WO2002021745A1 - Terminal de radio communication et procede de suppression de l'interference - Google Patents
Terminal de radio communication et procede de suppression de l'interference Download PDFInfo
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- WO2002021745A1 WO2002021745A1 PCT/JP2001/007676 JP0107676W WO0221745A1 WO 2002021745 A1 WO2002021745 A1 WO 2002021745A1 JP 0107676 W JP0107676 W JP 0107676W WO 0221745 A1 WO0221745 A1 WO 0221745A1
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- symbol power
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Classifications
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- 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
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
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- 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
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7107—Subtractive interference cancellation
-
- 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
-
- 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
- H04B7/0602—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 antenna switching
Definitions
- the present invention relates to an interference canceller for reducing the influence of interference from other stations in a wireless communication system using the CDMA system (hereinafter, referred to as “CDMA wireless communication system”), and more particularly to a multi-user interference canceller.
- CDMA wireless communication system a wireless communication system using the CDMA system
- One of the multiple access (Multiple Access) systems in which a number of wireless communication devices communicate with each other is a code division multiple access (CDMA) system using spread spectrum communication.
- CDMA code division multiple access
- the CD MA system has higher frequency efficiency and accommodates more users than the FDMA (Frequency Division Multiple Access) system. It has the characteristics that it can do.
- the channel capacity limit is determined by interference from other users in the own cell. Therefore, in order to increase the channel capacity, it is necessary to reduce interference in some way.
- an interference canceller IC
- MUD Multi User Detection
- all spreading codes other than the spreading code assigned to the own device hereinafter referred to as “interference codes” cause interference, so the MUD performs processing to reduce the influence of interference due to the interference codes.
- the MUD performs a correlation process on the received signal using the interference code, and then performs a complex multiplication by a channel estimation value of a signal obtained by multiplying the result of the correlation process by the interference code, thereby obtaining each interference code.
- a replica of the demodulated data is generated in the By subtracting the force from the received signal, the effect of interference due to the interference code is reduced.
- FIG. 1 shows a CDMA radio system that adopts a midamble as a known signal, and a base station device (hereafter, “BS”) performs wireless communication with a wireless communication terminal device (hereafter, “MS”) equipped with a MUD using the CDMA method.
- BS 11 performs CDMA wireless communication with MSs 21 to 28.
- MSs 21-28 have MUDs 31-38, respectively.
- a spreading code with a spreading factor of 16 spreading code # 1 to spreading code # 16
- FIG. 2 is an explanatory diagram showing a procedure for creating a midamble in a CDMA wireless communication system.
- a description will be given of a procedure for creating a midamble when eight different blocks are used.
- the phase of the basic code is shifted rightward in the figure by ⁇ W (n ⁇ 1) ⁇ chips from the reference time.
- n is the number of shifts of the base code (mid ampoule shift).
- the number of chips to be shifted is 0, W,..., 7W for the middle amplifier shift 1, the middle amble shift 2,.
- block A is used as a reference as an example.
- each code left for the length of 456 chips is circulated leftward in the figure by ⁇ Wx (n-1) ⁇ chips.
- the code left by the length of 456 chips is circulated leftward in the figure by W chips, and block B is located at the left end of the code.
- block B is located at the left end of the code.
- block A will be located at the end (right end) of the code.
- the same block as the top block in each code after the tour is added to the end, resulting in a 512-length code as a whole, and this code becomes the midamble pattern for each medium amplifier shift.
- the same block B 'as the first block B after the circulation is added to the end, so that a midamble shift 2 midamble pattern is obtained.
- the above-mentioned midambles are classified into two types, focusing on the transmission scheme of the midamble in the downlink.
- One is a separate midamble that allocates a different pattern amble for each spreading code and transmits the same, and the other is a common midamble that notifies all wireless communication terminals of the same (common) midamble.
- midamble shift 1 to midample shift 8 and the midamble are respectively associated with spreading codes # 1 to # 8, and this correspondence is known to both BS and MS.
- Spreading code # 9 to spreading code # 16 cannot be used because there is no midamble to be assigned.
