WO2010127518A1 - 基于频分双工系统的多用户波束赋形方法与装置 - Google Patents

基于频分双工系统的多用户波束赋形方法与装置 Download PDF

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Publication number
WO2010127518A1
WO2010127518A1 PCT/CN2009/072796 CN2009072796W WO2010127518A1 WO 2010127518 A1 WO2010127518 A1 WO 2010127518A1 CN 2009072796 W CN2009072796 W CN 2009072796W WO 2010127518 A1 WO2010127518 A1 WO 2010127518A1
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Prior art keywords
user terminal
arrival
angle
group
user
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PCT/CN2009/072796
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English (en)
French (fr)
Inventor
郭阳
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP09844270.0A priority Critical patent/EP2271009B1/en
Priority to US12/993,117 priority patent/US8189498B2/en
Publication of WO2010127518A1 publication Critical patent/WO2010127518A1/zh
Priority to US13/443,893 priority patent/US8837407B2/en

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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
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • 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
    • H04B7/0452—Multi-user MIMO systems
    • 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
    • H04B7/0617—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 for beam forming
    • 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
    • H04B7/0665—Feed forward of transmit weights to the receiver
    • 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
    • H04B7/0697—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 spatial multiplexing
    • 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
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming

Definitions

  • the present invention relates to communication or, in particular, to a frequency division duplex (FCD) system based on frequency division duplex (Frequency Division Duplex) User beam I beamforming method and apparatus.
  • FCD frequency division duplex
  • Frequency Division Duplex Frequency Division Duplex
  • BACKGROUND OF THE INVENTION A multiple input and multiple output (MIMO) system has become a technology of great interest in the Long Term Evolution (LTE) system due to increased channel capacity.
  • LTE Long Term Evolution
  • the direction of the I-shaped beam is designed by designing the weight vectors of the appropriate transmitting and receiving antennas, thereby distinguishing the signals of the multi-users and removing the inter-users.
  • the beam I method can distinguish users by the orientation of the user, so that multiple users can reuse the same time and frequency resources.
  • the beam I form technology mainly works by controlling the beam direction, and is more suitable for use in an open suburban scene.
  • the beam I can obtain a significant beam energy gain, which can expand the coverage of the cell.
  • the direction of the shaped beam is designed by designing the weight vectors of the appropriate transmit and receive antennas, the specific shape of the beam is controlled, the main lobe can be formed in the desired direction, and the zero is formed in the direction of the dry 4 Trap, thus removing the dry 4 between users.
  • how to deal with the beamforming problem among multiple users is still under study.
  • the main object of the present invention is to provide a multi-user beam I method and apparatus based on a frequency division duplex system, It realizes beamforming of downlink signals to multiple users quickly in the FDD system.
  • a multi-user beam I method based on a frequency division duplex system is provided.
  • the multi-user beamforming method based on frequency division duplex system includes: utilizing zero trap
  • the spreading algorithm determines the transmission weights of the downlink signals of the user terminals when the two or more user terminals are at the respective angles of arrival, and stores them on the network side; and the network side groups the user terminals according to the angle of arrival information reported by the user terminal, and then Selecting a corresponding transmission weight for each downlink signal of each user terminal in the group according to the direction of arrival information of each user terminal in the group, and multiplying the selected transmission weight by the downlink data stream of the corresponding user terminal, and then passing Antenna launch.
  • the method further includes: after grouping the user terminals by the network side, notifying each user terminal in the group of the reach angle information of all user terminals in each group.
  • the above angle of arrival is a quantized value.
  • the quantized value of the angle of arrival is assigned an identified binary number, and the quantized value of each of the angle of arrival corresponds to an identifier consisting of the identified binary number.
  • the user terminal after measuring the angle of arrival angle value, the user terminal selects the closest value of the angle of arrival angle as the measured value, and extracts an identifier corresponding to the measured value; the network side feeds back all users in each group to the user terminal. The identifier corresponding to the terminal's angle of arrival.
  • the network side groups the user terminals according to the angle of arrival information reported by the user terminal, specifically:
  • the difference between the angles of arrival of the user terminals is greater than or equal to two. When it is ten degrees, it is divided into one group.
  • the difference between the angles of arrival of the four turns on the user terminal is greater than or equal to ten degrees, it is divided into one group.
  • a multi-user beam I method based on a frequency division duplex system is provided.
  • the multi-user beamforming method based on the frequency division duplex system includes: determining a transmission weight of each downlink signal of each user terminal when two or more user terminals are at respective angles of arrival by using a null trap width algorithm, and storing the weights of each downlink signal of each user terminal And the user terminal receives the arrival angle information and the downlink signal of each user terminal in the user terminal group of the network side, and determines the downlink signal according to the arrival angle information of each user terminal in the group where the user terminal is located.
  • the transmission weight is used to demodulate the downlink signal using the transmission weight.
  • the determining manner of the group in which the user terminal is located is: For a four-antenna frequency division duplex system, when the difference between the angles of arrival of the user terminal is greater than or equal to twenty degrees, it is a group; In the system, when the difference between the angles of arrival of the user terminals is greater than or equal to ten degrees, it is a group.
  • the above angle of arrival is a quantized value.
  • the quantized value of the angle of arrival is assigned an identified binary number, and the quantized value of each of the angle of arrival corresponds to an identifier consisting of the identified binary number.
  • the user terminal After measuring the angle of arrival angle value, the user terminal selects the closest value of the angle of arrival as the measured value, and reports the identifier corresponding to the measured value to the network side; the network side sends each user terminal in the user terminal group An identifier corresponding to the angle of arrival of all user terminals in the group.
  • a multi-user beam I weapon device based on a frequency division duplex system is provided.
  • the multi-user beam I-shaped device based on the frequency division duplex system includes: a determining unit, configured to determine, by using a null trapping width algorithm, downlink signals of each user terminal when two or more user terminals are at respective angles of arrival a transmission weight, a storage unit, configured to store a transmission weight corresponding to a downlink signal of each user terminal when two or more user terminals are at respective angles of arrival; a receiving unit, configured to receive an angle of arrival information reported by the user terminal; And the grouping unit is configured to group the user terminals according to the arrival angle information received by the receiving unit, and the selecting unit is configured to select, according to the angle of arrival information of each user terminal in each group, a downlink signal corresponding to each user terminal in the group.
  • the foregoing apparatus further includes: a notification unit, configured to notify, to each user terminal in the group, the angle of arrival information of all user terminals in the group of user terminals divided by the grouping unit.
  • the grouping unit groups the downlink signals of the user terminal according to the arrival angle information received by the receiving unit, specifically: for a four-antenna frequency division duplex system, a difference between the arrival angles of the user terminals When the value is greater than or equal to twenty degrees, the downlink signals of the user terminal are grouped into one group; for the eight-antenna frequency division duplex system, when the difference between the angles of arrival of the four terminals on the user terminal is greater than or equal to ten degrees, the user The downlink signals of the terminal are grouped into one group.
  • a multi-user beam I-shaped device based on a frequency division duplex system is provided.
