CN103795437B - The method and apparatus for selecting multidiameter - Google Patents
The method and apparatus for selecting multidiameter Download PDFInfo
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- CN103795437B CN103795437B CN201210428050.0A CN201210428050A CN103795437B CN 103795437 B CN103795437 B CN 103795437B CN 201210428050 A CN201210428050 A CN 201210428050A CN 103795437 B CN103795437 B CN 103795437B
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Abstract
The invention discloses a kind of method and apparatus for selecting multidiameter, methods described includes carrying out Multipath searching to targeted customer and interference user respectively, obtains multipath relevant information；The energy footpath information containing targeted customer's signal energy and the energy footpath information of interference subscriber signal energy that are obtained according to search carry out the multidiameter selection of targeted customer.Using the method for the invention and device, compared with prior art, selected multidiameter can more play the performance of senior receiver, preferably suppress interference, improve the SINR after merging, and reduce the bit error rate of receiver.
Description
Technical field
The present invention relates to CDMA（Code Division Multiple Access, CDMA）Band receiver of base technology
Multipath distribution in field, with Rake Rake receivers is especially relevant, it is more particularly related to which a kind of selection multipath prolongs
Method and apparatus that are slow and being allocated.
Background technology
In CDMA systems, Rake receivers are widely used.As shown in figure 1, Rake receivers first have to
Energy path search is carried out to signal, finds the multi-path location for having signal energy, then by the reception signal of these multi-path locations point
Dispensing descrambling and de-spreading unit carries out descrambling and de-spreading, and the symbol after descrambling and de-spreading finally is carried out into maximum-ratio combing, can so as to obtain
For the soft symbol adjudicated or decoded.
With the development of receiver technology, the more superior senior receiver of performance also begins to be applied to real system,
Such as MMSE（Minimum Mean Square Error, least mean-square error）, GRAKE（General Rake, general Rake）
Receiver etc..
For Rake receivers, the multi-path location of distribution is generally all containing signal energy, and is connect for advanced
For receipts machine, multi-path location can not include signal energy, and only include interfering energy.Generally, to containing the more of signal energy
Footpath is referred to as energy footpath, is referred to as noise path to the multipath that interfering energy is comprised only without signal energy.With continued reference to Fig. 1,
Energy path search and the result of noise path selection are all assigned to descrambling and de-spreading unit, and senior receiver is by merging these energy
The descrambling and de-spreading symbol of footpath and noise path obtains the signal energy of maximum, while suppresses to disturb, it is hereby achieved that compared to
Rake receiver better performances.
However, either Rake receivers or senior receiver, under the premise of receiver algorithm identical, point of multipath
Match somebody with somebody, including energy footpath and noise path, final systematic function can be influenceed and receive bit error rate of symbol etc..Because such as
The selection of fruit energy footpath is suitable, then can collect signal energy to greatest extent；If noise path selection is suitable, can be with maximum journey
Degree ground suppresses interference, so, the selecting module for selecting multidiameter is to be related to the important module of systematic function, therefore, how
A kind of method for selecting multidiameter is provided, farthest to collect signal energy and suppress to disturb, become in order to current
One problem of urgent need to resolve.
The content of the invention
It is advanced so as to can not farthest play in order to overcome the selection of multidiameter present in prior art improper
The problem of receiver performance and defect, it is an object of the invention to provide it is a kind of select multidiameter method and apparatus, to
Obtain more preferable systematic function, and lower reception symbol error rate.
In order to reach the purpose of the present invention, the present invention is realized using following technical scheme：
A kind of method for selecting multidiameter, including：
A, Multipath searching is carried out to targeted customer and interference user respectively, obtains multipath relevant information；
B, the energy footpath information containing targeted customer's signal energy and interference subscriber signal energy obtained according to search
Energy footpath information carry out the multidiameter selection of targeted customer.
Preferably, in the step A, the Multipath searching refers to the search to energy footpath, the multipath relevant information
The signal energy size included including the delay of energy footpath with every footpath.
Preferably, in the step B, the multidiameter selection of targeted customer includes selecting energy footpath with selecting noise
Footpath, the rwo collectively forms the multidiameter of final choice.
Preferably, when performing the step B, energy footpath system of selection includes：
C, the energy footpath of targeted customer is selected, can not be to it when its signal energy is less than a predetermined threshold value
Merge.
