CN101640549A - Method for detecting activation of terminal code channel of TD-SCDMA system - Google Patents
Method for detecting activation of terminal code channel of TD-SCDMA system Download PDFInfo
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Abstract
The invention discloses a method for detecting the activation of a terminal code channel of a TD-SCDMA system. The method comprises the following steps: calculating a code channel estimating value ofa cell through a local training sequence code and part of signals of the received training sequence code, and cutting out the number of receiving data of arbitrary symbols; calculating a V block of the cell through the code channel estimating value and all possible code channels and interference code channels of the cell, and constructing a corresponding matrix according to arbitrary symbols and the V block ; matching and filtering the arbitrary symbols by the matrix, and accumulating energy for the arbitrary symbols corresponding to each code channel; and determining whether the code channelsare activated or not by a decision rule of the detection method according to the amount of energy of each code channel. The detection method greatly enhances the accuracy of code channel activation decision, improves the detection efficiency of the system, reduces the loss of system hardware and system software, greatly meets the requirements of users, and is a great progress of the prior art.
Description
Technical field
The present invention relates to the code channel activating detection method of wireless communication field, relate in particular to a kind of detection method of TD-SCDMA system terminal code channel activating.
Background technology
TD-SCDMA (Time Division Synchronous Code Division MultipleAccess: TD-SCDMA system) in the system, terminal is in order to improve receptivity, adopt single sub-district or many sub-districts multi-user association detection technique, except the signal that detects this user, also the signal of the interference user of this area interference user's signal or this sub-district and adjacent sub-district also is used as useful signal and unifies to detect, the input of joint-detection is this user and the channel estimating and the spreading code information of interference user.
By system can know this sub-district ID number, participate in adjacent sub-district ID number of joint-detection, can determine each sub-district Midamble sign indicating number (Midamble sign indicating number: ID training sequence code) number from sub-district ID number, by local Midamble sign indicating number and reception Midamble sign indicating number part signal slip correlation technique, perhaps Steiner channel estimation methods can obtain the channel estimating of this user and each interference user.
Can learn this user's code channel distribution condition by broadcast message, but the code channel distribution condition of the interference user of the interference user of this sub-district and adjacent sub-district can't be obtained directly from broadcast message; In addition, the code channel that this user distributed also not necessarily exhausts, and is in part DTX state such as this user, and these distribution and untapped code channel do not participate in joint-detection; And increase because the complexity of joint-detection is a code channel number with each user who participates in joint-detection, the code channel number of participation joint-detection is too much, the loss that can strengthen system hardware and software.This shows that prior art awaits to further develop.
Summary of the invention
The present invention is directed to existing the problems referred to above in the prior art a kind of detection method of TD-SCDMA system terminal code channel activating is provided,, improve system's detection efficiency, reduce the loss of system hardware and software to strengthen the accuracy of code channel activating judgement.
In order to solve the problems of the technologies described above, the solution of the present invention comprises:
A kind of detection method of TD-SCDMA system terminal code channel activating, wherein, described detection method may further comprise the steps:
A, by the code channel estimated value of local training sequence code with the part signal calculation plot of the training sequence code that receives, and the intercepting reception data number of a symbol arbitrarily;
B, calculate the V piece of described sub-district by the interference code channel of described code channel estimated value, all possible described code channel and described sub-district, and according to described any symbol and the corresponding matrix of described V block structure;
C, carry out matched filtering, and described any symbol of each code channel correspondence carried out energy accumulation with described matrix and described any symbol;
D, judge according to the size of each described code channel energy whether described code channel activates.Described detection method, wherein, described step D also comprises:
D1, according to this user article one code channel configured threshold coefficient, set the threshold value of described code channel activating, and dispose the proportionality coefficient of major-minor code channel;
The energy of D2, described code channel then activates described code channel during greater than described threshold value.
Described detection method, wherein, described step D2 also comprises: when described auxiliary code road was activation, then described primary key road was defaulted as activation.
Described detection method, wherein, described step D2 also comprises: when the energy in described primary key road and described auxiliary code road all greater than described threshold value, and the energy ratio that accounts in described auxiliary code road is during less than described proportionality coefficient, described auxiliary code road is defaulted as un-activation.
Described detection method, wherein, described step D2 also comprises: if former and later two described code channels of this user are when activating, then the code channel between two described code channels is defaulted as activation.
