WO2004100415A1 - Cdma送信装置およびcdma送信方法 - Google Patents
Cdma送信装置およびcdma送信方法 Download PDFInfo
- Publication number
- WO2004100415A1 WO2004100415A1 PCT/JP2004/006154 JP2004006154W WO2004100415A1 WO 2004100415 A1 WO2004100415 A1 WO 2004100415A1 JP 2004006154 W JP2004006154 W JP 2004006154W WO 2004100415 A1 WO2004100415 A1 WO 2004100415A1
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- WO
- WIPO (PCT)
- Prior art keywords
- data
- specific data
- groups
- transmission
- cdma
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 81
- 238000004891 communication Methods 0.000 claims abstract description 28
- 230000009897 systematic effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0064—Concatenated codes
- H04L1/0066—Parallel concatenated codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/005—Optical Code Multiplex
-
- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
Definitions
- the present invention is intended to transmit signals from a plurality of transmitting antennas, such as MIMO (Multi-Input / Multi-Output) communication, and to provide CDMA (Code Division Multiple Access).
- MIMO Multi-Input / Multi-Output
- CDMA Code Division Multiple Access
- the present invention relates to a transmission device and a transmission method employing an Access) method.
- MI-MO Multi-Input I Multi-Output
- MIMO communication different transmission data (substreams) are transmitted from multiple antennas on the transmission side, and the reception side separates multiple transmission data mixed on the propagation path into the original transmission data using propagation path estimation values.
- a signal transmitted from a transmitting device is received by the same number or more antennas than the number of transmitting devices, and the signals received by each of the antennas are individually inserted into the signals.
- the channel characteristics between the antennas are estimated based on the mouth signal.
- This estimated channel characteristic H is represented by a matrix of 2 rows ⁇ 2 columns, for example, when there are two transmitting antennas and two receiving antennas.
- a transmission signal transmitted from each transmission antenna is obtained based on the inverse matrix of the channel characteristic H and the reception signal obtained at each reception antenna.
- signals transmitted at the same timing and the same frequency from a plurality of transmitting antennas can be separated for each substream on the receiving side. Transmission of data volume This enables high-speed, large-capacity communication.
- An object of the present invention is to improve the reception performance of a receiving side for specific data while maintaining the transmission efficiency of a communication system.
- the purpose of this is to use a CDMA transmitter that transmits code-division multiplexed signals, each of which is different, from multiple transmission antennas.Specific data is allocated to multiple antennas, and different spreading codes are assigned and spread. It is solved by transmitting after modulating.
- FIG. 1 is a block diagram showing a main configuration of a CDMA transmitting apparatus according to Embodiment 1 of the present invention
- FIG. 2 is a block diagram showing a main configuration inside a control unit according to Embodiment 1 of the present invention
- FIG. 3 shows a configuration of a transmission signal of the CDMA transmitting apparatus according to Embodiment 1 of the present invention. Diagram showing an example of
- FIG. 4 is a diagram showing another column of the configuration of the transmission signal of the CDMA transmission device according to Embodiment 1 of the present invention.
- FIG. 5 is a diagram illustrating an example of a configuration of a signal transmitted by a conventional CDMA transmitting apparatus.
- FIG. 1 is a block diagram showing a main configuration of a CDMA transmitting apparatus according to Embodiment 1 of the present invention.
- this CDMA transmitting apparatus has two antennas, but the number of antennas is not limited to this and may be three or more.
- This CDMA transmitting apparatus includes an S / P conversion unit 101, a spreading unit 102 (102-1-1 to 102-N), 103 (103-1 to: L03-N), and an adding unit 104- 1, 104-2, transmitting section 105-1, 105-2, antennas 106-1, 106_2, spreading control section 107, and control section 110.
- the section from the spreading section 102 to the antenna 106-1 is called a first transmission system
- the section from the spreading section 103 to the antenna 106-2 is called a second transmission system.
