CN103795437A - Method and device for selecting multipath delay - Google Patents
Method and device for selecting multipath delay Download PDFInfo
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- CN103795437A CN103795437A CN201210428050.0A CN201210428050A CN103795437A CN 103795437 A CN103795437 A CN 103795437A CN 201210428050 A CN201210428050 A CN 201210428050A CN 103795437 A CN103795437 A CN 103795437A
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Abstract
The invention discloses a method and a device for selecting multipath delay. The method comprises the steps of carrying out multipath search on a target user and an interference user to acquire multipath correlation information, and carrying out multipath delay selection of the target user according to searched energy path information containing target user signal energy and searched energy path information containing interference user signal energy. Compared with the prior art, selected multipath delay can better achieve the performance of an advanced receiver, better suppress interference, improve the SINR after combination and reduce the error rate of the receiver by the adoption of the method and the device of the invention.
Description
Technical field
The present invention relates to CDMA(Code Division Multiple Access, code division multiple access) band receiver of base technical field, especially relevant to the multipath distribution in Rake Rake receiver, more particularly, the present invention relates to a kind of method and apparatus of selecting multidiameter and distributing.
Background technology
In CDMA systems, Rake receiver is widely used.As shown in Figure 1, first Rake receiver will carry out energy path search to signal, find the multi-path location that has signal energy, then the reception signal of these multi-path locations is distributed to descrambling and de-spreading unit and carry out descrambling and de-spreading, finally the symbol after descrambling and de-spreading is carried out to high specific merging, can be for the soft symbol of judgement or decoding thereby obtain.
Along with the development of receiver technology, the senior receiver that performance is more superior also starts to be applied to real system, for example MMSE(Minimum Mean Square Error, least mean-square error), GRAKE(General Rake, general Rake) receiver etc.
For Rake receiver, the multi-path location of distribution all contains signal energy conventionally, and for senior receiver, multi-path location can not comprise signal energy, and only comprises interfering energy.Conventionally, the multipath that contains signal energy is referred to as to energy footpath, the multipath that does not only contain interfering energy containing signal energy is referred to as to noise path.Continue with reference to figure 1, the result that energy path search and noise path are selected is all assigned to descrambling and de-spreading unit, senior receiver obtains maximum signal energy by the descrambling and de-spreading symbol that merges these energy footpaths and noise path, suppress to disturb simultaneously, thereby can obtain than the better performance of Rake receiver.
But, no matter be Rake receiver or senior receiver, under the identical prerequisite of receiver algorithm, the distribution of multipath, comprises energy footpath and noise path, can affect the error rate of final systematic function and receiving symbol etc.This is because if the selection of energy footpath is suitable, can collect to greatest extent signal energy; If it is suitable that noise path is selected, can farthest suppress to disturb, so, selecting the selection module of multidiameter is the important module that is related to systematic function, for this reason, how a kind of method of selecting multidiameter is provided, disturbs farthest to collect signal energy and to suppress, just become a problem needing at present solution badly.
Summary of the invention
Select improper in order to overcome the multidiameter existing in prior art, thereby cannot farthest bring into play problem and the defect of senior receiver performance, the object of the present invention is to provide a kind of method and apparatus of selecting multidiameter, to obtaining better systematic function, and the lower receiving symbol error rate.
In order to reach object of the present invention, the present invention realizes by the following technical solutions:
A method of selecting multidiameter, comprising:
A, respectively targeted customer and interference user are carried out to Multipath searching, obtain multipath relevant information;
The energy footpath information of B, the energy footpath information that contains targeted customer's signal energy obtaining according to search and interference user signal energy is carried out targeted customer's multidiameter and is selected.
Preferably, in described steps A, described Multipath searching refers to the search to energy footpath, and described multipath relevant information comprises that energy footpath postpones and every signal energy size that footpath comprises.
Preferably, in described step B, targeted customer's multidiameter is selected to comprise and is selected energy footpath and select noise path, these both common multidiameters that form final selection.
Preferably, in the time carrying out described step B, the footpath system of selection of described energy comprises:
C, targeted customer's energy footpath is selected, in the time that its signal energy is less than a predetermined threshold value, can not merged it.
Preferably, in the time carrying out described step B, described noise path system of selection comprises:
D, according to the noise path that suppresses the principle select target user who disturbs between multipath.
