CN101964700B - Signal transmission processing method, signal transmission control method, signal transmission system, user equipment (UE) and base station - Google Patents

Abstract

The embodiment of the invention discloses a signal transmission processing method, a signal transmission control method, a signal transmission system, user equipment (UE) and a base station. The signal transmission processing method comprises the following steps of: receiving first signal-to-noise ratio offset sent by the base station; acquiring channel quality indicator (CQI) information transmitted in a second-layer space according to a codebook and the first signal-to-noise ratio offset, wherein the codebook comprises a codebook transmitted by the base station or a codebook predetermined by the base station; and feeding the CQI information back to the base station, so that the base station performs signal transmission processing according to the CQI information. In the embodiment of the invention, the UE is only provided with one transmitting antenna, but the UE still can realize two-layer beamforming (BF) transmission; and the UE has low calculation load and does not need the feedback expense of the codebook.

Description

Process of signal transmission, control method and system and subscriber equipment and base station

Technical field

The embodiment of the present invention relates to communication technical field, particularly relates to a kind of process of signal transmission, control method and system and subscriber equipment and base station.

Background technology

Along with improving constantly of requiring throughput of system, two-layer beam forming (beamforming, hereinafter referred to as: BF) transmission replaces individual layer BF transmission gradually.

In existing two-layer BF transmission technology, subscriber equipment (User Equipment, hereinafter referred to as: average signal-to-noise ratio UE) first can measuring down public guide frequency, obtain the channel quality corresponding with this average signal-to-noise ratio by tabling look-up and indicate (channel quality indicator, hereinafter referred to as: CQI), then by this CQI feedback to base station.Base station can adjust the CQI received, thus obtains the CQI1 of ground floor space propagation.According to the reciprocity of up-downgoing channel, base station can increase the CQI2 that gain delta obtains second layer space propagation on the basis of CQI1, and order of modulation and the channel coding rate of two-layer transfer of data are set respectively according to CQI1 and CQI2, and be transferred to UE by data in two-layer BF mode in conjunction with channel matrix H.But, when UE only arranges 1 transmitting electric wire, two-layer BF transmission cannot be carried out.In order to solve this technical problem, the method that prior art adopts can be: base station sends omni-beam signal vector to UE, and UE can carry out equivalent channel estimation according to this omni-beam signal vector, obtains equivalent channel matrix H _e; Then UE selects a code book C in its codebook set ∏ _i, according to this code book C _iand equivalent channel matrix H _eetc. the signal to noise ratio SINR of the two-layer BF transmission of calculation of parameter ₁and SINR ₂, according to SINR ₁and SINR ₂calculate corresponding throughput T respectively ₁and T ₂, thus determine code book C _icorresponding throughput T=T ₁+ T ₂, UE, by calculating the throughput of all code books, can be determined at the code book C that maximum throughput is corresponding _d, and according to this code book C _dcorresponding signal to noise ratio SINR ₁and SINR ₂table look-up and determine corresponding CQI; Finally, code book Cd and two CQI feedback to base station, thus makes base station according to code book C by UE _d, CQI and spatial manipulation vector carry out signal transmission.

Inventor is realizing in process of the present invention, at least there are the following problems to find prior art: transmit although prior art also can realize two-layer BF when UE only arranges a transmitting antenna, but UE needs to select code book through complicated and a large amount of calculating, causes the calculated load of UE larger; And UE is after code book is determined in selection, also needs this code book value to feed back to base station, therefore, increases the feedback overhead of UE.

Summary of the invention

The embodiment of the present invention provides a kind of process of signal transmission, control method and system and subscriber equipment and base station, with solve prior art carry out two-layer BF transmit time, the calculated load of UE and the larger technical problem of feedback overhead, realize reducing the calculated load of UE and the technique effect of feedback overhead.

The embodiment of the present invention provides a kind of process of signal transmission method, comprising:

Receive the first signal to noise ratio side-play amount that base station sends;

According to code book and described first signal to noise ratio side-play amount, obtain the channel quality indication (CQI) information of the two-layer transmission in space, described code book comprises the code book that base station issues or the code book of arranging with base station in advance;

Described channel quality indication (CQI) information is fed back to described base station, carries out process of signal transmission for described base station according to described channel quality indication (CQI) information.

The embodiment of the present invention provides a kind of Signal transmissions control method, comprising:

The first signal to noise ratio side-play amount is sent to subscriber equipment;

Receive the channel quality indication (CQI) information of the two-layer transmission in space that described subscriber equipment obtains according to code book and described first signal to noise ratio side-play amount, described code book comprises the code book that base station issues or the code book of arranging with base station in advance;

Process of signal transmission is carried out according to described channel quality indication (CQI) information.

The embodiment of the present invention provides a kind of subscriber equipment, comprising:

First receiver module, for receiving the first signal to noise ratio side-play amount that base station sends;

Acquisition module, for according to code book and described first signal to noise ratio side-play amount, obtain the channel quality indication (CQI) information of the two-layer transmission in space, described code book comprises the code book that base station issues or the code book of arranging with base station in advance;

First sending module, for described channel quality indication (CQI) information is fed back to described base station, carries out process of signal transmission for described base station according to described channel quality indication (CQI) information.

The embodiment of the present invention provides a kind of base station, comprising:

Second sending module, for sending the first signal to noise ratio side-play amount to subscriber equipment;

Second receiver module, for receiving the channel quality indication (CQI) information of the two-layer transmission in space that described subscriber equipment obtains according to code book and described first signal to noise ratio side-play amount, described code book comprises the code book that base station issues or the code book of arranging with base station in advance;

Processing module, for carrying out process of signal transmission according to described channel quality indication (CQI) information.

The embodiment of the present invention also provides a kind of signal transmission system, comprises above-mentioned base station.

In the embodiment of the present invention, the code book that UE both can have been issued by base station and the first signal to noise ratio side-play amount, the CQI needed for two-layer BF transmission is carried out in calculating acquisition base station, the code book of making an appointment with base station that also can store according to it and the first signal to noise ratio side-play amount, calculate the CQI obtaining base station and carry out needed for two-layer BF transmission.Due in this process, base station need not know that the channel matrix of UE calculates corresponding CQI, calculates the operation obtaining CQI and is completed by UE, even if UE only arranges a transmitting antenna, also can calculate the CQI obtaining the two-layer transmission in space, thus carry out two-layer BF transmission.And in the embodiment of the present invention, UE selects code book without the need to the calculating carrying out large amount of complex, thus reduces the calculated load of UE.In addition, therefore UE also without the need to feeding back to base station by this code book again, and the embodiment of the present invention also reduces the feedback overhead of UE, saved channel resource.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the flow chart of a process of signal transmission method of the present invention embodiment;

Fig. 2 is the flow chart of another embodiment of process of signal transmission method of the present invention;

Fig. 3 is the flow chart of a Signal transmissions control method of the present invention embodiment;

Fig. 4 is the flow chart of the inventive method embodiment;

Fig. 5 is the structural representation of a subscriber equipment of the present invention embodiment;

Fig. 6 is the structural representation of another embodiment of subscriber equipment of the present invention;

Fig. 7 is the structural representation of the embodiment in base station of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Fig. 1 is the flow chart of a process of signal transmission method of the present invention embodiment, and as shown in Figure 1, the method for the present embodiment comprises:

The first signal to noise ratio side-play amount that step 101, reception base station send;

UE receives the first signal to noise ratio offset Δ that base station sends ₁, this first signal to noise ratio offset Δ ₁the adjustment process of signal to noise ratio is carried out, to correct the error of signal to noise ratio for follow-up UE.

