CN103532607A - Method of massive MIMO system for selecting base station antenna and user terminal - Google Patents

Abstract

A method of a massive MIMO (Multi-input Multi-output) system for selecting a base station antenna and a user terminal comprises the steps of: I, determining the following selection mode including a Class A stepped selection mode of selecting the user terminal and then the base station antenna, and a Class B combined selection mode of combined selection of the user terminal and the base station antenna, and II, selecting the user terminal according to a massive MIMO system throughput maximization criterion or a channel relevance degree minimization criterion, and selecting the base station antenna according to the system throughput maximization criterion by using instantaneous channel state information or statistic channel state information acquired by a base station according to the selection mode. The method effectively reduces the complexity and cost of realizing the massive MIMO system, optimizes system performances and increases the system throughput.

Description

Selection antenna for base station and the user terminal method of extensive mimo system

Technical field

The selection antenna for base station and the user terminal method that the present invention relates to extensive mimo system, belong to extensive mimo system field.

Background technology

Extensive MIMO(Very Large MIMO or Massive MIMO, MIMO refers to that multiple-input and multiple-output (Multi-input Multi-output) is a kind of model that is used for describing multi-aerial radio communication system, a plurality of antennas that can utilize transmitting terminal are independent transmitted signal separately, simultaneously at receiving terminal with a plurality of antenna receptions and recover prime information) with its distinctive advantage: the channel capacity of the higher multiple of acquisition, lower energy consumption, space region calibration very accurately, relatively inexpensive hardware realizations etc., have obtained the suitable concern of wireless communication field.The base station end of extensive mimo system disposes the antenna of a large amount of numbers, such as 64, or 128, when all antennas all participate in transfer of data, need to the same number of radio frequency link of antenna for base station, simultaneously in extensive mimo system, along with the increase of base station end number of antennas, the correlation of different user interchannel sharply increases along with the increase of number of users, causes the implementation complexity of system and cost more much higher than common mimo system.In order reducing costs with complexity, to obtain more excellent systematic function simultaneously, to tend to, by selecting antenna for base station to realize, select suitable antenna for base station subset to participate in transmission, closed portion antenna.

In the extensive mimo system of reality, base station is difficult to obtain accurate instantaneous channel condition information, and the statistical property of channel changes slowly with respect to instantaneous channel condition information, can think that base station can obtain comparatively accurate statistical channel state information relatively easily.Based on background as above, utilize channel condition information to select antenna for base station and user terminal to become a kind of possibility.

Summary of the invention

Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of selection antenna for base station and user method of extensive mimo system, instantaneous channel condition information or the statistical channel state information of utilizing base station to obtain, according to throughput of system maximization or channel relevancy, minimize criterion selection user terminal, according to throughput of system, maximize criterion and select antenna for base station, realized the method for utilizing channel condition information to select antenna for base station and user terminal, realized the method for utilizing channel condition information to select antenna for base station and user terminal, having solved extensive mimo system realizes complicated, the problem that cost is high.

For solving the problems of the technologies described above, the technical solution used in the present invention is: selection antenna for base station and the user terminal method of extensive mimo system, comprise the following steps:

Step 1, extensive mimo system is determined following preference pattern; Described preference pattern comprises: category-A, first carries out user terminal selecting, then carries out the substep preference pattern of antenna for base station selection; Category-B, user terminal selecting selects with antenna for base station the Combining Choice Model combining; Wherein category-A comprises: pattern A.1: first carry out user terminal selecting, then the substep preference pattern of carrying out antenna for base station selection progressively forms the preference pattern that number of antennas is successively decreased; A.2 pattern: first carry out user terminal selecting, then carry out the preference pattern that substep preference pattern progressively forms and number of antennas increases progressively of antenna for base station selection; Category-B comprises: pattern B.1, the preference pattern that user terminal selecting and antenna for base station select the Combining Choice Model that combines and number of antennas to successively decrease; B.2 pattern, the preference pattern that user terminal selecting and antenna for base station select the Combining Choice Model that combines and number of antennas to increase progressively;

