WO2016000451A1 - 基于mimo的导频分配方法和装置 - Google Patents

基于mimo的导频分配方法和装置 Download PDF

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Publication number
WO2016000451A1
WO2016000451A1 PCT/CN2015/072233 CN2015072233W WO2016000451A1 WO 2016000451 A1 WO2016000451 A1 WO 2016000451A1 CN 2015072233 W CN2015072233 W CN 2015072233W WO 2016000451 A1 WO2016000451 A1 WO 2016000451A1
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Prior art keywords
user terminal
matching
weight
sector
determining
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PCT/CN2015/072233
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English (en)
French (fr)
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杨晶
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华为技术有限公司
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a MIMO-based pilot allocation method and apparatus.
  • multiple-input multiple-output is usually divided into single-user multiple input multiple output (Single-User MIMO, abbreviated as SU-MIMO) and multi-user multiple input multiple output (Multi-User MIMO).
  • Single-User MIMO Single-user multiple input multiple output
  • Multi-User MIMO multi-user multiple input multiple output
  • SU-MIMO refers to a point-to-point antenna link between a base station and a user.
  • MU-MIMO means that several users simultaneously communicate with one base station using the same time domain frequency domain resources. Since MU-MIMO can simultaneously transmit multiple spatially multiplexed data streams to different users, the gain of MU-MIMO is particularly obvious as the number of base station transmit antennas increases.
  • the number of data streams is MIN (NTx, NMs*NRx), where NTx is the number of antennas transmitted by the base station, NRx is the number of antennas received by the user, NMs is the number of users in the sector, and MIN is the smallest of the two numbers. Value. It can be seen that with the increase of the number of transmitting antennas of the base station, in order to obtain a larger capacity gain, the demand for multiplexing more data streams is stronger, which makes the gain of MU-MIMO particularly obvious.
  • the total number of orthogonal demodulation pilot signals (DMRS) ports that MU-MIMO can apply is two (for example, the two ports can be represented as port 7 and port 8).
  • DMRS orthogonal demodulation pilot signals
  • the two pilot ports can only limit the maximum number of layers (ie, the number of data streams) of the largest pair of users to no more than 4 layers (2 orthogonal pilot ports 7 and port 8, the same pilot port)
  • the two scrambling codes On the two scrambling codes), when two dual-stream users are paired, although considering port 7 and There are also two scrambling codes on port8, but the pilots distinguished by the scrambling code are not guaranteed to be orthogonal.
  • the scrambling code-differentiated pilots cannot The orthogonality is guaranteed. Therefore, the interference of the DMRS between users who simultaneously transmit pilots with the same pilot port is serious, resulting in inaccurate DMRS channel estimation and demodulation performance.
  • the embodiment of the invention provides a MIMO-based pilot allocation method and device, which implements spatial multiplexing of pilots, which breaks the limitation of the maximum number of paired users in the prior art, and effectively improves the demodulation performance.
  • a first aspect of the present invention provides a MIMO-based pilot allocation method, including:
  • the total number of DMRS ports of the demodulation pilot signal corresponding to the sector to be processed is smaller than the total number of beams on the sector to be processed, grouping the beams on the processing sector according to a preset time sequence to obtain at least two first packets, and And respectively, for each of the beams in the first group, number the beams according to the preset time sequence;
  • a matching beam corresponding to each user terminal on the to-be-processed sector is determined, and a DMRS port matched by the user terminal is determined according to the DMRS port allocated by the matching beam.
  • the method further includes: determining that different user terminals corresponding to the same one of the matching beams in the first group use different frequency domain resources.
  • the determining, by the determining, the matching beam corresponding to each user terminal on the to-be-processed sector, respectively, to determine a matching DMRS port of the user terminal specifically include:
  • the DMRS port corresponding to the corresponding matching beam is determined as the DMRS port matched by the user terminal.
  • Determining a matching beam corresponding to each user terminal on the to-be-processed sector to determine a matching DMRS port of the user terminal specifically:
  • the DMRS port corresponding to the corresponding matching beam is determined as the DMRS port matched by the user terminal.
  • the acquiring the first weight and each beam on the to-be-processed sector Determining a matching beam corresponding to the user terminal, and determining a matching beam corresponding to the user terminal, including:
  • the rank corresponding to the user terminal is equal to 1, determining a matching beam corresponding to the user terminal, where a correlation coefficient between the first weight and the second weight corresponding to the matching beam is greater than the first a cross-correlation coefficient of a second weight corresponding to a beam other than the matching beam; or
  • the beam corresponding to the first N cross-correlation numbers is used as the matching beam corresponding to the user terminal, in descending order of the cross-correlation coefficient;
  • N is a positive integer and N is greater than or equal to 2.
  • the determining, by the determining, the matching beam corresponding to each user terminal on the to-be-processed sector, respectively, to determine a matching DMRS port of the user terminal specifically include:
  • the DMRS port corresponding to the corresponding matching beam is determined as the DMRS port matched by the user terminal.
  • the power corresponding to the reference signal is received according to the beam corresponding to the user terminal, and the user terminal corresponds to
  • the determining the matching beam corresponding to the user terminal includes:
  • the matched beam of the user terminal is one, and the matched beam corresponding to the user terminal is determined, where the received power corresponding to the reference beam receiving the reference signal is greater than Receiving, by the other beam corresponding to the user terminal, the received power corresponding to the reference signal; or
  • the received power corresponding to the reference signal received by the beam corresponding to the user terminal is sorted in order from small to large, and is sorted into the first N received powers.
  • Corresponding beam is used as a matching beam corresponding to the user terminal;
  • N is a positive integer and is greater than or equal to 2.
  • the current channel information of the user terminal is matched for each user terminal on the to-be-processed sector.
  • the first weight specifically includes:
  • the precoding matrix reported by the user terminal in the precoding manner indicates the PMI and the precoding weight obtained according to the PMI.
  • the calculating respectively, obtaining the first weight corresponding to each beam on the to-be-processed sector After the cross-correlation of the second weight, the method further includes:
  • the matching beam corresponding to the terminal includes:
  • the obtained average channel covariance matrix and each beam on the to-be-processed sector are After the corresponding second weight is calculated, after the power corresponding to the beam corresponding to the user terminal is received, the method further includes:
  • a second aspect of the present invention provides a MIMO-based pilot allocation apparatus, including:
  • the total number of demodulation pilot signals corresponding to the to-be-processed sector is smaller than the total number of beams on the sector to be processed, and the beams on the processing sector are grouped according to a preset time-sequence order, and at least two a group
  • a number processing module configured to respectively number the beams in each of the first packets according to the preset time sequence
  • a port allocation module configured to respectively allocate a corresponding DMRS port for each beam on each of the first packets; wherein, the DMRS ports corresponding to the beams in each of the first packets are different; In the first group, beams with the same number are assigned to the same DMRS port;
  • a determining module configured to respectively determine a matching beam corresponding to each user terminal on the to-be-processed sector, and determine a DMRS port matched by the user terminal according to the DMRS port allocated by the matching beam.
  • the determining module includes:
  • a matching beam determining unit configured to determine, for each user terminal on the to-be-processed sector, a matching beam corresponding to the user terminal according to a preset principle and a rank corresponding to the user terminal;
  • a port determining unit configured to determine, for each user terminal, a DMRS port corresponding to the corresponding matching beam as a DMRS port matched by the user terminal.
  • the determining module includes:
  • a weight processing unit configured to acquire, for each user terminal on the to-be-processed terminal, a first weight that matches current channel information of the user terminal, and separately calculate and obtain the first weight and the Determining a cross-correlation coefficient of a second weight corresponding to each beam on the processed sector;
  • a matching beam determining unit configured to: according to the correlation coefficient between the acquired first weight and a second weight corresponding to each beam on the to-be-processed sector, and a rank corresponding to the user terminal, Determining a matching beam corresponding to the user terminal;
  • a port determining unit configured to determine, for each user terminal, a DMRS port corresponding to the corresponding matching beam as a DMRS port matched by the user terminal.
  • the matching beam determining unit is specifically configured to determine the user terminal if a rank corresponding to the user terminal is equal to 1. Corresponding one of the matching beams, wherein a correlation coefficient between the first weight and a second weight corresponding to the matching beam is greater than a first correspondence corresponding to a beam other than the matching beam The cross-correlation of two weights; or,
  • the matching beam determining unit is specifically configured to: if the rank corresponding to the user terminal is greater than 1, the beam corresponding to the first N cross-correlation numbers is used as the user terminal according to the order of the mutual relationship number Matched beam
  • N is a positive integer and N is greater than or equal to 2.
  • the determining module includes:
  • An acquiring unit configured to acquire, for each user terminal on the to-be-processed sector, an average channel covariance moment on a resource block occupied by a reference signal currently received by the user terminal Array, according to the obtained average channel covariance matrix and the second weight corresponding to each beam on the to-be-processed sector, respectively calculating and acquiring the beam corresponding to the user terminal to receive the reference signal Corresponding power
  • a matching beam determining unit configured to determine a matching beam corresponding to the user terminal according to a power corresponding to the reference signal received by the user terminal, and a rank corresponding to the user terminal;
  • a port determining unit configured to determine, for each user terminal, a DMRS port corresponding to the corresponding matching beam as a DMRS port matched by the user terminal.
  • the matching beam determining unit is specifically configured to: if the rank corresponding to the user terminal is equal to 1, the user terminal The matching beam is one, and the matched beam corresponding to the user terminal is determined, where the received power corresponding to the reference beam receiving the reference signal is greater than other beams corresponding to the user terminal except the matched beam. Receiving the received power corresponding to the reference signal; or
  • the matching beam determining unit is specifically configured to: if the rank corresponding to the user terminal is greater than 1, the received power corresponding to the reference signal received by the beam corresponding to the user terminal is sorted in order from small to large, and Sorting the beams corresponding to the top N received powers as matching beams corresponding to the user terminals;
  • N is a positive integer and is greater than or equal to 2.
  • the weight processing unit is further configured to:
  • the precoding matrix reported by the user terminal in the precoding manner indicates the PMI and the precoding weight obtained according to the PMI.
  • the weight processing unit is further configured to separately calculate and obtain an average value of the cross-correlation coefficient, and according to the The average of the number of correlations is time-domain filtered by the number of correlations wave;
  • the matching beam determining unit is further configured to determine, according to the time-domain filtered cross-correlation coefficient and the rank corresponding to the user terminal, a matching beam corresponding to the user terminal.
  • the acquiring unit is further configured to perform, by using a beam corresponding to the user terminal, the power corresponding to the reference signal Time domain filtering
  • the matching beam determining unit is further configured to determine a matching beam corresponding to the user terminal according to the filtered power and the rank corresponding to the user terminal.
  • a third aspect of the present invention provides a base station, including: a memory, configured to store an instruction;
  • a processor coupled to the memory, the processor configured to execute instructions stored in the memory, and the processor configured to perform a MIMO based pilot allocation method as described above.
  • the MIMO-based pilot allocation method and apparatus provided in this embodiment, if the total number of DMRS ports corresponding to the to-be-processed sector is smaller than the total number of beams on the to-be-processed sector, the beam grouping on the processed sector is processed according to a preset time-sequence.
  • each The DMRS ports corresponding to the beams in the first group are all different, and the DMRS ports corresponding to the beams with the same number in all the first packets are the same, and the matching beams corresponding to each user terminal on the sector to be processed are respectively determined.
  • the DMRS port matched by the user terminal is determined by the matching beam, thereby realizing spatial multiplexing of the pilot, which breaks the limitation of the maximum number of paired users in the prior art.
  • the two user terminals corresponding to the two beam coverage areas allocating the same DMRS port are spatially far apart, so the two user terminals are multiplexed one by one.
  • the interference on the pilot is not serious, which effectively improves the demodulation performance.