Described detection method, wherein, described step D2 also comprises: when all activated code channel number in this sub-district and adjacent sub-district during greater than default number, choose a number of responses code channel participation joint-detection of energy maximum from the activated code channel of adjacent sub-district.
Described detection method, wherein, described steps A also comprises: the number of a symbol arbitrarily that is intercepted is one to 22.
Described detection method, wherein, described step B also comprises: described V piece is the convolution of compound spreading code and respective channel estimated value.
Described detection method, wherein, described compound spreading code is the product of channel code and scrambler.
Adopt the detection method of a kind of TD-SCDMA system terminal code channel activating provided by the invention, compared with prior art, the code channel activating detection is realized based on exhaustive method, all possible code channel (each sub-district has 16) and the signal that receives are carried out matched filtering, energy according to the matched filtering result of each code channel carries out the code channel activating judgement based on certain criterion then, thereby strengthened the accuracy of code channel activating judgement, improved system's detection efficiency, reduce the loss of system hardware and software, satisfied user's demand greatly.
Description of drawings
The schematic flow sheet that Fig. 1 detects for code channel activating of the present invention;
Fig. 2 is the structural representation of A matrix among the present invention;
Fig. 3 is the schematic flow sheet of code channel activating judgement of the present invention.
Embodiment
Below with reference to accompanying drawing, will carry out comparatively detailed explanation to each preferred embodiment of the present invention.
The invention provides a kind of detection method of TD-SCDMA system terminal code channel activating, the code channel activating detection is realized based on exhaustive method, energy according to the matched filtering result of each code channel carries out the code channel activating judgement based on certain criterion then, thereby strengthened the accuracy of code channel activating judgement, reduce the loss of system hardware and software, satisfied user's demand greatly.
As shown in Figure 1, with this sub-district and two adjacent sub-districts is that example describes, PS (the Packet Service: packet switching service) business of 64kbps in this sub-district (bits per second: bps), distributing code channel is the 1st～8 code channel, and each 5 speed in adjacent sub-district is the voice user of 12.2kbps (bits persecond, bps), 2 code channels of each user, the code channel order assignment all is to distribute 1～10 code channel, and joint detection hardware can be handled maximum 18 code channels.Method step of the present invention is:
Step 101: with local Midamble sign indicating number and the Midamble sign indicating number part signal that receives, by the slip correlation technique, perhaps Steiner channel estimation methods can be estimated obtain two all users' of sub-district channel estimation value by multi-cell channel, changes step 102 then over to.
Step 102: the reception data of n symbol of intercepting, n=1～22; Intercepting in this example is when 64 chips of preceding 4 symbols of pre-treatment time slot, and 15 chips of the time delay of a channel estimation window, and the data of totally 79 chips are designated as d, and d is 1 * 79 vector, changes step 103 then over to.
Step 103: the V piece that calculates described sub-district by the interference code channel of described code channel estimated value, all possible described code channel and described sub-district;
A, calculate compound spreading code:
Comchancode(i)＝ChanCode(i)*ScrambleCode
Wherein, * represents that corresponding chip multiplies each other; ChanCode (i) is a channel code, i=1～16; ScrambleCode is the scrambler of current area; Comchancode (i) is compound spreading code, is the product of channel code and scrambler.
B, calculating V piece:
V(：，i)＝conv(ComChanCode(i)，Channel(i))
Wherein V (:, i) the i row of expression V piece, i=1～16, V is 31 * 16 matrix; Conv is a convolution algorithm; ComChanCode (i) is the compound spreading code that a calculates; Channel (i) is an i code channel corresponding channel estimation value; Change step 104 then over to.
Step 104:, according to described any symbol and the corresponding A matrix of described V block structure, as shown in Figure 2, the matrix of A described in this example is 79 * 64 matrix, changes step 105 then over to.
Step 105: carry out matched filtering with described A matrix and described preceding 4 symbols,
B＝A.′*d.′
Wherein. ' representing matrix transposition; The matrix B size is 64 * 1; Change step 106 then over to.
Step 106: described preceding 4 symbols of each code channel correspondence are carried out energy accumulation, ask the energy of each code channel;
C, each symbol of each code channel of described B correspondence is asked energy:
Power(i)＝real(B(i))
2+imag(B(i))
2
D, the energy of described preceding 4 symbols of each code channel is added up:
P(1)＝Power(1)+Power(17)+Power(33)+Power(49)
P(2)＝Power(2)+Power(18)+Power(34)+Power(50)
^
P(16)＝Power(16)+Power(32)+Power(48)+Power(64)
The process of repeating step 103～step 106 is obtained the energy of each code channel of each sub-district, and three sub-districts always have 48 energy values, change step 107 then over to.
