CN104348517B - A kind of method and device for offsetting multi-access inference - Google Patents
A kind of method and device for offsetting multi-access inference Download PDFInfo
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Abstract
The invention discloses a kind of method and device for offsetting multi-access inference, belong to field of signal processing.Methods described includes：Firstth, the transmission signal of N number of user equipment is received；Secondth, reference signal corresponding to user equipment is obtained；3rd, transmission signal and reference signal are subjected to matched filtering processing, obtain mark ID, signal original position and the signal strength parameter of n user equipment；4th, according to signal strength parameter, M user equipment is selected from n user equipment；5th, using the signal original position and corresponding reference signal generation Interference Cancellation reference signal of M user equipment, multi-access inference caused by M user equipment is balanced out from transmission signal using Interference Cancellation reference signal；6th, judge whether flow continues according to preparatory condition, if continuing, using the transmission signal of the 5th step output as input, return and perform second step, otherwise end operation.The present invention can improve the efficiency for offsetting multi-access inference and reduce error.
Description
Technical field
The present invention relates to field of signal processing, more particularly to a kind of method and device for offsetting multi-access inference.
Background technology
In CDMA（Code Division Multiple Access, CDMA）In system, because cdma system uses
Spreading code set can not realize strict orthogonal, cause strong signal to weak signal produce inhibitory action, for weak signal,
Strong signal is the multi-access inference of weak signal.So when receiving terminal receives multiple UE（User Equipment, user equipment）Hair
After the transmission signal penetrated the processing that transmission signal offset multi-access inference is received, it is necessary to dock.
Prior art provides the following two kinds method to the transmission signal of reception offset the processing of multi-access inference, bag
Include：
Firstth, to the transmission signal of reception offset the processing of multi-access inference using the method for counteracting serial interference,
Can be：Matched filtering is carried out to reference signal corresponding to the transmission signal of reception and multiple UE by matched filtering group, obtained
Multiple UE signal strength parameter and signal original position；The maximum UE of selection signal intensive parameter, according to the UE of selection letter
Number original position and corresponding reference signal, estimate Interference Cancellation reference signal；Using the Interference Cancellation reference signal, from connecing
The UE that selection is offset in the transmission signal of receipts produces multi-access inference.By reference signal corresponding to the transmission signal after counteracting and UE again
It is input in matched filtering group and repeats said process untill when offsetting multi-access inference caused by each UE.
Secondth, to the transmission signal of reception offset the processing of multi-access inference using the method for Parallel Interference Cancellation,
Can be：Matched filtering is carried out to reference signal corresponding to the transmission signal of reception and multiple UE by matched filtering group, obtained
Multiple UE signal strength parameter and signal original position.If multiple UE that matched filtering obtains do not include required
UE, the then multiple UE obtained according to matched filtering signal strength parameter and signal original position, estimate Interference Cancellation reference
Signal；Using the Interference Cancellation reference signal, it is more that multiple UE generations that matched filtering obtains are offset from the transmission signal of reception
Disturb location.
During the present invention is realized, inventor has found that prior art at least has problems with：
For the above-mentioned method serially offset, a UE is balanced out from the transmission signal of reception every time caused by multiple access do
Disturb, cause to offset the less efficient of multi-access inference.
For the above-mentioned method offset parallel, the whole that matched filtering obtains disposably is offset from the transmission signal of reception
Multi-access inference caused by UE, very big error can be brought into.
The content of the invention
In order to improve the efficiency and reduction error of offsetting multi-access inference, the invention provides a kind of counteracting multi-access inference
Method and device.The technical scheme is as follows：
A kind of method for offsetting multi-access inference, methods described include：
Firstth, the transmission signal of N number of user equipment is received；
Secondth, reference signal corresponding to user equipment is obtained；
3rd, the transmission signal and the reference signal are subjected to matched filtering processing, obtain the mark of n user equipment
Know ID, signal original position and signal strength parameter, wherein n and be less than or equal to N；
4th, according to the signal strength parameter, M user equipment is selected from the n user equipment；
5th, the signal original position of the M user equipment and corresponding reference signal generation Interference Cancellation ginseng are utilized
Signal is examined, is balanced out using the Interference Cancellation reference signal from the transmission signal more caused by the M user equipment
Disturb location；
6th, judge whether flow continues according to preparatory condition, if continue, using the 5th step output transmission signal as
Input, return and perform second step, otherwise end operation.
A kind of device for offsetting multi-access inference, described device include：
Receiving module, for receiving the transmission signal of N number of user equipment；
Acquisition module, for obtaining reference signal corresponding to user equipment；
The acquisition module, for the transmission signal and the reference signal to be carried out into matched filtering processing, obtain n
Mark ID, signal original position and the signal strength parameter of user equipment, wherein n are less than or equal to N；
Selecting module, for according to the signal strength parameter, M user equipment to be selected from the n user equipment；
Cancellation module, it is dry for the signal original position using the M user equipment and the generation of corresponding reference signal
Counteracting reference signal is disturbed, the M user equipment is balanced out from the transmission signal using the Interference Cancellation reference signal
Caused multi-access inference；
Judge module, according to preparatory condition judge whether flow continues, if continuing, the transmission signal that the 5th step is exported
As input, return and perform the acquisition module, otherwise end operation.
In embodiments of the present invention, due to carrying out matched filtering processing to transmission signal and reference signal, n user is obtained
The signal original position and signal intensity of equipment, M user equipment is selected according to signal strength parameter, according to M user equipment
Signal original position and corresponding reference signal generation Interference Cancellation reference signal, using the Interference Cancellation reference signal, support
Disappear multiple access interference signal caused by M user equipment, judges whether flow continues according to preparatory condition, if continuing, will offset
Transmission signal afterwards continues executing with above-mentioned flow as input, is missed so as to improve to offset the efficiency of multi-access inference and reduce
Difference.
