WO2011157229A1 - 天线间功率平衡方法及装置、基站 - Google Patents
天线间功率平衡方法及装置、基站 Download PDFInfo
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- WO2011157229A1 WO2011157229A1 PCT/CN2011/075911 CN2011075911W WO2011157229A1 WO 2011157229 A1 WO2011157229 A1 WO 2011157229A1 CN 2011075911 W CN2011075911 W CN 2011075911W WO 2011157229 A1 WO2011157229 A1 WO 2011157229A1
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- 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
- H04B7/0413—MIMO systems
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- 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
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
- H04B7/0465—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking power constraints at power amplifier or emission constraints, e.g. constant modulus, into account
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- 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
- H04B7/0682—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 using phase diversity (e.g. phase sweeping)
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- 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
- H04B7/0413—MIMO systems
- H04B7/0426—Power distribution
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- 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
- H04B7/0615—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 weighted versions of same signal
- H04B7/0619—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 weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
Definitions
- the present application claims to be filed on June 18, 2010 with the Chinese Patent Office, application number 201010207844.5, and the Chinese patent application entitled “Power Balance Method and Device between Antennas, Base Station” and in 2011
- the priority of the Chinese Patent Application No. 201110161960.2, entitled “Inter-antenna Power Balance Method and Apparatus, Base Station” is hereby incorporated by reference.
- the present invention relates to the field of wireless communication technologies, and in particular, to a method and device for balancing power between antennas, and a base station.
- WCDMA Wideband Code Division Multiple Access
- HSDPA High Speed Downlink Packet Access
- FIG. 1 is a schematic diagram of networking of MIMO and HSDPA in a primary tuner mode, where MIMO, Primary Common Pilot Channel (P-CPICH), HSDPA, and R99 are both single-shot and on two PAs.
- the signals of MIMO and HSDPA are all on one carrier frequency fl, only the signal of R99 is on the other carrier frequency G, and PA1 is the two frequencies of fl and G, and ⁇ 2 has only one frequency of fl, which leads to the power of the power amplifier PA1 and the power amplifier PA2. unbalanced.
- the antennas are The power balance is achieved by multiplying the output signal from a single antenna with an orthogonal Virtual Antenna Mapping (VAM) matrix to achieve the power balance of the two amplifiers.
- VAM Virtual Antenna Mapping
- Embodiments of the present invention provide a method and apparatus for balancing power between antennas, and a base station, so that signals output by the antenna generate different phases, so that different phases of the output signals enable HSDPA performance to generate fluctuations.
- an inter-antenna power balancing method including:
- An inter-antenna power balancing device including:
- a matrix processing module configured to multiply n virtual antenna signals by an orthogonal matrix to obtain n intermediate adjustment signals, where 1 is an integer > 2;
- phase rotation module configured to perform phase rotation on the m intermediate adjustment signals of the n intermediate adjustment signals by using a corresponding rotation phase, where m is an integer, and lmn, so that at least n physical antenna signals output through the antenna are There is a phase difference between the two physical antenna signals.
- a base station is also provided, including the above-described inter-antenna power balancing device.
- the technical solution provided by the foregoing embodiment is obtained by multiplying a virtual antenna signal by a VAM matrix.
- the signal is phase rotated so that the signals output by the antenna produce different phases, so that the different phases of the output signals can cause HSDPA performance to fluctuate.
- FIG. 1 is a schematic diagram of networking of MIMO and HSDPA in a primary tuner mode
- FIG. 2 is a flowchart of a power balance method between antennas according to an embodiment of the present invention
- FIG. 5 is a flowchart of a method for balancing power between antennas according to another embodiment of the present invention
- FIG. 6 is a schematic diagram of an antenna according to another embodiment of the present invention
- FIG. 7 is a schematic diagram of a left and right phase sweeping process in a power balance method between antennas according to another embodiment of the present invention
- FIG. 5 is a flowchart of a method for balancing power between antennas according to another embodiment of the present invention
- FIG. 6 is a schematic diagram of an antenna according to another embodiment of the present invention
- FIG. 7 is a schematic diagram of a left and right phase sweeping process in a power balance method between antennas according to another embodiment of the present invention
- FIG. 5 is a flowchart of a method for balancing power between antennas according to another embodiment of the present invention
- FIG. 6 is a schematic diagram of an antenna according to another embodiment of the present invention
- FIG. 7 is a schematic diagram of a left and right phase sweeping process in a power balance method
- FIG. 8 is a flowchart of a method for balancing power between antennas according to another embodiment of the present invention
- FIG. 9 is a schematic structural diagram of a power balance device between antennas according to an embodiment of the present invention
- FIG. 10 is a schematic diagram of a base station according to an embodiment of the present invention. Schematic diagram of the structure.
- FIG. 2 is a flowchart of a power balance method between antennas according to an embodiment of the present invention. As shown in Figure 2, the method can include:
- Step 21 Multiply the n virtual antenna signals by the orthogonal matrix to obtain n intermediate adjustment signals, where 1 is an integer of >2;
- VAM matrix ( ⁇ ⁇ ⁇ ⁇ ⁇ _ ⁇ ( ⁇ 1
- Sl, S2 is the output signal of the power amplifier, also known as the physical antenna signal.
- the VAM matrix By multiplying VI and V2 by the VAM matrix, the power is equally divided between the two physical antennas, that is, the power balance between PA1 and PA2 is achieved.
