CN100558000C - Decision method of access at random and system under the theaomni-directional transmission section receiving antenna mode - Google Patents
Decision method of access at random and system under the theaomni-directional transmission section receiving antenna mode Download PDFInfo
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- CN100558000C CN100558000C CNB2006101041428A CN200610104142A CN100558000C CN 100558000 C CN100558000 C CN 100558000C CN B2006101041428 A CNB2006101041428 A CN B2006101041428A CN 200610104142 A CN200610104142 A CN 200610104142A CN 100558000 C CN100558000 C CN 100558000C
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Abstract
The present invention relates to the access decision method and the system of Physical Random Access Channel under a kind of omnidirectional emission sector receiving mode, the present invention mainly comprises: the multipath signal that the antenna sets under the theaomni-directional transmission sector reception OTSR pattern receives is searched for, chosen effective antenna sets; Determine the multi-path judging window of described effective antenna sets; Finish subscriber equipment according to the signal to noise ratio of described multi-path judging window and insert judgement.The access of PRACH signal judgement provides solution under the OTSR of the being embodied as pattern of the present invention.By under the OTSR pattern, adopting the present invention, can be implemented in the access judgement of PRACH under the OTSR pattern, improve the diversity gain of up reception, improve the success rate that subscriber equipment inserts simultaneously.
Description
Technical field
The present invention relates to communication technical field, relate in particular to decision method of access at random and system under a kind of theaomni-directional transmission section receiving antenna mode.
Background technology
In the wireless communication system, owing to influenced by ground environment, wireless signal owing to just can reach receiving terminal through many routes of transmission such as direct projection, reflection, scatterings, the multipath transmisstion effect can occur in communication process.The WCDMA system is by carrying out energy merging processing at subscriber equipment and base station with the multipath signal that receives, utilize the signal to noise ratio of the correlation raising received signal between multipath signal, thereby overcome the signal attenuation that the multipath transmisstion effect causes, this process has also embodied the basic principle of diversity reception.
Usually, the base station adopts single antenna to send in a sub-district, the 2 antenna mode of operations that dual-antenna diversity receives.Under 2 antenna mode of operations, the base station is by in the multipath window of determining at 2 antennas, according to PRACH (Physical Random Access Channel, Physical Random Access Channel) go up the energy of multipath signal and the relation of noise and judged whether that subscriber equipment inserts, this operating process is called the access judging process of PRACH again.
Under some particular surroundingss, when big, may there be the covering bottleneck in 2 antenna modes as the coverage requirement of sub-district, and the signal to noise ratio that the receiver of described 2 antenna modes receives signal may not satisfy the requirement that inserts judgement.In this case, adopt the mode of operation of 4 antennas usually, promptly two groups of antennas are used in same sub-district, cover this sub-district simultaneously by these two groups of antennas.Like this, utilize the diversity gain of 4 antennas, improve the signal to noise ratio of received signal, thereby improve the success rate that subscriber equipment inserts.
In the less area of traffic carrying capacity,,,, then obviously exist to cover bottleneck if adopt 2 antenna modes perhaps at the networking initial stage as Chinese countryside; If adopt 4 antenna modes, then need to consider the cost problem, may cause the bigger wasting of resources.At this moment, OTSR (Omni Transmit Sectoral Receive, the theaomni-directional transmission sector receives) technology is to select preferably.
The OTSR antenna mode is at a kind of networking mode that proposes under the little situation of WCDMA network capacity.The basic principle of OTSR is to use a power amplifier at descending (emission) link, by splitter the power output one of this power amplifier is divided on three antennas delivering to three sectors after three respectively and launches; On up direction (reception), from the two-way diversity reception signal of each sector.The signal of each sector is received by different receive paths, and arrives TRM respectively (Transmit-Receive Unit).For access channel, because traditional access channel demodulation is softer pooling function not, and the signal of access channel may be by wherein any one or several sector be inserted, therefore, if do not do particular processing, can be at the control content information of 3 AICH of descending generation (AICH Acquisition Indication Channel) and the demodulating information stream of 3 up MESSAGE (message).And the access sector of UE is unknown, because there is the possibility of 2/3 failure only fixing one of them sector of selecting as inserting the sector when so just causing UE to insert when UE inserts.
