CN105099636B

CN105099636B - A kind of pilot signal transmission method, channel information feedback method and equipment

Info

Publication number: CN105099636B
Application number: CN201410209115.1A
Authority: CN
Inventors: 拉盖施; 高秋彬; 荆梅芳; 田园
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2014-05-16
Filing date: 2014-05-16
Publication date: 2018-07-03
Anticipated expiration: 2034-05-16
Also published as: CN105099636A

Abstract

The invention discloses a kind of pilot signal transmission method, channel information feedback method and equipment.Its pilot signal transmission method includes：Base station determines transfer resource respectively for the first pilot signal and at least two set of second pilot signal, the port number of first pilot signal is the antenna port number of the base station, and the port number for often covering the second pilot signal is less than the antenna port number of the base station but not less than 1；It is weighted using the first wave beam forming vector for first pilot signal, and is weighted often to cover the second pilot signal using the second wave beam forming vector, the second wave beam forming vector is different used by being weighted to the second pilot signal of every set；The second pilot signal by the first pilot signal after weighting and after often set weighting is sent to user equipment on determining transfer resource respectively.Method provided in an embodiment of the present invention, pilot-frequency expense are smaller.In addition, by the way that the first pilot signal is configured, it ensure that and communicated using MIMO technology.

Description

A kind of pilot signal transmission method, channel information feedback method and equipment

Technical field

The present invention relates to wireless communication technology field more particularly to a kind of pilot signal transmission method, feedback of channel information Method and apparatus.

Background technology

Communication industry bound pair three-dimensional multiple-input and multiple-output (3 Dimensions Multiple-Input Multiple- Output, 3D MIMO) research it is more next more, a key property of 3D MIMO is that base station side number of antennas is very more and be The antenna structure of two dimension.By taking single-polarized antenna structure as an example, in 3DMIMO number of antennas for 8 two-dimensional antenna structure such as Fig. 1 a institutes Show, number of antennas be 16 two-dimensional antenna structure as shown in Figure 1 b, number of antennas be 32 two-dimensional antenna structure as illustrated in figure 1 c, The two-dimensional antenna structure that number of antennas is 64 is as shown in Figure 1 d.

In the 3D mimo systems of two-dimensional antenna, wave beam forming can not be carried out only in horizontal direction, in vertical direction It can carry out wave beam forming.One typical case scene is vertical dimension sectorization.By taking the 3D MIMO of 16 antennas as an example, solve below Release the meaning of vertical dimension sectorization.

16 antenna virtualization of base station side is into 4 antenna ports, specifically by 4 antenna virtualizations of vertical dimension into a day Line end mouth, as shown in Fig. 2, being divided into 3 sectors in vertical dimension covers a high building, a set of 4 port channel is configured in each sector State information reference signals (CSI-RS), then need 3 set of 4 port CSI-RS altogether.If user equipment (User Equipment, UE) it is configured single CSI- progress feedbacks, then and the UE is in ownership sector feeding back channel state information.If UE quilts More CSI- processes are configured (such as：3 processes) feedback, then UE feedbacks are more (such as：3) channel state information is covered.Similar approach, such as Fruit base station equipped with 8 antenna ports (or more), need to send 3 set of 8 port in the case where vertical dimension is divided into 3 sectors (or more It is more) CSI-RS.

As it can be seen that the pilot-frequency expense and feedback overhead of above-mentioned vertical dimension sectorization method are very big.

Invention content

The object of the present invention is to provide a kind of pilot signal transmission method, channel information feedback method and equipment, to solve The problem of pilot-frequency expense and big feedback overhead of vertical dimension sectorization method.

The purpose of the present invention is what is be achieved through the following technical solutions：

A kind of pilot signal transmission method, including：

Base station is that at least a set of first pilot signal and at least two set of second pilot signal determine transfer resource respectively, described The port number of first pilot signal is the antenna port number of the base station, and the port number for often covering the second pilot signal is less than the base The antenna port number stood but not less than 1；

The base station is weighted often to cover the first pilot signal using the first wave beam forming vector, and is led for often set second Frequency signal is weighted using the second wave beam forming vector, the second wave beam used by being weighted to the second pilot signal of every set Figuration vector is different；

The base station covered by the first pilot signal after weighting and often weighting after the second pilot signal respectively determine User equipment is sent on transfer resource.

Existing vertical dimension sectorization method, the coverage goal region by way of sectorization.Since each sector must Multiport pilot signal of a set of port number for the antenna port number of base station must be configured, cause pilot-frequency expense larger.It is of the invention real The technical solution of example offer is applied, by being configured the second pilot signal of more set, and often to cover the second pilot signal using different the Two wave beam forming vectors are weighted, so as to coverage goal region.Since the port number of the second pilot signal is less than antenna for base station Port number, therefore, method provided in an embodiment of the present invention, pilot-frequency expense is smaller.In addition, by the way that the first pilot signal is configured, protect It has demonstrate,proved and has been communicated using MIMO technology.

Preferably, the base station is weighted, and be every often to cover the first pilot signal using the first wave beam forming vector The second pilot signal is covered to be weighted using the second wave beam forming vector, including：

The base station is weighted often to cover the first pilot signal using the first vertical dimension wave beam forming vector, and often to cover Second pilot signal is weighted using the second vertical dimension wave beam forming vector.

Preferably, this method further includes：

The base station receives the corresponding channel information of the first pilot signal of the user equipment feedback；

The base station is according to the corresponding channel information of first pilot signal and second pilot signal pair obtained The parameter information answered determines the downlink transfer parameter of the user equipment.

Preferably, the base station receives the corresponding channel information of the first pilot signal of the user equipment feedback, including：

The corresponding channel state information of the first pilot signal of the base station reception user equipment feedback, described first The corresponding channel information of pilot signal is the corresponding channel state information of the first pilot signal, and the channel state information includes mending The order instruction after pre-coding matrix instruction, compensation after repaying and the channel quality instruction after compensation；

This method further includes：The base station receives the second pilot signal of the channel gain maximum of the user equipment feedback Mark；

The base station is according to the corresponding channel information of first pilot signal and second pilot signal pair obtained The parameter information answered determines the downlink transfer parameter of the user equipment, including：

Corresponding second pilot signal is searched according to the mark of the second pilot signal in the base station, and the will found The corresponding wave beam forming vector of two pilot signals is determined as the wave beam forming vector of the user equipment；

After the base station is according to the wave beam forming vector of the user equipment and the corresponding compensation of the first pilot signal Order instruction after pre-coding matrix instruction and compensation determines the pre-coding matrix of the user equipment；And believed according to the first pilot tone Channel quality instruction after number corresponding compensation determines the down channel quality of the user equipment；Under the user equipment Row configured transmission includes the pre-coding matrix of user equipment and the down channel quality of user equipment.

