WO2004014004A1 - マルチキャリア送信装置およびマルチキャリア送信方法 - Google Patents
マルチキャリア送信装置およびマルチキャリア送信方法 Download PDFInfo
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- WO2004014004A1 WO2004014004A1 PCT/JP2003/008747 JP0308747W WO2004014004A1 WO 2004014004 A1 WO2004014004 A1 WO 2004014004A1 JP 0308747 W JP0308747 W JP 0308747W WO 2004014004 A1 WO2004014004 A1 WO 2004014004A1
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- Prior art keywords
- data
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Classifications
-
- 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
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
Definitions
- the present invention relates to a multi-carrier transmission device and a multi-carrier transmission method.
- MIMO Multi Input Multi Output
- STC Space Time Coding
- each transmitting antenna when applying manolete carrier modulation such as OFDM (Orthogonal Frequency Division Multiplex) modulation to MIMO communication or STC communication as described above, by arranging each transmitting antenna at a certain distance from each other, The signal of each carrier transmitted from the transmitting antenna is affected by a different pattern of frequency selective fading, and the fading correlation between each transmitting antenna and the receiving antenna for each carrier decreases. Therefore, the receiving device can separate the signals transmitted from each transmitting antenna, and one transmitting Wireless communication can be performed at a higher transmission rate, which is several times the number of transmitting antennas, than when communication is performed using antennas.
- OFDM Orthogonal Frequency Division Multiplex
- An object of the present invention is to achieve a desired transmission rate without disposing a plurality of transmitting antennas at a large distance.
- the inventor of the present invention proposes that, when transmitting data of a plurality of sequences from a plurality of transmitting antennas, transmitting data from a plurality of transmitting antennas with a difference in transmission timing for each data of each sequence,
- the present invention is equivalent to being transmitted through different paths, and arrived at the present invention by paying attention to the fact that the data of each sequence is subjected to different patterns of frequency selective fading.
- the subject of the present invention is to duplicate the data to be transmitted from a plurality of transmitting antennas by the same number as each transmitting antenna, and to control the transmission timing of the duplicated data to be different from each other, It is transmitted from.
- a multicarrier transmission apparatus is a multicarrier transmission apparatus that transmits data of a plurality of streams from a plurality of antennas, and transmits data of each stream of the plurality of streams from the plurality of antennas.
- a multicarrier transmission method is a multicarrier transmission method for transmitting data of a plurality of streams from a plurality of antennas, wherein the data of each stream of the plurality of streams is transmitted to the plurality of antennas.
- FIG. 1 is a block diagram showing a main configuration of a multi-carrier transmitting apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a block diagram illustrating a configuration of a transmission timing control unit according to Embodiment 1
- FIG. 3 is a diagram illustrating an operation of the multi-carrier transmission device according to Embodiment 1
- FIG. 4A is a diagram showing an example of a subcarrier arrangement according to Embodiment 1,
- FIG. 4B is a diagram for explaining the effect of the multi-carrier transmitting apparatus according to Embodiment 1.
- FIG. 5 is a block diagram illustrating a configuration of a transmission timing control unit according to Embodiment 2 of the present invention.
- Figure 6A shows an example of a delay profile
- FIG. 6B is a diagram for explaining the operation of the multicarrier transmitting apparatus according to Embodiment 2.
- FIG. 1 is a block diagram showing a main configuration of a multi-carrier transmitting apparatus according to Embodiment 1 of the present invention.
- the multicarrier transmission apparatus shown in FIG. 1 has a modulation section 100—1-2, an S / P (Serial / Parallel: serial Z parallel) conversion section 110—1-2, an IFFT (Inverse Fast Fourier Transform: Inverse fast Fourier transform) unit 1 2 0 — 1 to 2, PS (Parallel / Serial: parallel Z-serial) conversion unit 1 30 — 1 to 2, stream duplication unit 1 40 — 1 to 2, transmission timing control unit 150 Adder 1 6 0—1-2, GI (Guard Interval) Adder 1 70—1-2, Wireless transmitter 1 80—1-2, and Transmit antenna 1 90—1-2 Have.
- S / P Serial / Parallel: serial Z parallel
- IFFT Inverse Fast Fourier Transform: Inverse fast Fourier transform
- PS Parallel / Serial: parallel Z-serial
- transmission timing control unit 150 Adder 1 6 0—1-2, GI (Guard Interval) Adder 1 70—1-2, Wireless transmitter 1 80—1-2, and Transmit antenna 1 90—1-2 Have.
