CN102377463A - Pairing method in multiuser multiple input and multiple output system and apparatus thereof, data transmission method and apparatus thereof - Google Patents

Abstract

The invention provides a pairing method in a multiuser multiple input and multiple output (MIMO) system. The method comprises the following steps that: current scheduling users are selected and carrier wave signal to interference pulse noise ratios of the users are obtained; non-edge users in the current scheduling users are determined; and according to the carrier wave signal to interference pulse noise ratios, pairing is carried out on non-edge users; and among each set of the paired users, carrier wave signal to interference pulse noise ratios of all contained users are different. In addition, the invention also provides a pairing apparatus in a multiuser MIMO system. According to the invention, according to a carrier wave signal to interference pulse noise ratio, pairing is carried out with simple operation; and moreover, multiuser diversity gains can be effectively obtained.

Description

Matching method in the multi-user MIMO system, data transmission method and device

Technical field

The present invention relates to multiple-input and multiple-output (MIMO, Multiple Input and Multiple 0utput) mobile radio system, relate in particular to a kind of uplink multiuser equipment (UE, UserEquipment) matching method of virtual MIMO of being applied to.

Background technology

The MIMO technology can obviously improve power system capacity because of it and spectrum efficiency has obtained extensive concern, is one of key technology of next generation mobile communication, yet mimo system requires many antennas of deployment, thereby has caused high complexity and expensive.In cellular environment, subscriber equipment generally receives the restriction of aspects such as high complexity, volume, power consumption and cost, is difficult to equip a plurality of antennas.Therefore, at the initial stage of 3G and B3G/4G mobile communication, most of subscriber equipment will still use single antenna.Even arrived the 4G stage, because to the littler gentlier generally expectation and the demand of equipment, the antenna amount of user side will be restricted, the advantage of therefore traditional MIMO technology is difficult in uplink, brought into play fully.Virtual MIMO (virtual MIMO is called for short V-MIMO) technology can solve above bottleneck, and it allows two or more to have only the user of single transmit antenna on same Resource Block, to transmit data.So, transmitting terminal can equivalence be regarded many antennas as.User pairing is an important and unique link in the V-MIMO system, and promptly two or more single antenna users of base station selection form the V-MIMO transmission.Because signal is from different users; Through different channels, the degree of phase mutual interference is different between the user, therefore; Have only through effective user pairing process; Could obtain the multi-user diversity gain of V-MIMO system better, and make the phase mutual interference between the pairing user minimum, the reliability and the robustness of transmission of radio links after the assurance cooperation.The research about the user pairing algorithm of announcing both at home and abroad at present is limited.In existing document or the patent, the user pairing criterion is based on random user pairing and quadrature pairing.The quadrature pairing selects the maximum user of two channel orthogonalities to match; The pairing that this method can reduce between the user is disturbed; When keeping radio link robustness, improve throughput of system, but because search orthogonal users amount of calculation is big, so complexity is too big.Random pair then at random two users that choose matches, and realizes relatively easily, but can't obtain multi-user diversity gain, can not make throughput-maximized.

Summary of the invention

The technical problem that the present invention will solve provides a kind of matching method, data transmission method and device in multi-user MIMO system, realizes simply, and can effectively obtain multi-user diversity gain.

In order to address the above problem, the invention provides the matching method in a kind of multi-user MIMO system, comprising:

Select the user of current scheduling, obtain user's carrier wave Signal to Interference plus Noise Ratio;

Confirm the non-edge customer among the user of said current scheduling;

According to said carrier wave Signal to Interference plus Noise Ratio said non-edge customer is matched, wherein, every assembly is different to each user's of comprising among the user carrier wave Signal to Interference plus Noise Ratio.

Further, said method also can have following characteristics, according to the carrier wave Signal to Interference plus Noise Ratio said non-edge customer is matched to comprise:

From said non-edge customer to be paired, select a user as 1st user of an assembly to the user; The user who from remaining non-edge customer, selects with this assembly each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed by more than preset first threshold is as k the user of this assembly to the user; The rest may be inferred, up to confirming this assembly all users to the user; K=2..m, the number of users that m comprises the user for this assembly;

The rest may be inferred, up to said non-edge customer pairing is finished.