- BS 11 is assigned for each spreading code
- the added stoff ampoule is added to the kar ampule provided between the departure and evening sections, and MS2 :! A transmission signal for 228 is formed, and this transmission signal is multiplexed and transmitted to MS 21 228.
- the MSs 21 to 28 receive the signal transmitted from the BS 11, and refer to the midamble included in the received signal to multiplex a signal obtained by multiplying the received signal by any spreading code.
- the MUDs 31 to 38 provided in the own device are notified of the determination result.
- the MUDs 31 to 38 know which spreading code is the interference code from the determination result, and perform correlation processing on the received signal using the spreading code that is the interference code.
- an interference replica is generated by complexly multiplying the correlation processing result by the channel estimation value, and the interference replica is subtracted from the received signal.
- spreading codes other than the spreading code assigned to the own device become interference codes.
- the MUDs 31 to 38 perform a process of subtracting the interference replica from the received signal for all the interference codes to obtain a desired demodulation data.
- FIG. 3 is a diagram showing the correspondence between the number of shifts of the common midamble from the reference time and the number of multiplexed spread codes.
- the MSs 21 to 28 receive the signal transmitted from the BS 11, detect the midamble shift included in the received signal, and multiplex the spread multiplexed on the transmission side corresponding to the detected midample shift.
- the number of codes is detected by referring to the table shown in Fig. 3.
- the MSs 21 to 28 perform correlation processing on the received signals using spreading codes unique to the respective MSs 21 to 28, combine the RAKEs, and add the RAKE combining results for a certain period of time. To calculate the symbol power.
- the spreading codes corresponding to the number of detected spreading codes are selected as interference codes in order from the one with the largest symbol power.
- the symbol power is about 1 for the spreading code multiplexed on the BS transmission signal and about 0 for the unmultiplexed spreading code.
- the selection result is notified to the MUDs 31 to 38 provided in the own device.
- the MUDs 31 to 38 generate interference replicas in the same manner as in the case of the individual medium-able, and perform a process of subtracting the interference replica from the received signal to obtain a desired demodulated data.
- transmission selection diversity In recent years, in a wireless communication system, space diversity has been adopted in which a base station apparatus has a plurality of antenna branches to secure a plurality of paths. As one of the space diversity, there is a selection diversity for selecting an optimum antenna branch according to a propagation state.
- transmission selection diversity the technique of using selection diversity on the transmitting side is referred to as transmission selection diversity.
- This transmission selection diversity can transmit a signal by selecting a propagation path having the best propagation environment from a plurality of propagation paths, so that the influence of fading can be reduced.
- the transmission selection diversity is applied to a conventional CDMA wireless communication system that adopts a common midamble as a known signal and the BS wirelessly communicates with the MS equipped with the MUD using the CDMA method, Since it is unknown whether the signal was transmitted from the antenna branch, the channel estimation value of the signal multiplied by the interference code cannot be calculated, and the interference repli- cation power cannot be generated. Disclosure of the invention
- An object of the present invention is to apply a transmission selection diversity to a CDMA wireless communication system in which a BS adopts a common midamble as a known signal and a BS wirelessly communicates with an MS equipped with an MUD in a CDMA scheme, thereby enabling other users to transmit. It is an object of the present invention to provide a wireless communication terminal device and an interference canceling method capable of reducing the influence of interference and fading from the mobile terminal.
- a wireless communication terminal device is a wireless communication terminal device that performs wireless communication by a CDMA method with a base station device that includes a plurality of antenna branches and performs transmission selection diversity, and Symbol power calculating means for calculating the symbol power of the spread code other than the assigned spreading code for each antenna branch, and detecting the number of interference codes for each antenna branch by referring to the common known signal included in the received signal Means for detecting the number of interference codes, and an interference code for selecting, for each antenna branch, the number of interference codes corresponding to the number of interference codes detected by the detection means with reference to the symbol power calculated by the symbol power calculation means. Selecting means; and an interference canceller for removing interference due to the interference code selected by the interference code selecting means.
- an interference cancellation method includes: a step of receiving a signal transmitted by a CDMA method from a base station apparatus having a plurality of antenna plants and performing transmission selection diversity; Calculating the symbol power of the spreading code other than the code for each antenna branch, detecting the number of interference codes for each antenna branch by referring to a common known signal included in the received signal, and calculating the symbol power And selecting the same number of interference codes as the number of interference codes detected for each antenna branch, and removing interference caused by the selected interference code.
