CN101277135B - Method for a plurality of far-end radio frequency units to support single subdistrict - Google Patents

Abstract

The present invention discloses a method for supporting a cell by a plurality of remote radio frequency units (RRU). A baseband processing module is selected to be executed with a combination processing procedure of a plurality of ascending IQ signals according to the number of RRU and the resource occupation condition. When the number of RRU exceeds the number of resource of the baseband processing module, firstly a mode of IQ combining group by group is adopted to execute a totalizing combination procession to the IQ data, and then each group of IQ data after multiplex combination is inputted to a baseband processing module for executing a second step of combination receiving procession. When the method of the invention is adopted, the resource of the baseband processing module can be effectively increased, and the coverage of Cell and the capability of the subscribers supported by the Cell are increased.

Description

A kind of method of a plurality of far-end radio frequency units to support single subdistrict

Technical field

The present invention relates to the signal processing technology of wireless communication technology field remote radio unit (RRU) (RRU, Remote Radio Unit), relate in particular to the method for a kind of a plurality of far-end radio frequency units to support single subdistrict (Cell).

Background technology

In recent years; The framework development of wireless communication system is evolved into such trend gradually: with Base Band Unit (BBU; Base Band Unit) is separated with RRU; And, then RRU is placed on the place that each needs through using long-distance transmissions means such as optical fiber, cable that BBU and a plurality of RRU are coupled together.Said BBU comprises inphase quadrature (IQ) interface module, baseband processing module, coffret module, main control module and clock module again.The benefit of this framework is: improved the flexibility of networking on the one hand, reduced the maintenance cost of network on the other hand.

Fig. 1 is the networking mode sketch map between existing BBU and the RRU; Group-network construction as shown in Figure 1; If need be when using this framework networking with a plurality of RRU according to certain topological structure; As, Star network, Chain Network, ring network etc. connect mutually networking, and accomplish communicating by letter and the transmission of IQ data between BBU and a plurality of RRU on this basis.Here, said IQ data are the digital signal that is included in the IQ signal, and said IQ signal is the orthogonal signalling of spending from a pair of phase difference 90 that RRU receives.

Generally, a RRU supports a Cell that certain zone is covered independently, or through overloading mode frequently many Cell coverings is carried out in same zone.But in some cases; In order to enlarge the coverage of Cell; Particularly for the coverage under the coverage under complex environment, the complex-terrain environment in the expansion chamber and some the chain zone; And don't want to increase Radio Network System networking complexity, just need to use the common Cell of support of a plurality of RRU promptly to be placed into the different zone under this Cell to a plurality of RRU.In this case, on down direction, a plurality of RRU use identical descending IQ data; On up direction, a plurality of RRU carry out demodulation to the radiofrequency signal that receives jointly, and are converted into digital IQ signal, send said IQ signal to BBU respectively again and handle.

But, if will accomplish above-mentioned functions, also need solve the problem of following several aspects, as: need handle the shunt emission of descending IQ passage, the merging of up IQ passage receives to be handled; Wherein, the merging that also comprises total reception bandwidth power (RTWP, Received Total Wideband Power) being handled in the merging reception of up IQ passage handles.

Generally, the shunt of descending IQ passage emission can realize through the plain mode that directly duplicates the IQ data.

Reception processing to up IQ passage generally has dual mode:

Mode one: the up IQ signal of RRU is directly uploaded to baseband processing module; Baseband processing module is the up IQ signal of process multi-channel respectively; Promptly respectively the multichannel IQ signal of importing is carried out processing such as Multipath searching, descrambling and de-spreading, channel estimating, the final realization carried out multipath merging processing to the signal from different IQ passages.

Fig. 2 is the sketch map that closes road mode one of a sub-district of existing a plurality of RRU supports, and as shown in Figure 2, it is good that this mode has up receptivity index, the simple advantage of system configuration.But need take more baseband bandwidth resource, be difficult to support up IQ Signal Processing a greater number RRU.

