CN102958145B - A kind of method and device for realizing up space division multiple access - Google Patents
A kind of method and device for realizing up space division multiple access Download PDFInfo
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Abstract
The invention discloses a kind of method and device for realizing up space division multiple access, methods described includes：The mean receiving power of each user on the various channels is obtained, is that each user selects to be used for uplink demodulation passage；Calculate expectation received power of each user on all passages；According to expectation received power of each user on all passages, total jamming power of each user in uplink demodulation passage is obtained；And calculate the ratio for the interference code power ISCP on the uplink demodulation passage that total jamming power of each user and the user are obtained ahead of time, or, calculating total jamming power of each user and the ratio of expectation received power of the user on the uplink demodulation passage；When the ratio of all users is respectively less than predetermined threshold value, up channel is multiplexed using space division multiple access mode.The present invention can obtain the system performance gain that good isolation between user is brought, and improve system effectiveness.
Description
Technical field
The present invention relates to mobile communication technology field, more particularly to a kind of method and dress for realizing up space division multiple access
Put.
Background technology
As shown in figure 1, in existing TD-SCDMA (Time Division Synchronous Coda Division
Multiple Access, TD SDMA) in indoor distributed system, for some descending code channel, it is all
Down transmitting power on passage is controlled by system side baseband equipment, meanwhile, utilize A-DPCH (Associated Dedicated
Physical Channel, up following special physical channel) information such as isolation between user can be obtained, it is possible to obtain
The mutual disturbed condition under space division state between user, and then judge whether the descending code channel can carry out space division between certain user
Multiplexing.
For uplink physical channel, such as HS-SICH (High Speed Shared Information Channel,
High-speed shared information channel), E-PUCH (Enhanced Uplink Physical Channel strengthen uplink physical channel)
Deng because the uplink transmission power system side baseband equipment of its each user can not be learnt, therefore, it is impossible to pass through prior art side
Case obtains the disturbed condition between user, and then can not judge whether that space division multiplexing can be carried out to up channel.So, just can not
The system performance gain that good isolation is brought between acquisition user.Therefore, the prior art is defective, it is necessary to improve.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method and device for realizing up space division multiple access, to solve
Cause not judging whether that sky can be carried out to up channel due to the disturbed condition between user can not be obtained in the prior art
The problem of dividing multiplexing.
In order to solve the above technical problems, on the one hand, the present invention provides a kind of method for realizing up space division multiple access, the side
Method comprises the following steps：
Obtain the mean receiving power of each user on the various channels；
It is that each user selects to be used for uplink demodulation passage according to the mean receiving power on each passage；
Calculate expectation received power of each user on all passages；
According to expectation received power of each user on all passages, each user is obtained in the total of uplink demodulation passage
Jamming power；And calculate the doing on the uplink demodulation passage that total jamming power of each user and the user are obtained ahead of time
Scrambler power ISCP ratio, or, calculating total jamming power of each user with the user on the uplink demodulation passage
The ratio of expectation received power；
When the ratio of all users is respectively less than predetermined threshold value, up channel is carried out using space division multiple access mode
Multiplexing.
Further, the mean receiving power of each user on the various channels is obtained, is specifically included：
In current transmission time interval TTI, channel estimation, channel estimation are carried out to user uplink following special physical channel
As a result HiFor：Hi=[hI, 1, hI, 2..., hI, 16], i=1,2 ..., M；Wherein, i represents channel position, and M represents the number of passage
Amount；
Calculate the instantaneous received power P on passage iiFor：
It regard the instantaneous received power as mean receiving power；Or, being filtered to multiple TTI instantaneous received power
Or after smoothing processing, obtain the mean receiving power.
Further, it is that each user selects to lead to for uplink demodulation according to the mean receiving power on each passage
Road, specifically includes following steps：
Judge whether maximum mean receiving power and the difference of time big mean receiving power are less than given threshold, if it is,
Maximum mean receiving power and secondary passage greatly corresponding to mean receiving power are selected as the uplink demodulation passage of the user,
If it is not, then selecting the corresponding passage of the maximum mean receiving power as the uplink demodulation passage of the user.