Preferably, comprise according to the step of the noise path that suppresses the principle select target user who disturbs between multipath:
D1, select target user's an energy footpath is as the multipath of potential merging, and makes it postpone for del_ef;
D2, select one from disturbing multipath, make it postpone for del_int, wherein, described interference multipath refer to except the described targeted customer's who chooses energy footpath other targeted customer's energy footpath and the energy footpath of all interference users, it all disturbs choosing multipath to have between footpath;
D3, noise path of generation are in order to suppress to disturb the interference of multipath;
D4, select a part of noise path based at least one criterion and participate in final merging.
Preferably, in described step D3, produce one and disturb the step of the noise path of the interference of multipath to comprise in order to inhibition:
D31, from the energy footpath of targeted customer and interference user, select a multipath as benchmark multipath, make it postpone for del_lp;
D32, the following mathematical expression of foundation, the delay del_nf in acquisition target noise footpath:
del_nf?=?del_ef+order*(del_lp-del_int)；
Wherein, order is greater than 0 integer, represents to produce the exponent number of noise path.
Preferably, in described step D3, also comprise:
D33, work as order=1, and benchmark multipath is while choosing energy footpath, now has del_lp=del_ef, obtain the delay del_nf in target noise footpath according to following mathematical expression:
del_nf?=?2*del_lp-del_int?；
Be that noise path del_nf and interference multipath del_int become symmetric relation for the energy footpath del_ef choosing.
Preferably, in described step D4, described criterion comprises:
1) noise path that the energy footpath that energy is large produces is preferential;
2) noise path that the interference footpath that energy is large produces is preferential;
3) noise path that the benchmark footpath that energy is large produces is preferential;
4) noise path that Order is little is preferential;
5) two footpaths that multidiameter interval is less than certain threshold value are only got one.
A device of selecting multidiameter, comprising:
Targeted customer's Multipath searching module, for targeted customer is carried out to Multipath searching, obtains multipath relevant information;
Interference user Multipath searching module, for interference user is carried out to Multipath searching, obtains multipath relevant information;
Targeted customer's multidiameter is selected module, and the energy footpath information that contains targeted customer's signal energy obtaining for foundation search and the energy footpath information of interference user signal energy are carried out targeted customer's multidiameter and selected.
Preferably, described Multipath searching refers to the search to energy footpath, and described multipath relevant information comprises that energy footpath postpones and every signal energy size that footpath comprises.
Preferably, targeted customer's multidiameter selects module to comprise and select energy footpath and select noise path targeted customer's multidiameter selection, the final multidiameters selected of these both common formations.
Preferably, targeted customer's multidiameter selects module also to select for the energy footpath to targeted customer, in the time that its signal energy is less than a predetermined threshold value, can not merge it.
Preferably, targeted customer's multidiameter selects module also for according to the noise path that suppresses the principle select target user who disturbs between multipath.
Preferably, targeted customer's multidiameter selects module to comprise according to the step of the noise path that suppresses the principle select target user who disturbs between multipath:
1) select target user energy footpath is as the multipath of potential merging, and makes it postpone for del_ef;
2) from disturb multipath, select one, make it postpone for del_int, wherein, described interference multipath refer to except the described targeted customer's who chooses energy footpath other targeted customer's energy footpath and the energy footpath of all interference users, it all disturbs choosing multipath to have between footpath;
3) produce a noise path in order to suppress to disturb the interference of multipath;
4) select a part of noise path based at least one criterion and participate in final merging.
Preferably, producing one disturbs the step of the noise path of the interference of multipath to comprise in order to inhibition:
1) from the energy footpath of targeted customer and interference user, select a multipath as benchmark multipath, make it postpone for del_lp;
2), 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 greater than 0 integer, represents to produce the exponent number of noise path.
Preferably, work as order=1, and benchmark multipath is while choosing energy footpath, now has del_lp=del_ef, obtain the delay del_nf in target noise footpath according to following mathematical expression:
del_nf?=?2*del_lp-del_int?；
Be that noise path del_nf and interference multipath del_int become symmetric relation for the energy footpath del_ef choosing.