Mode two: be input to baseband processing module again after the up IQ data of the multichannel of RRU are merged and handle in the IQ interface module.

Fig. 3 supports the sketch map that closes road mode two of a sub-district for existing a plurality of RRU; As shown in Figure 3; Though this mode has the advantage that does not take base-band resource, RRU that can support any number is owing to will carry out that the automatic gain control (AGC) of the IQ data after the merging of up IQ data is handled, merged is handled and the merging of RTWP is handled; Need carry out the complex mathematical computing between logarithm, index, evolution etc. and the linear numerical, this will take more hardware resource; In addition, because the increase that adds up and can bring the end to make an uproar of IQ channel, will inevitably influence the receptivity of up link, especially in the more IQ quantity that promptly need merge of the quantity of the RRU that is supported more for a long time, it is more outstanding that this problem can seem.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method of a plurality of far-end radio frequency units to support single subdistrict, with the resource utilization of raising baseband processing module, and increases the coverage of Cell and the user capacity that Cell is supported.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of a plurality of remote radio unit (RRU) RRU supports the method for single subdistrict, comprises that up IQ passage is merged reception to be handled, and merges the process that receives processing to up IQ passage and comprises:

A, when the quantity of RRU surpasses the resource quantity of baseband processing module, the mode of dividing into groups to adopt IQ to close the road is carried out linearisation multichannel accumulation process to the IQ data, and each road of extracting in said every group of IQ data always receives bandwidth power RTWP signal;

B, all the road RTWP signals in said every group of IQ data are carried out linear operation merge, and the IQ signal after linear operation merged carries out automatic gain control AGC and handles.

Wherein, before said step a, further comprise:

According to the quantity of RRU and the occupation condition of baseband processing module; When the quantity of RRU does not exceed the resource quantity of said baseband processing module; Directly up multichannel IQ signal is merged reception by said baseband processing module and handle, or up multichannel IQ signal is carried out merging the reception processing by said baseband processing module again after routine merges processing.

After the said step b, further comprise:

Said every group of IQ data after linear computing merges are input to baseband processing module merge the reception processing.

Wherein, the mode that the said grouping of step a adopts IQ to close the road is carried out linearisation multichannel accumulation process to the IQ data, comprising:

The data of the mn road IQ passage of a1, mn the RRU that at first will insert in advance are input in the IQ interface module, with n road IQ signal IQ ₁, IQ ₂..., IQ _nAdd up and be merged into IQ _S1N road IQ signal IQ _N+1, IQ _N+2..., IQ _2nAdd up and be merged into IQ _S2...; N road IQ signal IQ _{N (m-1)+1}, IQ _{N (m-1)+2}..., IQ _MnAdd up and be merged into IQ _Sm, so that with the m road IQ signal IQ after the said merging _S1, IQ _S2..., IQ _SmThe input baseband processing module.

The data of said mn road IQ passage with mn RRU are input to the IQ interface module and add up through multichannel and merge when handling the IQ extracting data RTWP signal after also need merging from said multichannel.

Said RTWP signal is expressed as R with decibel dBm _i, or be shown L with effective linear magnitudes table _i, or be expressed as Z with the form reciprocal of effective linear amplitude _i

Said every road IQ signal is reverted to the signal IQ ' of linear amplitude _i, be formulated as:

IQ′ _i＝IQ _i×L _i；

Wherein: IQi is the IQ data on the i road that reports of RRU; L _iBe RTWP value with effective linear amplitude numeric representation.

Signal IQ ' with the effective linear amplitude of multichannel _iSignal adds up, and obtains one and closes effective linear amplitude numerical signal IQ behind the road ", be formulated:

After total reception bandwidth power RTWP signal in the IQ data merged, the RTWP value R after obtaining merging _s, be formulated:

$R_s=100\×\log \left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{10}^{\frac{R_i}{100}}\right).$

RTWP value R after the said merging _sFurther be reduced to:

R _S＝R _MAX+K ₀-K ₁×(R′ ₁+R′ ₂+...+R′ _n-1)-K ₂×(R′ ₁ ²+R′ ₂ ²+...+R′ _n-1 ²)；

Wherein: R _MAXBe R _iMaximum, R _MAX=MAX (R ₁, R ₂..., R _n); R ' ₁, R ' ₂..., R ' _N-1Be respectively R _MAXWith R ₁, R ₂..., R _nThe difference of value; K ₀, K ₁, K ₂Be coefficient.

