CN102457300B - Joint detection method and device - Google Patents
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- CN102457300B CN102457300B CN 201010517318 CN201010517318A CN102457300B CN 102457300 B CN102457300 B CN 102457300B CN 201010517318 CN201010517318 CN 201010517318 CN 201010517318 A CN201010517318 A CN 201010517318A CN 102457300 B CN102457300 B CN 102457300B
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Abstract
The invention discloses a joint detection method and a joint detection device. The joint detection method comprises the following steps of: according to a channel estimation result of each disturbance user of a target user, determining the channel estimation power of the disturbance user; determining a correlation factor between each disturbance user and the target user; for each disturbance user, according to the determined correlation factor between the disturbance user and the target user, adjusting the channel estimation power of the disturbance user; selecting the disturbance user of which the adjusted channel estimation power meets a first preset condition; and according to the channel estimation result of the selected disturbance user, performing joint detection. By adoption of the technical scheme of the invention, the problem of lower accuracy of the joint detection in the prior art is solved.
Description
Technical field
The application relates to communication technical field, relates in particular to a kind of associated detecting method and device.
Background technology
At TD SDMA (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) in system, can adopt associated detection technique to eliminate interference, wherein single community associated detection technique can be eliminated in community and disturb, the multi-cell joint detection technology not only can be eliminated in community and disturb, and also can eliminate presence of intercell interference.
As shown in Figure 1, be single cell joint detection method flow chart, its concrete processing procedure is as follows:
As shown in Figure 2, be the multi-cell joint detection method flow chart, its concrete processing procedure is as follows:
From said process, each targeted customer is when carrying out the community associated detection of list or multi-cell joint detection, all in all interference users, select during the more prominent interference users of channel estimating bring joint-detection into, but interference user is not only relevant with channel estimating power to targeted customer's interference, also relevant with correlation, although for example the channel estimating power of some interference user is smaller, but larger with targeted customer's correlation, just may be more intense to this targeted customer's interference, although these interference users are interference user, but do not comprise these interference users in the interference user that prior art is selected, this has just reduced the accuracy of joint-detection.
Summary of the invention
The embodiment of the present application provides a kind of associated detecting method and device, in order to the lower problem of accuracy that solves the joint-detection existed in prior art.
The embodiment of the present application technical scheme is as follows:
A kind of associated detecting method, the method comprising the steps of: according to the channel estimation results of each interference user of targeted customer, determine the channel estimating power of this interference user; Determine the correlation factors between each interference user and described targeted customer; For each interference user, according to the correlation factors between this interference user of determining and described targeted customer, the channel estimating power of this interference user is adjusted; Channel estimating power after selecting to adjust meets the first pre-conditioned interference user; Carry out joint-detection according to the channel estimation results of the interference user of selecting.
A kind of joint-detection device comprises: the first determining unit, for the channel estimation results of each interference user according to the targeted customer, determine the channel estimating power of this interference user; The second determining unit, for determining the correlation factors between each interference user and described targeted customer; Adjustment unit, for for each interference user, this interference user of determining according to the second determining unit and the correlation factors between described targeted customer, adjusted the channel estimating power of this interference user; Selected cell, meet the first pre-conditioned interference user for selecting the channel estimating power after adjustment unit is adjusted; The joint-detection unit, carry out joint-detection for the channel estimation results of the interference user selected according to selected cell.
In the embodiment of the present application technical scheme, need to determine each interference user of targeted customer and the correlation factors between this targeted customer, then for each interference user, according to the correlation factors between this interference user of determining and described targeted customer, channel estimating power to this interference user is adjusted, the channel estimating power of selecting again after adjustment meets the first pre-conditioned interference user, the channel estimation results of the last interference user according to selecting carries out joint-detection, as can be seen here, the targeted customer is when carrying out joint-detection, the interference user that is no longer selective channel estimating power maximum is brought in joint-detection, but considered the correlation between interference user and targeted customer, this just makes channel estimating power little, but the interference user more intense to this targeted customer's interference also can be included in joint-detection, thereby effectively improved the accuracy of joint-detection.