Further; Said method also can have following characteristics; When selecting said k user; If exist when each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio being differed by more than a plurality of user of preset first threshold, select with this assembly the minimum user of each subscriber channel correlation of having selected among the user as k the user of this assembly to the user with this assembly; If do not exist user and this assembly that each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio is differed by more than preset first threshold, then select each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed maximum user as k the user of this assembly to the user with this assembly.

Further; Said method also can have following characteristics, selects an assembly to first user among the user as follows: from said non-edge customer to be paired, to select a user as an assembly first user to the user based on the equitable proportion criterion.

The present invention also provides a kind of data transmission method, after according to the method for the invention non-edge customer being matched, also comprises:

Obtain pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards;

Carrier wave Signal to Interference plus Noise Ratio according to user after the pairing is that every assembly is to user resource allocation piece resource and modulating-coding mechanism;

Every assembly is sent information to be passed to the user on identical Resource Block resource;

The base station uses successive interference cancellation techniques to receive the information that every assembly is sent the user.

Further, said method also can have following characteristics, obtains pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^HH+R _n) ^-1H ^H, H and R _nRepresent channel matrix and noise variance matrix respectively, σ ²Be noise variance, i, j are user index, i=1...m, j=1...m, CINR _iRepresent an assembly to i user pairing carrier wave Signal to Interference plus Noise Ratio afterwards among the user, m is the number of users that this assembly comprises the user.

The present invention also provides the contrast means in a kind of multi-user MIMO system, comprising: carrier wave Signal to Interference plus Noise Ratio acquisition module, non-edge customer determination module and matching module, wherein:

Said carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: select the user of current scheduling, obtain said user's carrier wave Signal to Interference plus Noise Ratio;

Said non-edge customer determination module is used for: the non-edge customer of confirming the user of said current scheduling;

Said matching module is used for: according to said carrier wave Signal to Interference plus Noise Ratio said non-edge customer is matched, wherein, every assembly is different to each user's of comprising among the user carrier wave Signal to Interference plus Noise Ratio.

Further, said apparatus also can have following characteristics, and said matching module is to be used for:

From said non-edge customer to be paired, select a user as 1st user of an assembly to the user; The user who from remaining non-edge customer, selects with this assembly each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed by more than preset first threshold is as k the user of this assembly to the user; The rest may be inferred, up to confirming this assembly all users to the user; K=2..m, the number of users that m comprises the user for this assembly; The rest may be inferred, up to said non-edge customer pairing is finished.

Further, said apparatus also can have following characteristics, and said matching module is to be used for:

When selecting said k user; If exist when each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio being differed by more than a plurality of user of preset first threshold, select with this assembly the minimum user of each subscriber channel correlation of having selected among the user as k the user of this assembly to the user with this assembly; If do not exist user and this assembly that each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio is differed by more than preset first threshold, then select each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed maximum user as k the user of this assembly to the user with this assembly.

Further, said apparatus also can have following characteristics, and said matching module is to be used for: select a user as an assembly first user to the user based on the equitable proportion criterion from said non-edge customer to be paired.

The present invention also provides a kind of data transmission device, comprises contrast means of the present invention, the second carrier wave Signal to Interference plus Noise Ratio acquisition module, resource distribution module and data reception module, wherein:

The said second carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: obtain pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards;

Said resource distribution module is used for: the carrier wave Signal to Interference plus Noise Ratio according to user after the pairing is that every assembly is to user resource allocation piece resource and modulating-coding mechanism;

Data reception module is used for: use successive interference cancellation techniques to receive the information that every assembly is sent the user; Wherein, every assembly is sent information to be passed to the user on identical Resource Block resource.

Further, said apparatus also can have following characteristics, and the said second carrier wave Signal to Interference plus Noise Ratio acquisition module is to be used for obtaining as follows pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^HH+R _n) ^-1H ^H, H and R _nRepresent channel matrix and noise variance matrix respectively, σ ²Be the system noise variance, i, j are user index, i=1...m, j=1...m, CINR _iRepresent an assembly to i user pairing carrier wave Signal to Interference plus Noise Ratio afterwards among the user, m is the number of users that this assembly comprises the user.