To add up according to effective linear amplitude from the RTWP value of each IQ passage, get inverse again, can obtain Z _s, be formulated:

$Z_S=\frac{1}{L_S}=\frac{1}{\sqrt{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{L_i}^2}}.$

Through said add up and represent with the inverse of the RTWP value after the linearisation after, Z _sFurther be reduced to:

Z _S＝Z _MAX(1-J ₁·Z _MAX·L′ ₁-J ₂·Z _MAX·L′ ₂-…-J _n-1·Z _MAX·L′ _n-1)；

Wherein: L _MAXBe L _iMaximum, L _MAX=MAX (L1, L2 ..., Ln); L ' ₁, L ' ₂..., L ' _N-1Be L _MAXWith L ₁, L ₂..., L _nDifference; J ₁, J ₂..., J _N-1Be coefficient.

Said AGC processing procedure is: " and the Z with IQ _sCarry out the phase multiplication, obtain AGC and handle IQ data I Q afterwards _s, be formulated:

IQ _s＝IQ″·Z _s；

Wherein: said IQ _sBe the m road IQ signal IQ after the said merging _S1, IQ _S2..., IQ _SmIn arbitrary road.

The method of a plurality of far-end radio frequency units to support single subdistrict provided by the present invention has the following advantages:

1) the present invention through classification adopt mode that IQ closes the road in the IQ interface module to the IQ data add up merge handle be the first order receive handle after; IQ data after again multichannel being merged are input to baseband processing module and carry out second level merging reception processing; Realized that more RRU supports the purpose of single Cell; And effectively saved the base-band resource of BBU, also overcome simultaneously and to take base-band resource under the single implementation that the IQ data accumulation merges and cause the shortcoming that the end makes an uproar and increase more.

2) the present invention is through being that the merging implementation of total reception bandwidth power (RTWP) signal of unit is converted into linear operation with calculating process through adopting approximate data with dBm; Overcome the operand that a large amount of logarithm, index and extracting operation brought when in the past merging the IQ data, and improved the precision of operation efficiency and operation result.

3) method proposed by the invention is not only applicable to the cdma system of distributed BBU and RRU structure, is suitable for the incorporate cdma base station system of base-band resource and remote radio unit (RRU), TD-SCDMA and WCDMA system too.

Description of drawings

Fig. 1 is the networking mode sketch map between existing BBU and the RRU;

Fig. 2 supports the sketch map that closes road mode one of a sub-district for existing a plurality of RRU;

Fig. 3 supports the sketch map that closes road mode two of a sub-district for existing a plurality of RRU;

Fig. 4 closes the processing procedure sketch map of road mode for up channel multichannel IQ in the embodiment of the invention;

Fig. 5 adds up to close and passes by the journey sketch map for three road IQ signals in the embodiment of the invention.

Embodiment

Below in conjunction with accompanying drawing and embodiments of the invention method of the present invention is done further detailed explanation.

Basic thought of the present invention is: according to the quantity of RRU and the occupation condition of baseband processing module; Be chosen in the merging processing that baseband processing module carries out up multichannel IQ signal; When the quantity of RRU surpasses the resource quantity of baseband processing module; At first the classification mode that adopts IQ to close the road adds up up multichannel IQ signal to merge and handles, and the IQ data after again multichannel being merged are input to baseband processing module and carry out the second level and merge to receive and handle.The negligible amounts of RRU under a sub-district; As; Be less than or when equaling the resource quantity of baseband processing module, just be employed in the mode that baseband processing module directly merges processing, each road IQ data all is input to baseband processing module; Said baseband processing module carries out multipath detection, despreading descrambling, channel estimating to each road IQ signal respectively, and finally realizes the processing such as merging and channel decoding of multipath; More when the quantity of the RRU that supports, and during more than the quantity of baseband processing module resource, the mode that unnecessary part adopts the IQ data to close the road is handled, wait to accomplish and close Lu Houzai and output to baseband processing module and handle.