Brief description of the drawings
Fig. 1 is a kind of method flow diagram for counteracting multi-access inference that the embodiment of the present invention 1 provides；
Fig. 2-1 is a kind of method flow diagram for counteracting multi-access inference that the embodiment of the present invention 2 provides；
Fig. 2-2 is a kind of mixed signal structural representation that the embodiment of the present invention 2 provides；
Fig. 2-3 is a kind of structure of arrays schematic diagram that the embodiment of the present invention 3 provides；
Fig. 2-4 is another structure of arrays schematic diagram that the embodiment of the present invention 2 provides；
Fig. 3-1 is a kind of method flow diagram for counteracting multi-access inference that the embodiment of the present invention 3 provides；
Fig. 3-2 is a kind of structure of arrays schematic diagram that the embodiment of the present invention 3 provides；
Fig. 3-3 is another structure of arrays schematic diagram that the embodiment of the present invention 3 provides；
Fig. 4 is a kind of apparatus structure schematic diagram for counteracting multi-access inference that the embodiment of the present invention 4 provides.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment 1
The embodiments of the invention provide a kind of method for offsetting multi-access inference, referring to Fig. 1, this method includes：
Step 101：Receive the transmission signal of N number of user equipment；
Step 102：Obtain reference signal corresponding to user equipment；
Step 103：The transmission signal of reception and the reference signal obtained are subjected to matched filtering processing, obtain n user
The ID of equipment（Identify, mark）, signal original position and signal strength parameter, wherein n be less than or equal to N；
Step 104：According to signal strength parameter, M user equipment is selected from n user equipment；
Step 105：Utilize the signal original position of M user equipment and the generation Interference Cancellation reference of corresponding reference signal
Signal, multi-access inference caused by M user equipment is balanced out from the transmission signal of reception using the Interference Cancellation reference signal；
Step 106：Judge whether flow continues according to preparatory condition, if continuing, the transmission signal that step 105 is exported
As input, return and perform step 102, otherwise end operation.
In embodiments of the present invention, due to carrying out matched filtering processing to transmission signal and reference signal, n user is obtained
The signal original position and signal intensity of equipment, M user equipment is selected according to signal strength parameter, according to M user equipment
Signal original position and corresponding reference signal generation Interference Cancellation reference signal, using the Interference Cancellation reference signal, support
Disappear multiple access interference signal caused by M user equipment, judges whether flow continues according to preparatory condition, if continuing, will offset
Transmission signal afterwards continues executing with above-mentioned flow as input, is missed so as to improve to offset the efficiency of multi-access inference and reduce
Difference.
Embodiment 2
On the basis of embodiment 1, the embodiments of the invention provide a kind of method for offsetting multi-access inference.
In embodiments of the present invention, receiving terminal can receive the transmission signal of N number of UE transmittings, by N number of UE transmission signal
Reference signal corresponding with N number of UE carries out matched filtering processing, obtains n UE ID, signal original position and signal intensity ginseng
Number, M maximum UE of selection signal intensive parameter, done using M UE signal original position and the generation of corresponding reference signal
Disturb counteracting reference signal, from the transmission signal of reception balance out M UE using Interference Cancellation reference signal caused by multiple access do
Disturb.
Referring to Fig. 2-1, this method includes：
Step 201：Receive N number of UE transmission signal；
Wherein, in cdma system, receiving terminal can correspond to N number of UE, and N is the integer more than 2, and N number of UE can be to receiving terminal
Launch transmission signal.For example, positioning indoors in application scenarios, receiving terminal can be the node for needing to position, and receiving terminal is corresponding
UE can be reference mode known to indoor location, N is the quantity of reference mode.For another example, in wireless communications application scene,
Receiving terminal can be base station, and UE corresponding to receiving terminal can be the UE of access base station, and N is the UE of access base station quantity.
It should be noted that：Each UE in N number of UE may be different apart from the distance of receiving terminal, and each UE transmission power
It is identical.In a cdma system, the signal intensity of the transmission signal of the receiving terminal reception UE transmitting near apart from its is stronger, receives distance
The signal intensity of the transmission signal of its remote UE transmitting is weaker.Because strong signal has obvious inhibitory action to weak signal, make
Obtain in the transmission signal of reception, the transmission signal of the UE near apart from receiving terminal transmittings receives the UE remote apart from its to receiving terminal and sent out
The transmission signal penetrated produces multi-access inference.
Further, receiving terminal can be previously stored the ID and reference signal of each UE corresponding to it.Preferably, receive
Each UE ID and reference signal can be stored in UE ID and the corresponding relation of reference signal corresponding to end.
Wherein, UE ID and the corresponding relation of reference signal can be configured to obtain by technical staff in advance.For receiving terminal
Any one corresponding UE, technical staff can gather signal corresponding to the UE in advance, the reference using the signal of collection as the UE
Signal, the ID of the UE and reference signal are stored in the UE of receiving terminal ID and the corresponding relation of reference signal；By above-mentioned side
The ID of each UE in N number of UE and reference signal are stored in the UE ID and the corresponding relation of reference signal of receiving terminal by formula.
For example, in a cdma system, corresponding 7 UE of receiving terminal, respectively UE1, UE2, UE3, UE4, UE5, UE6 and UE7.
Technical staff can gather reference signal S3, UE4 of reference signal S2, UE3 of UE1 reference signal S1, UE2 respectively in advance
The reference signal S6 and UE7 of reference signal S5, UE6 of reference signal S4, UE5 reference signal S7, respectively by seven UE's
ID and reference signal are stored with UE as shown in table 1 ID and the corresponding relation of reference signal.
Table 1
| UE ID | Reference signal |
| ID1 | S1 |
| ID2 | S2 |
| ID3 | S3 |
| ID4 | S4 |
| ID5 | S5 |
| ID6 | S6 |
| ID7 | S7 |
Wherein, 7 UE launch transmission signal to receiving terminal, and correspondingly, receiving terminal receives the transmission signal of 7 UE.
Step 202：Obtain reference signal corresponding to UE；
Specifically, it is corresponding with reference to letter that each UE is obtained in the corresponding relation from the UE stored ID with reference signal
Number.
Step 203：The transmission signal of reception and the reference signal obtained are subjected to matched filtering processing, n UE's of acquisition
ID, signal original position and signal strength parameter；
Specifically, it is corresponding for any one UE obtained in the corresponding relation from the UE stored ID with reference signal
Reference signal, the transmission signal of reception and the reference signal are subjected to matched filtering processing, obtain what is matched with the reference signal
One signal, the signal strength parameter and signal original position of the signal are obtained, by the signal strength parameter and signal of the signal
Original position respectively as the UE signal strength parameter and signal original position, and from the UE stored ID with reference to believing
Number corresponding relation in obtain the ID of the UE, so obtain ID, signal original position and the signal strength parameter of the UE；For it
His each UE in a manner described, finally gets n UE ID, signal original position and signal strength parameter, wherein, n is small
In or equal to N.
It should be noted that：The either signal included for the transmission signal entirely received, the signal are entirely receiving
A period of time is taken in transmission signal, the signal is in the signal that the initial time in the transmission signal entirely received is the signal
Original position.Referring to Fig. 2-2, a period of time that signal 1 takes in the transmission signal entirely received is T1 to T2, wherein, T1
For initial time of the signal 1 in the transmission signal entirely received, T2 is end of the signal 1 in the transmission signal entirely received
Time, the signal original position of signal 1 is initial time T1.Wherein, the signal original position of signal can be the test of signal
Value or delay points etc..