- the VAM matrix can be seen as part of the wireless channel and is invisible to the receiving end, so no changes need to be made to UE reception. It should be noted that the VAM matrix can be in various forms, and this embodiment is described by taking ⁇ as an example. Further, the above description has been made on the case of a dual antenna, and it is understood that the same applies to the case of other multiple antennas.
- Step 22 Perform phase rotation on the m intermediate adjustment signals of the n intermediate adjustment signals by using a corresponding rotation phase, where m is an integer, and lmn, so that at least two of the n physical antenna signals output through the antenna are There is a phase difference between the physical antenna signals.
- all the intermediate adjustment signals may be phase-rotated, or one or more of the intermediate adjustment signals may be phase-rotated by using a corresponding rotation phase, as long as there is a phase difference between the physical antenna signals output through the antenna.
- the phase difference of the physical antenna signals output through the antenna may be such that there is a phase difference between at least two physical antenna signals.
- the different phases of the output signals can cause fluctuations in HSDPA performance, so that HSDPA performance can be improved while maintaining power balance between the antennas.
- the phase rotation of the intermediate adjustment signal may be implemented by multiplying m intermediate adjustment signals as shown in FIG. 4, wherein ⁇ ⁇ is a rotation phase corresponding to the m intermediate adjustment signals. .
- phase used for phase rotation can be continuously updated within a range of 2 ⁇ , which may include: updating the value of ⁇ ⁇ in a 2 ⁇ period, and subsequently performing phase rotation on the m intermediate adjustment signals by using the updated ⁇ ⁇ .
- PhaseNum indicates the number of values of ⁇ ⁇ updated in a preset 2 ⁇ period. See the description of the embodiment shown in Figure 5 for details.
- the value of ⁇ ⁇ can be continuously updated.
- the method in this embodiment may further include the following steps:
- Step 23 Output the n physical antenna signals through an antenna.
- the raw channel quality indicates the CQI to select and lock an optimal phase for phase rotation. Specifically, it can include:
- Step 1 Obtain CQI statistics values for the locking decision reported by the user equipments in each phase; for example, average the CQIs reported in the same rotation phase in at least one 2 ⁇ cycle to obtain a CQI average value in the same rotation phase. ; CQI averaging over the same rotational phase is filtered to obtain CQI statistics for the lock decision at each rotational phase.
- Step 2 Find the largest CQI statistic value from the obtained CQI statistic value for the lock decision; for the lock judgment obtained by all the phases used for phase rotation in the current 2 ⁇ period Find the largest CQI statistic in the CQI statistic.
- Step 3 Determine whether to lock the phase corresponding to the largest CQI statistic value by using the CQI statistic value for the lock decision. If the optimal phase is found according to the largest CQI statistic, the optimal phase is the phase corresponding to the largest CQI statistic; the CQI statistic for the lock decision at each rotational phase in the current 2 ⁇ period will be averaged, Obtaining the first average value; the index value is [the index of the optimal phase minus the number of times the value of ⁇ ⁇ is updated within a 2 ⁇ period /4, the index of the optimal phase plus the value of updating ⁇ ⁇ in a 2 ⁇ period CQI statistic for the lock decision at the phase within /4], averaged to obtain a second average; CQI statistic for non-locking decision obtained by all phases used for phase rotation Averaged to obtain a third average value; the index value is [the index of the optimal phase minus the number of times the value of ⁇ ⁇ is updated in a 2 ⁇ period /4, the index of the optimal phase plus a ⁇ ⁇ in a
- the fourth average value and the third average value is greater than the unlock state determination threshold value
- the difference between the second average value and the first average value is greater than the lock state determination threshold value
- the fourth average value and the The difference between the three average values is greater than the lock state decision threshold value, and the optimal phase is locked.
- the phase adjustment of the m intermediate adjustment signals can be continued by using the locked optimal phase in the subsequent process, thereby further improving the HSDPA performance. See the description of the embodiment shown in Figure 6 for details.
- the technical solution provided by the foregoing embodiment performs phase rotation on the signal obtained by multiplying the virtual antenna signal and the orthogonal matrix, so that the signals output by the antenna generate different phases, and for the polarized antenna, the different phases of the output signals enable the HSDPA performance to be Fluctuations are generated to improve HSDPA performance while maintaining power balance between the antennas.
- FIG. 5 is a flowchart of a method for power balance between antennas according to another embodiment of the present invention.
- the dual antenna is taken as an example to illustrate that the phase rotation of only one of the virtual antenna signals and the orthogonal matrix is performed.
- the method may include the following content.
- Step 51 Rotate the phase ⁇ of the intermediate adjustment signal multiplied by the virtual antenna and the VAM matrix.
- the output signal shown in FIG. 4 as an example, the virtual antenna signals vl, V2 and such as 1 ⁇ intermediate VAM matrix obtained by multiplying the adjustment signal vl ten V 2, ⁇ vl- V of spin 2 ⁇ vl- ⁇ 2
- phase difference between the antenna signal s i and the physical antenna signal s2, which may improve the performance of the HSDPA.
- the phase rotation of ⁇ vl + ⁇ v2 may also be performed.
- the example is not limited to this.
- Step 52 Output a physical antenna signal through the antenna.