Summary of the invention
The invention provides the method and system that insert judgement at random under a kind of theaomni-directional transmission section receiving antenna mode, thereby improve the access success rate of subscriber equipment under this pattern.
Purpose of the present invention is achieved through the following technical solutions:
The invention provides the decision method of access at random under a kind of theaomni-directional transmission section receiving antenna mode, comprising:
A, the multipath signal that three groups of antenna sets under the omnidirectional emission sector receiving mode are received are searched for, choose two groups of effective antenna sets at the most according to Search Results, described effective antenna sets is to have two groups of higher antenna sets of signal to noise ratio in the antenna sets of multipath signal or the described three groups of antenna sets;
In the less area of traffic carrying capacity,,,, then obviously exist to cover bottleneck if adopt 2 antenna modes perhaps at the networking initial stage as Chinese countryside; If adopt 4 antenna modes, then need to consider the cost problem, may cause the bigger wasting of resources.At this moment, OTSR (Omni Transmit Sectoral Receive, the theaomni-directional transmission sector receives) technology is to select preferably.
The OTSR antenna mode is at a kind of networking mode that proposes under the little situation of WCDMA network capacity.The basic principle of OTSR is to use a power amplifier at descending (emission) link, by splitter the power output one of this power amplifier is divided on three antennas delivering to three sectors after three respectively and launches; On up direction (reception), from the two-way diversity reception signal of each sector.The signal of each sector is received by different receive paths, and arrives TRM respectively (Transmit-Receive Unit).For access channel, because traditional access channel demodulation is softer pooling function not, and the signal of access channel may be by wherein any one or several sector be inserted, therefore, if do not do particular processing, can be at the control content information of 3 AICH of descending generation (AICH Acquisition Indication Channel) and the demodulating information stream of 3 up MESSAGE (message).And the access sector of UE is unknown, because there is the possibility of 2/3 failure only fixing one of them sector of selecting as inserting the sector when so just causing UE to insert when UE inserts.
Summary of the invention
The invention provides the method and system that insert judgement at random under a kind of theaomni-directional transmission section receiving antenna mode, thereby improve the access success rate of subscriber equipment under this pattern.
Purpose of the present invention is achieved through the following technical solutions:
The invention provides the decision method of access at random under a kind of theaomni-directional transmission section receiving antenna mode, comprising:
A, the multipath signal that three groups of antenna sets under the omnidirectional emission sector receiving mode are received are searched for, choose two groups of effective antenna sets at the most according to Search Results, described effective antenna sets is to have two groups of higher antenna sets of signal to noise ratio in the antenna sets of multipath signal or the described three groups of antenna sets;
Both phase relations determine that the correlation of these two multipath windows is uncorrelated, relevant but not overlapping or overlapping;
B3, determine the multi-path judging window according to the correlation of described two multipath windows.
Described step B3 specifically comprises:
When two corresponding respectively multipath windows of described two groups of antenna sets are uncorrelated, calculate the signal to noise ratio of these two multipath windows, and the bigger multipath window of selection signal to noise ratio is the multi-path judging window of theaomni-directional transmission section receiving antenna mode;
When described two multipath windows are correlated with but are not overlapping, after multipath signal relevant in these two multipath windows merged, generate and merge the multipath window, and after described merging multipath window limit window operation, relatively limit merging multipath window and the corresponding multipath window of original two groups of antenna sets behind the window, selecting the multipath window of signal to noise ratio maximum among the three is the multi-path judging window of theaomni-directional transmission section receiving antenna mode;
When described two multipath windows are overlapping, all multipath signals in these two multipath windows are merged, generate merging multipath window, this merging multipath window comprises all multipath signals in described two multipath windows; To obtain merging the multipath window and limit the window operation, obtain the multi-path judging window of omnidirectional emission sector receiving mode.