The user that the present invention is different with Signal to Interference plus Noise Ratio matches, and receiver side adopts interference cancellation techniques to resolve the high user's of Signal to Interference plus Noise Ratio information earlier, then this user's information is eliminated as disturbing from receiving signal, obtains other users' information.Use matching method of the present invention; The user that user that Signal to Interference plus Noise Ratio is high (signal is strong) and Signal to Interference plus Noise Ratio are low (signal weak) matches, and the weak user of signal is less to the strong user's of signal interference, though the user of the strong user of signal a little less than to signal disturbs bigger; But utilize interference cancellation techniques earlier that signal is strong user profile to parse; Thereby think that interference is known, useful to the reception of weak signal, thus the throughput of raising whole system.The present invention realizes simply, and can effectively obtain multi-user diversity gain.

Description of drawings

Fig. 1 is the naive model example of up virtual MIMO system;

Fig. 2 is the schematic flow sheet of the method for the invention;

Fig. 3 throughput ratio that to be the present invention and prior art obtain at the EVA70 channel, wherein ordinate is represented the throughput that the sub-district is total, abscissa is represented the different index constantly measured.

Embodiment

The present invention provides the matching method in a kind of uplink multi-user multi-input and multi-output system, comprising:

Step S1 selects the user of current scheduling, obtains user's carrier wave Signal to Interference plus Noise Ratio;

Step S2 confirms the non-edge customer among the user of said current scheduling;

Step S3 matches to said non-edge customer according to said carrier wave Signal to Interference plus Noise Ratio, and wherein, every assembly is different to each user's of comprising among the user carrier wave Signal to Interference plus Noise Ratio.

Wherein, among the step S2, confirm non-edge customer according to following mode:

Confirm that the user arrives the path loss of each base station (Pass Loss; PL), the user is carried out ascending ordering to the PL of each base station, if the difference of minimum value and sub-minimum is in the thresholding of setting; Think that this user is edge customer, otherwise this user is non-edge customer.

Wherein, among the step S3, according to the carrier wave Signal to Interference plus Noise Ratio said non-edge customer is matched and to comprise:

From said non-edge customer to be paired, select a user as 1st user of an assembly to the user; The user who from remaining non-edge customer, selects with this assembly each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed by more than preset first threshold is as k the user of this assembly to the user; If exist when each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio being differed by more than a plurality of user of preset first threshold, select with this assembly the minimum user of each subscriber channel correlation of having selected among the user as k the user of this assembly to the user with this assembly; If do not exist user and this assembly that each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio is differed by more than preset first threshold, then select each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed maximum user as k the user of this assembly to the user with this assembly; The rest may be inferred, up to confirming this assembly all users to the user; K=2..m, m are the number of users that every assembly comprises the user;

The rest may be inferred, up to said non-edge customer pairing is finished.The m value can be 2, also can be for other are worth, and promptly every assembly can comprise the user more than 2 or 2 to the user.

Wherein, from said non-edge customer to be paired, select a user as an assembly first user, certainly, also can select first user,, select based on polling mode such as selecting at random based on other criterions to the user based on the equitable proportion criterion.

The present invention also provides a kind of data transmission method, after based on above-mentioned matching method non-edge customer being matched, also comprises

Step S4 obtains pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards;

Step S5, user's carrier wave Signal to Interference plus Noise Ratio is that every assembly is to user resource allocation piece resource and modulating-coding mechanism based on matching afterwards;

Step S6, every assembly is sent information to be passed to the user on identical Resource Block resource;

Step S7, the base station uses successive interference cancellation techniques to receive the information that every assembly is sent the user.

Wherein, among the step S4, obtain pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^HH+R _n) ^-1H ^H, H and R _nRepresent channel matrix and noise variance matrix respectively, σ ²Be noise variance, i, j are user index, i=1...m, j=1...m, CINR _iRepresent an assembly to i user pairing carrier wave Signal to Interference plus Noise Ratio afterwards among the user, m is the number of users that this assembly comprises the user.H ^HThe conjugation of representing matrix H is changeed order.

Be that example further specifies the present invention with two user pairing below.

