WO2009104603A1 - 無線通信装置および無線通信方法 - Google Patents
無線通信装置および無線通信方法 Download PDFInfo
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- WO2009104603A1 WO2009104603A1 PCT/JP2009/052699 JP2009052699W WO2009104603A1 WO 2009104603 A1 WO2009104603 A1 WO 2009104603A1 JP 2009052699 W JP2009052699 W JP 2009052699W WO 2009104603 A1 WO2009104603 A1 WO 2009104603A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
- H04L5/0046—Determination of how many bits are transmitted on different sub-channels
-
- 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
- H04B7/0667—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 delayed versions of same signal
- H04B7/0669—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 delayed versions of same signal using different channel coding between antennas
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0606—Space-frequency coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0637—Properties of the code
- H04L1/0643—Properties of the code block codes
-
- 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
Definitions
- a processing unit a detection unit for detecting a value indicating a variation state of a propagation path between the other communication device and the own device, a value indicating the variation state detected by the detection unit, and the other communication device And a change processing unit that controls the processing unit to change the symbol to a control symbol based on a modulation scheme (modulation class) in communication between the communication device and the own apparatus, and a control unit that is controlled by the change processing unit.
- the solution of the present invention has been described as an apparatus.
- the present invention can be realized as a method, a program, and a storage medium that stores the program substantially corresponding to these, and the scope of the present invention. It should be understood that these are also included.
- each step of the method and program uses an arithmetic processing unit such as a CPU or DSP as necessary in data processing, and the input data, processed / generated data, etc. are stored in HDD, memory, etc. Is stored in the storage device.
- FIG. 1A is a configuration diagram of a wireless communication system according to an embodiment of the present invention.
- the wireless communication system includes a first communication device (transmitting station, base station) 100 that mainly functions as a transmitter, and a second communication device (user terminal) 200 that mainly functions as a receiver.
- FIGS. 2B and 2C are diagrams showing examples of block configurations of the first communication device and the second communication device, respectively. As shown in FIG.
- step S17 When STBC is applied to the slot in step S14, it is assumed that 10 symbols “R” are generated as shown in FIG. Accordingly, 10 additional pilot symbols are arranged in step S17. At this time, the additional pilot symbol is a position where an existing pilot symbol is not located in the time axis direction and a period during which the pilot symbol is not transmitted is almost equally divided.
- the combination of STBC In the example of FIG. 4, there are 24 sets.) Even if the number is reduced, they are arranged at positions where the reduction number is minimized.
- the STBC combinations do not decrease near the symbol position in the fourth column from the left in the time axis direction, which is a position that equally divides the period during which pilot symbols are not transmitted. 10 pilot symbols are added to the symbol positions in the fifth column from the left (see FIG. 5). Further, as shown in FIG. 5, a new STBC combination ST10 is created. A pilot symbol may be added to the symbol position in the third column from the left in the time axis direction, and the same effect as adding to the symbol position in the fifth column from the left can be obtained.
- the control unit 150 When the symbol processing according to the flowchart shown in FIG. 3 is completed, the control unit 150 outputs the transmission signal created by the symbol processing unit 160 to the transmission / reception unit 110, and the transmission / reception unit 110 receives the input transmission via the antenna group ANT1. Send a signal.
- the first communication device (base station) 100 includes two antennas, but the present invention is not limited to this. For example, since it is possible to transmit with any number of antennas by weighting two transmission signals, the number of antennas can be other than two.
- step M17 When SFBC is applied to the slot in step M14, 12 remaining symbols “R” are generated as shown in FIG. Accordingly, twelve additional pilot symbols are arranged in step M17.
- the additional pilot symbols are positions where the existing pilot symbols are not located in the frequency axis direction and the frequency bands in which the pilot symbols are not transmitted are approximately equally divided. Even if the number of (in the example of FIG. 11, there are 23 pairs) is reduced, the number of reductions is arranged at a minimum. That is, while increasing the frequency at which pilot symbols are transmitted to improve the accuracy of channel estimation, the reduction in data to be transmitted is minimized and the throughput before symbol processing (before adding pilot symbols) is maintained.
- FIG. 17 is an example of a flowchart for explaining symbol processing of the communication apparatus according to the third embodiment of the present invention.
- 18 to 22 are diagrams showing an example of the symbol configuration in the slot. Although only a single slot is shown in the figure, similar slots are adjacent to each other in the time axis direction and the frequency axis direction.
- the transmission / reception unit 110 in the third communication apparatus (base station) 300 receives a signal (carrier wave) from the second communication apparatus (terminal) 200 via the antenna group ANT3, and moves.
- the detection unit 120 acquires (detects) movement information of the second communication device 200 from the received carrier wave.
- each notification control of the change processing unit 170 based on the results of the determinations performed by the determination unit 130 may be performed immediately after the determination or may be performed after a certain time has elapsed.