  • FIG. 1 is a flowchart of a MIMO-based pilot allocation method according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of a MIMO-based pilot allocation method according to Embodiment 2 of the present invention.
  • FIG. 3 is a flowchart of a MIMO-based pilot allocation method according to Embodiment 3 of the present invention.
  • FIG. 4 is a flowchart of a MIMO-based pilot allocation method according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic structural diagram of a MIMO-based pilot allocation apparatus according to Embodiment 5 of the present invention.
  • FIG. 6 is a schematic structural diagram of a MIMO-based pilot allocation apparatus according to Embodiment 6 of the present invention.
  • FIG. 7 is a schematic structural diagram of a MIMO-based pilot allocation apparatus according to Embodiment 7 of the present invention.
  • Embodiment 8 is a schematic structural diagram of a MIMO-based pilot allocation apparatus according to Embodiment 8 of the present invention.
  • FIG. 1 is a flowchart of a MIMO-based pilot allocation method according to Embodiment 1 of the present invention. As shown in FIG. 1 , the method in this embodiment includes the following steps.
  • Step 101 If the total number of DMRS ports of the demodulation pilot signal corresponding to the sector to be processed is smaller than the total number of beams on the sector to be processed, group the beams on the processing sector according to a preset time sequence to obtain at least two first Grouping, and respectively for each of the beams in the first group, numbering the beams according to the preset time sequence.
  • the beams on the sectors to be processed are grouped according to a preset time sequence. , obtaining at least two first groups, and each for each first The beams in the packet number the beams in a clockwise order. For example, if the sector to be processed corresponds to 8 DMRS ports and there are 16 beams in the sector to be processed, the 16 beams can be divided into two groups according to a preset hour hand sequence, for example, clockwise order, and each group has 8 beams.
  • first packets I and II Forming two first packets I and II, numbering 8 beams in the first packet I into beam 1 , beam 2, ... beam 8 in a clockwise order, and 8 beams in the first packet II
  • the clockwise sequence is numbered as Beam 1, Beam 2, ..., Beam 8.
  • the beams on the processing sector may also be grouped in a counterclockwise direction, and the beams therein are numbered in a counterclockwise order for each packet.
  • Step 102 Assign a corresponding DMRS port to each of the beams on the first packet, where the DMRS ports corresponding to the beams in each of the first packets are different; and in different first packets, Beams with the same number are assigned to the same DMRS port.
  • Port7 and port8 are two different DMRS ports for transmitting demodulation pilot signals.
  • Step 103 Determine a matching beam corresponding to each user terminal on the to-be-processed sector, and determine a DMRS port matched by the user terminal according to the DMRS port allocated by the matching beam.
  • a plurality of user terminals exist in the to-be-processed sector, and the matching beams corresponding to each user terminal are respectively determined. Since each beam corresponds to one DMRS port, the matching beam corresponding to the user terminal can be used to determine and each The DMRS port that the user terminal matches. In addition, when the same matching beam in the same area corresponds to multiple different user terminals, the user terminals are restricted from sharing the same frequency domain resource. For example, in the first packet I, the beam 1 is covered.
  • the matching beams of the three user terminals are all beam 1, so the three user terminals are allocated the same DMRS port, in order to prevent the three user terminals from using the same DMRS port to send DMRS. Serious interference is generated, which limits the use of different frequency resources by the three user terminals.
  • the technical solution of this embodiment is described in detail by taking 16 beams in the sector to be processed and corresponding to 8 different DMRS ports as an example.
  • the 16 beams are divided into two groups in a clockwise order, each group of 8 beams, forming two first groups I and II, of which, the first The eight beams of packet I are numbered sequentially in the clockwise order as beam 1, beam 2, ..., beam 8, and the eight beams of the first packet II are sequentially numbered as beam 1, beam 2, ... in a clockwise order.
  • Eight DMRS ports are also numbered, namely port7, port8, ..., port 14.
  • a corresponding DMRS port is allocated to each of the first packet I and the first packet II, and the two packets with the same number in the first packet I and the first packet II are assigned the same DMRS port, that is, Beam 1 in a packet I allocates port 7, beam 2 allocates port 8, ..., beam 8 allocates port 14; assigns port 7 to beam 1 in the first packet II, allocates port 8 to beam 2, ..., and distributes port 14 to beam 8.
  • the user terminal A belonging to the beam 1 in the first packet I and the user terminal I belonging to the beam 1 in the first packet II are spatially multiplexed port 7, ..., the user terminal H belonging to the beam 8 and the first in the first packet I
  • the user terminal P belonging to the beam 8 in the packet II spatially multiplexes the port 14.
  • the MIMO-based pilot allocation method provided in this embodiment, if the total number of DMRS ports corresponding to the to-be-processed sector is smaller than the total number of beams on the to-be-processed sector, the beam packets on the processed sector are processed according to a preset time-sequence order, and at least Two first packets, and respectively numbering the beams in each first packet according to a preset time sequence, respectively assigning corresponding DMRS ports to each beam on each first packet, each first The DMRS ports corresponding to the beams in the packet are different, and the DMRS ports corresponding to the beams with the same number in all the first packets are the same, and the matching beams corresponding to each user terminal on the to-be-processed sector are respectively determined, and matched.
  • the beam determines the DMRS port that the user terminal matches, thereby implementing spatial multiplexing of the pilot, which breaks the limitation of the maximum number of paired users in the prior art. Since in all the first packets, the same numbered beams are assigned to the same DMRS port, the allocation is the same. The two user terminals corresponding to the two beam coverage areas of the DMRS port are spatially far apart. Therefore, when the two user terminals multiplex one DMRS port, the interference on the pilot is not serious, and the demodulation performance is effectively improved.
  • FIG. 2 is a flowchart of a MIMO-based pilot allocation method according to Embodiment 2 of the present invention. This embodiment is applied to a scene in which there are several beams in a sector to be processed. As shown in FIG. 2, the method of this embodiment includes the following steps.
  • Step 201 If the total number of DMRS ports of the demodulation pilot signal corresponding to the sector to be processed is smaller than the total number of beams on the sector to be processed, group the beams on the processing sector according to a preset time sequence to obtain at least two first Grouping, and respectively for each of the beams in the first group, numbering the beams according to the preset time sequence.
  • Step 202 Assign a corresponding DMRS port to each beam on each first packet.
  • the DMRS ports corresponding to the beams in each first packet are different; and in all the first packets, the beams with the same number are allocated to the same DMRS port.
  • the steps 201 and 202 are the same as the steps 101 and 102 in the first embodiment, and are not described here.
  • step 202 it is determined that different user terminals corresponding to the same matching beam in the same first packet use different frequency domain resources.
  • Step 203 Determine, for each user terminal on the sector to be processed, a matching beam corresponding to the user terminal according to a preset principle and a rank corresponding to the user terminal.
  • the base station determines the average uplink receiving power of each beam according to the following steps:
  • the base station receives the uplink sounding signal of the UE through m beams, performs channel estimation based on the uplink sounding signal at each antenna port, and determines a corresponding channel coefficient of each antenna port on the subcarrier. For example, for the jth antenna port corresponding to the i th beam of the m beams, the estimated channel coefficients on the subcarrier k are denoted as h i,j,k .
  • the base station calculates the average uplink received power of the channel coefficients of each beam on all antenna ports and all subcarriers.
  • the average uplink received power of the ith beam For example, the average uplink received power of the ith beam
  • N port represents the total number of antenna ports corresponding to m beams
  • N subcarr represents the total number of subcarriers
  • the base station filters the average uplink received power of each beam in the time domain, and accordingly, the time domain counter is incremented by one.
  • the base station determines whether the time domain counter has reached the window length of the time domain filtering.
  • the base station If the time domain counter does not reach the window length of the time domain filtering, the base station returns to perform the above step 1).
  • the average uplink received power of each of the m beams in the time period is taken as the uplink received power of each of the m beams.
  • the uplink sounding signal of the receiving UE is a beam or an antenna port, and the antenna port and the DMRS port are different. If the antenna is a dual-polarized antenna, the number of antenna ports corresponding to each beam is different. 2; if the antenna is a co-polarized antenna, the number of antenna ports corresponding to each beam is 1.
  • Step 204 Determine, for each user terminal, a DMRS port corresponding to the matching beam as a DMRS port matched by the user terminal.
  • the same matching beam in the same area corresponds to multiple different user terminals
  • the user terminals are restricted from sharing the same frequency domain resource.
  • the rank corresponding to the user terminal when the rank corresponding to the user terminal is 1, it is determined that the user terminal corresponds to one matching beam, that is, the DMRS port corresponding to the matching beam is determined as the DMRS port matched by the user terminal; when the rank of the user terminal is greater than 1, That is, when the matching beam corresponding to the user terminal includes multiple beams, according to the method in step 203, multiple beams are selected as the user terminal. The beam is allocated, and the DMRS ports corresponding to the multiple beams are all determined as the matching ports of the user terminal.
  • the matching beam corresponding to the user terminal includes multiple beams
  • j is incremented by 1, if the ith beam and the jth beam are both allocated.
  • the step is repeated until the selected j-th beam corresponds to the DMRS port and the DMRS port corresponding to the ith beam is different.
  • j is initially i+1 and j is an integer less than M.
  • the MIMO-based pilot allocation method provided in this embodiment, if the total number of DMRS ports corresponding to the to-be-processed sector is smaller than the total number of beams on the to-be-processed sector, the beam packets on the processed sector are processed according to a preset time-sequence order, and at least The two first packets divide the plurality of beams on the to-be-processed sector into at least two first packets according to the total number of DMRS ports corresponding to the sector to be processed, and follow the preset hour hand sequence for the beams in each of the first packets.
  • the port can fully utilize the spatial characteristics of the user terminal, so that the optimized beam formed by weighting multiple beams is more in line with the spatial characteristics of the user terminal.
  • FIG. 3 is a flowchart of a MIMO-based pilot allocation method according to Embodiment 3 of the present invention.
  • the non-beam domain scenario is applied, and the matching beam of the user terminal is determined by calculating the weight correlation.
  • the method of this embodiment includes the following steps.
  • Step 301 If the total number of DMRS ports of the demodulation pilot signal corresponding to the sector to be processed is smaller than the total number of beams on the sector to be processed, group the beams on the processing sector according to a preset time sequence to obtain at least two first Grouping, and respectively for each of the beams in the first group, numbering the beams according to the preset time sequence.
  • Step 302 Assign a corresponding DMRS port to each beam on each first packet.
  • the DMRS ports corresponding to the beams in each first packet are different; and in all the first packets, the beams with the same number are allocated to the same DMRS port.
  • the steps 301 and 302 are the same as the steps 101 and 102 in the first embodiment, and are not described here.
  • step 302 it is determined that different user terminals corresponding to the same matching beam in the same first packet use different frequency domain resources.
  • Step 303 Acquire, for each user terminal on the to-be-processed terminal, a first weight that matches the current channel information of the user terminal.
  • Step 304 Calculate a correlation coefficient of the second weight corresponding to each beam on the sector to be processed.
  • Step 305 Determine, according to the correlation coefficient between the obtained first weight and the second weight corresponding to each beam on the to-be-processed sector, and the rank corresponding to the user terminal, determine a matching beam corresponding to the user terminal.
  • the matching beam corresponding to the user terminal is determined according to the correlation coefficient between the obtained first weight and the second weight corresponding to each beam on the to-be-processed sector, and the rank corresponding to the user terminal. Specifically, if the rank corresponding to the user terminal is equal to 1, determining a matching beam corresponding to the user terminal, where the correlation coefficient between the first weight and the second weight corresponding to the matching beam is greater than the first weight and the matching beam a cross-correlation coefficient of the second weight corresponding to the other beams; or, the rank corresponding to the user terminal is greater than 1, and the beams corresponding to the first N mutual coefficients are used in descending order of the cross-correlation coefficient A matching beam corresponding to the user terminal; wherein N is a positive integer, and N is greater than or equal to 2.