Preferably, receiving terminal can use matched filtering group to the transmission signal of reception and the reference signal obtained progress
With filtering process, matched filtering group can include N number of matched filtering unit, Ke Yiwei：
Receiving terminal selects a matched filtering unit from matched filtering group, by reference signal corresponding to any one UE and connects
The transmission signal of receipts is input to the matched filtering unit.The matched filtering unit enters to the transmission signal of reception with the reference signal
Row matched filtering is handled, and obtains the signal strength parameter and signal original position of the UE.
For example, obtain its corresponding UE1's in corresponding relation of the receiving terminal from UE as shown in table 1 ID with reference signal
ID1 and reference signal S1, the transmission signal of reception and reference signal S1 are subjected to matched filtering processing, obtained and reference signal
The signal 1 of S1 matchings, obtains the signal strength parameter and signal original position 7 of signal 1, and ID1, the signal for so obtaining UE1 are strong
Spend parameter and signal original position 7.For other six UE, receiving terminal all finally gets UE2 ID2, letter in a manner described
Number intensive parameter and signal original position 5, UE3 ID3, signal strength parameter and signal original position 10, UE4 ID4, signal
Intensive parameter and signal original position 5, UE5 ID5, signal strength parameter and signal original position 9 and UE6 ID6, signal
Intensive parameter and signal original position 10.
Step 204：According to signal strength parameter, the M UE of selection signal maximum intensity from n UE；
Wherein, because the UE near apart from the receiving terminal transmission signal launched is adjusted the distance the transmitting letter of the remote UE transmittings of receiving terminal
Number there is obvious inhibitory action, so needing M maximum UE of selection signal intensive parameter, and pass through subsequent step 205 and 206
Multi-access inference caused by the UE of selection is offset from the transmission signal of reception.M is default value.
Further, M UE of selection ID, signal strength parameter and signal original position can also be stored.
Wherein, the multi-access inference being subject to due to the transmission signal of M maximum UE of signal strength parameter is smaller, therefore can be with
M UE of selection ID, signal strength parameter and signal original position is stored, so as to ID of the receiving terminal according to the UE of storage, letter
Number intensive parameter and signal original position carry out concrete application.For example, positioning indoors in application scenarios, receiving terminal can basis
The UE of storage ID and signal strength parameter positions to itself.For another example, in wireless communications application scene, receiving terminal can be with
According to the UE of storage ID and signal original position, the transmission signal that the UE of storage launches is received.
For example, it is assumed that M is 3,3 maximum UE of selection signal intensive parameter, respectively UE1, UE2 and UE3.
Step 205：Utilize M UE of selection signal original position and the generation Interference Cancellation reference of corresponding parameter signal
Signal；
Specifically, from the UE stored ID and the corresponding relation of reference signal, in the M UE ID for obtaining selection
Reference signal corresponding to each UE ID, that is, obtain reference signal corresponding to M UE；According to each UE signal original position,
Linear superposition is carried out to reference signal corresponding to each UE, obtains Interference Cancellation parameter signal.
Preferably, according to each UE signal original position, linear superposition is carried out to reference signal corresponding to each UE, obtained
To the operation of Interference Cancellation parameter signal, Ke Yiwei：
According to each UE signal original position, obtain each UE corresponding to the signal of signal element that includes of reference signal
Original position；Signal original position identical signal element is added up, obtains accumulated value corresponding to the signal original position,
Wherein, in this step, all signal original position identical signal elements are all added up, obtains all signal start bits
Put corresponding accumulated value；Accumulated value corresponding to all signal original positions is combined into Interference Cancellation reference signal.
Preferably, all signal original position identical signal elements are all added up, obtains all signal start bits
The operation of accumulated value, Ke Yiwei corresponding to putting：
Create an array, each UE to should a line for including of array, the columns of the array is more than or equal to M UE's
The length sum of peak signal original position and reference signal in signal original position subtracts one, is referred to according to corresponding to each UE
The signal original position for the signal element that signal includes, filled respectively in row corresponding to each UE corresponding to each UE with reference to letter
Number signal element included, wherein, the signal element that each row in the array include all is signal original position identical letter
Number element；The signal element included to each row of the array is added up to obtain and added up corresponding to all signal original positions
Value.
Preferably, the peak signal original position that the columns of the array is more than or equal in M UE signal original position
Subtract one with the length sum of reference signal and less than or equal to the length of the transmission signal received.
For example, according to UE1 ID1, UE2 ID2 and UE3 ID3, believe respectively from UE as shown in table 1 ID with reference
Number corresponding relation in obtain UE1 corresponding to reference signal corresponding to reference signal S2 and UE3 corresponding to reference signal S1, UE2
S3.Assuming that the length of each reference signal is 5, the length of the transmission signal of reception is 20, i.e., each reference signal includes 5 letters
Number element, the transmission signal of reception include 20 signal elements.
Wherein, 5 signal elements that reference signal S1 includes are respectively S11, S12, S13, S14 and S15, reference signal S2
Including 5 signal elements be respectively S21, S22, S23, S24 and S25,5 signal elements that reference signal S3 includes are respectively
S31, S32, S33, S34 and S35.
According to UE1 signal original position 7, the signal original position for the signal element S11 that acquisition reference signal S1 includes
7th, the signal starting of signal element S12 signal original position 8, signal element S13 signal original position 9, signal element S14
Position 10 and signal element S15 signal original position 11.According to UE2 signal original position 5, obtaining reference signal S2 includes
Signal element S21 signal original position 5, signal element S22 signal original position 6, signal element S23 signal starting
The signal original position 9 of position 7, signal element S24 signal original position 8 and signal element S25.Risen according to UE3 signal
Beginning position 10, obtain the signal original position 10 for the signal element S31 that reference signal S3 includes, signal element S32 signal rises
Beginning position 11, signal element S33 signal original position 12, signal element S34 signal original position 13 and signal element S35
Signal original position 14.
Create array as Figure 2-3, in the array, UE1 to should the first row of array, UE2 to should array
The second row and UE3 to should array the third line, the columns j of the array is more than or equal to the first numerical value 14 and is less than or waits
In the length 20 of mixed signal, the first numerical value 14 be by the peak signal original position 10 in M UE signal original position with
The sum 15 of length 5 of reference signal subtracts one and obtained；Assuming that the columns j of the array is 14.
Referring to Fig. 2-3, according to the reference signal S1 signal element S11 included signal original position 7, signal element S12
Signal original position 8, signal element S13 signal original position 9, signal element S14 signal original position 10 and signal
The signal original position 11 of element S 15, in the first row corresponding to UE1 fill reference signal S1 include S11, S12, S13,
Five signal elements of S14 and S15.According to the reference signal S2 signal element S21 included signal original position 5, signal element
S22 signal original position 6, signal element S23 signal original position 7, signal element S24 signal original position 8 and letter
The signal original position 9 of number element S 25, filled in the second row corresponding to UE2 S21, S22, S23 that reference signal S2 includes,
Five signal elements of S24 and S25.According to the reference signal S3 signal element S31 included signal original position 10, signal element
S32 signal original position 11, signal element S33 signal original position 12, the signal element S34 and of signal original position 13
Signal element S35 signal original position 14, in the third line corresponding to UE3 fill reference signal S3 include S31, S32,
Five signal elements of S33, S34 and S35.