Step 2, according to preference pattern, instantaneous channel condition information or the statistical channel state information of utilizing base station to obtain, according to extensive mimo system, throughput-maximized or channel relevancy degree minimizes criterion and selects user terminal, according to the throughput-maximized criterion of mimo system, selects antenna for base station; Described channel relevancy degree is by determining with following formula 1 and formula 2:

While utilizing instantaneous channel condition information, user terminal k and user terminal j to the degree of relevancy of the channel of base station are

${\mathrm{Corr}}^I\⟨k,j\⟩=\frac{\mathrm{tr}\left\{H_k{H}_j\right\}}{{\left|\right|H_k\left|\right|}_f{\left|\right|H_j\left|\right|}_f}$ Formula 1

While utilizing statistical channel state information, user terminal k and user terminal j to the degree of relevancy of the channel of base station are

${\mathrm{Corr}}^S\⟨k,j\⟩=\frac{\mathrm{tr}\left\{R_k{R}_j\right\}}{{\left|\right|R_k\left|\right|}_f{\left|\right|R_j\left|\right|}_f}$ Formula 2

Corr ⁱ< k, j > and Corr ^s< k, the numerical value of j > is less, and correlation is less; Wherein, H _krepresent that user terminal k is to the channel vector of base station,

represent that user terminal k is to the covariance matrix of BTS channel, k={1 ..., K},

this norm of not Luo Beini crow of representing matrix, tr{} representing matrix is asked mark computing, and K is positive integer;

When preference pattern is for A.1 time, antenna for base station is selected and user terminal selecting comprises the following steps:

(1) activate all antenna for base station, definition antenna for base station set be Ψ=1 ..., M}, wherein M is positive integer;

(2) in the situation that all antenna for base station all participate in transfer of data, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(3) close successively continuous α foundation station antenna;

(4) throughput of system of the antenna for base station subset S of the antenna for base station of computing activation state;

(5) repeat (3) and (4), travel through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum;

When preference pattern is for A.2 time, antenna for base station is selected and user terminal selecting comprises the following steps:

(1) activate all antenna for base station, in the situation that all antenna for base station all participate in transfer of data, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(2) close all antenna for base station;

(3) activate successively continuous α foundation station antenna;

(4) calculate the antenna for base station subset S of the antenna for base station of state of activation _mthroughput of system;

(5) repeat (3) and (4), travel through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _m;

When preference pattern is for B.1 time, antenna for base station is selected and user terminal selecting comprises the following steps:

(1) activate all antenna for base station;

(2) close successively continuous α foundation station antenna;

(3) at the antenna for base station subset S of the antenna for base station of state of activation _min definite situation, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(4) calculate antenna for base station subset S _mthroughput of system;

(5) repeat (3) and (4), travel through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _mand user terminal combination U ^opt;

When preference pattern is for B.2 time, antenna for base station is selected and user terminal selecting comprises the following steps:

(1) close all antenna for base station;

(2) activate successively continuous α foundation station antenna;

(3) at the antenna for base station subset S of the antenna for base station of state of activation _min definite situation, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(4) calculate antenna for base station subset S _mthroughput of system;

(5) repeat (3) and (4), travel through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _mand user terminal combination U ^opt; α is the positive integer within 1-5.

The process of the statistical channel state information that further, base station obtains is: after by user terminal, the instantaneous channel condition information in transmitting procedure being added up, feed back to base station or base station is added up the instantaneous information feedback value in transmitting procedure; Reduce feedback overhead, reduced the complexity of extensive mimo system.

When utilizing instantaneous channel information, need to constantly to channel status, feed back at each; Statistic channel information is that feedback overhead is less to feeding back after the Information Statistics of a transmission period.