Described step D specifically comprises:
The predefined threshold value of the signal to noise ratio of the described multi-path judging window that relatively calculates and system inserts if the signal to noise ratio of multi-path judging window, is then adjudicated subscriber equipment greater than thresholding; Otherwise judgement does not have subscriber equipment to insert.
The present invention also provides the access decision system at random under a kind of theaomni-directional transmission section receiving antenna mode, and described system comprises:
The multipath signal search unit, this unit is searched for the multipath signal that three groups of antenna sets under the omnidirectional emission sector receiving mode receive, choose two groups of effective antenna sets at the most according to Search Results, and Search Results is offered effective antenna sets choose the unit, described effective antenna sets is to have two groups of higher antenna sets of signal to noise ratio in the antenna sets of multipath signal or the described three groups of antenna sets;
Effectively antenna sets is chosen the unit, and effective antenna sets is chosen according to Search Results in this unit;
Multi-path judging window generation unit, this unit generate the multi-path judging window of omnidirectional emission sector receiving mode according to the multipath window of effective antenna sets correspondence;
The limited diameter unit, this unit limits the multipath number in the multi-path judging window of described multi-path judging window generation unit generation;
Multipath signal in energy merge cells, this unit multi-path judging window after with limited diameter carries out energy and merges;
The snr computation unit, this unit calculates the signal to noise ratio of multipath window or multi-path judging window.
Subscriber equipment inserts decision unit, and this unit is according to the access state of the signal to noise ratio judgement subscriber equipment of multi-path judging window.
Described system also comprises:
Multipath window generation unit, effective antenna sets data that this unit is chosen the unit and provided according to described effective antenna sets generate the multipath window of each antenna sets correspondence.
Described system also comprises:
Effectively the antenna sets group is counted judging unit, and this unit is chosen the information of preserving the unit according to described effective antenna sets and judged that described effective antenna sets is one group or two groups, if one group, then, trigger multi-path judging window generation unit; Otherwise, trigger multipath window correlation determining unit.
Described system also comprises:
Multipath window correlation determining unit, this unit determines that according to both phase relations of candidate footpath of phase place minimum in the candidate of phase place maximum in the first multipath window in two multipath windows of described effective antenna sets correspondence footpath and the second multipath window correlation of these two multipath windows is uncorrelated, relevant but not overlapping or overlapping, triggers multi-path judging window generation unit afterwards.
By the invention described above technical scheme as seen, the access judgement that is embodied as PRACH signal under theaomni-directional transmission sector reception (OTSR) pattern of the present invention provides solution.By under the OTSR pattern, adopting the present invention, be implemented in the access judgement of PRACH under the OTSR pattern, promptly, improve the diversity gain of up reception by improving the signal to noise ratio of OTSR antenna mode, improve the success rate that subscriber equipment inserts simultaneously.
Description of drawings
Fig. 1 is the flow chart of choosing effective antenna sets under the OTSR antenna mode that specific embodiments of the present invention provide;
Fig. 2 is the flow chart of the multi-path judging window of definite OTSR antenna mode correspondence of providing of specific embodiments of the present invention;
Fig. 3 is the access decision system schematic diagram of PRACH under a kind of OTSR pattern of providing of specific embodiments of the present invention.
Embodiment
The present invention at first carries out the multipath signal search to three groups of antenna sets mainly by under the OTSR antenna mode, selects maximum two groups of antenna sets as effective antenna sets to be combined; Generate the multi-path judging window of OTSR according to the relation of the multipath window of described maximum two groups of antenna sets correspondences; Limit multipath number in the described multi-path judging window, merge multipath signal energy in the described multi-path judging window, and calculate the signal to noise ratio of described multi-path judging window, thereby finish the access judgement of subscriber equipment.
For the OTSR antenna mode, on up direction, there are 3 groups of antenna sets, therefore, the present invention considers to choose effective antenna sets from these three groups of antenna sets, and described effective antenna sets is meant that this antenna sets receives multipath signal, can participate in energy and merge.
In conjunction with Fig. 1 the process of choosing effective antenna sets under the OTSR antenna mode that the present invention provides is described.