- control section 110 After recognizing the type of data included in the input transmission signal, control section 110 outputs the transmission signal to SZP conversion section 101. Further, control section 110 outputs control signal C 1 to S / P conversion section 101 and diffusion control section 107 in accordance with the type of the recognized data. Further, control section 110 controls the control signal according to a retransmission flag notified from a receiving section (not shown) that has received the retransmission request from the receiving side. The signal C 2 is output to the S / P converter 101 and the spread controller 107. The detailed operation of the control unit 110 will be described later.
- the S / P conversion unit 101 converts the transmission signal output from the control unit 110 into parallel data separated for each transmission system, and the corresponding spreading units 102 — 1 to: L 02 —N and Outputs to spreading units 103-1 to 103-N.
- Spreading section 102 spreads each data under the control of spreading control section 107 in spreading sections 102-1 to 102 -N corresponding to the parallelized data output from SZP converting section 101. Processing is performed and output to addition section 104-11.
- spreading section 103 transmits data under the control of spreading control section 107 in spreading sections 103-1 to 103 _N corresponding to the respective pieces of parallelized data output from SZP conversion section 101. Diffusion processing is performed, and the result is output to adder 104-2.
- Adders 104-1 and 104_2 add (multiplex) the parallelized data output from spreading sections 102 and 103, respectively, and output them to transmitting sections 105-1 and 105-2.
- the transmitting sections 105-1 and 105-2 perform predetermined radio transmission processing such as up-comparison on the multiplexed signals output from the adding sections 104-1 and 104-2. This data is transmitted wirelessly via 106-2.
- FIG. 2 is a block diagram showing a main configuration inside control unit 110.
- the control unit 110 includes a data recognition unit 111, a buffer 112, and a retransmission control unit 113.
- the data recognition unit 111 recognizes the type of data included in the transmission signal based on the line quality and moving speed of the receiving side output from the line quality measuring unit and the moving speed measuring unit (both not shown). After that, write the transmission signal to buffer 112. Further, data recognition section 111 outputs control signal C 1 to S / P conversion section 101 and spread control section 107 according to the type of the recognized data.
- Retransmission control section 113 receives a retransmission request from the receiving side and receives a retransmission request from a receiving section (not shown).
- the control signal C 2 is output to the S // P conversion unit 101 and the buffer 112 according to the retransmission flag that is known.
- the buffer 112 outputs the buffered data to the S / P converter 101 based on the control signal C2 output from the retransmission controller 113.
- the above-described data type recognition processing performed by the data recognizing unit 111 refers to the data that the CDMA transmitting apparatus according to the present embodiment wants to prioritize during transmission (hereinafter, referred to as specific data) by distinguishing it from other data.
- the specific data is, specifically, a control signal for controlling communication with the receiving side, or a receiving side having a poor line quality (line quality is lower than a predetermined level) or a high moving speed ( (The moving speed is higher than the specified value.) This is data to be transmitted to the receiving side.
- the data recognition unit 111 notifies the S / P conversion unit 101 and the diffusion control unit 107 of specific data information indicating which data is the specific data using the control signal C1.
- the specific data also includes data for which retransmission is requested from the receiving side (retransmission data) or data for which the number of retransmissions is large (the number of retransmissions is equal to or greater than a predetermined number).
- the retransmission control unit 113 notifies the SZP conversion unit 101 and the spread control unit 107 of these specific data using the control signal C2.
- the S / P converter 101 spreads the transmission data output from the controller 110 based on the specific data information notified by the control signals C 1 and C 2, and spreads the transmission data 102-1 to 102- N, 103-3-: Sort to L03-N. If the transmission data is not specific data but data indicating only information, each transmission data is almost equally distributed to each spreading unit to increase transmission efficiency. On the other hand, if the transmission data is specific data, the data is read from the buffer 112 at least twice, and the data is read from both the first transmission system and the second transmission system (when three or more transmission systems are used). Are transmitted using at least two or more transmission systems).
- Spreading control section 107 performs spreading modulation with a different spreading code for the specific data allocated to the first transmission system and the second transmission system (different between the first transmission system and the second transmission system). As described above, the spreading units 102 and 103 are controlled using the control signal C3.
- each spreading unit The specific data and other data spread-modulated by each spreading unit are multiplexed for each transmission system by adding units 104-1 and 104-2, respectively, and transmitting units 105-1 and 105. It is wirelessly transmitted via _2 and antennas 106-6-1, 106-6-2.