Step 107: judge according to the energy of each described code channel whether described code channel activates.
After finishing above-mentioned flow process, then system enters code channel activating judgement flow process, as shown in Figure 3.
Step 201: article one code channel according to this user is set the code channel activating detection threshold value, and described threshold value is Th=P (1) * 1/4, and wherein, * is a multiplication sign, and coefficient 1/4 is configurable coefficient, sets according to the systematic function simulation result; Change step 202 then over to.
Step 202: the energy and the described threshold T h of each code channel correspondence are compared,, then give tacit consent to described code channel for activating if greater than described threshold T h; Change rapid 203 or step 204 or step 205 or step 206 then over to.
Step 203: for each user, if described primary key road is judged to un-activation, but described auxiliary code road is judged to activation, then gives tacit consent to described primary key road for activating.
Step 204: for each user, if described primary key road and described auxiliary code road energy are all greater than described threshold T h, but the energy in described auxiliary code road is less than 1/3 of described primary key road energy, then described auxiliary code road is defaulted as un-activation, no matter whether the energy that described auxiliary code arrives is greater than described threshold T h, described primary key road energy weight coefficient 1/3 is configurable coefficient, sets according to the systematic function simulation result.
Step 205: for the code channel of this user distribution, if former and later two described code channel activatings, the code channel that is between these two described code channels also activates, for example this user's code channel 4 and code channel 6 energy are greater than described threshold T h, even code channel 5 energy are less than described threshold T h, described code channel 5 also is defaulted as activation.
Step 206: if according to the activated code channel number of described threshold T h judgement greater than default number, for example 18, then eight activated code channels except this user sub-district must participate in the joint-detection, the energy size of the described code channel that calculates according to step 106, a respective number code channel of choosing adjacent cell energies maximum participates in joint-detection, and for example 18-8=10 is individual in the present embodiment.
In sum, adopt the detection method of a kind of TD-SCDMA system terminal code channel activating provided by the invention, compared with prior art, the code channel activating detection is realized based on exhaustive method, all possible code channel (each sub-district has 16) and the signal that receives are carried out matched filtering, energy according to the matched filtering result of each code channel carries out the code channel activating judgement based on certain criterion then, thereby strengthened the accuracy of code channel activating judgement, improved system's detection efficiency, reduced the loss of system hardware and software, having satisfied user's demand greatly, is the very big progress of prior art.
Should be understood that above-mentioned description at preferred embodiment can not be interpreted as the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (9)
1, a kind of detection method of TD-SCDMA system terminal code channel activating is characterized in that, described detection method may further comprise the steps:
A, by the code channel estimated value of local training sequence code with the part signal calculation plot of the training sequence code that receives, and the intercepting reception data number of a symbol arbitrarily;
B, calculate the V piece of described sub-district by the interference code channel of described code channel estimated value, all possible described code channel and described sub-district, and according to described any symbol and the corresponding matrix of described V block structure;
C, carry out matched filtering, and described any symbol of each code channel correspondence carried out energy accumulation with described matrix and described any symbol;
D, judge according to the size of each described code channel energy whether described code channel activates.
2, detection method according to claim 1 is characterized in that, described step D also comprises:
D1, according to this user article one code channel configured threshold coefficient, set the threshold value of described code channel activating, and dispose the proportionality coefficient of major-minor code channel;
The energy of D2, described code channel then activates described code channel during greater than described threshold value.
3, detection method according to claim 2 is characterized in that, described step D2 also comprises: when described auxiliary code road was activation, then described primary key road was defaulted as activation.
4, detection method according to claim 2, it is characterized in that, described step D2 also comprises: when the energy in described primary key road and described auxiliary code road all greater than described threshold value, and the energy ratio that accounts in described auxiliary code road is during less than described proportionality coefficient, described auxiliary code road is defaulted as un-activation.
5, detection method according to claim 2 is characterized in that, described step D2 also comprises: if former and later two described code channels of this user are when activating, then the code channel between two described code channels is defaulted as activation.