  • Step 306 Determine, for each user terminal, a DMRS port corresponding to the matching beam as a DMRS port matched by the user terminal.
  • the same matching beam in the same area corresponds to multiple different user terminals
  • the user terminals are restricted from sharing the same frequency domain resource.
  • the technical solution of this embodiment is described in detail by taking 16 beams in the sector to be processed and the rank of the user terminal being 1 as an example. Presetting a fixed weight for each of the 16 beams, that is, a second weight W m corresponding to each beam, m refers to the mth beam, and W m is the corresponding mth beam. The second weight.
  • the beamforming (Beam Forming, BF for short) of the ith resource block group (RBG) of the user terminal at time t is W BF , that is, the first weight, and W BF is a vector of 1 ⁇ 16.
  • the matching beam includes: a first beam to an Mth beam, wherein the priority of the ith beam is greater than that of the (i+1)th beam Priority, M is an integer, and is greater than 1, i is an integer, greater than or equal to 1, and less than M.
  • the beam having the largest cross-correlation coefficient is used as the first beam of the user terminal, and the beam smaller than the maximum cross-correlation coefficient is used as the second beam of the user terminal, and so on. It should be noted that when the ith beam and the jth beam are allocated the same DMRS port, j is incremented by 1.
  • the step is repeated. Until the selected j-th beam corresponds to the DMRS port and the DMRS port corresponding to the ith beam is different.
  • j is initially i+1 and j is an integer less than M.
  • the step 303 includes: obtaining, for each user terminal on the to-be-processed sector, a first weight of the user terminal that matches the current channel information from the base station side; a weight value is obtained by the base station side according to the sounding reference signal sent by the user terminal, and the channel estimation is used to obtain the channel estimation result, and the obtained BF weight value is calculated according to the result of the channel estimation; or the first weight is the base station side receiving user terminal.
  • Precoding matrix indicator (PMI) reported by the precoding method, and precoding weights obtained according to the PMI.
  • the antenna does not determine a number of fixed beams through performance of some performance modes (such as AAS weighting), but performs channel estimation on the base station side according to a sounding signal sent by the user terminal to the base station side.
  • the result of the channel estimation is used to calculate the BF weight vector matching the instantaneous channel information of the user terminal, or the PMI is reported by the terminal to the base station by means of precoding.
  • the base station obtains the weight vector according to the PMI, and adds the instantaneous BF or the precoding right.
  • the value also forms a beam that is compatible with the characteristics of the user space, and these beams vary from time to time.
  • the method may further include the following steps (not shown in the figure): respectively calculating and obtaining the average value of the cross-correlation coefficient, and according to the average of the cross-correlation coefficient The value is time-domain filtered for the cross-correlation coefficient; determining, according to the correlation coefficient between the obtained first weight and the second weight corresponding to each beam on the sector to be processed, and the rank corresponding to the user terminal, determining the user terminal corresponding
  • the matching beam includes: determining a matching beam corresponding to the user terminal according to the correlation coefficient of the time domain filtering and the rank corresponding to the user terminal.
  • the technical solution is still described in detail by taking 16 beams in the sector to be processed as an example.
  • After acquiring the cross-correlation coefficients C 1 (t, i), C 2 (t, i), ..., C 16 (t, i) corresponding to the 16 beams respectively calculate the time t of the user terminal on the currently updated sounding bandwidth.
  • the average of the cross-correlation coefficients on the mth beam is Where N is the time t to update the total number of RBGs on the sounding bandwidth for each user.
  • the correlation coefficient on each user beam m also needs to be time domain alpha filtering.
  • the MIMO-based pilot allocation method provided in this embodiment, in the non-beam domain, if the total number of demodulation pilot signals corresponding to the sector to be processed is less than the total number of beams on the sector to be processed, according to a preset time sequence Grouping the beams on the processing sector to obtain at least two first packets, respectively assigning corresponding DMRS ports for each beam on each first packet, and the DMRS ports corresponding to the beams in each first packet are not Similarly, the cross-correlation coefficient of the second weight corresponding to each beam on the to-be-processed sector is obtained by calculation, and the matching beam corresponding to the user terminal is determined according to the cross-correlation coefficient and the rank corresponding to the user terminal, and finally The DMRS port matched by the user terminal is determined by the matching beam, thereby realizing spatial multiplexing of the pilot, which breaks the limitation of the maximum number of paired users in the prior art.
  • the two user terminals are reused.
  • the interference on the pilot is not serious, and the demodulation performance is effectively improved.
  • the average value of the cross-correlation coefficient is calculated and acquired, and the cross-correlation coefficient is performed according to the average value of the cross-correlation coefficient. Domain filtering makes the cross-correlation coefficient more stable, which is beneficial to determine the matching beam corresponding to the user terminal.
  • FIG. 4 is a flowchart of a MIMO-based pilot allocation method according to Embodiment 4 of the present invention.
  • the present embodiment is applied to a non-beam domain scenario, and the reference beam is calculated by calculating a reference signal receiving power (RSRP) of the user terminal.
  • RSRP reference signal receiving power
  • the method of this embodiment includes the following steps.
  • Step 401 If the total number of DMRS ports of the demodulation pilot signal corresponding to the sector to be processed is smaller than the total number of beams on the sector to be processed, the beam on the sector to be processed is processed according to a preset time sequence.
  • the row grouping obtains at least two first packets, and respectively numbers the beams in each of the first packets according to the preset time sequence.
  • Step 402 Assign a corresponding DMRS port to each beam on each first packet.
  • the DMRS ports corresponding to the beams in each first packet are different; and in all the first packets, the beams with the same number are allocated to the same DMRS port.
  • the steps 401 and 402 are the same as the steps 101 and 102 in the first embodiment, and are not described here.
  • step 402 it is determined that different user terminals corresponding to the same matching beam in the same first packet use different frequency domain resources.
  • Step 403 For each user terminal on the sector to be processed, obtain an average channel covariance matrix on the resource block occupied by the reference signal currently received by the user terminal.
  • Step 404 Calculate, according to the obtained average channel covariance matrix and the second weight corresponding to each beam on the to-be-processed sector, the power corresponding to the beam corresponding to the user terminal to receive the reference signal.
  • Step 405 Determine, according to the beam corresponding to the reference signal of the user terminal, the power corresponding to the reference signal and the rank corresponding to the user terminal, and determine a matching beam corresponding to the user terminal.
  • the power corresponding to the reference signal received by the user terminal and the rank corresponding to the user terminal are used to determine the matching beam corresponding to the user terminal, which includes: if the rank corresponding to the user terminal is equal to 1, Determining a matching beam corresponding to the user terminal, where the reference signal corresponding to the matching beam is greater than the power of the reference signal corresponding to the beam other than the matching beam; or, if the rank corresponding to the user terminal is greater than 1, the user terminal Receiving, by the corresponding beam, the received power corresponding to the reference signal, sorting according to the order from small to large, and using the beam corresponding to the first N received powers as the matching beam corresponding to the user terminal; where N is positive An integer greater than or equal to 2.
  • Step 406 For each user terminal, determine a DMRS port corresponding to the matching beam as a DMRS port matched by the user terminal.
  • the same matching beam in the same area corresponds to multiple different user terminals
  • the user terminals are restricted from sharing the same frequency domain resource.
  • the technical solution of this embodiment is described in detail by taking 16 beams in the sector to be processed and the rank of the user terminal being 1 as an example. Presetting a fixed weight for each of the 16 beams, that is, a second weight W m corresponding to each beam, m refers to the mth beam, and W m is the corresponding mth beam. The second weight.
  • the channel covariance matrix R on the Resource Block (RB) of each sounding signal of all user terminals in the sector to be processed can be obtained by the uplink sounding measurement, and the average channel covariance on all sounding bandwidths at the current time t matrix Where N represents the total number of sounding subcarriers on all sounding bandwidths at time t.
  • the second weights corresponding to the 16 beams are W 1 , W 2 , . . . , W 16 , and W i is the weight on the beam i, which is a vector of 16 ⁇ 1, and the time t is on the i-th beam.
  • RSRP is The beam with the largest RSRP is selected as the matching beam of the user terminal, and the DMRS port corresponding to the matching beam is determined as the DMRS port matched by the user terminal.
  • the matching beam includes: a first beam to an Mth beam, wherein the ith beam has a priority greater than the i+1th beam.
  • M is an integer, and is greater than 1
  • i is an integer, greater than or equal to 1, and less than M.
  • the beam with the largest RSRP is used as the first beam of the user terminal, and the beam smaller than the RSRP is used as the second beam of the user terminal, and so on. It should be noted that when the ith beam and the jth beam are allocated the same DMRS port, j is incremented by 1.
  • the step is repeated. Until the selected j-th beam corresponds to the DMRS port and the DMRS port corresponding to the ith beam is different.
  • j is initially i+1 and j is an integer less than M.
  • the method further includes: performing time domain filtering on the RSRP, receiving the power corresponding to the reference signal according to the beam corresponding to the user terminal, and corresponding to the user terminal.
  • the determining the matching beam corresponding to the user terminal includes: determining the matching beam corresponding to the user terminal according to the filtered power and the rank corresponding to the user terminal.
  • the RSRP on the ith beam is obtained.
  • the MIMO-based pilot allocation method provided in this embodiment, in the non-beam domain, if the total number of demodulation pilot signals corresponding to the sector to be processed is less than the total number of beams on the sector to be processed, according to a preset time sequence Grouping the beams on the processing sector to obtain at least two first packets, respectively assigning corresponding DMRS ports for each beam on each first packet, and the DMRS ports corresponding to the beams in each first packet are not Similarly, by calculating and obtaining the reference signal received power, and the rank corresponding to the user terminal, determining the matching beam corresponding to the user terminal, and finally determining the matching DMRS port of the user terminal by using the matching beam, thereby breaking the maximum pairing user in the prior art.
  • FIG. 5 is a schematic structural diagram of a MIMO-based pilot allocation apparatus according to Embodiment 5 of the present invention.
  • the apparatus includes: a grouping module 11, a numbering processing module 12, a port allocating module 13, and a determining module 14.
  • the total number of DMRS ports of the demodulation pilot signal corresponding to the sector to be processed is smaller than the total number of beams on the sector to be processed, and the beams on the sector to be processed are grouped according to a preset time sequence to obtain at least two.
  • the number processing module 12 is configured to respectively number the beams in each of the first packets according to the preset time sequence.
  • the port allocation module 13 is configured to allocate a corresponding DMRS port for each beam on each of the first packets, where the DMRS ports corresponding to the beams in each of the first packets are different; In the packet, beams with the same number are assigned to the same DMRS port.
  • the determining module 14 is configured to respectively determine a matching beam corresponding to each user terminal on the to-be-processed sector, and determine a DMRS port matched by the user terminal according to the DMRS port allocated by the matching beam.
  • the device in this embodiment can perform the technical solution of the method embodiment shown in FIG. 1 , and the implementation principle and the beneficial effects are similar, and details are not described herein again.
  • FIG. 6 is a schematic structural diagram of a MIMO-based pilot allocation apparatus according to Embodiment 6 of the present invention; Figure.
  • the determining module 14 includes a matching beam determining unit 21 and a port determining unit 22.
  • the matching beam determining unit 21 is configured to determine, for each user terminal on the sector to be processed, a matching beam corresponding to the user terminal according to a preset principle and a rank corresponding to the user terminal.
  • the port determining unit 22 is configured to determine, for each user terminal, a DMRS port corresponding to the corresponding matching beam as a DMRS port matched by the user terminal.
  • the device in this embodiment can perform the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and the beneficial effects are similar, and details are not described herein again.