In the array shown in Fig. 2-3, the signal element that each row of the array include all is that signal original position is identical
Signal element.Added up to obtain accumulated value difference corresponding to all signal original positions to each signal element included that arranges
For A（1）、A（2）、……、A（14）, accumulated value corresponding to all signal original positions is combined into Interference Cancellation reference signal A
（1）A（2）……A（14）.
Step 206：Using the Interference Cancellation reference signal, multi-access inference caused by M UE is offset from transmission signal；
Specifically, the Interference Cancellation reference signal is subtracted from transmission signal, M UE is offset from transmission signal to realize
Caused multi-access inference.
For example, Interference Cancellation reference signal A is subtracted from transmission signal（1）A（2）……A（14）, believed with realizing from transmitting
Multi-access inference caused by UE1, UE2 and UE3 is offset in number.
Step 207：Judge whether flow continues according to preparatory condition, if continuing, the transmission signal that step 206 is exported
As input, return to step 202, otherwise end operation.
Specifically, if n is more than M, judge flow continue, if n is less than or equal to M, judge flow not after
It is continuous.
For example, obtaining 6 UE ID, signal strength parameter and signal original position, i.e. n is 6 and more than 3, i.e. n is more than M,
Judge that flow continues, it is corresponding with reference signal from UE as shown in table 1 ID using the transmission signal after counteracting as input
UE4 ID4 and reference signal S4 is obtained in relation, transmission signal and reference signal S4 are subjected to matched filtering processing, obtain with
Reference signal S4 matching signal 4, obtain signal 4 signal strength parameter and signal original position 4, so obtain UE ID4,
Signal strength parameter and signal original position 4.For other UE5, UE6 and UE7 all in a manner described, obtain UE5 ID5,
Signal strength parameter and signal original position 8, UE6 ID6, signal strength parameter and signal original position 7 and UE7 ID7,
Signal strength parameter and signal original position 15.
Selection signal intensive parameter maximum 3 UE, respectively UE4, UE5 and UE6 of signal 4.According to the UE4's of selection
ID4, UE5 ID5 and UE6 ID6, obtain UE4 pairs from UE as shown in table 1 ID and the corresponding relation of reference signal respectively
Reference signal S6 corresponding to reference signal S5 and UE6 corresponding to reference signal S4, UE5 answered.
Assuming that 5 signal elements that reference signal S4 includes are respectively S41, S42, S43, S44 and S45, reference signal S5
Including 5 signal elements be respectively S51, S52, S53, S54 and S55,5 signal elements that reference signal S6 includes are respectively
S61, S62, S63, S64 and S65.
According to UE4 signal original position 4, the signal original position for the signal element S41 that acquisition reference signal S4 includes
4th, the signal starting of signal element S42 signal original position 5, signal element S43 signal original position 6, signal element S44
Position 7 and signal element S45 signal original position 8.According to UE5 signal original position 8, obtain what reference signal S5 included
Signal element S51 signal original position 8, signal element S52 signal original position 9, signal element S53 signal start bit
Put 10, signal element S54 signal original position 11 and signal element S55 signal original position 12.Originated according to UE6 signals
Position 7, obtain the signal element S61 that reference signal S6 includes signal original position 7, signal element S62 signal start bit
Put the signal of 8, signal element S63 signal original position 9, signal element S64 signal original position 10 and signal element S65
Original position 11.
Create array as in Figure 2-4, in the array, UE4 to should the first row of array, UE5 to should array
The second row and UE6 to should array the third line, the array columns 12.
Originated according to the reference signal S4 signal element S41 included signal original position 4, signal element S42 signal
Position 5, signal element S43 signal original position 6, signal element S44 signal original position 7 and signal element S45 letter
Number original position 8, five letters of S41, S42, S43, S44 and S45 that reference signal S4 includes are filled in the first row corresponding to UE4
Number element.According to the reference signal S5 signal element S51 included signal original position 8, signal element S52 signal start bit
Put the letter of 9, signal element S53 signal original position 10, signal element S54 signal original position 11 and signal element S55
Number original position 12, S51, S52, S53, S54 and S55 five that reference signal S5 includes is filled in the second row corresponding to UE5
Signal element；Originated according to the reference signal S6 signal element S61 included signal original position 7, signal element S62 signal
Position 8, signal element S63 signal original position 9, signal element S64 signal original position 10 and signal element S65 letter
Number original position 11, S61, S62, S63, S64 and S65 five that reference signal S6 includes is filled in the third line corresponding to UE6
Signal element.
In the array shown in Fig. 2-4, the signal original position for the signal element that each row include is identical, and each row are wrapped
The signal element included is added up to obtain accumulated value, respectively A corresponding to all signal original positions（1）、A（2）、……、A
（12）, accumulated value corresponding to all signal original positions is combined into Interference Cancellation reference signal A（1）A（2）……A（12）.From
Interference Cancellation reference signal A is subtracted in transmission signal（1）A（2）……A（12）, with from transmission signal offset UE4, UE5 and
Multi-access inference caused by UE6.Wherein, the transmission signal after corresponding counteracting and reference signal carry out matched filtering processing, obtain one
Individual UE7 ID, signal strength parameter and signal original position, i.e. n are and are less than M, therefore end operation.
Further, when first time the transmission signal of reception and the reference signal obtained being carried out into matched filtering processing,
The initial value of matched filtering series can also be set, and matched filtering series is used to represent time for carrying out transmission signal matched filtering
Number.For example, the initial value that can set matched filtering series is 1 etc., that is, represent the transmission signal of reception and acquisition for the first time
Reference signal carries out matched filtering processing.
Wherein, technical staff can configurations match filters series and M corresponding relation in receiving terminal in advance.Technical staff
Multiple matched filtering series can be set, and be M values corresponding to each matched filtering series, by each matched filtering sum of series
M values corresponding to each matched filtering series are stored in matched filtering series and M corresponding relation.
Further, can also be according to matched filtering series, from the matched filtering stored before step 204 is performed
Series and the corresponding M of acquisition in M corresponding relation, then step 204 is performed by the M of acquisition.
Further, after determining to return to execution step 202 every time, matched filtering series can also be increased.