The corresponding channel state information of the first pilot signal of the base station reception user equipment feedback, described first The corresponding channel information of pilot signal is the corresponding channel state information of the first pilot signal, and the channel state information is included not Order instruction after the pre-coding matrix instruction of compensation, compensation and the channel quality instruction after compensation；

The base station uncompensated prelists according to the corresponding wave beam forming vector of the second pilot signal found to described Code matrix instruction compensates；

The corresponding channel state information of the first pilot signal of the base station reception user equipment feedback, described first The corresponding channel information of pilot signal is the corresponding channel state information of the first pilot signal, and the channel state information is included not The pre-coding matrix instruction of compensation, uncompensated order instruction and the instruction of uncompensated channel quality；

This method further includes：The base station receives at least two instruction the second pilot signal letters of the user equipment feedback The information of road gain, each information for indicating the second pilot signal channel gain correspond to a set of second pilot signal；

The base station determines channel gain most according to the information of described at least two the second pilot signal channel gains of instruction The second big pilot signal, and the corresponding wave beam forming vector of the second pilot signal of channel gain maximum is determined as institute State the wave beam forming vector of user equipment；

The base station uses the second pilot signal of channel gain maximum the second pilot signal channel of corresponding instruction The information of gain, uncompensated order instruction corresponding to the first pilot signal and channel quality instruction compensate；And use institute The corresponding wave beam forming vector of the second pilot signal for stating channel gain maximum is corresponding to the first pilot signal uncompensated pre- Encoder matrix instruction compensates；

The base station receives the corresponding at least two groups of channel state informations of the first pilot signal of the user equipment feedback, Every group of channel state information corresponds to a set of second pilot signal；The corresponding channel information of first pilot signal is the first pilot tone The corresponding at least two groups of channel state informations of signal, the channel state information include the pre-coding matrix instruction after compensation, mend Channel quality instruction after order instruction and compensation after repaying；

The base station determines corresponding second pilot signal of one group of channel state information, and by second pilot signal pair The wave beam forming vector answered is determined as the wave beam forming vector of the user equipment；

After the base station in the wave beam forming vector of the user equipment and one group of channel state information according to compensating Order instruction after pre-coding matrix instruction and compensation determines the pre-coding matrix of the user equipment；And according to one group of channel shape Channel quality instruction after being compensated in state information determines the down channel quality of the user equipment；Under the user equipment Row configured transmission includes the pre-coding matrix of user equipment and the down channel quality of user equipment.

A kind of channel information feedback method, including：

User equipment detects at least a set of the first pilot signal and at least two weighted using the first wave beam forming vector The second pilot signal that set is weighted using the second wave beam forming vector, the used by being weighted to the second pilot signal of every set Two wave beam forming vectors are different, and the port number of first pilot signal is the antenna port number of base station, often cover second and lead The port number of frequency signal is less than the antenna port number of the base station but not less than 1；

The user equipment often covers the corresponding channel information of the first pilot signal to the base station feedback.

Existing vertical dimension sectorization method, since base station is the antenna end that a set of port number of each sector configuration is base station The multiport pilot signal of mouth number, therefore, pilot-frequency expense is larger, correspondingly, causing user equipment feedback overhead larger.The present invention The technical solution that embodiment provides, by being configured the second pilot signal of more set, and for often cover the second pilot signal use it is different Second wave beam forming vector is weighted, so as to coverage goal region.Since the port number of the second pilot signal is less than base station day Line port number, therefore, method provided in an embodiment of the present invention, the channel information that user equipment needs are fed back is less, feedback overhead It is smaller.

Preferably,

The user equipment is according to the second pilot signal of channel gain maximum the second pilot signal channel of corresponding instruction The information of gain and instruction often cover the information of the first pilot signal channel gain, determine often to cover the first pilot signal respectively corresponding Beam forming gain；

The user equipment, which uses, often covers the corresponding beam forming gain of the first pilot signal respectively to the first pilot tone of every set The channel estimation value of signal is adjusted, and determines often to cover the corresponding channel of the first pilot signal using the channel estimation value after adjustment Status information, after the channel state information includes the pre-coding matrix instruction after compensation, the order instruction after compensation and compensation Channel quality indicates；

The user equipment often covers the corresponding channel information of the first pilot signal to the base station feedback, including：

The user equipment often covers the corresponding channel state information of the first pilot signal to the base station feedback；

This method further includes：The user equipment is to the mark of the second pilot signal of base station feedback channel gain maximum Know.

Preferably, the user equipment often covers the corresponding channel information of the first pilot signal to the base station feedback, including：

The user equipment is according to the second pilot signal of channel gain maximum the second pilot signal channel of corresponding instruction The information of gain and the information for often covering the first pilot signal channel gain of corresponding instruction of the first pilot signal, determine often to cover respectively The corresponding beam forming gain of first pilot signal；

The user equipment covers the first pilot signal using the corresponding beam forming gain of the first pilot signal is often covered to every Channel estimation value be adjusted, determined after often covering the corresponding compensation of the first pilot signal using the channel estimation value after adjustment Channel quality instruction after order instruction and compensation；

The user equipment often covers the corresponding channel state information of the first pilot signal, the channel to the base station feedback Status information includes the order instruction after uncompensated pre-coding matrix instruction, compensation and the channel quality instruction after compensation；

The user equipment often covers the corresponding channel state information of the first pilot signal, the channel to the base station feedback Status information includes uncompensated pre-coding matrix instruction, uncompensated order instruction and the instruction of uncompensated channel quality；

This method further includes：The user equipment indicates that the second pilot signal channel increases to the base station feedback at least two The information of benefit, each information for indicating the second pilot signal channel gain correspond to a set of second pilot signal.

Preferably, before the user equipment often covers the corresponding channel information of the first pilot signal to the base station feedback, This method further includes：

The user equipment increases according to the second pilot signal of often set received the second pilot signal channel of corresponding instruction The information of the first pilot signal channel gain of information and instruction of benefit determines that often covering the corresponding wave beam of the second pilot signal assigns respectively Shape gain；

The user equipment, which uses, often covers the corresponding beam forming gain of the second pilot signal respectively to the first pilot tone of every set The channel estimation value of signal is adjusted, and utilizes the channel estimation value difference after often covering the corresponding adjustment of the second pilot signal true Fixed often to cover the corresponding channel state information of the first pilot signal, the pre-coding matrix that the channel state information includes after compensation refers to Show, compensate after order instruction and after compensation channel quality instruction；

The user equipment often covers the corresponding at least two groups of channel state informations of the first pilot signal to the base station feedback.

Based on the same inventive concept of method, the embodiment of the present invention also provides a kind of base station, including：

Transfer resource determining module, for being at least a set of first pilot signal and at least two set of second pilot signal difference Determine transfer resource, the port number of first pilot signal is the antenna port number of the base station, often covers the second pilot signal Port number be less than the antenna port number of the base station but not less than 1；

Wave beam forming module, for being weighted, and be using the first wave beam forming vector often to cover the first pilot signal It often covers the second pilot signal to be weighted using the second wave beam forming vector, the second pilot signal of every set is weighted and is used The second wave beam forming vector it is different；

Pilot signal sending module, the second pilot signal for the first pilot signal after weighting and after often set weighting Respectively user equipment is sent on determining transfer resource.

Existing vertical dimension sectorization method, the coverage goal region by way of sectorization.Since each sector must Multiport pilot signal of a set of port number for the antenna port number of base station must be configured, cause pilot-frequency expense larger.It is of the invention real The technical solution of example offer is applied, by being configured the second pilot signal of more set, and often to cover the second pilot signal using different the Two wave beam forming vectors are weighted, so as to coverage goal region.Since the port number of the second pilot signal is less than antenna for base station Port number, therefore, base station provided in an embodiment of the present invention, pilot-frequency expense is smaller.In addition, by the way that the first pilot signal is configured, protect It has demonstrate,proved and has been communicated using MIMO technology.