Step 11, three groups of antenna sets are carried out multipath signal search;
The signal to noise ratio of antenna is respectively organized in step 13, calculating;
After having determined effective antenna sets, need to determine the multipath window of described effective antenna sets correspondence, and determine the multi-path judging window of OTSR antenna mode 2 to specify the process that the present invention determines the multi-path judging window of OTSR antenna mode correspondence in conjunction with the accompanying drawings according to the multipath window.
Effective antenna sets that step 21, basis are chosen judges whether described effective antenna sets has only one group, if then execution in step 22; Otherwise, execution in step 23;
Wherein, definite method of the multipath window of each effective antenna sets correspondence is identical with definite method of multipath window in existing 2 antenna modes in the OTSR antenna mode, this method comprises: when the multipath signal that search OTSR antenna receives, the multipath signal that the energy that searches is the highest is a most powerful path; The multipath window of described OTSR antenna mode is the center with this most powerful path exactly, comprises the interval of these most powerful path N chips in front and back (chip).As seen, described multipath window comprises all multipath signals in the 2N chips width, the candidate footpath that these multipath signals merge for participating in energy.Wherein, N chips is the multipath window width of default.
The process that is generated the multi-path judging window by the multipath window of one group of OTSR antenna correspondence is also identical with the generative process of multi-path judging window in existing 2 antenna modes, needs obtain the multi-path judging window that needs through limit window process; By multipath number in the multi-path judging window that obtains is limited, promptly limited diameter obtains participating in the multipath signal that energy merges afterwards.
Described limit window process comprises: the width of the multipath window of one group of effective antenna sets correspondence that will obtain and the multipath window width of default compare, if the width of this multipath window is not more than the multipath window width of default, keep the width of this multipath window constant so, this multipath window of organizing effective antenna sets correspondence is the multi-path judging window; Otherwise, abandon the minimum one or more candidates footpath of energy in this multipath window of organizing effective antenna sets correspondence successively, be not more than the multipath window width of default until the width of the multipath window that obtains, the multipath window that obtains at last is the multi-path judging window.
The multipath window of two groups of antenna sets correspondences is definite identical with definite method of multipath window in the above-mentioned steps 22 in the described step 23.In addition, among the present invention, determine that the method for the correlation of two multipath windows in the OTSR antenna mode determines that with existing the method for two multipath window correlations in 4 antenna modes is identical.This method comprises: the correlation of two multipath windows is determined according to the candidate footpath of phase place maximum in two multipath windows or both phase place magnitude relationship of candidate footpath of phase place minimum.The correlation of two multipath windows of two groups of antenna sets correspondences can be defined as following three kinds of situations according to this phase relation, wherein, the candidate who sets phase place minimum in the first multipath window directly is last candidate footpath in the first multipath window; The candidate who sets phase place maximum in the second multipath window directly is first candidate footpath in the second multipath window:
If the difference of the phase place in last candidate footpath is more than or equal to the multipath window width of default in the phase place in second interior first candidate footpath of multipath window and first multipath window, then these two multipath windows are uncorrelated;
If in second multipath window in the phase place in first candidate footpath and first multipath window the difference of the phase place in last candidate footpath more than or equal to zero and less than the multipath window width of default, then two multipath windows are relevant not overlapping;
If first candidate phase place directly is less than last candidate phase place directly in first multipath window in second multipath window, then these two multipath windows have overlapping.
In this step that the present invention provides, definite process of the multi-path judging window of OTSR antenna mode is identical with definite method of the multi-path judging window of existing 4 antenna modes.This method comprises:
Because the correlation difference of two multipath windows, therefore, the method for the multi-path judging window of generation OTSR antenna mode is also different.