Preferably, when performing the step B, the noise path system of selection includes：
D, according to the noise path for the principle selection target user for suppressing to disturb between multipath.
Preferably, included according to the step of noise path for the principle selection target user for suppressing to disturb between multipath：
The multipath of D1, the energy footpath of selection target user as potential merging, and it is del_ef to make its delay；
D2, one is selected from interference multipath, it is del_int to make its delay, wherein, the interference multipath refers to except described
The energy footpath in other targeted customer's energy footpaths and all interference users outside the energy footpath of the targeted customer chosen, it is all right
Disturbed between choosing multipath and having footpath；
D3, a noise path is produced to suppress the interference of interference multipath；
D4, the final merging of a part of noise path participation is selected based at least one criterion.
Preferably, in the step D3, produce one and wrapped to suppress to disturb the step of the noise path of the interference of multipath
Include：
D31, a multipath is selected to make its delay as benchmark multipath from the energy footpath of targeted customer and interference user
For del_lp；
D32, according to following mathematical expression, obtain the delay del_nf in target noise footpath：
del_nf = del_ef+order*(del_lp-del_int)；
Wherein, order is the integer more than 0, represents to produce the exponent number of noise path.
Preferably, in the step D3, in addition to：
D33, when order=1, and benchmark multipath is when choosing energy footpath, now to there is del_lp=del_ef, then according to such as
Lower mathematical expression obtains the delay del_nf in target noise footpath：
del_nf = 2*del_lp-del_int ；
That is noise path del_nf and interference multipath del_int are closed for the energy footpath del_ef chosen into symmetrical
System.
Preferably, in the step D4, the criterion includes：
1）Noise path caused by the big energy footpath of energy is preferential；
2）Noise path caused by the big interference footpath of energy is preferential；
3）Noise path caused by the big benchmark footpath of energy is preferential；
4）Noise path small Order is preferential；
5）Two footpaths that multidiameter interval is less than certain threshold value only take one.
A kind of device for selecting multidiameter, including：
Targeted customer's Multipath searching module, for carrying out Multipath searching to targeted customer, obtain multipath relevant information；
User's Multipath searching module is disturbed, for carrying out Multipath searching to interference user, obtains multipath relevant information；
Targeted customer's multidiameter selecting module, for the energy containing targeted customer's signal energy obtained according to search
Footpath information and the energy footpath information of interference subscriber signal energy carry out the multidiameter selection of targeted customer.
Preferably, the Multipath searching refers to the search to energy footpath, and the multipath relevant information postpones including energy footpath
The signal energy size included with every footpath.
Preferably, multidiameter selection of targeted customer's multidiameter selecting module to targeted customer includes selecting energy footpath
With selecting noise path, the rwo collectively forms the multidiameter of final choice.
Preferably, targeted customer's multidiameter selecting module is additionally operable to select the energy footpath of targeted customer, when it
When signal energy is less than a predetermined threshold value, it can not be merged.
Preferably, targeted customer's multidiameter selecting module is additionally operable to according to the principle selection target for suppressing to disturb between multipath
The noise path of user.
Preferably, targeted customer's multidiameter selecting module is according to the principle selection target user's for suppressing to disturb between multipath
The step of noise path, includes：
1）Multipath of the energy footpath of selection target user as potential merging, and it is del_ef to make its delay；
2）One is selected from interference multipath, it is del_int to make its delay, wherein, the interference multipath refers to except described
The energy footpath in other targeted customer's energy footpaths and all interference users outside the energy footpath of the targeted customer chosen, it is all right
Disturbed between choosing multipath and having footpath；
3）A noise path is produced to suppress the interference of interference multipath；
4）A part of noise path is selected based at least one criterion and participates in final merging.
Preferably, produce one includes to suppress to disturb the step of the noise path of the interference of multipath：
1）From targeted customer and disturb in the energy footpath of user and select a multipath as benchmark multipath, make its delay be
del_lp；
2）According to following mathematical expression, the delay del_nf in acquisition target noise footpath：
del_nf = del_ef+order*(del_lp-del_int)；
Wherein, order is the integer more than 0, represents to produce the exponent number of noise path.
Preferably, when order=1, and benchmark multipath is when choosing energy footpath, now to there is del_lp=del_ef, then according to
The delay del_nf in target noise footpath is obtained according to following mathematical expression：
del_nf = 2*del_lp-del_int ；
That is noise path del_nf and interference multipath del_int are closed for the energy footpath del_ef chosen into symmetrical
System.