The present invention provides a kind of uplink multi-users MIMO data transmission method, comprises step:

Step 1: this user who dispatches is constantly selected according to dispatching criterion in the base station, obtains this user's carrier wave Signal to Interference plus Noise Ratio (CINR) and the path loss that this user arrives each base station;

Step 2: the base station confirms according to the PL value of this user to each base station whether this user is edge customer; If this user is an edge customer, handle according to existing flow process, otherwise execution in step 3;

Step 3: make up the difference of non-edge customer according to the carrier wave Signal to Interference plus Noise Ratio base station, and the virtual MIMO user that partners does not match to edge customer;

Step 4:, calculate pairing user's CINR afterwards respectively for different pairing users;

Because step 3 couple user matches, exist between the pairing user and disturb, and the CINR that obtains in the step 1 is based on that the non-matching user obtains, therefore need recomputate user's after the pairing CINR;

Step 5: the base station is that every couple of pairing user distributes suitable R B (Resource Block, Resource Block) resource and MCS (Modulation and Coding Scheme, modulating-coding mechanism) configuration according to the CINR that calculates after the pairing, and is handed down to UE;

Step 6: the pairing user sends information to be passed on identical RB resource;

Step 7: serial interference elimination is used in the base station, and (Successive Interference Cancellation, SIC) technology receives the information that the pairing user sends.

When carrying out the pairing of different user in the above-mentioned steps 3, the user of two different signal to noise ratios is partnered, avoid the identical user pairing of signal to noise ratio and make forming strong jamming between two users; At first choose first user, obtain this user's CINR according to the equitable proportion criterion; Next from remaining users, is chosen and this user's CINR differs the user more than the delta_cinr (predefined threshold value), preferably high than this user's CINR user; If there are a plurality of users all to meet the demands, the then preferential selection and first user's the little user of channel relevancy; If there is not the user to meet the demands, then choose and this user CINR differs maximum user.

In the above-mentioned steps 5, the code modulation mode MCS when choosing the user and send according to the corresponding relation of CINR and BLER (Block Error Rate); According to pairing user's the resource requirement and the remaining bandwidth of current time, for the pairing user distributes suitable R B resource;

In the above-mentioned steps 7, owing to use the interference eliminated demodulation method, the preferential strong signal of restituted signal power uses the matching method in the step 3, distinguishes strong signal easily, therefore effectively improves the demodulation performance of strong signal; On the basis of the strong signal of right demodulation, strong signal to be fallen as interference eliminated, the demodulation reliability of weak signal also is improved.

Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is explained in more detail.

A naive model example of up V-MIMO system is as shown in Figure 1.Suppose the scene of no area interference or single sub-district, have 6 users in the sub-district, suppose wherein to have two users is edge customer, and the user's number that can match of base station has only 4 so.Suppose that each user has only a transmitting antenna, and base station side 2 reception antennas have been installed.Base station dispatcher is selected 2 users to form V-MIMO and on identical running time-frequency resource, is transmitted data, can regard up 2 transmitting antennas that have like this as.

As shown in Figure 2, the practical implementation step of the inventive method is following:

Step 101: combine Fig. 1, base station measurement obtains the CINR of user 1 to user 6, supposes to be respectively SINR1, SINR2, SINR3, SINR4, SINR5; SINR6, and 6 users' PL, suppose to be respectively (PL11, PL12 ... .PL1n), (PL21, PL22; ... .PL2n), (PL31, PL32 ... .PL3n), (PL41, PL42 ... .PL4n); (PL51, PL52 ... .PL5n), (PL61, PL62 ... .PL6n), wherein n is the base station number in the network.

Step 102: to user 1 PL value according to ascending rank order obtain (PL11 ', PL12 ' ... .PL1n '), difference the dPL=PL11 '-PL12 ' of minimum path loss and time little path loss; Whether judge dPL less than threshold value, if less than, judge that then this user is edge customer, otherwise this user is non-edge customer.Threshold value can be taken as 5.Judge in this way successively for other users.Suppose that user 5 and user 6 are edge customer, other users are non-edge customer.User 5 and user 6 handle according to existing procedure.

Step 103: the base station is that 4 non-edge customers carry out user pairing; According to the equitable proportion criterion; Preferentially choose user 1, selection and user's 1 the user of CINR difference on delta_cinr (the predefined threshold value according to simulation result) is assumed to be user 2 in 3 users of residue; If there are a plurality of users to satisfy, choose so and the minimum user of 1 channel relevancy of user.