- the antenna Ant1 outputs the physical antenna signal s i
- the antenna Ant2 outputs the physical antenna signal s2 . Since there is a phase difference between the physical antenna signal si and the physical antenna signal s2, combined with a corresponding scheduling algorithm, such as a user with better scheduling performance (a Proportional-Fair (PF) scheduling algorithm can be used), thereby utilizing the user's
- PF Proportional-Fair
- the diversity gain may increase the throughput of the cell.
- the HSDPA performance can be improved by the corresponding scheduling algorithm.
- Step 53 Update the value of the phase ⁇ in a 2 ⁇ period, and then perform phase rotation on at least one intermediate adjustment signal of the plurality of intermediate adjustment signals by using the value updated ⁇ .
- phaseNum is the number of phases of the periodic rotation, which can be any natural number.
- the process of the phase adjustment can be referred to as phase cycle rotation.
- FIG. 6 is a flowchart of a power balance method between antennas according to another embodiment of the present invention.
- the method can include a training phase and a work phase.
- the phase rotation is performed in 2 ⁇ cycles, and the UE reception quality is counted.
- the training phase can include a 2 ⁇ period or multiple 2 ⁇ periods until an optimal phase is locked.
- the training phase ends and enters the working phase.
- a 2 ⁇ cycle is called a training cycle.
- This training phase increases the optimal phase search and lock state decisions based on the phase period rotation of the embodiment shown in FIG.
- the optimal phase is set, working according to the set working cycle, and continuing to enter the training phase after the working cycle.
- the training phase and the working phase can be performed on a periodic basis, and the length of the cycle can be set according to actual needs.
- the working phase can also be terminated by the base station and enter the training phase if the optimal phase is not brought to improve HSDPA performance.
- the algorithm parameters of the training phase can be as shown in Table 1.
- the number of large rotating phases When implemented, the actual rotational phase can be configured by parameters.
- the algorithm variables in the training phase can be as shown in Table 2.
- the training phase can include:
- Step 61 Adjust the phase.
- Step 62 Perform statistics on performance of different phases.
- the CQI may be a CQI reported by the UE according to the antenna output signal of the base station, that is, after receiving the signal sent by the base station, the UE may obtain the CQI based on the received signal.
- the specific performance statistics can be as follows:
- the flag When receiving the CQI reported by the UE, if the UE is in the data transmission state, the flag is set to count the CQI reported by the UE in the digital transmission state.
- the UE in the state of the number of packets can also report the CQI, and the CQI can be counted. Therefore, it can be identified which CQIs reported by the UE need to be counted. For example, if the CQI flag reported by the UE in the data transmission state is set to 1, the CQI flag reported by the UE in the non-number transmission state is set to 0, and when the CQI is counted, only the CQI with the flag 1 is counted, and the CQI is counted.
- the way can be as follows:
- Step 63 Filter performance of different phases.
- the current phase is ⁇ /3, then the CQI reported by the UE under ⁇ /3 in the first TrainPrd, the CQI reported by the UE under ⁇ /3 in the second TrainPrd, ..., in the current TrainPrd
- the CQI reported by the UE at ⁇ /3, and by dividing by the number of CQIs, the CQI average value of ⁇ /3 is obtained.
- Alpha filtering is performed on the CQI statistic values obtained for the lock decision corresponding to the same phase in different training cycles:
- StsCqiLock[PrdCnt] StsCqiLock[PrdCnt] x (1- alphalock) + CqiMean[i] ⁇ alphalock;
- CqiMean[i] is the average of CQI of ⁇ /3.
- the CQI statistic used for the lock decision at ⁇ /3 of the current TrainPrd is equal to the alpha filter value of the CQI statistic for locking the decision and the CQI average of ⁇ /3 at ⁇ /3 of the previous TrainPrd.
- StsCqiUnlock[PrdCnt] StsCqiUnlock[PrdCnt] *(1- alphaunlock) + CqiMean[i] x alphaunlock
- CqiMean[i] is the average of CQI of ⁇ /3.
- the CQI statistic for the non-locking decision under ⁇ /3 of the current TrainPrd is equal to the alpha filter value of the CQI statistic for the non-locked decision and the CQI average of ⁇ /3 for the previous TrainPrd.
- the CQI statistic value is filtered in the manner of the alpha filtering. It is to be understood that the filtering may be performed in other manners.
- Step 64 Determine whether all phases have been traversed
- judging whether all the phases are traversed can be realized by judging whether a training period is completed; if all the phases are traversed, step 65 is performed; otherwise, step 61 is performed, and the signals outputted by the next phase are continuously adjusted. The phase difference.
- Step 65 Find an optimal phase
- Step 66 Lock the phase decision.
- TempMeanl mean(StsCqiLock [0, ⁇ , TrainPrd -1]), ie the first average above;
- TempMean2 mean(StsCqiLock [x - TrainPrd /4, ... , ... , TrainPrd /4]) , ie the above second average value;
- CQI average for non-locking decisions at all phases: TempMean3 mean(StsCqiUnlock [0, ⁇ , TrainPrd -1]) , the third average above;
- Step 67 When the working phase is entered, the counter is started to count, and the physical antenna signal is continuously adjusted by the locked phase, that is, the phase rotation is performed;
- Step 68 Determine whether the current working period is by comparing the counting size of the counter with the value of the set working period. If yes, if the counting is less than the value of the working period, proceed to step 67; otherwise, end the working phase. Go to step 61 and enter the training phase.
