CN101807943B - Single-user receiving device capable of eliminating multipath interference - Google Patents
Single-user receiving device capable of eliminating multipath interference Download PDFInfo
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- CN101807943B CN101807943B CN2010101292526A CN201010129252A CN101807943B CN 101807943 B CN101807943 B CN 101807943B CN 2010101292526 A CN2010101292526 A CN 2010101292526A CN 201010129252 A CN201010129252 A CN 201010129252A CN 101807943 B CN101807943 B CN 101807943B
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- multiplier
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Abstract
The invention relates to a single-user receiving device capable of eliminating multipath interference which is formed by mounting uplink centrally and dispreading codes in local and is mainly used for TD-SCDMA multipath interference elimination and multiuser joint detection. The single-user receiving device comprises a second multiplier (M2) used for dispreading signals expected to receive, a first adder (M1) used for eliminating interference, a third adder (M3) used for superposing multipath interference signals, a fourth adder (M4) used for superposing interference signals in two time sections of one-way multipath interference, a fifth multiplier (M5) used for constructing multipath interference signals, a sixth multiplier (M6), a seventh multiplier (M7) and a eighth multiplier (M8). N-numbered single-user receiving devices capable of eliminating multipath interference are used to easily form a single-user N-path Rake receiver capable of eliminating multipath interference. M-numbered single-user receiving devices capable of eliminating multipath interference are used to easily form a TD-SCDMA multi-user joint receiver for M users. The multi-user joint receiving device formed by orthogonal centrally-mounted sequence and local decoding and spreading is basically characterized by simple algorithm and easy realization method.
Description
Technical field
The present invention relates to a kind of up midamble sequence and single-user receiving device capable that the local elimination multipath of separating the extended code realization disturbs of utilizing, can be used for the joint receiver of TD-SCDMA standard, belong to the mobile communication technology field.
Background technology
Using the cdma base station transceiver equipment of joint receiver is the high-tech product of moving communicating field.The single-user receiving device capable that utilizes TD-SCDMA standard quadrature midamble sequence and the local elimination multipath of separating the extended code realization to disturb can be used for the joint receiver of TD-SCDMA standard.This high technology equipment is used for cdma system, can reduce the influence of multi-user interference, improves the resource utilization of the frequency spectrum and the power of posting a letter.Patent application of the present invention provides the single-user receiving device capable that utilizes midamble sequence and the local elimination multipath of separating the extended code formation to disturb in the TD-SCDMA standard.This device also can expand to can eliminate single user 3 footpath Rake receiver and multi-user association receivers that multipath disturbs.There are a lot of data to provide the algorithm that multi-user association detects; But these algorithms are compared with the single-user receiving device capable that the local elimination multipath of separating the extended code formation disturbs with the quadrature midamble sequence that utilizes that the present invention provides; The present invention has the basic characteristics that equipment is simple, be easy to realize; Equipment dependability rising, expense will be descended, make promoting the use of of multi-user association receiver become possibility.
Summary of the invention
Technical problem: the technical problem that the present invention will solve is: to abovely also not having correlation technique data explanation, utilizing TD-SCDMA standard quadrature midamble sequence and local to separate the multi-user association receiver that extended code constitutes; The single-user receiving device capable that a kind of our elimination multipath initiative, that utilize TD-SCDMA standard quadrature midamble sequence and this locality to separate the extended code formation disturbs is proposed; The multi-user association that this device also can be used for the TD-SCDMA standard detects; Can reduce the influence of multi-user interference significantly, improve the resource utilization of the frequency spectrum and the power of posting a letter.