- notification information (information such as changing data symbols to pilots or changing the number of remaining symbols to pilot symbols) is notified in a control information area called MAP in the WiMAX standard. be able to.
- the notification information is executed after a predetermined time has elapsed, the notification information is first transmitted as data to the second communication device (terminal) 200, and the symbol change processing described above can be executed from the subsequent communication frame.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
110 送受信部
120 移動状態検出部
130 判定部
140 メモリ
150 制御部
152 変調クラス決定部
160 シンボル処理部
170 変更処理部
180 通知部
200 第2の通信装置(端末)
210 送受信部
220 制御部
300 第3の通信装置(基地局)
500 通信装置
510 送受信部
520 制御部
530 特定処理部
ANT,ANT2 アンテナ
ANT1,ANT3 アンテナ群
ST1,ST2,ST10,ST20,ST30 STBCの組合せ
SF10,SF11,SF20 SFBCの組合せ
STF10 STFBCの組合せ
SLOT スロット
第1の実施例では、スロット内のデータシンボルをパイロットシンボル(制御用シンボル)に変更する場合に、スロット内のデータシンボルにSTBCを適用して、STBCのための組合せを作ることができないシンボル、すなわち余りのシンボルに対し、伝搬路(チャネル)の状態に応じた所定の処理が行われる。例えば図4を参照すると、図のようにSTBCを行うべく組み合わせられた、太線で囲った時間軸方向に隣接する2つのシンボルを、「STBCの1組」とする。すると、図において「R」を付したシンボルが、「余りのシンボル」、すなわち未処理のシンボルとなる。
第2の実施例では、スロット内のデータシンボルをパイロットシンボル(制御用シンボル)に変更する場合に、スロット内のデータシンボルにSFBCを適用して、SFBCのための組合せを作ることができないシンボル(余りのシンボル)に対し、伝搬路(チャネル)の状態に応じた所定の処理が行われる。例えば図11を参照すると、図のようにSFBCを行うべく組み合わせられた、太線で囲った周波数軸方向に隣接する2つのシンボルを、「SFBCの1組」とする。すると、図において「R」を付したシンボルが、「余りのシンボル」、すなわち未処理のシンボルとなる。
第3の実施例では、スロット内のデータシンボルをパイロットシンボル(制御用シンボル)に変更する場合に、スロット内のデータシンボルにSTFBCを適用して、STFBCのための組合せを作ることができないシンボル、すなわち余りのシンボルに対し、伝搬路(チャネル)の状態に応じた所定の処理が行われる。例えば図18を参照すると、図のようにSTFBCを行うべく組み合わせられた、太線で囲った時間軸方向および周波数軸方向に隣接する2つのシンボルを、「STFBCの1組」とする。すると、図において「R」を付したシンボルが、「余りのシンボル」、すなわち未処理のシンボルとなる。
Claims (5)
- 複数のシンボルで構成された複数のスロットを含む通信フレームを用いて適応変調方式で他の通信装置と自装置との間で通信を行う通信装置であって、
前記スロット毎にシンボル処理を行う処理部と、
前記他の通信装置と自装置との間の伝搬路の変動状態を示す値を検出する検出部と、
前記検出部により検出された前記変動状態を示す値と前記他の通信装置と自装置との間の通信における変調方式とに基づいて、前記シンボルを制御用シンボルに変更するように前記処理部を制御する変更処理部と、
前記変更処理部による制御後のスロットを含む通信フレームを前記他の通信装置へ送信する送信部と、
を備えることを特徴とする通信装置。 - 請求項1に記載の通信装置において、
前記変更処理部は、前記変動状態を示す値が、前記他の通信装置と自装置との間の通信における変調方式に基づく所定の値を超えた場合に、前記シンボルを制御用シンボルに変更するように前記処理部を制御する、
ことを特徴とする通信装置。 - 請求項1に記載の通信装置において、
前記変動状態を示す値は、前記他の通信装置と自装置との間の相対速度またはドップラー周波数である、
ことを特徴とする通信装置。 - 請求項1に記載の通信装置において、
前記変更処理部は、前記処理部により単一のスロットにおいてシンボル処理を行う場合に、前記単一のスロットにおいて未処理となるシンボルがある場合には、当該未処理となるシンボルを前記制御シンボルへ変更するように前記処理部を制御する、
ことを特徴とする通信装置。 - 複数のシンボルで構成された複数のスロットを含む通信フレームを用いて適応変調方式で他の通信装置と自装置との間で通信を行う通信方法であって、
前記スロット毎にシンボル処理を行うステップと、
前記他の通信装置と自装置との間の伝搬路の変動状態を示す値を検出するステップと、
前記検出するステップにより検出された前記変動状態を示す値と前記他の通信装置と自装置との間の通信における変調方式とに基づいて、前記シンボルを制御用シンボルに変更するステップと、
前記変更するステップによる制御後の通信フレームを前記他の通信装置へ送信するステップと、
を含むことを特徴とする通信方法。
Priority Applications (2)
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US12/867,869 US20100316152A1 (en) | 2008-02-18 | 2009-02-17 | Wireless communication apparatus and wireless communication method |
CN2009801054400A CN101946437A (zh) | 2008-02-18 | 2009-02-17 | 无线通信装置和无线通信方法 |
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JP2008-036312 | 2008-02-18 | ||
JP2008036312A JP2009194853A (ja) | 2008-02-18 | 2008-02-18 | 無線通信装置および無線通信方法。 |
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US (1) | US20100316152A1 (ja) |
JP (1) | JP2009194853A (ja) |
KR (1) | KR20100113580A (ja) |
