WO2000077953A1 - Recepteur radio et procede de reception adaptatif - Google Patents
Recepteur radio et procede de reception adaptatif Download PDFInfo
- Publication number
- WO2000077953A1 WO2000077953A1 PCT/JP2000/003790 JP0003790W WO0077953A1 WO 2000077953 A1 WO2000077953 A1 WO 2000077953A1 JP 0003790 W JP0003790 W JP 0003790W WO 0077953 A1 WO0077953 A1 WO 0077953A1
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- WO
- WIPO (PCT)
- Prior art keywords
- tap coefficient
- array
- replica
- signal
- unit
- Prior art date
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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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
-
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
Definitions
- the present invention relates to a wireless receiving apparatus and an adaptive receiving method, and more particularly to a wireless receiving apparatus used for mobile communication and using a data array antenna "7" (Adaptive Array Antenna) and an adaptive receiving method thereof.
- Background art Adaptive Array Antenna
- the conventional radio receiving apparatus estimates the tap coefficient used for array combining and the tap coefficient used for equalization processing collectively.
- FIG. 1 is a block diagram showing a schematic configuration of a conventional radio receiving apparatus.
- FIG. 2 is a block diagram showing a schematic configuration of an array combining section of the conventional radio receiving apparatus.
- FIG. 3 is a block diagram showing a conventional radio receiving apparatus.
- FIG. 4 is a block diagram illustrating a schematic configuration of a feed-forward filter (FFF) of a receiving apparatus.
- FIG. 4 is a block diagram illustrating a schematic configuration of a maximum likelihood sequence estimating unit of a conventional wireless receiving apparatus.
- FIG. 6 is a block diagram illustrating a schematic configuration of a replica generation unit of a conventional wireless receiving device.
- FIG. 6 is a block diagram illustrating a schematic configuration of a tap coefficient estimating unit of the conventional wireless receiving device.
- an adaptive array and antenna 1 receive a radio signal
- an array combining unit 2 receives a signal from each antenna, performs a weighting process, and combines the signals. Details will be described later.
- the subtracter 3 subtracts a replica signal generated by a repli- cation force generator 9 described later from the received signal subjected to the array synthesis processing. The result of the subtraction is used as likelihood information when a tap coefficient estimating unit 4 to be described later calculates a tap coefficient at the time of array combining processing.
- the tap coefficient estimating unit 4 calculates tap coefficients at the time of array combining and evening coefficients at the time of generating a repli-force signal, using the outputs of the subtractor 3 and a subtractor 5 described later as likelihood information. Details will be described later.
- the subtractor 5 subtracts a replica signal generated by a repli- cation force generation unit 9 described later from the received signal subjected to the array synthesis processing.
- the subtraction result is used as likelihood information when calculating a tap coefficient at the time of generating a replica signal in a tap coefficient estimator 4 described later.
- Maximum likelihood sequence estimation section 6 uses the output of subtracter 5 as likelihood information to determine a received signal using a video algorithm and outputs a symbol sequence candidate.
- the memory 7 holds the known signal, and the switch 8 outputs the known signal stored in the memory 7 to the replica generator 9 at the time of tap coefficient estimation using the known signal, based on the symbol synchronization timing. At this time, a symbol sequence candidate of the received signal is output to the replica generator 9. Note that the symbol synchronization timing can be obtained from any one of the reception processing units.
- the replica generator 9 multiplies the known signal or the symbol sequence candidate of the received signal by the tap coefficient estimated by the tap coefficient estimator 4 to generate a replica signal. Details will be described later.
- a reception processing unit 11 performs reception processing on a signal received from each antenna, and a multiplier 12 applies a tap coefficient indicated by a tap coefficient estimation unit 4 to each signal subjected to the reception processing.
- the multiplier 13 adds all the multiplier outputs, and the FFF 14 absorbs the timing jitter and the out-of-synchronization of the combined received signal. Details will be described later.
- the configuration of the FFF 14 will be described with reference to FIG. In FIG.
