 64QAM 1/2.
  • this method has a problem that, in a mobile environment where the communication partner is a mobile terminal, the channel is assumed to change dynamically, and thus cannot cope with the mobile environment.
  • an object of the present invention is to solve the above-described problems, and a wireless transmission / reception device, a modulation control method, and a modulation control method that can perform optimum adaptive modulation control according to the propagation path environment even when the propagation path environment is a mobile environment. And to provide a program.
  • the wireless transmission / reception apparatus of the present invention provides: A wireless transmission / reception apparatus that selects a modulation scheme and a coding rate of a wireless transmission signal according to a propagation path environment, A residual frequency offset measurement unit for measuring the residual frequency offset amount of the received radio reception signal; A storage unit that stores a plurality of correspondence tables of combinations of modulation schemes and coding rates and carrier power to interference / noise ratio (CINR); A correspondence table stored in the storage unit is selected based on the residual frequency offset amount measured by the residual frequency offset measurement unit, and a modulation scheme and a coding rate are selected based on the CINR in the selected correspondence table. And a modulation control unit.
  • CINR carrier power to interference / noise ratio
  • the modulation control method of the present invention comprises: A modulation control method by a radio transmission / reception apparatus that selects a modulation scheme and a coding rate of a radio transmission signal according to a propagation path environment, A storage step of storing a plurality of correspondence tables of combinations of modulation schemes and coding rates and carrier power to interference / noise power ratio (CINR); A measurement step for measuring a residual frequency offset amount of the received radio reception signal; Selecting a correspondence table based on the residual frequency offset amount, and selecting a modulation scheme and a coding rate based on the CINR in the selected correspondence table.
  • the program of the present invention To a wireless transmission / reception device that selects a modulation method and a coding rate of a wireless transmission signal according to a propagation path environment, A storage procedure for storing a plurality of correspondence tables of combinations of modulation schemes and coding rates and carrier power to interference / noise power ratio (CINR); A measurement procedure for measuring the residual frequency offset of the received radio reception signal; The correspondence table is selected based on the residual frequency offset amount, and a selection procedure for selecting a modulation scheme and a coding rate based on the CINR in the selected correspondence table is executed.
  • CINR carrier power to interference / noise power ratio
  • the wireless transmission / reception apparatus of the present invention dynamically switches a correspondence table between a combination of modulation scheme and coding rate (MCS) and carrier power to interference / noise power ratio (CINR) according to the residual frequency offset amount. Then, the modulation method and coding rate are selected. Therefore, optimum adaptive modulation control according to the propagation path environment is performed even when the required CINR satisfying a certain reception BER / FER characteristic criterion is reversed between adjacent MCSs in the AWGN channel and the multipath fading channel. The effect that it can be obtained.
  • MCS modulation scheme and coding rate
  • CINR carrier power to interference / noise power ratio
  • the wireless transmission / reception apparatus of the present invention since the wireless transmission / reception apparatus of the present invention measures the residual frequency offset amount of the wireless reception signal, it can perform optimum adaptive modulation control corresponding to a mobile environment where the propagation path environment fluctuates in time and space. The effect that it can be obtained.
  • FIG. 1 It is a block diagram which shows the structure of the wireless base station of one Embodiment of this invention. It is a figure which shows an example of the corresponding
  • the wireless transmission / reception apparatus of the present invention transmits / receives a wireless signal to / from a mobile terminal as a time division duplex frame (hereinafter referred to as a TDD (Time Division Duplex) frame), and performs MCS.
  • TDD Time Division Duplex
  • the present invention is not limited to this example.
  • the present invention is applied to a WiMAX radio base station in which the forward error correction coding rate is set as the coding rate.
  • FIG. 1 is a diagram showing a configuration of a radio base station 101 according to an embodiment of the present invention.
  • FIG. 1 shows only the components related to the present invention among the components of the radio base station 101.
  • a radio base station 101 of this embodiment includes a signal reception unit 102, a residual frequency offset measurement unit 103, a storage unit 104, an adaptive modulation control unit 105, and a signal transmission unit 106. is doing.