- Figure 1 is a diagram showing a conventional CDMA wireless communication system in which a base station device performs wireless communication with a wireless communication terminal device equipped with an MUD using the CDMA method.
- FIG. 2 is an explanatory diagram showing a procedure for creating a medium ampoule in a CDMA wireless communication system.
- Figure 3 shows the correspondence between the number of shifts of the common midamble from the reference time and the number of multiplexed spread codes.
- FIG. 4 is a block diagram showing a CDMA wireless communication system according to one embodiment of the present invention.
- FIG. 5 is a block diagram illustrating a configuration of a wireless communication terminal device according to an embodiment of the present invention.
- FIG. 6A is a diagram showing the correspondence between the number of shifts of the common midamble from the reference time and the number of spread codes of the antenna branch.
- FIG. 6B is a diagram showing the correspondence between the number of shifts of the common midamble from the reference time and the number of spread codes of the other antenna branches 103, and
- FIG. 7 is a diagram illustrating a calculation result of the symbol power for each path.
- An object of the present invention is to provide a cellular system including a base station apparatus having a plurality of antenna branches and performing transmission selection diversity and a wireless communication terminal apparatus performing wireless communication with the base station apparatus.
- the antenna uses the symbol power of all spreading codes except for the spreading code assigned to its own device as an antenna.
- FIG. 4 is a process diagram showing a CDMA wireless communication system according to an embodiment of the present invention.
- a known signal is transmitted between a base station apparatus (BS) performing transmission selection diversity and a wireless communication terminal apparatus (MS) equipped with a multi-user interference canceller (MUD) in a cellular system.
- BS base station apparatus
- MS wireless communication terminal apparatus
- M multi-user interference canceller
- wireless communication is performed by the CDMA method using a common midamble.
- Transmission selection diversity is one type of space diversity in which a base station apparatus has a plurality of antenna branches to secure a plurality of propagation paths, and a selection diversity scheme for selecting an optimum antenna branch according to a propagation state.
- the common midamble is a midamble common to all wireless communication terminal devices.
- the common midamble is configured as shown in Fig. 2, and the number of shifts from the reference time is associated with the number of spread codes multiplexed on the signal transmitted in each antenna branch.
- the BS 101 includes an antenna branch 102 and an antenna branch 103, and the MS 111— :! Performs wireless communication with ⁇ 111-10 in CDMA system.
- CDMA radio communication system shown in FIG. 4 for example, 16 spreading codes (spreading code # 1 to spreading code # 16) are used. Therefore, BS 101 can accommodate up to 16 users.
- spreading code # 1 is assigned to MS 111-11
- spreading codes # 2 to # 16 are assigned to any of MS 111-2 to 111-11.
- BS 101 selects the optimum antenna branch for each MS by transmission selection diversity, and multiplexes and transmits the signals of the selected MSs with the same antenna branch. In the present embodiment, a common mitten amble is used as a known signal.
- the BS 101 adds a common midamble to the midamble section provided between the data sections to form transmission signals for each of the MSs 111-1 to 111-10.
- Each of the transmission signals is orthogonal to each other.
- the multiplication is performed by multiplying by the spreading code to be transmitted and transmitted to each MS 111-1 to L11-10. That is, a plurality of spreading codes are multiplexed in the transmission signal of BS101.
- FIGS. 6A and 6B the number of shifts of the common midamble (Mitsudoor Is associated with the number of spread codes multiplexed, so that the signal transmitted from each antenna branch corresponds to the number of spread codes multiplexed on the signal transmitted from that antenna branch.
- a midamble of the number of shifts (mid ampoule shift) to be added is added.
- FIG. 6A shows the correspondence between the number of spreading codes multiplexed on the signal transmitted from antenna branch 102 and the number of midamble shifts (midamble shift)
- FIG. 6B shows the transmission from antenna branch 103.
- the figure shows the correspondence between the number of spreading codes multiplexed in a given signal and the number of shifts of the mid ampoule (midamble shift). Since FIGS.