Preferably, described criterion comprises:
1) noise path that the energy footpath that energy is large produces is preferential;
2) noise path that the interference footpath that energy is large produces is preferential;
3) noise path that the benchmark footpath that energy is large produces is preferential;
4) noise path that Order is little is preferential;
5) two footpaths that multidiameter interval is less than certain threshold value are only got one.
Technical scheme by the invention described above can be found out, adopt the method for the invention and device, compared with prior art, selected multidiameter more can be brought into play the performance of senior receiver, better suppress to disturb, improve the SINR(Signal to Interference plus Noise Ratio after merging, Signal Interference and Noise Ratio), the error rate of reduction receiver.
Accompanying drawing explanation
Fig. 1 has illustrated the general structure of existing band spread receiver, i.e. multidiameter selection and distribution, descrambling and de-spreading, multipath merge, Decision Decoding;
Fig. 2 has illustrated the Module Division of the device of the selection multidiameter that the embodiment of the present invention provides, and roughly can be divided into targeted customer's Multipath searching module, interference user Multipath searching module and targeted customer's multidiameter and select module;
Fig. 3 has illustrated the method realization flow of the selection multidiameter that the embodiment of the present invention provides, and comprises the selection in energy footpath and the generation of noise path;
Fig. 4 has illustrated the method flow of the principle generation noise path based on suppressing to disturb between footpath in the embodiment of the present invention;
Fig. 5 has illustrated the generation flow process of noise path in the embodiment of the present invention;
Fig. 6 has illustrated a kind of method flow of selecting multidiameter that the embodiment of the present invention 1 provides, by multipath energy being sorted to select noise path;
Fig. 7 has illustrated a kind of method flow of selecting multidiameter that the embodiment of the present invention 2 provides, and by giving a weight to each noise path, the larger noise path of weight of selecting some participates in final merging.
Realization, functional characteristics and the excellent effect of the object of the invention, be described further below in conjunction with specific embodiment and accompanying drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, can be implemented so that those skilled in the art can better understand the present invention also, but illustrated embodiment is not as a limitation of the invention.
In the present invention, respectively targeted customer and interference user are carried out to Multipath searching, obtain multipath relevant information.The targeted customer here i.e. benefited user.Multipath searching refers to the search to energy footpath, can be the relevant search based on known array.After Multipath searching, obtain the energy footpath information that contains targeted customer's signal energy, with the energy footpath information that contains interference user signal energy.This patent proposes based target user and interference user energy footpath information is carried out targeted customer's multidiameter selection, and the result of selection can directly be carried out multipath distribution.
Because targeted customer's multidiameter selects to have considered that the energy footpath information of interference user, such multipath are distributed makes the senior receiver can autotelic inhibition interference user energy, improve targeted customer's demodulation performance.When interference user energy accounts for ratio that total interference adds white noise when higher, the method gain is more obvious.
A kind of method of selecting multidiameter that the embodiment of the present invention provides, comprises the steps:
S10, respectively targeted customer and interference user are carried out to Multipath searching, obtain multipath relevant information;
The energy footpath information of S20, the energy footpath information that contains targeted customer's signal energy obtaining according to search and interference user signal energy is carried out targeted customer's multidiameter and is selected.
In the present embodiment, in described step S10, described Multipath searching refers to the search to energy footpath, and described multipath relevant information comprises that energy footpath postpones and every signal energy size that footpath comprises.
In described step S20, targeted customer's multidiameter is selected to comprise and is selected energy footpath and select noise path, these both common multidiameters that form final selection.
In the time carrying out described step S20, the footpath system of selection of described energy comprises:
S30, targeted customer's energy footpath is selected, in the time that its signal energy is less than a predetermined threshold value, can not merged it.
In the time carrying out described step S30, described noise path system of selection comprises:
S40, according to the noise path that suppresses the principle select target user who disturbs between multipath.
In this step S40, comprise according to the step of the noise path that suppresses the principle select target user who disturbs between multipath:
S401, select target user's an energy footpath is as the multipath of potential merging, and makes it postpone for del_ef;
S402, select one from disturbing multipath, make it postpone for del_int, wherein, described interference multipath refer to except the described targeted customer's who chooses energy footpath other targeted customer's energy footpath and the energy footpath of all interference users, it all disturbs choosing multipath to have between footpath;
S403, noise path of generation are in order to suppress to disturb the interference of multipath;
S404, select a part of noise path based at least one criterion and participate in final merging.