Step 102, according to code book and described first signal to noise ratio side-play amount, obtain the channel quality indication (CQI) information of the two-layer transmission in space, described code book comprises the code book that base station issues or the code book of arranging with base station in advance;

For example, code book C _xcan be that (long term evolution, hereinafter referred to as 2 antenna codebooks LTE) in R8 for Long Term Evolution.In the present embodiment, because the comparison in difference between code book is little, therefore code book both can be selected according to antenna configuration in base station, also can preset a fixing code book, then by high-level signaling by this code book C _xsend to UE.The two-layer transmission in space in the present embodiment is and adopts two space transmission channel with signal transmission in Signal transmissions simultaneously.

Such as, if base station configuration level/vertical polarized antenna battle array, UE also configuration level/vertical polarized antenna battle array, then code book C as follows can be selected in base station ₀:

$C_0=\frac{1}{\sqrt{2}}\left[\begin{array}{cc}1& 0\\ 0& 1\end{array}\right]$

Under this antenna configuration, space ground floor signal transmits in vertical polarized antenna array element, and space second layer signal transmits in horizonally-polarized array unit.For have employed the UE of horizontal/vertical poliarizing antenna battle array, horizontally-polarized antenna can receive the horizontal polarization wave beam of base station, and vertical polarized antenna can receive the perpendicular polarization wave beam of base station, now can avoid polarization loss.

If base station configuration +/-45 degree of poliarizing antenna battle arrays, and user device configuration is horizontal/vertical poliarizing antenna battle array, then code book C as follows can be selected in base station ₁or C ₂:

$C_1=\frac{1}{2}\left[\begin{array}{cc}1& 1\\ 1& -1\end{array}\right],$ $C_2=\frac{1}{2}\left[\begin{array}{cc}1& 1\\ i& -i\end{array}\right]$

Under this antenna configuration, space ground floor signal transmits simultaneously in+45 degree poliarizing antenna array elements and-45 degree poliarizing antenna array elements; Space second layer signal is also like this.For have employed the UE of horizontal/vertical poliarizing antenna battle array, horizonally polarized receiving antenna can receive the signal of two different polarization wave beams from base station, and perpendicular polarization reception antenna also can receive the signal of two different polarization wave beams from base station.

UE is according to code book C _xand first signal to noise ratio side-play amount can obtain the CQI of the two-layer transmission in space.This code book can send to UE by base station, also can be that UE and base station are appointed in advance.Because the difference between each code book in performance is little, therefore, UE and base station arrange code book in advance both can not influential system performance, can also save the channel resource of base station to UE transmission code book.

In process of signal transmission method of the present invention embodiment, described in step 102 according to described code book and the first signal to noise ratio side-play amount, obtain the channel quality indication (CQI) information of the two-layer transmission in space, can comprise: according to described code book, calculate respectively and obtain space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio;

Apply described first signal to noise ratio side-play amount and adjustment process is carried out to described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio, and obtain corresponding ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information according to the space ground floor transmission signal to noise ratio after adjustment and space second layer transmission signal to noise ratio;

For example, UE can estimate equivalent channel H according to omni-beam signal vector Y _e:

$H_e=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]$

UE adopts least mean-square error (minimum mean squared error, hereinafter referred to as: MMSE) Processing Algorithm, according to following formula, calculate in the two-layer transmission in space, kth (k=1,2) the transmission signal to noise ratio corresponding to layer signal transmission, i.e. space ground floor transmission signal to noise ratio SINR ₁with space second layer transmission signal to noise ratio SINR ₂:

${\mathrm{SINR}}_k=\frac{1}{{\left({(\frac{\mathrm{\ρ}}{M}{H_0}^H{H}_0+I_M)}^{-1}\right)}_{k,k}}-1$

Wherein, H _o=H _ec _x, I _mthe unit matrix of M dimension (M=2), $\mathrm{\ρ}=\frac{E_s}{N_0},$ E _sthe total transmitting power in base station, N ₀it is noise power spectral density.

Then, UE is according to SINR _k, and the first signal to noise ratio offset Δ that base station notifies ₁, to space ground floor transmission signal to noise ratio SINR ₁with space second layer transmission signal to noise ratio SINR ₂carry out adjustment process, obtain the transmission signal to noise ratio after adjustment: SINR ' _k=SINR _k+ Δ ₁, UE can obtain the CQI of the two-layer transmission in space by the mode of tabling look-up, i.e. ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2.

Step 103, described channel quality indication (CQI) information is fed back to described base station, carry out process of signal transmission for described base station according to described channel quality indication (CQI) information.

Described ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information can be fed back to described base station by UE, feed back to base station by CQI1 and CQI2.Base station can estimate the angle of arrival of upward signal, and (Direction of Arrival, hereinafter referred to as DoA) numerical value θ.If the spacing of same polarization bay is half wavelength, so according to DoA numerical value, the spatial manipulation vector of 4 array elements can be obtained:

$V=\frac{1}{2}\left[\begin{array}{cccc}1& e^{\mathrm{i\π}\sin \mathrm{\θ}}& e^{i2\mathrm{\π}\sin \mathrm{\θ}}& e^{i3\mathrm{\π}\sin \mathrm{\θ}}\end{array}\right]$

If information symbol vector to be sent is S=[s1, s2], then base station determines order of modulation and the code rate of s1 and s2 accordingly according to CQI1 and CQI2 received, and base station can obtain according to following formula and transmit:

$\left[\begin{array}{cc}{V}_1& 0\\ 0& V_2\end{array}\right]C_{d}S$

Wherein, V ₁and V ₂the spatial manipulation vector obtained according to V respectively, V ₁and V ₂can be the same or different, C _xit is the code book that aforementioned base station sends to UE.

So far, two-layer BF transmission can be carried out to sent signal in base station.

In process of signal transmission method above-described embodiment of the present invention, the code book that UE both can have been issued by base station and the first signal to noise ratio side-play amount, the CQI needed for two-layer BF transmission is carried out in calculating acquisition base station, the code book of making an appointment with base station that also can store according to it and the first signal to noise ratio side-play amount, calculate the CQI obtaining base station and carry out needed for two-layer BF transmission.Due in this process, base station need not know that the channel matrix of UE calculates corresponding CQI, calculates the operation obtaining CQI and is completed by UE, even if UE only arranges a transmitting antenna, also can calculate the CQI obtaining the two-layer transmission in space, thus carry out two-layer BF transmission.And in the embodiment of the present invention, UE selects code book without the need to the calculating carrying out large amount of complex, thus reduces the calculated load of UE.In addition, UE is also without the need to feeding back to base station by this code book again, and therefore, the embodiment of the present invention also reduces the feedback overhead of UE, has saved channel resource.Its this mode of code book of arranging with base station stored is obtained for UE, have further been omitted base station issues step from code book to UE, thus under the prerequisite that can not reduce systematic function, further save channel resource.