- each of MSs 111-1 to 111-110 receives the signal by detecting the midamble shift. It is possible to know candidates for the number of spreading codes multiplexed on the signal. Note that, in the present embodiment, a case has been described where BS 101 is provided with two antenna branches, but the number of antenna branches may be any number. Further, the number of MSs accommodated in the cell of BS 101 can be appropriately changed in the system. Further, the spreading factor used in the CDMA wireless communication system shown in FIG. 4 can be changed as appropriate.
- MS 111-1 ⁇ : L11-10 have MUD each.
- MS 111-11: L11-10 receive the signal transmitted from BS 101, and all of the spreading codes multiplexed on the received signal other than the spreading code assigned to the own device.
- the symbol power of each antenna branch is calculated for each antenna branch, and a spread code that causes interference for each antenna branch is selected with reference to the calculated symbol power and a common midample included in the received signal, and interference due to the selected spread code is selected. Is reduced using MUD.
- Figure 5 shows the configuration of MSI 11-1.
- the configuration of MSI 11-2 to 111-10 is the same as the configuration of MS 111-; I.
- MSll— U, a radio reception unit that performs predetermined radio reception processing such as A / D conversion on a signal received by an antenna 201. 2, and the antenna power of BS 101 provided in BS 101 and the symbol power of all spread codes other than the spread code assigned to the own device among the 16 spread codes used in the system.
- a symbol power calculation unit 150 calculated for each of the 103, an antenna branch selection unit 207 for comparing the symbol power for each antenna branch, and selecting an antenna branch having the largest comparison result,
- a code number detector 208 for detecting a candidate for the number of spreading codes corresponding to the doamble shift, and an interference code selector 209 for selecting an interference code from the spreading codes multiplexed in the received signal.
- an MUD 210 that reduces interference by subtracting an interference replica from the received signal.
- the symbol power calculation unit 150 uses a shift number measuring unit 203 that measures the number of shifts (midamble shift) of the midamble included in the received signal from the reference time, and a midamble included in the received signal.
- a RAKE combining unit 206 that obtains symbol power by RAKE combining the correlation processing result in the correlation processing unit 205 and adding the RAKE combining result over a predetermined period. .
- the processing system from the correlation processing unit 205 to the RAKE combining unit 206 has the same number as this spreading code in order to calculate symbol power for all 16 spreading codes used in the system. Only provided. That is, in this embodiment, 16 systems are provided.
- the symbol power calculation unit 150 is provided with the number of antenna branches used for transmission diversity of the base station apparatus, that is, the number of propagation paths (two in the present embodiment). 11-1 can calculate the symbol power of all 16 spreading codes used in the system for all antenna branches.
- the interference cancellation operation in the MS configured as described above will be described in detail. Since the operation in each MS is the same, here the operation of MS 1 1 1 1 1 An example is described.
- signals destined for each of MS 111-1-1 to 11-11-10 are multiplexed with signals of which the same antenna branch has been selected by transmission selection diversity, and transmitted.
- a midamble of the number of shifts (midample shift) corresponding to the number of multiplexed spreading codes is added to this transmission signal. This correspondence is shown in Figures 6A and 6B.
- the reception signal received by the antenna 201 is subjected to predetermined radio reception processing by the radio reception section 202, and the shift number measurement section 203 and the correlation processing section 2 are performed. 0 is output to 5.
- the shift number measuring section 203 measures the number of shifts (midamble shift) of the common midamble included in the received signal.
- channel estimation is performed with reference to the midamble, and the channel estimation value is output to the RAKE combining section 206.
- the correlation processing unit 205 performs a correlation process of multiplying each of the 16 spreading codes used in the system by the above processing to obtain received symbols.
- the RAKE combining section 206 performs complex detection by complexly multiplying the received symbol by the channel estimation value, and RAKE combines the received symbol.
- the RAKE synthesis results are added over a predetermined period to obtain symbol power.
- the symbol power indicates the correlation between the multiplied spreading code and the received signal.
- the symbol power is normalized, and is approximately 1 for spread codes multiplexed in the BS transmission signal because of high correlation, and is approximately 0 for unmultiplexed spread codes because of low correlation.