In described step S403, produce one and disturb the step of the noise path of the interference of multipath to comprise in order to inhibition:
S4031, from the energy footpath of targeted customer and interference user, select a multipath as benchmark multipath, make it postpone for del_lp;
S4032, the following mathematical expression of foundation, the delay del_nf in acquisition target noise footpath:
del_nf?=?del_ef+order*(del_lp-del_int)；
Wherein, order is greater than 0 integer, represents to produce the exponent number of noise path.
Preferably, in described step S403, also comprise:
S4033, work as order=1, and benchmark multipath is while choosing energy footpath, now has del_lp=del_ef, obtain the delay del_nf in target noise footpath according to following mathematical expression:
del_nf?=?2*del_lp-del_int?；
Be that noise path del_nf and interference multipath del_int become symmetric relation for the energy footpath del_ef choosing.
In described step S404, described criterion comprises:
1) noise path that the energy footpath that energy is large produces is preferential;
2) noise path that the interference footpath that energy is large produces is preferential;
3) noise path that the benchmark footpath that energy is large produces is preferential;
4) noise path that Order is little is preferential;
5) two footpaths that multidiameter interval is less than certain threshold value are only got one.
For example, in a specific embodiment, described targeted customer's multidiameter system of selection comprises following concrete steps:
Step 1: first targeted customer and interference user are carried out to Multipath searching, obtain corresponding energy footpath information.
Step 2: the targeted customer who obtains according to step 1 and interference user energy footpath information are carried out the selection of targeted customer's multidiameter.Targeted customer's multidiameter selects to be divided into two parts, selects energy footpath and selects noise path, and as shown in Figure 3, these two parts form the final multidiameter of selecting jointly.
Step 3: according to step 2, targeted customer's energy footpath is selected, energy is less than can not merging of certain predetermined threshold value.
Step 4: as Fig. 4, according to step 2, according to the noise path that suppresses the principle select target user who disturbs between multipath, concrete steps are as follows:
Step 4a: select target user's an energy footpath is as the multipath of potential merging.Make it postpone for del_ef, as shown in Figure 5, two energy footpaths of targeted customer, three energy footpaths of interference user, wherein, the sequence number in the energy footpath of choosing is " 1 ".
Step 4b: except other targeted customer's energy footpath of choosing energy footpath, and all disturb choosing multipath to have between footpath in the energy footpath of all interference users.Select these to disturb in multipath, make it postpone for del_int, as shown in Figure 5, the sequence number in the interference footpath of choosing is " 5 ".
Step 4c: produce a noise path in order to suppress to disturb the interference of multipath, for example, production method is as follows:
(1) from the energy footpath of targeted customer, interference user, select a multipath as benchmark multipath, make it postpone for del_lp, as shown in Figure 5, the benchmark multipath sequence number of choosing is " 3 "
(2) the delay del_nf of noise path is:
Del_nf=del_ef+order* (del_lp-del_int) formula one;
Wherein, order is greater than 0 integer, represents to produce the exponent number of noise path.As Fig. 5, order=1, producing sequence number is the noise path of " 6 ".
(3) work as order=1, when benchmark multipath is the energy footpath of choosing, i.e. del_lp=del_ef, formula one deteriorates to:
Del_nf=2*del_lp-del_int formula two;
Be that noise path del_nf becomes symmetric relation with disturbing multipath del_int about the energy footpath del_ef choosing.
Step 4d: potential combining energy footpath can be a lot of with the pairing situation of disturbing multipath, and the noise path of generation also has a lot, need to the criterion based on certain selects a part of noise path and participates in final merging, and wherein said criterion is as follows:
1) noise path that the energy footpath that energy is large produces is preferential;
2) noise path that the interference footpath that energy is large produces is preferential;
3) noise path that the benchmark footpath that energy is large produces is preferential;
4) noise path that Order is little is preferential;
5) two footpaths that multidiameter interval is less than certain threshold value are only got one.
The embodiment of the present invention also provides a kind of device of selecting multidiameter, comprising:
Targeted customer's Multipath searching module, for targeted customer is carried out to Multipath searching, obtain multipath relevant information, wherein, described Multipath searching refers to the search to energy footpath, and described multipath relevant information comprises that energy footpath postpones and every signal energy size that footpath comprises.