Preferably, the wave beam forming vector is used for：

It is weighted for the first pilot signal of every set using the first vertical dimension wave beam forming vector, and often to cover the second pilot tone Signal is weighted using the second vertical dimension wave beam forming vector.

Preferably, further including downlink transfer parameter determination module, it is used for：

Receive the corresponding channel information of the first pilot signal of the user equipment feedback；

According to the corresponding channel information of first pilot signal parameter corresponding with second pilot signal obtained Information determines the downlink transfer parameter of the user equipment.

Preferably, the downlink transfer parameter determination module is specifically used for：

The corresponding channel state information of the first pilot signal and the channel gain for receiving user equipment feedback are maximum The mark of second pilot signal, the corresponding channel information of first pilot signal are the corresponding channel status of the first pilot signal Information, the channel state information include the pre-coding matrix instruction after compensation, the order instruction after compensation and the channel after compensation Quality indicates；

According to the mark of the second pilot signal, corresponding second pilot signal is searched, and the second pilot tone found is believed Number corresponding wave beam forming vector is determined as the wave beam forming vector of the user equipment；

According to the precoding square after the wave beam forming of user equipment vector and the corresponding compensation of the first pilot signal Order instruction after battle array instruction and compensation determines the pre-coding matrix of the user equipment；It is and corresponding according to the first pilot signal Channel quality instruction after compensation determines the down channel quality of the user equipment；The downlink transfer ginseng of the user equipment Number includes the pre-coding matrix of user equipment and the down channel quality of user equipment.

The corresponding channel state information of the first pilot signal and the channel gain for receiving user equipment feedback are maximum The mark of second pilot signal, the corresponding channel information of first pilot signal are the corresponding channel status of the first pilot signal Information, the channel state information include the order instruction after uncompensated pre-coding matrix instruction, compensation and the channel after compensation Quality indicates；

The uncompensated pre-coding matrix is referred to according to the corresponding wave beam forming vector of the second pilot signal found Show and compensate；

Receive the corresponding channel state information of the first pilot signal of user equipment feedback and at least two instructions the The information of two pilot signal channel gains, each information for indicating the second pilot signal channel gain correspond to a set of second pilot tone letter Number, the corresponding channel information of first pilot signal is the corresponding channel state information of the first pilot signal, the channel shape State information includes uncompensated pre-coding matrix instruction, uncompensated order instruction and the instruction of uncompensated channel quality；

According to the information of described at least two the second pilot signal channel gains of instruction, the second of channel gain maximum is determined Pilot signal, and the corresponding wave beam forming vector of the second pilot signal of channel gain maximum is determined as the user and is set Standby wave beam forming vector；

Use the letter of the second pilot signal of channel gain maximum the second pilot signal channel gain of corresponding instruction Breath compensates the corresponding order instruction of the first pilot signal and channel quality instruction；And use channel gain maximum The corresponding wave beam forming vector of second pilot signal uncompensated pre-coding matrix instruction corresponding to the first pilot signal carries out Compensation；

Preferably, the downlink transfer parameter determination module is additionally operable to：

Receive the corresponding at least two groups of channel state informations of the first pilot signal of the user equipment feedback；Described first The corresponding channel information of pilot signal is the corresponding at least two groups of channel state informations of the first pilot signal, the channel status letter Breath includes the pre-coding matrix instruction after compensation, the order instruction after compensation and the channel quality instruction after compensation；

Determine corresponding second pilot signal of the channel state information after one group of compensation, and by second pilot signal pair The wave beam forming vector answered is determined as the wave beam forming vector of the user equipment；

According to the precoding square after compensation in the wave beam forming of user equipment vector and one group of channel state information Order instruction after battle array instruction and compensation determines the pre-coding matrix of the user equipment；And according in one group of channel state information Channel quality instruction after compensation determines the down channel quality of the user equipment；The downlink transfer ginseng of the user equipment Number includes the pre-coding matrix of user equipment and the down channel quality of user equipment.

Processor, the processor are configured as performing the computer program for having following function：It is at least a set of first to lead Frequency signal and at least two set of second pilot signal determine transfer resource respectively, and the port number of first pilot signal is the base The antenna port number stood, the port number for often covering the second pilot signal are less than the antenna port number of the base station but not less than 1；It is every It covers the first pilot signal to be weighted using the first wave beam forming vector, and assign using the second wave beam often to cover the second pilot signal Shape vector is weighted, and the second wave beam forming vector is different used by being weighted to the second pilot signal of every set；It will The second pilot signal after the first pilot signal and often set weighting after weighting is sent to use on determining transfer resource respectively Family equipment；

Memory, the memory are configured as preserving the code of above computer program.

Based on the same inventive concept of method, the embodiment of the present invention also provides a kind of user equipment, including：

Pilot signal detection module, for detecting at least a set of the first pilot tone weighted using the first wave beam forming vector Signal and at least two sets the second pilot signals weighted using the second wave beam forming vector, carry out the second pilot signal of every set The second wave beam forming vector is different used by weighting, and the port number of first pilot signal is the antenna port of base station Number, the port number for often covering the second pilot signal are less than the antenna port number of the base station but not less than 1；

Feedback of channel information module, for often covering the corresponding channel information of the first pilot signal to the base station feedback.

Preferably, the feedback of channel information module is specifically used for：

According to the second pilot signal of channel gain maximum it is corresponding instruction the second pilot signal channel gain information and Instruction often covers the information of the first pilot signal channel gain, determines that often covering the corresponding wave beam forming of the first pilot signal increases respectively Benefit；

The channel of the first pilot signal of every set is estimated respectively using the corresponding beam forming gain of the first pilot signal is often covered Evaluation is adjusted, and the corresponding channel state information of the first pilot signal, the letter are determined using the channel estimation value after adjustment Channel state information includes the pre-coding matrix instruction after compensation, the order instruction after compensation and the channel quality instruction after compensation；

The second of the corresponding channel state information of the first pilot signal and channel gain maximum is often covered to the base station feedback The mark of pilot signal.

According to the second pilot signal of channel gain maximum it is corresponding instruction the second pilot signal channel gain information and The information of the first pilot signal the first pilot signal channel gain of corresponding instruction is often covered, determines often to cover the first pilot signal respectively Corresponding beam forming gain；

Using often cover the corresponding beam forming gain of the first pilot signal to it is every set the first pilot signal channel estimation value It is adjusted, determines often to cover the order instruction after the corresponding compensation of the first pilot signal and compensation using the channel estimation value after adjustment Channel quality instruction afterwards；

The second of the corresponding channel state information of the first pilot signal and channel gain maximum is often covered to the base station feedback The mark of pilot signal, the channel state information include the order instruction and benefit after uncompensated pre-coding matrix instruction, compensation Channel quality instruction after repaying.

The corresponding channel state information of the first pilot signal is often covered to the base station feedback and at least two instructions second are led The information of frequency signaling channel gain, each information for indicating the second pilot signal channel gain correspond to a set of second pilot signal, The channel state information refers to including uncompensated pre-coding matrix instruction, uncompensated order instruction and uncompensated channel quality Show.