- the symbol power is output to the respective antenna branch selector 207.
- the symbol power calculated for each antenna branch for the 16 spreading codes used in the system is compared for each spreading code, and the antenna branch with the largest symbol power is determined for that antenna. It is selected as the antenna branch that transmitted the signal obtained by multiplying the spreading code.
- the selection result of the antenna branch is output to the code number detection unit 208.
- the code number detector 208 detects the number of multiplexed spread codes corresponding to the number of midamble shifts measured in the shift number measuring unit 203 with reference to FIGS. 6A and 6B. Candidates are detected.
- FIGS. 6A and 6B are diagrams showing the correspondence between the number of shifts of the common midamble from the reference time and the number of spread codes multiplexed on the signal transmitted on each antenna branch. Of the spreading codes multiplexed on the signal transmitted from each antenna branch, all spreading codes other than the spreading code assigned to the own device cause interference.
- the number of interference codes multiplexed in the signal transmitted from the antenna branch selected as the transmission source of the signal obtained by multiplying the spread code assigned to the own apparatus by the antenna branch selection unit 207 is The number is obtained by subtracting the number of spreading codes allocated to the own device from the total number of multiplexed spreading codes.
- the number of interference codes multiplexed on signals transmitted from antenna branches not selected as the transmission source of the signal obtained by multiplying the spread code assigned to the own device is the total number of multiplexed spread codes. Is the same as
- the number of interference codes multiplexed on the signal transmitted from antenna branch 102 is determined by the number of spread codes allocated to the own device from the total number of spread codes multiplexed on the signal transmitted from antenna branch 102. Is the number after subtracting
- the number of interference codes multiplexed on the signal transmitted from antenna plan 103 is the exact number of spread codes multiplexed on the signal transmitted from antenna branch 103.
- the interference code selection unit 209 refers to the candidate of the interference code number selected in the code number detection unit 208 and compares the symbol powers calculated for the 16 spread codes used in the system. In the system An interference code is selected from all the spreading codes used. This selection is made for each antenna branch.
- FIG. 7 is a diagram showing the calculation result of the symbol power for each path.c
- the number of shifts of the mid ampoule included in the signal transmitted from the antenna branch 102 is 0, and the antenna branch 10 It is assumed that the number of shifts of the midamble included in the signal transmitted from 3 is 5.
- the number of multiplexed spreading codes is one of 1, 5, 9, and 13, and according to FIG. 6B, when the number of shifts is 5, multiplexing is performed.
- the number of spread codes is one of 2, 6, 10 and 14.
- spreading code # 3 spreading code # 4, spreading code # 6, spreading code # 10, spreading code # 11, spreading code # 12, spreading code # Regarding 14 and spreading code # 15, the symbol power of antenna branch 102 is large.
- spreading code # 2 spreading code # 5, spreading code # 7, spreading code # 8, spreading code # 9, spreading code # 13, and spreading code # 16, antenna branch 103 is used. Symbol power is increasing.
- the antenna branch selector 2 07 sets the spreading code # 3, The signal obtained by multiplying spreading code # 4, spreading code # 6, spreading code # 10, spreading code # 11, spreading code # 12, spreading code # 14, and spreading code # 15 is the antenna branch 1 ⁇ 2 Judgment was sent from. That is, for these spread codes, antenna branch 102 is selected as the source.
- the signal obtained by multiplying spreading code # 2, spreading code # 5, spreading code # 7, spreading code # 8, spreading code # 9, spreading code # 13, and spreading code # 16 is the antenna branch. Judge that it was sent from 103. That is, for these spread codes, antenna branch 103 is selected as the transmission source.
- the interference code selection unit 209 determines that the symbol power of the spreading code # 3, the spreading code # 6, the spreading code # 11, and the spreading code # 12 among the spreading codes from which the antenna branch 102 has been selected is close to 1. Since the other spreading codes take values close to 0, taking into account that 4 is included in the candidate number of interference codes, these four spreading codes (spreading code # 3, spreading code # 6, spreading code # 11, and spreading code # 12) are selected as interference codes multiplexed on the signal transmitted from antenna branch 102. Referring to FIG. 6, there are 0, 8, and 12 in addition to 4 as candidates for the number of interference codes, but 8 spreading codes for which antenna branch 102 is selected, that is, spreading code # 3, spreading code # 3.