In another embodiment of process of signal transmission method of the present invention, can also comprise: receive the second signal to noise ratio side-play amount that base station sends, calculate the channel quality indication (CQI) information obtaining space one deck transmission according to described second signal to noise ratio side-play amount; Described in step 103 described channel quality indication (CQI) information is fed back to described base station before, can also comprise: the channel quality indication (CQI) information according to the two-layer transmission in described space calculates the throughput obtaining the two-layer transmission in space, and calculate the throughput obtaining one deck transmission of described space according to the channel quality indication (CQI) information of described space one deck transmission; Described described channel quality indication (CQI) information is fed back to described base station, can comprise: when the throughput that the throughput of the two-layer transmission in described space is greater than space one deck transmission is large, the channel quality indication (CQI) information corresponding with the throughput of the two-layer transmission in described space is fed back to described base station.When the throughput of the two-layer transmission in described space is less than or equal to the throughput of space one deck transmission, then the channel quality indication (CQI) information corresponding with the throughput that described space one deck transmits is fed back to described base station.

Further, the described channel quality indication (CQI) information calculating one deck transmission of acquisition space according to described second signal to noise ratio side-play amount, comprise: apply described second signal to noise ratio side-play amount and adjustment process is carried out to the signal to noise ratio that described space one deck transmits, and obtain the channel quality indication (CQI) information of corresponding space one deck transmission according to the signal to noise ratio of the space one deck transmission after adjustment.

Fig. 2 is the flow chart of another embodiment of process of signal transmission method of the present invention, and as shown in Figure 2, the method for the present embodiment comprises:

The code book C that step 201, reception base station send _x, the first signal to noise ratio offset Δ ₁and the second signal to noise ratio offset Δ ₂.

Wherein, code book C _xcan be 2 antenna codebooks in LTE R8.In the present embodiment, code book both can be selected according to antenna configuration in base station, then by high-level signaling by this code book C _xsend to UE; And due to the comparison in difference between code book little, the code book C therefore in step 201 _xalso can be realize agreement between base station and UE, thus this code book is stored in UE, so that follow-up use, and issue without base station busy channel resource.

First signal to noise ratio offset Δ ₁and the second signal to noise ratio offset Δ ₂be respectively used to carry out adjustment process to the signal to noise ratio of the two-layer transmission in space and the transmission of space one deck.The two-layer transmission in space in the present embodiment is and adopts two space transmission channel with signal transmission in Signal transmissions simultaneously, and one deck transmission in space is and only adopts a space transmission channel with signal transmission in Signal transmissions.The present embodiment also adopts space one deck transmission while the employing two-layer transmission in space, and namely the present embodiment have employed two kinds of transmission modes.

Step 202, estimate equivalent channel H according to this omni-beam signal vector Y _e.

UE estimates equivalent channel H according to omni-beam signal vector Y _ecan be:

$H_e=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]$

Step 203, according to equivalent channel H _eand code book C _xthe transmission signal to noise ratio of the two-layer transmission of computer memory, and the throughput T obtaining the two-layer transmission in space according to the transmission signal to noise ratio of the two-layer transmission in space ₂.

The transmission signal to noise ratio of the two-layer transmission in space is space ground floor transmission signal to noise ratio SINR ₁with second layer transmission signal to noise ratio SINR ₂, its calculating can adopt following formula:

${\mathrm{SINR}}_k=\frac{1}{{\left({(\frac{\mathrm{\ρ}}{M}{H_0}^H{H}_0+I_M)}^{-1}\right)}_{k,k}}-1$

Wherein, H _o=H _ec _x, I _mthe unit matrix of M dimension (M=2), $\mathrm{\ρ}=\frac{E_s}{N_0},$ E _sthe total transmitting power in base station, N ₀it is noise power spectral density.

Then, UE is according to the SINR obtained _k, and the first signal to noise ratio offset Δ of base station notice ₁, to space ground floor transmission signal to noise ratio SINR ₁with second layer transmission signal to noise ratio SINR ₂carry out adjustment process, obtain the transmission signal to noise ratio after adjustment: SINR ' _k=SINR _k+ Δ ₁, UE can obtain the CQI of the two-layer transmission in space by the mode of tabling look-up, i.e. ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2.Then, the throughput T obtaining the two-layer transmission in space (rank=2) is calculated according to this ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2 ₂.

Step 204, according to receive channel, calculate and obtain space one deck transmission signal to noise ratio, and obtain the throughput T of space one deck transmission according to space one deck transmission signal to noise ratio ₁.

The present embodiment can establish public guide frequency to be present in antenna 1 and the antenna 5 of base station side.If UE has 2 reception antennas, the average signal-to-noise ratio so measured is:

${\mathrm{SINR}}_0=\frac{\mathrm{\ρ}}{4}({\left|h_{11}\right|}^2+{\left|h_{15}\right|}^2+{\left|h_{21}\right|}^2+{\left|h_{25}\right|}^2)$

Wherein: $\mathrm{\ρ}=\frac{E_s}{N_0},$ E _sthe total transmitting power in base station, N ₀it is noise power spectral density.H _mnchannel (m=1 ~ 2 between m reception antenna and the n-th transmitting antenna; N=1 ~ 8).UE is according to SINR ₀, and the second signal to noise ratio offset Δ that base station notifies ₀carry out adjustment process, obtain the space one deck transmission signal to noise ratio after adjustment:

SINR′ ₀＝SINR ₀+Δ ₀，

UE also can obtain the CQI of space one deck transmission by the mode of tabling look-up, i.e. CQI0 can calculate the throughput T obtaining space one deck transmission (rank=1) according to this CQI0 ₁.

It should be noted that sequencing be there is no between step 203 and step 204.

Step 205, judge T ₂whether be greater than T ₁if then perform step 206, otherwise perform step 207.

Judge T ₂whether be greater than T ₁process be and judge under current state, whether the transmission performance of the two-layer transmission in space is greater than the transmission performance of space one deck transmission, and during the two-layer transmission in space and space one deck transmit, which transmission performance is good, and namely which kind of transmission mode is throughput greatly just use.

Step 206, the CQI of two-layer for space transmission and corresponding transmission mode are sent to base station.

CQI1 and CQI2 and rank=2 is sent to base station, thus when making base station get rank=2, can know that the throughput of the two-layer transmission of current spatial is comparatively large, thus can according to CQI1 and CQI2 and code book C _xcarry out the two-layer transmission in space.

Step 207, the CQI transmitted by space one deck and corresponding transmission mode send to base station.

CQI0 and rank=1 is sent to base station, thus when making base station get rank=1, can know that the throughput that current spatial one deck transmits is comparatively large, thus carry out space one deck transmission according to CQI0.