Preferably, the criterion includes：
1）Noise path caused by the big energy footpath of energy is preferential；
2）Noise path caused by the big interference footpath of energy is preferential；
3）Noise path caused by the big benchmark footpath of energy is preferential；
4）Noise path small Order is preferential；
5）Two footpaths that multidiameter interval is less than certain threshold value only take one.
It is can be seen that by the technical scheme of the invention described above using the method for the invention and device, with prior art
Compare, selected multidiameter can more play the performance of senior receiver, preferably suppress interference, improve the SINR after merging
（Signal to Interference plus Noise Ratio, Signal Interference and Noise Ratio）, reduce the bit error rate of receiver.
Brief description of the drawings
Fig. 1 illustrates the general structure of existing band spread receiver, i.e. multidiameter selection and distribution, descrambling and de-spreading, more
Footpath merges, Decision Decoding；
Fig. 2 illustrates the Module Division of the device of selection multidiameter provided in an embodiment of the present invention, can substantially be divided into
Targeted customer's Multipath searching module, interference user's Multipath searching module and targeted customer's multidiameter selecting module；
Fig. 3 illustrates the method implementation process of selection multidiameter provided in an embodiment of the present invention, includes the choosing in energy footpath
Select the generation with noise path；
Fig. 4 illustrates to produce the method flow of noise path in the embodiment of the present invention based on the principle for suppressing to disturb between footpath；
Fig. 5 illustrates the generation flow of noise path in the embodiment of the present invention；
Fig. 6 illustrates a kind of method flow for selection multidiameter that the embodiment of the present invention 1 provides, by multipath energy
Sort to select noise path；
Fig. 7 illustrates a kind of method flow for selection multidiameter that the embodiment of the present invention 2 provides, by being made an uproar to each
Sound footpath assigns a weight, selects the larger noise path of a number of weight and participates in final merging.
The realization, functional characteristics and excellent effect of the object of the invention, below in conjunction with specific embodiment and accompanying drawing do into
The explanation of one step.
Embodiment
Technical scheme of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that this
The technical staff in field can be better understood from the present invention and can be practiced, but illustrated embodiment is not as the limit to the present invention
It is fixed.
In the present invention, Multipath searching is carried out to targeted customer and interference user respectively, obtains multipath relevant information.Here
Targeted customer i.e. be benefited user.Multipath searching refers to the search to energy footpath, can be the relevant search based on known array.
After Multipath searching, the energy footpath information containing targeted customer's signal energy is obtained, with containing interference subscriber signal energy
Energy footpath information.This patent proposes to carry out the multidiameter of targeted customer with interference user's energy footpath information based on targeted customer
Selection, the result of selection can directly carry out multipath distribution.
Because the multidiameter selection of targeted customer considers the energy footpath information of interference user, such multipath distribution makes
Obtaining senior receiver can suppress to disturb user's energy with autotelic, improve targeted customer's demodulation performance.When interference user's energy
Account for total interference plus white noise ratio it is higher when, this method gain becomes apparent.
A kind of method for selecting multidiameter provided in an embodiment of the present invention, comprises the following steps：
S10, Multipath searching is carried out to targeted customer and interference user respectively, obtain multipath relevant information；
S20, the energy footpath information containing targeted customer's signal energy obtained according to search and interference subscriber signal energy
The energy footpath information of amount carries out the multidiameter selection of targeted customer.
In the present embodiment, in the step S10, the Multipath searching refers to the search to energy footpath, the multipath phase
Closing information includes the signal energy size that the delay of energy footpath is included with every footpath.
In the step S20, the multidiameter selection of targeted customer includes selecting energy footpath and selection noise path, and this two
Person collectively forms the multidiameter of final choice.
When performing the step S20, energy footpath system of selection includes：
S30, the energy footpath to targeted customer select, can not be right when its signal energy is less than a predetermined threshold value
It is merged.
When performing the step S30, the noise path system of selection includes：
S40, the noise path according to the principle selection target user for suppressing to disturb between multipath.
In step S40, included according to the step of noise path for the principle selection target user for suppressing to disturb between multipath：
The multipath of S401, the energy footpath of selection target user as potential merging, and it is del_ef to make its delay；
S402, one is selected from interference multipath, it is del_int to make its delay, wherein, the interference multipath refers to remove institute
Other targeted customer's energy footpaths outside the energy footpath of the targeted customer chosen and the energy footpath of all interference users are stated, it is all
Being disturbed choosing multipath to have footpath；
S403, a noise path is produced to suppress the interference of interference multipath；
S404, the final merging of a part of noise path participation is selected based at least one criterion.