Further, expectation received power of each user on all passages is calculated, following steps are specifically included：
On the chip-level carrier interference ratio C/I R needed according to the up channel being obtained ahead of time, and each user's demodulation passage
ISCP, calculates expectation received power of each user on demodulation passage；
According to the mean receiving power of each user on the various channels, the reception on each user's non-demodulated passage is calculated
The ratio of power and the mean receiving power on demodulation passage；
According to the receiving power on each user's non-demodulated passage with demodulation passage on mean receiving power ratio, with
And expectation received power of each user on demodulation passage, calculate expectation of each user on non-demodulated passage and receive work(
Rate.
Further, if user uplink demodulation passage has one, expectation of the user on uplink demodulation passage is received
Power P 'iFor：P′i=CIRISCPi；Wherein, the ISCP on each passage is expressed as ISCPi；I=1,2 ..., M, i be logical
Road sequence number, M is total channel number；
If user uplink demodulation passage has N number of, and N is more than 1, and the set expression of demodulation passage is：Λ=1 ...,
N }, then expectation received power of the user on all uplink demodulation passages be：
Wherein, P '1..., P 'NFor expectation received power of the user on uplink demodulation passage, P1..., PNFor the use
Mean receiving power on the uplink demodulation passage of family.
Further, expectation received power P ' of the user on non-demodulated passage iiFor：
Wherein, P 'jAnd PjThe expectation received power and mean receiving power on demodulation passage j, P are represented respectivelyiRepresent non-solution
Adjust the mean receiving power on passage i.
On the other hand, the present invention also provides a kind of device for realizing up space division multiple access, and described device includes：
Mean receiving power acquiring unit, for obtaining the mean receiving power of each user on the various channels；
Uplink demodulation channel selection unit, for being each user according to the mean receiving power on each passage
Select to be used for uplink demodulation passage；
Expectation received power computing unit, for calculating expectation received power of each user on all passages；
Up space division multiple access Multiplexing Unit, for the expectation received power according to each user on all passages, is obtained
Total jamming power of each user in uplink demodulation passage；And calculate total jamming power of each user and the user is obtained ahead of time
The interference code power ISCP on the uplink demodulation passage ratio, or, calculate total jamming power of each user with should
The ratio of expectation received power of the user on the uplink demodulation passage；When the ratio of all users is respectively less than pre- gating
During limit value, up channel is multiplexed using space division multiple access mode.
Further, the mean receiving power acquiring unit further comprises：
Channel estimation subelement, in current transmission time interval TTI, entering to user uplink following special physical channel
Row channel estimation, channel estimation results are：Hi=[hI, 1, hI, 2..., hI, 16], i=1,2 ..., M；
Instantaneous received power computation subunit, for calculating the instantaneous received power on passage i：
Mean receiving power obtains subelement, for regarding the instantaneous received power as mean receiving power；Or, to many
Individual TTI instantaneous received power be filtered or smoothing processing after, obtain the mean receiving power.
Further, the uplink demodulation channel selection unit further comprises：
Judgment sub-unit, for judging whether maximum mean receiving power and the difference of time big mean receiving power are less than setting
Threshold value；
Subelement is selected, for judging maximum mean receiving power and time big mean receiving power in the judgment sub-unit
Difference when being less than given threshold, passage corresponding to the maximum mean receiving power of selection and time big mean receiving power was as should
The uplink demodulation passage of user；And, judge maximum mean receiving power and time big average received work(in the judgment sub-unit
When the difference of rate is not less than given threshold, the corresponding passage of the maximum mean receiving power is selected as the uplink demodulation of the user
Passage.
Further, the expectation received power computing unit further comprises：
Demodulate passage expectation received power and obtain subelement, for the chip-level needed according to the up channel being obtained ahead of time
ISCP on carrier interference ratio C/I R, and each user's demodulation passage, calculates expectation of each user on demodulation passage and receives work(
Rate；
Non-demodulated passage expectation received power obtains subelement, for being averaged and connect on the various channels according to each user
Power is received, receiving power and the ratio of the mean receiving power on demodulation passage on each user's non-demodulated passage is calculated；Root
According to the receiving power on each user's non-demodulated passage and the ratio of the mean receiving power on demodulation passage, and each user
Expectation received power on demodulation passage, calculates expectation received power of each user on non-demodulated passage.