- the delay unit 21 is a delay unit that delays the input signal by TZM time corresponding to 1 ZM (M is an arbitrary natural number) of the symbol period T, and the multiplier 22 receives the signal.
- Each signal is multiplied by the tap coefficient specified by the tap coefficient estimator 4 and weighted, and the combiner 23 adds all the multiplier outputs, and performs timing and synchronization of the received signal. Absorb the deviation and output.
- a power calculator 31 calculates the power value by squaring the output of the subtracter 5.
- M L S ⁇ .Maximum Likelihood Sequence Estimation) ⁇ 3 2 ⁇ Ma, ⁇ ⁇ ;? (Add Compare Select) Processing unit 33 and memory 34.
- the ACS processing unit 33 adds the result (path metric value) obtained by adding the input value to the previous value stored in the memory 34 for the number of states (this storage area is assumed to be A).
- the path metric values in each state are compared in magnitude, and the smallest value is stored in the area A in the memory 34.
- the output is the path metric value selected in each state.
- a delay unit 41 is a delay unit for delaying an input known signal or a symbol sequence candidate by a symbol period T time, and a multiplier 42 estimates tap coefficients for each input signal taken in. The tap coefficients instructed by the unit 4 are multiplied respectively, and weighted, and the combiner 43 adds all the multiplier outputs and outputs a replica signal.
- the multiplier 51 multiplies the output signal of the subtracter 3 by a correction coefficient held in the memory 52, and the multiplier 53 multiplies the output signal of the reception processor 11 by the multiplier 5
- the output of the multiplier 51 is multiplied by the output of the multiplier 51.
- An object of the present invention is to provide a radio receiving apparatus that reduces the time required for tap coefficient convergence and prevents transmission efficiency from deteriorating, and a method for estimating the tap coefficient thereof.
- the subject of the present invention is to provide a tap coefficient estimating unit for each specific function so that tap coefficient estimation is not performed collectively, thereby shortening the time required for tap coefficient convergence and preventing transmission efficiency deterioration. That is.
- FIG. 2 is a block diagram showing a schematic configuration of an array combining unit of a conventional wireless receiving device
- FIG. 3 is a block diagram showing a schematic configuration of an FFF of the conventional wireless receiving device
- FIG. 10 is a block diagram showing a schematic configuration of a wireless receiving apparatus according to Embodiment 2 of the present invention.
- FIG. 11 is a block diagram showing a schematic configuration of a wireless receiving apparatus according to Embodiment 3 of the present invention.
- FIG. 12 is a block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 4 of the present invention.
- FIG. 13 is a block diagram showing a schematic configuration of a second tap coefficient estimating unit of the wireless receiving apparatus according to Embodiment 4 of the present invention.
- FIG. 14 is a block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 5 of the present invention.
- FIG. 15 is a block diagram showing a schematic configuration of a first tap coefficient estimating unit of the wireless receiving apparatus according to Embodiment 5 of the present invention.
- FIG. 16 is a block diagram showing a schematic configuration of a wireless receiving apparatus according to Embodiment 6 of the present invention.
- FIG. 17 is a block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 7 of the present invention.
- FIG. 18 is a block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 2 of the present invention.
- FIG. 19 is a block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 9 of the present invention
- FIG. 20 is a block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 10 of the present invention
- FIG. 21 is a block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 11 of the present invention.
- FIG. 22 is a block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 12 of the present invention.
- FIG. 23 is a block diagram showing a schematic configuration of the radio receiving apparatus according to Embodiment 13 of the present invention.
- the radio receiving apparatus has two tap coefficient estimating units.
- FIG. 7 is a block diagram illustrating a schematic configuration of the wireless reception device according to Embodiment 1 of the present invention.
- FIG. 8 is a block diagram of a first tap coefficient estimating unit of the wireless reception device according to Embodiment 1 of the present invention.
- FIG. 9 is a block diagram showing a schematic configuration, and FIG. 9 is a block diagram showing a schematic configuration of a second sunset coefficient estimating unit of the wireless receiving apparatus according to Embodiment 1 of the present invention.
- the subtractor 103 subtracts a replica signal generated by a replica generator 110 described later from the received signal subjected to the array synthesis processing.