According to the information for often covering the second pilot signal channel gain of corresponding instruction of the second pilot signal received and refer to Show the information of the first pilot signal channel gain, determine often to cover the corresponding beam forming gain of the second pilot signal respectively；

Using often covering the corresponding beam forming gain of the second pilot signal respectively to the channel estimation value of the first pilot signal It is adjusted, and the channel estimation value after often covering the corresponding adjustment of the second pilot signal is utilized to determine often to cover the first pilot tone letter respectively Number corresponding channel state information, the channel state information includes the pre-coding matrix instruction after compensation, the order after compensation refers to Channel quality instruction after showing and compensating；

The corresponding at least two groups of channel state informations of the first pilot signal are often covered to the base station feedback.

Processor, the processor are configured as performing the computer program for having following function：Detect at least a set of make The first pilot signal weighted with the first wave beam forming vector and at least two sets second weighted using the second wave beam forming vector Pilot signal, the second wave beam forming vector is different used by being weighted to the second pilot signal of every set, and described first The port number of pilot signal is the antenna port number of base station, and the port number for often covering the second pilot signal is less than the antenna of the base station Port number but not less than 1；The corresponding channel information of the first pilot signal is often covered to the base station feedback；

Description of the drawings

Fig. 1 a are the two-dimensional antenna structure diagram that number of antennas is 8；

Fig. 1 b are the two-dimensional antenna structure diagram that number of antennas is 16；

Fig. 1 c are the two-dimensional antenna structure diagram that number of antennas is 32；

Fig. 1 d are the two-dimensional antenna structure diagram that number of antennas is 64；

Fig. 2 is vertical dimension sectorization application scenarios schematic diagram；

Fig. 3 is pilot signal transmission method flow chart provided in an embodiment of the present invention；

Fig. 4 is a kind of antenna for base station packet mode schematic diagram provided in an embodiment of the present invention；

Fig. 5 is application scenarios schematic diagram provided in an embodiment of the present invention；

Fig. 6 weights schematic diagram for the first pilot signal provided in an embodiment of the present invention；

Fig. 7 weights schematic diagram for a kind of second pilot signal provided in an embodiment of the present invention；

Fig. 8 weights schematic diagram for another second pilot signal provided in an embodiment of the present invention；

Fig. 9 is channel information feedback method flow chart provided in an embodiment of the present invention；

Figure 10 is base station schematic diagram provided in an embodiment of the present invention；

Figure 11 is user equipment schematic diagram provided in an embodiment of the present invention.

Specific embodiment

In 3D mimo systems, the mutiple antennas (or antenna element) of base station is divided into k groups, preferably, every group of antenna Number identical (various embodiments of the present invention will be illustrated by taking the preferable packet mode as an example).For example, for horizontal and vertical two The aerial array of arrangement is tieed up, each array antenna can be divided into one group or one group will be divided into per a line antenna.For horizontal and The dual polarized antenna of vertical two-dimensional arrangements, can be divided into two groups by an array antenna according to polarization direction.

Every group of antenna of base station is virtually an antenna port.For example, the mutiple antennas of base station is divided into k groups, then the base station There is k antenna port, each antenna port corresponds to one group of antenna.

Below in conjunction with attached drawing, the dividing mode based on above-mentioned antenna for base station is to technical solution provided in an embodiment of the present invention It is described in detail.

A kind of pilot signal transmission method provided in an embodiment of the present invention is as shown in figure 3, specifically include following operation：

Step 300, base station are that at least a set of first pilot signal and at least two set of second pilot signal determine transmission respectively Resource, the port number of the first pilot signal are the antenna port number of base station, and the port number for often covering the second pilot signal is less than base station Antenna port number but not less than 1.

In the embodiment of the present invention, the transfer resource of pilot signal includes several specific time frequency units.Time frequency unit can be with It is determined by parameters such as the time-frequency locations that is occupied in period of sub-frame, sub-frame offset, subframe.

The tricks of second pilot signal of base station configuration is related with the dividing mode for the target area that needs cover.Target area Domain is divided into N number of overlay area, then configuration N in base station covers the second pilot signal, and wherein N is the integer not less than 2.

The port number for often covering the second pilot signal may be the same or different.

Step 310, base station are weighted using the first wave beam forming vector often to cover the first pilot signal, and are often to cover the Two pilot signals are weighted using the second wave beam forming vector, second used by being weighted to the second pilot signal of every set Wave beam forming vector is different.

Wherein, the first wave beam forming vector for often covering the first pilot signal can be the same or different.

It is weighted for pilot signal using wave beam forming vector, i.e., wave beam forming is carried out to pilot signal.

The second pilot signal of each set is weighted using the second different wave beam forming vectors, so that it is respectively to difference Direction send.

In the embodiment of the present invention, the region that the first pilot signal is covered is not less than the area that the second pilot signal of each set covers The sum of domain.

Step 320, base station cover the second pilot signal after weighting by the first pilot signal after weighting and often respectively true User equipment is sent on fixed transfer resource.

Specifically, base station sends the first pilot signal after weighting on the transfer resource determined for the first pilot signal To user equipment, and by the second pilot signal after corresponding weighting on the transfer resource determined often to cover the second pilot signal It is sent to user equipment.

In the embodiment of the present invention, the first pilot signal is multiport pilot signal, and the second pilot signal can be multiport Pilot signal, or single port pilot signal.For M port pilot signal, port number M.

In the embodiment of the present invention, to reduce pilot-frequency expense, preferably, a set of first pilot signal is configured in base station.Preferably, Second pilot signal is single port pilot signal.

In the embodiment of the present invention, pilot signal can with but be not limited only to be CSI-RS, public reference signal (CRS) etc..

By taking antenna for base station packet mode shown in Fig. 4 as an example, two-dimensional array of the base station equipped with 16 antennas, each column is divided into one Group is divided into 4 groups.Based on this, as shown in figure 5,1 set of 4 port pilot signal, each end of the 4 port pilot signal is configured in base station A row of antenna shown in mouth corresponding diagram 4, often corresponding pilot signal is added using identical wave beam forming vector on array antenna Power is directed toward fixed-direction, covers entire building.In addition 3 single port pilot signals are configured in base station, different wave beams is respectively adopted and assigns Shape vector is weighted, and is pointed in different directions the different zones to cover building.

Based on above-mentioned arbitrary pilot signal transmission method embodiment, preferably, base station uses first for the first pilot signal Vertical dimension wave beam forming vector (i.e. the wave beam forming vector of vertical direction) is weighted.Assuming that there are 16 antennas in base station, this 16 A antenna forms aerial array by horizontal and vertical Two dimensional Distribution.4 antennas in vertical direction are divided into one group, and every group of antenna is empty Plan turns to an antenna port.So, the first pilot signal be 4 port pilot signal S (0) S (1) S (2) S (3), i-th group of antenna Send the pilot signal S (i), i=0,1 of i-th of port in 4 port pilot signals, 2,3.Specifically, as shown in fig. 6, base station It is vectorial [w (0) w (1) w (2) w (3)] using the first vertical dimension wave beam forming^TTo i-th of pilot tone in 4 port pilot signals After signal S (i) is weighted, sent out from i-th group of (the i.e. i-th row) antenna.

Based on above-mentioned arbitrary pilot signal transmission method embodiment, preferably, base station uses second for the second pilot signal Vertical dimension wave beam forming vector (i.e. the wave beam forming vector of vertical direction) is weighted.Assuming that there are 16 antennas in base station, this 16 A antenna forms aerial array by horizontal and vertical Two dimensional Distribution.4 antennas in vertical direction are divided into one group, and every group of antenna is empty Plan turns to an antenna port.By the second simple signal for single port pilot signal, to enumerate several weighting schemes.