In the step S403, produce one includes to suppress to disturb the step of the noise path of the interference of multipath：
S4031, a multipath is selected to make it prolong as benchmark multipath from the energy footpath of targeted customer and interference user
It is late del_lp；
S4032, according to following mathematical expression, obtain the delay del_nf in target noise footpath：
del_nf = del_ef+order*(del_lp-del_int)；
Wherein, order is the integer more than 0, represents to produce the exponent number of noise path.
Preferably, in the step S403, in addition to：
S4033, when order=1, and benchmark multipath is when choosing energy footpath, now to have del_lp=del_ef, then foundation
Following mathematical expression obtains the delay del_nf in target noise footpath：
del_nf = 2*del_lp-del_int ；
That is noise path del_nf and interference multipath del_int are closed for the energy footpath del_ef chosen into symmetrical
System.
In the step S404, the criterion includes：
1）Noise path caused by the big energy footpath of energy is preferential；
2）Noise path caused by the big interference footpath of energy is preferential；
3）Noise path caused by the big benchmark footpath of energy is preferential；
4）Noise path small Order is preferential；
5）Two footpaths that multidiameter interval is less than certain threshold value only take one.
For example, in a specific embodiment, described targeted customer's multidiameter system of selection includes step in detail below：
Step 1：Multipath searching is carried out to targeted customer and interference user first, obtains corresponding energy footpath information.
Step 2：Targeted customer's multipath is carried out according to the targeted customer that step 1 is obtained with interference user's energy footpath information to prolong
Selection late.The selection of targeted customer's multidiameter is divided into two parts, energy footpath and selection noise path is selected, as shown in figure 3, this two
Divide the multidiameter for collectively forming final choice.
Step 3：According to step 2, the energy footpath of targeted customer is selected, what energy was less than certain predetermined threshold value can be with
Without merging.
Step 4：Such as Fig. 4, according to step 2, according to the noise path for the principle selection target user for suppressing to disturb between multipath, have
Body step is as follows：
Step 4a：Multipath of the energy footpath of selection target user as potential merging.It is del_ef to make its delay, such as
Shown in Fig. 5, two energy footpaths of targeted customer, three energy footpaths of interference user, wherein, the serial number " 1 " in the energy footpath chosen.
Step 4b：Other targeted customer's energy footpaths in addition to energy footpath is chosen, and the energy footpath of all interference users
All being disturbed choosing multipath to have footpath.One in these interference multipaths is selected, it is del_int to make its delay, as shown in figure 5,
The serial number " 5 " in the interference footpath chosen.
Step 4c：A noise path is produced to suppress the interference of interference multipath, for example, production method is as follows：
（1）From targeted customer, disturb in the energy footpath of user and select a multipath as benchmark multipath, make its delay be
Del_lp, as shown in figure 5, the benchmark multipath serial number " 3 " chosen
（2）The delay del_nf of noise path is：
Del_nf=del_ef+order* (del_lp-del_int) formula one；
Wherein, order is the integer more than 0, represents to produce the exponent number of noise path.Such as Fig. 5, order=1, serial number is produced
The noise path of " 6 ".
（3）When order=1, when benchmark multipath is the energy footpath chosen, i.e. del_lp=del_ef, formula one deteriorates to：
Del_nf=2*del_lp-del_int formula two；
That is noise path del_nf and interference multipath del_int is on the energy footpath del_ef that chooses into symmetric relation.
Step 4d：The pairing situation of potential combining energy footpath and interference multipath can be a lot, and caused noise path also has a lot,
Need to select the final merging of a part of noise path participation based on certain criterion, wherein the criterion is as follows：
1）Noise path caused by the big energy footpath of energy is preferential；
2）Noise path caused by the big interference footpath of energy is preferential；
3）Noise path caused by the big benchmark footpath of energy is preferential；
4）Noise path small Order is preferential；
5）Two footpaths that multidiameter interval is less than certain threshold value only take one.
The embodiment of the present invention additionally provides a kind of device for selecting multidiameter, including：
Targeted customer's Multipath searching module, for carrying out Multipath searching to targeted customer, multipath relevant information is obtained, its
In, the Multipath searching refers to the search to energy footpath, and the multipath relevant information includes the delay of energy footpath and wrapped with every footpath
The signal energy size contained.