  • FIG. 7 is a schematic structural diagram of a MIMO-based pilot allocation apparatus according to Embodiment 7 of the present invention.
  • the determining module 14 includes a weight processing unit 31, a matching beam determining unit 32, and a port determining unit 33.
  • the weight processing unit 31 is configured to acquire, for each user terminal on the to-be-processed sector, a first weight that matches the current channel information of the user terminal, and separately calculate and obtain the first weight and the to-be-supplied A cross-correlation coefficient of a second weight corresponding to each beam on the sector is processed.
  • the matching beam determining unit 32 is configured to determine, according to the correlation coefficient between the obtained first weight and the second weight corresponding to each beam on the to-be-processed sector, and the rank corresponding to the user terminal, the matching beam corresponding to the user terminal.
  • the port determining unit 33 is configured to determine, for each user terminal, a DMRS port corresponding to the corresponding matching beam as a DMRS port matched by the user terminal.
  • the matching beam determining unit 32 is specifically configured to: if the rank corresponding to the user terminal is equal to 1, determine a matching beam corresponding to the user terminal, where the first weight and the second weight corresponding to the matching beam have a greater correlation coefficient than the first a cross-correlation coefficient of a second weight corresponding to a beam other than the matching beam; or, the matching beam determining unit 32 is specifically configured to: if the rank corresponding to the user terminal is greater than 1, according to the correlation coefficient In a small order, the beams corresponding to the first N correlation numbers are used as matching beams corresponding to the user terminal; wherein N is a positive integer, and N is greater than or equal to 2.
  • the weight processing unit 31 is further configured to: acquire, for each user terminal on the to-be-processed terminal, a first weight that the user terminal matches in the current channel information from the base station side; wherein the first weight is determined by the base station side according to the base station side.
  • the sounding reference signal sent by the user terminal is used for channel estimation to obtain the result of the channel estimation, and the obtained beamforming weight is calculated according to the result of the channel estimation; or the first weight is reported by the base station side receiving user terminal through the precoding method.
  • Precoding matrix Indicates the PMI and the precoding weights obtained from the PMI.
  • the weight processing unit 31 is further configured to separately calculate and acquire an average value of the cross-correlation coefficients, and perform time-domain filtering on the cross-correlation coefficients according to the average value of the cross-correlation coefficients.
  • the matching beam determining unit 32 is further configured to determine a matching beam corresponding to the user terminal according to the correlation coefficient of the time domain filtering and the rank corresponding to the user terminal.
  • the device in this embodiment can perform the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and the beneficial effects are similar, and details are not described herein again.
  • FIG. 8 is a schematic structural diagram of a MIMO-based pilot allocation apparatus according to Embodiment 8 of the present invention.
  • the determining module 14 includes an obtaining unit 41, a matching beam determining unit 42, and a port determining unit 43.
  • the obtaining unit 41 is configured to obtain, for each user terminal on the to-be-processed sector, an average channel covariance matrix on a resource block occupied by the reference signal currently received by the user terminal, according to the obtained average channel.
  • the covariance matrix and the second weight corresponding to each beam on the to-be-processed sector respectively calculate the power corresponding to the beam corresponding to the user terminal to receive the reference signal.
  • the matching beam determining unit 42 is configured to determine a matching beam corresponding to the user terminal according to the power corresponding to the reference signal received by the user terminal and the rank corresponding to the user terminal.
  • the port determining unit 43 is configured to determine, for each user terminal, a DMRS port corresponding to the corresponding matching beam as a DMRS port matched by the user terminal.
  • the matching beam determining unit 42 is specifically configured to: if the rank corresponding to the user terminal is equal to 1, if the rank corresponding to the user terminal is equal to 1, the matching beam of the user terminal is one, and the matching beam corresponding to the user terminal is determined, wherein And the received power corresponding to the reference beam received by the matching beam is greater than the received power corresponding to the other beam corresponding to the user terminal except the matched beam, and the matched beam determining unit 42 is specifically configured to be used by the user.
  • the rank corresponding to the terminal is greater than 1, and the received beam corresponding to the reference signal of the user terminal is sorted in order from small to large, and the beam corresponding to the top N received powers is used as the user.
  • the acquiring unit 41 is further configured to perform time domain filtering on the power corresponding to the beam corresponding to the reference signal received by the user terminal.
  • the matching beam determining unit 42 is further configured to determine a matching beam corresponding to the user terminal according to the filtered power and the rank corresponding to the user terminal.
  • the device in this embodiment can perform the technical solution of the method embodiment shown in FIG. 4, and the implementation principle and the beneficial effects are similar, and details are not described herein again.
  • the present invention also provides a base station comprising a memory and a processor, wherein the memory is for storing instructions; the processor is coupled to the memory, the processor is configured to execute instructions stored in the memory, and the processing
  • a base station comprising a memory and a processor, wherein the memory is for storing instructions; the processor is coupled to the memory, the processor is configured to execute instructions stored in the memory, and the processing
  • the MIMO-based pilot allocation method described in any of the foregoing FIG. 1 to FIG. 4 is configured, and the implementation principles thereof are similar, and are not described herein again.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明提供一种基于MIMO的导频分配方法及装置，该方法包括：若待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组，并分别对每个第一分组中的波束，按照预设时针顺序对波束进行编号；分别为每个第一分组上的每个波束分配对应的DMRS端口；且在不同的第一分组中，编号相同的波束分配同一个DMRS端口；分别确定待处理扇区上每个用户终端对应的匹配波束，根据匹配波束分配的DMRS端口确定用户终端匹配的DMRS端口。本发明实施例打破了现有技术中最大配对对用户层数的限制，有效的提升了解调性能。

Description

基于MIMO的导频分配方法和装置 技术领域
本发明实施例涉及通信技术，尤其涉及一种基于MIMO的导频分配方法和装置。
背景技术
目前，多输入多输出(multiple-input multiple-output，简称MIMO)通常分为单用户多输入多输出(Single-User MIMO，简称SU-MIMO)和多用户多输入多输出(Multi-User MIMO，简称MU-MIMO)两种；其中，SU-MIMO是指基站与一个用户间的点对点天线链路。MU-MIMO是指几个用户使用相同的时域频域资源同时与一个基站通信。由于MU-MIMO可以同时传输多个空分复用的数据流给不同的用户，因此，随着基站发射天线数目的增多，MU-MIMO的增益尤为明显，举例来说，最大的空分复用的数据流数为MIN(NTx，NMs*NRx)，其中，NTx为基站发天线个数，NRx为用户收天线个数，NMs为扇区内的用户数，MIN为取两个数中最小的数值。由此可知，随着基站发射天线数目的增多，为了获得更大的容量增益，复用更多数据流数的需求也就越强烈，从而造成了MU-MIMO的增益尤为明显。
另外，在R9标准中，MU-MIMO可以应用的正交解调导频信号(demodulation reference signal，简称DMRS)端口总数为两个(例如，这两个端口可以表示为port 7和port 8)，也有一些方案中可以增多DMRS的端口总数，如增大到8。以两个端口为例来说明，如果两个单流用户配对的话，那么允许一个用户用port 7发送DMRS，另一个用户用port 8来发送DMRS；如果两个双流用户的话，一个用户用port 7和port 8发送DMRS，另一个用户也用port 7和port 8发送DMRS。
由于现有标准的限制，两个导频端口只能限制最大配对用户的层数(即数据流数)最多不超过4层，(2个正交导频port 7和port 8，相同导频端口上的两个扰码)，当两个双流用户进行配对时，虽然考虑port 7和 port8上还有各有两个扰码，但是扰码区分的导频并不能保证正交，同样的，如果两个单流用户复用一个正交导频端口，扰码区分的导频也不能保证正交，因此，同时用相同导频端口发送导频的用户之间DMRS的干扰很严重，从而导致DMRS信道估计不准，解调性能变差。
发明内容
本发明实施例提供一种基于MIMO的导频分配方法和装置，实现导频的空间复用，打破了现有技术中对最大配对用户层数的限制，有效的提升了解调性能。
本发明第一方面提供一种基于MIMO的导频分配方法，包括：
若待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组，并分别对每个所述第一分组中的波束，按照所述预设时针顺序对波束进行编号；
分别为每个所述第一分组上的每个波束分配对应的DMRS端口；其中，每个所述第一分组中的波束对应的DMRS端口均不相同；且在不同的第一分组中，编号相同的波束分配同一个DMRS端口；
分别确定所述待处理扇区上每个用户终端对应的匹配波束，根据所述匹配波束分配的DMRS端口确定所述用户终端匹配的DMRS端口。
在第一方面的第一种可能实现方式中，所述方法还包括：确定同一个所述第一分组中的同一个所述匹配波束对应的不同用户终端使用不同的频域资源。
结合第一方面，在第一方面的第二种可能实现方式中，所述分别确定所述待处理扇区上每个用户终端对应的匹配波束，以确定所述用户终端匹配的DMRS端口，具体包括：