If single port pilot signal (i.e. the second pilot signal) is sent out, such as sent out from the 0th array antenna from one group of antenna, Corresponding weighting scheme is as shown in Figure 7：Single port pilot signal s on the transfer resource of n-th of single port pilot signal_n(0) With the corresponding second beamforming weighting vector [w of the transfer resource of n-th of single port pilot signal_n(0) w_n(1) w_n(2) w_n (3)]^TAfter being weighted, sent out from the 0th array antenna, other array antennas on the transfer resource of n-th of single port pilot signal not Pilot signal transmitted.It should be pointed out that each single port pilot signal can be sent out from same array antenna, it can also be from difference Array antenna is sent out, and this is not limited by the present invention.

If single port pilot signal is sent out from multigroup antenna, such as is sent out from 4 groups of antennas, corresponding weighting scheme As shown in Figure 8：The corresponding single port pilot signal s of transfer resource of n-th of single port pilot signal_n(0) horizontal position wave is first used Beam figuration vector (that is, beamforming weighting vector of horizontal direction) [u (0) u (1) u (2) u (3)]^TAfter weighting, then with n-th The corresponding second vertical dimension beamforming weighting vector [w of transfer resource of a single port pilot signal_n(0) w_n(1) w_n(2) w_n(3)]^TIt is sent out from all antennas after weighting.It should be pointed out that it can also be sent out from a part of antenna, such as first two columns It is sent out on antenna, single port pilot signal s_n(0) first with horizontal dimension beamforming weighting vector [u (0) u (1)]^TAfter weighting, then With the second vertical dimension beamforming weighting vector [w_n(0) w_n(1) w_n(2) w_n(3)]^TIt is sent out on two array antennas of the past after weighting.

Based on above-mentioned arbitrary pilot sending method embodiment, base station also receives the first pilot signal pair of user equipment feedback The channel information answered；According to the corresponding channel information of the first pilot signal parameter corresponding with second pilot signal obtained Information determines the downlink transfer parameter of user equipment.

If the corresponding channel information of the first pilot signal of user equipment feedback is the corresponding channel of the first pilot signal Status information, correspondingly, the mark of user equipment also the second pilot signal of feedback channel gain maximum.Wherein, channel status Information may comprise compensating for after pre-coding matrix instruction (PMI), compensation after order instruction (RI) and compensate after channel quality It indicates (CQI).So, base station determines that the specific implementation of the downlink transfer parameter of user equipment is as follows：

Base station corresponding second pilot signal is searched, and find second is led according to the mark of the second pilot signal The corresponding wave beam forming vector of frequency signal is determined as the wave beam forming vector of user equipment；

Base station is according to the precoding square after the wave beam forming vector of user equipment and the corresponding compensation of the first pilot signal Order instruction after battle array instruction and compensation determines the pre-coding matrix of user equipment；And according to the corresponding compensation of the first pilot signal Channel quality instruction afterwards determines the down channel quality of user equipment.It is for example, pre- after the corresponding compensation of the first pilot signal Encoder matrix indicates that pre-coding matrix corresponding with the order instruction after compensation is V, and the wave beam forming vector of user equipment is W_n, then The pre-coding matrix of user equipment isOr

Wherein, the downlink transfer parameter of user equipment includes the pre-coding matrix of user equipment and the downlink letter of user equipment Road quality.

Base station determines the wave beam forming vector of user equipment, that is, determines the direction of user equipment.

Wherein, channel state information can also include the order instruction and benefit after uncompensated pre-coding matrix instruction, compensation Channel quality instruction after repaying.So, base station determines that the specific implementation of the downlink transfer parameter of user equipment is as follows：

Base station corresponding second pilot signal is searched, and find second is led according to the mark of the second pilot signal The corresponding wave beam forming vector of frequency signal is determined as the wave beam forming vector of the user equipment；

Base station refers to uncompensated pre-coding matrix according to the corresponding wave beam forming vector of the second pilot signal found Show and compensate；

Base station is according to the precoding square after the wave beam forming vector of user equipment and the corresponding compensation of the first pilot signal Order instruction after battle array instruction and compensation determines the pre-coding matrix of user equipment；And according to the corresponding compensation of the first pilot signal Channel quality instruction afterwards determines the down channel quality of user equipment.

If the corresponding channel information of the first pilot signal of user equipment feedback is the corresponding channel of the first pilot signal Status information, then, user equipment also feeds back the information of at least two instruction the second pilot signal channel gains, each indicates The information of two pilot signal channel gains corresponds to a set of second pilot signal.Wherein, channel state information includes uncompensated pre- Encoder matrix instruction does not compensate order instruction and the instruction of uncompensated channel quality.So, base station determines that the downlink of user equipment passes The specific implementation of defeated parameter is as follows：

Base station determines the second of channel gain maximum according to the information of at least two the second pilot signal channel gains of instruction Pilot signal, and the corresponding wave beam forming vector of the second pilot signal of channel gain maximum is determined as to the wave beam of user equipment Figuration vector；

Base station uses the letter of the second pilot signal of channel gain maximum the second pilot signal channel gain of corresponding instruction Breath, uncompensated order instruction corresponding to the first pilot signal and the instruction of uncompensated channel quality compensate；And use letter The corresponding wave beam forming vector of the second pilot signal uncompensated precoding corresponding to the first pilot signal of road gain maximum Matrix instruction compensates；

Base station is according to the precoding square after the wave beam forming vector of user equipment and the corresponding compensation of the first pilot signal Order instruction after battle array instruction and compensation determines the pre-coding matrix of user equipment；And according to the corresponding compensation of the first pilot signal Channel quality instruction afterwards determines the down channel quality of user equipment.For example, the corresponding pre-coding matrix of the first pilot signal The pre-coding matrix that order instruction after indicating and compensating determines is V, and the wave beam forming vector of user equipment is W_n, then user equipment Pre-coding matrix beOr

Wherein, the information of the second pilot signal channel gain of instruction can be RSRP values, the corresponding wave of the second pilot signal Beam figuration gain etc. information.

If the corresponding channel information of the first pilot signal of user equipment feedback is corresponding at least for the first pilot signal Two groups of channel state informations, optionally, user also feed back the mark of corresponding second pilot signal of every group of channel state information.Its In, channel state information includes the pre-coding matrix instruction after compensation, the order instruction after compensation and the channel quality after compensation and refers to Show.So, base station determines that the specific implementation of the downlink transfer parameter of user equipment is as follows：

Base station determines corresponding second pilot signal of one group of channel state information, and by the corresponding wave of the second pilot signal Beam figuration vector is determined as the wave beam forming vector of user equipment；

Precoding after compensation of the base station in the wave beam forming vector of user equipment and one group of channel state information Order instruction after matrix instruction and compensation determines the pre-coding matrix of user equipment；And according in one group of channel state information Channel quality instruction after compensation determines the down channel quality of user equipment.For example, the compensation in one group of channel state information The pre-coding matrix that order instruction after rear pre-coding matrix instruction and compensation determines is V, the wave beam forming vector of user equipment For W_n, then the pre-coding matrix of user equipment beOr

Wherein, base station is selected from the multigroup channel state information received there are many one group of realization methods, the present invention This is not construed as limiting.For example, it can be indicated according to the channel quality after compensation, one group of channel status for selecting channel quality best Information.