In process of signal transmission method above-described embodiment of the present invention, UE is by receiving code book and the first signal to noise ratio side-play amount of base station transmission, the CQI obtaining base station and carry out needed for two-layer BF transmission can be calculated, or the code book of making an appointment with base station stored according to it and the first signal to noise ratio side-play amount, the CQI needed for two-layer BF transmission is carried out in calculating acquisition base station, also can calculate according to the receive channel of UE itself and the second signal to noise ratio side-play amount the CQI obtained needed for one deck transmission of space, and according to the two-layer throughput transmitting the two-layer transmission of CQI computer memory in space, according to the throughput of space one deck transmission CQI computer memory one deck transmission, and indicate base station to transmit with the form that throughput is larger.Due in this process, base station need not know that the channel matrix of UE calculates corresponding CQI, calculates the operation obtaining CQI and is completed by UE, even if UE only arranges a transmitting antenna, also can calculate the CQI obtaining the two-layer transmission in space, thus carry out two-layer BF transmission.And in the embodiment of the present invention, UE selects code book without the need to the calculating carrying out large amount of complex, thus reduces the calculated load of UE.In addition, therefore UE also without the need to feeding back to base station by this code book again, and the embodiment of the present invention also reduces the feedback overhead of UE, saved channel resource.Its this mode of code book of arranging with base station stored is obtained for UE, have further been omitted base station issues step from code book to UE, thus under the prerequisite that can not reduce systematic function, further save channel resource.And the transmission mode that base station can be reported by UE transmits in preferably mode, thus improves the transmission quality of signal.

Fig. 3 is the flow chart of a Signal transmissions control method of the present invention embodiment, and as shown in Figure 3, the method for the present embodiment comprises:

Step 301, send the first signal to noise ratio side-play amount to subscriber equipment;

Base station can send the first signal to noise ratio offset Δ to UE ₁, this first signal to noise ratio offset Δ ₁the adjustment process of signal to noise ratio is carried out for follow-up UE.

Step 302, receive the channel quality indication (CQI) information of the two-layer transmission in space that described subscriber equipment obtains according to code book and described first signal to noise ratio side-play amount;

For example, base station can by high-level signaling by this code book C _xsend to this code book of UE C _xcan be 2 antenna codebooks in LTE R8.In the present embodiment, this code book can send to UE by base station, also can be that UE and base station are appointed in advance.Because the difference between each code book in performance is little, therefore, UE and base station arrange code book in advance both can not influential system performance, can also save the channel resource of base station to UE transmission code book.The two-layer transmission in space in the present embodiment is and adopts two space transmission channel with signal transmission in Signal transmissions simultaneously.Such as, if base station configuration level/vertical polarized antenna battle array, UE also configuration level/vertical polarized antenna battle array, then code book C as follows can be selected in base station ₀:

$C_0=\frac{1}{\sqrt{2}}\left[\begin{array}{cc}1& 0\\ 0& 1\end{array}\right]$

Under this antenna configuration, space ground floor signal transmits in vertical polarized antenna array element, and space second layer signal transmits in horizonally-polarized array unit.For have employed the UE of horizontal/vertical poliarizing antenna battle array, horizontally-polarized antenna can receive the horizontal polarization wave beam of base station, and vertical polarized antenna can receive the perpendicular polarization wave beam of base station, now can avoid polarization loss.

If base station configuration +/-45 degree of poliarizing antenna battle arrays, and user device configuration is horizontal/vertical poliarizing antenna battle array, then code book C as follows can be selected in base station ₁or C ₂:

$C_1=\frac{1}{2}\left[\begin{array}{cc}1& 1\\ 1& -1\end{array}\right],$ $C_2=\frac{1}{2}\left[\begin{array}{cc}1& 1\\ i& -i\end{array}\right]$

Under this antenna configuration, space ground floor signal transmits simultaneously in+45 degree poliarizing antenna array elements and-45 degree poliarizing antenna array elements; Space second layer signal is also like this.For have employed the UE of horizontal/vertical poliarizing antenna battle array, horizonally polarized receiving antenna can receive the signal of two different polarization wave beams from base station, and perpendicular polarization reception antenna also can receive the signal of two different polarization wave beams from base station.

UE is according to code book C _xand first signal to noise ratio side-play amount can obtain the CQI of the two-layer transmission in space.

In Signal transmissions control method of the present invention embodiment, the channel quality indication (CQI) information of the two-layer transmission in space that the described subscriber equipment of the reception described in step 302 obtains according to described code book and described first signal to noise ratio side-play amount, can comprise: receive described subscriber equipment and calculate acquisition space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio respectively according to described code book, apply described first signal to noise ratio side-play amount to carry out adjusting process to described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio and the ground floor channel quality indication (CQI) information obtained according to the space ground floor transmission signal to noise ratio after adjustment and space second layer transmission signal to noise ratio and second layer channel quality indication (CQI) information.

For example, UE can estimate equivalent channel H according to omni-beam signal vector Y _e:

$H_e=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]$

UE adopts MMSE Processing Algorithm, according to following formula, calculates in the two-layer transmission in space, kth (k=1,2) the transmission signal to noise ratio corresponding to layer signal transmission, i.e. space ground floor transmission signal to noise ratio SINR ₁with space second layer transmission signal to noise ratio SINR ₂:

${\mathrm{SINR}}_k=\frac{1}{{\left({(\frac{\mathrm{\ρ}}{M}{H_0}^H{H}_0+I_M)}^{-1}\right)}_{k,k}}-1$

Wherein, H _o=H _ec _x, I _mthe unit matrix of M dimension (M=2), $\mathrm{\ρ}=\frac{E_s}{N_0},$ E _sthe total transmitting power in base station, N ₀it is noise power spectral density.

Then, UE is according to SINR _k, and the first signal to noise ratio offset Δ that base station notifies ₁, to space ground floor transmission signal to noise ratio SINR ₁with space second layer transmission signal to noise ratio SINR ₂carry out adjustment process, obtain the transmission signal to noise ratio after adjustment: SINR ' _k=SINR _k+ Δ ₁, UE can obtain the CQI of the two-layer transmission in space by the mode of tabling look-up, i.e. ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2.

Step 303, carry out process of signal transmission according to described channel quality indication (CQI) information.

CQI1 and CQI2 is fed back to base station by UE.Base station can estimate the DoA numerical value θ of upward signal.If the spacing of same polarization bay is half wavelength, so according to DoA numerical value, the spatial manipulation vector of 4 array elements can be obtained:

$V=\frac{1}{2}\left[\begin{array}{cccc}1& e^{\mathrm{i\π}\sin \mathrm{\θ}}& e^{i2\mathrm{\π}\sin \mathrm{\θ}}& e^{i3\mathrm{\π}\sin \mathrm{\θ}}\end{array}\right]$

If information symbol vector to be sent is S=[s1, s2], then base station determines order of modulation and the code rate of s1 and s2 accordingly according to CQI1 and CQI2 received, and base station can obtain according to following formula and transmit:

$\left[\begin{array}{cc}{V}_1& 0\\ 0& V_2\end{array}\right]C_{d}S$

Wherein, V ₁and V ₂the spatial manipulation vector obtained according to V respectively, V ₁and V ₂can be the same or different, C _xit is the code book that aforementioned base station sends to UE.

So far, two-layer BF transmission can be carried out to sent signal in base station.