  • the multi-user beamforming device based on the frequency division duplex system includes: a first determining unit, configured to determine, by using a null trapping width algorithm, downlink signals of each user terminal when two or more user terminals are at respective angles of arrival a transmission weight, a storage unit, configured to store a transmission weight corresponding to a downlink signal of each user terminal when two or more user terminals are at respective angles of arrival; a receiving unit, configured to receive a downlink signal sent by the network side, and a network side Point-of-arrival information of each user terminal in the user terminal group; a determining unit, configured to determine, according to the angle of arrival information of each user terminal in the group in which the user terminal is located, a transmission weight used by the downlink signal received by the receiving unit; and a demodulation unit configured to determine by using the second determining unit The transmission weight demodulates the downlink signal.
  • the device further includes: a measuring unit, configured to measure an angle of arrival of the user terminal according to the downlink signal received by the receiving unit; and an upper unit for reporting the angle of arrival information measured by the measuring unit to the network side.
  • the above angle of arrival is a quantized value.
  • the apparatus further includes: an identifying unit, configured to allocate an identified binary number to the quantized value of the angle of arrival, the quantized value of each of the angle of arrival corresponds to an identifier consisting of the identified binary number; After the angle of the angle of the user terminal is obtained, the nearest value of the angle of arrival is selected as the measured value, and the identifier corresponding to the measured value of the upper 4 ⁇ unit to the network side.
  • the invention first quantizes the angle of arrival of the user terminal, and then uses the null trap width algorithm to calculate the transmission weights of the downlink signals of the user terminals in the user terminal group at different angles of arrival, and stores them in the network after the calculation is completed.
  • the side and each user terminal in the case of beamforming the multi-user terminal, according to the angle of arrival information reported by each user terminal and the number of user terminals, according to the stored angle of the user terminal in the stored user terminal group
  • the corresponding relationship between the downlink signal transmission weights of the user equipment and the transmission weight of the downlink signal of the user terminal is directly determined, so that it is not necessary to determine the transmission weight of the downlink signal beamforming of each user terminal in the user terminal group in real time, and therefore, the transmission weight can be reduced.
  • FIG. 1 The computational burden on the network side improves the efficiency of beamforming, thereby improving the capacity of the FDD system while ensuring communication quality.
  • FIG. 1 The computational burden on the network side improves the efficiency of beamforming, thereby improving the capacity of the FDD system while ensuring communication quality.
  • FIG. 1 is a multi-user beam assignment based on a frequency division duplex system according to a first embodiment of the method of the present invention.
  • FIG. 2 is a flowchart of a multi-user beamforming method based on a frequency division duplex system according to Embodiment 2 of the method of the present invention;
  • FIG. 3 is a frequency division based on Embodiment 1 of the apparatus according to the present invention;
  • FIG. 4 is a schematic structural diagram of a multi-user beamforming device based on a frequency division duplex system according to Embodiment 2 of the present invention.
  • FIG. 2 is a flowchart of a multi-user beamforming method based on a frequency division duplex system according to Embodiment 2 of the method of the present invention.
  • FIG. 3 is a frequency division based on Embodiment 1 of the apparatus according to the present invention;
  • FIG. 4 is a schematic structural diagram of a multi-user beamforming device based on a frequency division duplex system according to Em
  • the angle of arrival of the user terminal is quantized, and then the zero-sag extension algorithm is used to calculate the user terminals of the user terminal group at different angles of arrival.
  • the transmission weights of the downlink signals are stored in the network side and each user terminal after the calculation is completed.
  • the transmission weight of the terminal downlink signal beam I is shaped, so that the computational burden on the network side can be alleviated, and the efficiency of beamforming can be improved, thereby improving the capacity of the FDD system while ensuring communication quality.
  • Method Embodiment 1 According to an embodiment of the present invention, a multi-user beamforming method based on a frequency division duplex system is provided. 1 is a flow chart of multi-user beamforming based on a frequency division duplex system according to a first embodiment of the method of the present invention. As shown in FIG. 1, this embodiment is based on a multi-user beamforming of a frequency division duplex system.
  • the method includes the following steps 101 to 103: Step 101: Using a null trap width algorithm to determine that two or more user terminals are at respective angles of arrival The transmission weight of the downlink signal of the user terminal is stored on the network side.
  • the angle of arrival of the user terminal and the network side (base station) is identified using a quantized manner.
  • the range covered by the sector is from -60° to 60°
  • the range of the angle of arrival of the user terminal is 120°, which can quantize the angle of arrival of the user terminal to 10 angles.
  • Values are -55°, -45°, -35°, -25°, -15°, -5°, 5°, 15°, 25°, 35°, 45°, 55°.
  • the foregoing quantization angle is preferably an angle that divides the entire sector, so that after the user terminal measures the actual angle of arrival, the closest angle to the quantized value is selected as the angle of arrival, and is reported to the network side. .
  • the angle of arrival can be quantized into 16 angles, and the angle values of the angles of arrival are respectively:
  • the POD angle of each user terminal can be identified by a 4-bit binary symbol. According to the quantized value of the angle of arrival, the transmission weight of the downlink signal of the user terminal when the multi-user terminal performs the beam I-form in the case of various angles of arrival is determined.
  • the null-out width-of-width algorithm is used to calculate the transmission weights of the downlink signals of the user terminals when the two user terminals are respectively at the aforementioned 16 angles of arrival.
  • the null trap width algorithm is a mature beam I algorithm, which can perform beamforming processing on downlink signals of more than two user terminals, so that after beamforming, the main signal of the downlink signal The direction of the lobes is located in the direction of the arrival angle of the user terminal of the downlink signal, and the direction of the sag of the downlink signal is located in the direction of the main lobe of the downlink signals of the remaining user terminals.
  • Step 102 The network side groups the user terminals according to the angle of arrival information reported by the user terminal, and notifies each user terminal in the group of the angle of arrival information of all the user terminals in each group.
  • the network side cannot directly obtain the downlink channel information through the uplink channel information. Therefore, the network side cannot use the downlink channel matrix information to acquire the angle of arrival of the user terminal.
  • the user terminal can be utilized. The measurement of the angle of arrival between the user terminal and the base station is completed, and the user terminal completes the channel estimation of the downlink signal according to the common pilot, thereby acquiring the downlink channel matrix information, and calculating the user terminal according to the downlink channel matrix information and transmitting the The angle of arrival between base stations of the downlink signal.
  • the present invention adopts the aforementioned quantized wave angle method to report the measured angle of arrival by reporting an identifier corresponding to the quantized angle of arrival.
  • a binary number is used to identify; still in the range between -60 degrees and 60 degrees of the angle of arrival, quantized into the aforementioned 16 values, then 4 bits are used.
  • the binary characters can identify the above 16 types of angle of arrival angle values, which correspond to binary numbers of "0000” to "1111", respectively. For example, if the user terminal measures the actual angle of arrival angle value as 10 degrees, the quantization angle of 11.25 degrees closest to 10 degrees is selected as the measured value, and is reported to the network side. At this time, the binary number of "0110" is selected. To the network side (base station). Since the correspondence between the reported binary number and the angle of arrival angle measured by the user terminal is agreed in the system, after receiving the value of "0110", the base station side can determine that the user terminal's angle of arrival is 11.25 degrees. Resources that originally carry a Precoding Matrix Indication (PMI) information can be used to carry the angle of arrival information.