Wherein, base station can be according to corresponding second pilot tone of channel state information after every group of compensation that user equipment is fed back The mark of signal determines corresponding second pilot signal of the channel state information after one group of compensation.If user equipment is not anti- The mark of corresponding second pilot signal of every group of channel state information is presented, base station can determine one group of channel status letter with implicit instruction Cease corresponding second pilot signal.

Channel information feedback method provided in an embodiment of the present invention is as shown in figure 9, specifically include following operation：

Step 900, user equipment detect at least a set of the first pilot signal weighted using the first wave beam forming vector, At least two sets the second pilot signals weighted using the second wave beam forming vector.

Wherein, the second wave beam forming vector is different used by being weighted to the second pilot signal of every set, and first The port number of pilot signal is the antenna port number of base station, and the port number for often covering the second pilot signal is less than the antenna port of base station It counts but not less than 1.

Step 910, user equipment often cover the corresponding channel information of the first pilot signal to base station feedback.

It should be pointed out that in the method for feedback channel information, there is the embodiment of the method phase with above-mentioned pilot signal transmitted Same or similar technical characteristic, is referred to the description of above method embodiment, will not be repeated again and repeat.

There are many modes of user equipment feedback channel information, is enumerated by taking a set of first pilot signal as an example below wherein several Kind.

Mode one：

User equipment is according to the second pilot signal channel gain of corresponding instruction of the second pilot signal of channel gain maximum Information and instruction the first pilot signal channel gain information, determine beam forming gain；

User equipment is adjusted the channel estimation value of the first pilot signal using beam forming gain, after adjustment Channel estimation value determine the corresponding channel state information of the first pilot signal, which includes prelisting after compensation Order instruction after the instruction of code matrix, compensation and the channel quality instruction after compensation；

User equipment to the corresponding channel state information of the first pilot signal of base station feedback and channel gain it is maximum second The mark of pilot signal.

Wherein, user equipment determines channel gain, Jin Ercha according to the information of the second pilot signal channel gain of instruction Find the second pilot signal of channel gain maximum.

The information for indicating pilot signal channel gain can be RSRP values, beam forming gain etc..

Using the first pilot signal as multiport pilot signal, the second pilot signal is single port pilot signal, indicates pilot tone The information of signaling channel gain is for RSRP values, the RSRP values of the single port pilot signal of channel gain maximum are RSRP₁, it is more The RSRP values of port pilot signal are RSRP_h, then beam forming gain G=RSRP₁-RSRP_h.Wherein, multiport pilot signal RSRP values can be the multiport RSRP RSRP values of a port or RSRP values in all of the port are averaged wherein Value.

For example, the channel matrix that user equipment estimates multiport pilot signal is H, after being adjusted with beam forming gain G Channel matrix for REAL (G) × H, wherein, REAL (G)=10^G/10。

In another example the data power assumed when being adjusted with beam forming gain and calculated channel state information and pilot signal work( The ratio of rate.Assuming that the ratio of network configuration is P_c, then the ratio after being adjusted with beam forming gain is GP_c。

Mode two：

User equipment is adjusted the channel estimation value of the first pilot signal using beam forming gain, after adjustment Channel estimation value determine compensation after order instruction and after compensation channel quality instruction；

Wherein, after channel state information includes order instruction and compensation after uncompensated pre-coding matrix instruction, compensation Channel quality indicates.

Mode three：

User equipment is led to the corresponding channel state information of the first pilot signal of base station feedback and at least two instructions second The information of frequency signaling channel gain, each information for indicating the second pilot signal channel gain correspond to a set of second pilot signal.

Wherein, user equipment includes uncompensated pre- to the corresponding channel state information of the first pilot signal of base station feedback Encoder matrix instruction, uncompensated order instruction and the instruction of uncompensated channel quality.

Mode three：

User equipment often covers the second pilot signal channel gain of corresponding instruction of the second pilot signal according to what is received The information of the first pilot signal channel gain of information and instruction determines that often covering the corresponding wave beam forming of the second pilot signal increases respectively Benefit；

User equipment, which uses, often covers the corresponding beam forming gain of the second pilot signal respectively to the letter of the first pilot signal Road estimated value is adjusted, and the channel estimation value after often covering the corresponding adjustment of the second pilot signal is utilized to determine that first leads respectively The corresponding channel state information of frequency signal, the channel state information include the pre-coding matrix instruction after compensation, the order after compensation Channel quality instruction after indicating and compensating；

User equipment is to the corresponding at least two groups of channel state informations of the first pilot signal of base station feedback and every group of channel shape The mark of corresponding second pilot signal of state information.

For example, user equipment receives a set of 4 port pilot signal (the first pilot signal) and 3 single port pilot tone letters Number (the second pilot signal).The RSRP values of n-th of single port pilot signal are RSRP_n, the RSRP values of 4 port pilot signals are RSRP_h, then the corresponding beam forming gain G of n-th of single port pilot signal_n=RSRP_n-RSRP_h.Respectively using each single-ended The corresponding beam forming gain of mouth pilot signal is adjusted the channel estimation value of 4 port pilot signals, after obtaining 3 adjustment Channel estimation value, then respectively using this 3 adjustment after channel estimation value determine the corresponding channel status of the first pilot signal Information.

For example, the channel matrix that user equipment estimates 4 port pilot signals is H, with beam forming gain G_nAfter adjustment Channel matrix be REAL (G_n) × H, wherein, REAL (G_n)=10^Gn/10。

In another example the data power assumed when being adjusted with beam forming gain and calculated channel state information and pilot signal work( The ratio of rate.Assuming that the ratio of network configuration is P_c, then the ratio after being adjusted with beam forming gain is G_nP_c。

Based on the same inventive concept of method, the embodiment of the present invention also provides a kind of base station, as shown in Figure 10, including：

Transfer resource determining module 101, for being at least a set of first pilot signal and at least two set of second pilot signal Transfer resource is determined respectively, and the port number of first pilot signal is the antenna port number of the base station, often covers the second pilot tone The port number of signal is less than the antenna port number of the base station but not less than 1；

Wave beam forming module 102, for being weighted often to cover the first pilot signal using the first wave beam forming vector, and It is weighted for the second pilot signal of every set using the second wave beam forming vector, the second pilot signal of every set is weighted and is adopted Second wave beam forming vector is different；

Pilot signal sending module 103, for often cover after the first pilot signal and often set weighting second after weighting Pilot signal is sent to user equipment on determining transfer resource respectively.

Preferably, the wave beam forming vector is used for：

Based on the same inventive concept of method, the embodiment of the present invention also provides a kind of user equipment, as shown in figure 11, packet It includes：

Pilot signal detection module 110, it is at least a set of using the first of the weighting of the first wave beam forming vector for detecting Pilot signal and at least two sets the second pilot signals weighted using the second wave beam forming vector, to the second pilot signal of every set The second wave beam forming vector is different used by being weighted, and the port number of first pilot signal is the antenna of base station Port number, the port number for often covering the second pilot signal are less than the antenna port number of the base station but not less than 1；

Feedback of channel information module 111, for often covering the corresponding channel information of the first pilot signal to the base station feedback.