- spreading code # 6 spreading code # 10, spreading code # 11, spreading code # 12, spreading code # 14, and spreading code # 15, spreading code # 3, spreading code # 6, spreading code
- the symbol power of # 11 and spreading code # 12 is about 1, and the other spreading code # 4, spreading code # 10, spreading code # 14, and spreading code # 15 have symbol power of about 0.
- 4 can be easily selected from the candidates.
- the symbol powers of spreading codes # 5 and # 16 take values close to 1 and the other spreading codes take values close to 0.
- the number of interference code candidates includes 2. Therefore, the two spreading codes (spreading code # 5 and spreading code # 16) are selected as interference codes multiplexed on the signal transmitted from antenna branch 103. Also in this case, there is no room to select other than 2 as the number of interference codes.
- the present invention is not limited to this, and three or more antenna branches may be provided. Even when three or more antenna branches are provided, an interference code can be selected in a similar manner.
- the MUD 210 can know, for each antenna branch, which spreading code is the interference code among all the spreading codes used in the system by the output of the interference code selection unit 209.
- the MUD 210 performs correlation processing on the received signal using the spreading code selected as the interference code, and then transmits a signal obtained by multiplying the correlation processing result by the interference code.
- a complex multiplication of the channel estimation value of the propagation path corresponding to the antenna branch compensates for the distortion in the line to generate a replica of the demodulation data of the interfering station (interference replica). The effect of interference is reduced by subtracting from the
- the MS calculates the symbol power of the spreading code other than the spreading code assigned to its own device for each antenna branch, and based on the calculated symbol power.
- a multi-user type (MUD) is used as an interference canceller.
- the present invention is not limited to this. It may be a user type.
- the present invention relates to an interference canceller for reducing the influence of interference from other stations in a wireless communication system using a CDMA system, and can be applied particularly to a multi-user type interference canceller.
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Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP01963421A EP1233559A4 (en) | 2000-09-06 | 2001-09-05 | TERMINAL FOR TRANSMISSION AND METHOD FOR SUPPRESSING INTERFERENCE |
AU2001284423A AU2001284423A1 (en) | 2000-09-06 | 2001-09-05 | Radio communication terminal and interference canceling method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2000269984A JP3672808B2 (ja) | 2000-09-06 | 2000-09-06 | 無線通信端末装置及び干渉キャンセル方法 |
JP2000-269984 | 2000-09-06 |
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WO2002021745A1 true WO2002021745A1 (fr) | 2002-03-14 |
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PCT/JP2001/007676 WO2002021745A1 (fr) | 2000-09-06 | 2001-09-05 | Terminal de radio communication et procede de suppression de l'interference |
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US (1) | US20020163896A1 (ja) |
EP (1) | EP1233559A4 (ja) |
JP (1) | JP3672808B2 (ja) |
CN (1) | CN1167221C (ja) |
AU (1) | AU2001284423A1 (ja) |
WO (1) | WO2002021745A1 (ja) |
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US8888643B2 (en) | 2010-11-10 | 2014-11-18 | Fallbrook Intellectual Property Company Llc | Continuously variable transmission |
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- 2001-09-05 CN CNB018026540A patent/CN1167221C/zh not_active Expired - Fee Related
- 2001-09-05 US US10/111,997 patent/US20020163896A1/en not_active Abandoned
- 2001-09-05 WO PCT/JP2001/007676 patent/WO2002021745A1/ja not_active Application Discontinuation
- 2001-09-05 AU AU2001284423A patent/AU2001284423A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
---|---|
CN1167221C (zh) | 2004-09-15 |
JP2002084214A (ja) | 2002-03-22 |
JP3672808B2 (ja) | 2005-07-20 |
AU2001284423A1 (en) | 2002-03-22 |
EP1233559A1 (en) | 2002-08-21 |
EP1233559A4 (en) | 2005-12-28 |
CN1389040A (zh) | 2003-01-01 |
US20020163896A1 (en) | 2002-11-07 |
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