When two corresponding respectively multipath windows of two groups of effective antenna sets are uncorrelated, adopt the method for calculating signal to noise ratio, by the signal to noise ratio of more described two multipath windows, selecting the bigger multipath window of signal to noise ratio is the multi-path judging window of OTSR antenna mode;
When two corresponding respectively multipath windows of two groups of effective antenna sets were correlated with but are not overlapping, the employing part merged the method for two multipath windows, generates to merge the multipath window.The method that described part merges two multipath windows comprises: first candidate phase place directly with the second multipath window deducts the multipath window width of default as the start-phase that merges the multipath window; Last candidate phase place directly with the first multipath window adds that the multipath window width of default is as the end phase place that merges the multipath window.After determining to merge the start-phase of multipath window and finishing phase place, obtain merging the multipath window; Afterwards, the merging multipath window that obtains is limit the window operation, and will limit the merging multipath window multipath window width corresponding with original two groups of antenna sets behind the window to compare, selecting the multipath window of signal to noise ratio maximum among the three is the multi-path judging window of OTSR antenna mode.
When two corresponding respectively multipath windows of two groups of effective antenna sets are overlapping,, generate merging multipath window by two the multipath windows that are completely integrated.Wherein, the described operation that is completely integrated comprises: with the start-phase of first candidate phase place directly in the first multipath window as merging multipath window, with the end phase place of last candidate phase place directly in the second multipath window as merging multipath window, the start-phase that determine to merge the multipath window with finish phase place after, obtain described two multipath windows and merge the multipath window when overlapping.This merging multipath window comprises all multipath signals in described two multipath windows.To obtain merging the multipath window and limit the window operation, obtain the multi-path judging window of OTSR antenna mode.
Described limited diameter process comprises: the multipath number that the candidate in described multi-path judging window footpath quantity and Rake receiver can be supported compares, if the footpath of the candidate in multi-path judging window quantity is no more than the multipath number that the Rake receiver can be supported, then keep the multipath number in this multi-path judging window constant; Otherwise, abandoning the one or more candidates footpath of this multi-path judging window self-energy minimum successively, the multipath number in this multi-path judging window is no more than the multipath number that actual Rake receiver can be supported.After the limited diameter operation, the candidate footpath in the multi-path judging window is called effective diameter again.
Wherein, the signal to noise ratio of described multi-path judging window is the ratio of the noise energy in multipath signal energy summation and the multi-path judging window in the multi-path judging window.
Described access judging process is identical with judging process in existing 2 antenna modes or 4 antenna modes, the predefined threshold value of signal to noise ratio and system that is about to the multi-path judging window compares, if the signal to noise ratio of multi-path judging window, is then adjudicated subscriber equipment greater than thresholding and is inserted; Otherwise judgement does not have subscriber equipment to insert.
The method that generates 4 antenna mode multi-path judging windows has multiple, and a kind of simple way is exactly two multipath window signal to noise ratios having determined in comparison 4 antenna modes, and to set the bigger multipath window of signal to noise ratio be the multi-path judging window of 4 antenna modes.This method is simple, and still, the signal to noise ratio of the multi-path judging window that obtains by this method may not be too big.
The present invention also provides the access decision system of Physical Random Access Channel under a kind of omnidirectional emission sector receiving mode as described in Figure 3, and described system comprises the unit of following function:
(1) multipath signal search unit
This unit is searched for the multipath signal that the antenna sets under the OTSR pattern receives, and Search Results is offered effective antenna sets chooses the unit.
The multipath signal search procedure is described consistent with the method that the invention described above provides.
(2) effectively antenna sets is chosen the unit
Effective antenna sets is chosen according to Search Results in this unit.
Described effective antenna sets is chosen the unit and specifically is used for choosing the antenna sets that receives multipath signal according to Search Results, and preserves the antenna sets data that this receives multipath signal, and this antenna sets is effective antenna sets.Effectively the process of choosing of antenna sets is described consistent with the method that the invention described above provides.
(3) multipath window generation unit
Effective antenna sets data that this unit is chosen the unit and provided according to described effective antenna sets generate the multipath window of each antenna sets correspondence.
The generative process of multipath window is described consistent with the method that the invention described above provides.
(4) effectively the antenna sets group is counted judging unit
This unit is chosen the information of preserving the unit according to described effective antenna sets and is judged that described effective antenna sets is one group or two groups, if one group, then, trigger multi-path judging window generation unit; Otherwise, trigger multipath window correlation determining unit.