Technical scheme: a kind of elimination in the single-user receiving device capable that multipath disturbs of the present invention; The input of collecting mail and number to connect first adder in 3 footpaths of containing K user; This user's first footpath signal despreading of the output termination of first adder is with the input of second multiplier; This locality is separated extended code and is delivered to the another one input of second multiplier and the input of delay circuit respectively; The input of delay circuit output termination the 5th amplitude multiplier and the 7th amplitude multiplier, the output of said the 5th amplitude multiplier and the 7th amplitude multiplier inserts the input of sextupole property multiplier and ends of the earth property multiplier respectively; The output of said sextupole property multiplier and ends of the earth property multiplier is received respectively and is used for two inputs that one road multipath disturbs the adder of two period interference signal stacks; The output termination multichannel multipath of said adder disturbs the input of stack adder; The another one input of the said first adder of output termination of said the 3rd adder; The despread signal of collecting mail number in this user first footpath of the output of said second multiplier output constitutes and eliminates single user's single drive signal receiving system that multipath disturbs.
Single user's single drive signal receiving system that said elimination multipath disturbs can expand to eliminates single user 3 footpath Rake receivers that multipath disturbs.
Said single user 3 footpath Rake receivers can expand to the multi-user association receiver.
Beneficial effect: carry out interference eliminated and multi-user association reception because the present invention utilizes TD-SCDMA standard quadrature midamble sequence and this locality to separate extended code; Compare the realization difficulty that greatly reduces the multi-user association receiver with the ZF-BLE algorithm that existing patent of invention provides; Saved a large amount of mathematical operation processes; Make the reliability of equipment rise, expense descends.
Description of drawings
Fig. 1 is used to eliminate the theory diagram of a certain footpath of the single user signal receiver that multipath disturbs for the present invention.
Fig. 2 has provided the realization circuit of the multiplier of using among the present invention.
Fig. 3 has provided the realization circuit of the adder of using among the present invention.
Embodiment
Fig. 1 comprises multi-user, the multipath collection of letters S of base station receiver coherent demodulator output
Rd, the said collection of letters number meets first adder M
1Input, first adder M
1This user of output termination first footpath signal despreading with the second multiplier M
2Input, extended code WL is separated in this locality
11Deliver to the second multiplier M respectively
2Another one input and delay circuit t
dInput, delay circuit t
dOutput termination the 5th amplitude multiplier M
5With the 7th amplitude multiplier M
7Input, said the 5th amplitude multiplier M
5With the 7th amplitude multiplier M
7Output insert sextupole property multiplier M respectively
6With ends of the earth property multiplier M
8Input; Said sextupole property multiplier M
6With ends of the earth property multiplier M
8Two outputs receive respectively and be used for the adder M that one road multipath disturbs two period interference signals stacks
4Two inputs; Said adder M
4Output termination multichannel multipath disturb stack adder M
3Input; Said adder M
3Output termination multipath interference eliminated adder M
2Input, this user first footpath signal despreading is with the second multiplier M
2The despread signal u that collects mail number of this user first footpath of output output
11
Utilize midamble sequence and this locality to separate extended code and carry out interference eliminated and multi-user association when detecting, establish S
Rd: single user collects mail in two footpaths number; T
S: the user symbol duration; t
d: multipath disturbs the time delay of MPI; P
I: by u
12The P that the phase difference θ of collection of letters carrier wave and local coherent carrier produces
θAnd u
11Data symbol polarity Pu
11Common decision, P
I=P
θP
U11The amplitude of ρ: MPI by cos θ and the common decision of decline, can be measured by mid-(mid), utilizes mid-(mid) can also measure P
θAnd t
dCertificate despread signal can be tried to achieve P
U11Should have:
S
r1＝u
11·W
L11+u
12·W
L11·P
θ＝S
r11+S
r12 (1)
U wherein
11Be the collection of letters in single user first footpath number, u
12Be the collection of letters in single user second footpath number.
I
12＝S
r12＝u
12·W
L11·P
θ (2)
W wherein
L11For separating extended code in this locality.
u
12＝ρ·u
11(t-t
d) (3)
S
r12＝ρ·u
11(t-t
d)·W
L11·P
θ
＝ρ·P
u11(0，t
d)·W
L11(t-t
d)·W
L11·P
θ+ρ·P
u11(t
d，T
S)·W
L11(t-t
d)·W
L11·P
θ
＝S
r121+S
r122 (4)
I
12＝S
r12＝ρ·P
u11·W
L11(t-t
d)·W
L11·P
θ (5)
This enforcement utilizes up midamble sequence and the local theory diagram of separating the single-user receiving device capable of extended code formation elimination multipath interference, can be used for realizing that multi-user association detects, and eliminates multipath interference purpose to reach.