对于所述待处理扇区上的每个用户终端，根据预先设定的原则，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
结合第一方面，在第一方面的第三种可能实现方式中，所述分别确 定所述待处理扇区上每个用户终端对应的匹配波束，以确定所述用户终端匹配的DMRS端口，具体包括：
对于所述待处理扇区上的每个用户终端，获取所述用户终端的当前信道信息所匹配的第一权值，并分别计算获取所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数；
根据所述获取的所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
结合第一方面的第三种可能实现方式，在第一方面的第四种可能实现方式中，所述根据所述获取的所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束，包括：
若所述用户终端对应的秩等于1，确定所述用户终端对应的一个匹配波束，其中，所述第一权值与所述匹配波束对应的第二权值的互相关系数大于所述第一权值与除所述匹配波束之外的其他波束对应的第二权值的互相关系数；或者，
若所述用户终端对应的秩大于1，按照所述互相关系数的从大到小的顺序，将前N个互相关系数对应的波束作为所述用户终端对应的匹配波束；
其中，N为正整数，且N大于或等于2。
结合第一方面，在第一方面的第五种可能实现方式中，所述分别确定所述待处理扇区上每个用户终端对应的匹配波束，以确定所述用户终端匹配的DMRS端口，具体包括：
对于所述待处理扇区上的每个用户终端，分别获取所述用户终端当前接收到的参考信号所占资源块上的平均信道协方差矩阵，根据所述获取的所述平均信道协方差矩阵和与所述待处理扇区上的每个波束对应的第二权值，分别计算获取所述用户终端对应的波束接收所述参考信号所对应的功率，再根据所述用户终端对应的波束接收所述参考信号所对应 的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
结合第一方面的第五种可能实现方式，在第一方面的第六种可能实现方式中，根据所述用户终端对应的波束接收所述参考信号所对应的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束，具体包括：
若所述用户终端对应的秩等于1，所述用户终端的匹配波束为一个，确定所述用户终端对应的所述匹配波束，其中，所述匹配波束接收所述参考信所对应的接收功率大于除所述匹配波束之外的所述用户终端对应的其它波束接收所述参考信号所对应的接收功率；或者，
若所述用户终端对应的秩大于1，对所述用户终端对应的波束接收所述参考信号所对应的接收功率，按照从小到大的顺序进行排序，并将排序为前N个的接收功率所对应的波束作为所述用户终端对应的匹配波束；
其中，N为正整数，且大于或等于2。
结合第一方面的第三种可能实现方式，在第一方面的第七种可能实现方式中，对于所述待处理扇区上的每个用户终端，获取所述用户终端的当前信道信息所匹配的第一权值，具体包括：
对于所述待处理扇区上的每个用户终端，从基站侧获取所述用户终端的当前信道信息所匹配的第一权值；其中，所述第一权值为所述基站侧根据所述用户终端发送的探测参考信号，进行信道估计获取信道估计的结果，并根据所述信道估计的结果计算获取的波束赋形权值；或者，所述第一权值为所述基站侧接收所述用户终端通过预编码方式上报的预编码矩阵指示PMI，并根据所述PMI获取的预编码权值。
结合第一方面的第三种可能实现方式，在第一方面的第八种可能实现方式中，所述分别计算获取所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数之后，所述方法还包括：
分别计算并获取所述互相关系数的平均值，并根据所述互相关系数 的平均值对所述互相关系数进行时域滤波；
则所述根据所述获取的所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束，具体包括：
根据所述时域滤波后的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束。
结合第一方面的第五种可能实现方式，在第一方面的第九种可能实现方式中，根据所述获取的所述平均信道协方差矩阵和与所述待处理扇区上的每个波束对应的第二权值，分别计算获取所述用户终端对应的波束接收所述参考信号所对应的功率之后，所述方法还包括：
对所述用户终端对应的波束接收所述参考信号所对应的功率进行时域滤波；
则所述根据所述用户终端对应的波束接收所述参考信号所对应的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束，具体包括：
根据所述时域滤波后的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束。
本发明第二方面提供一种基于MIMO的导频分配装置，包括：
分组模块，用于待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组；
编号处理模块，用于分别对每个所述第一分组中的波束，按照所述预设时针顺序对波束进行编号；
端口分配模块，用于分别为每个所述第一分组上的每个波束分配对应的DMRS端口；其中，每个所述第一分组中的波束对应的DMRS端口均不相同；且在不同的第一分组中，编号相同的波束分配同一个DMRS端口；
确定模块，用于分别确定所述待处理扇区上每个用户终端对应的匹配波束，根据所述匹配波束分配的DMRS端口确定所述用户终端匹配的DMRS端口。
在第二方面的第一种可能实现方式中，所述确定模块包括：
匹配波束确定单元，用于对于所述待处理扇区上的每个用户终端，根据预先设定的原则，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
端口确定单元，用于对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
结合第二方面，在第二方面的第二种可能实现方式中，所述确定模块包括：
权值处理单元，用于对于所述待处理扇区上的每个用户终端，获取所述用户终端的当前信道信息所匹配的第一权值，并分别计算获取所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数；
匹配波束确定单元，用于根据所述获取的所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
端口确定单元，用于对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
结合第二方面的第二种可能实现方式，在第二方面的第三种可能实现方式中，所述匹配波束确定单元具体用于若所述用户终端对应的秩等于1，确定所述用户终端对应的一个匹配波束，其中，所述第一权值与所述匹配波束对应的第二权值的互相关系数大于所述第一权值与除所述匹配波束之外的其他波束对应的第二权值的互相关系数；或者，
所述匹配波束确定单元具体用于若所述用户终端对应的秩大于1，按照所述互相关系数的从大到小的顺序，将前N个互相关系数对应的波束作为所述用户终端对应的匹配波束；
其中，N为正整数，且N大于或等于2。
结合第二方面，在第二方面的第四种可能实现方式中，所述确定模块包括：
获取单元，用于对于所述待处理扇区上的每个用户终端，分别获取所述用户终端当前接收到的参考信号所占资源块上的平均信道协方差矩 阵，根据所述获取的所述平均信道协方差矩阵和与所述待处理扇区上的每个波束对应的第二权值，分别计算获取所述用户终端对应的波束接收所述参考信号所对应的功率；
匹配波束确定单元，用于根据所述用户终端对应的波束接收所述参考信号所对应的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
端口确定单元，用于对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
结合第二方面的第四种可能实现方式，在第二方面的第五种可能实现方式中，所述匹配波束确定单元具体用于若所述用户终端对应的秩等于1，所述用户终端的匹配波束为一个，确定所述用户终端对应的所述匹配波束，其中，所述匹配波束接收所述参考信所对应的接收功率大于除所述匹配波束之外的所述用户终端对应的其它波束接收所述参考信号所对应的接收功率；或者，
所述匹配波束确定单元具体用于若所述用户终端对应的秩大于1，对所述用户终端对应的波束接收所述参考信号所对应的接收功率，按照从小到大的顺序进行排序，并将排序为前N个的接收功率所对应的波束作为所述用户终端对应的匹配波束；
其中，N为正整数，且大于或等于2。
结合第二方面的第二种可能实现方式，在第二方面的第六种可能实现方式中，所述权值处理单元还用于：
对于所述待处理扇区上的每个用户终端，从基站侧获取所述用户终端的当前信道信息所匹配的第一权值；其中，所述第一权值为所述基站侧根据所述用户终端发送的探测参考信号，进行信道估计获取信道估计的结果，并根据所述信道估计的结果计算获取的波束赋形权值；或者，所述第一权值为所述基站侧接收所述用户终端通过预编码方式上报的预编码矩阵指示PMI，并根据所述PMI获取的预编码权值。
结合第二方面的第二种可能实现方式，在第二方面的第七种可能实现方式中，所述权值处理单元还用于分别计算并获取所述互相关系数的平均值，并根据所述互相关系数的平均值对所述互相关系数进行时域滤 波；
所述匹配波束确定单元还用于根据所述时域滤波后的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束。
结合第二方面的第四种可能实现方式，在第二方面的第八种可能实现方式中，所述获取单元还用于对所述用户终端对应的波束接收所述参考信号所对应的功率进行时域滤波；
所述匹配波束确定单元还用于根据滤波后的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束。
本发明第三方面提供一种基站，包括：存储器，用于存储指令；
处理器，与所述存储器耦合，所述处理器被配置为执行存储在所述存储器中的指令，且所述处理器被配置为用于执行如上述所述的基于MIMO的导频分配方法。
本实施例提供的基于MIMO的导频分配方法和装置，若待处理扇区对应的DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束分组，获取至少两个第一分组，并分别对每个第一分组中的波束，按照预设时针顺序对波束进行编号，分别为每个第一分组上的每个波束分配对应的DMRS端口，每个第一分组中的波束对应的DMRS端口均不相同，且在所有的第一分组中的具有相同编号的波束对应的DMRS端口相同，分别确定待处理扇区上每个用户终端对应的匹配波束，通过匹配波束确定用户终端匹配的DMRS端口，从而实现导频的空间复用，打破了现有技术中对最大配对用户层数的限制。由于在所有的第一分组中，编号相同的波束分配同一个DMRS端口，分配相同DMRS端口的两个波束覆盖区域对应的两个用户终端空间上距离较远，所以这两个用户终端复用一个DMRS端口时，导频上的干扰不严重，有效的提升了解调性能。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术 人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例一提供的基于MIMO的导频分配方法的流程图；
图2为本发明实施例二提供的基于MIMO的导频分配方法的流程图；
图3为本发明实施例三提供的基于MIMO的导频分配方法的流程图；
图4为本发明实施例四提供的基于MIMO的导频分配方法的流程图；
图5为本发明实施例五提供的基于MIMO的导频分配装置的结构示意图；
图6为本发明实施例六提供的基于MIMO的导频分配装置的结构示意图；
图7为本发明实施例七提供的基于MIMO的导频分配装置的结构示意图；
图8为本发明实施例八提供的基于MIMO的导频分配装置的结构示意图；
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1为本发明实施例一提供的基于MIMO的导频分配方法的流程图，如图1所示，本实施例的方法包括如下步骤。
步骤101、若待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组，并分别对每个该第一分组中的波束，按照该预设时针顺序对波束进行编号。
本实施例中，举例来说，在待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数时，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组，并分别对每个第一 分组中的波束，按照顺时针的顺序对波束进行编号。例如，待处理扇区对应8个DMRS端口，待处理扇区中有16个波束，则可将这16个波束按照预设时针顺序，例如顺时针顺序，分为两组，每组8个波束，形成两个第一分组I和II，将第一分组I中的8个波束按照顺时针的顺序编号为波束1，波束2，……波束8，将第一分组II中的8个波束按照顺时针的顺序编号为波束1，波束2，……，波束8。
可选的，本实施例中，也可以按照逆时针的方向对待处理扇区上的波束进行分组，并对每个分组按照逆时针顺序对其中的波束进行编号。
步骤102、分别为每个该第一分组上的每个波束分配对应的DMRS端口；其中，每个该第一分组中的波束对应的DMRS端口均不相同；且在不同的第一分组中，编号相同的波束分配同一个DMRS端口。
例如，第一分组I中存在波束1和波束2，波束1分配port7，波束2分配port8；第一分组II中存在波束1和波束2，波束1分配port7，波束2分配port8，即两个第一分组中编号相同的两个波束分配相同的DMRS端口。其中，port7和port8是两个不同的DMRS端口，用于发送解调导频信号。
步骤103、分别确定该待处理扇区上每个用户终端对应的匹配波束，根据该匹配波束分配的DMRS端口确定该用户终端匹配的DMRS端口。
本实施例中，待处理扇区中存在多个用户终端，分别确定每个用户终端对应的匹配波束，由于每个波束对应一个DMRS端口，因此，可通过用户终端对应的匹配波束来确定和每个用户终端匹配的DMRS端口。并且，需要说明的是，对于同一个区域中的同一个匹配波束对应多个不同的用户终端时，限制这些用户终端不能共用同一个频域资源，例如，在第一分组I中，波束1覆盖区域下存在三个用户终端，即这三个用户终端的匹配波束都为波束1，因而这三个用户终端分配了同一个DMRS端口，为了防止这三个用户终端使用同一个DMRS端口发送DMRS时产生严重的干扰，则限制这三个用户终端分别使用不同的频率资源。
具体的，以待处理扇区中有16个波束，对应8个不同的DMRS端口(port)为例，详细说明本实施例的技术方案。将这16个波束按照顺时针的顺序分为两组，每组8个波束，形成两个第一分组I和II，其中，第一 分组I的8个波束按照顺时针的顺序依次编号为波束1，波束2，……，波束8，第一分组II的8个波束按照顺时针的顺序依次编号为波束1，波束2，……，波束8。将8个DMRS端口也进行编号，分别为port7，port8，……，port14。分别为第一分组中I和第一分组II的每个波束分配一个对应的DMRS端口，并且，第一分组I和第一分组II中编号相同的两个波束分配同一个DMRS端口，即为第一分组I中的波束1分配port7，波束2分配port8，……，波束8分配port14；为第一分组II中的波束1分配port7，波束2分配port8，……，波束8分配port14。
确定待处理扇区中的每个用户终端对应的匹配波束，根据用户的匹配波束确定每个用户终端匹配的DMRS端口，如第一分组I中用户终端A的匹配波束为波束1，则用户终端A匹配的DMRS端口为port7，用户终端B的匹配波束为波束2，则用户终端B匹配的DMRS端口为port8，以此类推；第一分组II中的用户终端I的匹配波束为波束1，则用户终端I匹配的DMRS端口为port7，用户终端J的匹配波束为波束2，则用户终端J匹配的DMRS端口为port8，以此类推。即第一分组I中属于波束1的用户终端A和第一分组II中属于波束1的用户终端I空分复用port7，……，第一分组I中属于波束8的用户终端H和第一分组II中属于波束8的用户终端P空分复用port14。
需要说明的是，本实施例中待处理扇区中仅以16个波束，对应8个DMRS端口，两个第一分组为例来说明，但并不以此为限。
本实施例提供的基于MIMO的导频分配方法，若待处理扇区对应的DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束分组，获取至少两个第一分组，并分别对每个第一分组中的波束，按照预设时针顺序对波束进行编号，分别为每个第一分组上的每个波束分配对应的DMRS端口，每个第一分组中的波束对应的DMRS端口均不相同，且在所有的第一分组中的具有相同编号的波束对应的DMRS端口相同，分别确定待处理扇区上每个用户终端对应的匹配波束，通过匹配波束确定用户终端匹配的DMRS端口，从而实现导频的空间复用，打破了现有技术中对最大配对用户层数的限制。由于在所有的第一分组中，编号相同的波束分配同一个DMRS端口，分配相同 DMRS端口的两个波束覆盖区域对应的两个用户终端空间上距离较远，所以这两个用户终端复用一个DMRS端口时，导频上的干扰不严重，有效的提升了解调性能。
图2为本发明实施例二提供的基于MIMO的导频分配方法的流程图。本实施例应用于待处理扇区中存在若干波束的场景中。如图2所示，本实施例的方法包括如下步骤。
步骤201、若待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组，并分别对每个该第一分组中的波束，按照该预设时针顺序对波束进行编号。
步骤202、分别为每个第一分组上的每个波束分配对应的DMRS端口。
其中，每个第一分组中的波束对应的DMRS端口均不相同；且在所有的第一分组中，编号相同的波束分配同一个DMRS端口。
本实施例中，步骤201和步骤202分别与上述实施例一中的步骤101和步骤102相同，此处不再赘述。
另外，优选地，在步骤202中，确定同一个该第一分组中的同一个该匹配波束对应的不同用户终端使用不同的频域资源。
步骤203、对于待处理扇区上的每个用户终端，根据预先设定的原则，以及用户终端对应的秩，确定用户终端对应的匹配波束。
本实施例中，以预先设定的原则为上行接收功率最大原则为例，具体说明该技术方案，基站按照下述步骤确定每个波束的平均上行接收功率：
1)基站通过m个波束接收UE的上行探测信号，在每个天线端口基于上行探测信号进行信道估计，确定每个天线端口在子载波上对应的信道系数。例如，对于m个波束中的第i个波束对应的第j个天线端口，在子载波k上估计得到的信道系数表示为hi,j,k。
2)基站计算每个波束的信道系数在所有天线端口、所有子载波上的平均上行接收功率。
例如，第i个波束的平均上行接收功率
Figure PCTCN2015072233-appb-000001
其中，Nport表示m个波束对应的天线端口的总数目；Nsubcarr表示子载波的总数目。
3)基站在时域上将每个波束的平均上行接收功率进行滤波，相应地，时域计数器加1。
4)基站判断时域计数器是否达到时域滤波的窗长。
如果时域计数器未达到时域滤波的窗长，则基站返回执行上述步骤1)。
如果时域计数器达到时域滤波的窗长，则将该时间段内m个波束各自的平均上行接收功率作为m个波束各自的上行接收功率。
5)基站按照m个波束的上行接收功率从大到小的顺序，对m个波束进行排序，若该用户终端的秩等于1，则将上行接收功率最大的波束作为该用户终端的匹配波束；若用户终端的秩大于1时，例如用户终端的秩为2，即N＝2，则匹配波束包括：第1波束至第M波束，其中，第i波束的优先级大于第i+1波束的优先级，M为整数，且大于1，i为整数，大于或等于1，且小于M。具体的，将互相关系数最大的波束作为用户终端的第1波束，将仅小于最大的互相关系数的波束作为用户终端的第2波束，以此类推。
需要说明的是，本实施例中接收UE的上行探测信号的是波束或者天线端口，该天线端口和DMRS端口是不相同的，如果天线是双极化天线，则每个波束对应的天线端口数为2；如果天线是同极化天线，则每个波束对应的天线端口数为1.