(5) multipath window correlation determining unit
This unit determines that according to both phase relations of candidate footpath of phase place minimum in the candidate of phase place maximum in the first multipath window in two multipath windows of described effective antenna sets correspondence footpath and the second multipath window correlation of these two multipath windows is uncorrelated, relevant but not overlapping or overlapping, triggers multi-path judging window generation unit afterwards.
Definite process of described two multipath window correlations is described consistent with the method that the invention described above provides.
(6) multi-path judging window generation unit
This unit generates the multi-path judging window of OTSR pattern according to the multipath window of effective antenna sets correspondence;
The generative process of the multi-path judging window of OTSR pattern is described consistent with the method that the invention described above provides.
(7) limited diameter unit
This unit limits the multipath number in the multi-path judging window of described multi-path judging window generation unit generation.The method of described limited diameter is described consistent with the method that the invention described above provides.
(8) energy merge cells
Multipath signal in the multi-path judging window of this unit after with limited diameter carries out energy and merges.
(9) snr computation unit
This unit calculates the signal to noise ratio of multipath window or multi-path judging window.
(10) subscriber equipment inserts decision unit
This unit is according to the access state of the signal to noise ratio judgement subscriber equipment of multi-path judging window.
Described subscriber equipment inserts the predefined threshold value of signal to noise ratio and system that decision unit specifically is used for the described multi-path judging window that comparison snr computation unit calculates, if the signal to noise ratio of multi-path judging window, is then adjudicated the subscriber equipment access greater than thresholding; Otherwise judgement does not have subscriber equipment to insert.
In sum, the access of PRACH signal judgement provides solution under the OTSR of the being embodied as pattern of the present invention.By under the OTSR pattern, adopting the present invention, can be implemented in the access judgement of PRACH under the OTSR pattern, improve the diversity gain of up reception, improve the success rate that subscriber equipment inserts simultaneously.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (11)
1, the decision method of access at random under a kind of theaomni-directional transmission section receiving antenna mode is characterized in that, comprising:
A, the multipath signal that three groups of antenna sets under the omnidirectional emission sector receiving mode are received are searched for, choose two groups of effective antenna sets at the most according to Search Results, described effective antenna sets is to have two groups of higher antenna sets of signal to noise ratio in the antenna sets of multipath signal or the described three groups of antenna sets;
B, determine the multi-path judging window of described effective antenna sets;
C, multipath number in the described multi-path judging window is limited, the multipath signal in the multi-path judging window behind the limited diameter is carried out energy merge, according to multipath signal energy in the multi-path judging window behind the described limited diameter with calculate the signal to noise ratio of this multi-path judging window;
D, finish subscriber equipment according to the signal to noise ratio of described multi-path judging window and insert judgement.
2, method according to claim 1 is characterized in that, describedly chooses two groups of effective antenna sets at the most according to Search Results, specifically comprises:
Do not receive multipath signal if search in described three groups of antenna sets one group or two groups of antenna sets, then abandon this group or two groups of antenna sets data, reservation can receive the antenna sets data of multipath signal, and the antenna sets that is retained is effective antenna sets.
3, method according to claim 1 is characterized in that, describedly chooses two groups of effective antenna sets at the most according to Search Results, specifically comprises:
All receive multipath signal if search described three groups of antenna sets, then calculate the signal to noise ratio of respectively organizing antenna in these three groups of antenna sets, and abandon one group of antenna sets data of signal to noise ratio minimum according to result of calculation, keep two groups of bigger antenna sets data of signal to noise ratio, the antenna sets that is retained is effective antenna sets.
4, method according to claim 2 is characterized in that, described step B comprises:
B1, if described effective antenna sets be one group of antenna sets, then the multipath window by this antenna sets correspondence generates the multi-path judging window, the multipath window width of the width of promptly more described multipath window and default, if the former is not more than the latter, then described multipath window is the multi-path judging window; Otherwise, abandon the minimum multipath signal of energy in the described multipath window successively, be not more than the multipath window width of default until the width of the multipath window that obtains, the multipath window that obtains at last is the multi-path judging window.