6, detection method according to claim 2, it is characterized in that, described step D2 also comprises: when all activated code channel number in this sub-district and adjacent sub-district during greater than default number, choose a number of responses code channel participation joint-detection of energy maximum from the activated code channel of adjacent sub-district.
7, detection method according to claim 1 is characterized in that, described steps A also comprises: the number of a symbol arbitrarily that is intercepted is one to 22.
8, detection method according to claim 1 is characterized in that, described step B also comprises: described V piece is the convolution of compound spreading code and respective channel estimated value.
9, detection method according to claim 8 is characterized in that, described compound spreading code is the product of channel code and scrambler.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102185631A (en) * | 2011-04-28 | 2011-09-14 | 意法·爱立信半导体（北京）有限公司 | Method and device for activating code channel |
| CN102547813A (en) * | 2011-12-16 | 2012-07-04 | 华为技术有限公司 | Code channel detection method and related device and communication system |
| CN102684739A (en) * | 2012-04-16 | 2012-09-19 | 华为技术有限公司 | Mixed code channel detection method and device |
| CN102752013A (en) * | 2012-06-21 | 2012-10-24 | 华为技术有限公司 | Activation code channel detection method and device |
| WO2013044447A1 (en) * | 2011-09-27 | 2013-04-04 | St-Ericsson Sa | Method and apparatus for code activation, computer program and storage medium thereof |
| CN104702312A (en) * | 2015-03-25 | 2015-06-10 | 天津大学 | WCDMA code channel detection method |
Family Cites Families (2)
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| CN1925351A (en) * | 2005-08-31 | 2007-03-07 | 展讯通信（上海）有限公司 | Signal-to-jamming ratio evaluating method under public intermediate code in TD-SCDMA system |
| CN100589334C (en) * | 2007-03-20 | 2010-02-10 | 中兴通讯股份有限公司 | Co-channel adjacent cell channel estimating method at the time of multi-cell union detection in TD SCDMA system |
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| US9450736B2 (en) | 2011-04-28 | 2016-09-20 | ST-Ericsson Semiconductor (Beijing) Co., Ltd | Code channel activation method and device, computer program and storage medium |
| CN102185631A (en) * | 2011-04-28 | 2011-09-14 | 意法·爱立信半导体（北京）有限公司 | Method and device for activating code channel |
| CN102185631B (en) * | 2011-04-28 | 2014-05-14 | 意法·爱立信半导体（北京）有限公司 | Method and device for activating code channel |
| WO2013044447A1 (en) * | 2011-09-27 | 2013-04-04 | St-Ericsson Sa | Method and apparatus for code activation, computer program and storage medium thereof |
| CN102547813A (en) * | 2011-12-16 | 2012-07-04 | 华为技术有限公司 | Code channel detection method and related device and communication system |
| CN102547813B (en) * | 2011-12-16 | 2014-04-02 | 华为技术有限公司 | Code channel detection method and related device and communication system |
| US8750347B2 (en) | 2011-12-16 | 2014-06-10 | Huawei Technologies Co., Ltd. | Code channel detecting method and related device and communication system |
| CN102684739A (en) * | 2012-04-16 | 2012-09-19 | 华为技术有限公司 | Mixed code channel detection method and device |
| CN102752013A (en) * | 2012-06-21 | 2012-10-24 | 华为技术有限公司 | Activation code channel detection method and device |
| US9214982B2 (en) | 2012-06-21 | 2015-12-15 | Huawei Technologies Co., Ltd. | Activated code channel detection method and device |
| CN102752013B (en) * | 2012-06-21 | 2014-09-03 | 华为技术有限公司 | Activation code channel detection method and device |
| CN104702312A (en) * | 2015-03-25 | 2015-06-10 | 天津大学 | WCDMA code channel detection method |
| CN104702312B (en) * | 2015-03-25 | 2017-04-05 | 天津大学 | A kind of WCDMA code channel detection methods |
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Effective date of registration: 20151218 Address after: Dameisha Yantian District of Shenzhen City, Guangdong province 518085 Building No. 1 Patentee after: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Patentee before: ZTE Corporation |
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Application publication date: 20100203 Assignee: Xi'an Chris Semiconductor Technology Co. Ltd. Assignor: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Contract record no.: 2019440020036 Denomination of invention: Method for detecting activation of terminal code channel of TD-SCDMA system Granted publication date: 20121003 License type: Common License Record date: 20190619 |