Here, the effect of said baseband processing module is the basic functional principle of Rake (RAKE) receiver.

Fig. 4 closes the processing procedure sketch map of road mode for up channel multichannel IQ in the embodiment of the invention; As shown in Figure 4; Support that with mn RRU a sub-district is that example is described method of the present invention, after the data of the mn road IQ passage of mn RRU are input to BBU, n road IQ signal IQ ₁, IQ ₂..., IQ _nAdd up and be merged into IQ _S1IQ _N+1, IQ _N+2..., IQ _2nAdd up and be merged into IQ _S2...; IQ _{N (m-1)+1}, IQ _{N (m-1)+2}..., IQ _MnAdd up and be merged into IQ _SmM road IQ signal IQ after will merging then _S1, IQ _S2..., IQ _SmFinally being input to baseband processing module handles.

Each RRU under this Cell is going back synchronous driving RTWP signal to BBU when BBU transmits the IQ data, the RTWP signal is uploaded with following three kinds of forms, that is:

1) be unit with dBm, be designated as R, then the IQ signal RTWP that representes with dBm in i road is R _i

2) show with effective linear magnitudes table, be designated as L, then the IQ signal RTWP that shows with effective linear magnitudes table in i road is L _i

3) represent with the inverse of effective linear amplitude, be designated as Z, then the IQ signal RTWP that representes with the inverse of effective linear amplitude in i road is Z _i

The above R _iValue can promptly choose according to the value of the reporting mapping table of the RTWP of 3GPP R6TS25.133 agreement defined according to table one:

Table one:

The actual value of RTWP (dBm of unit)	The value of reporting of RTWP (R i)
		RTWP＜-112.0	000
-112.0≤RTWP＜-111.9	001
		-111.9≤RTWP＜-111.8	002
...	...
		-50.2≤RTWP＜-50.1	619
-50.1≤RTWP＜-50.0	620
		-50.0≤RTWP	621

After the IQ of BBU interface module receives the IQ signal, therefrom extract the RTWP signal, again the IQ signal is reverted to the signal of effective linear amplitude.

If the IQ data on the i road that RRU reports are IQ _i, the RTWP numerical value of its effective linear amplitude numeric representation is L _i, the IQ data that revert to linear amplitude are IQ ' _i, IQ ' then _iShown in (1):

IQ′ _i＝IQ _i×L _i (1)

And then with the IQ ' of multi-channel linear _iSignal adds up, and obtains one and closes behind the road effectively that the linear amplitude numerical signal is IQ ", IQ " shown in (2):

${\mathrm{IQ}}^{\′\′}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{\mathrm{IQ}}_i^{\′}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{\mathrm{IQ}}_i\·L_i---\left(2\right)$

Simultaneously, the RTWP signal from each IQ passage is added up according to following formula, obtain R _s, shown in (3):

$R_s=100\×\log \left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{10}^{\frac{R_i}{100}}\right)---\left(3\right)$

But, calculate and design process in order to simplify, can adopt following approximate data to calculate R _S, its step is following:

At first, try to achieve R _iMaximum R _MAX, shown in (4):

R _MAX＝MAX(R ₁，R ₂，...，R _n)；(4)

Secondly, calculate this maximum R respectively _MAXWith R ₁, R ₂..., R _nThe difference of value, wherein difference is greater than 200 calculate by 200; Here, suppose that the data that obtain are respectively R ' ₁, R ' ₂..., R ' _N-1

At last, try to achieve R according to following formula _S, shown in (5):

R _S＝R _MAX+K ₀-K ₁×(R′ ₁+R′ ₂+...+R′ _n-1)-K ₂×(R′ ₁ ²+R′ ₂ ²+...+R′ _n-1 ²) (5)

Wherein: K ₀, K ₁, K ₂Be coefficient, get different values according to the difference of n.