In Signal transmissions control method above-described embodiment of the present invention, after code book and the first signal to noise ratio side-play amount are sent to UE by base station, UE can calculate the CQI obtaining base station and carry out needed for two-layer BF transmission.Due in this process, base station need not know that the channel matrix of UE calculates corresponding CQI, calculates the operation obtaining CQI and is completed by UE, even if UE only arranges a transmitting antenna, also can calculate the CQI obtaining the two-layer transmission in space, thus carry out two-layer BF transmission.And in the embodiment of the present invention, UE selects code book without the need to the calculating carrying out large amount of complex, thus reduces the calculated load of UE.In addition, therefore UE also without the need to feeding back to base station by this code book again, and the embodiment of the present invention also reduces the feedback overhead of UE, saved channel resource.Its this mode of code book of arranging with base station stored is obtained for UE, have further been omitted base station issues step from code book to UE, thus under the prerequisite that can not reduce systematic function, further save channel resource.

In another embodiment of Signal transmissions control method of the present invention, can also comprise: send the second signal to noise ratio side-play amount to subscriber equipment, calculate the channel quality indication (CQI) information obtaining space one deck transmission for described subscriber equipment according to described second signal to noise ratio side-play amount.The channel quality indication (CQI) information of the two-layer transmission in space that the described subscriber equipment of the reception described in step 302 obtains according to described code book and the first signal to noise ratio side-play amount, can comprise: during the throughput that space one deck that the throughput receiving the two-layer transmission in space that described subscriber equipment obtains according to the channel quality indication (CQI) information calculating of the two-layer transmission in described space is greater than the channel quality indication (CQI) information calculating acquisition that described subscriber equipment transmits according to described space one deck transmits, the channel quality indication (CQI) information of the two-layer transmission in space that described subscriber equipment feeds back.When the throughput of the two-layer transmission in described space is less than or equal to the throughput of described space one deck transmission, receive the channel quality indication (CQI) information of space one deck transmission that described subscriber equipment sends.

In another embodiment of Signal transmissions control method of the present invention, can also comprise: the channel vector obtaining the up transmitting antenna of subscriber equipment, describedly carry out process of signal transmission according to described channel quality indication (CQI) information, comprising: carry out process of signal transmission according to described channel vector, described channel quality indication (CQI) information.

Fig. 4 is the flow chart of the inventive method embodiment, and as shown in Figure 4, the method for the present embodiment can comprise:

Step 401, base station send omni-beam signal vector Y, the first signal to noise ratio offset Δ to UE ₁and the second signal to noise ratio offset Δ ₂;

Omni-beam signal vector Y is:

$Y=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]S+n$

First signal to noise ratio offset Δ ₁and the second signal to noise ratio offset Δ ₂be respectively used to carry out adjustment process to the signal to noise ratio of the two-layer transmission in space and the transmission of space one deck.The two-layer transmission in space in the present embodiment is and adopts two space transmission channel with signal transmission in Signal transmissions simultaneously, and one deck transmission in space is and only adopts a space transmission channel with signal transmission in Signal transmissions.The present embodiment also adopts space one deck transmission while the employing two-layer transmission in space, and namely the present embodiment have employed two kinds of transmission modes.

Step 402, UE estimate equivalent channel H according to this omni-beam signal vector Y _e

UE estimates equivalent channel H according to omni-beam signal vector Y _ecan be:

$H_e=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]$

Step 403, UE are according to equivalent channel H _eand code book C _xthe transmission signal to noise ratio of the two-layer transmission of computer memory, and the throughput T obtaining the two-layer transmission in space according to the transmission signal to noise ratio of the two-layer transmission in space ₂.

Wherein, code book C _xcan be 2 antenna codebooks in LTE R8.This code book can be that UE and base station are appointed in advance.Because the difference between each code book in performance is little, therefore, UE and base station arrange code book in advance both can not influential system performance, can also save the channel resource of base station to UE transmission code book.

The transmission signal to noise ratio of the two-layer transmission in space is space ground floor transmission signal to noise ratio SINR ₁with space second layer transmission signal to noise ratio SINR ₂, its calculating can adopt following formula:

${\mathrm{SINR}}_k=\frac{1}{{\left({(\frac{\mathrm{\ρ}}{M}{H_0}^H{H}_0+I_M)}^{-1}\right)}_{k,k}}-1$

Wherein, H _o=H _ec _x, I _mthe unit matrix of M dimension (M=2), $\mathrm{\ρ}=\frac{E_s}{N_0},$ E _sthe total transmitting power in base station, N ₀it is noise power spectral density.

Then, UE is according to the SINR obtained _k, and the first signal to noise ratio offset Δ of base station notice ₁, to space ground floor transmission signal to noise ratio SINR ₁with second layer transmission signal to noise ratio SINR ₂carry out adjustment process, obtain the transmission signal to noise ratio of the two-layer transmission in space after adjustment: SINR ' _k=SINR _k+ Δ ₁, UE can obtain the CQI of the two-layer transmission in space by the mode of tabling look-up, i.e. ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2.Then, the throughput T obtaining the two-layer transmission in space (rank=2) is calculated according to this ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2 ₂.

Step 404, UE, according to receive channel, calculate and obtain space one deck transmission signal to noise ratio, and obtain the throughput T of space one deck transmission according to space one deck transmission signal to noise ratio ₁.

The present embodiment can establish public guide frequency to be present in antenna 1 and the antenna 5 of base station side.If UE has 2 reception antennas, the average signal-to-noise ratio so measured is:

${\mathrm{SINR}}_0=\frac{\mathrm{\ρ}}{4}({\left|h_{11}\right|}^2+{\left|h_{15}\right|}^2+{\left|h_{21}\right|}^2+{\left|h_{25}\right|}^2)$

Wherein: $\mathrm{\ρ}=\frac{E_s}{N_0},$ E _sthe total transmitting power in base station, N ₀it is noise power spectral density.H _mnchannel (m=1 ~ 2 between m reception antenna and the n-th transmitting antenna; N=1 ~ 8).UE is according to SINR ₀, and the second signal to noise ratio offset Δ that base station notifies ₀carry out adjustment process, obtain the space one deck transmission signal to noise ratio after adjustment:

SINR′ ₀＝SINR ₀+Δ ₀，

UE also can obtain the CQI of space one deck transmission by the mode of tabling look-up, i.e. CQI0 can calculate the throughput T obtaining space one deck transmission (rank=1) according to this CQI0 ₁.

It should be noted that sequencing be there is no between step 403 and step 404.

Step 405, UE judge T ₂whether be greater than T ₁if then perform step 406, otherwise perform step 407.

UE judges T ₂whether be greater than T ₁process be and judge under current state, whether the transmission performance of the two-layer transmission in space is greater than the transmission performance of space one deck transmission, and during the two-layer transmission in space and space one deck transmit, which transmission performance is good, and namely which kind of transmission mode is throughput greatly just use.

Step 406, the CQI of two-layer for space transmission and corresponding transmission mode are sent to base station, and perform step 408.

CQI1 and CQI2 and rank=2 is sent to base station, thus when making base station get rank=2, can know that the throughput of the two-layer transmission of current spatial is comparatively large, thus can according to CQI1 and CQI2 and code book C _xcarry out the two-layer transmission in space.

Step 407, the CQI transmitted by space one deck and corresponding transmission mode send to base station, and perform step 409.