- stream #A the flow of data input to modulation section 100-1 and output from P / S conversion section 130-1
- stream #B the flow of data input to modulation section 100-1 and output from P / S conversion section 130-1
- Modulating sections 100 modulate stream # and stream # 8, respectively.
- the SZP conversion sections 110-1-2 perform SZP conversion on the stream #A and the stream # 8, respectively, to obtain a plurality of series of data.
- the I FFT units 120-1 to 1-2 perform inverse fast Fourier transform on data of a plurality of streams of the corresponding streams.
- the P / S converters 130—1-2 perform PZS conversion on the data after inverse fast Fourier transform of the corresponding streams to obtain one series of data.
- Stream duplicating section 140-1 duplicates stream #A by the same number as the number of transmitting antennas (2 in this embodiment) and outputs the result to power calculating section 160-1 and transmitting timing control section 150 .
- the stream duplication unit 140-2 duplicates the stream #B by the same number as the transmission antenna (2 in this embodiment), and outputs it to the calorie calculation unit 160-1 and the transmission timing control unit 150.
- Transmission timing control section 150 controls the transmission timing of data transmitted from transmission antenna 190-2. Specifically, as shown in FIG. 2, the transmission timing control section 150 includes a delay section 152, a delay section 154, a data movement section 1556, And a delay time determination unit 158.
- the delay units 152 and 154 delay the transmission timings of the stream #A and the stream # 8 by the delay time determined by the delay time determination unit 158, respectively. At this time, the delay times of the stream #A and the stream #B determined by the delay time determining unit 158 are different from each other. In other words, stream # delayed by delay section 152 and stream # delayed by delay section 154 have different transmission timings. As a result, the transmission timing of stream #A transmitted from transmission antenna 19 9-1 is different from the transmission timing of stream #A transmitted from transmission antenna 190-0-2. The transmission timing of the stream #B transmitted from 0-1 and the stream # 8 transmitted from the transmission antenna 1900-2 will be different. Furthermore, the transmission timings of stream # and stream # 8 transmitted from transmitting antenna 190_2 also differ. This is equivalent to transmitting stream #A and stream # 8 from transmit antenna 190-0-1, and transmitting delayed waves with different delay times for each stream from transmit antenna 190-0-2. .
- stream #B has a longer delay time than stream #A.
- the delay time of stream #A and stream #B shall not exceed the guard interval length added by GI addition section 170-0-1-2.
- the data moving section 156 moves the data of the difference in the delay time between the stream #B and the stream #A, and adjusts the apparent transmission timing of the stream #A and the stream # 8.
- the adding section 160-0-1 adds the stream # and the stream #B.
- the adder 160-0-2 adds the stream #A and the stream #B whose transmission timing is controlled.
- GI addition section 1 7 0 Each of the adders 1 60 — 1 and 2 adds a guard interval to the data obtained by the addition.
- the wireless transmission units 180-1 to 180-2 perform predetermined wireless transmission processing (DZA conversion, up-conversion, etc.) on the data to which the guard interval has been added, and transmit the data via the transmission antennas 190-1 to 1-2. Send.
- DZA conversion, up-conversion, etc. predetermined wireless transmission processing
- the status of the data transmitted from 90-1 is shown.
- stream #A is modulated by modulation section 100-1, subjected to S / P conversion by S / P conversion section 110-1, and then inverse fast Fourier transformed by I FFT section 120-1 to form a PZS conversion section. 130-1 PZS conversion.
- stream #B is modulated by modulating section 100-2, S / P converted by SP converting section 110-2, and inverse fast Fourier transformed by IF FT section 120-2.
- P / S conversion is performed by the PZS converter 130-2.
- stream #A and stream #B become OFDM signals superimposed on a plurality of subcarriers whose frequencies are orthogonal to each other.
- stream #A is replicated by stream replicating section 140-1 by the same number as the number of transmission antennas (2 in this embodiment), and output to adding section 160-1 and delay section 152, respectively.
- stream #B is replicated by stream replicating section 140-2 by the same number as the number of transmitting antennas (2 in the present embodiment), and output to adding section 160_1 and delay section 154, respectively.
- the stream # output stream # 8 output to the adding section 160-1 is added to one data, and further added to the data by the GI adding section 170-1. Is added to the beginning of the data as a guard interval.
- the delay time is determined in advance.
- the delay time in delay section 154 that is, stream #B
- the delay time in delay section 152 that is, the delay time of stream #A. Is larger than the delay time.
- sea urchin by that shown in the lower part of FIG. 3 as compared to the delay time delta t A stream # A, the larger the delay time Ma ⁇ t B of the stream #B.