- the result of the subtraction is calculated by a first tap coefficient estimator 104 described later to calculate the tap coefficient at the time of the array synthesis processing. It is used as an overnight param when it is issued.
- the second tap coefficient estimating section 107 uses the output of the subtracter 105 as a parameter to calculate the evening tap coefficient when the replica signal is generated. Details will be described later.
- the memory 108 holds the known signal, and the switch 109 reads the known signal stored in the memory 108 at the time of tap coefficient estimation using the known signal based on the symbol synchronization timing. In other cases, the symbol sequence candidates of the received signal are output to the replica generator 110. Note that the symbol synchronization timing can be obtained from any one of the reception processing units.
- the replica generator 110 multiplies the symbol sequence candidates of the known signal or the received signal by the tap coefficients estimated by the second tap coefficient estimator 107 to generate a repli- cation signal. Since the configuration of the replica generator 110 is the same as that of the conventional example, a detailed description is omitted.
- a multiplier 201 multiplies an output signal of a subtractor 103 by a correction coefficient held by a memory 202.
- the correction coefficient is a weighting coefficient that determines the correction width. If the error is large immediately after the start of estimation, the value is set to a large value, and is set to a small value as the error decreases.
- the multiplier 203 multiplies the output signal of the reception processing unit of the array synthesis unit 102 by the output of the multiplier 201, and the multiplier 204 generates the output of the FFF of the array synthesis unit 102.
- the signal is multiplied by the output of the multiplier 201.
- the memory 205 manages addresses and holds A tap coefficients l to n and F tap coefficients l to n.
- n does not mean that the number of A tap coefficients and the number of F tap coefficients are the same. That is, there can be A tap coefficients 1 to 8 and F tap coefficients 1 to 3. The same applies to the following description.
- the subtractor 206 subtracts the output of the multiplier 203 from the A tap coefficients l to n held in the memory 205, and the subtracter 207 subtracts the F tap held in the memory 205.
- the output of the multiplier 204 is subtracted from the coefficients l to n.
- the conjugate unit 208 conjugates the input signal, that is, outputs the in-phase component as it is, and outputs the quadrature component with its sign inverted.
- the tap coefficients newly calculated in this way are output to the multiplier of the array synthesizing unit 102, and the F tap coefficients are output to the FFF of the array synthesizing unit 102, respectively.
- the memory update unit 209 writes the calculated new tap coefficient into the memory 205, and updates each accumulated tap coefficient to the latest one.
- the multiplier 301 multiplies the output signal of the subtractor 105 by the correction coefficient held by the memory 302, and the multiplier 303 sets each tap of the replica generator 110.
- the input signal is multiplied by the output of the multiplier 301.
- the memory 304 manages addresses and holds R tap coefficients l to n.
- the subtractor 305 subtracts the output of the multiplier 303 from the R tap coefficients l to n stored in the memory 304.
- the conjugate unit 306 conjugates the input signal, that is, outputs the in-phase component as it is, and outputs the quadrature component with its sign inverted.
- the newly calculated R tap coefficient is output to the multiplier of replica generation unit 110.
- the memory updating unit 307 writes the calculated new tap coefficient into the memory 304 and updates the stored R tap coefficient to the latest one.
- the radio signal received by the adaptive array antenna 101 is subjected to reception processing for each antenna in an array combining section 102, weighted by an A tap coefficient, and combined.
- the combined reception signal is passed through the FFF to absorb timing jitter and synchronization deviation.
- An error of the array-combined received signal with respect to the replica signal is calculated by a subtractor 103, and this error is used as a parameter for operating an adaptive alcohol 'list' in a first tap coefficient estimator 104.
- the A tap coefficient and the F tap coefficient in the array synthesizing unit 102 are appropriately updated by the first tap coefficient estimating unit 104.
- the array synthesizing unit 102 outputs a received signal relating to the current A tap coefficient and F tap coefficient to the first tap coefficient estimating unit 104, and the first tap coefficient estimating unit 104 stores the received signal in the memory 205.