In embodiments of the present invention, due to carrying out matched filtering processing to transmission signal and reference signal, n UE's of acquisition
Signal original position and signal intensity, select the maximum UE of M signal strength parameter, according to M UE signal original position with
Corresponding reference signal generates Interference Cancellation reference signal, using the Interference Cancellation reference signal, offsets multiple access caused by M UE
Interference signal, judge whether flow continues according to preparatory condition, if continuing, continue the transmission signal after counteracting as input
Above-mentioned flow is performed, so as to improve the efficiency and reduction error of offsetting multi-access inference.
Embodiment 3
On the basis of embodiment 1, the embodiments of the invention provide a kind of method for offsetting multi-access inference.
In embodiments of the present invention, receiving terminal can receive the transmission signal of N number of UE transmittings, by N number of UE transmission signal
Reference signal corresponding with N number of UE carries out matched filtering processing, obtains n UE ID, signal original position and signal intensity ginseng
Number, selection signal intensive parameter exceed M UE of intensity threshold, are believed using M UE signal original position and corresponding refer to
Number generation Interference Cancellation reference signal, M UE generation is balanced out from the transmission signal of reception using Interference Cancellation reference signal
Multi-access inference.
Referring to Fig. 3-1, this method includes：
Step 301：Receive N number of UE transmission signal；
Wherein, in cdma system, receiving terminal can correspond to N number of UE, and N is the integer more than 2.N number of UE can be to receiving terminal
Launch transmission signal.For example, positioning indoors in application scenarios, receiving terminal can be the node for needing to position, and receiving terminal is corresponding
UE can be reference mode known to indoor location, N is the quantity of reference mode.For another example, in wireless communications application scene,
Receiving terminal can be base station, and UE corresponding to receiving terminal can be the UE of access base station, and N is the UE of access base station quantity.
It should be noted that：Each UE in N number of UE may be different apart from the distance of receiving terminal, and each UE transmission power
It is identical.In a cdma system, the signal intensity of the transmission signal of the receiving terminal reception UE transmitting near apart from its is stronger, receives distance
The signal intensity of the transmission signal of its remote UE transmitting is weaker.Because strong signal has obvious inhibitory action to weak signal, make
Obtain in the transmission signal of reception, the transmission signal of the UE near apart from receiving terminal transmittings receives the UE remote apart from its to receiving terminal and sent out
The transmission signal penetrated produces multi-access inference.
Further, receiving terminal can be previously stored the ID and reference signal of each UE corresponding to it.Preferably, receive
Each UE ID and reference signal can be stored in UE ID and the corresponding relation of reference signal corresponding to end.
Wherein, UE ID and the corresponding relation of reference signal can be configured to obtain by technical staff in advance.For receiving terminal
Any one corresponding UE, technical staff can gather signal corresponding to the UE in advance, the reference using the signal of collection as the UE
Signal, the ID of the UE and reference signal are stored in the UE of receiving terminal ID and the corresponding relation of reference signal；By above-mentioned side
The ID of each UE in N number of UE and reference signal are stored in the UE ID and the corresponding relation of reference signal of receiving terminal by formula.
For example, in a cdma system, corresponding 7 UE of receiving terminal, respectively UE1, UE2, UE3, UE4, UE5, UE6 and UE7.
Technical staff can gather reference signal S3, UE4 of reference signal S2, UE3 of UE1 reference signal S1, UE2 respectively in advance
The reference signal S6 and UE7 of reference signal S5, UE6 of reference signal S4, UE5 reference signal S7, respectively by seven UE's
ID and reference signal are stored with UE as shown in table 2 ID and the corresponding relation of reference signal.
Table 2
| UE ID | Reference signal |
| ID1 | S1 |
| ID2 | S2 |
| ID3 | S3 |
| ID4 | S4 |
| ID5 | S5 |
| ID6 | S6 |
| ID7 | S7 |
Wherein, 7 UE launch transmission signal to receiving terminal, and correspondingly, receiving terminal receives the transmission signal of 7 UE.
Step 302：Obtain reference signal corresponding to UE；
Specifically, it is corresponding with reference to letter that each UE is obtained in the corresponding relation from the UE stored ID with reference signal
Number.
Step 303：The transmission signal of reception and the reference signal obtained are subjected to matched filtering processing, n UE's of acquisition
ID, signal original position and signal strength parameter；
Specifically, it is corresponding for any one UE obtained in the corresponding relation from the UE stored ID with reference signal
Reference signal, the transmission signal of reception and the reference signal are subjected to matched filtering processing, obtain what is matched with the reference signal
One signal, the signal strength parameter and signal original position of the signal are obtained, by the signal strength parameter and signal of the signal
Original position respectively as the UE signal strength parameter and signal original position, and from the UE stored ID with reference to believing
Number corresponding relation in obtain the ID of the UE, so obtain ID, signal original position and the signal strength parameter of the UE；For it
His each UE in a manner described, finally gets n UE ID, signal original position and signal strength parameter, wherein, n is small
In or equal to N.
Preferably, receiving terminal can use matched filtering group to the transmission signal of reception and the reference signal obtained progress
With filtering process, matched filtering group can include N number of matched filtering unit, Ke Yiwei：
Receiving terminal selects a matched filtering unit from matched filtering group, by reference signal corresponding to any one UE and connects
The transmission signal of receipts is input to the matched filtering unit.The matched filtering unit enters to the transmission signal of reception with the reference signal
Row matched filtering is handled, and obtains the signal strength parameter and signal original position of the UE.
Wherein, the signal original position of signal can be test value or delay points of signal etc..
For example, obtain its corresponding UE1's in corresponding relation of the receiving terminal from UE as shown in table 2 ID with reference signal
ID1 and reference signal S1, the transmission signal of reception and reference signal S1 are subjected to matched filtering processing, obtained and reference signal
The signal 1 of S1 matchings, obtains the signal strength parameter and signal original position 7 of signal 1, and ID1, the signal for so obtaining UE1 are strong
Spend parameter and signal original position 7.For other six UE, receiving terminal all finally gets UE2 ID2, letter in a manner described
Number intensive parameter and signal original position 5, UE3 ID3, signal strength parameter and signal original position 10, UE4 ID4, signal
Intensive parameter and signal original position 5, UE5 ID5, signal strength parameter and signal original position 9 and UE6 ID6, signal
Intensive parameter and signal original position 10.
Step 304：According to signal strength parameter, selection signal intensity exceedes M UE of intensity threshold；
Specifically, this step can include the step of following (1) to (4), be respectively:
（1）：The quantity for exceeding the UE of intensity threshold to signal strength parameter judges, if the quantity is 1, performs
（2）If the quantity is n, perform（3）, otherwise, perform（4）；
（2）：Intensity threshold is reduced, returns and performs（1）；
Specifically, intensity threshold is reduced into default decrement.
（3）：Increase intensity threshold, return and perform（1）；
Specifically, intensity threshold is increased into default incrementss.