步骤204、对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为用户终端匹配的DMRS端口。
需要说明的是，本实施例中，当同一个区域中的同一个匹配波束对应多个不同的用户终端时，限制这些用户终端不能共用同一个频域资源。
本实施例中，当用户终端对应的秩为1时，确定该用户终端对应一个匹配波束，即将对应的匹配波束对应的DMRS端口确定为用户终端匹配的DMRS端口；当用户终端的秩大于1，即用户终端对应的匹配波束包括多个波束时，根据步骤203中的方法，选择出多个波束作为用户终端的匹 配波束，并将这多个波束分别对应的DMRS端口都确定为该用户终端匹配的端口。需要注意的是，用户终端对应的匹配波束包括多个波束时，当第i波束和第j波束分配了同一个DMRS端口时，则将j加1，若该第i波束和第j波束均分配了同一个DMRS端口，则重复执行该步骤，直至选出的第j波束对应DMRS端口和第i波束对应的DMRS端口不相同为止。其中，j初始时为i+1，且j为整数，小于M。
本实施例提供的基于MIMO的导频分配方法，若待处理扇区对应的DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束分组，获取至少两个第一分组根据待处理扇区对应的DMRS端口的总数，将待处理扇区上的若干波束分为至少两个第一分组，并对每个第一分组中的波束按照预设时针顺序进行编号，分别为每个第一分组上的每个波束分配对应的DMRS端口，通过基站从m个波束中选择上行接收功率最大波束作为用户终端的匹配波束，通过匹配波束确定用户终端匹配的DMRS端口，能够充分利用用户终端的空间特性，这样使得对多个波束加权形成的优化波束更符合用户终端的空间特性。
图3为本发明实施例三提供的基于MIMO的导频分配方法的流程图。本实施例应用于非波束域的场景中，通过计算权值相关性来判断用户终端的匹配波束。如图3所示，本实施例的方法包括如下步骤。
步骤301、若待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组，并分别对每个该第一分组中的波束，按照该预设时针顺序对波束进行编号。
步骤302、分别为每个第一分组上的每个波束分配对应的DMRS端口。
其中，每个第一分组中的波束对应的DMRS端口均不相同；且在所有的第一分组中，编号相同的波束分配同一个DMRS端口。
本实施例中，步骤301和步骤302分别与上述实施例一中的步骤101和步骤102相同，此处不再赘述。
另外，优选地，在步骤302中，确定同一个该第一分组中的同一个该匹配波束对应的不同用户终端使用不同的频域资源。
步骤303、对于待处理扇区上的每个用户终端，获取用户终端的当前信道信息所匹配的第一权值。
步骤304、分别计算获取第一权值与待处理扇区上的每个波束对应的第二权值的互相关系数。
步骤305、根据获取的第一权值与待处理扇区上的每个波束对应的第二权值的互相关系数，以及用户终端对应的秩，确定用户终端对应的匹配波束。
优选地，本实施例中，根据获取的第一权值与待处理扇区上的每个波束对应的第二权值的互相关系数，以及用户终端对应的秩，确定用户终端对应的匹配波束，具体包括：若用户终端对应的秩等于1，确定用户终端对应的一个匹配波束，其中，第一权值与匹配波束对应的第二权值的互相关系数大于第一权值与除匹配波束之外的其他波束对应的第二权值的互相关系数；或者，所述用户终端对应的秩大于1，按照互相关系数的从大到小的顺序，将前N个相互系数对应的波束作为用户终端对应的匹配波束；其中，N为正整数，且N大于或等于2。
步骤306、对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为用户终端匹配的DMRS端口。
需要说明的是，本实施例中，当同一个区域中的同一个匹配波束对应多个不同的用户终端时，限制这些用户终端不能共用同一个频域资源。
具体的，以待处理扇区中有16个波束，该用户终端的秩为1为例，来详细说明本实施例的技术方案。预先的为该16个波束的每一个波束设置一个固定的权值，即每个波束对应的第二权值Wm,m指的是第m个波束，Wm即为第m个波束对应的第二权值。用户终端在时刻t第i个资源块组(Resource Block Group，简称RBG)上的波束赋型(Beam Forming，简称BF)权值为WBF，即第一权值，WBF是1x16的向量，根据公式
Figure PCTCN2015072233-appb-000002
分别计算WBF与16个预设权值之间的互相关系数，获得16个波束对应的互相关系数C1(t,i),C2(t,i),…,C16(t,i)，选择互相关系数最大的波束为用户终端的匹配波束，匹配波束对应的DMRS端口即为该用户终端匹配的DMRS端口。
当用户终端的秩大于1时，例如用户终端的秩为2，即N＝2，则匹配波束包括：第1波束至第M波束，其中，第i波束的优先级大于第i+1波束的优先级，M为整数，且大于1，i为整数，大于或等于1，且小于M。具体的，将互相关系数最大的波束作为用户终端的第1波束，将仅小于最大的互相关系数的波束作为用户终端的第2波束，以此类推。需要注意的是，当第i波束和第j波束分配了同一个DMRS端口时，则将j加1，若该第i波束和第j波束均分配了同一个DMRS端口，则重复执行该步骤，直至选出的第j波束对应DMRS端口和第i波束对应的DMRS端口不相同为止。其中，j初始时为i+1，且j为整数，小于M。
优选地，在本实施例三中，步骤303具体包括：对于所述待处理扇区上的每个用户终端，从基站侧获取该用户终端在当前信道信息匹配的第一权值；其中，第一权值为基站侧根据用户终端发送的探测参考信号，进行信道估计获取信道估计的结果，并根据信道估计的结果计算获取的BF权值；或者，第一权值为基站侧接收用户终端通过预编码方式上报的预编码矩阵指示(Precoding Matrix Indicator，简称PMI)，并根据PMI获取的预编码权值。
本实施例中，天线并没有通过一些性能方式(如AAS加权的方式)性能确定若干固定的波束，而是根据用户终端发送给基站侧的探测(sounding)信号，在基站侧做信道估计并根据信道估计的结果计算与用户终端瞬时信道信息匹配的BF加权向量，或者是通过预编码(precoding)的方式由终端向基站上报PMI，基站根据PMI获取加权向量，通过加这个瞬时的BF或者precoding权值，也形成了一个与用户空间特性相适应的波束，而这些波束是时时变化的。
进一步地，在本实施例三的基础上，在步骤304之后，该方法还可以包括如下步骤(图中未示出)：分别计算并获取互相关系数的平均值，并根据互相关系数的平均值对互相关系数进行时域滤波；则根据获取的第一权值与待处理扇区上的每个波束对应的第二权值的互相关系数，以及用户终端对应的秩，确定用户终端对应的匹配波束，具体包括：根据时域滤波后的互相关系数，以及用户终端对应的秩，确定用户终端对应的匹配波束。
具体的，本实施例中，仍然以待处理扇区中有16个波束为例来详细说明该技术方案。获取16个波束对应的互相关系数 C1(t,i),C2(t,i),…,C16(t,i)之后，分别计算时刻t用户终端在当前更新的sounding带宽上所有RBG的互相关系数的平均值
Figure PCTCN2015072233-appb-000003
…
Figure PCTCN2015072233-appb-000004
第m个波束上的互相关系数的平均值为
Figure PCTCN2015072233-appb-000005
其中N为时刻t每个用户更新sounding带宽上的RBG总数。每个用户波束m上的互相关系数还需要做时域α滤波，
Figure PCTCN2015072233-appb-000006
滤波窗长为200ms，α＝0.1，再根据时域α滤波后的互相关系数，以及用户终端的对应的秩，确定用户终端的匹配波束。
本实施例提供的基于MIMO的导频分配方法，在非波束域中，若待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组，分别为每个第一分组上的每个波束分配对应的DMRS端口，每个第一分组中的波束对应的DMRS端口均不相同，通过计算获取第一权值与待处理扇区上的每个波束对应的第二权值的互相关系数，根据互相关系数以及用户终端对应的秩来确定用户终端对应的匹配波束，最终通过匹配波束确定用户终端匹配的DMRS端口，从而实现导频的空间复用，打破了现有技术中对最大配对用户层数的限制。由于在所有的第一分组中，编号相同的波束分配同一个DMRS端口，即分配相同DMRS端口的两个波束覆盖区域对应的两个用户终端空间上距离较远，所以这两个用户终端复用一个DMRS端口时，导频上的干扰不严重，有效的提升了解调性能，并且，本实施例中计算并获取互相关系数的平均值，并根据互相关系数的平均值对互相关系数进行时域滤波，使得互相关系数更加平稳，有利于确定用户终端对应的匹配波束。
图4为本发明实施例四提供的基于MIMO的导频分配方法的流程图。本实施例应用于非波束域的场景中，通过计算用户终端的参考信号接收功率(Reference Signal Receiving Power，简称RSRP)来判断匹配波束。如图4所示，本实施例的方法包括如下步骤。
步骤401、若待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进 行分组，获取至少两个第一分组，并分别对每个该第一分组中的波束，按照该预设时针顺序对波束进行编号。
步骤402、分别为每个第一分组上的每个波束分配对应的DMRS端口。
其中，每个第一分组中的波束对应的DMRS端口均不相同；且在所有的第一分组中，编号相同的波束分配同一个DMRS端口。
本实施例中，步骤401和步骤402分别与上述实施例一中的步骤101和步骤102相同，此处不再赘述。
另外，优选地，在步骤402中，确定同一个该第一分组中的同一个该匹配波束对应的不同用户终端使用不同的频域资源。
步骤403、对于待处理扇区上的每个用户终端，分别获取用户终端当前接收到的参考信号所占资源块上的平均信道协方差矩阵。
步骤404、根据该获取的该平均信道协方差矩阵和与该待处理扇区上的每个波束对应的第二权值，分别计算获取该用户终端对应的波束接收该参考信号所对应的功率。
步骤405、根据该用户终端对应的波束接收该参考信号所对应的功率，以及该用户终端对应的秩，确定该用户终端对应的匹配波束。
优选地，本实施例中，根据用户终端对应的波束接收该参考信号所对应的功率，以及用户终端对应的秩，确定用户终端对应的匹配波束，具体包括：若用户终端对应的秩等于1，确定用户终端对应的一个匹配波束，其中，匹配波束对应的参考信号接收功率大于除匹配波束之外的其它波束对应的参考信号的功率；或者，若用户终端对应的秩大于1，对该用户终端对应的波束接收该参考信号所对应的接收功率，按照从小到大的顺序进行排序，并将排序为前N个的接收功率所对应的波束作为该用户终端对应的匹配波束；其中，N为正整数，且大于或等于2。
步骤406、对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为用户终端匹配的DMRS端口。
需要说明的是，本实施例中，当同一个区域中的同一个匹配波束对应多个不同的用户终端时，限制这些用户终端不能共用同一个频域资源。
具体的，以待处理扇区中有16个波束，该用户终端的秩为1为例， 来详细说明本实施例的技术方案。预先的为该16个波束的每一个波束设置一个固定的权值，即每个波束对应的第二权值Wm,m指的是第m个波束，Wm即为第m个波束对应的第二权值。通过上行sounding测量可以获得待处理扇区中所有用户终端每个sounding信号所占资源块(Resource Block，简称RB)上的信道协方差矩阵R，则当前时刻t所有sounding带宽上的平均信道协方差矩阵
Figure PCTCN2015072233-appb-000007
其中N表示时刻t所有sounding带宽上的sounding子载波总数。假设16个波束对应的第二权值分别为W1,W2,...,W16，Wi为波束i上的权值，为16x1的向量，则时刻t，第i个波束上的RSRP为
Figure PCTCN2015072233-appb-000008
选择RSRP最大的波束作为用户终端的匹配波束，并将对应的匹配波束对应的DMRS端口确定为用户终端匹配的DMRS端口。