- the CQI statistics are performed in the following ways:
- Performance filtering of different phases is performed for each UE in the following manner:
- loop processing i 0: TrainPrd -1 ;
- Optimal phase finding can be performed for each UE in the following ways: For each UE in the cell, the maximum value MaxCqi[m] can be found in StsCqi [m][0, ..., TrainPrd -1], and the index is x[m], and the phase corresponding to the maximum value is Optimal phase.
- the UE may be sorted according to the determined optimal phase of each UE, for example, according to the order of the optimal phase from small to large, and then, when the UE is scheduled, the UE may be scheduled according to the optimal phase from small to large.
- the optimal phase of the first UE is set by using the determined optimal phase of the first UE, for example, determining that the optimal phase of the A user is alpha, and the optimal phase of the B user Beta, then when scheduling to the A user, set the optimal phase of the A user to alpha.
- scheduling to the B user set the optimal phase of the B user to beta. It can be understood that the optimal phase can also be from large to small.
- the order is scheduled for the UE, so that scheduling all users in the order of the optimal phase size is equivalent to sweeping 2 ⁇ .
- the optimal phase can be set separately for each user, so that the optimal phase is more targeted, so that the performance of each user can be optimized, and the overall performance is also You can get optimization. Further, on the basis that the optimal phase already exists, when it is necessary to perform the phase sweep again, the phase traversal of the full range at [0, 2 ⁇ ] may not be performed, but the left and right ranges of the optimal phase may be scanned and Find the optimal phase. Yet another embodiment of the present invention also provides a process of scanning and finding an optimal phase in the left and right range of the optimal phase in the power balance method between antennas. As shown in FIG. 7, the process may include the following.
- Step 71 Based on the optimal phase determined in a previous work cycle, the phase is set about the optimal phase determined in the previous work cycle.
- the phase setting range can be [OptimiumPhase-d* Optim OptimiumPhase+d* ⁇ ! ] , where 2d+l is the number of phase updates during this phase sweep, ⁇ i is the amplitude of each phase adjustment, and the d and ⁇ values can be arbitrarily set.
- the phase can be adjusted once every time the left and right phase adjustment period ProPrd is passed.
- the period of the process of scanning and finding the optimal phase in the left and right range of the optimal phase is (2d+l)*ProPrd', and the period can be referred to as the left and right phase sweep period, and the left and right phase sweep period
- PrdCnt changes at the boundary of ProPrd, PrdCnt++, that is, the value of PrdCnt is increased by 1, that is, the value of PrdCnt is different, corresponding to different phases, where PrdCnt varies by [_d, d].
- £ sets the starting scan phase to be OptimiumPhase-d* ⁇ ! , then the next adjusted phase is OptimiumPhase+ ( -d+1 ) * ⁇ 1 ⁇
- the left and right sweep phase adjustment period ProPrd can be set according to actual needs.
- step 72 statistics are performed on the performance of different phases.
- step 71 there are 2d+1 phases in total, which can be under the 2d+l phase, according to
- the CQI reported by the UE performs performance statistics, and obtains the CQI accumulation sum in the same phase in different left and right phase sweep phases. For detailed statistics, refer to the related description in step 62.
- step 73 the performance of the different phases is filtered.
- CqiMean, [i] is the CQI mean value of the same phase counted in the phase setting mode of step 71
- CqiSum, [i] is the cumulative sum of CQI statistics at each phase, CqiCnt, [i] for each phase The number of CQI reports reported under the statistics.
- StsCqi' [PrdCnt] is the CQI statistic value in the left and right phase sweep period.
- Step 74 Determine whether all phases have been traversed
- determining whether to traverse all the phases can be realized by judging whether or not a left and right phase sweep period is completed; if all the phases are traversed, step 75 is performed; otherwise, step 71 is performed to continue to adjust the output signal with the next phase. The phase difference between them.
- Step 75 Find an optimal phase
- the phase corresponding to the maximum value can be taken as the optimal phase, and if the maximum value of StsCqi [-d,d] has two or more identical Value, then it can be considered that the optimal phase is not found, and the optimal phase in the previous duty cycle can be used as the optimal phase.
- step 76 can be performed to enter the working phase.
- Step 76 Enter the working phase, start the counter at the time of entering the working phase, and continue to adjust the physical antenna signal with the optimal phase determined in step 75.
- Step 77 Determine whether the current working period is by comparing the counting size of the counter with the value of the set working period. If yes, if the counting is less than the value of the working period, proceed to step 76; otherwise, end the working phase. , enter the left and right phase sweep phase, go to step 71.
- the optimum phase is determined by sweeping the left and right phases, and the new optimal phase can be tracked relatively quickly, which is less expensive.
- an Auto Phase Control (APC) duty cycle it is also possible to achieve entry by adding an Auto Phase Control (APC) duty cycle.
- APC Auto Phase Control
- the judgment of the training phase or the phase of the left and right phase sweeping that is to say, when it is judged that it is not in the working cycle, that is, when the working cycle is reached (the reaching of the working cycle means the end of one working cycle), it can be further judged whether the APC working cycle is reached, if If the APC work cycle is not reached (the APC work cycle means an APC work cycle is over), then the left and right phase sweep phase shown in Figure 7 is entered. If the APC work cycle is reached, the training phase shown in steps 61-66 is entered.