The accompanying drawing explanation
Fig. 1 is in prior art, single cell joint detection method schematic flow sheet;
Fig. 2 is in prior art, the multi-cell joint detection method schematic flow sheet;
Fig. 3 is in the embodiment of the present application, the associated detecting method schematic flow sheet;
Fig. 4 is in the embodiment of the present application, single cell joint detection method specific implementation schematic flow sheet;
Fig. 5 is in the embodiment of the present application, multi-cell joint detection method specific implementation schematic flow sheet;
Fig. 6 is in the embodiment of the present application, joint-detection apparatus structure schematic diagram.
Embodiment
The embodiment of the present application technical scheme main realized to principle, embodiment and the beneficial effect that should be able to reach is at length set forth below in conjunction with each accompanying drawing.
As shown in Figure 3, be associated detecting method flow chart in the embodiment of the present application, its concrete processing procedure is as follows:
When carrying out the community associated detection of list, targeted customer's interference user is all users except the targeted customer in this community, targeted customer place;
When carrying out multi-cell joint detection, targeted customer's interference user is all users except the targeted customer in this community, targeted customer place, and all users in the co-frequency cell adjacent with community, targeted customer place.
At first need to obtain the channel estimation results of each interference user of targeted customer, then for each interference user, according to obtain, channel estimation results this interference user, calculate the channel estimating power of this interference user, detailed process can be, but not limited to as following:
The channel estimation results of targeted customer's i interference user is H
i, the channel estimating power of i interference user is P
i, H
ibe a sequence of complex numbers, comprise a plurality of footpaths, at first calculate the channel estimating power in each footpath, for k footpath H
i,k, H wherein
i,k=a
k+ b
kj, the channel estimating power in k footpath is P
i,k=a
2+ b
2, at H
iall footpaths in, P the footpath (P>=1) that the value of selecting is maximum, by the channel estimating power sum in this P footpath, as the channel estimating power P of i interference user
i.
Due to when carrying out joint-detection, the channel estimation results that not only needs each interference user, the channel estimation results that also needs this targeted customer self, therefore to obtain this targeted customer's channel estimation results, wherein this targeted customer's channel estimation results can obtain with together with the channel estimation results of interference user, also can before the channel estimation results that obtains interference user, obtain, can certainly obtain after the channel estimation results that obtains interference user.
For each interference user in the co-frequency cell adjacent with this community, targeted customer place, determine that the correlation factors between this interference user and described targeted customer is specially: the correlation factors between this interference user and this targeted customer is defined as to the first defined threshold, can be, but not limited to the first defined threshold and be set to 1.
For each interference user in this community, targeted customer place, determine that the correlation factors between this interference user and described targeted customer can be, but not limited to comprise following three kinds of execution modes, be specially:
The first execution mode: at first determine the main path position of this interference user and this targeted customer's main path position, whether the main path position that then judges the main path position of this interference user and this targeted customer is overlapping, if judgment result is that, be, illustrate that now this interference user does not cause interference to this targeted customer, therefore the correlation factors between this interference user and this targeted customer is defined as to the second defined threshold, otherwise the correlation factors between this interference user and this targeted customer is defined as to the first defined threshold, wherein said the second defined threshold is less than the first defined threshold, can be, but not limited to the second defined threshold and be set to 0.5,
The second execution mode: at first determine all interference users in the co-frequency cell adjacent with this community, targeted customer place channel estimating power with, with the channel estimating power of all interference users in this community, targeted customer place and ratio, then judge whether this ratio is not less than the 3rd defined threshold, if judgment result is that, be, illustrate that the interference that the interference user in now adjacent with this community, targeted customer place co-frequency cell causes the targeted customer is stronger, and a little less than the interference that the interference user in this community, targeted customer place causes the targeted customer, therefore the correlation factors between this interference user and this targeted customer is defined as to the second defined threshold, otherwise the correlation factors between this interference user and this targeted customer is defined as to the first defined threshold,
The third execution mode: at first determine all interference users in the co-frequency cell adjacent with this community, targeted customer place channel estimating power with, with the channel estimating power of all interference users in this community, targeted customer place and ratio, then judge whether this ratio is not less than the 3rd defined threshold, if judgment result is that, be, the correlation factors between this interference user and this targeted customer is defined as to the second defined threshold, if the determination result is NO, whether the main path position that continues to judge the main path position of this interference user and this targeted customer is overlapping, if judge overlapping, the correlation factors between this interference user and this targeted customer is defined as to the second defined threshold, if judge not overlapping, the correlation factors between this interference user and this targeted customer is defined as to the first defined threshold.