- the delay time delta t A and the delay time delta t B is the length neither exceed guard interval Roh Honoré length.
- the stream #A is delayed by the delay unit 152 by the delay time ⁇ t A determined by the delay time determination unit 158.
- stream #B is delayed by a delay time ⁇ t B determined by the delay time determination unit 158.
- the data transfer portion 156 the data portion of the difference in delay time between the stream #A in the stream #B ( ⁇ ⁇ ⁇ over ⁇ t A) is moved, stream # The apparent transmission timings of A and stream #B are aligned.
- the stream # and the stream #B obtained in this way are added by an adder 160-2 to form one data, as shown in the lower part of FIG.
- the data obtained as a result has a transmission timing delayed by ⁇ t A as compared with the upper part of FIG. 3 (the actual delay time of stream #B is ⁇ t B ). Furthermore, this data, the GI adding unit 170- 2, end portions of the data is added to the head of data as a guard I centers Bal.
- the data to which the guard interval has been added by the GI adding sections 170_1 and 2 in this way are subjected to predetermined wireless transmission processing (DZA conversion, up-conversion, etc.) by the corresponding wireless transmitting sections 180-1 and 180-2, respectively.
- the transmission is performed via transmission antennas 190-1-2.
- data transmitted from the transmission antennas 190- 2 that are sent with a delay of delta t A from data transmitted from the transmission antennas 190- 1. 8
- stream # A while being transmitted from the transmission antenna 1 9 0 1 will be transmitted at the transmission timing which is delayed by a delay time delta t A from the transmission antenna 1 9 0 2.
- the stream for the # B while being transmitted from the transmission antenna 1 9 0 1, transmit antenna 1 9 0 2 force will be transmitted at the transmission timing which is delayed by al delay time delta t B.
- delayed wave of the delay time between delta t A is transmitted together with the direct wave
- stream # B delay of delay time delta t B with the direct wave It is equivalent to transmitting a wave.
- stream #A and stream # 8 are transmitted on different paths, and the frequency-selective fading affected by each stream has a different pattern, i.e., the fading correlation is Will be lower.
- stream #A and stream #B are OFDM signals having a subcarrier arrangement as shown in FIG.4A
- stream # ('” and stream #B, J,” respectively) on the receiving side has completely different patterns as shown in Fig. 4B. This implies that the correlation of fading which affects stream #A 'received at stream #A at the receiving end and stream # ⁇ ' received at stream #B at the receiving end is very low.
- a plurality of streams are duplicated by the same number as the number of transmission antennas, and data for each of the duplicated streams is transmitted at different transmission timings. Since transmission is performed with a difference in transmission timing between the streams, the receiving side receives a delayed wave with a different delay time for each stream, and regards each stream as having transmitted a different path. be able to. In other words, the correlation of fading between each transmitting antenna and receiving antenna can be reduced, and a desired transmission rate can be achieved without disposing a plurality of transmitting antennas at a distance. (Embodiment 2)
- Embodiment 2 of the present invention is that the delay time of each stream is determined based on the information of the delay profile reported from the receiving side.
- FIG. 5 is a block diagram showing a configuration of a transmission timing control unit and peripheral components of the multi-transmission apparatus according to the present embodiment.
- the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.
- multicarrier transmission in which OFDM-modulated data is transmitted by MIMO will be described as an example of multicarrier transmission.
- the receiving side generates a delay profile of the signal transmitted from the multicarrier transmitting apparatus shown in FIG. 5, and transmits a signal including information of the generated delay profile. It is assumed that
- the multi-carrier transmitting apparatus shown in FIG. 5 includes a receiving antenna 200, a radio receiving unit 210, and a delay profile information acquiring unit 220.
- the transmission timing control section 150a has a delay section 152, a delay section 154, a data movement section 156, and a delay time determination section 158a.
- stream #Aj the flow of data input to modulation section 100-1 and output from PZS conversion section 130_1
- stream #B The flow of data input to the modulators 100 and 12 and output from the PZS converters 130-2 is referred to as “stream #B”.
- the transmission timing control section 150a controls the transmission timing of data transmitted from the transmission antenna 190_2 based on delay profile information reported from the receiving side. Specifically, the delay time determination unit 158a determines the delay time of the longest delayed wave received by the receiving side at the latest time (hereinafter, this delay) based on the delay profile information reported from the receiving side. Time is called the “maximum delay time”), and stream # is set so that this maximum delay does not exceed the guard interval length. Determine the delay time for A and stream #B. Delay section 152 and delay section 154 delay the transmission timing of stream #A and stream # 8, respectively, by the delay time determined by delay time determination section 1558a.