- determining whether the APC duty cycle is in progress can be implemented by a counter or a timer.
- FIG. 9 is a schematic structural diagram of an inter-antenna power balance device according to an embodiment of the present invention.
- the device includes: a matrix processing module 91, a phase rotation module 92, and an antenna 93.
- the matrix processing module 91 is configured to multiply the n virtual antenna signals by the orthogonal matrix to obtain n intermediate adjustment signals, where 1 is an integer >2; and the phase rotation module 92 is used to m of the n intermediate adjustment signals.
- the intermediate adjustment signal is phase rotated by a corresponding rotational phase, where m is an integer, and lmn, such that there is a phase difference between at least two of the n physical antenna signals output through the antenna; when 11 ⁇ 1 There is an intermediate adjustment signal without phase rotation in the physical antenna signal.
- the antenna 93 is for outputting n physical antenna signals.
- the phase rotation module 92 is specifically configured to multiply the m intermediate adjustment signals to achieve phase rotation, wherein ⁇ ⁇ is a rotation phase corresponding to the m intermediate adjustment signals, where p is 1 to m.
- the inter-antenna power balance device may further include: a phase update module 94, configured to update the value of ⁇ ⁇ in a 2 ⁇ cycle when the set period is reached or when the preset condition is met, where
- Phase update module 94 is further configured to update the number of times the value of ⁇ ⁇ in the cycle does not reach a 2 ⁇ PhaseNum continue to update the value of ⁇ ⁇ .
- the inter-antenna power balance device may further include: a first CQI statistic value obtaining module 95, a first maximum CQI statistic value obtaining module 96, and a first optimal phase determining module 97.
- the first CQI statistic value obtaining module 95 is configured to obtain a CQI statistic value for the lock decision corresponding to the user equipment in each rotation phase.
- the first maximum CQI statistic acquisition module 96 is operative to find the largest CQI statistic from the acquired CQI statistic for the lock decision.
- the first optimal phase decision module 97 is configured to determine whether to lock the phase corresponding to the maximum CQI statistic using the CQI statistic for the lock decision.
- the first CQI statistic value obtaining module 95 may include: a first CQI averaging submodule 951, and a first filtering submodule 952.
- the first CQI averaging sub-module 951 is configured to average the CQIs reported in the same rotational phase in at least one 2 ⁇ cycle to obtain a CQI average value in the same rotational phase; the first filtering sub-module 952 is configured to use the same rotational phase The lower CQI average is filtered to obtain CQI statistics for the lock decision at the respective rotational phases.
- the first optimal phase determination module 97 includes: an optimal phase acquisition sub-module 971, a first average value acquisition sub-module 972, a second average value acquisition sub-module 973, a third average value acquisition sub-module 974, and a fourth average acquisition. Sub-module 975, phase lock determination sub-module 976.
- the optimal phase acquisition sub-module 971 is configured to find an optimal phase according to the maximum CQI statistic value, where the optimal phase is a phase corresponding to the maximum CQI statistic value;
- the CQI statistic values for the lock decision at the respective rotation phases of the current 2 ⁇ period are averaged to obtain a first average value;
- the second average value acquisition sub-module 973 is used for
- the index value is [the index of the optimal phase minus the number of times the value of ⁇ ⁇ is updated within a 2 ⁇ period /4, and the index of the optimal phase plus the number of times the value of ⁇ ⁇ is updated within a 2 ⁇ period
- the CQI statistic value for the lock decision under the phase within /4] is averaged to obtain a second average value;
- the third average value acquisition sub-module 974 is used to obtain the phase for all phase rotations
- the CQI statistic values for the non-locking decision are averaged to obtain a third average value;
- the fourth average value obtaining sub-module 975
- the phase lock determination sub-module 976 may be specifically configured to: when the difference between the fourth average value and the third average value is greater than the non-lock state determination threshold value, the difference between the second average value and the first average value is greater than The locked state decision threshold value, and in the case where the difference between the fourth average value and the third average value is greater than the lock state decision threshold value, the optimal phase is locked.
- the phase rotation module 92 can be specifically configured to phase rotate the m intermediate adjustment signals with the locked optimal phase when the optimal phase is locked.
- the inter-antenna power balancing device may further include: an operating state setting module 98, configured to set a value of the working state locking flag according to the case of locking the optimal phase. If the optimal phase is not locked, the working state setting module 98 sets the value of the working state lock flag for indicating the locked optimal phase to 0; in the case of locking the optimal phase, the working state setting module 98 sets the value of the work status lock flag to 1.
- an operating state setting module 98 configured to set a value of the working state locking flag according to the case of locking the optimal phase. If the optimal phase is not locked, the working state setting module 98 sets the value of the working state lock flag for indicating the locked optimal phase to 0; in the case of locking the optimal phase, the working state setting module 98 sets the value of the work status lock flag to 1.
- the setting of the value of the working state lock flag is described in the above method embodiment.
- the inter-antenna power balancing device may further include: a lock continuation determining module 99, configured to determine whether to continue phase rotation of the m intermediate adjustment signals with an optimal phase according to the set working period, and the specific determining method is detailed. See the description in the above method embodiment.