- the error between the combined received signal and the replica signal output from the subtractor 103, and the correction coefficient held in the memory 202 a new The new A and F tap coefficients are estimated (Equation 1).
- the estimated new A and F tap coefficients are output to the memory 205 and the array combining unit 102 of the first evening coefficient estimating unit 104, and the A and F tap coefficients of the array combining unit 102 are output. Is updated.
- replica generating section 110 outputs a signal relating to the current R tap coefficient to second tap coefficient estimating section 107, and second tap coefficient estimating section 107 outputs the signal, a correction coefficient in memory 302, and a memory
- the current R tap coefficient at 304 Using the output of the subtracter 105 (error), a new R tap coefficient is estimated (Equation 1).
- the estimated new R tap coefficient is output to the memory 304 and the replica generator 110, and the R tap coefficient in the replica generator 110 is updated.
- the error between the received signal after array synthesis and the replica signal calculated by the subtractor 105 is used as likelihood information when the received signal is determined by the maximum likelihood sequence estimator 106.
- the received signal determined using the video algorithm is output as a symbol sequence candidate.
- each tap coefficient estimating unit has been described using LMS, which is a type of adaptive alcohol 'list', but the present invention is not limited to this.
- the radio receiving apparatus has the same configuration as that of the eighth embodiment, except that if the error between the received signal subjected to the array synthesis processing and the replica signal is large, the received signal based on the array sequence Are ignored in the demodulation process.
- FIG. 19 is a block diagram showing a schematic configuration of the radio receiving apparatus according to Embodiment 9 of the present invention.
- the same components as those in the eighth embodiment are denoted by the same reference numerals, and the detailed description is omitted.
- the switching of the switch 13 01 is controlled by the error determination unit 12 01, and when the error determination unit 12 0 1 determines from the output of the subtractor 10 3 that the error is large, the array
- the switch 1301 provided in the sequence is opened, and the received signal received by the array sequence is not used for the combining process in the combiner 401 and is ignored from the demodulation process.
- the radio receiving apparatus has a configuration similar to that of the sixth embodiment, except that diversity is performed between array sequences.
- FIG. 20 is a block diagram showing a schematic configuration of the radio receiving apparatus according to Embodiment 10 of the present invention.
- the same components as those in Embodiments 4 and 6 are denoted by the same reference numerals, and detailed description will be omitted.
- a multiplier 600 is a multiplier of the fourth embodiment described with reference to FIG. As in the case, the output signal of each array combining unit is weighted.
- the second tap coefficient estimator 1401 estimates not only the R tap coefficient but also the D tap coefficient.
- the radio receiving apparatus has a configuration similar to that of the seventh embodiment, except that diversity is performed between array sequences.
- FIG. 21 is a block diagram showing a schematic configuration of the radio receiving apparatus according to Embodiment 11 of the present invention.
- the same components as those in Embodiments 5 and 10 are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the radio receiving apparatus has the same configuration as that of Embodiment 10, except that when the error between the array-combined received signal and the replica signal is large, the received signal based on the array sequence Are ignored in the demodulation process.
- FIG. 22 is a block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 12 of the present invention. .
- the same components as those in Embodiments 6 and 10 are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the error determination unit 1601 outputs the output of the subtractor 103 of each array sequence. If it is determined that the error is large by comparing the force with an arbitrary threshold value, the switch 1602 provided in the array sequence is opened, and the received signal of the array sequence becomes It is not used for the synthesis processing in the synthesizer 401 and is ignored from the demodulation processing.
- the radio receiving apparatus has the same configuration as that of Embodiment 12, except that when the error between the received signal subjected to the array synthesis processing and the replica signal is small, the tap determined by the training processing is used.
- the coefficient is a fixed value.
- FIG. 23 is a block diagram showing a schematic configuration of the wireless receiving apparatus according to Embodiment 13 of the present invention.
- the same components as those in Embodiments 8 and 12 are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the array combining section 1 Estimate the A tap coefficient based on the multiplier input signal at 02.