  • PMI Precoding Matrix Indication
  • the network side groups the downlink signals to be transmitted according to the angle of arrival of each user terminal.
  • the principle of grouping mainly considers that the downlink signals in the group do not cause interference, at least, in beamforming.
  • On the main lobe of the downlink signal there can be no interference from other downstream signal side lobes.
  • the invention can ensure that the downlink signal of each user terminal in the user terminal group is located in the downlink of other user terminals through the null trapping algorithm.
  • the main lobe of the signal is such that interference between the downstream signals within the user terminal group is minimized.
  • the present invention Considering the requirements of the beamforming of the present invention, if the angular difference of the main lobe direction between the downlink signals is small, the requirement that the nulls of other downlink signals are located on the main lobe of a downlink signal cannot be realized, and therefore, the present invention
  • the principle of grouping the downlink signals is: For a 4-antenna FDD system, when the difference between the angles of arrival of the user terminals is greater than or equal to 20 degrees, it is divided into one group, preferably, for a 4-antenna FDD system.
  • the difference between the angles of arrival of the user terminals is greater than 40 degrees, it is divided into one group; for the 8-antenna FDD system, when the difference between the angles of arrival of the user terminals is greater than or equal to 10 degrees, One group, preferably, for 8 antennas of FDD In the system, the difference between the angles of arrival of the user terminals is greater than 20 degrees and is grouped into one group. After the user terminal group is determined, the angle of arrival information of all the user terminals in the user terminal group is respectively notified to each user terminal in the user terminal group.
  • Step 103 The network side selects, according to the angle of arrival information of each user terminal in each group, a corresponding transmission weight for the downlink signal of each user terminal in the group, and selects the selected transmission weight and the downlink data stream of the corresponding user terminal. After multiplication, it is transmitted through the antenna.
  • the network side utilizes the correspondence angle information of each user terminal in the user terminal group that is divided, according to the correspondence between the angle of arrival of each user terminal and the downlink signal transmission weight of the user terminal group stored in the network side.
  • the transmission weight for each downlink signal of each user terminal in the user terminal group Determining the transmission weight for each downlink signal of each user terminal in the user terminal group, before transmitting the downlink data signal to the user terminal, multiplying the selected transmission weight by the downlink data signal to be transmitted, and then loading the common pilot (Common Reference Signal)
  • the cylinder is called CRS), and is transmitted through the transmitting antenna on the network side, that is, the downlink beamforming of the user terminal group is completed.
  • the transmission weight selected by the network side has been calculated by the null trapping algorithm. Therefore, after multiplying the downlink data signal in the user terminal group, the downlink beam I is formed.
  • Method Embodiment 2 According to an embodiment of the present invention, a multi-user beamforming method based on a frequency division duplex system is provided. 2 is a flowchart of a multi-user beamforming method based on a frequency division duplex system according to Embodiment 2 of the method of the present invention. As shown in FIG.
  • Step 201 Determine a transmission weight of each downlink signal of each user terminal when two or more user terminals are at respective angles of arrival, and store them in each user terminal.
  • the angle of arrival of the user terminal and the network side (base station) is identified by using a quantized manner.
  • the method determines the angle of arrival of each user terminal in the user terminal group and the transmission weight of the downlink signal of each user terminal. The corresponding information is stored in all user terminals in the FDD system.
  • the correspondence information between the angle of arrival of each user terminal in the user terminal group and the transmission weight of the downlink signal of each user terminal is configured as configuration information in the user terminal, that is, before the user terminal leaves the factory. , or configure when the user terminal accesses the network.
  • the user terminal After receiving the reach angle information of each user terminal in the user terminal group on the network side, the user terminal determines that the downlink signal sent by the network side uses beamforming processing, and at this time, according to the user terminal group divided by the network side The angle of arrival information of each user terminal determines the transmission weight used by the network side for the current downlink signal, and demodulates the received downlink signal.
  • the multi-user beamforming method based on the frequency division duplex system further includes the following steps: after the user terminal measures the angle of arrival angle value, the closest value of the angle of arrival angle is selected as the measured value, and the network side reports and measures.
  • An identifier consisting of a binary number corresponding to the value; the network side transmits an identifier corresponding to the reach angle of all user terminals in each group to each user terminal in the user terminal group.
  • the binary identifier described in step 102 is also used.
  • the user terminal can determine the angle of arrival angle value notified by the network side according to the correspondence between the identifier and the angle of arrival angle value.
  • a multi-user beamforming apparatus based on a frequency division duplex system is provided.
  • 3 is a schematic structural diagram of a multi-user beamforming device based on a frequency division duplex system according to an embodiment of the present invention. As shown in FIG. 3, the multi-user beam assignment based on the frequency division duplex system in this embodiment is shown in FIG.
  • the shaped device includes: a determining unit 30, a storage unit 31, a receiving unit 32, a grouping unit 33, a selecting unit 34, and a transmitting unit 35.
  • the determining unit 30 is configured to determine, by using a null trapping width algorithm, a transmission weight of a downlink signal of each user terminal when two or more user terminals are at respective angles of arrival.
  • the storage unit 31 is configured to store a transmission weight corresponding to a downlink signal of each user terminal when two or more user terminals are at respective angles of arrival.
  • the receiving unit 32 is configured to receive the angle of arrival information reported by the user terminal.
  • the grouping unit 33 is configured to group the user terminals according to the angle of arrival information received by the receiving unit 32.
  • the principle of grouping is: For a 4-antenna FDD system, the difference between the angles of arrival of the user terminals is greater than or equal to 20 degrees. When it is divided into one group, preferably, for a 4-antenna FDD system, when the difference between the angles of arrival of the user terminals is greater than 40 degrees, it is divided into one group; for the 8-antenna FDD system, the user terminal When the difference between the corresponding angles of arrival is greater than or equal to 10 degrees, they are grouped into one group. Preferably, for an 8-antenna FDD system, when the difference between the angles of arrival of the user terminals is greater than 20 degrees, Divided into a group.
  • the selecting unit 34 is configured to select a corresponding transmission weight for the downlink signals of each user terminal in the group according to the angle of arrival information of each user terminal in each group.
  • the transmitting unit 35 is configured to multiply and transmit the transmission weight selected by the selection unit by the downlink data stream of the user terminal corresponding to the transmission weight.
  • the multi-user beamforming device based on the frequency division duplex system further includes: a notification unit 36, configured to notify the arrival angle information of all user terminals in the user terminal group divided by the grouping unit 33. Each user terminal in the group.
  • the notification unit 36 is an optional component of the multi-user beamforming device based on the frequency division duplex system of the present embodiment.
  • the I-shaped device is designed to realize the multi-user beam I-form method based on the frequency division duplex system shown in FIG. 1, and the multi-user beam I-shaped device based on the frequency division duplex system shown in FIG.
  • the implementation functions of the processing unit can be understood with reference to the related description in the method shown in FIG. 1.
  • the function of each unit in the multi-user beam I-shaped device based on the frequency division duplex system shown in FIG. 3 can be realized by a program running on a processor, or can be realized by a specific logic circuit, for example,
  • the storage unit 31 can be realized by various memories such as a flash memory, and the receiving unit 32 is realized by a receiving antenna processing system.