The present invention has the beneficial effect that：
The present invention judges to use up channel by obtaining mean receiving power, expectation received power, total jamming power
Space division multiple access mode is multiplexed, can be by obtaining the disturbed condition between user, and then judge whether can be to up channel
Space division multiplexing is carried out, thus, it is possible to obtain the system performance gain that isolation good between user is brought, improves system effectiveness.
Brief description of the drawings
Fig. 1 is TD-SCDMA indoor distributed systems schematic diagram in the prior art；
Fig. 2 is a kind of flow chart for the method for realizing up space division multiple access in the embodiment of the present invention；
Fig. 3 is a kind of structural representation for the device for realizing up space division multiple access in the embodiment of the present invention.
Embodiment
In order to solve in the prior art due to the disturbed condition between user can not be obtained and cause to judge whether can be with
The problem of space division multiplexing is carried out to up channel, the invention provides a kind of method and device for realizing up space division multiple access, with
Lower combination accompanying drawing and embodiment, the present invention will be described in further detail.It should be appreciated that specific implementation described herein
Example does not limit the present invention only to explain the present invention.
As shown in Fig. 2 the present embodiments relate to a kind of method for realizing up space division multiple access, more particularly, to one kind
SDMA (the Spatial Division Multiple Access, sky of up channel are realized under TD-SCDMA system indoor environment
The access of point multiple access) method, comprise the following steps：
Step S101, obtains the mean receiving power of each user on the various channels.
In this step, channel estimation is carried out to user uplink following special physical channel, using channel estimation results, obtained
The mean receiving power of user on the various channels；It is assumed that current TTI (Transmission Time Interval, during transmission
Between be spaced), the transient channel estimated result H of up following special physical channeliFor：Hi=[hI, 1, hI, 2..., hI, 16], i=
1,2 ..., M, wherein, i represents channel position, and M represents the quantity of passage.It can be calculated by using in the following manner on passage i
Instantaneous received power PiFor：During specific implementation, directly average received can be used as by the use of instantaneous received power
Power, multiple TTI instantaneous received power can also be filtered or smoothing processing after, to obtain mean receiving power.
Step S102, is that each user selects to be used for uplink demodulation according to the mean receiving power on each passage
Passage.
It is the passage that each user selects to demodulate for up channel in this step；The demodulation channel number of user can be
One or multiple；And the demodulation channel number of different user can be different；, can be according to each during specific implementation
The magnitude relationship of mean receiving power on passage determines to demodulate the number of passage, if for example, maximum mean receiving power
And secondary big mean receiving power is close to (both differences are less than given threshold), then select maximum corresponding with time big mean receiving power
Passage as the uplink demodulation passage of user, otherwise, only select the corresponding passage of maximum mean receiving power to be used as up solution
Adjust passage.
Step S103, calculates expectation received power of each user on all passages.
In this step, expectation received power of each user on all passages is calculated, the expectation received power is to other
The space division multiple access interference of user；Specifically include following steps：
In step S1031, the chip-level carrier/interface ratio needed according to the up channel being obtained ahead of time, and user's demodulation passage
ISCP, calculate user demodulation passage on expectation received power.
Step S1032, according to the mean receiving power of the user obtained in step step S1031 on the various channels, meter
Calculate the receiving power and the ratio of the mean receiving power on demodulation passage on user's non-demodulated passage.