5, according to claim 2 or 3 described methods, it is characterized in that described step B also comprises:
B2, if described effective antenna sets is two groups of antenna sets, then determine that according to both phase relations of candidate footpath of phase place minimum in the candidate of phase place maximum in the first multipath window in two multipath windows of these two groups of antenna sets correspondences footpath and the second multipath window correlation of these two multipath windows is uncorrelated, relevant but not overlapping or overlapping;
B3, determine the multi-path judging window according to the correlation of described two multipath windows.
6, method according to claim 5 is characterized in that, described step B3 specifically comprises:
When two corresponding respectively multipath windows of described two groups of antenna sets are uncorrelated, calculate the signal to noise ratio of these two multipath windows, and the bigger multipath window of selection signal to noise ratio is the multi-path judging window of theaomni-directional transmission section receiving antenna mode;
When described two multipath windows are correlated with but are not overlapping, after multipath signal relevant in these two multipath windows merged, generate and merge the multipath window, and after described merging multipath window limit window operation, relatively limit merging multipath window and the corresponding multipath window of original two groups of antenna sets behind the window, selecting the multipath window of signal to noise ratio maximum among the three is the multi-path judging window of theaomni-directional transmission section receiving antenna mode;
When described two multipath windows are overlapping, all multipath signals in these two multipath windows are merged, generate merging multipath window, this merging multipath window comprises all multipath signals in described two multipath windows; To obtain merging the multipath window and limit the window operation, obtain the multi-path judging window of theaomni-directional transmission section receiving antenna mode.
7, method according to claim 6 is characterized in that, described step D specifically comprises:
The predefined threshold value of the signal to noise ratio of the described multi-path judging window that relatively calculates and system inserts if the signal to noise ratio of multi-path judging window, is then adjudicated subscriber equipment greater than thresholding; Otherwise judgement does not have subscriber equipment to insert.
8, the access decision system at random under a kind of theaomni-directional transmission section receiving antenna mode is characterized in that described system comprises:
The multipath signal search unit, the multipath signal that three groups of antenna sets under the omnidirectional emission sector receiving mode receive is searched for, choose two groups of effective antenna sets at the most according to Search Results, and Search Results is offered effective antenna sets choose the unit, described effective antenna sets is to have two groups of higher antenna sets of signal to noise ratio in the antenna sets of multipath signal or the described three groups of antenna sets;
Effectively antenna sets is chosen the unit, and effective antenna sets is chosen according to Search Results in this unit;
Multi-path judging window generation unit, this unit generate the multi-path judging window of omnidirectional emission sector receiving mode according to the multipath window of effective antenna sets correspondence;
The limited diameter unit, this unit limits the multipath number in the multi-path judging window of described multi-path judging window generation unit generation;
Multipath signal in energy merge cells, this unit multi-path judging window after with limited diameter carries out energy and merges;
The snr computation unit, this unit calculates the signal to noise ratio of multipath window or multi-path judging window;
Subscriber equipment inserts decision unit, and this unit is according to the access state of the signal to noise ratio judgement subscriber equipment of multi-path judging window.
9, system according to claim 8 is characterized in that, described system also comprises:
Multipath window generation unit, effective antenna sets data that this unit is chosen the unit and provided according to described effective antenna sets generate the multipath window of each antenna sets correspondence.
10, system according to claim 9 is characterized in that, described system also comprises:
Effectively the antenna sets group is counted judging unit, and this unit is chosen the information of preserving the unit according to described effective antenna sets and judged that described effective antenna sets is one group or two groups, if one group, then, trigger multi-path judging window generation unit; Otherwise, trigger multipath window correlation determining unit.
11, system according to claim 10 is characterized in that, described system also comprises:
Multipath window correlation determining unit, this unit determines that according to both phase relations of candidate footpath of phase place minimum in the candidate of phase place maximum in the first multipath window in two multipath windows of described effective antenna sets correspondence footpath and the second multipath window correlation of these two multipath windows is uncorrelated, relevant but not overlapping or overlapping, triggers multi-path judging window generation unit afterwards.
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