  • a multi-user beamforming apparatus based on a frequency division duplex system is provided.
  • 4 is a schematic structural diagram of a multi-user beamforming device based on a frequency division duplex system according to Embodiment 2 of the present invention. As shown in FIG. 4, the multi-user beam assignment based on the frequency division duplex system in this embodiment is shown in FIG.
  • the shaped device includes: a first determining unit 40, a storage unit 41, a receiving unit 42, a second determining unit 43, and a demodulating unit 44.
  • the first determining unit 40 is configured to determine, by using a null trapping width algorithm, a transmission weight of a downlink signal of each user terminal when two or more user terminals are at respective angles of arrival.
  • the storage unit 41 is configured to store a transmission weight corresponding to each downlink signal of each user terminal when two or more user terminals are at respective angles of arrival.
  • the receiving unit 42 is configured to receive the downlink signal sent by the network side and the angle of arrival information of each user terminal in the user terminal group on the network side.
  • the second determining unit 43 is configured to determine, according to the angle of arrival information of each user terminal in the group in which the user terminal is located, the transmission weight used by the downlink signal received by the receiving unit 42.
  • the demodulation unit 44 is configured to demodulate the downlink signal using the transmission weight determined by the second determining unit 43.
  • the multi-user beamforming device based on the frequency division duplex system of the present embodiment further includes: a measuring unit 45, and an upper unit 46.
  • the measuring unit 45 is configured to measure the angle of arrival of the user terminal according to the downlink signal received by the receiving unit 42.
  • the upper unit 46 is used to report the angle of arrival information measured by the measuring unit 45 to the network side. As shown in FIG.
  • the multi-user beamforming device based on the frequency division duplex system further includes: an identifying unit 47, configured to assign a binary number of the identification value to the quantized value of the angle of arrival, each of the angle of arrival The quantized value corresponds to an identifier consisting of the identified binary number.
  • the measuring unit 45 selects the closest value of the angle of arrival angle as the measured value, and the upper unit 46 reports the identifier of the binary value corresponding to the measured value to the network side.
  • the measuring unit 45, the upper unit 46, and the identifying unit 47 are optional components of the multi-user beam I-shaped device based on the frequency division duplex system of the present embodiment, wherein the measuring unit 45 And the upper 4 unit 46 must be used at the same time.
  • the multi-user beam I-shaped device based on the frequency division duplex system shown in FIG. 4 is designed to implement the multi-user beam I method based on the frequency division duplex system shown in FIG. 2 .
  • the implementation function of each processing unit in the multi-user beam I-shaped device based on the frequency division duplex system shown in FIG. 4 can be understood by referring to the related description in the method shown in FIG. 2.
  • Figure 4 is based on frequency division double
  • the function of each unit in the multi-user beam I-shaped device of the system can be realized by a program running on the processor, or can be realized by a specific logic circuit.