In summary, for each interference user in this community, targeted customer place, if this interference user satisfied second is pre-conditioned, the correlation factors between this interference user and this targeted customer is defined as to the second defined threshold, otherwise, the correlation factors between this interference user and this targeted customer is defined as to the first defined threshold.Above-mentioned second pre-conditionedly is: main path position and this targeted customer's main path position is overlapping; Or in the co-frequency cell adjacent with this community, targeted customer place all interference users channel estimating power and, with the channel estimating power of all interference users in this community, targeted customer place and ratio be not less than the 3rd defined threshold; Or in the co-frequency cell adjacent with this community, targeted customer place all interference users channel estimating power and, with the channel estimating power of all interference users in this community, targeted customer place and ratio be less than the 3rd defined threshold, and main path position and this targeted customer's main path position is overlapping.
Wherein, above-mentioned the first defined threshold, the second defined threshold and the 3rd defined threshold can be, but not limited to be determined by emulation.
The detailed process of wherein adjusting channel estimating power can be, but not limited to as following:
For each interference user, by the correlation factors between this interference user and described targeted customer, be multiplied by the channel estimating power of this interference user, obtain the channel estimating power after this interference user is adjusted.
If the correlation factors of i the interference user that step 32 is determined is α
i, the channel estimating power of this interference user before adjustment is P
i, the channel estimating power after adjustment is W
i, W
i=α
i* P
i.
In the embodiment of the present application, first pre-conditioned can be, but not limited to for: the channel estimating power after adjustment is not less than the 4th defined threshold; Or after being sorted according to the channel estimating power order from high to low after adjusting, a front defined amount channel estimating power.
That is to say, the prominent Q of the channel estimating interference user after can selecting to adjust, the channel estimating power after also can selecting to adjust is greater than the interference user of the 4th defined threshold.
In the embodiment of the present application, after selecting each interference user, according to the channel estimation results of each interference user of selecting and this targeted customer's channel estimation results, carry out joint-detection.
The associated detecting method that the embodiment of the present application provides can be, but not limited to be applicable to the TD-SCDMA system.
From above-mentioned processing procedure, in the embodiment of the present application technical scheme, need to determine each interference user of targeted customer and the correlation factors between this targeted customer, then for each interference user, according to the correlation factors between this interference user of determining and described targeted customer, channel estimating power to this interference user is adjusted, the channel estimating power of selecting again after adjustment meets the first pre-conditioned interference user, the channel estimation results of the last interference user according to selecting carries out joint-detection, as can be seen here, the targeted customer is when carrying out joint-detection, the interference user that is no longer selective channel estimating power maximum is brought in joint-detection, but considered the correlation between interference user and targeted customer, this just makes channel estimating power little, but the interference user more intense to this targeted customer's interference also can be included in joint-detection, thereby effectively improved the accuracy of joint-detection.
Below provide more detailed execution mode.
As shown in Figure 4, in the embodiment of the present application one, carry out single cell joint detection method specific implementation flow chart, its concrete processing procedure is as follows:
As shown in Figure 5, in the embodiment of the present application two, carry out multi-cell joint detection method specific implementation flow chart, its concrete processing procedure is as follows:
Accordingly, the embodiment of the present application also provides a kind of joint-detection device, and its structure as shown in Figure 6, comprises the first determining unit 61, the second determining unit 62, adjustment unit 63, selected cell 64 and joint-detection unit 65, wherein:
The first determining unit 61, for the channel estimation results of each interference user according to the targeted customer, determine the channel estimating power of this interference user;
The second determining unit 62, for determining the correlation factors between each interference user and described targeted customer;
Adjustment unit 63, for for each interference user, this interference user of determining according to the second determining unit 62 and the correlation factors between described targeted customer, adjusted the channel estimating power of this interference user;
Selected cell 64, meet the first pre-conditioned interference user for selecting the channel estimating power after adjustment unit 63 is adjusted;
Joint-detection unit 65, carry out joint-detection for the channel estimation results of the interference user selected according to selected cell 64.
Preferably, described interference user is: the interference user in this community, targeted customer place; Or the interference user in the co-frequency cell adjacent with this community, targeted customer place.