The selection of four kinds of patterns is the computing abilities according to system base-station equipment, according to implementation complexity and the requirement to throughput performance, and selects different preference patterns.Every kind of pattern all can work alone, and when practical, certain base station is just suitable for corresponding certain work pattern.Certainly, do not get rid of base station yet and change certain pattern according to the situation of throughput or traffic carrying capacity, make the operating efficiency of system base-station higher.

Beneficial effect of the present invention: 1, the present invention utilizes instantaneous channel condition information or the statistical channel state information that base station obtains, according to throughput of system maximization or channel relevancy, minimize criterion selection user terminal, according to throughput of system, maximize criterion and select antenna for base station, realized the method for utilizing channel condition information to select antenna for base station and user terminal, effectively reduce complexity and cost that extensive mimo system is realized, optimize systematic function simultaneously, improved throughput of system; The process of the statistical channel state information that 2, base station of the present invention obtains, has reduced feedback overhead, has reduced the complexity of extensive mimo system.The flow process of four kinds of patterns of the present invention (algorithm) compared with prior art can both be brought certain selection gain, and its performance is all better than the situation that all antennas all participate in transmission.Wherein, combine the complexity of selection than the height of substep, performance is also better; The pattern that number of antennas is successively decreased (A.1, B.1) complexity ratio antenna number increase progressively (A.2, height B.2), performance is also better.So, in actual system, can, according to the disposal ability of base station and the requirement to systematic function, carry out model selection.

Accompanying drawing explanation

Fig. 1 is flow chart of the present invention.

The realization flow figure that Fig. 2 is preference pattern of the present invention for A.1 time.

The realization flow figure that Fig. 3 is preference pattern of the present invention for A.2 time.

The realization flow figure that Fig. 4 is preference pattern of the present invention for B.1 time.

The realization flow figure that Fig. 5 is preference pattern of the present invention for B.2 time.

Fig. 6 is the structure chart of the extensive mimo system in the present invention.

Embodiment

Below in conjunction with accompanying drawing, the present invention is further described.

Be illustrated in figure 1 flow chart of the present invention, selection antenna for base station and the user terminal method of extensive mimo system, comprise the following steps:

Step 1, selects different preference patterns; Described preference pattern comprises: category-A, first carries out user terminal selecting, then carries out the substep preference pattern of antenna for base station selection; Category-B, user terminal selecting selects with antenna for base station the Combining Choice Model combining; Wherein category-A comprises: class A.1, the preference pattern that number of antennas is successively decreased; A.2 the preference pattern that class number of antennas increases progressively; Category-B comprises: class B.1, the preference pattern that number of antennas is successively decreased; B.2 the preference pattern that class number of antennas increases progressively;

Step 2, according to preference pattern, instantaneous channel condition information or the statistical channel state information of utilizing base station to obtain, minimize criterion selection user terminal according to throughput of system maximization or channel relevancy, maximizes criterion select antenna for base station according to throughput of system; Described channel relevancy degree is determined by following (formula 1) and (formula 2)

While utilizing instantaneous channel condition information, user terminal k and user terminal j to the degree of relevancy of the channel of base station are

${\mathrm{Corr}}^I\&lang;k,j\&rang;=\frac{\mathrm{tr}\left\{H_k{H}_j\right\}}{{\left|\right|H_k\left|\right|}_f{\left|\right|H_j\left|\right|}_f}$ (formula 1)

While utilizing statistical channel state information, user terminal k and user terminal j to the degree of relevancy of the channel of base station are

${\mathrm{Corr}}^S\&lang;k,j\&rang;=\frac{\mathrm{tr}\left\{R_k{R}_j\right\}}{{\left|\right|R_k\left|\right|}_f{\left|\right|R_j\left|\right|}_f}$ (formula 2)