  • the storage unit 41 therein can be implemented by various memories such as flash memory, and the reporting unit 46 is implemented by transmitting an antenna processing system.
  • the multi-user beamforming method and device based on the frequency division duplex system provided by the invention realizes the application of beamforming to the FDD system, which can reduce the computational burden on the network side and improve the efficiency of beamforming, thereby ensuring The quality of the communication can increase the capacity of the FDD system.
  • the implementation of the present invention does not modify the system architecture and the current processing flow, is easy to implement, facilitates promotion in the technical field, and has strong industrial applicability.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

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Description

基于频分双工系统的多用户波束赋形方法与装置 技术领域 本发明涉及通信领 i或， 具体而言， 涉及一种基于频分双工 （Frequency Division Duplex, 筒称为 FDD ) 系统的多用户波束 I武形 （ beamforming )方法 与装置。 背景技术 多输入多输出 （ Multiple Input and Multiple Output, 筒称为 MIMO ) 系 统由于提高了信道容量而成为长期演进（ Long Term Evolution, 筒称为 LTE ) 系统中一项倍受关注的技术。 在多用户 MIMO模式中， 通过设计合适的发射 天线和接收天线的权值矢量来设计 I武形波束的方向 ,从而区分多用户的信号 , 去除用户间的干 ·ί尤。 波束 I武形的方法通过用户所在方位来区分用户 ,从而可以实现多个用户 复用相同的时间、 频率资源， 对于小天线间距（0.5 1 ) 情况， 更有利于控制 波束的指向。 波束 I武形技术主要是通过控制波束方向来进行工作的， 比较适 合应用于空旷的郊区场景。 波束 I武形可以获得明显的波束能量增益， 可以扩 大小区的覆盖。 在多用户 MIMO模式中， 通过设计合适的发射天线和接收天 线的权值矢量来设计赋形波束的方向， 控制波束的具体形状， 能够在期望方 向形成主瓣， 而且在干 4尤方向形成零陷， 从而去除用户间的干 4尤。 但目前如 何处理多用户之间的波束赋形问题， 尚处于研究之中。 特别是针对如何将波 束赋形应用于 FDD系统中的问题， 相关技术中尚未给出有效地解决方案。 发明内容 针对如何将波束赋形应用于 FDD系统中的问题而提出本发明 , 为此， 本发明的主要目的在于提供一种基于频分双工系统的多用户波束 I武形方法与 装置 , 以实现在 FDD系统中快捷地实现对多用户的下行信号的波束赋形。 为达到上述目的 , 才艮据本发明的一个方面 , 提供了一种基于频分双工系 统的多用户波束 I武形方法。 才艮据本发明的基于频分双工系统的多用户波束赋形方法包括：利用零陷 展宽算法确定两个以上用户终端处于各波达角时各用户终端下行信号的发射 权值， 并存储于网络侧； 以及网络侧根据用户终端上报的波达角信息对用户 终端进行分组 , 并才艮据每组中各用户终端的波达角信息为该组中各用户终端 的下行信号选择对应的发射权值 , 将所选择的发射权值与其对应的用户终端 的下行数据流相乘后通过天线发射。 优选地， 上述方法还包括： 网络侧对用户终端进行分组后， 将每组中所 有用户终端的波达角信息通知该组中的每个用户终端。 优选地， 上述波达角为量化值。 优选地， 为波达角的量化值分配标识的二进制数， 每个波达角的量化值 对应于一个由标识的二进制数组成的标识符。 优选地 , 用户终端测量出波达角角度值后 , 选取最接近的波达角量化值 作为测量值 , 并上 4艮与测量值对应的标识符； 网络侧向用户终端反馈每组中 所有用户终端波达角对应的标识符。 优选地 , 网络侧根据用户终端上报的波达角信息对用户终端进行分组 , 具体为： 对于四天线的频分双工系统， 用户终端上 4艮的波达角之间的差值大 于等于二十度时， 分为一组； 对于八天线的频分双工系统， 用户终端上 4艮的 波达角之间的差值大于等于十度时， 分为一组。 为了实现上述目的 , 才艮据本发明的另一个方面， 提供了一种基于频分双 工系统的多用户波束 I武形方法。 根据本发明的基于频分双工系统的多用户波束赋形方法包括：利用零陷 展宽算法确定两个以上用户终端处于各波达角时各用户终端下行信号的发射 权值， 并存储于各用户终端中； 以及用户终端接收到网络侧所分用户终端组 中各用户终端的波达角信息及下行信号后 , 根据用户终端所在组中各用户终 端的波达角信息确定下行信号所使用的发射权值 , 利用发射权值解调下行信 号。 优选地， 用户终端所在组确定方式为： 对于四天线的频分双工系统， 用 户终端的波达角之间的差值大于等于二十度时， 为一组； 对于八天线的频分 双工系统， 用户终端的波达角之间的差值大于等于十度时， 为一组。 优选地， 上述波达角为量化值。 优选地， 为波达角的量化值分配标识的二进制数， 每个波达角的量化值 对应于一个由标识的二进制数组成的标识符。 优选地 , 用户终端测量出波达角角度值后 , 选取最接近的波达角量化值 作为测量值 , 向网络侧上报测量值对应的标识符； 网络侧向用户终端组中各 用户终端发送每组中所有用户终端波达角对应的标识符。 为了实现上述目的 , 根据本发明的又一个方面， 提供了一种基于频分双 工系统的多用户波束 I武形装置。 才艮据本发明的基于频分双工系统的多用户波束 I武形装置包括： 确定单 元， 用于利用零陷展宽算法确定两个以上用户终端处于各波达角时各用户终 端下行信号的发射权值； 存储单元， 用于存储两个以上用户终端处于各波达 角时各用户终端下行信号所对应的发射权值； 接收单元 , 用于接收用户终端 上报的波达角信息； 分组单元 , 用于根据接收单元所接收的波达角信息对用 户终端进行分组； 选择单元， 用于才艮据每组中各用户终端的波达角信息为该 组中各用户终端的下行信号选择对应的发射权值； 以及发射单元， 用于将选 择单元所选择的发射权值与发射权值对应的用户终端的下行数据流相乘后发 射。 优选地， 上述装置还包括： 通知单元， 用于将分组单元所分用户终端组 中所有用户终端的波达角信息通知该组中的每个用户终端。 优选地 ,分组单元根据接收单元所接收的波达角信息对用户终端的下行 信号进行分组， 具体为： 对于四天线的频分双工系统， 用户终端上 4艮的波达 角之间的差值大于等于二十度时， 用户终端的下行信号分到一组中； 对于八 天线的频分双工系统， 用户终端上 4艮的波达角之间的差值大于等于十度时， 用户终端的下行信号分到一组中。 为了实现上述目的 , 才艮据本发明的再一个方面， 提供了一种基于频分双 工系统的多用户波束 I武形装置。 