More preferably, the second determining unit specifically comprises that first determines subelement, judgment sub-unit, second definite subelement and the 3rd definite subelement, wherein:
First determines subelement, and each interference user for the co-frequency cell for adjacent with this community, targeted customer place, be defined as the first defined threshold by the correlation factors between this interference user and this targeted customer;
Judgment sub-unit, for each interference user for this community, targeted customer place, judge that whether this interference user meets second pre-conditioned;
Second determines subelement, for when judgment result is that of judgment sub-unit is, the correlation factors between this interference user and this targeted customer is defined as to the second defined threshold;
The 3rd determines subelement, when the determination result is NO in judgment sub-unit, the correlation factors between this interference user and this targeted customer is defined as to the first defined threshold, and wherein said the second defined threshold is less than the first defined threshold.
More preferably, described second pre-conditionedly is: main path position and this targeted customer's main path position is overlapping; Or in the co-frequency cell adjacent with this community, targeted customer place all interference users channel estimating power and, with the channel estimating power of all interference users in this community, targeted customer place and ratio be not less than the 3rd defined threshold; Or in the co-frequency cell adjacent with this community, targeted customer place all interference users channel estimating power and, with the channel estimating power of all interference users in this community, targeted customer place and ratio be less than the 3rd defined threshold, and main path position and this targeted customer's main path position is overlapping.
Preferably, described adjustment unit 63 is for each interference user, correlation factors between, this interference user that determine by the second determining unit 62 and described targeted customer, be multiplied by the channel estimating power of this interference user, obtains the channel estimating power after this interference user is adjusted.
Preferably, described first pre-conditionedly is: the channel estimating power after adjustment is not less than the 4th defined threshold; Or after being sorted according to the channel estimating power order from high to low after adjusting, a front defined amount channel estimating power.
The joint-detection device that the embodiment of the present application provides can be placed in subscriber equipment, also can be independent of subscriber equipment, and in addition, this joint-detection device can also be placed in base station.
Obviously, those skilled in the art can carry out various changes and modification and the spirit and scope that do not break away from the application to the application.Like this, if within these of the application are revised and modification belongs to the scope of the application's claim and equivalent technologies thereof, the application also is intended to comprise these changes and modification interior.
Claims (8)
1. an associated detecting method, is characterized in that, comprising:
According to the channel estimation results of each interference user of targeted customer, determine the channel estimating power of this interference user;
Determine the correlation factors between each interference user and described targeted customer;
For each interference user, according to the correlation factors between this interference user of determining and described targeted customer, the channel estimating power of this interference user is adjusted;
Channel estimating power after selecting to adjust meets the first pre-conditioned interference user;
Carry out joint-detection according to the channel estimation results of the interference user of selecting;
Described interference user is:
Interference user in this community, targeted customer place; Or
Interference user in the co-frequency cell adjacent with this community, targeted customer place;
Determine the correlation factors between each interference user and described targeted customer, specifically comprise:
Each interference user in the co-frequency cell adjacent with this community, targeted customer place, be defined as the first defined threshold by the correlation factors between this interference user and this targeted customer;
For each interference user in this community, targeted customer place, if this interference user satisfied second is pre-conditioned, the correlation factors between this interference user and this targeted customer is defined as to the second defined threshold, otherwise, correlation factors between this interference user and this targeted customer is defined as to the first defined threshold, and wherein said the second defined threshold is less than the first defined threshold.
2. associated detecting method as claimed in claim 1, is characterized in that, described second pre-conditionedly is:
Main path position and this targeted customer's main path position is overlapping; Or
In the co-frequency cell adjacent with this community, targeted customer place the channel estimating power of all interference users and, with the channel estimating power of all interference users in this community, targeted customer place and ratio be not less than the 3rd defined threshold; Or
In the co-frequency cell adjacent with this community, targeted customer place the channel estimating power of all interference users and, with the channel estimating power of all interference users in this community, targeted customer place and ratio be less than the 3rd defined threshold, and main path position and this targeted customer's main path position is overlapping.
3. associated detecting method as claimed in claim 1, is characterized in that, according to the correlation factors between this interference user of determining and described targeted customer, the channel estimating power of this interference user adjusted, and specifically comprises:
By the correlation factors between this interference user and described targeted customer, be multiplied by the channel estimating power of this interference user, obtain the channel estimating power after this interference user is adjusted.