Corr ⁱ< k, j > and Corr ^s< k, the numerical value of j > is less, and correlation is less; Wherein, H _krepresent that user terminal k is to the channel vector of base station,

represent that user terminal k is to the covariance matrix of BTS channel, k={1 ..., K},

this norm of not Luo Beini crow of representing matrix, tr{} representing matrix is asked mark computing, and K is positive integer;

As shown in Figure 2: when preference pattern is for A.1 time, antenna for base station is selected and user terminal selecting comprises the following steps:

(1) activate all antenna for base station, definition antenna for base station set be Ψ=1 ..., M}, initialization antenna for base station subset is S, S=Ψ, definition indic={1 ..., M/ α }, index=0, count=0, wherein M is positive integer, the antenna for base station radical of α for closing in (3); α is the positive integer (lower same) between 1-5.The base station 1-5 root antenna that can simultaneously close.α generally gets 1-2.

(2) in the situation that all antenna for base station all participate in transfer of data, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(3) close successively continuous α foundation station antenna [(m-1) α+1:m α], wherein m is the index of traversal antenna for base station, m ∈ indic; ;

(4) the antenna for base station subset S of the antenna for base station of computing activation state _m=S the throughput of system of { [(m-1) α+1:m α] }, upgrade index=index ∪ m, indic=indic index, S=S S _m, count=count+1;

(5) repeat (3) and (4), until indic=Φ travels through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _m.

Can be in preference pattern for A.1 time by above step, optimum base station antenna subset and user side combination:

{S ^opt,U ^opt}=argmax{S _m,U ^opt}。

When preference pattern is for A.2 time, antenna for base station is selected and user terminal selecting comprises the following steps as shown in Figure 3:

(1) activate all antenna for base station, the set of definition antenna for base station is Ψ={ 1, M}, wherein M is positive integer, in the situation that all antenna for base station all participate in transfer of data, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, minimize criterion according to throughput of system maximization or channel relevancy, and selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(2) close all antenna for base station, initialization antenna for base station subset is S=Φ, definition indic={1 ..., M/ α }, index=0, count=0, α activates the radical of antenna for base station in (3);

(3) activate successively continuous α foundation station antenna [(m-1) α+1:m α], wherein m is the index of traversal antenna for base station, m ∈ indic;

(4) the antenna for base station subset S of the antenna for base station of computing activation state _m=S the throughput of system of { [(m-1) α+1:m α] }, upgrade index=index ∪ m, indic=indic index, S=S ∪ S _m, count=count+1;

(5) repeat (3) and (4), until indic=Φ travels through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _m.Can be in preference pattern for A.2 time by above step, optimum base station antenna subset and user side combination:

{S ^opt,U ^opt}=argmax{S _m,U ^opt}。

Can list of references: X.Gao, O.Edfors, F.Rusek, and F.Tufvesson, " Linear pre-coding performance in measured very-large MIMO channels; " in Proc.IEEE Vehicular Technology Conf. (VTC), San Francisco, CA, US, Sept.2011, pp.1-5.

There are channel relevancy and the quantitative analysis of handling up between user.

When preference pattern is for B.1 time, antenna for base station is selected and user terminal selecting comprises the following steps as shown in Figure 4:

(1) activate all antenna for base station, definition antenna for base station set be Ψ=1 ..., M}, initialization antenna for base station subset is S, S=Ψ, definition indic={1 ..., M/ α }, index=0, count=0, wherein M is positive integer, the antenna for base station radical of α for closing in (2);

(2) close successively continuous α foundation station antenna [(m-1) α+1:m α], wherein m is the index of traversal antenna for base station, wherein m ∈ indic;

(3) at the antenna for base station subset S of the antenna for base station of state of activation _m=S in { [(m-1) α+1:m α] } definite situation, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt

(4) calculate antenna for base station subset S _mthroughput of system, upgrade index=index ∪ m, indic=indic index, S=S S _m, count=count+1;

(5) repeat (3) and (4), until indic=Φ travels through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _mand user terminal combination U ^opt.