- FIG. 3 is a diagram showing an example of a configuration of a transmission signal of the CDMA transmitting apparatus according to the present embodiment.
- the case where the specific data is retransmission data is taken as an example.
- data 1 transmitted at the first transmission timing is data transmitted to users from user 1 to user 2N, and is transmitted from the first transmission system (antenna 1) to the user.
- Data 1 addressed from 1 to user N is transmitted, and data 1 addressed from user (N + 1) to user 2 N is transmitted from the second transmission system (antenna 2).
- retransmission data is transmitted together with data 1.
- This retransmission data is specific data, and is distributed to both the first transmission system and the second transmission system and spread and modulated by different spreading codes according to the configuration of the CDMA transmitting apparatus according to the present embodiment.
- Data 2 transmitted at the next transmission timing also has the same configuration as data 1 as shown in the figure.
- FIG. 4 is a diagram showing another example of the configuration of the transmission signal of the CDMA transmitting apparatus according to the present embodiment.
- data 1 addressed to user N to user N and data 2 also addressed to user 1 to user N are transmitted by the first transmission system (antenna 1) and the second transmission
- the case of simultaneous transmission using the system (antenna 2) is shown as an example. As before, these data are not specific.
- data 1 and data 2 Retransmission data is also transmitted.
- This retransmission data is specific data, and is distributed to both the first transmission system and the second transmission system and spread-modulated with different spreading codes by the configuration of the CDMA transmitting apparatus according to the present embodiment. I have.
- the data transmitted at the next transmission timing is data addressed from the user (N + 1) to the user 2N, as shown in the figure.
- FIG. 5 is a diagram showing an example of a configuration of a signal transmitted by the conventional CDMA transmitting apparatus under the same condition setting as above. For example, if an interference compensation error occurs in a signal transmitted from antenna 1, retransmission data results in a reception error, so that the transmission side repeats retransmission, and the transmission efficiency of the communication system deteriorates.
- the CDMA transmitting apparatus since the CDMA transmitting apparatus according to the present embodiment transmits different data using two transmission systems, the high transmission efficiency, which is a characteristic feature of MIMO communication, is maintained. ing.
- two transmission systems or at least two transmission systems if there are three or more transmission systems) are used and spread modulation is performed using different spreading codes. Even if the interference compensation error increases due to the influence of noise on the receiving side, that is, even if the separation performance by the MIMO technique cannot be sufficiently obtained, the signal is separated by despreading. be able to.
- the number of data retransmissions may be used instead of the line quality. If the line quality is poor, the number of data retransmissions should have increased.
- the CDMA transmitting apparatus can also be used for a transmitting apparatus using a multi-carrier scheme such as OFDM (Orthogonal Frequency Division Multiplex).
- a multi-carrier scheme such as OFDM (Orthogonal Frequency Division Multiplex).
- An apparatus can be provided. Since the transmission rate using a multicarrier is set to a low symbol rate (a long symbol length), it has the effect of reducing intersymbol interference due to multipath in a multipath environment. In addition, by introducing a guard interval, it is possible to eliminate intersymbol interference due to multipath.
- each element constituting the present invention is provided in one CDMA transmitting apparatus.
- the present invention provides a spreader 102 to an antenna 1066-1,
- the spreading unit 103 to the antenna 106-6, the spreading control unit 107, and the control unit 110 are provided in different devices, respectively, and constitute a single communication system as a whole. Is also applicable.
- the MIMO communication has been described as an example, but the present invention is not limited to the MIMO communication, and may be applied to a case where different data are transmitted in parallel from a plurality of antennas (transmission systems).
- the CDMA transmitting apparatus can be mounted on a communication terminal apparatus and a base station apparatus in a mobile communication system, thereby providing a communication terminal apparatus and a base station apparatus having the same operational effects as described above. can do.
- the present invention is configured by hardware has been described as an example, but the present invention can be realized by software.