才艮据本发明的基于频分双工系统的多用户波束赋形装置包括：第一确定 单元 , 用于利用零陷展宽算法确定两个以上用户终端处于各波达角时各用户 终端下行信号的发射权值； 存储单元， 用于存储两个以上用户终端处于各波 达角时各用户终端下行信号所对应的发射权值； 接收单元， 用于接收网络侧 发送的下行信号以及网络侧所分用户终端组中各用户终端的波达角信息； 第 二确定单元 , 用于根据用户终端所在组中各用户终端的波达角信息确定接收 单元所接收的下行信号所使用的发射权值； 以及解调单元， 用于利用第二确 定单元所确定的发射权值解调下行信号。 优选地， 上述装置还包括： 测量单元， 用于根据接收单元所接收的下行 信号测量用户终端的波达角； 以及上 4艮单元， 用于将测量单元所测量的波达 角信息上报至网络侧。 优选地， 上述波达角为量化值。 优选地， 上述装置还包括： 标识单元， 用于为波达角的量化值分配标识 的二进制数， 每个波达角的量化值对应于一个由标识的二进制数组成的标识 符； 测量单元测量出用户终端的波达角角度值后， 选取最接近的波达角量化 值作为测量值 , 上 4艮单元向网络侧上 4艮测量值对应的标识符。 本发明首先对用户终端所在的波达角进行量化 ,然后再利用零陷展宽算 法计算用户终端组中各用户终端在不同波达角时其下行信号的发射权值， 计 算完毕后分别存储到网络侧和各用户终端中 , 这样 , 在对多用户终端进行波 束赋形时， 根据各用户终端上报的波达角信息以及用户终端数， 根据所存储 的用户终端组中各用户终端所在波达角与用户终端下行信号发射权值的对应 关系， 直接确定出用户终端下行信号的发射权值， 从而不必实时地确定用户 终端组中各用户终端下行信号波束赋形的发射权值， 因此， 可以减轻网络侧 的运算负担， 提升波束赋形的效率， 从而在保证通信质量的同时能够提高 FDD系统的容量。 本发明的其它特征和优点将在随后的说明书中阐述， 并且， 部分地从说 明书中变得显而易见， 或者通过实施本发明而了解。 本发明的目的和其他优 点可通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结构来实 现和获得。 附图说明 此处所说明的附图用来提供对本发明的进一步理解 ,构成本申请的一部 分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的 不当限定。 在附图中： 图 1 为才艮据本发明方法实施例一的基于频分双工系统的多用户波束赋 形方法的流程图； 图 2 为才艮据本发明方法实施例二的基于频分双工系统的多用户波束赋 形方法的流程图； 图 3 为根据本发明装置实施例一的基于频分双工系统的多用户波束赋 形装置的组成结构示意图； 图 4 为根据本发明装置实施例二的基于频分双工系统的多用户波束赋 形装置的组成结构示意图。 具体实施方式 功能相克述 在本发明实施例的技术方案中， 首先对用户终端所在的波达角进行量 化， 然后再利用零陷展宽算法计算用户终端组中各用户终端在不同波达角时 其下行信号的发射权值 , 计算完毕后分别存储到网络侧和各用户终端中 , 这 样， 在对多用户终端进行波束赋形时， 根据各用户终端上报的波达角信息以 及用户终端数 , 才艮据所存储的用户终端组中各用户终端所在波达角与用户终 端下行信号发射权值的对应关系 ,直接确定出用户终端下行信号的发射权值 , 从而不必实时确定用户终端组中各用户终端下行信号波束 I武形的发射权值， 因此， 能够减轻网络侧的运算负担， 提升波束赋形的效率， 从而在保证通信 质量的同时能够提高 FDD系统的容量。 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是， 在 不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互组合。 方法实施例一 根据本发明的实施例 ,提供了一种基于频分双工系统的多用户波束赋形 方法。 图 1 为才艮据本发明方法实施例一的基于频分双工系统的多用户波束赋 形的流程图， 如图 1所示， 本实施例基于频分双工系统的多用户波束赋形方 法包括以下步骤 101至步骤 103: 步骤 101 , 利用零陷展宽算法确定两个以上用户终端处于各波达角时各 用户终端下行信号的发射权值， 并存储于网络侧。 本发明中， 对于用户终端与网络侧（基站）的波达角， 使用量化的方式 来标识。 以三扇区的小区为例， 扇区所覆盖的范围是从 -60° ~ 60° 区间， 用 户终端所在波达角的范围为 120° ,可将用户终端的波达角量化为 10个角度 值， 分别为 -55° 、 -45° 、 -35° 、 -25° 、 -15° 、 -5° 、 5° 、 15° 、 25° 、 35° 、 45° 、 55° 。 需要说明的是， 前述量化角度最好是均分整个扇区的角 度， 以在用户终端测量出实际的波达角后， 选取与前述量化值最接近的作为 其波达角， 并上报网络侧。 本领域技术人员应当理解， 上述的量化值越多， 用户终端所上 4艮的波达角越准确。 为方便标识， 可将波达角量化为 16 个， 各波达角的角度值分别为：
J- 56.25 - 48.75 - 41.25 - 33.75 - 26.25 - 18.75 - 11.25 - 3.751 I 3.75 11.25 18.75 26.25 33.75 41.25 48.75 56.25 J 这样，每个用户终端所在的波达角便可以通过 4bit的二进制符号进行标 识。 才艮据波达角的量化值，确定多用户终端在各种波达角的情形下进行波束 I武形时用户终端下行信号的发射权值。 例如， 对于两个用户终端的下行信号 进行波束 I武形时， 利用零陷展宽算法计算两个用户终端分别在前述 16 个波 达角时各用户终端下行信号的发射权值。 本领域技术人员应当理解， 零陷展 宽算法是一种成熟的波束 I武形算法， 可以对两个以上的用户终端的下行信号 进行波束赋形处理， 使得经过波束赋形后， 下行信号的主瓣方向位于该下行 信号所属用户终端所上 4艮的波达角方向， 下行信号的零陷方向位于其余用户 终端的下行信号的主瓣方向。 这里不再赞述零陷展宽算法的细节。 三个用户 终端的情形 ,也分别确定出进行波束赋形时各用户终端下行信号的发射权值。 将所确定出的用户终端所在的波达角与各用户终端下行信号的发射权 值之间的对应信息存储于网络侧。 步骤 102 , 网络侧根据用户终端上报的波达角信息对用户终端进行分 组 , 并将每组中所有用户终端的波达角信息通知该组中的每个用户终端。
FDD 系统中， 由于上行信道与下行信道所处的频段不同， 网络侧无法 通过上行信道信息而直接获得下行信道信息， 因此， 网络侧无法使用下行信 道矩阵信息获取用户终端的波达角。 但在 FDD 系统中， 却能利用用户终端 完成用户终端与基站之间波达角的测量， 用户终端才艮据公共导频完成对下行 信号的信道估计， 从而获取下行信道矩阵信息， 并根据下行信道矩阵信息计 算出该用户终端与发射该下行信号的基站之间的波达角。 本领域技术人员应 当理解， 用户终端才艮据下行信号完成波达角的测量是现有技术， 这里不再给 出具体的测量方式。 用户终端完成波达角的测量之后 ,如何上 4艮波达角信息也是一个棘手的 问题。 为节约上报资源， 本发明采用前述量化波达角方式， 通过上报与量化 波达角对应的标识符来上 4艮所测量出的波达角， 以下对上述过程进行详细说 明。 对于每个量化的波达角角度值 , 使用一个二进制数来标识； 仍以前述在 波达角 -60度 ~ 60度之间的范围、 量化成前述的 16种值为例， 则使用 4比特 二进制字符即可标识以上 16种波达角角度值， 这 16种波达角角度值分别对 应于 "0000" 至 " 1111" 的二进制数。 例如， 如果用户终端测量出实际的波 达角值为 10度， 则选择最接近 10度的量化角度 11.25度作为测量值， 并将 其上报网络侧， 此时， 选取 "0110" 的二进制数上报至网络侧（基站）。 由于 系统中对上报的二进制数与用户终端测量出的波达角值之间的对应关系进行 了约定， 因此基站侧接收到 "0110" 的数值后， 即可确定出用户终端的波达 角为 11.25度。可使用原来 载预编码矩阵指示（Precoding Matrix Indication, 筒称为 PMI )信息的资源来承载波达角信息。 当用户终端所测量的波达角值 位于两个量化值之间时 , 上报左右两个量化值对应的二进制数均可。 