- the inter-antenna power balancing device may further include: a first scheduling module, It is used to schedule users by using a proportional fair scheduling algorithm, so that the user's diversity gain can be utilized, and the throughput rate of the cell can be improved. Further, the HSDPA performance can be improved by the corresponding scheduling algorithm.
- the power balance device between the antennas performs phase rotation on the signal obtained by multiplying the virtual antenna signal and the VAM matrix, so that the signals output by the antenna generate different phases.
- the different phases of the output signals can make the HSDPA Performance fluctuations can improve HSDPA performance while maintaining power balance between the antennas.
- an inter-antenna power balancing device which may include:
- the matrix processing module is configured to multiply the n virtual antenna signals by the orthogonal matrix to obtain n intermediate adjustment signals, where 1 is an integer > 2; and the phase rotation module is used to m intermediate n of the n intermediate adjustment signals
- the adjustment signal uses a corresponding rotation phase for phase rotation, where m is an integer, and lmn, such that there is a phase difference between at least two of the n physical antenna signals output through the antenna; when m ⁇ n, physical There is an intermediate adjustment signal in the antenna signal that is not phase rotated.
- the antenna is used to output n physical antenna signals.
- the phase rotation module is specifically configured to multiply the m intermediate adjustment signals to achieve phase rotation, wherein ⁇ ⁇ is a corresponding rotation phase of the m intermediate adjustment signals, which is l ⁇ m.
- the intermediate adjustment signal performs phase rotation.
- the apparatus may further include: a second CQI statistic value acquisition module, a second maximum CQI statistic value acquisition module, and a second optimal phase determination module.
- the second CQI statistic value obtaining module is configured to obtain CQI statistic values corresponding to each UE in each rotation phase.
- the second largest CQI statistic value obtaining module is configured to find a maximum CQI statistic value corresponding to each UE from the acquired CQI statistic values corresponding to the UEs.
- the second optimal phase decision module is configured to use a phase corresponding to a maximum CQI statistic corresponding to each of the UEs as an optimal phase of the respective UEs.
- the second CQI statistic value obtaining module may include: a second CQI averaging submodule and a second filtering submodule.
- the second CQI averaging sub-module is configured to average CQIs reported in the same rotation phase in at least one 2 ⁇ period of each UE to obtain CQI average values of the UEs in the same rotation phase;
- the CQI average values of the UEs in the same rotation phase are filtered to obtain CQI statistics values of the UEs in the respective rotation phases.
- the apparatus in this embodiment may further include a second scheduling module.
- the second scheduling module is configured to schedule the UE according to the current scheduling algorithm, and when scheduling to the first UE, set the first UE according to the optimal phase of the first UE that is searched by the second optimal phase determining module.
- Optimal phase; or, the second scheduling module is configured to sort according to the size of the optimal phase of each UE determined by the second optimal phase determination module, for example, sorting according to the optimal phase from small to large, and then scheduling the UE The UE may be scheduled according to the optimal phase from small to large.
- the optimal phase of the first UE is set by using the determined optimal phase of the first UE, for example, determining ⁇
- the optimal phase of the user is alpha, the beta of the optimal phase of the B user.
- the optimal phase of the A user is alpha.
- the optimal phase of the B user is set the optimal phase of the B user to be beta. It can be understood that the UE can also be scheduled in descending order of the optimal phase, so that scheduling all users in the order of the optimal phase is equivalent to sweeping the phase 2 ⁇ .
- the optimal phase can be set separately for each user, so that the optimal phase is more targeted, so that the performance of each user can be optimized, and the overall performance is also You can get optimization. Further, on the basis that the optimal phase already exists, when it is necessary to sweep the phase again, only the left and right scanning phases can be performed.
- the inter-antenna power balancing device according to still another embodiment of the present invention It can also include:
- a second phase update module configured to center on an optimal phase determined in a previous work cycle, and perform phase setting on an optimal phase determined in the previous work cycle, where the phase setting includes: A left and right sweep phase adjustment cycle, in [OptimiumPhase-d* ⁇ ! , OptimiumPhase+d* ⁇ ! The value of the phase is updated sequentially in the range, where OptimiumPhase is the optimal phase determined in the previous working cycle, 2d+l is the number of phase updates during the phase scan, and ⁇ i is the phase update every time. Amplitude.
- d and ⁇ can be set arbitrarily. For example, if the starting scanning phase is OptimiumPhase-d* ⁇ , then the next adjusted phase is OptimiumPhase+ ( -d+1 ) * ⁇
- the phase rotation module can be further used for phase rotation according to the phase set by the second phase update module.
- the device may further comprise a summation module for performing statistics on the CQIs of the same phase in different left and right phase sweep phases according to the CQI reported by the UE in the 2d+1 phases of the left and right phase sweep phases.
- CqiSum[PrdCnt,] + Report CQI; CqiCnt[PrdCnt'] ++ .
- the device may further include a filtering module, configured to accumulate and acquire CQI average values in the same phase according to CQIs acquired in the same phase obtained by the summing module, and obtain filtered CQI statistical values according to the average value, where the filtered CQI statistics are obtained.
- the device may further include a traversal determination module, configured to determine whether all phases are traversed, that is, whether the number of phase updates reaches 2d+l, and the second phase update module continues to perform phase when the number of phase updates has not reached 2d+l Settings.
- the phase rotation module continues to adjust the phase difference between the output signals with the next phase.