The equitable proportion criterion is for choosing the pairing UE of f maximum in the following formula in the said step 103:

$f=\underset{k\∈\{\mathrm{1,2},...,K\}}{\arg \max }\left(\frac{R_k\left(t\right)}{{\stackrel{\‾}{R}}_k\left(t\right)}\right)$

R (t)=log wherein ₂(1+ γ (t)), γ (t) expression t CINR constantly, wherein K representes can be used for total user's number of user pairing.R _k(t) the expection throughput of expression t moment user k,

Average throughput for user k.

Step 104: calculate pairing user's CINR, computing formula is following:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^HH+R _n) ^-1H ^H, H and R _nRepresent channel matrix and noise variance matrix respectively, σ ²Be the system noise variance, i, j represent to match user index number, m=2 in the present embodiment, and i, the j value is 1 and 2.

Step 105: according to pairing user's CINR value, for the pairing user chooses suitable MCS.Wherein the mapping relations of CINR and MCS are as shown in table 1:

Table 1

MCS(i)	CINR
		0	CINR＜CINR_MCS0
1	CINR_MCS0＝＜CINR＜CINR_MCS1
		2	CINR_MCS1＝＜CINR＜CINR_MCS2
3	CINR_MCS2＝＜CINR＜CINR_MCS3
		4	CINR_MCS3＝＜CINR＜CINR_MCS4
5	CINR_MCS4＝＜CINR＜CINR_MCS5
		6	CINR_MCS5＝＜CINR＜CINR_MCS6
7	CINR_MCS6＝＜CINR＜CINR_MCS7
		8	CINR_MCS7＝＜CINR＜CINR_MCS8
9	CINR_MCS8＝＜CINR＜CINR_MCS9
		10	CINR_MCS9＝＜CINR＜CINR_MCS10
11	CINR_MCS10＝＜CINR＜CINR_MCS11
		12	CINR_MCS11＝＜CINR＜CINR_MCS12
13	CINR_MCS12＝＜CINR＜CINR_MCS13
		14	CINR_MCS13＝＜CINR＜CINR_MCS14
15	CINR_MCS14＝＜CINR＜CINR_MCS15
		16	CINR_MCS15＝＜CINR＜CINR_MCS16
17	CINR_MCS16＝＜CINR＜CINR_MCS17
		18	CINR_MCS17＝＜CINR＜CINR_MCS18
19	CINR_MCS18＝＜CINR＜CINR_MCS19
		20	CINR_MCS19＝＜CINR＜CINR_MCS20
21	CINR_MCS20＝＜CINR＜CINR_MCS21
		22	CINR_MCS21＝＜CINR＜CINR_MCS22
23	CINR_MCS22＝＜CINR＜CINR_MCS23
		24	CINR_MCS23＝＜CINR＜CINR_MCS24
25	CINR_MCS24＝＜CINR＜CINR_MCS25
		26	CINR_MCS25＝＜CINR＜CINR_MCS26
27	CINR_MCS26＝＜CINR＜CINR_MCS27
		28	CINR_MCS27＝＜CINR

I=0,1 ..., the 28th, (Additive White Gaussian Noise, AWGN) on the BLER curve under 28 MCS of channel, BLER is 10% CINR value to the additive white Gaussian noise that emulation obtains.

When the RB number is chosen; Obtain the RB number that needs the more user's needs of RB among the pairing user, and compare, choose the RB number that the smaller value in the two needs as the pairing user with remaining bandwidth; Need 10 RB such as a user; A user needs 8 RB, and then selection needs the more user's of RB number RB number, selects 10 RB; And if remaining bandwidth is 11, then finally selecting the RB number is 10; If remaining bandwidth is 9, then finally selecting the RB number is 9.

Step 106: MCS and RB number that the user distributes according to base station dispatcher, on identical running time-frequency resource, send information to be passed;

Step 107: the base station uses the serial interference elimination receiver to receive two user's data of pairing.

Further; The serial interference receiver can use MMSE-SIC (MinimumMean-Squared Error Successive Interference Cancellation; The least mean-square error serial interference elimination) or ZF-SIC (Zero Forcing Successive Interference Cancellation, compel zero serial interference elimination) receiver; The serial interference elimination receiver at first calculates two users' signal to noise ratio; The user that signal to noise ratio is high detects earlier; The signal that detects this user quantizes the original symbol that obtains launching, and with this signal as interference eliminated, obtain the low user's of signal to noise ratio emission information.