CQI0 and rank=1 is sent to base station, thus when making base station get rank=1, can know that the throughput that current spatial one deck transmits is comparatively large, thus according to CQI0 and code book C _xcarry out space one deck transmission.

Step 408, base station to be determined to transmit the two-layer transmission of row space of going forward side by side according to CQI1, CQI2 and rank.

Base station can be known and two-layer for employing BF transmission mode transmitted after acquisition rank=2.The order of modulation that two layer signals are corresponding and code rate can be determined respectively according to CQI1 CQI2.When specific implementation, base station can estimate the DoA numerical value θ of upward signal.If the spacing of same polarization bay is half wavelength, so according to DoA numerical value, the spatial manipulation vector of 4 array elements can be obtained:

$V=\frac{1}{2}\left[\begin{array}{cccc}1& e^{\mathrm{i\π}\sin \mathrm{\θ}}& e^{i2\mathrm{\π}\sin \mathrm{\θ}}& e^{i3\mathrm{\π}\sin \mathrm{\θ}}\end{array}\right]$

If information symbol vector to be sent is S=[s1, s2], then base station determines order of modulation and the code rate of s1 and s2 accordingly according to CQI1 and CQI2 received, and base station can obtain according to following formula and transmit:

$\left[\begin{array}{cc}{V}_1& 0\\ 0& V_2\end{array}\right]C_{d}S$

Wherein, V ₁and V ₂the spatial manipulation vector obtained according to V respectively, V ₁and V ₂can be the same or different, C _xit is the code book that aforementioned base station sends to UE.

So far, two-layer BF transmission can be carried out to sent signal in base station.

As rank=2, transmitting of determining also can be:

$\left[\begin{array}{cc}{\tilde{h}}_{1~4}& 0\\ 0& {\tilde{h}}_{5~8}\end{array}\right]C_{x}S$

H=[h ₁h ₂Λ h ₈] ^tit is the channel vector obtained from a fixing up transmitting antenna of UE.

Wherein, C _xthe code book that eNB selects according to antenna configuration, S=[s1, s2] ^tthe information symbol vector sent, with the shaping vector of two poliarizing antenna battle arrays respectively, and,

$h_{1~4}^{\′}=\frac{{\left(h_{1~4}\right)}^H}{h_1}$ ${\tilde{h}}_{1~4}=\frac{{\left(h_{1~4}^{\′}\right)}^H}{\left|\right|h_{1~4}^{\′}\left|\right|}$ $h_{5~8}^{\′}=\frac{{\left(h_{5~8}\right)}^H}{h_5}$ ${\tilde{h}}_{5~8}=\frac{{\left(h_{5~8}^{\′}\right)}^H}{\left|\right|h_{5~8}^{\′}\left|\right|}.$

Step 409, according to CQI0 and rank determine to transmit go forward side by side row space one deck transmission.This transmits and can be: Vs

Wherein, s is information symbol vector, and spatial manipulation vector V is:

Wherein, h=[h ₁h ₂Λ h ₈] ^tit is the channel vector obtained from a fixing up transmitting antenna of UE.

So far, space one deck transmission can be carried out to sent signal in base station.

In above-described embodiment, the code book appointed in advance with base station that UE is stored by himself, the CQI obtaining base station and carry out needed for two-layer BF transmission can be calculated, also can calculate according to the receive channel of UE itself CQI obtained needed for one deck transmission of space, and according to the two-layer throughput transmitting the two-layer transmission of CQI computer memory in space, according to the throughput of space one deck transmission CQI computer memory one deck transmission, and base station is indicated to transmit with the form that throughput is larger.Due in this process, base station need not know that the channel matrix of UE calculates corresponding CQI, calculates the operation obtaining CQI and is completed by UE, even if UE only arranges a transmitting antenna, also can calculate the CQI obtaining the two-layer transmission in space, thus carry out two-layer BF transmission.And in the present embodiment, the code book that UE uses is appointed in advance with base station, therefore, do not need base station busy channel resource to issue, thus saved channel resource while reduction UE computation complexity.And the transmission mode that base station can be reported by UE transmits in preferably mode, thus improves the transmission quality of signal.

Fig. 5 is the structural representation of a subscriber equipment of the present invention embodiment, and as shown in Figure 5, the subscriber equipment of the present embodiment comprises: the first receiver module 11, acquisition module 12 and the first sending module 13.Wherein, the first receiver module 11 is for receiving the first signal to noise ratio side-play amount of base station transmission; Acquisition module 12 is for according to code book and described first signal to noise ratio side-play amount, and obtain the channel quality indication (CQI) information of the two-layer transmission in space, described code book comprises the code book that base station issues or the code book of arranging with base station in advance; First sending module 13, for described channel quality indication (CQI) information is fed back to described base station, carries out process of signal transmission for described base station according to described channel quality indication (CQI) information.

The subscriber equipment of the present embodiment is identical with the principle of the process of signal transmission embodiment of the method shown in Fig. 1, repeats no more.

The code book that the UE of the present embodiment both can have been issued by base station and the first signal to noise ratio side-play amount, the CQI needed for two-layer BF transmission is carried out in calculating acquisition base station, the code book of making an appointment with base station that also can store according to it and the first signal to noise ratio side-play amount, calculate the CQI obtaining base station and carry out needed for two-layer BF transmission.Due in this process, base station need not know that the channel matrix of UE calculates corresponding CQI, calculates the operation obtaining CQI and is completed by UE, even if UE only arranges a transmitting antenna, also can calculate the CQI obtaining the two-layer transmission in space, thus carry out two-layer BF transmission.And in the embodiment of the present invention, UE selects code book without the need to the calculating carrying out large amount of complex, thus reduces the calculated load of UE.In addition, therefore UE also without the need to feeding back to base station by this code book again, and the embodiment of the present invention also reduces the feedback overhead of UE, saved channel resource.Its this mode of code book of arranging with base station stored is obtained for UE, have further been omitted base station issues step from code book to UE, thus under the prerequisite that can not reduce systematic function, further save channel resource.

Fig. 6 is the structural representation of another embodiment of subscriber equipment of the present invention, and as shown in Figure 6, the subscriber equipment of the present embodiment can comprise: the first receiver module 11, acquisition module 12 and the first sending module 13.Wherein, the first receiver module 11 is for receiving the first signal to noise ratio side-play amount of base station transmission; Acquisition module 12 is for according to code book and described first signal to noise ratio side-play amount, and obtain the channel quality indication (CQI) information of the two-layer transmission in space, described code book comprises the code book that base station issues or the code book of arranging with base station in advance; First sending module 13, for described channel quality indication (CQI) information is fed back to described base station, carries out process of signal transmission for described base station according to described channel quality indication (CQI) information.

Further, acquisition module 12 can comprise: the first acquiring unit 121 and second acquisition unit 122.Wherein, the first acquiring unit 121, for according to described code book, calculates respectively and obtains space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio; Second acquisition unit 122 carries out adjustment process for applying described first signal to noise ratio side-play amount to described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio, and obtains corresponding ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information according to the space ground floor transmission signal to noise ratio after adjustment and space second layer transmission signal to noise ratio; First sending module 13 is for feeding back to described base station by described ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information.