Present embodiment is used to eliminate single user one footpath signal receiving device theory diagram that multipath disturbs and sees Fig. 1.
Embodiment one
Present embodiment utilizes up midamble sequence and the local extended code of separating to constitute the single-user receiving device capable theory diagram of eliminating the multipath interference, can expand to eliminate single user 3 footpath Rake receivers that multipath disturbs, and also can expand to the multi-user association receiver.
The collection of letters S of base station receiver coherent demodulator output
RdMeet first adder M
1Input, first adder M
1This user of output termination first footpath signal despreading with the second multiplier M
2Input, extended code W is separated in this locality
L11Deliver to the second multiplier M respectively
2Another one input and delay circuit t
dInput, delay circuit t
dOutput termination the 5th amplitude multiplier M
5With the 7th amplitude multiplier M
7Input, said the 5th amplitude multiplier M
5With the 7th amplitude multiplier M
7Output insert sextupole property multiplier M respectively
6With ends of the earth property multiplier M
8Input; Said sextupole property multiplier M
6With ends of the earth property multiplier M
8Two outputs receive respectively and be used for the adder M that one road multipath disturbs two period interference signals stacks
4Two inputs; Said adder M
4Output termination multichannel multipath disturb stack adder M
3Input; Said adder M
3Output termination multipath interference eliminated adder M
2Input, this user first footpath signal despreading is with the second multiplier M
2The despread signal u that collects mail number of this user first footpath of output output
11
Single user's single drive signal receiving system that said elimination multipath disturbs can expand to eliminates single user 3 footpath Rake receivers that multipath disturbs.
Said single user 3 footpath Rake receivers can expand to the multi-user association receiver.
Fig. 2 has provided the realization circuit of the multiplier of using in the utility model, is made up of the difference channel and the voltage-controlled current source of two parallel operations, and positive source Vcc connects first resistance R respectively
1, second resistance R
2A contact, said first resistance R
1Another contact receive the first triode T respectively
1, the 3rd triode T
3Collector driving point, said second resistance R
2Another contact receive the second triode T respectively
2, the 4th triode T
4Collector driving point. the said first triode T
1, the second triode T
2Emitter contact receive the 5th triode T respectively
5Collector driving point, said the 3rd triode T
3, the 4th triode T
4Emitter contact receive the 6th triode T respectively
6Collector driving point, said the 5th triode T
5, the 6th triode T
6Emitter contact be connected respectively to current source I
EA contact, the another one contact of said current source is connected to power cathode-Vcc, the said first triode T
1Base contact be connected to said the 4th triode T
4Base contact, the said second triode T
2Base contact be connected to said the 3rd triode T
3Base contact, from the said first triode T
1, the second triode T
2Base stage draw this multiplier first voltage input υ respectively
xPositive and negative terminal, from said the 5th triode T
5, the 6th triode T
6Base stage draw this multiplier second voltage input υ respectively
yPositive and negative terminal, from said the 4th triode T
4, the first triode T
1Collector electrode draw this multiplier output υ respectively
oPositive and negative terminal.
Fig. 3 has provided the realization circuit of the adder of using in the utility model, two-way input signal V
I1, V
I2Connect first resistance R respectively
1, second resistance R
2A contact, said first resistance R
1, second resistance R
2Another contact connect the 3rd resistance R respectively
3With the first integrated transporting discharging U
1A contact, said the 3rd resistance R
3Another contact connect the 5th resistance R
5A contact, the said first integrated transporting discharging U
1In addition two contacts connect the 4th resistance R respectively
4With the 5th resistance R
5A contact, the 4th resistance R of telling
4Another contact ground connection, said the 5th resistance R
5In addition two contacts connect the 7th resistance R respectively
7With the second integrated operatinoal amplifier U
2A contact, said the 7th resistance R
7Another contact meet output V
0, the said second integrated operatinoal amplifier U
2In addition two contacts connect the 6th resistance R respectively
6With output V
0A contact, said the 6th resistance R
6Another contact ground connection.