Wherein, default decrement can be greater than, equal to or less than default incrementss.
（4）：Selection signal intensive parameter exceedes M UE of intensity threshold.
Wherein, because the UE near apart from the receiving terminal transmission signal launched is adjusted the distance the transmitting letter of the remote UE transmittings of receiving terminal
Number there is obvious inhibitory action, so needing selection signal intensive parameter to exceed M UE of intensity threshold, and pass through subsequent step
305 and 306 offset multi-access inference caused by the UE of selection from the transmission signal of reception.
Further, M UE of selection ID, signal strength parameter and signal original position can also be stored.
Wherein, the multi-access inference being subject to due to the transmission signal of M maximum UE of signal strength parameter is smaller, therefore can be with
M UE of selection ID, signal strength parameter and signal original position is stored, so as to ID of the receiving terminal according to the UE of storage, letter
Number intensive parameter and signal original position carry out concrete application.For example, positioning indoors in application scenarios, receiving terminal can basis
The UE of storage ID and signal strength parameter positions to itself.For another example, in wireless communications application scene, receiving terminal can be with
According to the UE of storage ID and signal original position, the transmission signal that the UE of storage launches is received.
For example, selection signal intensive parameter exceedes the UE1 and UE2 of intensity threshold.
Wherein, if the quantity that signal intensity exceedes the UE of intensity threshold is 1, can also be done by existing counteracting multiple access
Technology is disturbed to be handled, is no longer described in detail herein.
Step 305：Utilize M UE of selection signal original position and the generation Interference Cancellation reference of corresponding parameter signal
Signal；
Specifically, from the UE stored ID and the corresponding relation of reference signal, in the M UE ID for obtaining selection
Reference signal corresponding to each UE ID, that is, obtain reference signal corresponding to M UE；According to each UE signal original position,
Linear superposition is carried out to reference signal corresponding to each UE, obtains Interference Cancellation parameter signal.
Preferably, according to each UE signal original position, linear superposition is carried out to reference signal corresponding to each UE, obtained
To the operation of Interference Cancellation parameter signal, Ke Yiwei：
According to each UE signal original position, obtain each UE corresponding to the signal of signal element that includes of reference signal
Original position；Signal original position identical signal element is added up, obtains accumulated value corresponding to the signal original position,
Wherein, in this step, all signal original position identical signal elements are all added up, obtains all signal start bits
Put corresponding accumulated value；Accumulated value corresponding to all signal original positions is combined into Interference Cancellation reference signal.
Preferably, all signal original position identical signal elements are all added up, obtains all signal start bits
The operation of accumulated value, Ke Yiwei corresponding to putting：
Create an array, each UE to should a line for including of array, the columns of the array is more than or equal to M UE's
The length sum of peak signal original position and reference signal in signal original position subtracts one, is referred to according to corresponding to each UE
The signal original position for the signal element that signal includes, filled respectively in row corresponding to each UE corresponding to each UE with reference to letter
Number signal element included, wherein, the signal element that each row in the array include all is signal original position identical letter
Number element；The signal element included to each row of the array is added up to obtain and added up corresponding to all signal original positions
Value.
Preferably, the peak signal original position that the columns of the array is more than or equal in M UE signal original position
Subtract one with the length sum of reference signal and less than or equal to the length of the transmission signal received.
For example, according to UE1 ID1 and UE2 ID2, respectively from UE as shown in table 2 ID passes corresponding with reference signal
Reference signal S2 corresponding to reference signal S1 and UE2 corresponding to UE1 is obtained in system.5 signal elements that reference signal S1 includes
Respectively S11, S12, S13, S14 and S15,5 signal elements that reference signal S2 includes be respectively S21, S22, S23, S24 and
S25。
The signal original position 7 according to corresponding to the UE1 of selection, obtain the letter for the signal element S11 that reference signal S1 includes
Number original position 7, signal element S12 signal original position 8, signal element S13 signal original position 9, signal element S14
Signal original position 10 and signal element S15 signal original position 11.According to the UE2 of selection signal original position 5, obtain
Take the signal original position 5, signal element S22 signal original position 6, signal for the signal element S21 that reference signal S2 includes
The signal original position of the signal original position 7 of element S 23, signal element S24 signal original position 8 and signal element S25
9。
Create array as shown in figure 3-2, in the array UE1 to should the first row of array, UE2 to should array
Second row, the columns j of the array are more than or equal to the first numerical value 11 and less than or equal to the length 20 of mixed signal, the first numerical value
11 be that the sum 12 of length 5 of maximum position information 7 in the positional information by selection and reference signal subtracts 1 and obtained；Assuming that should
The columns j of array is 11.
Referring to Fig. 3-2, according to the reference signal S1 signal element S11 included signal original position 7, signal element S12
Signal original position 8, signal element S13 signal original position 9, signal element S14 signal original position 10 and signal
The signal original position 11 of element S 15, in the first row corresponding to UE1 fill reference signal S1 include S11, S12, S13,
Five signal elements of S14 and S15.According to the reference signal S2 signal element S21 included signal original position 5, signal element
S22 signal original position 6, signal element S23 signal original position 7, signal element S24 signal original position 8 and letter
The signal original position 9 of number element S 25, filled in the second row corresponding to UE2 S21, S22, S23 that reference signal S2 includes,
Five signal elements of S24 and S25.
In the array shown in Fig. 3-2, the signal element that each row of the array include all is that signal original position is identical
Signal element.Added up to obtain accumulated value difference corresponding to all signal original positions to each signal element included that arranges
For A（1）、A（2）、……、A（11）, accumulated value corresponding to all signal original positions is combined into Interference Cancellation reference signal A
（1）A（2）……A（11）.
Step 306：Using the Interference Cancellation reference signal, multi-access inference caused by M UE is offset from transmission signal；
Specifically, the Interference Cancellation reference signal is subtracted from transmission signal, M UE is offset from transmission signal to realize
Caused multi-access inference.
For example, Interference Cancellation reference signal A is subtracted from transmission signal（1）A（2）……A（12）, believed with realizing from transmitting
Multi-access inference caused by UE1 and UE2 is offset in number.
Step 307：Judge whether flow continues according to preparatory condition, if continuing, the transmission signal that step 306 is exported
As input, return to step 302, otherwise end operation.
Specifically, if n is more than M, judge flow continue, if n is less than or equal to M, judge flow not after
It is continuous.