Step S1033, expects to receive work(using the receiving power ratio and demodulation passage that obtain in step step S1032
Rate, calculates expectation received power of the user on non-demodulated passage, the expectation received power is the interference to other space divisions user
Power；
The chip-level carrier/interface ratio that up channel set in advance needs is expressed as CIR, the ISCP on each passage
(Interference Signal Code Power, interference code power) is expressed as ISCPi；I=1,2 ..., M, i be passage sequence
Number, M is total channel number.During specific implementation, if user uplink demodulates passage only one of which, then, can be by using
In the following manner calculates the expectation received power on the demodulation passage：P′i=CIRISCPi；If user uplink demodulation passage has N
It is individual, and N is more than 1, the set expression of demodulation passage is：Λ={ 1 ..., N }, then can calculate in the following manner on all
Expectation received power on row demodulation passage：
Wherein, P '1..., P 'NThe expectation received power on passage, P are demodulated for user uplink1..., PNFor user uplink
Demodulate the mean receiving power on passage.
During specific implementation, it is possible to use the expectation received power on user uplink demodulation passage, obtain on non-demodulated passage
Expectation received power P 'i, concrete mode is as follows：
Wherein, P 'jAnd PjThe expectation received power and mean receiving power on some demodulation passage, P are represented respectivelyiRepresent
Mean receiving power on non-demodulated passage i.
During specific implementation, for the constant up channel of code check, such as HS-SICH, its chip-level needed carries dry
Than that can be obtained by link simulation, it can also be obtained by the test result in actual outfield；For the variable up letter of code check
For road, such as E-PUCH is then needed according to actual bit rate, to calculate the chip-level carrier/interface ratio of its needs.
Step S104, according to expectation received power of each user on all passages, obtains each user in up solution
Adjust total jamming power of passage；And calculate total jamming power of each user and the user is obtained ahead of time in the uplink demodulation
The ratio of interference code power ISCP on passage, or, calculating total jamming power of each user with the user in the up solution
Adjust the ratio of the expectation received power on passage；When the ratio of all users is respectively less than predetermined threshold value, using space division
Multi-access mode is multiplexed to up channel.
In this step, when meeting up space division condition between user, up channel is answered using space division multiple access mode
With.Specifically, this step is comprised the steps of：
Step S101, the expectation received power of the other users received on passage is demodulated using user, the user is obtained
Demodulate total jamming power on passage；During specific implementation, user can be demodulated to the expectation of the other users received on passage
Receiving power is added, and to obtain the total jamming power being subject on user demodulation passage, can also be demodulated user on passage
Maximum in the expectation received power of the other users received, is used as total jamming power；
Total jamming power that step S1042, calculating user are subject to and the ISCP on user demodulation passage or expectation connect
The ratio of power is received, if ratio is less than predetermined threshold value Γ, then it represents that the user meets up space division condition；
If step S1043, all users are satisfied by the space division condition in step S1042, these users can be to this
Up channel carries out space division multiplexing.
Below with instantiation illustrate the present embodiments relate to the above method.
Embodiment 1：
Assuming that indoor distributed system has 4 passages, each passage covers a floor, has at two activation users, user 1
In the floor that passage 1 is covered, user 2 is in the floor that passage 4 is covered, and user uplink A-DPCH has letter for each TTI
Number, the up channel of space division multiple access multiplexing is HS-SICH；ISCP on each passage is expressed as：ISCPi, user 1 and use
Up A-DPCH of the family 2 on passage i channel estimation results are expressed as：
H1, i=[h1 I, 1, h1 I, 2... h1 I, 16], i=1,2,3,4；
H2, i=[h2 I, 1, h2 I, 2... h2 I, 16], i=1,2,3,4；
Step 1：Calculate the mean receiving power of user 1 and user 2 on the various channels： I=1,2,3,4；
Step 2：The corresponding passage of maximum mean receiving power is selected as its up HS-SICH for user 1 and user 2
Demodulation passage, in this example, the demodulation passage of user 1 is passage 1, and the demodulation passage of user 2 is passage 4；