Except that the foregoing description, the present invention can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of requirement of the present invention.
Claims (3)
1. eliminate the single-user receiving device capable that multipath disturbs for one kind, it is characterized in that in this device, contain K user's the 3 footpath collection of letters number (S
Rd) meet first adder (M
1) input, first adder (M
1) this user of output termination first footpath signal despreading with the second multiplier (M
2) input, extended code (W is separated in this locality
L11) deliver to the second multiplier (M respectively
2) another one input and delay circuit (t
d) input, delay circuit (t
d) output termination the 5th amplitude multiplier (M
5) and the 7th amplitude multiplier (M
7) input, said the 5th amplitude multiplier (M
5) and the 7th amplitude multiplier (M
7) output insert sextupole property multiplier (M respectively
6) and ends of the earth property multiplier (M
8) input; Said sextupole property multiplier (M
6) and ends of the earth property multiplier (M
8) output receive respectively and be used for the adder (M that one road multipath disturbs two period interference signals stacks
4) two inputs; Said adder (M
4) output termination multichannel multipath disturb stack adder (M
3) input; Said multipath disturbs stack adder (M
3) the said first adder (M of output termination
1) the another one input; The said second multiplier (M
2) the despread signal (u that collects mail number of this user first footpath of output output
11), constitute and eliminate single user's single drive signal receiving system that multipath disturbs.
2. the single-user receiving device capable that elimination multipath as claimed in claim 1 disturbs is characterized in that single user's single drive signal receiving system that said elimination multipath disturbs can expand to single user 3 footpath Rake receivers of eliminating the multipath interference.
3. the single-user receiving device capable that elimination multipath as claimed in claim 2 disturbs is characterized in that said single user 3 footpath Rake receivers can expand to the multi-user association receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101292526A CN101807943B (en) | 2010-03-19 | 2010-03-19 | Single-user receiving device capable of eliminating multipath interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101292526A CN101807943B (en) | 2010-03-19 | 2010-03-19 | Single-user receiving device capable of eliminating multipath interference |
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| Publication Number | Publication Date |
|---|---|
| CN101807943A CN101807943A (en) | 2010-08-18 |
| CN101807943B true CN101807943B (en) | 2012-11-28 |
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| CN2010101292526A Expired - Fee Related CN101807943B (en) | 2010-03-19 | 2010-03-19 | Single-user receiving device capable of eliminating multipath interference |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015017986A1 (en) * | 2013-08-06 | 2015-02-12 | Motorola Solutions, Inc. | Very low intermediate frequency (vlif) receiver and method of controlling vlif recewer |
| CN115328251A (en) * | 2022-08-26 | 2022-11-11 | 北京航空航天大学 | High-precision current source device for active magnetic compensation device and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001006664A3 (en) * | 1999-07-19 | 2001-05-17 | Qualcomm Inc | Cdma multiple access interference cancellation using signal estimation |
| CN1407748A (en) * | 2001-08-24 | 2003-04-02 | 华为技术有限公司 | Channel estimate method and apparatus |
| CN2792021Y (en) * | 2005-04-14 | 2006-06-28 | 中国电子科技集团公司第五十四研究所 | Distortion adaptive high-capacity scatter communication modem |
-
2010
- 2010-03-19 CN CN2010101292526A patent/CN101807943B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001006664A3 (en) * | 1999-07-19 | 2001-05-17 | Qualcomm Inc | Cdma multiple access interference cancellation using signal estimation |
| CN1407748A (en) * | 2001-08-24 | 2003-04-02 | 华为技术有限公司 | Channel estimate method and apparatus |
| CN2792021Y (en) * | 2005-04-14 | 2006-06-28 | 中国电子科技集团公司第五十四研究所 | Distortion adaptive high-capacity scatter communication modem |
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| CN101807943A (en) | 2010-08-18 |
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