Interference user Multipath searching module, for interference user is carried out to Multipath searching, obtains multipath relevant information;
Targeted customer's multidiameter is selected module, and the energy footpath information that contains targeted customer's signal energy obtaining for foundation search and the energy footpath information of interference user signal energy are carried out targeted customer's multidiameter and selected.
Multipath searching module is selected to provide information for targeted customer's multidiameter, comprises the energy footpath information of targeted customer and interference user.
The energy footpath information that targeted customer's multidiameter selects module to consider targeted customer and interference user is carried out the selection of targeted customer's multidiameter, farthest to bring into play the performance of senior receiver.Considering the energy footpath Information Selection targeted customer's of targeted customer and interference user multidiameter, is energy footpath if the multi-path location of selection contains targeted customer's signal energy, is noise path if do not contain.Energy footpath and noise path all need to carry out descrambling and de-spreading, finally carry out symbol merging according to certain merging weight.
Particularly, targeted customer's multidiameter selects module to comprise and select energy footpath and select noise path targeted customer's multidiameter selection, the final multidiameters selected of these both common formations.
Targeted customer's multidiameter selects module also to select for the energy footpath to targeted customer, in the time that its signal energy is less than a predetermined threshold value, can not merge it.
In addition, targeted customer's multidiameter selects module also for according to the noise path that suppresses the principle select target user who disturbs between multipath.
Particularly, targeted customer's multidiameter selects module to comprise according to the step of the noise path that suppresses the principle select target user who disturbs between multipath:
1) select target user energy footpath is as the multipath of potential merging, and makes it postpone for del_ef;
2) from disturb multipath, select one, make it postpone for del_int, wherein, described interference multipath refer to except the described targeted customer's who chooses energy footpath other targeted customer's energy footpath and the energy footpath of all interference users, it all disturbs choosing multipath to have between footpath;
3) produce a noise path in order to suppress to disturb the interference of multipath;
4) select a part of noise path based at least one criterion and participate in final merging.
Wherein, producing one disturbs the step of the noise path of the interference of multipath to comprise in order to inhibition:
1) from the energy footpath of targeted customer and interference user, select a multipath as benchmark multipath, make it postpone for del_lp;
2), 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 greater than 0 integer, represents to produce the exponent number of noise path.
When concrete enforcement, work as order=1, and benchmark multipath is while choosing energy footpath, now has del_lp=del_ef, obtain the delay del_nf in target noise footpath according to following mathematical expression:
del_nf?=?2*del_lp-del_int?；
Be that noise path del_nf and interference multipath del_int become symmetric relation for the energy footpath del_ef choosing.
In addition, described in, selecting the criterion that a part of noise path participates in final merging comprises:
1) noise path that the energy footpath that energy is large produces is preferential;
2) noise path that the interference footpath that energy is large produces is preferential;
3) noise path that the benchmark footpath that energy is large produces is preferential;
4) noise path that Order is little is preferential;
5) two footpaths that multidiameter interval is less than certain threshold value are only got one.
Example 1:
As shown in Figure 6, it for example understands a kind of method that multidiameter is selected, and by multipath energy being sorted to select noise path, comprises following concrete steps:
The first step: obtain the energy footpath information of targeted customer and interference user, comprise the delay of energy footpath, affiliated antenna and comprise energy size.
Second step: the signal energy containing according to multipath sorts to multipath.User is not distinguished in the sequence here, does not distinguish antenna, only energy is carried out from large to little sequence, and user under a certain multipath after certainly sorting, affiliated antenna still needs one to one.
The 3rd step: establishing exponent number is order, it is poorer that higher the produced noise path of exponent number suppresses the effect of interference, thus first search for the noise path of order=1, the noise path of then searching for order=2, by that analogy.
The 4th step: select target user energy footpath is as one article of potential merging multipath successively according to containing targeted customer's signal energy order from big to small, and multidiameter is designated as del_ef.
The 5th step: according to all multipaths on antenna under energy size traversal merging multipath, regard this multipath as interference multipath, multidiameter is designated as del_int.Disturb the multipath can be from targeted customer, also can be from interference user, the interference multipath that energy is large needs priority treatment.