In like manner, can obtain representing Z with the inverse of effective linear amplitude _S, its computing formula is suc as formula shown in (6):

$Z_S=\frac{1}{L_S}=\frac{1}{\sqrt{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{L_i}^2}}---\left(6\right)$

To calculate and design process in order simplifying, also can to adopt following approximate data to calculate Z formula (6) _S, its step is following:

At first, try to achieve L _iMaximum, shown in (7):

L _MAX＝MAX(L ₁，L ₂，...，L _n) (7)

Secondly, to L _MAXOutside L _iCarry out descending ordering, suppose that arranging good order is L ' ₁, L ' ₂..., L ' _N-1

At last, try to achieve Z according to following formula _s, shown in (8):

Z _S＝Z _MAX(1-J ₁·Z _MAX·L’ ₁-J ₂·Z _MAX·L’ ₂-…-J _n-1·Z _MAX·L’ _n-1) (8)

Wherein: J ₁, J ₂..., J _N-1Be coefficient, get different values according to the difference of n.

Its AGC processing procedure is: " and the Z with IQ _sCarry out the phase multiplication, obtain AGC IQ data I Q afterwards _s, promptly suc as formula shown in (9):

IQ _S＝IQ″·Z _S (9)

A sub-district with WCDMA (WCDMA) system is an example below: need to suppose 9 RRU to come common this sub-district of supporting; But principle according to the configuration and optimization of system; Current base-band resource can only be supported the Signal Processing of three sub-districts, and then need merge the three road up IQ signals from three RRU this moment.The maximum resource disposal ability that said current base-band resource is a baseband processing module.

In the side of RRU, in order the RTWP signal to be delivered to fast BBU one side, can also transmit RTWP information with paths through being provided with, this information is delivered to BBU together in company with the IQ passage, transmits through the lowest order (bit) that utilizes the IQ passage.

Here, said RTWP information is the descriptive information of indication RTWP signal(l)ing condition.

With dBm is the RTWP of unit representation, can adopt the transformat of the value of reporting mapping table of the Iub interface of 3GPP TS25.133 agreement defined to represent, promptly changes according to table one.

So, effective linear amplitude L _iWith R _iBetween can adopt following formula to change:

$L_i=\mathrm{int}[50\×{10}^{\frac{R_i}{200}}]$

Z then _iCan be expressed as: $Z_i=\frac{1}{L_i}=0.02\×{10}^{\frac{R_i}{200}};$

For the convenience of expressing Yu transmit, following formula can be revised as:

$Z_i=\mathrm{int}\left[\frac{2^{20}}{L_i}\right]=\mathrm{int}[20971.52\×{10}^{\frac{R_i}{200}}]$

Then corresponding to R _i=[0,1 ..., 621]; Calculate through following formula, and final round numbers as a result obtained:

L _i＝[50，51，...，63675]；Z _i＝[20972，20731，...，16]。

Here, said three groups of numerical value are R _i, L _i, Z _iUse 16 bit data to represent and transmission respectively.

Below RTWP merging and AGC processing procedure among Fig. 4 are described in detail:

Fig. 5 adds up to close and passes by the journey sketch map for three road IQ signals in the embodiment of the invention; As shown in Figure 5; Closing in BBU passed by journey and is made up of following each function combinations, comprises RTWP extraction, linearization process, adds up, is merging and the AGC processing procedure etc. of the Zi of the RTWP of the unit RTWP that merges, represent with the inverse of effective linear amplitude with dBm.Said AGC handles and comprises through multiplier and cut position processing.

Said RTWP extracts, and is the process of extracting the RTWP signal from the passage of transmission IQ signal, comprises with R _i, effective linear amplitude L _i, the effective Z reciprocal of linear amplitude _iRepresent respectively.