- the error determination unit 1601 compares the output of the subtractor 103 of each array series with an arbitrary threshold, and determines that the error is sufficiently small. 1202 and 1203 are released, and the tap coefficients calculated by the first tap coefficient estimator 1002 for each array sequence during training processing are used as fixed values during tracking processing. .
- the switches 122 and 123 are closed, and the first tap coefficient estimating unit 1002 calculates each array sequence during the training process.
- the obtained evening coefficient is used as the initial value of the evening coefficient estimation during tracking processing.
- the radio receiving apparatus of the present invention receives a radio signal in a plurality of branches, weights the received signal, and synthesizes the received signal, a replica generation unit that generates a replica signal from a symbol sequence candidate, A first tap coefficient estimator for estimating and updating tap coefficients in the array synthesizer based on an error obtained by subtracting the replica signal generated by the replica generator from the output signal of the array synthesizer. And a second tap coefficient estimator for estimating and updating a tap coefficient in the replica generator based on the error.
- the wireless receiving apparatus of the present invention in the above configuration, includes a plurality of arrays of the array combining section, the first tap coefficient estimating section is provided for each array combining section, and the output signal of each array combining section is combined to obtain a reception signal. Is adopted.
- the radio receiving apparatus of the present invention in the above configuration, employs a configuration in which the replica generation unit includes: a plurality of replica generation units; and a synthesis unit that synthesizes outputs of all the replica generation units. According to this configuration, since error estimation is performed using a plurality of replica signals, a plurality of interference waves can be removed.
- the first tap coefficient estimating unit estimates a tap coefficient using a reciprocal of a correlation value between a known signal held in advance and a received signal received in any of the branches as an initial value. Is adopted.
- the initial value of the F tap coefficient is given at the start of the FFF processing, so that the tap coefficient convergence time can be reduced.
- the replica generation unit has a plurality of repli- cation force generation units, and each of the first and second sunset coefficient estimation units is a dedicated one.
- a configuration having a replica generation unit is adopted.
- the array combining section may use the tap coefficients estimated by the first tap coefficient estimating section as an initial value at the time of the training processing, and estimate by the second tap coefficient estimating section at the time of the tracking processing.
- a configuration using the tap coefficients obtained is adopted.
- the tap coefficient estimation during the training process is performed by the replica generator and the sunset coefficient estimator provided for each array combining unit, and the sunset coefficient estimation during the tracking process is collectively performed. Since it is performed by the repli- cation force generator and the evening-up coefficient estimator, the amount of calculation can be reduced and the convergence time can be shortened.
- the array combining unit may initialize a tap coefficient estimated by a first tap coefficient estimating unit during a training process. Use a configuration that does not take a value. According to this configuration, when the error between the received signal subjected to the array synthesis processing and the replica signal is small, the tap coefficient determined by the training processing is used as the fixed tap coefficient in the tracking processing, so that the amount of calculation is reduced. , Shorten convergence time can do.
- the wireless receiving device of the present invention in the above configuration, further includes a diversity unit that performs weighting processing on the output signals of each array combining unit and combines the signals, and the second tap coefficient estimating unit estimates a weighting coefficient in the diversity unit. Use a configuration to update.
- the adaptive reception method of the present invention independently estimates a tap coefficient for array combining radio signals received on a plurality of branches and a tap coefficient for generating a replica signal.
- the estimation and updating of all the tap coefficients in the wireless receiver are not performed collectively, but are separately performed by two tap coefficient estimators, so that the time required for tap coefficient convergence is reduced, Transmission efficiency deterioration can be prevented.
- a tap coefficient when performing array synthesis for each array sequence is independently estimated.
- a tap coefficient for array combining radio signals received by a plurality of branches and a tap coefficient for generating a replica signal are independently estimated, and tracking is performed.
- a tap coefficient for array synthesis using the result of the training processing as an initial value And a tap coefficient for generating a replica signal are collectively estimated.
- the initial value of the F tap coefficient is given at the start of the FFF processing, so that the tap coefficient convergence time can be reduced.
- the adaptive reception method in the above method, when the difference between the array-combined received signal and the replica signal is larger than an arbitrary threshold, the array-combined received signal is demodulated. Avoid using it.