It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the present invention Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the present invention The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of product.

The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real The device of function specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.

These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or The function of being specified in multiple boxes.

These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of pilot signal transmission method, which is characterized in that including：

Base station be at least a set of first pilot signal and at least two set of second pilot signal respectively determine transfer resource, described first The port number of pilot signal is the antenna port number of the base station, and the port number for often covering the second pilot signal is less than the base station Antenna port number but not less than 1；

The base station is weighted often to cover the first pilot signal using the first wave beam forming vector, and often to cover the second pilot tone letter Number use the second wave beam forming vector is weighted, the second wave beam forming used by being weighted to the second pilot signal of every set Vector is different；

The base station covers the second pilot signal after weighting by the first pilot signal after weighting and often respectively in determining transmission User equipment is sent in resource；

The method further includes：

The base station receives the corresponding channel state information of the first pilot signal of the user equipment feedback, the channel status Information includes the pre-coding matrix instruction after compensation, the order instruction after compensation and the channel quality instruction after compensation；

The base station receives the mark of the second pilot signal of the channel gain maximum of the user equipment feedback；

The base station corresponding second pilot signal is searched, and find second is led according to the mark of the second pilot signal The corresponding wave beam forming vector of frequency signal is determined as the wave beam forming vector of the user equipment；

The base station is according to prelisting after the wave beam forming vector of the user equipment and the corresponding compensation of the first pilot signal Order instruction after the instruction of code matrix and compensation determines the pre-coding matrix of the user equipment；And according to the first pilot signal pair Channel quality instruction after the compensation answered determines the down channel quality of the user equipment；

Or

The method further includes：

The base station receives the corresponding channel state information of the first pilot signal of the user equipment feedback, the channel status Information includes the order instruction after uncompensated pre-coding matrix instruction, compensation and the channel quality instruction after compensation；

The base station is according to the corresponding wave beam forming vector of the second pilot signal found to the uncompensated precoding square Battle array instruction compensates；

Or

The method further includes：

The base station receives the corresponding channel state information of the first pilot signal of the user equipment feedback, the channel status Information includes uncompensated pre-coding matrix instruction, uncompensated order instruction and the instruction of uncompensated channel quality；

The base station receives the information of at least two the second pilot signal channel gains of instruction of the user equipment feedback, each Indicate that the information of the second pilot signal channel gain corresponds to a set of second pilot signal；

The base station determines channel gain maximum according to the information of described at least two the second pilot signal channel gains of instruction Second pilot signal, and the corresponding wave beam forming vector of the second pilot signal of channel gain maximum is determined as the use The wave beam forming vector of family equipment；

The base station uses the second pilot signal channel gain of corresponding instruction of the second pilot signal of channel gain maximum Information, uncompensated order instruction corresponding to the first pilot signal and channel quality instruction compensate；And use the letter The corresponding wave beam forming vector of the second pilot signal uncompensated precoding corresponding to the first pilot signal of road gain maximum Matrix instruction compensates；

Or

The method further includes：

The corresponding at least two groups of channel state informations of the first pilot signal of the base station reception user equipment feedback, every group Channel state information corresponds to a set of second pilot signal, the channel state information include the pre-coding matrix instruction after compensation, Channel quality instruction after order instruction and compensation after compensation；

The base station determines corresponding second pilot signal of one group of channel state information, and second pilot signal is corresponding Wave beam forming vector is determined as the wave beam forming vector of the user equipment；

The base station is according to prelisting after compensation in the wave beam forming vector of the user equipment and one group of channel state information Order instruction after the instruction of code matrix and compensation determines the pre-coding matrix of the user equipment；And believed according to one group of channel status Channel quality instruction after being compensated in breath determines the down channel quality of the user equipment.

2. according to the method described in claim 1, it is characterized in that, the base station is often covers the first pilot signal using first wave Beam figuration vector is weighted, and is weighted often to cover the second pilot signal using the second wave beam forming vector, including：

3. a kind of channel information feedback method, which is characterized in that including：

User equipment detects at least a set of the first pilot signal weighted using the first wave beam forming vector and at least two sets make The second pilot signal weighted with the second wave beam forming vector, the second wave used by being weighted to the second pilot signal of every set Beam figuration vector is different, and the port number of first pilot signal is the antenna port number of base station, often covers the second pilot tone letter Number port number be less than the antenna port number of the base station but not less than 1；

The user equipment often covers the corresponding channel information of the first pilot signal to the base station feedback；

Wherein, before the user equipment often covers the corresponding channel information of the first pilot signal to the base station feedback, this method It further includes：

The user equipment is according to the second pilot signal channel gain of corresponding instruction of the second pilot signal of channel gain maximum Information and instruction often cover the information of the first pilot signal channel gain, determine often to cover the corresponding wave beam of the first pilot signal respectively Figuration gain；

The user equipment, which uses, often covers the corresponding beam forming gain of the first pilot signal respectively to the first pilot signal of every set Channel estimation value be adjusted, determine often to cover the corresponding channel status of the first pilot signal using the channel estimation value after adjustment Information, the channel state information include the pre-coding matrix instruction after compensation, the order instruction after compensation and the channel after compensation Quality indicates；

This method further includes：The user equipment is to the mark of the second pilot signal of base station feedback channel gain maximum.

4. according to the method described in claim 3, it is characterized in that, the user equipment often covers first to the base station feedback leads The corresponding channel information of frequency signal, including：

The user equipment is according to the second pilot signal channel gain of corresponding instruction of the second pilot signal of channel gain maximum Information and often cover the first pilot signal it is corresponding instruction the first pilot signal channel gain information, respectively determine often cover first The corresponding beam forming gain of pilot signal；

The user equipment, which uses, often covers letter of the corresponding beam forming gain of the first pilot signal to the first pilot signal of every set Road estimated value is adjusted, and is determined often to cover the order after the corresponding compensation of the first pilot signal using the channel estimation value after adjustment and is referred to Channel quality instruction after showing and compensating；

The user equipment often covers the corresponding channel state information of the first pilot signal, the channel status to the base station feedback Information includes the order instruction after uncompensated pre-coding matrix instruction, compensation and the channel quality instruction after compensation；

5. according to the method described in claim 3, it is characterized in that, the user equipment often covers first to the base station feedback leads The corresponding channel information of frequency signal, including：

The user equipment often covers the corresponding channel state information of the first pilot signal, the channel status to the base station feedback Information includes uncompensated pre-coding matrix instruction, uncompensated order instruction and the instruction of uncompensated channel quality；

This method further includes：The user equipment indicates the second pilot signal channel gain to the base station feedback at least two Information, each information for indicating the second pilot signal channel gain correspond to a set of second pilot signal.