For example, obtaining 6 UE ID, signal strength parameter and signal original position, i.e. n is 6 and more than 3, i.e. n is more than M,
Judge that flow continues, using the transmission signal after counteracting as input.It is corresponding with reference signal from UE as shown in table 2 ID
UE3 ID3 and reference signal S3 is obtained in relation, transmission signal and reference signal S3 carry out matched filtering processing, obtain with
The signal 3 of reference signal S3 matchings.The signal strength parameter and signal original position for obtaining signal 3 are 3, so obtain UE3's
ID3, signal strength parameter and signal original position 3.For other UE4, UE5, UE6 and UE7 all in a manner described, obtain
UE4 ID, signal strength parameter and signal original position 4, UE5 ID5, signal strength parameter and signal original position 8, UE66
ID6, signal strength parameter and signal original position 7, and UE7 ID7, signal strength parameter and signal original position 15.
Selection signal intensive parameter exceedes the UE of intensity threshold, respectively UE3, UE4, UE5 and UE6.According to the UE3 of selection
ID3, UE4 ID4, UE5 ID5 and UE6 ID6, respectively from UE as shown in table 2 ID and the corresponding relation of reference signal
It is middle to obtain reference signal S5 and UE6 corresponding to reference signal S4, UE5 corresponding to reference signal S3, UE4 corresponding to the UE3 of selection
Corresponding reference signal S6.
5 signal elements that reference signal S3 includes are respectively S31, S32, S33, S34 and S35, and reference signal S4 includes
5 signal elements be respectively S41, S42, S43, S44 and S45,5 signal elements that reference signal S5 includes be respectively S51,
S52, S53, S54 and S55,5 signal elements that reference signal S6 includes are respectively S61, S62, S63, S64 and S65.
According to UE3 signal original position 10, the signal original position for the signal element S31 that acquisition reference signal S3 includes
10th, signal element S32 signal original position 11, signal element S33 signal original position 12, signal element S34 signal
The signal original position 14 of original position 13 and signal element S35.According to UE4 signal original position 4, reference signal S4 is obtained
Including signal element S41 signal original position 4, signal element S42 signal original position 5, signal element S43 signal
The signal original position 8 of original position 6, signal element S44 signal original position 7 and signal element S45.According to UE5 letter
Number original position 8, obtain the signal element S21 that reference signal S5 includes signal original position 8, signal element S22 signal
Original position 9, signal element S23 signal original position 10, signal element S24 signal original position 11 and signal element
S25 signal original position 12.According to UE6 signal original position 7, obtain the signal element S61's that reference signal S6 includes
Signal original position 7, signal element S62 signal original position 8, signal element S63 signal original position 9, signal element
S64 signal original position 10 and signal element S65 signal original position 11.
Create array as shown in Fig. 3-3, in the array, UE3 to should the first row of array, UE4 to should array
The second row, UE5 to should array the third line and UE6 to should array fourth line, the columns of the array is 14.
Referring to Fig. 3-3, according to the reference signal S3 signal element S31 included signal original position 10, signal element S32
Signal original position 11, signal element S33 signal original position 12, signal element S34 signal original position 13 and letter
The signal original position 14 of number element S 35, UE marks ID3 is filled in the first row corresponding to UE3 corresponding to reference signal include
Five signal elements of S31, S32, S33, S34 and S35.Originated according to the reference signal S4 signal element S41 included signal
Position 4, signal element S42 signal original position 5, signal element S43 signal original position 6, signal element S44 signal
The signal original position 8 of original position 7 and signal element S45, filled in the second row corresponding to UE4 corresponding to UE marks ID4
Five signal elements of S41, S42, S43, S44 and S45 that reference signal includes.The signal element included according to reference signal S5
S21 signal original position 8, signal element S22 signal original position 9, signal element S23 signal original position 10, letter
Number the signal original position 11 of element S 24 and signal element S25 second place signal 12, are filled out in the third line corresponding to UE5
Fill five signal elements of S21, S22, S23, S24 and S25 that reference signal S5 includes.The signal element included according to reference signal S6
Plain S61 signal original position 7, signal element S62 signal original position 8, signal element S63 signal original position 9, letter
Number the signal original position 10 of element S 64 and signal element S65 signal original position 11, are filled out in fourth line corresponding to UE6
Fill five signal elements of S61, S62, S63, S64 and S65 that reference signal S6 includes.
In the array shown in Fig. 3-3, the signal element that each row of the array include all is that signal original position is identical
Signal element.Added up to obtain accumulated value difference corresponding to all signal original positions to each signal element included that arranges
For A（1）、A（2）、……、A（14）, accumulated value corresponding to all signal original positions is combined into Interference Cancellation reference signal A
（1）A（2）……A（14）.Interference Cancellation reference signal A is subtracted from transmission signal（1）A（2）……A（12）, to believe from transmitting
Multi-access inference caused by UE4, UE5 and UE6 is offset in number.Wherein, the transmission signal after corresponding counteracting and reference signal progress
With filtering process, UE7 ID, signal strength parameter and signal original position is obtained, M UE of selection is equal to n UE, because
This end operation.
In embodiments of the present invention, due to carrying out matched filtering processing to transmission signal and reference signal, n UE's of acquisition
Signal original position and signal intensity, selection signal intensive parameter exceed M UE of intensity threshold, are risen according to M UE signal
Beginning position and corresponding reference signal generation Interference Cancellation reference signal, utilize the Interference Cancellation reference signal, offset M UE and produce
Raw multiple access interference signal, judge whether flow continues according to preparatory condition, if continue, using the transmission signal after counteracting as
Input continues executing with above-mentioned flow, so as to improve the efficiency and reduction error of offsetting multi-access inference.
Embodiment 4
The embodiments of the invention provide a kind of device for offsetting multi-access inference, referring to Fig. 4, the device includes：
Receiving module 401, for receiving the transmission signal of N number of user equipment
Acquisition module 402, for obtaining reference signal corresponding to user equipment；
The acquisition module 402, for the transmission signal and the reference signal to be carried out into matched filtering processing, obtain
Mark ID, signal original position and the signal strength parameter of n user equipment, wherein n are less than or equal to N；
Selecting module 403, for according to the signal strength parameter, selecting M user to set from the n user equipment
It is standby；
Cancellation module 404, for the signal original position using the M user equipment and the generation of corresponding reference signal
Interference Cancellation reference signal, the M user is balanced out from the transmission signal using the Interference Cancellation reference signal and is set
Standby caused multi-access inference；
Judge module 405, according to preparatory condition judge whether flow continues, if continuing, the transmitting that the 5th step is exported
Signal returns as input and performs the acquisition module, otherwise end operation.
Preferably, the selecting module 403 includes：
First choice unit, the M user maximum for the selection signal intensive parameter from the n user equipment set
It is standby；Or
Second selecting unit, M user equipment of intensity threshold is exceeded for selection signal intensive parameter.
Preferably, second selecting unit includes：
First choice subelement, if the quantity for exceeding the user equipment of intensity threshold for signal strength parameter is 1,
Reduce the intensity threshold, selection signal intensive parameter exceedes M user equipment of the intensity threshold of the reduction；
Second selection subelement, if the quantity for exceeding the user equipment of intensity threshold for signal strength parameter is n,
Increase the intensity threshold, selection signal intensive parameter exceedes M user equipment of the increased intensity threshold.