网络侧才艮据每个用户终端上 4艮的波达角 , 对待发送的下行信号进行分 组， 分组的原则主要是考虑该组内的下行信号之间不会造成干扰， 至少， 在 波束赋形后的下行信号的主瓣上， 不能有来自其他下行信号旁瓣的干扰， 本 发明通过零陷展宽算法 , 可保证用户终端组内每个用户终端的下行信号的零 陷位于其他用户终端的下行信号的主瓣上， 以使用户终端组内各下行信号之 间的干扰降低到最小。 考虑到本发明波束赋形的要求， 如果下行信号之间的 主瓣方向的角度差较小 , 则无法实现其他下行信号的零陷位于某下行信号的 主瓣上这一要求， 因此， 本发明对下行信号进行分组的原则是： 对于 4天线 的 FDD系统， 用户终端对应的波达角之间的差值大于等于 20度时， 分为一 组， 优选地， 对于 4天线的 FDD 系统而言， 用户终端对应的波达角之间的 差值大于 40度时， 分为一组； 对于 8天线的 FDD系统， 用户终端对应的波 达角之间的差值大于等于 10度时， 分为一组， 优选地， 对于 8天线的 FDD 系统而言， 用户终端对应的波达角之间的差值大于 20度， 分为一组。 确定好用户终端组后 ,将该用户终端组中所有用户终端的波达角信息分 别通知给该用户终端组中各用户终端。 通知的方式可采用前述用户终端上 4艮 波达角信息的方式， 即， 通过所量化的波达角对应的二进制字符来通知用户 终端组中各用户终端。 步骤 103 , 网络侧根据每组中各用户终端的波达角信息为该组中各用户 终端的下行信号选择对应的发射权值 , 将所选择的发射权值与其对应的用户 终端的下行数据流相乘后通过天线发射。 网络侧利用所分的用户终端组中各用户终端所在的波达角信息 ,根据网 络侧所存储的用户终端组中各用户终端所在的波达角与其下行信号发射权值 之间的对应关系， 为用户终端组中各用户终端下行信号确定发射权值， 向用 户终端发射下行数据信号之前 , 用所选择的发射权值与待发射的下行数据信 号相乘， 再加载公共导频 （Common Reference Signal, 筒称为 CRS ), 通过 网络侧的发射天线进行发送， 即完成了用户终端组的下行波束赋形。 网络侧所选择的发射权值， 已经是经过零陷展宽算法计算所得出的， 因 此， 与用户终端组中的下行数据信号相乘后， 即已形成下行波束 I武形。 由于 事先已进行波束 I武形的计算处理， 因此， 网络侧不必为用户终端组中各用户 终端的下行信号作实时波束赋形的计算， 仅为其选择波束赋形的发射权值即 可， 因 it匕， 该方案可以减轻网络侧的运算负担。 本领域技术人员应当理解，图 1所示方法适用于 FDD系统的网络侧（基 站）。 方法实施例二 根据本发明的实施例 ,提供了一种基于频分双工系统的多用户波束赋形 方法。 图 2 为才艮据本发明方法实施例二的基于频分双工系统的多用户波束赋 形方法流程图， 如图 2所示， 本实施例基于频分双工系统的多用户波束赋形 方法包括以下步骤 201至步骤 202: 步骤 201 , 利用零陷展宽算法确定两个以上用户终端处于各波达角时各 用户终端下行信号的发射权值 , 并存储于各用户终端中。 本实施例中， 对于用户终端与网络侧（基站）的波达角 , 使用量化的方 式来标识。 本步骤的实现细节参见前述步骤 101 , 与步骤 101所唯一不同的 是， 本实施例将所确定出的用户终端组中各用户终端所在的波达角与各用户 终端下行信号的发射权值之间的对应信息存储于 FDD 系统中的所有用户终 端中。 这里， 用户终端组中各用户终端所在的波达角与各用户终端下行信号 的发射权值之间的对应信息， 是作为配置信息配置于用户终端中的， 即， 在 用户终端出厂之前即行配置， 或者在用户终端入网时进行配置。 步骤 202, 用户终端接收到网络侧所分的用户终端组中各用户终端的波 达角信息及下行信号后 , 根据用户终端所在组中各用户终端的波达角信息确 定下行信号所使用的发射权值， 利用发射权值解调下行信号。 用户终端接收到网络侧所分的用户终端组中各用户终端的波达角信息 后， 确定网络侧所发送的下行信号使用了波束赋形处理， 此时， 根据网络侧 所分的用户终端组中各用户终端的波达角信息， 确定出网络侧为当前下行信 号所用的发射权值 , 对所接收的下行信号进行解调。 本实施例基于频分双工系统的多用户波束赋形方法还包括步骤：用户终 端测量出波达角角度值后 , 选取最接近的波达角量化值作为测量值 , 向网络 侧上报与测量值对应的由二进制数组成的标识符； 网络侧向用户终端组中各 用户终端发送每组中所有用户终端波达角对应的标识符。 用户终端上 4艮波达 角信息的方式参见前述步骤 102中的相关描述， 这里不再赞述。 网络侧通知 用户终端组中所有用户终端的波达角信息时 , 同样使用步骤 102中所描述的 二进制标识符来实现。 用户终端才艮据标识符与波达角角度值之间的对应关系 即可确定出网络侧所通知的波达角角度值。 本领域技术人员应当理解， 图 2所示方法适用于 FDD系统的用户终端 侧。 才艮据本发明实施例， 还提供了一种计算机可读介质， 该计算机可读介质 上存储有计算机可执行的指令， 当该指令被计算机或处理器执行时， 使得计 算机或处理器执行如图 1和图 2所示的各步骤的处理， ύ选地， 可以执行上 述的方法实施例。 装置实施例一 根据本发明的实施例 ,提供了一种基于频分双工系统的多用户波束赋形 装置。 图 3 为才艮据本发明装置实施例一基于频分双工系统的多用户波束赋形 装置的组成结构示意图， 如图 3所示， 本实施例基于频分双工系统的多用户 波束赋形装置包括： 确定单元 30、 存储单元 31、 接收单元 32、 分组单元 33、 选择单元 34和发射单元 35。 其中， 确定单元 30用于利用零陷展宽算法确定 两个以上用户终端处于各波达角时各用户终端下行信号的发射权值。 存储单 元 31 用于存储两个以上用户终端处于各波达角时各用户终端下行信号所对 应的发射权值。 接收单元 32 用于接收用户终端上报的波达角信息。 分组单 元 33用于根据接收单元 32所接收的波达角信息对用户终端进行分组， 分组 的原则是： 对于 4天线的 FDD 系统， 用户终端对应的波达角之间的差值大 于等于 20度时， 分为一组， 优选地， 对于 4天线的 FDD系统而言， 用户终 端对应的波达角之间的差值大于 40度时， 分为一组； 对于 8天线的 FDD系 统， 用户终端对应的波达角之间的差值大于等于 10 度时， 分为一组， 优选 地， 对于 8天线的 FDD 系统而言， 用户终端对应的波达角之间的差值大于 20度时， 分为一组。 选择单元 34用于才艮据每组中各用户终端的波达角信息 为该组中各用户终端的下行信号选择对应的发射权值。 发射单元 35 用于将 选择单元所选择的发射权值与发射权值对应的用户终端的下行数据流相乘后 发射。 如图 3 所示， 本实施例基于频分双工系统的多用户波束赋形装置还包 括： 通知单元 36, 用于将分组单元 33所分用户终端组中所有用户终端的波 达角信息通知该组中的每个用户终端。 本领域技术人员应当理解 , 通知单元 36为本实施例基于频分双工系统的多用户波束赋形装置的可选部件。 本领域技术人员应当理解，图 3所示的基于频分双工系统的多用户波束
I武形装置是为实现图 1所示基于频分双工系统的多用户波束 I武形方法而设计 的， 图 3所示基于频分双工系统的多用户波束 I武形装置中的各处理单元的实 现功能可参照图 1所示的方法中的相关描述而理解。 图 3所示的基于频分双 工系统的多用户波束 I武形装置中各单元的功能可通过运行于处理器上的程序 而实现， 也可通过具体的逻辑电路而实现， 如， 其中的存储单元 31 可通过 闪存等各种存储器来实现， 接收单元 32通过接收天线处理系统来实现。 装置实施例二 根据本发明的实施例 ,提供了一种基于频分双工系统的多用户波束赋形 装置。 图 4 为才艮据本发明装置实施例二基于频分双工系统的多用户波束赋形 装置的组成结构示意图， 如图 4所示， 本实施例基于频分双工系统的多用户 波束赋形装置包括： 第一确定单元 40、 存储单元 41、 接收单元 42、 第二确 定单元 43和解调单元 44。 其中， 第一确定单元 40用于利用零陷展宽算法确 定两个以上用户终端处于各波达角时各用户终端下行信号的发射权值。 存储 单元 41 用于存储两个以上用户终端处于各波达角时各用户终端下行信号所 对应的发射权值。 接收单元 42 用于接收网络侧发送的下行信号以及网络侧 所分用户终端组中各用户终端的波达角信息。 