Step 3：It is assumed that it is expected that carrier/interface ratio is CIR according to the default HS-SICH chip-levels of link simulation results, user is calculated
1 demodulates on passage the expectation received power of (in this example, the demodulation passage of user 1 is passage 1) at it：P′1,1=CIR
ISCP1, then, calculate user expectation received power on non-demodulated passage：I=2,3,4；Calculate user 2
The expectation received power for demodulating on passage (in this example, the demodulation passage of user 2 is passage 4) at it：P′2,4=CIRISCP4,
Then, user expectation received power on non-demodulated passage is calculated：I=1,2,3；So we just obtain
The expectation received power of user 1 and user 2 on the various channels, i.e.,：P′1, iWith P '2, i, i=1,2,3,4；
Step 4：Calculate user 1 demodulates the space division multiple access interference (total jamming power) that (passage 1) is subject on passage at it：
Total jamming power that user 1 is subject on passage 1 is exactly power of the user 2 on passage 1, i.e.,：I1,1=P '2,1；Calculate user 2
Demodulate (passage 4) space division multiple access for being subject on passage at it and disturb (total jamming power)：It is total that user 2 is subject on passage 4
Jamming power is exactly power of the user 1 on passage 4, i.e.,：I2,4=P 'Isosorbide-5-Nitrae；
Step 5：If user its demodulate passage on be subject to space division multiple access interference with the ISCP phases on the passage
Than less than some thresholding Γ, i.e.,：AndThen the user 1 and user 2 can enter to HS-SICH code channels
Row space division multiplexing, otherwise, user 1 and user 2 can not carry out space division multiplexing to up HS-SICH code channels.
Embodiment 2：
Assuming that indoor distributed system has 4 passages, each passage covers a floor, there is two activation users, and up
A-DPCH has signal for each TTI, and user 1 is in the overlapping region that passage 1 and passage 2 are covered, and user 2 is covered in passage 4
In the floor of lid, user uplink A-DPCH has signal for each TTI, and the channel of space division multiple access multiplexing is HS-SICH；Each leads to
ISCP on road is expressed as：ISCPi, the up A-DPCH of user 1 and user 2 on passage i channel estimation results point
It is not expressed as：
H1, i=[h1 I, 1, h1 I, 2... h1 I, 16], i=1,2,3,4；
H2, i=[h2 I, 1, h2 I, 2... h2 I, 16], i=1,2,3,4；
Step 1：Calculate the mean receiving power of user 1 and user 2 on the various channels： I=1,2,3,4；
Step 2：Because the receiving power of user 1 on channels 1 and 2 is close, therefore, passage 1 and passage 2 are regard as user
1 up HS-SICH demodulation passages, user 2 selects the corresponding passage of maximum mean receiving power as its up HS-SICH's
Demodulate passage；
Step 3：It is assumed that it is expected that carrier/interface ratio is CIR according to the default HS-SICH chip-levels of link simulation results, and before
Calculate obtained P1, i, utilize equation：
Calculate user 1 and demodulate on passage the expectation received power of (the demodulation passage of user 1 is passage 1 and passage 2) at it
P′1,1With P '1,2；Then, user expectation received power on non-demodulated passage is calculated：I=3,4；Calculate and use
Family 2 demodulates on passage the expectation received power of (in this example, the demodulation passage of user 2 is passage 4) at it：P′2,4=CIR
ISCP4, then, calculate user expectation received power on non-demodulated passage：I=1,2,3；So we
The expectation received power of user 1 and user 2 on the various channels is just obtained, i.e.,：P′1, iWith P '2, i, i=1,2,3,4；
Step 4：The space division multiple access interference that (passage 1 and passage 2) is subject on its demodulation passage for calculating user 1 is (total dry
Disturb power)：Total jamming power that user 1 is subject on passage 1 is exactly power of the user 2 on passage 1, i.e.,：I1,1=P '2,1；
Total jamming power that user 1 is subject on passage 2 is exactly power of the user 2 on passage 2, i.e.,：I1,2=P '2,2；Calculate user 2
Demodulate (passage 4) space division multiple access for being subject on passage at it and disturb (total jamming power)：It is total that user 2 is subject on passage 4
Jamming power is exactly power of the user 1 on passage 4, i.e.,：I2,4=P 'Isosorbide-5-Nitrae；
Step 5：If user its demodulate passage on be subject to space division multiple access interference with the ISCP phases on the passage
Than less than some thresholding Γ, i.e.,： WithSet up simultaneously, then the user 1 and user 2 can
To carry out space division multiplexing to HS-SICH code channels, otherwise, user 1 and user 2 can not carry out space division to up HS-SICH code channels
Multiplexing.