4. associated detecting method as claimed in claim 1, is characterized in that, described first pre-conditionedly is:
Channel estimating power after adjustment is not less than the 4th defined threshold; Or
After being sorted according to the channel estimating power order from high to low after adjusting, a front defined amount channel estimating power.
5. a joint-detection device, is characterized in that, comprising:
The first determining unit, for the channel estimation results of each interference user according to the targeted customer, determine the channel estimating power of this interference user;
The second determining unit, for determining the correlation factors between each interference user and described targeted customer;
Adjustment unit, for for each interference user, this interference user of determining according to the second determining unit and the correlation factors between described targeted customer, adjusted the channel estimating power of this interference user;
Selected cell, meet the first pre-conditioned interference user for selecting the channel estimating power after adjustment unit is adjusted;
The joint-detection unit, carry out joint-detection for the channel estimation results of the interference user selected according to selected cell;
Described interference user is:
Interference user in this community, targeted customer place; Or
Interference user in the co-frequency cell adjacent with this community, targeted customer place;
The second determining unit specifically comprises:
First determines subelement, and each interference user for the co-frequency cell for adjacent with this community, targeted customer place, be defined as the first defined threshold by the correlation factors between this interference user and this targeted customer;
Judgment sub-unit, for each interference user for this community, targeted customer place, judge that whether this interference user meets second pre-conditioned;
Second determines subelement, for when judgment result is that of judgment sub-unit is, the correlation factors between this interference user and this targeted customer is defined as to the second defined threshold;
The 3rd determines subelement, when the determination result is NO in judgment sub-unit, the correlation factors between this interference user and this targeted customer is defined as to the first defined threshold, and wherein said the second defined threshold is less than the first defined threshold.
6. joint-detection device as claimed in claim 5, is characterized in that, described second pre-conditionedly is:
Main path position and this targeted customer's main path position is overlapping; Or
In the co-frequency cell adjacent with this community, targeted customer place the channel estimating power of all interference users and, with the channel estimating power of all interference users in this community, targeted customer place and ratio be not less than the 3rd defined threshold; Or
In the co-frequency cell adjacent with this community, targeted customer place the channel estimating power of all interference users and, with the channel estimating power of all interference users in this community, targeted customer place and ratio be less than the 3rd defined threshold, and main path position and this targeted customer's main path position is overlapping.
7. joint-detection device as claimed in claim 5, it is characterized in that, described adjustment unit is for each interference user, correlation factors that the second determining unit is determined, between this interference user and described targeted customer, be multiplied by the channel estimating power of this interference user, obtain the channel estimating power after this interference user is adjusted.
8. joint-detection device as claimed in claim 5, is characterized in that, described first pre-conditionedly is:
Channel estimating power after adjustment is not less than the 4th defined threshold; Or
After being sorted according to the channel estimating power order from high to low after adjusting, a front defined amount channel estimating power.
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| CN103825627B (en) * | 2013-12-10 | 2015-07-29 | 大唐移动通信设备有限公司 | A kind of associated detecting method and base station |
| CN110932800B (en) * | 2019-11-29 | 2020-09-18 | 北京邮电大学 | Joint detection method and device for broadband multi-user scene |
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| EP1511185A1 (en) * | 2003-08-26 | 2005-03-02 | Telefonaktiebolaget LM Ericsson (publ) | Positioning of a path searcher window in a CDMA receiver |
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| CN102014507A (en) * | 2009-09-04 | 2011-04-13 | 普天信息技术研究院有限公司 | User uplink resource scheduling method in HSUPA system |
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| WO2007115434A1 (en) * | 2006-04-12 | 2007-10-18 | Zte Corporation | Strong interference canceling method for neighboring cells using same frequency in cdma system |
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| EP1511185A1 (en) * | 2003-08-26 | 2005-03-02 | Telefonaktiebolaget LM Ericsson (publ) | Positioning of a path searcher window in a CDMA receiver |
| CN1874170A (en) * | 2005-06-03 | 2006-12-06 | 上海原动力通信科技有限公司 | United detection method for multiple cells in time division code division multiple access |
| CN101369822A (en) * | 2007-08-13 | 2009-02-18 | 大唐移动通信设备有限公司 | Method and apparatus for confirming cell coverage area through common signal channel |
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