User's Multipath searching module is disturbed, for carrying out Multipath searching to interference user, obtains multipath relevant information；
Targeted customer's multidiameter selecting module, for the energy containing targeted customer's signal energy obtained according to search
Footpath information and the energy footpath information of interference subscriber signal energy carry out the multidiameter selection of targeted customer.
Multipath searching module provides information for the selection of targeted customer's multidiameter, includes the energy of targeted customer and interference user
Measure footpath information.
And targeted customer's multidiameter selecting module then considers targeted customer with disturbing the energy footpath information of user to enter
Row targeted customer multidiameter selects, farthest to play the performance of senior receiver.Targeted customer is considered with doing
The multidiameter of the energy footpath information selection target user of user is disturbed, if the multi-path location of selection contains targeted customer's signal energy
It is then energy footpath, is noise path if not containing.Energy footpath is required for carrying out descrambling and de-spreading with noise path, finally according to certain
Merge weight and carry out symbol merging.
Specifically, multidiameter selection of targeted customer's multidiameter selecting module to targeted customer includes selecting energy footpath
With selecting noise path, the rwo collectively forms the multidiameter of final choice.
Targeted customer's multidiameter selecting module is additionally operable to select the energy footpath of targeted customer, when its signal energy
During less than a predetermined threshold value, it can not be merged.
In addition, targeted customer's multidiameter selecting module is additionally operable to be used according to the principle selection target for suppressing to disturb between multipath
The noise path at family.
Specifically, targeted customer's multidiameter selecting module is according to the principle selection target user's for suppressing to disturb between multipath
The step of noise path, includes：
1）Multipath of the energy footpath of selection target user as potential merging, and it is del_ef to make its delay；
2）One is selected from interference multipath, it is del_int to make its delay, wherein, the interference multipath refers to except described
The energy footpath in other targeted customer's energy footpaths and all interference users outside the energy footpath of the targeted customer chosen, it is all right
Disturbed between choosing multipath and having footpath；
3）A noise path is produced to suppress the interference of interference multipath；
4）A part of noise path is selected based at least one criterion and participates in final merging.
Wherein, produce one includes to suppress to disturb the step of the noise path of the interference of multipath：
1）From targeted customer and disturb in the energy footpath of user and select a multipath as benchmark multipath, make its delay be
del_lp；
2）According to following mathematical expression, the delay del_nf in acquisition target noise footpath：
del_nf = del_ef+order*(del_lp-del_int)；
Wherein, order is the integer more than 0, represents to produce the exponent number of noise path.
When it is implemented, work as order=1, and benchmark multipath is when choosing energy footpath, now to there is del_lp=del_ef,
The delay del_nf in target noise footpath is then obtained according to following mathematical expression：
del_nf = 2*del_lp-del_int ；
That is noise path del_nf and interference multipath del_int are closed for the energy footpath del_ef chosen into symmetrical
System.
In addition, the criterion for selecting the final merging of a part of noise path participation includes：
1）Noise path caused by the big energy footpath of energy is preferential；
2）Noise path caused by the big interference footpath of energy is preferential；
3）Noise path caused by the big benchmark footpath of energy is preferential；
4）Noise path small Order is preferential；
5）Two footpaths that multidiameter interval is less than certain threshold value only take one.
Example 1：
As shown in fig. 6, a kind of method of multidiameter selection has been illustrated in it, by sorting multipath energy to select
Noise path, comprise the following specific steps that：
The first step：Targeted customer is obtained with disturbing the energy footpath information of user, including the delay of energy footpath, affiliated antenna and bag
Energy content size.
Second step：The signal energy contained according to multipath is ranked up to multipath.Here sequence does not differentiate between user, not area
Divided antenna, only energy is carried out to small sequence, a certain bar multipath owning user after sequence, affiliated antenna still need certainly greatly
It is one-to-one.
3rd step：If exponent number is order, the effect that the higher caused noise path of exponent number suppresses interference is poorer, so first
The noise path of order=1 is first searched for, then searches for the noise path of order=2, by that analogy.
4th step：Make according to containing targeted customer's signal energy order from big to small successively selection target user energy footpath
For a potential merging multipath, multidiameter is designated as del_ef.