6. according to the method described in claim 3, it is characterized in that, the user equipment often covers first to the base station feedback leads Before the corresponding channel information of frequency signal, this method further includes：

The user equipment often covers the second pilot signal channel gain of corresponding instruction of the second pilot signal according to what is received The information of the first pilot signal channel gain of information and instruction determines that often covering the corresponding wave beam forming of the second pilot signal increases respectively Benefit；

The user equipment, which uses, often covers the corresponding beam forming gain of the second pilot signal respectively to the first pilot signal of every set Channel estimation value be adjusted, and using often cover the channel estimation value after the corresponding adjustment of the second pilot signal determine respectively it is every Cover the corresponding channel state information of the first pilot signal, the channel state information include the pre-coding matrix instruction after compensation, Channel quality instruction after order instruction and compensation after compensation；

7. a kind of base station, which is characterized in that including：

Transfer resource determining module, for being at least a set of first pilot signal and at least two set of second pilot signal determines respectively Transfer resource, the port number of first pilot signal are the antenna port number of the base station, often cover the end of the second pilot signal Mouth number is less than the antenna port number of the base station but not less than 1；

Wave beam forming module, for being weighted often to cover the first pilot signal using the first wave beam forming vector, and often to cover Second pilot signal is weighted using the second wave beam forming vector, the used by being weighted to the second pilot signal of every set Two wave beam forming vectors are different；

Pilot signal sending module, for the second pilot signal often covered after the first pilot signal and often set weighting after weighting Respectively user equipment is sent on determining transfer resource；

The base station further includes downlink transfer parameter determination module；

The downlink transfer parameter determination module is used for：

Receive user equipment feedback the corresponding channel state information of the first pilot signal and channel gain it is maximum second The mark of pilot signal, the channel state information include the pre-coding matrix instruction after compensation, order instruction and benefit after compensation Channel quality instruction after repaying；

According to the mark of the second pilot signal, corresponding second pilot signal, and the second pilot signal pair that will be found are searched The wave beam forming vector answered is determined as the wave beam forming vector of the user equipment；

Referred to according to the pre-coding matrix after the wave beam forming of user equipment vector and the corresponding compensation of the first pilot signal Order instruction after showing and compensating determines the pre-coding matrix of the user equipment；And according to the corresponding compensation of the first pilot signal Channel quality instruction afterwards determines the down channel quality of the user equipment；

Or

The downlink transfer parameter determination module is used for：

Receive user equipment feedback the corresponding channel state information of the first pilot signal and channel gain it is maximum second The mark of pilot signal, the channel state information include the order instruction and benefit after uncompensated pre-coding matrix instruction, compensation Channel quality instruction after repaying；

According to the corresponding wave beam forming vector of the second pilot signal found to the uncompensated pre-coding matrix instruction into Row compensation；

Or

The downlink transfer parameter determination module is used for：

The corresponding channel state information of the first pilot signal and at least two instructions second for receiving the user equipment feedback are led The information of frequency signaling channel gain, each information for indicating the second pilot signal channel gain correspond to a set of second pilot signal, The channel state information refers to including uncompensated pre-coding matrix instruction, uncompensated order instruction and uncompensated channel quality Show；

According to the information of described at least two the second pilot signal channel gains of instruction, the second pilot tone of channel gain maximum is determined Signal, and the corresponding wave beam forming vector of the second pilot signal of channel gain maximum is determined as the user equipment Wave beam forming vector；

It is right using the information of the second pilot signal of channel gain maximum the second pilot signal channel gain of corresponding instruction The corresponding order instruction of first pilot signal and channel quality instruction compensate；And second using channel gain maximum is led The corresponding wave beam forming vector of frequency signal uncompensated pre-coding matrix instruction corresponding to the first pilot signal compensates；

Or

The downlink transfer parameter determination module is used for：

Receive the corresponding at least two groups of channel state informations of the first pilot signal of the user equipment feedback, the channel status Information includes the pre-coding matrix instruction after compensation, the order instruction after compensation and the channel quality instruction after compensation；

Determine corresponding second pilot signal of the channel state information after one group of compensation, and second pilot signal is corresponding Wave beam forming vector is determined as the wave beam forming vector of the user equipment；

Referred to according to the pre-coding matrix after being compensated in the wave beam forming of user equipment vector and one group of channel state information Order instruction after showing and compensating determines the pre-coding matrix of the user equipment；And it is compensated according in one group of channel state information Channel quality instruction afterwards determines the down channel quality of the user equipment.

8. base station according to claim 7, which is characterized in that the wave beam forming vector is used for：

It is weighted for the first pilot signal of every set using the first vertical dimension wave beam forming vector, and often to cover the second pilot signal It is weighted using the second vertical dimension wave beam forming vector.

9. a kind of user equipment, which is characterized in that including：

Pilot signal detection module, for detecting that at least a set of the first pilot tone weighted using the first wave beam forming vector is believed Number and at least two sets using the second wave beam forming vector weight the second pilot signals, to it is every set the second pilot signal add The second wave beam forming vector is different used by power, and the port number of first pilot signal is the antenna port of base station Number, the port number for often covering the second pilot signal are less than the antenna port number of the base station but not less than 1；

Feedback of channel information module, for often covering the corresponding channel information of the first pilot signal to the base station feedback；

Wherein, the feedback of channel information module is specifically used for：

According to the information of the second pilot signal of channel gain maximum the second pilot signal channel gain of corresponding instruction and instruction The information of the first pilot signal channel gain is often covered, determines often to cover the corresponding beam forming gain of the first pilot signal respectively；

Using often cover the corresponding beam forming gain of the first pilot signal respectively to it is every set the first pilot signal channel estimation value It is adjusted, the corresponding channel state information of the first pilot signal, the channel shape is determined using the channel estimation value after adjustment State information includes the pre-coding matrix instruction after compensation, the order instruction after compensation and the channel quality instruction after compensation；

The second pilot tone of the corresponding channel state information of the first pilot signal and channel gain maximum is often covered to the base station feedback The mark of signal.

10. user equipment according to claim 9, which is characterized in that the feedback of channel information module is specifically used for：

It covers according to the information of the second pilot signal of channel gain maximum the second pilot signal channel gain of corresponding instruction and often The information of first pilot signal the first pilot signal channel gain of corresponding instruction determines often to cover the first pilot signal correspondence respectively Beam forming gain；

The channel estimation value of the first pilot signal of every set is carried out using the corresponding beam forming gain of the first pilot signal is often covered Adjustment, after determining often to cover order instruction and the compensation after the corresponding compensation of the first pilot signal using the channel estimation value after adjustment Channel quality indicates；

The second pilot tone of the corresponding channel state information of the first pilot signal and channel gain maximum is often covered to the base station feedback The mark of signal, after the channel state information includes order instruction and compensation after uncompensated pre-coding matrix instruction, compensation Channel quality instruction.

11. user equipment according to claim 9, which is characterized in that the feedback of channel information module is specifically used for：

The corresponding channel state information of the first pilot signal and at least two instruction the second pilot tone letters are often covered to the base station feedback The information of number channel gain, each information for indicating the second pilot signal channel gain corresponds to a set of second pilot signal, described Channel state information includes uncompensated pre-coding matrix instruction, uncompensated order instruction and the instruction of uncompensated channel quality.

12. user equipment according to claim 9, which is characterized in that the feedback of channel information module is specifically used for：

The information of the second pilot signal the second pilot signal channel gain of corresponding instruction and instruction the are often covered according to what is received The information of one pilot signal channel gain determines often to cover the corresponding beam forming gain of the second pilot signal respectively；

The channel estimation value of the first pilot signal is carried out respectively using the corresponding beam forming gain of the second pilot signal is often covered Adjustment, and the channel estimation value after often covering the corresponding adjustment of the second pilot signal is utilized to determine often to cover the first pilot signal pair respectively The channel state information answered, the channel state information include compensation after pre-coding matrix instruction, compensation after order instruction and Channel quality instruction after compensation；