Further, described first receiver module 11 is also for receiving the second signal to noise ratio side-play amount that described base station sends, described first acquiring unit 121 is also for calculating the channel quality indication (CQI) information obtaining space one deck transmission according to described second signal to noise ratio side-play amount, channel quality indication (CQI) information according to the two-layer transmission in described space calculates the throughput obtaining the two-layer transmission in space, and the throughput obtaining one deck transmission of described space is calculated according to the channel quality indication (CQI) information of described space one deck transmission, when described first sending module 13 is large for the throughput that is greater than one deck transmission in space when the throughput of the two-layer transmission in described space, the channel quality indication (CQI) information corresponding with the throughput of the two-layer transmission in described space is fed back to described base station.First sending module 13 is also for being less than or equal to the throughput of space one deck transmission during when the throughput of the two-layer transmission in described space, the channel quality indication (CQI) information corresponding with the throughput that described space one deck transmits is fed back to described base station.

The principle of the embodiment of the method shown in the subscriber equipment of the present embodiment with the process of signal transmission method of the present invention shown in Fig. 2 and Fig. 4 is identical, repeats no more.

The UE of the present embodiment is by receiving code book and the first signal to noise ratio side-play amount of base station transmission, the CQI obtaining base station and carry out needed for two-layer BF transmission can be calculated, or the code book of making an appointment with base station stored according to it and the first signal to noise ratio side-play amount, the CQI needed for two-layer BF transmission is carried out in calculating acquisition base station, also can calculate according to the receive channel of UE itself and the second signal to noise ratio side-play amount the CQI obtained needed for one deck transmission of space, and according to the two-layer throughput transmitting the two-layer transmission of CQI computer memory in space, according to the throughput of space one deck transmission CQI computer memory one deck transmission, and indicate base station to transmit with the form that throughput is larger.Due in this process, base station need not know that the channel matrix of UE calculates corresponding CQI, calculates the operation obtaining CQI and is completed by UE, even if UE only arranges a transmitting antenna, also can calculate the CQI obtaining the two-layer transmission in space, thus carry out two-layer BF transmission.And in the embodiment of the present invention, UE selects code book without the need to the calculating carrying out large amount of complex, thus reduces the calculated load of UE.In addition, therefore UE also without the need to feeding back to base station by this code book again, and the embodiment of the present invention also reduces the feedback overhead of UE, saved channel resource.Its this mode of code book of arranging with base station stored is obtained for UE, have further been omitted base station issues step from code book to UE, thus under the prerequisite that can not reduce systematic function, further save channel resource.And the transmission mode that base station can be reported by UE transmits in preferably mode, thus improves the transmission quality of signal.

Fig. 7 is the structural representation of the embodiment in base station of the present invention, and as shown in Figure 7, the base station of the present embodiment comprises: the second sending module 14, second receiver module 15 and processing module 16.Wherein, the second sending module 14 is for sending the first signal to noise ratio side-play amount to subscriber equipment; The channel quality indication (CQI) information of the two-layer transmission in space that second receiver module 15 obtains according to code book and described first signal to noise ratio side-play amount for receiving described subscriber equipment, described code book comprises the code book that base station issues or the code book of arranging with base station in advance; Processing module 16 is for carrying out process of signal transmission according to described channel quality indication (CQI) information.

The base station of the present embodiment is identical with the principle of the Signal transmissions control method embodiment of the present invention shown in Fig. 3, repeats no more.

After code book is sent to UE by the base station of the present embodiment, UE can calculate the CQI obtaining base station and carry out needed for two-layer BF transmission.Due in this process, base station need not know that the channel matrix of UE calculates corresponding CQI, calculates the operation obtaining CQI and is completed by UE, even if UE only arranges a transmitting antenna, also can calculate the CQI obtaining the two-layer transmission in space, thus carry out two-layer BF transmission.And in the embodiment of the present invention, UE selects code book without the need to the calculating carrying out large amount of complex, thus reduces the calculated load of UE.In addition, therefore UE also without the need to feeding back to base station by this code book again, and the embodiment of the present invention also reduces the feedback overhead of UE, saved channel resource.Its this mode of code book of arranging with base station stored is obtained for UE, have further been omitted base station issues step from code book to UE, thus under the prerequisite that can not reduce systematic function, further save channel resource.

Signal transmission system of the present invention embodiment, can comprise above-mentioned base station embodiment.In signal transmission system of the present invention, UE can receive code book from base station side or obtain its code book of arranging with base station stored, and the calculating carrying out large amount of complex without the need to UE is voluntarily to select this code book, thus reduces the calculated load of UE.In addition, UE is without the need to feeding back to base station by this code book again, and therefore, the present embodiment also reduces the feedback overhead of UE, has saved channel resource.Its this mode of code book of arranging with base station stored is obtained for UE, have further been omitted base station issues step from code book to UE, thus under the prerequisite that can not reduce systematic function, further save channel resource.

Through the above description of the embodiments, those skilled in the art can be well understood to the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform the above-mentioned method of each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.It is last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention but not to be limited, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to technical scheme of the present invention or equivalent replacement, and these are revised or be equal to the spirit and scope that replacement also can not make amended technical scheme disengaging technical solution of the present invention.

Claims (15)

1. a process of signal transmission method, is characterized in that, comprising:

Receive the first signal to noise ratio side-play amount that base station sends;

According to code book and described first signal to noise ratio side-play amount, obtain the channel quality indication (CQI) information of the two-layer transmission in space, described code book is comprised base station and selects and the code book issued by high-level signaling according to the antenna configuration of the antenna configuration of described base station and subscriber equipment, or arrange with base station in advance and the code book stored, the antenna configuration of described base station and the antenna configuration of described subscriber equipment include the polarised direction of antenna;

Described channel quality indication (CQI) information is fed back to described base station, carries out process of signal transmission for described base station according to described channel quality indication (CQI) information;

Wherein, described according to code book and described first signal to noise ratio side-play amount, obtain the channel quality indication (CQI) information of the two-layer transmission in space, comprising:

According to described code book, calculate respectively and obtain space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio;

Apply described first signal to noise ratio side-play amount and adjustment process is carried out to described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio, and obtain corresponding ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information according to the space ground floor transmission signal to noise ratio after adjustment and space second layer transmission signal to noise ratio;

Described described channel quality indication (CQI) information is fed back to described base station, comprising:

Described ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information are fed back to described base station.

2. process of signal transmission method according to claim 1, is characterized in that, also comprise: receive the second signal to noise ratio side-play amount that base station sends, and calculates the channel quality indication (CQI) information obtaining space one deck transmission according to described second signal to noise ratio side-play amount;

Described described channel quality indication (CQI) information is fed back to described base station before, also comprise:

Channel quality indication (CQI) information according to the two-layer transmission in described space calculates the throughput obtaining the two-layer transmission in space, and calculates the throughput obtaining one deck transmission of described space according to the channel quality indication (CQI) information of described space one deck transmission;

Described described channel quality indication (CQI) information is fed back to described base station, comprising:

When the throughput of the two-layer transmission in described space is greater than the throughput of space one deck transmission, the channel quality indication (CQI) information corresponding with the throughput of the two-layer transmission in described space is fed back to described base station.