- the apparatus can also include an optimal phase finding module for determining a maximum value in the filtered CQI statistic for each phase and determining a phase corresponding to the maximum value as the optimal phase.
- the optimal phase finding module can take the phase corresponding to the maximum value as the optimal phase, and if the maximum value of StsCqi [-d,d] has two or If two or more identical values are used, it can be considered that the optimal phase is not found, and the optimal phase finding module can use the optimal phase in the previous duty cycle as the optimal phase.
- the lock continuation determination module of the device in this embodiment may be further configured to start the counter counting after the optimal phase finding module determines the optimal phase, and continue to determine the most optimal phase finding module when the duty cycle is not reached.
- the phase adjustment physical antenna signal when the duty cycle is reached, starts the second phase update module, and then enters the left and right phase sweep phase again.
- the device in this embodiment determines the optimal phase by sweeping the left and right phases, and can track the new optimal phase relatively quickly, at a low cost.
- the device may further include an APC work cycle judging module, configured to determine whether the APC work cycle is reached when the work cycle judging module judges that the work cycle is reached, and if the APC work cycle is not reached, start the second phase update module, thereby Entering the left and right phase sweep phase, if the APC work cycle is reached, the phase update module 94 is activated to enter the training phase.
- determining whether the APC duty cycle is in progress can be implemented by a counter or a timer. It should be noted that the implementation or interaction process of the modules or sub-modules in the foregoing embodiments of the power balancing device may be referred to the related description of the method embodiments.
- FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention.
- the base station includes means 101 for improving the performance of the HSDPA while maintaining power balance between the antennas.
- the device 101 can be any of the inter-antenna power balancing devices provided by the above device embodiments.
- the base station performs phase rotation on the signal obtained by multiplying the virtual antenna signal and the VAM matrix by the power balance device between the antennas, so that the signals output by the antenna generate different phases.
- different phases of the output signals can be made.
- the HSDPA performance fluctuates, thereby improving HSDPA performance while maintaining power balance between the antennas.
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EP11795195.4A EP2568621A4 (en) | 2010-06-18 | 2011-06-20 | METHOD AND DEVICE FOR CURRENT COMPENSATION BETWEEN ANTENNAS AND BASE STATION THEREWITH |
JP2013514542A JP2013535138A (ja) | 2010-06-18 | 2011-06-20 | アンテナ間の電力の平衡を保つための方法及び装置、そして基地局 |
BR112012032268A BR112012032268A2 (pt) | 2010-06-18 | 2011-06-20 | método e aparelho para equilibrar a capacidade entre antenas e a estação base |
US13/709,860 US8705594B2 (en) | 2010-06-18 | 2012-12-10 | Method and apparatus for balancing power between antennas, and base station |
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CN201010207844.5 | 2010-06-18 | ||
CN201110161960.2A CN102223701B (zh) | 2010-06-18 | 2011-06-16 | 天线间功率平衡方法及装置、基站 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2424066R1 (es) * | 2012-03-26 | 2013-10-30 | Vodafone Espana Sau | Procedimiento y sistema para transmision mejorada en redes de comunicacion moviles |
EP2611045A3 (en) * | 2012-01-02 | 2017-05-17 | Vodafone Group plc | System and method for enhanced transmission in mobile communication networks using an active antenna arrangement |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101854712A (zh) | 2010-06-18 | 2010-10-06 | 华为技术有限公司 | 天线间功率平衡方法及装置、基站 |
CN102006109B (zh) * | 2010-11-11 | 2014-04-30 | 中兴通讯股份有限公司 | 采用虚拟天线映射方式进行发射的方法及系统 |
CN101984707B (zh) * | 2010-11-12 | 2014-08-13 | 中兴通讯股份有限公司 | Hsdpa终端吞吐率调整方法和装置 |
CN104170478A (zh) * | 2013-03-20 | 2014-11-26 | 华为技术有限公司 | 混合组网中数据的发送方法、装置和系统 |
CN103718475B (zh) * | 2013-09-18 | 2017-04-26 | 华为技术有限公司 | 多入多出信号处理方法、装置和基站 |
WO2015062012A1 (zh) * | 2013-10-31 | 2015-05-07 | 华为技术有限公司 | 一种相位测量方法、装置和系统 |
US9608707B2 (en) * | 2014-05-07 | 2017-03-28 | Qualcomm Incorporated | Hybrid virtual antenna mapping for multiple-input multiple-output system |
KR102429734B1 (ko) | 2016-08-18 | 2022-08-05 | 삼성전자 주식회사 | 이동 통신 시스템에서 위상을 스위칭해 신호를 전송하는 방법 및 장치 |