Use above-mentioned identical method for remaining other users.

The specific embodiment of the invention is example with two users, and for the pairing greater than two users, the present invention is suitable for too.

The present invention also provides the contrast means in a kind of multi-user MIMO system, comprising: carrier wave Signal to Interference plus Noise Ratio acquisition module, non-edge customer determination module and matching module, wherein:

Said carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: select the user of current scheduling, obtain said user's carrier wave Signal to Interference plus Noise Ratio;

Said non-edge customer determination module is used for: the non-edge customer of confirming the user of said current scheduling;

Said matching module is used for: according to said carrier wave Signal to Interference plus Noise Ratio said non-edge customer is matched, wherein, every assembly is different to each user's of comprising among the user carrier wave Signal to Interference plus Noise Ratio.

Wherein, said matching module is to be used for:

From said non-edge customer to be paired, select a user as 1st user of an assembly to the user; The user who from remaining non-edge customer, selects with this assembly each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed by more than preset first threshold is as k the user of this assembly to the user; The rest may be inferred, up to confirming this assembly all users to the user; K=2..m, m are the number of users that every assembly comprises the user; The rest may be inferred, up to said non-edge customer pairing is finished.

Wherein, said matching module is to be used for:

When selecting said k user; If exist when each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio being differed by more than a plurality of user of preset first threshold, select with this assembly the minimum user of each subscriber channel correlation of having selected among the user as k the user of this assembly to the user with this assembly; If do not exist user and this assembly that each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio is differed by more than preset first threshold, then select each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed maximum user as k the user of this assembly to the user with this assembly.

Wherein, said matching module is to be used for: select a user as an assembly first user to the user based on the equitable proportion criterion from said non-edge customer to be paired.

The present invention also provides a kind of data transmission device, comprises above-mentioned contrast means, the second carrier wave Signal to Interference plus Noise Ratio acquisition module, resource distribution module and data reception module, wherein:

The said second carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: obtain pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards;

Said resource distribution module is used for: the carrier wave Signal to Interference plus Noise Ratio according to user after the pairing is that every assembly is to user resource allocation piece resource and modulating-coding mechanism;

Data reception module is used for: use successive interference cancellation techniques to receive the information that every assembly is sent the user; Wherein, every assembly is sent information to be passed to the user on identical Resource Block resource.

Wherein, the said second carrier wave Signal to Interference plus Noise Ratio acquisition module is to be used for obtaining as follows pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^HH+R _n) ^-1H ^H, H and Rn representes channel matrix and noise variance matrix, σ respectively ²Be the system noise variance, i, j are user index, i=1...m, j=1...m, CINR _iRepresent an assembly to i user pairing carrier wave Signal to Interference plus Noise Ratio afterwards among the user, m is the number of users that this assembly comprises the user.

Should be understood that above-mentioned description to preferred embodiment of the present invention is comparatively concrete, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with accompanying claims.

Claims (12)

1. the matching method in the multi-user MIMO system is characterized in that, comprising:

Select the user of current scheduling, obtain user's carrier wave Signal to Interference plus Noise Ratio;

Confirm the non-edge customer among the user of said current scheduling;

According to said carrier wave Signal to Interference plus Noise Ratio said non-edge customer is matched, wherein, every assembly is different to each user's of comprising among the user carrier wave Signal to Interference plus Noise Ratio.

2. the method for claim 1 is characterized in that, according to the carrier wave Signal to Interference plus Noise Ratio said non-edge customer is matched to comprise:

From said non-edge customer to be paired, select a user as 1st user of an assembly to the user; The user who from remaining non-edge customer, selects with this assembly each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed by more than preset first threshold is as k the user of this assembly to the user; The rest may be inferred, up to confirming this assembly all users to the user; K=2..m, the number of users that m comprises the user for this assembly;

The rest may be inferred, up to said non-edge customer pairing is finished.