当用户终端对应的秩大于1时，例如用户终端的秩为2，即N＝2，则匹配波束包括：第1波束至第M波束，其中，第i波束的优先级大于第i+1波束的优先级，M为整数，且大于1，i为整数，大于或等于1，且小于M。具体的，将RSRP最大的波束作为用户终端的第1波束，将仅小于RSRP的波束作为用户终端的第2波束，以此类推。需要注意的是，当第i波束和第j波束分配了同一个DMRS端口时，则将j加1，若该第i波束和第j波束均分配了同一个DMRS端口，则重复执行该步骤，直至选出的第j波束对应DMRS端口和第i波束对应的DMRS端口不相同为止。其中，j初始时为i+1，且j为整数，小于M。
优选地，本实施例三的基础上，步骤404之后，该方法还包括：对RSRP进行时域滤波，则根据该用户终端对应的波束接收该参考信号所对应的功率，以及该用户终端对应的秩，确定该用户终端对应的匹配波束，具体包括：根据该滤波后的功率，以及该用户终端对应的秩，确定该用户终端对应的匹配波束。
本实施例中，在获取到第i个波束上的RSRP为
Figure PCTCN2015072233-appb-000009
之后，每个用户波束i上的RSRP还需要做时域α滤波，RSRPi'(t)＝(1-α)RSRPi(t-1)+αRSRPi(t)， 滤波窗长为200ms，α＝0.1，再根据滤波后的功率以及用户终端对应的秩，确定用户终端对应的匹配波束。
本实施例提供的基于MIMO的导频分配方法，在非波束域中，若待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组，分别为每个第一分组上的每个波束分配对应的DMRS端口，每个第一分组中的波束对应的DMRS端口均不相同，通过计算并获取到参考信号接收功率，以及用户终端对应的秩，确定用户终端对应的匹配波束，最终通过匹配波束确定用户终端匹配的DMRS端口，从而打破了现有技术中最大配对对用户层数的限制，实现导频的空间复用，由于在所有的第一分组中，编号相同的波束分配同一个DMRS端口，即分配相同DMRS端口的两个波束覆盖区域对应的两个用户终端空间上距离较远，所以这两个用户终端复用一个DMRS端口时，导频上的干扰不严重，有效的提升了解调性能，并且，本实施例中对RSRP进行时域滤波，使得RSRP的特性更加平稳，有利于确定用户终端对应的匹配波束。
图5为本发明实施例五提供的基于MIMO的导频分配装置的结构示意图，如图5所示，该装置包括：分组模块11、编号处理模块12、端口分配模块13和确定模块14。其中，分组模块11用于待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组。编号处理模块12用于分别对每个该第一分组中的波束，按照该预设时针顺序对波束进行编号。端口分配模块13用于分别为每个该第一分组上的每个波束分配对应的DMRS端口；其中，每个该第一分组中的波束对应的DMRS端口均不相同；且在不同的第一分组中，编号相同的波束分配同一个DMRS端口。确定模块14用于分别确定该待处理扇区上每个用户终端对应的匹配波束，根据该匹配波束分配的DMRS端口确定该用户终端匹配的DMRS端口。
本实施例的装置可以执行图1所示方法实施例的技术方案，其实现原理和有益效果相类似，此处不再赘述。
图6为本发明实施例六提供的基于MIMO的导频分配装置的结构示意 图。在上述图5所述实施例的基础上，如图6所示，确定模块14包括：匹配波束确定单元21和端口确定单元22。其中，匹配波束确定单元21用于对于待处理扇区上的每个用户终端，根据预先设定的原则，以及用户终端对应的秩，确定用户终端对应的匹配波束。端口确定单元22用于对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为用户终端匹配的DMRS端口。
本实施例的装置可以执行图2所示方法实施例的技术方案，其实现原理和有益效果相类似，此处不再赘述。
图7本发明实施例七提供的基于MIMO的导频分配装置的结构示意图。在上述图5所述实施例的基础上，如图7所示，确定模块14包括：权值处理单元31、匹配波束确定单元32和端口确定单元33。其中，权值处理单元31用于对于该待处理扇区上的每个用户终端，获取该用户终端的当前信道信息所匹配的第一权值，并分别计算获取该第一权值与该待处理扇区上的每个波束对应的第二权值的互相关系数。匹配波束确定单元32用于根据获取的第一权值与待处理扇区上的每个波束对应的第二权值的互相关系数，以及用户终端对应的秩，确定用户终端对应的匹配波束。端口确定单元33用于对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为用户终端匹配的DMRS端口。
优选地，匹配波束确定单元32具体用于若用户终端对应的秩等于1，确定用户终端对应的一个匹配波束，其中，第一权值与匹配波束对应的第二权值的互相关系数大于第一权值与除匹配波束之外的其他波束对应的第二权值的互相关系数；或者，匹配波束确定单元32具体用于若用户终端对应的秩大于1，按照互相关系数的从大到小的顺序，将前N个互相关系数对应的波束作为用户终端对应的匹配波束；其中，N为正整数，且N大于或等于2。
优选地，权值处理单元31还用于对于待处理扇区上的每个用户终端，从基站侧获取用户终端在当前信道信息匹配的第一权值；其中，第一权值为基站侧根据用户终端发送的探测参考信号，进行信道估计获取信道估计的结果，并根据信道估计的结果计算获取的波束赋形权值；或者，第一权值为基站侧接收用户终端通过预编码方式上报的预编码矩阵 指示PMI，并根据PMI获取的预编码权值。
优选地，权值处理单元31还用于分别计算并获取互相关系数的平均值，并根据互相关系数的平均值对互相关系数进行时域滤波。匹配波束确定单元32还用于根据时域滤波后的互相关系数，以及用户终端对应的秩，确定用户终端对应的匹配波束。
本实施例的装置可以执行图3所示方法实施例的技术方案，其实现原理和有益效果相类似，此处不再赘述。
图8本发明实施例八提供的基于MIMO的导频分配装置的结构示意图。在上述图5所述实施例的基础上，如图8所示，确定模块14包括：获取单元41、匹配波束确定单元42和端口确定单元43。其中，获取单元41用于对于该待处理扇区上的每个用户终端，分别获取该用户终端当前接收到的参考信号所占资源块上的平均信道协方差矩阵，根据该获取的该平均信道协方差矩阵和与该待处理扇区上的每个波束对应的第二权值，分别计算获取该用户终端对应的波束接收该参考信号所对应的功率。匹配波束确定单元42用于根据该用户终端对应的波束接收该参考信号所对应的功率，以及该用户终端对应的秩，确定该用户终端对应的匹配波束。端口确定单元43用于对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为用户终端匹配的DMRS端口。
优选地，匹配波束确定单元42具体用于若用户终端对应的秩等于1，若该用户终端对应的秩等于1，该用户终端的匹配波束为一个，确定该用户终端对应的该匹配波束，其中，该匹配波束接收该参考信所对应的接收功率大于除该匹配波束之外的该用户终端对应的其它波束接收该参考信号所对应的接收功率；或者，匹配波束确定单元42具体用于若用户终端对应的秩大于1，对该用户终端对应的波束接收该参考信号所对应的接收功率，按照从小到大的顺序进行排序，并将排序为前N个的接收功率所对应的波束作为该用户终端对应的匹配波束；其中，N为正整数，且大于或等于2。
优选地，获取单元41还用于对该用户终端对应的波束接收该参考信号所对应的功率进行时域滤波。匹配波束确定单元42还用于根据滤波后的功率，以及用户终端对应的秩，确定用户终端对应的匹配波束。
本实施例的装置可以执行图4所示方法实施例的技术方案，其实现原理和有益效果相类似，此处不再赘述。
本发明还提供了一种基站，包括存储器和处理器，其中，存储器用于存储指令；处理器，与该存储器耦合，该处理器被配置为执行存储在所述存储器中的指令，且该处理器被配置为用于执行上述图1至图4任一所述的基于MIMO的导频分配方法，其实现原理相类似，此处不再赘述。
本领域普通技术人员可以理解：实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (20)

  1. 一种基于MIMO的导频分配方法，其特征在于，包括：
    若待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组，并分别对每个所述第一分组中的波束，按照所述预设时针顺序对波束进行编号；
    分别为每个所述第一分组上的每个波束分配对应的DMRS端口；其中，每个所述第一分组中的波束对应的DMRS端口均不相同；且在不同的第一分组中，编号相同的波束分配同一个DMRS端口；
    分别确定所述待处理扇区上每个用户终端对应的匹配波束，根据所述匹配波束分配的DMRS端口确定所述用户终端匹配的DMRS端口。
  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：确定同一个所述第一分组中的同一个所述匹配波束对应的不同用户终端使用不同的频域资源。
  3. 根据权利要求1所述的方法，其特征在于，所述分别确定所述待处理扇区上每个用户终端对应的匹配波束，以确定所述用户终端匹配的DMRS端口，具体包括：
    对于所述待处理扇区上的每个用户终端，根据预先设定的原则，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
    对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
  4. 根据权利要求1所述的方法，其特征在于，所述分别确定所述待处理扇区上每个用户终端对应的匹配波束，以确定所述用户终端匹配的DMRS端口，具体包括：
    对于所述待处理扇区上的每个用户终端，获取所述用户终端的当前信道信息所匹配的第一权值，并分别计算获取所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数；
    根据所述获取的所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
    对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
  5. 根据权利要求4所述的方法，其特征在于，所述根据所述获取的所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束，包括：
    若所述用户终端对应的秩等于1，确定所述用户终端对应的一个匹配波束，其中，所述第一权值与所述匹配波束对应的第二权值的互相关系数大于所述第一权值与除所述匹配波束之外的其他波束对应的第二权值的互相关系数；或者，
    若所述用户终端对应的秩大于1，按照所述互相关系数的从大到小的顺序，将前N个互相关系数对应的波束作为所述用户终端对应的匹配波束；
    其中，N为正整数，且N大于或等于2。
  6. 根据权利要求1所述的方法，其特征在于，所述分别确定所述待处理扇区上每个用户终端对应的匹配波束，以确定所述用户终端匹配的DMRS端口，具体包括：
    对于所述待处理扇区上的每个用户终端，分别获取所述用户终端当前接收到的参考信号所占资源块上的平均信道协方差矩阵，根据所述获取的所述平均信道协方差矩阵和与所述待处理扇区上的每个波束对应的第二权值，分别计算获取所述用户终端对应的波束接收所述参考信号所对应的功率，再根据所述用户终端对应的波束接收所述参考信号所对应的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
    对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
  7. 根据权利要求6所述的方法，其特征在于，根据所述用户终端对应的波束接收所述参考信号所对应的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束，具体包括：
    若所述用户终端对应的秩等于1，所述用户终端的匹配波束为一个， 确定所述用户终端对应的所述匹配波束，其中，所述匹配波束接收所述参考信所对应的接收功率大于除所述匹配波束之外的所述用户终端对应的其它波束接收所述参考信号所对应的接收功率；或者，
    若所述用户终端对应的秩大于1，对所述用户终端对应的波束接收所述参考信号所对应的接收功率，按照从小到大的顺序进行排序，并将排序为前N个的接收功率所对应的波束作为所述用户终端对应的匹配波束；
    其中，N为正整数，且大于或等于2。