- the delay times of the stream #A and the stream #B determined by the delay time determining unit 158a are different from each other.
- the stream # delayed by the delay section 152 and the stream # 8 delayed by the delay section 154 have different transmission timings.
- the transmission timing of the stream # transmitted from the transmission antenna 190-0-1 differs from the transmission timing of the stream # transmitted from the transmission antenna 190-0-2.
- the transmission timing of the stream #B transmitted from 1 and the stream #B transmitted from the transmission antenna 1900-2 will be different.
- the transmission timings of stream #A and stream # 5 transmitted from transmitting antenna 190-0-2 are also different. This is equivalent to transmitting stream #A and the stream from transmitting antenna 190-0-1, and transmitting delayed waves having different delay times for each stream from transmitting antenna 190-0-2.
- the delay time of stream #B is longer than that of stream #A.
- the delay time of stream #A and stream #B shall not exceed the difference between the guard interval length added by GI addition sections 170-1 and 1-2 and the maximum delay time.
- the wireless reception unit 210 performs a predetermined wireless reception process (down-conversion, A / D conversion, etc.) on a signal received via the reception antenna 200 and including information of a delay profile.
- the delay profile information obtaining unit 220 obtains information of the delay profile generated by the receiving side from the reception signal received by the wireless reception unit 210.
- FIG. 6A is a diagram showing an example of a delay profile generated by a receiving device that receives a signal transmitted from the multi-carrier transmitting device according to the present embodiment. As shown in the figure, the maximum delayed wave of this signal is received with a delay of t MAX after receiving the direct wave.
- the receiving apparatus transmits a signal including the delay profile to the multi-carrier transmitting apparatus according to the present embodiment.
- the transmitted signal is received via the receiving antenna 200, and predetermined radio processing (down conversion, A / D conversion, etc.) is performed by the radio receiving unit 210. Then, the delay profile information acquisition section 220 acquires information of the delay profile included in the received signal. The acquired delay profile information is output to the delay time determination unit 158a.
- the maximum delay time t MAX is calculated from the delay profile information by the delay time determination unit 158 a, and t MAX is subtracted from the guard interval length t G j, thereby obtaining the transmission antenna 190-2.
- MAX which is the maximum value of the delay time of the transmitted stream A # A and stream #B, is calculated (see FIG. 6B).
- the delay time determination unit 1 5 8 a the delay time of the stream # A and stream # B can be determined to be a value within delta t MAX, is output to the delay unit 1 5 2 and the delay unit 1 5 4 You.
- the transmission timing for each stream is set within the range in which the delay times of all the delayed waves do not exceed the guard interval length. Since transmission is performed from multiple antennas with a difference, a desired transmission rate can be achieved without disposing multiple transmission antennas at a distance, and the occurrence of interference due to multiple buses is suppressed. However, it is possible to prevent reception quality from deteriorating on the receiving side.
- the multi-key having two transmitting antennas is used. Although the carrier transmitting apparatus has been described, the present invention is not limited to this, and the number of transmitting antennas may be three or more.
- a plurality of streams transmitted from one transmission antenna are configured to be transmitted simultaneously.
- a difference in transmission timing may be provided between streams transmitted from this transmission antenna. You may do it.
- a data moving unit may be provided before the adding unit to add the streams after adjusting the apparent transmission timing.
- a multi-carrier transmitting apparatus that performs MIMO communication has been described.
- other multi-carrier transmitting apparatuses that can simultaneously transmit signals of the same frequency from a plurality of antennas, such as STC communication, may be used. If so, the present invention can be applied.
- a desired transmission rate can be achieved without disposing a plurality of transmitting antennas at a large distance.