Preferably, the cancellation module 404 includes：
Summing elements, for the signal original position of each user equipment in the M user equipment, to described
Reference signal corresponding to each user equipment carries out linear superposition, obtains Interference Cancellation reference signal；
Offset unit, for balancing out the M use from the transmission signal using the Interference Cancellation reference signal
Multi-access inference caused by the equipment of family.
Preferably, the summing elements include：
Subelement is obtained, for the signal original position according to each user equipment, each user is obtained and sets
The signal original position for the signal element that standby corresponding reference signal includes；
Cumulative subelement, for signal original position identical signal element to be added up, obtain the signal starting
The accumulated value of position correspondence；
Subelement is combined, for combining to obtain Interference Cancellation with reference to letter by accumulated value corresponding to all signal original positions
Number.
Preferably, the judge module, for judging unit, if being more than M for n, judge to continue flow, otherwise
Judge not continue flow.
In embodiments of the present invention, due to carrying out matched filtering processing to transmission signal and reference signal, n user is obtained
The signal original position and signal intensity of equipment, M user equipment is selected according to signal strength parameter, according to M user equipment
Signal original position and corresponding reference signal generation Interference Cancellation reference signal, using the Interference Cancellation reference signal, support
Disappear multiple access interference signal caused by M user equipment, judges whether flow continues according to preparatory condition, if continuing, will offset
Transmission signal afterwards continues executing with above-mentioned flow as input, is missed so as to improve to offset the efficiency of multi-access inference and reduce
Difference.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, by program the hardware of correlation can also be instructed to complete, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
- A kind of 1. method for offsetting multi-access inference, it is characterised in that methods described includes：Firstth, the transmission signal of N number of user equipment is received；Secondth, reference signal corresponding to user equipment is obtained；3rd, the transmission signal and the reference signal are subjected to matched filtering processing, obtain the mark of n user equipment ID, signal original position and signal strength parameter, wherein n are less than or equal to N；4th, according to the signal strength parameter, M user equipment is selected from the n user equipment；5th, using the signal original position of the M user equipment and corresponding reference signal generation Interference Cancellation with reference to letter Number, using the Interference Cancellation reference signal M user equipment is balanced out from the transmission signal caused by multiple access do Disturb；If the 6th, n is more than M, using the transmission signal of the 5th step output as input, returns and perform second step, if n is less than Or equal to M, end operation.
- 2. the method as described in claim 1, it is characterised in that it is described according to the signal strength parameter, from the n user M user equipment is selected in equipment, including：The M maximum user equipment of selection signal intensive parameter from the n user equipment；OrSelection signal intensive parameter exceedes M user equipment of intensity threshold.
- 3. method as claimed in claim 2, it is characterised in that the selection signal intensive parameter exceedes M of intensity threshold User equipment, including：If the quantity that signal strength parameter exceedes the user equipment of intensity threshold is 1, reduce the intensity threshold, selection letter Number intensive parameter exceedes M user equipment of the intensity threshold of the reduction；If the quantity that signal strength parameter exceedes the user equipment of intensity threshold is n, increase the intensity threshold, selection letter Number intensive parameter exceedes M user equipment of the increased intensity threshold.
- 4. the method as described in any one of claims 1 to 3 claim, it is characterised in that described to be set using the M user Standby signal original position and corresponding reference signal generation Interference Cancellation reference signal, including：The signal original position of each user equipment in the M user equipment, it is corresponding to each user equipment Reference signal carry out linear superposition, obtain Interference Cancellation reference signal.
- 5. method as claimed in claim 4, it is characterised in that each user in the M user equipment sets Standby signal original position, linear superposition is carried out to reference signal corresponding to each user equipment, obtains Interference Cancellation ginseng Signal is examined, including：According to the signal original position of each user equipment, obtaining each reference signal corresponding to user equipment includes Signal element signal original position；Signal original position identical signal element is added up, obtains accumulated value corresponding to the signal original position；Accumulated value corresponding to all signal original positions is combined to obtain Interference Cancellation reference signal.
- 6. a kind of device for offsetting multi-access inference, it is characterised in that described device includes：Receiving module, for receiving the transmission signal of N number of user equipment；Acquisition module, for obtaining reference signal corresponding to user equipment；The acquisition module, for the transmission signal and the reference signal to be carried out into matched filtering processing, obtain n user Mark ID, signal original position and the signal strength parameter of equipment, wherein n are less than or equal to N；Selecting module, for according to the signal strength parameter, M user equipment to be selected from the n user equipment；Cancellation module, supported for the signal original position using the M user equipment and the generation interference of corresponding reference signal Disappear reference signal, and the M user equipment is balanced out from the transmission signal using the Interference Cancellation reference signal produces Multi-access inference；Judge module, if being more than M for n, using the transmission signal of the 5th step output as input, return and perform the acquisition Module, if n is less than or equal to M, end operation.
- 7. device as claimed in claim 6, it is characterised in that the selecting module includes：First choice unit, the M user equipment maximum for the selection signal intensive parameter from the n user equipment；Or Person,Second selecting unit, M user equipment of intensity threshold is exceeded for selection signal intensive parameter.
- 8. device as claimed in claim 7, it is characterised in that second selecting unit includes：First choice subelement, if the quantity for exceeding the user equipment of intensity threshold for signal strength parameter is 1, reduce The intensity threshold, selection signal intensive parameter exceed M user equipment of the intensity threshold of the reduction；Second selection subelement, if the quantity for exceeding the user equipment of intensity threshold for signal strength parameter is n, increases The intensity threshold, selection signal intensive parameter exceed M user equipment of the increased intensity threshold.
- 9. the device as described in any one of claim 6 to 8 claim, it is characterised in that the cancellation module includes：Summing elements, for the signal original position of each user equipment in the M user equipment, to described each Reference signal corresponding to user equipment carries out linear superposition, obtains Interference Cancellation reference signal；Offset unit, set for balancing out the M user from the transmission signal using the Interference Cancellation reference signal Standby caused multi-access inference.
- 10. device as claimed in claim 9, it is characterised in that the summing elements include：Subelement is obtained, for the signal original position according to each user equipment, obtains each user equipment pair The signal original position for the signal element that the reference signal answered includes；Cumulative subelement, for signal original position identical signal element to be added up, obtains the signal original position Corresponding accumulated value；Subelement is combined, for combining to obtain Interference Cancellation reference signal accumulated value corresponding to all signal original positions.
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| CN101938294A (en) * | 2009-06-30 | 2011-01-05 | 联芯科技有限公司 | Same-frequency multi-cell channel estimation method, device and system |
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