  • the signal receiving unit 102 receives a radio reception signal transmitted as a TDD frame from the mobile terminal.
  • the radio reception signal includes a measured value of downlink carrier power to interference / noise power ratio (CINR) measured by the mobile terminal.
  • CINR downlink carrier power to interference / noise power ratio
  • the residual frequency offset measuring unit 103 measures the residual frequency offset amount of the radio reception signal received by the signal receiving unit 102.
  • the storage unit 104 stores a plurality of correspondence tables of MCS and required CINR, which are combinations of modulation schemes and forward error correction code rates (see FIGS. 2A and 2B).
  • the administrator of the radio base station 101 creates the above correspondence table as follows and stores it in the storage unit 104.
  • the required CINR is reversed between QPSK 3/4 and 16QAM 1/2 and between 16QAM 5/6 and 64QAM 1/2 at a certain frequency offset amount.
  • the administrator sets the frequency offset amount confirmed above as the threshold value of the residual offset frequency and stores it in the storage unit 104.
  • the administrator creates a correspondence table (FIG. 2A) used when the residual frequency offset amount is smaller than the threshold value set above and a correspondence table (FIG. 2B) used when the residual frequency offset amount is greater than or equal to the threshold value. And stored in the storage unit 104.
  • the adaptive modulation control unit 105 compares the residual frequency offset amount measured by the residual frequency offset measurement unit 103 with a threshold value set in advance by the administrator, and based on the comparison result, a plurality of stored residual frequency offsets are stored in the storage unit 104. Select one of the correspondence tables.
  • the adaptive modulation control unit 105 selects the correspondence table in FIG. 2A when the residual frequency offset amount is smaller than the threshold value set above, and selects the correspondence table in FIG.
  • the adaptive modulation control unit 105 executes adaptive modulation control for performing modulation and coding processing by selecting a modulation scheme and a forward error correction code rate based on the required CINR in the selected correspondence table.
  • the adaptive modulation control unit 105 selects the correspondence table of FIG. 2A and the downlink CINR measurement value included in the radio reception signal is “16”, the measurement value is the required CINR “15”. "16QAM 3/4 is selected as the modulation scheme and the forward error correction code rate.
  • the signal transmission unit 106 transmits the radio reception signal modulated and encoded by the adaptive modulation control unit 105 to the mobile terminal as a TDD frame.
  • the signal receiving unit 102 the residual frequency offset measuring unit 103, and the signal transmitting unit 106 are well known to those skilled in the art and are not directly related to the present invention. Therefore, description of these detailed internal configurations is omitted.
  • the two correspondence tables in FIGS. 2A and 2B are stored in the storage unit 104, and among these, the correspondence table in FIG. 2A is the default table.
  • the residual frequency offset measuring unit 103 measures the residual frequency offset amount. To do.
  • step 303 the adaptive modulation control unit 105 compares the residual frequency offset amount with a threshold set in advance by the administrator.
  • step 305 the adaptive modulation control unit 105 executes adaptive modulation control using the default correspondence table of FIG. 2A stored in the storage unit 104.
  • step 304 the adaptive modulation control unit 105 changes to the correspondence table of FIG. 2B stored in the storage unit 104, and in step 305, the correspondence table of FIG. To perform adaptive modulation control.
  • step 306 the signal transmission unit 106 transmits the TDD frame subjected to the modulation and coding processing by the adaptive modulation control unit 105 to the mobile terminal.
  • adaptive modulation control section 105 dynamically switches the correspondence table between MCS, which is a combination of modulation scheme and forward error correction code rate, and required CINR, according to the residual frequency offset amount. After that, MCS is selected. Therefore, optimum adaptive modulation control according to the propagation path environment is performed even when the required CINR satisfying a certain reception BER / FER characteristic criterion is reversed between adjacent MCSs in the AWGN channel and the multipath fading channel. be able to.
  • MCS which is a combination of modulation scheme and forward error correction code rate
  • the residual frequency offset measurement unit 103 measures the residual frequency offset amount of the radio reception signal, so that it is suitable for a mobile environment in which the propagation path environment fluctuates in time and space. Modulation control can be performed.
  • the method performed in the radio base station 101 applied as the radio transmission / reception apparatus of the present invention may be applied to a program for causing a computer to execute.
  • the program can be stored in a storage medium and can be provided to the outside via a network.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Communication Control (AREA)