- the present invention can be applied to a multi-carrier transmission device and a multi-carrier transmission method.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03741304A EP1526668B1 (en) | 2002-07-31 | 2003-07-10 | Multi-carrier transmitting apparatus |
US10/494,754 US7471729B2 (en) | 2002-07-31 | 2003-07-10 | Multicarrier transmission apparatus and multicarrier transmission method |
AU2003281825A AU2003281825A1 (en) | 2002-07-31 | 2003-07-10 | Multi-carrier transmitting apparatus and multi-carrier transmitting method |
AT03741304T ATE524892T1 (de) | 2002-07-31 | 2003-07-10 | Mehrträgerübertragungsvorrichtung |
CN03801642.7A CN1596516B (zh) | 2002-07-31 | 2003-07-10 | 多载波发送装置和多载波发送方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002223491A JP3677492B2 (ja) | 2002-07-31 | 2002-07-31 | マルチキャリア送信装置およびマルチキャリア送信方法 |
JP2002-223491 | 2002-07-31 |
Publications (1)
Publication Number | Publication Date |
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WO2004014004A1 true WO2004014004A1 (ja) | 2004-02-12 |
Family
ID=31492108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/008747 WO2004014004A1 (ja) | 2002-07-31 | 2003-07-10 | マルチキャリア送信装置およびマルチキャリア送信方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7471729B2 (ja) |
EP (1) | EP1526668B1 (ja) |
JP (1) | JP3677492B2 (ja) |
CN (1) | CN1596516B (ja) |
AT (1) | ATE524892T1 (ja) |
AU (1) | AU2003281825A1 (ja) |
WO (1) | WO2004014004A1 (ja) |
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US8169889B2 (en) | 2004-02-18 | 2012-05-01 | Qualcomm Incorporated | Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system |
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US8233555B2 (en) | 2004-05-17 | 2012-07-31 | Qualcomm Incorporated | Time varying delay diversity of OFDM |
US7724835B2 (en) * | 2004-05-17 | 2010-05-25 | Qualcomm Incorporated | Space-time block coding in orthogonal frequency division communication systems |
US8582596B2 (en) | 2004-06-04 | 2013-11-12 | Qualcomm Incorporated | Coding and modulation for broadcast and multicast services in a wireless communication system |
US7110463B2 (en) | 2004-06-30 | 2006-09-19 | Qualcomm, Incorporated | Efficient computation of spatial filter matrices for steering transmit diversity in a MIMO communication system |
US7978649B2 (en) | 2004-07-15 | 2011-07-12 | Qualcomm, Incorporated | Unified MIMO transmission and reception |
US7978778B2 (en) | 2004-09-03 | 2011-07-12 | Qualcomm, Incorporated | Receiver structures for spatial spreading with space-time or space-frequency transmit diversity |
US7843887B2 (en) | 2004-11-02 | 2010-11-30 | Panasonic Corporation | Mobile station device and communication partner selection method |
EP1878133B1 (en) * | 2005-04-26 | 2015-03-04 | Intellectual Ventures I LLC | Systems and methods for transmitter diversity expansion |
JP4588548B2 (ja) * | 2005-06-15 | 2010-12-01 | 株式会社エヌ・ティ・ティ・ドコモ | 受信装置及び受信方法 |
US8543070B2 (en) | 2006-04-24 | 2013-09-24 | Qualcomm Incorporated | Reduced complexity beam-steered MIMO OFDM system |
US8290089B2 (en) | 2006-05-22 | 2012-10-16 | Qualcomm Incorporated | Derivation and feedback of transmit steering matrix |
US8144579B2 (en) * | 2007-06-29 | 2012-03-27 | Intel Corporation | Wireless performance improvement via client-free forward error correction |
KR20110031165A (ko) | 2008-07-04 | 2011-03-24 | 각고호우징 게이오기주크 | 멀티캐리어 통신 시스템 |
CN102111364B (zh) * | 2009-12-29 | 2013-09-11 | 上海无线通信研究中心 | 基于单天线正交频分复用的谱域信号发送装置及方法 |
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- 2003-07-10 AT AT03741304T patent/ATE524892T1/de not_active IP Right Cessation
- 2003-07-10 EP EP03741304A patent/EP1526668B1/en not_active Expired - Lifetime
- 2003-07-10 WO PCT/JP2003/008747 patent/WO2004014004A1/ja active Application Filing
- 2003-07-10 CN CN03801642.7A patent/CN1596516B/zh not_active Expired - Lifetime
- 2003-07-10 AU AU2003281825A patent/AU2003281825A1/en not_active Abandoned
- 2003-07-10 US US10/494,754 patent/US7471729B2/en active Active
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CN1596516A (zh) | 2005-03-16 |
CN1596516B (zh) | 2010-04-21 |
EP1526668A4 (en) | 2009-12-23 |
JP3677492B2 (ja) | 2005-08-03 |
JP2004064654A (ja) | 2004-02-26 |
EP1526668B1 (en) | 2011-09-14 |
EP1526668A1 (en) | 2005-04-27 |
US7471729B2 (en) | 2008-12-30 |
ATE524892T1 (de) | 2011-09-15 |
AU2003281825A1 (en) | 2004-02-23 |
US20050007982A1 (en) | 2005-01-13 |
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