In addition, as shown in figure 3, the embodiment of the present invention further relates to a kind of up space division multiple access realized for realizing the above method
Device, including：
Mean receiving power acquiring unit 201, for obtaining the mean receiving power of each user on the various channels；
Uplink demodulation channel selection unit 202, for being each use according to the mean receiving power on each passage
Family selects to be used for uplink demodulation passage；
Expectation received power computing unit 203, for calculating expectation received power of each user on all passages；
Up space division multiple access Multiplexing Unit 204, for the expectation received power according to each user on all passages, is obtained
Each user is taken in total jamming power of uplink demodulation passage；And calculate total jamming power of each user and the user obtains in advance
The interference code power ISCP on the uplink demodulation passage ratio, or, calculate total jamming power of each user with
The ratio of expectation received power of the user on the uplink demodulation passage；When the ratio of all users be respectively less than it is default
During threshold value, up channel is multiplexed using space division multiple access mode.
Wherein, mean receiving power acquiring unit 201 further comprises：
Channel estimation subelement 2011, in current transmission time interval TTI, believing with special physics user uplink
Road carries out channel estimation, and channel estimation results are：Hi=[hI, 1, hI, 2..., hI, 16], i=1,2 ..., M；
Instantaneous received power computation subunit 2022, for calculating the instantaneous received power on passage i：
Mean receiving power obtains subelement 2023, for regarding the instantaneous received power as mean receiving power；Or,
Multiple TTI instantaneous received power is filtered or smoothing processing after, obtain the mean receiving power.
Wherein, uplink demodulation channel selection unit 202 further comprises：
Judgment sub-unit 2021, for judging whether maximum mean receiving power and the difference of time big mean receiving power are less than
Given threshold；
Subelement 2022 is selected, for judging maximum mean receiving power and time big average received in judgment sub-unit 2021
When the difference of power is less than given threshold, the passage corresponding to the maximum mean receiving power of selection and time big mean receiving power is made
For the uplink demodulation passage of the user；And, judge that maximum mean receiving power averagely connects greatly with secondary in judgment sub-unit 2021
When the difference for receiving power is not less than given threshold, the corresponding passage of the maximum mean receiving power is selected to be used as the up of the user
Demodulate passage.
Wherein, expectation received power computing unit 203 further comprises：
Demodulate passage expectation received power and obtain subelement 2031, for the code needed according to the up channel being obtained ahead of time
ISCP on chip level carrier interference ratio C/I R, and each user's demodulation passage, calculates expectation of each user on demodulation passage and receives
Power；
Non-demodulated passage expectation received power obtains subelement 2032, for according to each user on the various channels flat
Equal receiving power, calculates the receiving power and the ratio of the mean receiving power on demodulation passage on each user's non-demodulated passage
Value；According to the receiving power on each user's non-demodulated passage and the ratio of the mean receiving power on demodulation passage, and often
Expectation received power of the individual user on demodulation passage, calculates expectation received power of each user on non-demodulated passage.
As can be seen from the above-described embodiment, the present invention is by obtaining mean receiving power, expectation received power, always disturbing work(
Rate judges to be multiplexed up channel using space division multiple access mode, can be by obtaining the disturbed condition between user, and then sentences
It is disconnected whether to carry out space division multiplexing to up channel, thus, it is possible to obtain the systematicness that isolation good between user is brought
Can gain, raising system effectiveness.
Although for example purpose, having been disclosed for the preferred embodiments of the present invention, those skilled in the art will recognize
Various improvement, increase and substitution are also possible, and therefore, the scope of the present invention should be not limited to above-described embodiment.