Said linearization process is with IQ _iData and L _iMultiply each other, promptly obtain the process of normalized, linear IQ data;

It is normalized, the linear IQ data accumulation of Jiang Sanlu with the process of the IQ data that obtain closing the road that said multichannel adds up.

R _iMerging is to be the merging work of the RTWP of unit in order to accomplish three the tunnel with dBm.

Suppose IQ ₁, IQ ₂, IQ ₃RTWP numerical value be respectively R ₁, R ₂, R ₃,

Wherein: R _MAX=MAX (R ₁, R ₂, R ₃)

R ' then ₁, R ' ₂Be respectively R _MAXPoor with two other less numerical value is greater than 200 calculate according to 200.

According to the way that adds up, confirm to adopt following parameter to carry out adding up of RTWP:

K ₀＝48，K ₁＝0.3，K ₂＝0.001；

So obtain:

R _S＝R _MAX+48-0.3(R′ ₁+R′ ₂)-0.001(R′ ₁ ²+R′ ₂ ²)。

Zi merge to accomplish three the tunnel with effective linear amplitude and expression reciprocal thereof the merging work of RTWP.

Suppose IQ ₁, IQ ₂, IQ ₃Effective linear amplitude numerical value be respectively L ₁, L ₂, L ₃, the inverse of its effective linear amplitude is respectively Z ₁, Z ₂, Z ₃, wherein:

L _MAX＝MAX(L ₁，L ₂，L ₃)；

L ' then ₁, L ' ₂Be respectively two other less numerical value.

According to the way that adds up, we confirm to adopt following parameter to carry out adding up of RTWP:

K ₁=0.25; K ₂=0.125; Then:

$Z_S=Z_S\&CenterDot;(1-0.25\frac{Z_S\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="S2008100946963E00011.png,S2008100946963E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^{\&prime;}}{2^{20}}-0.125\frac{Z_S\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="S2008100946963E00011.png,S2008100946963E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_2^{\&prime;}}{2^{20}})$

${=Z}_S\&CenterDot;(1-\frac{Z_S\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="S2008100946963E00011.png,S2008100946963E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^{\&prime;}}{2^{22}}-\frac{Z_S\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="S2008100946963E00011.png,S2008100946963E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_2^{\&prime;}}{2^{23}})$

It is with the IQ that obtains that AGC handles _sDirect and the Z of signal _sMultiply each other, and then carry out cut position and handle, directly handle getting final product according to following formula.Here, said cut position is handled and is meant that the transformation of variables that resulting binary code is long is the process of short number of code length.For example: the number that 24bit is long is handled through cut position and is transformed to 8bit.

The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.

Claims (13)

1. the method for a plurality of remote radio unit (RRU) RRU support single subdistricts comprises that up inphase quadrature IQ passage is merged reception to be handled, and it is characterized in that, up IQ passage is merged the process that receives processing comprise:

A, when the quantity of RRU surpasses the resource quantity of baseband processing module, the mode of dividing into groups to adopt IQ to close the road is carried out linearisation multichannel accumulation process to the IQ data, and each road of extracting in said every group of IQ data always receives bandwidth power RTWP signal;

B, all the road RTWP signals in said every group of IQ data are carried out linear operation merge, and the IQ signal after linear operation merged carries out automatic gain control AGC and handles.

2. method according to claim 1 is characterized in that, before the said step a, further comprises:

According to the quantity of RRU and the occupation condition of baseband processing module; When the quantity of RRU does not exceed the resource quantity of said baseband processing module; Directly up multichannel IQ signal is merged reception by said baseband processing module and handle, or up multichannel IQ signal is carried out merging the reception processing by said baseband processing module again after routine merges processing.

3. method according to claim 1 is characterized in that, after the said step b, further comprises:

Said every group of IQ data after linear computing merges are input to baseband processing module merge the reception processing.