  8. 根据权利要求4所述的方法，其特征在于，对于所述待处理扇区上的每个用户终端，获取所述用户终端的当前信道信息所匹配的第一权值，具体包括：
    对于所述待处理扇区上的每个用户终端，从基站侧获取所述用户终端的当前信道信息所匹配的第一权值；其中，所述第一权值为所述基站侧根据所述用户终端发送的探测参考信号，进行信道估计获取信道估计的结果，并根据所述信道估计的结果计算获取的波束赋形权值；或者，所述第一权值为所述基站侧接收所述用户终端通过预编码方式上报的预编码矩阵指示PMI，并根据所述PMI获取的预编码权值。
  9. 根据权利要求4所述的方法，其特征在于，所述分别计算获取所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数之后，所述方法还包括：
    分别计算并获取所述互相关系数的平均值，并根据所述互相关系数的平均值对所述互相关系数进行时域滤波；
    则所述根据所述获取的所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束，具体包括：
    根据所述时域滤波后的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束。
  10. 根据权利要求6所述的方法，其特征在于，根据所述获取的所述平均信道协方差矩阵和与所述待处理扇区上的每个波束对应的第二权值，分别计算获取所述用户终端对应的波束接收所述参考信号所对应的 功率之后，所述方法还包括：
    对所述用户终端对应的波束接收所述参考信号所对应的功率进行时域滤波；
    则所述根据所述用户终端对应的波束接收所述参考信号所对应的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束，具体包括：
    根据所述时域滤波后的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束。
  11. 一种基于MIMO的导频分配装置，其特征在于，包括：
    分组模块，用于待处理扇区对应的解调导频信号DMRS端口的总数小于待处理扇区上波束的总数，按照预设时针顺序对待处理扇区上的波束进行分组，获取至少两个第一分组；
    编号处理模块，用于分别对每个所述第一分组中的波束，按照所述预设时针顺序对波束进行编号；
    端口分配模块，用于分别为每个所述第一分组上的每个波束分配对应的DMRS端口；其中，每个所述第一分组中的波束对应的DMRS端口均不相同；且在不同的第一分组中，编号相同的波束分配同一个DMRS端口；
    确定模块，用于分别确定所述待处理扇区上每个用户终端对应的匹配波束，根据所述匹配波束分配的DMRS端口确定所述用户终端匹配的DMRS端口。
  12. 根据权利要求11所述的装置，其特征在于，所述确定模块包括：
    匹配波束确定单元，用于对于所述待处理扇区上的每个用户终端，根据预先设定的原则，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
    端口确定单元，用于对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
  13. 根据权利要求11所述的装置，其特征在于，所述确定模块包括：
    权值处理单元，用于对于所述待处理扇区上的每个用户终端，获取所述用户终端的当前信道信息所匹配的第一权值，并分别计算获取所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数；
    匹配波束确定单元，用于根据所述获取的所述第一权值与所述待处理扇区上的每个波束对应的第二权值的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
    端口确定单元，用于对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
  14. 根据权利要求13所述的装置，其特征在于，所述匹配波束确定单元具体用于若所述用户终端对应的秩等于1，确定所述用户终端对应的一个匹配波束，其中，所述第一权值与所述匹配波束对应的第二权值的互相关系数大于所述第一权值与除所述匹配波束之外的其他波束对应的第二权值的互相关系数；或者，
    所述匹配波束确定单元具体用于若所述用户终端对应的秩大于1，按照所述互相关系数的从大到小的顺序，将前N个互相关系数对应的波束作为所述用户终端对应的匹配波束；
    其中，N为正整数，且N大于或等于2。
  15. 根据权利要求11所述的装置，其特征在于，所述确定模块包括：
    获取单元，用于对于所述待处理扇区上的每个用户终端，分别获取所述用户终端当前接收到的参考信号所占资源块上的平均信道协方差矩阵，根据所述获取的所述平均信道协方差矩阵和与所述待处理扇区上的每个波束对应的第二权值，分别计算获取所述用户终端对应的波束接收所述参考信号所对应的功率；
    匹配波束确定单元，用于根据所述用户终端对应的波束接收所述参考信号所对应的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束；
    端口确定单元，用于对于每个用户终端，将对应的匹配波束对应的DMRS端口确定为所述用户终端匹配的DMRS端口。
  16. 根据权利要求15所述的装置，其特征在于，所述匹配波束确定单元具体用于若所述用户终端对应的秩等于1，所述用户终端的匹配波束为一个，确定所述用户终端对应的所述匹配波束，其中，所述匹配波束接收所述参考信所对应的接收功率大于除所述匹配波束之外的所述用户终端对应的其它波束接收所述参考信号所对应的接收功率；或者，
    所述匹配波束确定单元具体用于若所述用户终端对应的秩大于1，对所述用户终端对应的波束接收所述参考信号所对应的接收功率，按照从小到大的顺序进行排序，并将排序为前N个的接收功率所对应的波束作为所述用户终端对应的匹配波束；
    其中，N为正整数，且大于或等于2。
  17. 根据权利要求13所述的装置，其特征在于，所述权值处理单元还用于：
    对于所述待处理扇区上的每个用户终端，从基站侧获取所述用户终端的当前信道信息所匹配的第一权值；其中，所述第一权值为所述基站侧根据所述用户终端发送的探测参考信号，进行信道估计获取信道估计的结果，并根据所述信道估计的结果计算获取的波束赋形权值；或者，所述第一权值为所述基站侧接收所述用户终端通过预编码方式上报的预编码矩阵指示PMI，并根据所述PMI获取的预编码权值。
  18. 根据权利要求13所述的装置，其特征在于，所述权值处理单元还用于分别计算并获取所述互相关系数的平均值，并根据所述互相关系数的平均值对所述互相关系数进行时域滤波；
    所述匹配波束确定单元还用于根据所述时域滤波后的互相关系数，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束。
  19. 根据权利要求15所述的装置，其特征在于，所述获取单元还用于对所述用户终端对应的波束接收所述参考信号所对应的功率进行时域滤波；
    所述匹配波束确定单元还用于根据滤波后的功率，以及所述用户终端对应的秩，确定所述用户终端对应的匹配波束。
  20. 一种基站，其特征在于，包括：存储器，用于存储指令；
    处理器，与所述存储器耦合，所述处理器被配置为执行存储在所述 存储器中的指令，且所述处理器被配置为用于执行如权利要求1至10任一所述的基于MIMO的导频分配方法。
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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107276733B (zh) * 2016-04-08 2019-11-29 北京华为数字技术有限公司 一种确定dmrs的端口映射的方法、基站和终端
CN107306146B (zh) * 2016-04-19 2021-07-30 中兴通讯股份有限公司 端口与波束的配置方法及装置
CN107872253B (zh) * 2016-09-27 2021-06-08 华为技术有限公司 波束跟踪方法、设备及系统
CN107888257B (zh) * 2016-09-30 2022-09-16 中兴通讯股份有限公司 一种波束选择方法、装置和基站
CN108288991B (zh) 2017-01-09 2023-05-09 中兴通讯股份有限公司 波束信息、配置信息的反馈方法及装置
CN109644349B (zh) * 2017-05-10 2022-08-26 华为技术有限公司 波束管理的方法、网络设备及终端

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101764642A (zh) * 2009-12-30 2010-06-30 中兴通讯股份有限公司 一种下行控制信息的传输方法及传输系统
US20110150120A1 (en) * 2009-12-18 2011-06-23 Nokia Siemens Networks Oy Reference signal resource randomization with SU-MIMO
CN102843325A (zh) * 2011-06-22 2012-12-26 中兴通讯股份有限公司 一种开环mimo系统的参考信号处理方法和系统
CN102857458A (zh) * 2011-06-30 2013-01-02 中兴通讯股份有限公司 导频符号确定方法及装置
CN102932299A (zh) * 2011-08-08 2013-02-13 普天信息技术研究院有限公司 一种物理下行控制信道的发送方法
CN103547341A (zh) * 2013-06-08 2014-01-29 华为技术有限公司 传输导频信号的方法、基站和用户设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102857459B (zh) * 2011-06-30 2018-05-01 中兴通讯股份有限公司 解调导频确定方法及装置
US9425923B2 (en) * 2012-07-27 2016-08-23 Nokia Solutions And Networks Oy Method, apparatus, computer program product, computer readable medium and system for fast feedback and response handling in wireless networks
EP2892268B1 (en) * 2012-10-12 2018-03-21 Huawei Technologies Co., Ltd. Method, apparatus and base station for improving user capacity in physical sector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110150120A1 (en) * 2009-12-18 2011-06-23 Nokia Siemens Networks Oy Reference signal resource randomization with SU-MIMO
CN101764642A (zh) * 2009-12-30 2010-06-30 中兴通讯股份有限公司 一种下行控制信息的传输方法及传输系统
CN102843325A (zh) * 2011-06-22 2012-12-26 中兴通讯股份有限公司 一种开环mimo系统的参考信号处理方法和系统
CN102857458A (zh) * 2011-06-30 2013-01-02 中兴通讯股份有限公司 导频符号确定方法及装置
CN102932299A (zh) * 2011-08-08 2013-02-13 普天信息技术研究院有限公司 一种物理下行控制信道的发送方法
CN103547341A (zh) * 2013-06-08 2014-01-29 华为技术有限公司 传输导频信号的方法、基站和用户设备

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