Claims (8)
1. a kind of method for realizing up space division multiple access, it is characterised in that the described method comprises the following steps：
Obtain the mean receiving power of each user on the various channels；
It is that each user selects to be used for uplink demodulation passage according to the mean receiving power on each passage；
Calculate expectation received power of each user on all passages；
According to expectation received power of each user on all passages, total interference of each user in uplink demodulation passage is obtained
Power；And calculate the interference code on the uplink demodulation passage that total jamming power of each user and the user are obtained ahead of time
Power ISCP ratio, or, calculating total jamming power and expectation of the user on the uplink demodulation passage of each user
The ratio of receiving power；
When the ratio of all users is respectively less than predetermined threshold value, up channel is answered using space division multiple access mode
With；
Wherein, expectation received power of each user on all passages is calculated, following steps are specifically included：
ISCP on the chip-level carrier interference ratio C/I R needed according to the up channel being obtained ahead of time, and each user's demodulation passage,
Calculate expectation received power of each user on demodulation passage；
According to the mean receiving power of each user on the various channels, the receiving power on each user's non-demodulated passage is calculated
With the ratio of the mean receiving power on demodulation passage；
According to the receiving power on each user's non-demodulated passage and the ratio of the mean receiving power on demodulation passage, and often
Expectation received power of the individual user on demodulation passage, calculates expectation received power of each user on non-demodulated passage；
Total jamming power of each user in uplink demodulation passage is obtained, following steps are specifically included：
The expectation received power of the other users received according to user on uplink demodulation passage, obtains the user up
Demodulate total jamming power of passage.
2. the method for up space division multiple access is realized as claimed in claim 1, it is characterised in that obtain each user logical at each
Mean receiving power on road, is specifically included：
In current transmission time interval TTI, channel estimation, channel estimation results are carried out to user uplink following special physical channel
HiFor：Hi=[hi,1,hi,2,...,hi,16], i=1,2 ..., M；Wherein, i represents channel position, and M represents the quantity of passage；
Calculate the instantaneous received power P on passage iiFor：
It regard the instantaneous received power as mean receiving power；Or, multiple TTI instantaneous received power is filtered or
After smoothing processing, the mean receiving power is obtained.
3. the method for up space division multiple access is realized as claimed in claim 1, it is characterised in that according on each passage
Mean receiving power, is that each user selects to be used for uplink demodulation passage, specifically includes following steps：
Judge whether maximum mean receiving power and the difference of time big mean receiving power are less than given threshold, if it is, selection
Passage corresponding to maximum mean receiving power and time big mean receiving power as the uplink demodulation passage of the user, if
It is no, then the corresponding passage of the maximum mean receiving power is selected as the uplink demodulation passage of the user.
4. the method for up space division multiple access is realized as claimed in claim 1, it is characterised in that
If user uplink demodulation passage has one, expectation received power P of the user on uplink demodulation passagei' be：Pi′
=CIRISCPi；Wherein, the ISCP on each passage is expressed as ISCPi；I=1,2 ..., M, i be channel position, M is total
Channel number；
If user uplink demodulation passage has N number of, and N is more than 1, and the set expression of demodulation passage is：Λ={ 1 ..., N }, that
Expectation received power of the user on all uplink demodulation passages be：
Wherein, P1′,...,P′NFor expectation received power of the user on uplink demodulation passage, P1,...,PNFor on the user
Mean receiving power on row demodulation passage.
5. the method for up space division multiple access is realized as claimed in claim 4, it is characterised in that
Expectation received power P of the user on non-demodulated passage ii' be：
Wherein, Pj' and PjThe expectation received power and mean receiving power on demodulation passage j, P are represented respectivelyiRepresent that non-demodulated is led to
Mean receiving power on road i.