4. method according to claim 1 is characterized in that, the mode that the said grouping of step a adopts IQ to close the road is carried out linearisation multichannel accumulation process to the IQ data, comprising:

The data of the mn road IQ passage of a1, mn the RRU that at first will insert in advance are input in the IQ interface module, with n road IQ signal IQ ₁, IQ ₂..., IQ _nAdd up and be merged into IQ _S1N road IQ signal IQ _N+1, IQ _N+2..., IQ _2nAdd up and be merged into IQ _S2...; N road IQ signal IQ _{N (m-1)+1}, IQ _{N (m-1)+2}..., IQ _MnAdd up and be merged into IQ _Sm, so that with the m road IQ signal IQ after the said merging _S1, IQ _S2..., IQ _SmThe input baseband processing module.

5. method according to claim 4 is characterized in that, the data of said mn road IQ passage with mn RRU are input to the IQ interface module and add up through multichannel and merge when handling the IQ extracting data RTWP signal after also need merging from said multichannel.

6. method according to claim 5 is characterized in that, said RTWP signal is expressed as R with decibel dBm _i, or be shown L with effective linear magnitudes table _i, or be expressed as Z with the form reciprocal of effective linear amplitude _i

7. according to claim 4,5 or 6 described methods, it is characterized in that, said every road IQ signal is reverted to the signal IQ ' of linear amplitude _i, be formulated as:

IQ′ _i＝IQ _i×L _i；

Wherein: IQ _iThe IQ data on the i road that reports for RRU; L _iBe RTWP value with effective linear amplitude numeric representation.

8. method according to claim 7 is characterized in that, with the signal IQ ' of the effective linear amplitude of multichannel _iSignal adds up, and obtains one and closes effective linear amplitude numerical signal IQ behind the road ", be formulated:

${\mathrm{IQ}}^{\&prime;\&prime;}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{{\mathrm{IQ}}_i}^{\&prime;}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{\mathrm{IQ}}_i\&CenterDot;L_i.$

9. method according to claim 6 is characterized in that, after the total reception bandwidth power RTWP signal in the IQ data is merged, and the RTWP value R after obtaining merging _s, be formulated:

$R_s=100\&times;\log \left(\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{10}^{\frac{R_i}{100}}\right).$

10. method according to claim 9 is characterized in that, the RTWP value R after the said merging _sFurther be reduced to:

R _S＝R _MAX+K ₀-K ₁×(R′ ₁+R′ ₂+...+R′ _n-1)-K ₂×(R′ ₁ ²+R′ ₂ ²+...+R′ _n-1 ²)；

Wherein: R _MAXBe R _iMaximum, R _MAX=MAX (R ₁, R ₂..., R _n); R ' ₁, R ' ₂..., R ' _N-1Be respectively R _MAXWith R ₁, R ₂..., R _nThe difference of value; K ₀, K ₁, K ₂Be coefficient.

11. according to Claim 8 or 10 described methods, it is characterized in that, will add up according to effective linear amplitude, get inverse again, can obtain Z from the RTWP value of each IQ passage _s, be formulated:

$Z_S=\frac{1}{L_S}=\frac{1}{\sqrt{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{L_i}^2}}.$

12. method according to claim 11 is characterized in that, through said add up and represent with the inverse of the RTWP value after the linearisation after, Zs further is reduced to:

Z _S＝Z _MAX(1-J ₁·Z _MAX·L′ ₁-J ₂·Z _MAX·L′ ₂-…-J _n-1·Z _MAX·L′ _n-1)；

Wherein: L _MAXBe L _iMaximum, L _MAX=MAX (L ₁, L ₂..., L _n); L ' ₁, L ' ₂..., L ' _N-1Be L _MAXWith L ₁, L ₂..., L _nDifference; J ₁, J ₂..., J _N-1Be coefficient.

13. method according to claim 12 is characterized in that, said AGC processing procedure is: " and the Z with IQ _sCarry out the phase multiplication, obtain AGC and handle IQ data I Q afterwards _s, be formulated:

IQ _s＝IQ″·Z _s；

Wherein: said IQ _sBe the m road IQ signal IQ after the said merging _S1, IQ _S2..., IQ _SmIn arbitrary road.

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