3. method as claimed in claim 2; It is characterized in that; When selecting said k user; If exist when each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio being differed by more than a plurality of user of preset first threshold, select with this assembly the minimum user of each subscriber channel correlation of having selected among the user as k the user of this assembly to the user with this assembly; If do not exist user and this assembly that each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio is differed by more than preset first threshold, then select each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed maximum user as k the user of this assembly to the user with this assembly.

4. method as claimed in claim 2; It is characterized in that, select an assembly to first user among the user as follows: from said non-edge customer to be paired, to select a user as an assembly first user the user based on the equitable proportion criterion.

5. a data transmission method is characterized in that, after based on the arbitrary said method of claim 1 to 4 non-edge customer being matched, also comprises:

Obtain pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards;

Carrier wave Signal to Interference plus Noise Ratio according to user after the pairing is that every assembly is to user resource allocation piece resource and modulating-coding mechanism;

Every assembly is sent information to be passed to the user on identical Resource Block resource;

The base station uses successive interference cancellation techniques to receive the information that every assembly is sent the user.

6. method as claimed in claim 5 is characterized in that, obtains pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^HH+R _n) ^-1H ^H, H and R _nRepresent channel matrix and noise variance matrix respectively, σ ²Be noise variance, i, j are user index, i=1...m, j=1...m, CINR _iRepresent an assembly to i user pairing carrier wave Signal to Interference plus Noise Ratio afterwards among the user, m is the number of users that this assembly comprises the user.

7. the contrast means in the multi-user MIMO system is characterized in that, comprising: carrier wave Signal to Interference plus Noise Ratio acquisition module, non-edge customer determination module and matching module, wherein:

Said carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: select the user of current scheduling, obtain said user's carrier wave Signal to Interference plus Noise Ratio;

Said non-edge customer determination module is used for: the non-edge customer of confirming the user of said current scheduling;

Said matching module is used for: according to said carrier wave Signal to Interference plus Noise Ratio said non-edge customer is matched, wherein, every assembly is different to each user's of comprising among the user carrier wave Signal to Interference plus Noise Ratio.

8. device as claimed in claim 7 is characterized in that,

Said matching module is to be used for:

From said non-edge customer to be paired, select a user as 1st user of an assembly to the user; The user who from remaining non-edge customer, selects with this assembly each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed by more than preset first threshold is as k the user of this assembly to the user; The rest may be inferred, up to confirming this assembly all users to the user; K=2..m, the number of users that m comprises the user for this assembly; The rest may be inferred, up to said non-edge customer pairing is finished.

9. device as claimed in claim 8 is characterized in that, said matching module is to be used for:

When selecting said k user; If exist when each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio being differed by more than a plurality of user of preset first threshold, select with this assembly the minimum user of each subscriber channel correlation of having selected among the user as k the user of this assembly to the user with this assembly; If do not exist user and this assembly that each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio is differed by more than preset first threshold, then select each user's of having selected among the user carrier wave Signal to Interference plus Noise Ratio to be differed maximum user as k the user of this assembly to the user with this assembly.

10. device as claimed in claim 8 is characterized in that, said matching module is to be used for: select a user as an assembly first user to the user based on the equitable proportion criterion from said non-edge customer to be paired.

11. a data transmission device is characterized in that: comprise like the arbitrary described contrast means of claim 7 to 10, the second carrier wave Signal to Interference plus Noise Ratio acquisition module, resource distribution module and data reception module, wherein:

The said second carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: obtain pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards;

Said resource distribution module is used for: the carrier wave Signal to Interference plus Noise Ratio according to user after the pairing is that every assembly is to user resource allocation piece resource and modulating-coding mechanism;

Data reception module is used for: use successive interference cancellation techniques to receive the information that every assembly is sent the user; Wherein, every assembly is sent information to be passed to the user on identical Resource Block resource.

12. device as claimed in claim 11 is characterized in that, the said second carrier wave Signal to Interference plus Noise Ratio acquisition module is to be used for obtaining as follows pairing user's carrier wave Signal to Interference plus Noise Ratio afterwards:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^HH+R _n) ^-1H ^H, H and R _nRepresent channel matrix and noise variance matrix respectively, σ ²Be the system noise variance, i, j are user index, i=1...m, j=1...m, CINR _iRepresent an assembly to i user pairing carrier wave Signal to Interference plus Noise Ratio afterwards among the user, m is the number of users that this assembly comprises the user.

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