第二确定单元 43 用于才艮据用 户终端所在组中各用户终端的波达角信息确定接收单元 42 所接收的下行信 号所使用的发射权值。 解调单元 44用于利用第二确定单元 43所确定的发射 权值解调下行信号。 如图 4 所示， 本实施例基于频分双工系统的多用户波束赋形装置还包 括： 测量单元 45、 和上 4艮单元 46。 其中， 测量单元 45用于才艮据接收单元 42 所接收的下行信号测量用户终端的波达角。 上 4艮单元 46用于将测量单元 45 所测量的波达角信息上报至网络侧。 如图 4 所示， 本实施例基于频分双工系统的多用户波束赋形装置还包 括： 标识单元 47, 用于为波达角的量化值分配标识的二进制数， 每个波达角 的量化值对应于一个由标识的二进制数组成的标识符。 测量单元 45 测量出 用户终端的波达角角度值后 , 选取最接近的波达角量化值作为测量值 , 上 4艮 单元 46向网络侧上报测量值对应的由二进制数组成的标识符。 本领域技术人员应当理解， 测量单元 45、 上 4艮单元 46、 及标识单元 47 均为本实施例基于频分双工系统的多用户波束 I武形装置的可选部件， 其中， 测量单元 45及上 4艮单元 46须同时使用。 本领域技术人员应当理解，图 4所示的基于频分双工系统的多用户波束 I武形装置是为实现图 2所示基于频分双工系统的多用户波束 I武形方法而设计 的， 图 4所示基于频分双工系统的多用户波束 I武形装置中的各处理单元的实 现功能可参照图 2所示的方法中的相关描述而理解。 图 4所示的基于频分双 工系统的多用户波束 I武形装置中各单元的功能可通过运行于处理器上的程序 而实现， 也可通过具体的逻辑电路而实现。 如， 其中的存储单元 41 可通过 闪存等各种存储器来实现， 上报单元 46通过发送天线处理系统来实现。 通过本发明提供的基于频分双工系统的多用户波束赋形方法与装置 ,实 现了将波束赋形应用于 FDD 系统， 能够减轻网络侧的运算负担， 提升波束 赋形的效率 , 从而在保证通信质量的同时能够提高 FDD系统的容量。 本发明的实现没有对系统架构和目前的处理流程修改， 易于实现， 便于 在技术领域中进行推广， 具有较强的工业适用性。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本 领域的技术人员来说， 本发明可以有各种更改和变化。 凡在本发明的^^申和 原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书
1. 一种基于频分双工系统的多用户波束 I武形方法， 其特征在于， 包括： 利用零陷展宽算法确定两个以上用户终端处于各波达角时各用 户终端下行信号的发射权值， 并存储于网络侧； 以及
网络侧根据用户终端上报的波达角信息对用户终端进行分组 , 并 根据每组中各用户终端的波达角信息为该组中各用户终端的下行信号 选择对应的发射权值 , 将所选择的发射权值与其对应的用户终端的下 行数据流相乘后通过天线发射。
2. 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括：
网络侧对用户终端进行分组后 , 将每组中所有用户终端的波达角 信息通知该组中的每个用户终端。
3. 才艮据权利要求 1或 2所述的方法 , 其特征在于 , 所述波达角为量化值。
4. 根据权利要求 3所述的方法， 其特征在于 , 为所述波达角的量化值分 配标识的二进制数， 每个波达角的量化值对应于一个由所述标识的二 进制数组成的标识符。
5. 根据权利要求 4所述的方法， 其特征在于 , 所述用户终端测量出波达 角角度值后 , 选取最接近的波达角量化值作为测量值 , 并上 4艮与所述 测量值对应的标识符； 网络侧向用户终端反馈每组中所有用户终端波 达角对应的标识符。
6. 根据权利要求 3所述的方法 , 其特征在于 , 所述网络侧根据用户终端 上 ·ί艮的波达角信息对用户终端进行分组， 具体为：
对于四天线的频分双工系统， 用户终端上报的波达角之间的差值 大于等于二十度时， 分为一组； 对于八天线的频分双工系统， 用户终端上 4艮的波达角之间的差值 大于等于十度时， 分为一组。
7. 一种基于频分双工系统的多用户波束武形方法， 其特征在于， 包括： 利用零陷展宽算法确定两个以上用户终端处于各波达角时各用 户终端下行信号的发射权值， 并存储于各用户终端中； 以及
用户终端接收到网络侧所分用户终端组中各用户终端的波达角 信息及下行信号后， 才艮据所述用户终端所在组中各用户终端的波达角 信息确定所述下行信号所使用的发射权值， 利用所述发射权值解调所 述下行信号。
8. 根据权利要求 7所述的方法 , 其特征在于 , 所述用户终端所在组确定 方式为：
对于四天线的频分双工系统， 用户终端的波达角之间的差值大于 等于二十度时， 为一组；
对于八天线的频分双工系统， 用户终端的波达角之间的差值大于 等于十度时， 为一组。
9. 根据权利要求 8所述的方法， 其特征在于， 所述波达角为量化值。
10. 才艮据权利要求 9所述的方法， 其特征在于 , 为所述波达角的量化值分 配标识的二进制数， 每个波达角的量化值对应于一个由所述标识的二 进制数组成的标识符。
11. 根据权利要求 10所述的方法， 其特征在于 , 所述用户终端测量出波达 角角度值后 , 选取最接近的波达角量化值作为测量值 , 向网络侧上报 所述测量值对应的标识符； 网络侧向用户终端组中各用户终端发送每 组中所有用户终端波达角对应的标识符。
12. 一种基于频分双工系统的多用户波束 I武形装置， 其特征在于， 包括： 确定单元， 用于利用零陷展宽算法确定两个以上用户终端处于各 波达角时各用户终端下行信号的发射权值；
存储单元， 用于存储两个以上用户终端处于各波达角时各用户终 端下行信号所对应的发射权值；
接收单元 , 用于接收用户终端上报的波达角信息； 分组单元 , 用于根据所述接收单元所接收的波达角信息对用户终 端进行分组； 选择单元 , 用于根据每组中各用户终端的波达角信息为该组中各 用户终端的下行信号选择对应的发射权值； 以及
发射单元， 用于将所述选择单元所选择的发射权值与所述发射权 值对应的用户终端的下行数据流相乘后发射。
13. 根据权利要求 12所述的装置， 其特征在于， 所述装置还包括：
通知单元， 用于^1所述分组单元所分用户终端组中所有用户终端 的波达角信息通知该组中的每个用户终端。
14. 根据权利要求 12或 13所述的装置， 其特征在于， 所述分组单元根据 所述接收单元所接收的波达角信息对用户终端的下行信号进行分组， 具体为：
对于四天线的频分双工系统， 用户终端上报的波达角之间的差值 大于等于二十度时， 所述用户终端的下行信号分到一组中； 对于八天线的频分双工系统， 用户终端上报的波达角之间的差值 大于等于十度时 , 所述用户终端的下行信号分到一组中。
15. 一种基于频分双工系统的多用户波束 I武形装置， 其特征在于， 包括： 第一确定单元， 用于利用零陷展宽算法确定两个以上用户终端处 于各波达角时各用户终端下行信号的发射权值；
存储单元， 用于存储两个以上用户终端处于各波达角时各用户终 端下行信号所对应的发射权值；
接收单元， 用于接收网络侧发送的下行信号以及网络侧所分用户 终端组中各用户终端的波达角信息；
第二确定单元 , 用于才艮据所述用户终端所在组中各用户终端的波 达角信息确定所述接收单元所接收的下行信号所使用的发射权值； 以 及
解调单元， 用于利用所述第二确定单元所确定的发射权值解调所 述下行信号。
16. 根据权利要求 15所述的装置， 其特征在于， 所述装置还包括： 测量单元， 用于才艮据所述接收单元所接收的下行信号测量所述用 户终端的波达角； 以及
上 4艮单元， 用于将所述测量单元所测量的波达角信息上 4艮至网络 侧。
17. 根据权利要求 15或 16所述的装置， 其特征在于， 所述波达角为量化 值。
18. 根据权利要求 17所述的装置， 其特征在于， 所述装置还包括：
标识单元， 用于为所述波达角的量化值分配标识的二进制数 , 每 个波达角的量化值对应于一个由所述标识的二进制数组成的标识符； 所述测量单元测量出用户终端的波达角角度值后 , 选取最接近的波达 角量化值作为测量值 , 所述上 4艮单元向网络侧上 4艮所述测量值对应的 标识符。
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