Can be in preference pattern for B.1 time by above step, optimum base station antenna subset and user side combination:

{S ^opt,U ^opt}=argmax{S _m,U ^opt}。

When preference pattern is for B.2 time, antenna for base station is selected and user terminal selecting comprises the following steps as shown in Figure 5:

(1) close the set of all antenna for base station definition antenna for base station be Ψ=1 ..., M}, initialization antenna for base station subset is S, S=Ψ, definition indic={1 ..., M/ α }, index=0, count=0, wherein M is positive integer, α is the antenna for base station radical activating in (2);

(2) activate successively continuous α foundation station antenna [(m-1) α+1:m α], wherein m is the index of traversal antenna for base station, wherein m ∈ indic;

(3) at the antenna for base station subset S of the antenna for base station of state of activation _m=S in { [(m-1) α+1:m α] } definite situation, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(4) calculate antenna for base station subset S _mthroughput of system, upgrade index=index ∪ m, indic=indic index, S=S ∪ S _m, count=count+1;

(5) repeat (3) and (4), until indic=Φ travels through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _mand user terminal combination U ^opt.

Can be in preference pattern for B.2 time by above step, optimum base station antenna subset and user side combination:

{S ^opt,U ^opt}=argmax{S _m,U ^opt}。

In the extensive mimo system of reality, base station is difficult to obtain accurate instantaneous channel condition information, and the statistical property of channel changes slowly with respect to instantaneous channel condition information, can think that base station can obtain comparatively accurate statistical channel state information relatively easily.The process of the statistical channel state information that in above-described method, base station obtains is: after by user terminal, the instantaneous channel condition information in transmitting procedure being added up, feed back to base station or base station is added up the instantaneous information feedback value in transmitting procedure, effectively reduce feedback overhead, reduced the complexity of extensive mimo system.

As shown in Figure 6: extensive mimo system comprises precoding module 101, N bar radio frequency link, radio frequency link handover module 102, M foundation station antenna, a K single antenna user terminal, user terminal selecting module 103 and base station end Antenna Selection Module 104.Instantaneous channel condition information or statistical channel state information that user terminal selecting module 103 utilizes base station to obtain, minimize criterion according to throughput of system maximization or channel relevancy, selects optimized user terminal; Instantaneous channel condition information or statistical channel state information that base station end Antenna Selection Module 104 utilizes base station to obtain, maximize criterion according to throughput of system and select optimum base station antenna; Radio frequency link handover module 102 is according to the result of base station end Antenna Selection Module 104, radio frequency link is switched to optimum base station antenna, the antenna for base station being connected with radio frequency link is in state of activation, participate in the transmission of data, all the other untapped antenna for base station, in closed condition, do not participate in the transmission of data.

The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (2)

1. selection antenna for base station and the user terminal method of extensive mimo system, is characterized in that: comprise the following steps:

Step 1, extensive mimo system is determined following preference pattern, described preference pattern comprises: category-A, first carries out user terminal selecting, then carries out the substep preference pattern of antenna for base station selection; Category-B, user terminal selecting selects with antenna for base station the Combining Choice Model combining; Wherein category-A comprises: pattern A.1: first carry out user terminal selecting, then the substep preference pattern of carrying out antenna for base station selection progressively forms the preference pattern that number of antennas is successively decreased; A.2 pattern: first carry out user terminal selecting, then carry out the preference pattern that substep preference pattern progressively forms and number of antennas increases progressively of antenna for base station selection; Category-B comprises: pattern B.1, the preference pattern that user terminal selecting and antenna for base station select the Combining Choice Model that combines and number of antennas to successively decrease; B.2 pattern, the preference pattern that user terminal selecting and antenna for base station select the Combining Choice Model that combines and number of antennas to increase progressively;