The 6th step: with disturbing under multipath user's a certain article of multipath interference multipath that disinthibites, the delay in this benchmark footpath is designated as del_lp.This footpath can be to disturb the ceiling capacity footpath of the affiliated user of multipath on affiliated antenna, can be also the ceiling capacity footpath of disturbing the affiliated user of multipath, can be also other multipaths.
The 7th step: produce noise path according to formula one and postpone del_nf.The building method of del_nf is not limited to this.
The 8th step: judge that according to certain principle whether the noise path producing is effective.Preferably, no longer continue to select as the multipath number of selecting reaches some, the noise path of selection must be separated by a distance etc. with the multidiameter of selecting.
The 9th step: select exit criteria to exit multidiameter selection module if meet multidiameter, export final multidiameter and distribute to descrambling and de-spreading unit.Continue traversal targeted customer's energy footpath if do not meet, disturb multipath and exponent number order, continue to find other noise path.Exit criteria can be that the multipath number of selecting reaches some.
Example 2:
As shown in Figure 7, it for example understands the method that another kind of multidiameter is selected, and by giving a weight to each noise path, the larger noise path of weight of selecting some participates in final merging, and it specifically comprises following concrete steps:
The first step: obtain the energy footpath information of targeted customer and interference user, comprise the delay of energy footpath, affiliated antenna and comprise energy size.
Second step: set exponent number order.
The 3rd step: select one article from targeted customer's energy footpath, postpone to be designated as del_ef, multipath energy is eng_ef.
The 4th step: select one article as disturbing multipath from remaining targeted customer's energy footpath and all interference user energy footpath, postpone for del_int, energy is eng_int.
The 5th step: selecting to disturb the affiliated user's in footpath ceiling capacity footpath is benchmark multipath, postpones for del_lp, and energy is eng_lp.
The 6th step: producing corresponding noise path delay is:
Del_nf=del_ef+order* (del_lp-del_int), weight is eng_ef*eng_int*eng_lp.
The 7th step: repeat second step to the six steps, produce all noise path.
The 8th step: according to weight, all noise path are sorted, if there is N bar in targeted customer's energy footpath, the N bar noise path of selecting to come above participates in merging.If certain noise path is less than delta_t with the merging multipath interval of selecting, delete this noise path.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (18)
1. a method of selecting multidiameter, is characterized in that, comprising:
A, respectively targeted customer and interference user are carried out to Multipath searching, obtain multipath relevant information;
The energy footpath information of B, the energy footpath information that contains targeted customer's signal energy obtaining according to search and interference user signal energy is carried out targeted customer's multidiameter and is selected.
2. the method for selection multidiameter as claimed in claim 1, is characterized in that, in described steps A, described Multipath searching refers to the search to energy footpath, and described multipath relevant information comprises that energy footpath postpones and every signal energy size that footpath comprises.
3. the method for selection multidiameter as claimed in claim 1, is characterized in that, in described step B, targeted customer's multidiameter is selected to comprise and selected energy footpath and select noise path, these both common multidiameters that form final selection.
4. the method for selection multidiameter as claimed in claim 3, is characterized in that, in the time carrying out described step B, the system of selection of energy footpath comprises:
C, targeted customer's energy footpath is selected, in the time that its signal energy is less than a predetermined threshold value, can not merged it.
5. the method for selection multidiameter as claimed in claim 3, is characterized in that, in the time carrying out described step B, noise path system of selection comprises:
D, according to the noise path that suppresses the principle select target user who disturbs between multipath.
6. the method for selection multidiameter as claimed in claim 5, is characterized in that, comprises according to the step of the noise path that suppresses the principle select target user who disturbs between multipath:
D1, select target user's an energy footpath is as the multipath of potential merging, and makes it postpone for del_ef;
D2, select one from disturbing multipath, make it postpone for del_int, wherein, described interference multipath refer to except the described targeted customer's who chooses energy footpath other targeted customer's energy footpath and the energy footpath of all interference users, it all disturbs choosing multipath to have between footpath;
D3, noise path of generation are in order to suppress to disturb the interference of multipath;
D4, select a part of noise path based at least one criterion and participate in final merging.
7. the method for selection multidiameter as claimed in claim 6, is characterized in that, in described step D3, produces one and disturbs the step of the noise path of the interference of multipath to comprise in order to inhibition:
D31, from the energy footpath of targeted customer and interference user, select a multipath as benchmark multipath, make it postpone for del_lp;
D32, the following mathematical expression of foundation, the delay del_nf in acquisition target noise footpath:
del_nf?=?del_ef+order*(del_lp-del_int)；
Wherein, order is greater than 0 integer, represents to produce the exponent number of noise path.