Abstract

L'invention porte sur un émetteur/récepteur radio qui comprend une unité de mesure de décalage fréquentiel résiduel qui mesure le décalage fréquentiel résiduel d'un signal de réception radio reçu ; une unité de stockage qui stocker plusieurs tables de correspondance entre des combinaisons de schémas de modulation et de débits de codage et des rapports porteuse sur interférence plus bruit (CINR) ; et une unité de commande de modulation qui sélectionne une table de correspondance stockée dans l'unité de stockage en fonction du décalage fréquentiel résiduel mesuré par l'unité de mesure de décalage fréquentiel résiduel et sélectionne un schéma de modulation et un débit de codage en fonction des CINR de la table de correspondance sélectionnée.
PCT/JP2009/062292 2008-07-29 2009-07-06 Émetteur/récepteur radio, procédé de commande de modulation et programme WO2010013584A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-194747 2008-07-29
JP2008194747A JP2010034834A (ja) 2008-07-29 2008-07-29 無線送受信装置、変調制御方法、およびプログラム

Publications (1)

Publication Number Publication Date
WO2010013584A1 true WO2010013584A1 (fr) 2010-02-04

Family

ID=41610283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/062292 WO2010013584A1 (fr) 2008-07-29 2009-07-06 Émetteur/récepteur radio, procédé de commande de modulation et programme

Country Status (3)

Country Link
JP (1) JP2010034834A (fr)
TW (1) TW201010326A (fr)
WO (1) WO2010013584A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101643634B1 (ko) 2012-02-20 2016-07-29 노키아 솔루션스 앤드 네트웍스 오와이 기지국과 사용자 장비 사이의 송신을 위한 변조 및 코딩 방식 제어
JPWO2016121341A1 (ja) 2015-01-28 2017-12-07 日本電気株式会社 光送信器、光通信システム、および光通信方法
JP7446678B2 (ja) 2020-03-16 2024-03-11 日本無線株式会社 無線受信装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003319007A (ja) * 2002-04-19 2003-11-07 Matsushita Electric Ind Co Ltd 基地局装置及びパケット伝送方法
JP2006217173A (ja) * 2005-02-02 2006-08-17 Matsushita Electric Ind Co Ltd 基地局装置及びリソース割り当て方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5050238B2 (ja) * 2004-06-14 2012-10-17 株式会社小松製作所 ダイクッション制御装置及びダイクッション制御方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003319007A (ja) * 2002-04-19 2003-11-07 Matsushita Electric Ind Co Ltd 基地局装置及びパケット伝送方法
JP2006217173A (ja) * 2005-02-02 2006-08-17 Matsushita Electric Ind Co Ltd 基地局装置及びリソース割り当て方法

Also Published As

Publication number Publication date
JP2010034834A (ja) 2010-02-12
TW201010326A (en) 2010-03-01

Similar Documents

Publication Publication Date Title
JP4671771B2 (ja) 無線通信装置及び無線通信方法
US8830967B2 (en) Method for performing an adaptive modulation and coding scheme in mobile communication system
JP5410509B2 (ja) 通信システムにおけるスペクトル利用効率を向上させるための方法、装置及び通信システム
AU2007282272B2 (en) Method of estimating signal-to-noise ratio, method of adjusting feedback information transmission, adaptive modulation and coding method using the same, and transceiver thereof
RU2479133C2 (ru) Устройство радиопередачи и способ радиопередачи
EP1813043B1 (fr) Methode pour un entrelacement adaptatif dans un systeme de communication sans fil presentant une retroaction
KR101126564B1 (ko) 무선통신장치 및 무선통신방법
US20100074195A1 (en) System and method of modulation and coding scheme adjustment for a lte shared data channel
KR20090111857A (ko) 통신 네트워크를 통해 프레임들을 송신하기 위한 방법 및 장치
WO2010013584A1 (fr) Émetteur/récepteur radio, procédé de commande de modulation et programme
US7937047B2 (en) Method and apparatus for transmitting data in mobile telecommunication system
EP2081340A2 (fr) Adaptation de niveau de quantification en utilisant un indicateur moyen de qualité de canal pour décodage HS-SCCH
JP4468160B2 (ja) サブキャリア適応制御方法及びその装置、無線装置
Latha et al. Effective communication in LTE-A using link adaptation technique
JP4777117B2 (ja) 適応変調制御装置、通信装置、及び、適応変調制御方法
WO2013140817A1 (fr) Système de communication, dispositif de communication et procédé de contrôle de communication
JP2008113159A (ja) 無線通信方法及びその装置
JP5324499B2 (ja) 無線品質の変動に基づいて送信機の送信電力を制御する受信機、プログラム及び方法
CN101427508A (zh) 针对上行链路移动通信的修改的双符号率
WO2014077085A1 (fr) Terminal de communication mobile, procédé de calcul de cqi et support d'enregistrement
Nguyen et al. Optimized receiver design for decode-and-forward relays using hierarchical modulation
JP2014155079A (ja) 無線基地局、及びその制御方法
JP2012235491A (ja) 無線通信方法および無線通信装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09802827

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09802827

Country of ref document: EP

Kind code of ref document: A1