CN (1) | CN101946437A (ja) |
WO (1) | WO2009104603A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102315883A (zh) * | 2011-05-12 | 2012-01-11 | 哈尔滨工程大学 | 基于非固定码元宽度的Pattern时延差编码水声通信方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2518509C2 (ru) * | 2009-09-21 | 2014-06-10 | Эппл Инк | Способ передачи потока данных и мобильная станция |
JP5906128B2 (ja) * | 2012-05-08 | 2016-04-20 | 日本放送協会 | 送信装置、受信装置、送信プログラム、受信プログラム |
US9967070B2 (en) * | 2014-10-31 | 2018-05-08 | Qualcomm Incorporated | Pilot reconfiguration and retransmission in wireless networks |
WO2018060397A1 (en) * | 2016-09-30 | 2018-04-05 | Nokia Solutions And Networks Oy | Resource element pairing for transmit diversity for wireless networks |
US10594525B2 (en) * | 2017-04-21 | 2020-03-17 | Mediatek Inc. | Dual-use of doppler mode indication in high efficiency wireless LAN |
Citations (4)
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WO2005015797A1 (ja) * | 2003-08-12 | 2005-02-17 | Matsushita Electric Industrial Co., Ltd. | 無線通信装置およびパイロットシンボル伝送方法 |
JP2006510315A (ja) * | 2002-12-13 | 2006-03-23 | 韓國電子通信研究院 | Ofdma基盤セルラーシステムの下向リンクのための信号構成方法及び装置 |
WO2006096007A1 (en) * | 2005-03-09 | 2006-09-14 | Samsung Electronics Co., Ltd. | Apparatus and method for mapping space-time coded data to subcarriers in a broadband wireless communication system |
JP2008035288A (ja) * | 2006-07-28 | 2008-02-14 | Kyocera Corp | 無線通信装置及び通信方法 |
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JP4412005B2 (ja) * | 2004-03-05 | 2010-02-10 | 株式会社日立製作所 | 適応変調方法並びにデータレート制御方法 |
JP4628150B2 (ja) * | 2004-03-29 | 2011-02-09 | パナソニック株式会社 | 通信装置及び通信方法 |
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- 2008-02-18 JP JP2008036312A patent/JP2009194853A/ja active Pending
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2009
- 2009-02-17 US US12/867,869 patent/US20100316152A1/en not_active Abandoned
- 2009-02-17 WO PCT/JP2009/052699 patent/WO2009104603A1/ja active Application Filing
- 2009-02-17 CN CN2009801054400A patent/CN101946437A/zh active Pending
- 2009-02-17 KR KR1020107018339A patent/KR20100113580A/ko not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006510315A (ja) * | 2002-12-13 | 2006-03-23 | 韓國電子通信研究院 | Ofdma基盤セルラーシステムの下向リンクのための信号構成方法及び装置 |
WO2005015797A1 (ja) * | 2003-08-12 | 2005-02-17 | Matsushita Electric Industrial Co., Ltd. | 無線通信装置およびパイロットシンボル伝送方法 |
WO2006096007A1 (en) * | 2005-03-09 | 2006-09-14 | Samsung Electronics Co., Ltd. | Apparatus and method for mapping space-time coded data to subcarriers in a broadband wireless communication system |
JP2008035288A (ja) * | 2006-07-28 | 2008-02-14 | Kyocera Corp | 無線通信装置及び通信方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102315883A (zh) * | 2011-05-12 | 2012-01-11 | 哈尔滨工程大学 | 基于非固定码元宽度的Pattern时延差编码水声通信方法 |
CN102315883B (zh) * | 2011-05-12 | 2013-10-30 | 哈尔滨工程大学 | 基于非固定码元宽度的Pattern时延差编码水声通信方法 |
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Publication number | Publication date |
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JP2009194853A (ja) | 2009-08-27 |
KR20100113580A (ko) | 2010-10-21 |
CN101946437A (zh) | 2011-01-12 |
US20100316152A1 (en) | 2010-12-16 |
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