5th step：All multipaths merged on the affiliated antenna of multipath are traveled through according to energy size, this multipath are regarded as dry
Multipath is disturbed, multidiameter is designated as del_int.Interference multipath can come from targeted customer, can be from interference user, and energy is big
Interference multipath need priority treatment.
6th step：Disinthibited with a certain bar multipath of interference multipath owning user and disturb multipath, the delay in this benchmark footpath
It is designated as del_lp.This footpath can be the ceiling capacity footpath or interference for disturbing multipath owning user on affiliated antenna
The ceiling capacity footpath of multipath owning user or other multipaths.
7th step：Noise path delay del_nf is produced according to formula one.Del_nf building method not limited to this.
8th step：It is whether effective according to noise path caused by certain principle judgement.Preferably, such as the multipath bar number of selection
Reach certain amount not continuing to then select, the noise path of selection must be separated by a distance etc. with the multidiameter that has selected.
9th step：Multidiameter selecting module is exited if multidiameter selection exit criteria is met, is exported final more
Footpath delayed allocation gives descrambling and de-spreading unit.Continue to travel through targeted customer's energy footpath, interference multipath and exponent number if being unsatisfactory for
Order, continually look for other noise paths.Exit criteria can be that the multipath bar number of selection reaches certain amount.
Example 2：
As shown in fig. 7, the method for another multidiameter selection has been illustrated in it, by being assigned to each noise path
One weight, select the larger noise path of a number of weight and participate in final merging, it specifically includes following specific steps：
The first step：Targeted customer is obtained with disturbing the energy footpath information of user, including the delay of energy footpath, affiliated antenna and bag
Energy content size.
Second step：Set exponent number order.
3rd step：One is selected from targeted customer's energy footpath, delay is designated as del_ef, multipath energy eng_ef.
4th step：It is more as disturbing from remaining targeted customer's energy footpath and selection one in all interference user's energy footpaths
Footpath, postpone as del_int, energy eng_int.
5th step：Selection interference footpath owning user ceiling capacity footpath on the basis of multipath, postpone be for del_lp, energy
eng_lp。
6th step：Producing corresponding noise path delay is：
Del_nf=del_ef+order* (del_lp-del_int), weight eng_ef*eng_int*eng_lp.
7th step：Second step is repeated to the 6th step, produces all noise paths.
8th step：All noise paths are ranked up according to weight, if targeted customer's energy footpath there are N bars, selection comes
N bars noise path above participates in merging.If certain noise path is less than delta_t with the multipath interval that merges selected, delete
The noise path.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, every utilization
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (12)
- A kind of 1. method for selecting multidiameter, it is characterised in that including：A, Multipath searching is carried out to targeted customer and interference user respectively, obtains multipath relevant information；B, the energy footpath information containing targeted customer's signal energy and the energy of interference subscriber signal energy obtained according to search Measure the multidiameter selection that footpath information carries out targeted customer；In stepb, the multidiameter selection of targeted customer includes selecting energy footpath and selection noise path, and the rwo is collectively formed The multidiameter of final choice；Wherein, the selection noise routing method includes：D, according to the noise path for the principle selection target user for suppressing to disturb between multipath；Wherein, the step of noise path of the principle selection target user disturbed between the multipath according to suppression, includes：The multipath of D1, the energy footpath of selection target user as potential merging, and it is del_ef to make its delay；D2, one is selected from interference multipath, it is del_int to make its delay, wherein, the interference multipath refers to choose except described Targeted customer energy footpath outside other targeted customer's energy footpaths and it is all interference user energy footpath, it is all to choosing Multipath disturbs between having footpath；D3, a noise path is produced to suppress the interference of interference multipath；D4, the final merging of a part of noise path participation is selected based at least one criterion.
- 2. the method for selection multidiameter as claimed in claim 1, it is characterised in that in the step A, the multipath is searched Rope refers to the search to energy footpath, and it is big that the multipath relevant information includes the signal energy that energy footpath postpones to be included with every footpath It is small.
- 3. the method for selection multidiameter as claimed in claim 1, it is characterised in that when performing the step B, energy footpath System of selection includes：C, the energy footpath of targeted customer is selected, when its signal energy is less than a predetermined threshold value, it can not be carried out Merge.
- 4. the method for selection multidiameter as claimed in claim 1, it is characterised in that in the step D3, produce one Include to suppress to disturb the step of the noise path of the interference of multipath：D31, from targeted customer and disturb in the energy footpath of user and select a multipath as benchmark multipath, make its delay be del_lp；D32, according to following mathematical expression, obtain the delay del_nf in target noise footpath：Del_nf=del_ef+order* (del_lp-del_int)；Wherein, order is the integer more than 0, represents to produce the exponent number of noise path.