- a tap coefficient estimating unit is provided for each specific function so that the tap coefficient estimation is not performed collectively, so that the time required for tap coefficient convergence is reduced, and the transmission efficiency is reduced. Deterioration can be prevented.
- the present invention can be applied to a communication terminal device and a base station device in a digital wireless communication system. As a result, the time required for tap coefficient convergence is shortened, so that transmission efficiency degradation can be prevented.
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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- Mathematical Physics (AREA)
- Radio Transmission System (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
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Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU51087/00A AU5108700A (en) | 1999-06-16 | 2000-06-12 | Radio receiver and adaptive receiving method |
EP00935637A EP1126633A1 (en) | 1999-06-16 | 2000-06-12 | Radio receiver and adaptive receiving method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP11/169697 | 1999-06-16 | ||
JP11169697A JP2000357984A (ja) | 1999-06-16 | 1999-06-16 | 受信装置 |
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WO2000077953A1 true WO2000077953A1 (fr) | 2000-12-21 |
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PCT/JP2000/003790 WO2000077953A1 (fr) | 1999-06-16 | 2000-06-12 | Recepteur radio et procede de reception adaptatif |
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EP (1) | EP1126633A1 (ja) |
JP (1) | JP2000357984A (ja) |
AU (1) | AU5108700A (ja) |
WO (1) | WO2000077953A1 (ja) |
Families Citing this family (2)
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JP4170100B2 (ja) | 2003-01-10 | 2008-10-22 | 富士通株式会社 | 適応アンテナを用いる通信機 |
JP4664961B2 (ja) * | 2007-12-13 | 2011-04-06 | 富士通株式会社 | 適応アレーアンテナ・システム |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09260941A (ja) * | 1996-03-25 | 1997-10-03 | Y R P Ido Tsushin Kiban Gijutsu Kenkyusho:Kk | 受信装置および受信方法 |
JPH1013262A (ja) * | 1996-06-19 | 1998-01-16 | N T T Ido Tsushinmo Kk | アダプティブ・アレー受信機 |
JPH10233616A (ja) * | 1997-02-17 | 1998-09-02 | Y R P Ido Tsushin Kiban Gijutsu Kenkyusho:Kk | 受信方法および受信装置 |
JPH10336083A (ja) * | 1997-06-03 | 1998-12-18 | N T T Ido Tsushinmo Kk | アダプティブアレイ受信機 |
JPH1197921A (ja) * | 1997-09-24 | 1999-04-09 | Yrp Idou Tsushin Kiban Gijutsu Kenkyusho:Kk | 通信方法および通信装置 |
-
1999
- 1999-06-16 JP JP11169697A patent/JP2000357984A/ja active Pending
-
2000
- 2000-06-12 AU AU51087/00A patent/AU5108700A/en not_active Abandoned
- 2000-06-12 EP EP00935637A patent/EP1126633A1/en not_active Withdrawn
- 2000-06-12 WO PCT/JP2000/003790 patent/WO2000077953A1/ja not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09260941A (ja) * | 1996-03-25 | 1997-10-03 | Y R P Ido Tsushin Kiban Gijutsu Kenkyusho:Kk | 受信装置および受信方法 |
JPH1013262A (ja) * | 1996-06-19 | 1998-01-16 | N T T Ido Tsushinmo Kk | アダプティブ・アレー受信機 |
JPH10233616A (ja) * | 1997-02-17 | 1998-09-02 | Y R P Ido Tsushin Kiban Gijutsu Kenkyusho:Kk | 受信方法および受信装置 |
JPH10336083A (ja) * | 1997-06-03 | 1998-12-18 | N T T Ido Tsushinmo Kk | アダプティブアレイ受信機 |
JPH1197921A (ja) * | 1997-09-24 | 1999-04-09 | Yrp Idou Tsushin Kiban Gijutsu Kenkyusho:Kk | 通信方法および通信装置 |
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EP1126633A1 (en) | 2001-08-22 |
AU5108700A (en) | 2001-01-02 |
JP2000357984A (ja) | 2000-12-26 |
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