- the present invention can be applied to a transmitting apparatus and a transmitting method that transmit signals from a plurality of transmitting antennas and employ a CDMA scheme like MIMO communication.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
- Error Detection And Correction (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19178481.8A EP3633863B1 (en) | 2003-05-09 | 2004-04-28 | Cdma transmitting apparatus and cdma transmitting method |
US10/522,980 US7251469B2 (en) | 2003-05-09 | 2004-04-28 | CDMA transmitting apparatus and CDMA transmitting method |
EP04730067.8A EP1630993B1 (en) | 2003-05-09 | 2004-04-28 | Cdma transmitting apparatus and cdma transmitting method |
ES04730067T ES2741894T3 (es) | 2003-05-09 | 2004-04-28 | Aparato de transmisión de CDMA y método de transmisión de CDMA |
US11/767,124 US7764711B2 (en) | 2003-05-09 | 2007-06-22 | CDMA transmission apparatus and CDMA transmission method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003132133A JP3799030B2 (ja) | 2003-05-09 | 2003-05-09 | Cdma送信装置およびcdma送信方法 |
JP2003-132133 | 2003-05-09 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10522980 A-371-Of-International | 2004-04-28 | ||
US11/767,124 Continuation US7764711B2 (en) | 2003-05-09 | 2007-06-22 | CDMA transmission apparatus and CDMA transmission method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004100415A1 true WO2004100415A1 (ja) | 2004-11-18 |
Family
ID=33432154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/006154 WO2004100415A1 (ja) | 2003-05-09 | 2004-04-28 | Cdma送信装置およびcdma送信方法 |
Country Status (7)
Country | Link |
---|---|
US (2) | US7251469B2 (ja) |
EP (2) | EP3633863B1 (ja) |
JP (1) | JP3799030B2 (ja) |
CN (1) | CN100578989C (ja) |
ES (2) | ES2741894T3 (ja) |
PT (2) | PT1630993T (ja) |
WO (1) | WO2004100415A1 (ja) |
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KR20090042916A (ko) * | 2006-08-17 | 2009-05-04 | 파나소닉 주식회사 | 무선 송신 장치 및 무선 송신 방법 |
KR101321394B1 (ko) * | 2007-07-18 | 2013-10-25 | 삼성전자주식회사 | 이동체 안테나 제어 방법 및 이를 이용한 이동체 안테나제어 시스템 |
US8099132B2 (en) * | 2007-08-15 | 2012-01-17 | Qualcomm Incorporated | Antenna switching and uplink sounding channel measurement |
JP5124306B2 (ja) * | 2008-02-18 | 2013-01-23 | 株式会社Kddi研究所 | 無線基地局制御装置および無線基地局制御方法 |
JP5892496B2 (ja) * | 2010-09-29 | 2016-03-23 | マーベル ワールド トレード リミテッド | データユニット内のデータを複数の空間ストリームにパーシングする方法、生成されたデータユニットを復号する方法、無線ネットワークにおいて送信されるべきデータユニットを生成する装置、および、受信したデータユニットを復号する装置 |
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- 2004-04-28 CN CN200480000627A patent/CN100578989C/zh not_active Expired - Lifetime
- 2004-04-28 PT PT47300678T patent/PT1630993T/pt unknown
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- 2004-04-28 ES ES19178481T patent/ES2884599T3/es not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
EP1630993B1 (en) | 2019-06-19 |
US7251469B2 (en) | 2007-07-31 |
US7764711B2 (en) | 2010-07-27 |
EP3633863A1 (en) | 2020-04-08 |
JP3799030B2 (ja) | 2006-07-19 |
EP1630993A1 (en) | 2006-03-01 |
US20070253506A1 (en) | 2007-11-01 |
PT1630993T (pt) | 2019-10-08 |
US20050254476A1 (en) | 2005-11-17 |
EP1630993A4 (en) | 2012-06-27 |
PT3633863T (pt) | 2021-07-28 |
CN1698299A (zh) | 2005-11-16 |
JP2004336561A (ja) | 2004-11-25 |
CN100578989C (zh) | 2010-01-06 |
ES2884599T3 (es) | 2021-12-10 |
EP3633863B1 (en) | 2021-06-16 |
ES2741894T3 (es) | 2020-02-12 |
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