- 5. the method for selection multidiameter as claimed in claim 4, it is characterised in that in the step D3, in addition to：D33, work as order=1, and benchmark multipath is when choosing energy footpath, now to there is del_lp=del_ef, then according to as follows Mathematical expression obtains the delay del_nf in target noise footpath：Del_nf=2*del_lp-del_int；That is noise path del_nf and interference multipath del_int is for the energy footpath del_ef chosen into symmetric relation.
- 6. the method for selection multidiameter as claimed in claim 1, it is characterised in that in the step D4, the criterion Including：1) noise path caused by the big energy footpath of energy is preferential；2) noise path caused by the big interference footpath of energy is preferential；3) noise path caused by the big benchmark footpath of energy is preferential；4) noise path small Order is preferential；5) multidiameter interval only takes one less than two footpaths of certain threshold value.
- A kind of 7. device for selecting multidiameter, it is characterised in that including：Targeted customer's Multipath searching module, for carrying out Multipath searching to targeted customer, obtain multipath relevant information；User's Multipath searching module is disturbed, for carrying out Multipath searching to interference user, obtains multipath relevant information；Targeted customer's multidiameter selecting module, for the letter of the energy footpath containing targeted customer's signal energy obtained according to search The energy footpath information of breath and interference subscriber signal energy carries out the multidiameter selection of targeted customer；Wherein, targeted customer's multidiameter selecting module the selection of the multidiameter of targeted customer is included selecting energy footpath and Noise path is selected, the rwo collectively forms the multidiameter of final choice；Targeted customer's multidiameter selecting module is additionally operable to according to the principle selection target user's for suppressing to disturb between multipath Noise path；Wherein, targeted customer's multidiameter selecting module making an uproar according to the principle selection target user for suppressing to disturb between multipath The step of sound footpath, includes：1) multipath of the energy footpath of selection target user as potential merging, and it is del_ef to make its delay；2) one is selected from interference multipath, it is del_int to make its delay, wherein, the interference multipath refers to choose except described Targeted customer energy footpath outside other targeted customer's energy footpaths and it is all interference user energy footpath, it is all to choosing Multipath disturbs between having footpath；3) noise path is produced to suppress the interference of interference multipath；4) a part of noise path is selected based at least one criterion and participates in final merging.
- 8. the device of selection multidiameter as claimed in claim 7, it is characterised in that the Multipath searching refers to energy footpath Search, the multipath relevant information includes the signal energy size that the delay of energy footpath is included with every footpath.
- 9. the device of selection multidiameter as claimed in claim 7, it is characterised in that targeted customer's multidiameter selecting module It is additionally operable to select the energy footpath of targeted customer, when its signal energy is less than a predetermined threshold value, it can not be carried out Merge.
- 10. the device of selection multidiameter as claimed in claim 7, it is characterised in that generation one is more to suppress interference The step of noise path of the interference in footpath, includes：1) multipath is selected from the energy footpath of targeted customer and interference user, and as benchmark multipath, it is del_ to make its delay lp；2) according to following mathematical expression, the delay del_nf in acquisition target noise footpath：Del_nf=del_ef+order* (del_lp-del_int)；Wherein, order is the integer more than 0, represents to produce the exponent number of noise path.
- 11. the device of selection multidiameter as claimed in claim 10, it is characterised in thatWork as order=1, and benchmark multipath is when choosing energy footpath, now to have del_lp=del_ef, then according to following mathematics Formula obtains the delay del_nf in target noise footpath：Del_nf=2*del_lp-del_int；That is noise path del_nf and interference multipath del_int is for the energy footpath del_ef chosen into symmetric relation.
- 12. the device of selection multidiameter as claimed in claim 7, it is characterised in that the criterion includes：1) noise path caused by the big energy footpath of energy is preferential；2) noise path caused by the big interference footpath of energy is preferential；3) noise path caused by the big benchmark footpath of energy is preferential；4) noise path small Order is preferential；5) multidiameter interval only takes one less than two footpaths of certain threshold value.
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| CN101662310A (en) * | 2009-09-30 | 2010-03-03 | 中兴通讯股份有限公司 | Noise path selection method and device thereof |
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