3. process of signal transmission method according to claim 2, is characterized in that,

When the throughput of the two-layer transmission in described space is less than or equal to the throughput of space one deck transmission, then the channel quality indication (CQI) information corresponding with the throughput that described space one deck transmits is fed back to described base station.

4. the process of signal transmission method according to Claims 2 or 3, is characterized in that, the described channel quality indication (CQI) information calculating one deck transmission of acquisition space according to described second signal to noise ratio side-play amount, comprising:

Apply described second signal to noise ratio side-play amount and adjustment process is carried out to the signal to noise ratio that space one deck transmits, and obtain the channel quality indication (CQI) information of corresponding space one deck transmission according to the signal to noise ratio of the space one deck transmission after adjustment.

5. a Signal transmissions control method, is characterized in that, comprising:

The first signal to noise ratio side-play amount is sent to subscriber equipment;

Receive the channel quality indication (CQI) information of the two-layer transmission in space that described subscriber equipment obtains according to code book and described first signal to noise ratio side-play amount, described code book is comprised base station and selects and the code book issued by high-level signaling according to the antenna configuration of the antenna configuration of described base station and described subscriber equipment, or arrange with base station in advance and the code book stored, the antenna configuration of described base station and the antenna configuration of described subscriber equipment include the polarised direction of antenna;

Process of signal transmission is carried out according to described channel quality indication (CQI) information;

Wherein, the channel quality indication (CQI) information of the two-layer transmission in space that the described subscriber equipment of described reception obtains according to described code book and described first signal to noise ratio side-play amount, comprising:

Receive described subscriber equipment to calculate respectively according to described code book and obtain space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio, apply described first signal to noise ratio side-play amount and carry out adjusting process to described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio and the ground floor channel quality indication (CQI) information obtained according to the space ground floor transmission signal to noise ratio after adjustment and space second layer transmission signal to noise ratio and second layer channel quality indication (CQI) information.

6. Signal transmissions control method according to claim 5, it is characterized in that, also comprise: send the second signal to noise ratio side-play amount to subscriber equipment, calculate the channel quality indication (CQI) information obtaining space one deck transmission for described subscriber equipment according to described second signal to noise ratio side-play amount.

7. Signal transmissions control method according to claim 6, is characterized in that, the channel quality indication (CQI) information of the two-layer transmission in space that the described subscriber equipment of described reception obtains according to described code book and the first signal to noise ratio side-play amount, comprising:

During the throughput that space one deck that the throughput receiving the two-layer transmission in space that described subscriber equipment obtains according to the channel quality indication (CQI) information calculating of the two-layer transmission in described space is greater than the channel quality indication (CQI) information calculating acquisition that described subscriber equipment transmits according to described space one deck transmits, the channel quality indication (CQI) information of the two-layer transmission in space that described subscriber equipment feeds back.

8. Signal transmissions control method according to claim 7, it is characterized in that, when the throughput of the two-layer transmission in described space is less than or equal to the throughput of described space one deck transmission, receive the channel quality indication (CQI) information of space one deck transmission that described subscriber equipment sends.

9. the Signal transmissions control method according to claim arbitrary in claim 5 ~ 8, it is characterized in that, also comprise: the channel vector obtaining the up transmitting antenna of subscriber equipment, describedly carry out process of signal transmission according to described channel quality indication (CQI) information, comprising: carry out process of signal transmission according to described channel vector, described channel quality indication (CQI) information.

10. a subscriber equipment, is characterized in that, comprising:

First receiver module, for receiving the first signal to noise ratio side-play amount that base station sends;

Acquisition module, for according to code book and described first signal to noise ratio side-play amount, obtain the channel quality indication (CQI) information of the two-layer transmission in space, described code book is comprised base station and selects and the code book issued by high-level signaling according to the antenna configuration of the antenna configuration of described base station and subscriber equipment, or arrange with base station in advance and the code book stored, the antenna configuration of described base station and the antenna configuration of described subscriber equipment include the polarised direction of antenna;

First sending module, for described channel quality indication (CQI) information is fed back to described base station, carries out process of signal transmission for described base station according to described channel quality indication (CQI) information;

Wherein, described acquisition module comprises:

First acquiring unit, for according to described code book, calculates respectively and obtains space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio;

Second acquisition unit, for applying described first signal to noise ratio side-play amount, adjustment process is carried out to described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio, and obtain corresponding ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information according to the space ground floor transmission signal to noise ratio after adjustment and space second layer transmission signal to noise ratio;

Described first sending module is used for described ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information to feed back to described base station.

11. subscriber equipmenies according to claim 10, is characterized in that, described first receiver module also for receive described base station send the second signal to noise ratio side-play amount,

Described first acquiring unit is also for calculating the channel quality indication (CQI) information obtaining space one deck transmission according to described second signal to noise ratio side-play amount, channel quality indication (CQI) information according to the two-layer transmission in described space calculates the throughput obtaining the two-layer transmission in space, and the throughput obtaining one deck transmission of described space is calculated according to the channel quality indication (CQI) information of described space one deck transmission

Described first sending module is used for, when the throughput that the throughput of the two-layer transmission in described space is greater than space one deck transmission is large, the channel quality indication (CQI) information corresponding with the throughput of the two-layer transmission in described space being fed back to described base station.

12. subscriber equipmenies according to claim 11, it is characterized in that, described first sending module is also for being less than or equal to the throughput of space one deck transmission during when the throughput of the two-layer transmission in described space, the channel quality indication (CQI) information corresponding with the throughput that described space one deck transmits is fed back to described base station.

13. 1 kinds of base stations, is characterized in that, comprising:

Second sending module, for sending the first signal to noise ratio side-play amount to subscriber equipment;

Second receiver module, for receiving the channel quality indication (CQI) information of the two-layer transmission in space that described subscriber equipment obtains according to code book and described first signal to noise ratio side-play amount, described code book is comprised base station and selects and the code book issued by high-level signaling according to the antenna configuration of the antenna configuration of described base station and subscriber equipment, or arrange with base station in advance and the code book stored, the antenna configuration of described base station and the antenna configuration of described subscriber equipment include the polarised direction of antenna;

Wherein, the channel quality indication (CQI) information of the two-layer transmission in space that the described subscriber equipment of described reception obtains according to described code book and described first signal to noise ratio side-play amount, specifically comprise: receive described subscriber equipment and calculate acquisition space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio respectively according to described code book, apply described first signal to noise ratio side-play amount to carry out adjusting process to described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio and the ground floor channel quality indication (CQI) information obtained according to the space ground floor transmission signal to noise ratio after adjustment and space second layer transmission signal to noise ratio and second layer channel quality indication (CQI) information,

Processing module, for carrying out process of signal transmission according to described channel quality indication (CQI) information.

14. base stations according to claim 13, it is characterized in that, described second sending module, also for sending the second signal to noise ratio side-play amount to subscriber equipment, calculates the channel quality indication (CQI) information obtaining space one deck transmission according to described second signal to noise ratio side-play amount for described subscriber equipment.

15. 1 kinds of signal transmission systems, is characterized in that, comprise the base station described in claim 13 or 14.