Step 2, according to preference pattern, instantaneous channel condition information or the statistical channel state information of utilizing base station to obtain, according to extensive mimo system, throughput-maximized or channel relevancy degree minimizes criterion and selects user terminal, according to the throughput-maximized criterion of mimo system, selects antenna for base station; Described channel relevancy degree is by determining with following formula 1 and formula 2:

While utilizing instantaneous channel condition information, user terminal k and user terminal j to the degree of relevancy of the channel of base station are

${\mathrm{Corr}}^I\&lang;k,j\&rang;=\frac{\mathrm{tr}\left\{H_k{H}_j\right\}}{{\left|\right|H_k\left|\right|}_f{\left|\right|H_j\left|\right|}_f}$ Formula 1

While utilizing statistical channel state information, user terminal k and user terminal j to the degree of relevancy of the channel of base station are

${\mathrm{Corr}}^S\&lang;k,j\&rang;=\frac{\mathrm{tr}\left\{R_k{R}_j\right\}}{{\left|\right|R_k\left|\right|}_f{\left|\right|R_j\left|\right|}_f}$ Formula 2

Corr ⁱ< k, j > and Corr ^s< k, the numerical value of j > is less, and correlation is less; Wherein, H _krepresent that user terminal k is to the channel vector of base station, represent that user terminal k is to the covariance matrix of BTS channel, k={1 ..., K},

this norm of not Luo Beini crow of representing matrix, tr{} representing matrix is asked mark computing, and K is positive integer;

When preference pattern is for A.1 time, antenna for base station is selected and user terminal selecting comprises the following steps:

(1) activate all antenna for base station, definition antenna for base station set be Ψ=1 ..., M}, wherein M is positive integer;

(2) in the situation that all antenna for base station all participate in transfer of data, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(3) close successively continuous α foundation station antenna;

(4) throughput of system of the antenna for base station subset S of the antenna for base station of computing activation state;

(5) repeat (3) and (4), travel through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum;

When preference pattern is for A.2 time, antenna for base station is selected and user terminal selecting comprises the following steps:

(1) activate all antenna for base station, in the situation that all antenna for base station all participate in transfer of data, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(2) close all antenna for base station;

(3) activate successively continuous α foundation station antenna;

(4) calculate the antenna for base station subset S of the antenna for base station of state of activation _mthroughput of system;

(5) repeat (3) and (4), travel through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _m;

When preference pattern is for B.1 time, antenna for base station is selected and user terminal selecting comprises the following steps:

(1) activate all antenna for base station;

(2) close successively continuous α foundation station antenna;

(3) at the antenna for base station subset S of the antenna for base station of state of activation _min definite situation, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(4) calculate antenna for base station subset S _mthroughput of system;

(5) repeat (3) and (4), travel through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _mand user terminal combination U ^opt;

When preference pattern is for B.2 time, antenna for base station is selected and user terminal selecting comprises the following steps:

(1) close all antenna for base station;

(2) activate successively continuous α foundation station antenna;

(3) at the antenna for base station subset S of the antenna for base station of state of activation _min definite situation, the instantaneous channel condition information that utilization is obtained or statistical channel state information, computing system throughput or channel relevancy degree, according to throughput of system maximization or channel relevancy, minimize criterion, selecting to send as an envoy to, throughput of system maximizes or the minimized user terminal combination of channel relevancy U ^opt;

(4) calculate antenna for base station subset S _mthroughput of system;

(5) repeat (3) and (4), travel through all antenna for base station;

(6) according to throughput of system, maximize criterion, antenna for base station subset S during selective system throughput maximum _mand user terminal combination U ^opt; α is the positive integer within 1-5.

2. the selection antenna for base station of extensive mimo system according to claim 1 and user terminal method, is characterized in that: the process of the statistical channel state information that base station obtains is: after by user terminal, the instantaneous channel condition information in transmitting procedure being added up, feed back to base station or base station is added up the instantaneous information feedback value in transmitting procedure.

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