8. the method for selection multidiameter as claimed in claim 7, is characterized in that, in described step D3, also comprises:
D33, work as order=1, and benchmark multipath is while choosing energy footpath, now has del_lp=del_ef, obtain the delay del_nf in target noise footpath according to following mathematical expression:
del_nf?=?2*del_lp-del_int?；
Be that noise path del_nf and interference multipath del_int become symmetric relation for the energy footpath del_ef choosing.
9. the method for selection multidiameter as claimed in claim 6, is characterized in that, in described step D4, described criterion comprises:
1) noise path that the energy footpath that energy is large produces is preferential;
2) noise path that the interference footpath that energy is large produces is preferential;
3) noise path that the benchmark footpath that energy is large produces is preferential;
4) noise path that Order is little is preferential;
5) two footpaths that multidiameter interval is less than certain threshold value are only got one.
10. a device of selecting multidiameter, is characterized in that, comprising:
Targeted customer's Multipath searching module, for targeted customer is carried out to Multipath searching, obtains multipath relevant information;
Interference user Multipath searching module, for interference user is carried out to Multipath searching, obtains multipath relevant information;
Targeted customer's multidiameter is selected module, and the energy footpath information that contains targeted customer's signal energy obtaining for foundation search and the energy footpath information of interference user signal energy are carried out targeted customer's multidiameter and selected.
The device of 11. selection multidiameters as claimed in claim 10, is characterized in that, described Multipath searching refers to the search to energy footpath, and described multipath relevant information comprises that energy footpath postpones and every signal energy size that footpath comprises.
The device of 12. selection multidiameters as claimed in claim 10, it is characterized in that, targeted customer's multidiameter selects module to comprise and select energy footpath and select noise path targeted customer's multidiameter selection, the final multidiameters selected of these both common formations.
The device of 13. selection multidiameters as claimed in claim 12, is characterized in that, targeted customer's multidiameter selects module also to select for the energy footpath to targeted customer, in the time that its signal energy is less than a predetermined threshold value, can not merge it.
The device of 14. selection multidiameters as claimed in claim 12, is characterized in that, targeted customer's multidiameter selects module also for according to the noise path that suppresses the principle select target user who disturbs between multipath.
The device of 15. selection multidiameters as claimed in claim 10, is characterized in that, targeted customer's multidiameter selects module to comprise according to the step of the noise path that suppresses the principle select target user who disturbs between multipath:
1) select target user energy footpath is as the multipath of potential merging, and makes it postpone for del_ef;
2) from disturb multipath, select one, make it postpone for del_int, wherein, described interference multipath refer to except the described targeted customer's who chooses energy footpath other targeted customer's energy footpath and the energy footpath of all interference users, it all disturbs choosing multipath to have between footpath;
3) produce a noise path in order to suppress to disturb the interference of multipath;
4) select a part of noise path based at least one criterion and participate in final merging.
The device of 16. selection multidiameters as claimed in claim 15, is characterized in that, produces one and disturbs the step of the noise path of the interference of multipath to comprise in order to inhibition:
1) from the energy footpath of targeted customer and interference user, select a multipath as benchmark multipath, make it postpone for del_lp;
2), 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 greater than 0 integer, represents to produce the exponent number of noise path.
The device of 17. selection multidiameters as claimed in claim 16, is characterized in that,
Work as order=1, and benchmark multipath is while choosing energy footpath, now has del_lp=del_ef, obtain the delay del_nf in target noise footpath according to following mathematical expression:
del_nf?=?2*del_lp-del_int；
Be that noise path del_nf and interference multipath del_int become symmetric relation for the energy footpath del_ef choosing.
The device of 18. selection multidiameters as claimed in claim 15, is characterized in that, described criterion comprises:
1) noise path that the energy footpath that energy is large produces is preferential;
2) noise path that the interference footpath that energy is large produces is preferential;
3) noise path that the benchmark footpath that energy is large produces is preferential;
4) noise path that Order is little is preferential;
5) two footpaths that multidiameter interval is less than certain threshold value are only got one.
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