6. a kind of device for realizing up space division multiple access, it is characterised in that described device includes：
Mean receiving power acquiring unit, for obtaining the mean receiving power of each user on the various channels；
Uplink demodulation channel selection unit, for according to the mean receiving power on each passage, being each user's selection
For uplink demodulation passage；
Expectation received power computing unit, for calculating expectation received power of each user on all passages；
Up space division multiple access Multiplexing Unit, for the expectation received power according to each user on all passages, obtains each
Total jamming power of the user in uplink demodulation passage；And calculate total jamming power of each user and the user is obtained ahead of time
The ratio of interference code power ISCP on the uplink demodulation passage, or, calculating total jamming power and user of each user
The ratio of expectation received power on the uplink demodulation passage；When the ratio of all users is respectively less than predetermined threshold value
When, up channel is multiplexed using space division multiple access mode；
Wherein, the expectation received power computing unit further comprises：
Demodulate passage expectation received power and obtain subelement, the chip-level for being needed according to the up channel being obtained ahead of time carries dry
Than CIR, and the ISCP on each user's demodulation passage, calculate expectation received power of each user on demodulation passage；
Non-demodulated passage expectation received power obtains subelement, for the average received work(according to each user on the various channels
Rate, calculates the receiving power and the ratio of the mean receiving power on demodulation passage on each user's non-demodulated passage；According to every
Receiving power and the ratio of the mean receiving power on demodulation passage on individual user's non-demodulated passage, and each user is in solution
The expectation received power on passage is adjusted, expectation received power of each user on non-demodulated passage is calculated；
The up space division multiple access Multiplexing Unit, specifically for the other users received according to user on uplink demodulation passage
Expectation received power, obtain total jamming power of the user in uplink demodulation passage.
7. the device of up space division multiple access is realized as claimed in claim 6, it is characterised in that the mean receiving power is obtained
Unit further comprises：
Channel estimation subelement, in current transmission time interval TTI, believing user uplink following special physical channel
Estimate that channel estimation results are in road：Hi=[hi,1,hi,2,...,hi,16], i=1,2 ..., M；
Instantaneous received power computation subunit, for calculating the instantaneous received power on passage i：
Mean receiving power obtains subelement, for regarding the instantaneous received power as mean receiving power；Or, to multiple
TTI instantaneous received power be filtered or smoothing processing after, obtain the mean receiving power.
8. the device of up space division multiple access is realized as claimed in claim 6, it is characterised in that the uplink demodulation channel selecting
Unit further comprises：
Judgment sub-unit, for judging whether maximum mean receiving power and the difference of time big mean receiving power are less than setting threshold
Value；
Subelement is selected, the difference for judging maximum mean receiving power and time big mean receiving power in the judgment sub-unit
During less than given threshold, the passage corresponding to the maximum mean receiving power of selection and time big mean receiving power is used as the user
Uplink demodulation passage；And, the judgment sub-unit judge maximum mean receiving power and time big mean receiving power it
When difference is not less than given threshold, the corresponding passage of the maximum mean receiving power is selected to lead to as the uplink demodulation of the user
Road.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101267235A (en) * | 2007-03-16 | 2008-09-17 | 大唐移动通信设备有限公司 | A method and device for realizing space division multiplexing |
| CN101420703A (en) * | 2007-10-22 | 2009-04-29 | 中兴通讯股份有限公司 | Method for implementing space division multiple access by TD-SCDMA indoor distribution system |
| CN101964987A (en) * | 2009-07-24 | 2011-02-02 | 大唐移动通信设备有限公司 | Multi-user space division judgment method and equipment |
| CN102104944A (en) * | 2009-12-17 | 2011-06-22 | 电信科学技术研究院 | Space division judgment method and base station |
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| US20110019573A1 (en) * | 2008-03-03 | 2011-01-27 | Runcom Technologies Ltd. | Low complexity user selection for sdma |
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| CN101267235A (en) * | 2007-03-16 | 2008-09-17 | 大唐移动通信设备有限公司 | A method and device for realizing space division multiplexing |
| CN101420703A (en) * | 2007-10-22 | 2009-04-29 | 中兴通讯股份有限公司 | Method for implementing space division multiple access by TD-SCDMA indoor distribution system |
| CN101964987A (en) * | 2009-07-24 | 2011-02-02 | 大唐移动通信设备有限公司 | Multi-user space division judgment method and equipment |
| CN102104944A (en) * | 2009-12-17 | 2011-06-22 | 电信科学技术研究院 | Space division judgment method and base station |
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