EP3506523A4 (en) | 2016-09-19 | 2019-08-07 | Huawei Technologies Co., Ltd. | SIGNAL TRANSMISSION METHOD, AND BASE STATION |
WO2018090262A1 (zh) * | 2016-11-16 | 2018-05-24 | 华为技术有限公司 | 一种小区相位的控制方法及装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101174867A (zh) * | 2007-08-10 | 2008-05-07 | 北京邮电大学 | 一种降低多载波系统中高峰均功率比的方法 |
CN101288245A (zh) * | 2005-08-22 | 2008-10-15 | 高通股份有限公司 | 用于多输入多输出系统中的天线选择的方法和设备 |
CN101292442A (zh) * | 2005-08-22 | 2008-10-22 | 高通股份有限公司 | 虚拟天线选择方法和装置 |
CN101297512A (zh) * | 2005-10-28 | 2008-10-29 | 松下电器产业株式会社 | 发送装置、接收装置、发送方法、接收方法以及无线通信系统 |
CN101854712A (zh) * | 2010-06-18 | 2010-10-06 | 华为技术有限公司 | 天线间功率平衡方法及装置、基站 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7586886B2 (en) | 2004-10-06 | 2009-09-08 | Broadcom Corporation | Method and system for single weight antenna system for HSDPA |
US9408220B2 (en) * | 2005-04-19 | 2016-08-02 | Qualcomm Incorporated | Channel quality reporting for adaptive sectorization |
US7558330B2 (en) * | 2005-12-07 | 2009-07-07 | Telefonaktiebolaget L M Ericsson (Publ) | Multiple stream co-phasing for multiple-input-multiple-output (MIMO) systems |
KR20070113967A (ko) * | 2006-05-26 | 2007-11-29 | 엘지전자 주식회사 | 위상천이 기반의 프리코딩 방법 및 이를 지원하는 송수신기 |
TWI343200B (en) * | 2006-05-26 | 2011-06-01 | Lg Electronics Inc | Method and apparatus for signal generation using phase-shift based pre-coding |
KR20080026019A (ko) * | 2006-09-19 | 2008-03-24 | 엘지전자 주식회사 | 위상천이 기반의 프리코딩 방법 및 이를 지원하는 송수신기 |
WO2008050745A1 (fr) * | 2006-10-24 | 2008-05-02 | Panasonic Corporation | Dispositif de communication radio et procédé de communication radio |
US8780771B2 (en) * | 2007-02-06 | 2014-07-15 | Qualcomm Incorporated | Cyclic delay diversity and precoding for wireless communication |
WO2008098093A2 (en) * | 2007-02-06 | 2008-08-14 | Qualcomm Incorporated | Apparatus and method for mimo transmission with explicit and implicit cyclic delays |
US8014734B2 (en) * | 2007-03-15 | 2011-09-06 | Magnolia Broadband Inc. | Method, apparatus and system for controlling a transmit diversity device |
KR20100019948A (ko) * | 2008-08-11 | 2010-02-19 | 엘지전자 주식회사 | 공간 다중화 기법을 이용한 데이터 전송방법 |
US9077414B2 (en) * | 2008-11-03 | 2015-07-07 | Nokia Technologies Oy | Method, apparatuses and computer program products for transmission diversity |
WO2010148550A1 (en) * | 2009-06-22 | 2010-12-29 | Huawei Technologies Co., Ltd. | A method and system for assigning reference signals in multi antenna context |
-
2010
- 2010-06-18 CN CN201010207844A patent/CN101854712A/zh active Pending
-
2011
- 2011-06-16 CN CN201110161960.2A patent/CN102223701B/zh active Active
- 2011-06-20 EP EP11795195.4A patent/EP2568621A4/en not_active Withdrawn
- 2011-06-20 WO PCT/CN2011/075911 patent/WO2011157229A1/zh active Application Filing
- 2011-06-20 BR BR112012032268A patent/BR112012032268A2/pt not_active Application Discontinuation
- 2011-06-20 JP JP2013514542A patent/JP2013535138A/ja active Pending
-
2012
- 2012-12-10 US US13/709,860 patent/US8705594B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101288245A (zh) * | 2005-08-22 | 2008-10-15 | 高通股份有限公司 | 用于多输入多输出系统中的天线选择的方法和设备 |
CN101292442A (zh) * | 2005-08-22 | 2008-10-22 | 高通股份有限公司 | 虚拟天线选择方法和装置 |
CN101297512A (zh) * | 2005-10-28 | 2008-10-29 | 松下电器产业株式会社 | 发送装置、接收装置、发送方法、接收方法以及无线通信系统 |
CN101174867A (zh) * | 2007-08-10 | 2008-05-07 | 北京邮电大学 | 一种降低多载波系统中高峰均功率比的方法 |
CN101854712A (zh) * | 2010-06-18 | 2010-10-06 | 华为技术有限公司 | 天线间功率平衡方法及装置、基站 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2568621A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2611045A3 (en) * | 2012-01-02 | 2017-05-17 | Vodafone Group plc | System and method for enhanced transmission in mobile communication networks using an active antenna arrangement |
ES2424066R1 (es) * | 2012-03-26 | 2013-10-30 | Vodafone Espana Sau | Procedimiento y sistema para transmision mejorada en redes de comunicacion moviles |
EP2645593A3 (en) * | 2012-03-26 | 2015-12-02 | Vodafone IP Licensing Limited | Method and System for Enhanced Transmission in Mobile Communication Networks |
US9225403B2 (en) | 2012-03-26 | 2015-12-29 | Vodafone Ip Licensing Limited | Method and system for enhanced transmission in mobile communication networks |
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JP2013535138A (ja) | 2013-09-09 |
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US8705594B2 (en) | 2014-04-22 |
CN101854712A (zh) | 2010-10-06 |
CN102223701A (zh) | 2011-10-19 |
CN102223701B (zh) | 2014-12-31 |
BR112012032268A2 (pt) | 2016-11-29 |
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