CN104349354A - LTE signal identification method and apparatus - Google Patents
LTE signal identification method and apparatus Download PDFInfo
- Publication number
- CN104349354A CN104349354A CN201310332204.0A CN201310332204A CN104349354A CN 104349354 A CN104349354 A CN 104349354A CN 201310332204 A CN201310332204 A CN 201310332204A CN 104349354 A CN104349354 A CN 104349354A
- Authority
- CN
- China
- Prior art keywords
- signal
- lte
- lte signal
- module
- local sequence
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides an LTE signal identification method and apparatus. The method comprises the following steps: obtaining LTE signals to be identified; generating local sequences corresponding to the different bandwidths of the LTE signals, and recording corresponding relations between the local sequences and the different bandwidths of the LTE signals; performing correlation operation on the generated local sequences and the LTE signals to be identified; comparing peak values obtained through the correlation operation with a preset threshold, and determining whether the peak values are greater than the threshold; and if so, according to the local sequences generating the peak values and the corresponding relations, identifying the bandwidths of the LTE signals. The method and apparatus provided by the invention accurately realize bandwidth detection identification of the LTE signals of a direct amplifier system, a tower mounted amplifier system and a base station amplifier system, and solve the problem of incapability of peak clipping processing and the like in a digital domain caused by an uncertain signal bandwidth of an LTE base station; and the apparatus is flexible and convenient to realize, high in integration and free from increase of any cost.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of LTE signal recognition method and a kind of LTE signal identification device.
Background technology
LTE project is third generation partner program (3rd Generation Partnership Project, 3Gpp) to universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS) Long Term Evolution (the Long Term Evolution of technology, LTE), the Toronto meeting of 3GPP in 2004 is started from.LTE is not the 4G technology that people generally misread, but a transition between 3G and 4G technology, the global standards of 3.9G, it improves and enhances the aerial access technology of 3G, adopt OFDM (Orthogonal Frequency Division Multiplexing, OFDM) and MIMO(Multiple-Input Multiple-Out-put, multiple-input and multiple-output) as the sole criterion of its wireless network evolution.The peak rate of descending 326Mbit/s and up 86Mbit/s can be provided under 20MHz spectral bandwidth.Improve the performance of Cell Edge User, improve cell capacity and reduce system delay.At present, the single carrier bandwidth that LTE supports has 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz.
LTE operator can according to the environment of surrounding, and the factor of each side such as the demand of business and bandwidth resources decides the LTE carrier bandwidths type that base station adopts.For directly putting, can tower puts or base such as to put at the amplifier apparatus, detect that the bandwidth of received base station LTE signal is the prerequisite that can equipment carry out the data processings such as follow-up signal peak clipping accurately.
Summary of the invention
Based on this, the invention provides a kind of LTE signal recognition method and device, the bandwidth detection identification of LTE signal can be completed accurately.
For achieving the above object, the present invention adopts following technical scheme:
A kind of LTE signal recognition method, comprises the following steps:
Obtain LTE signal to be identified;
Produce the local sequence corresponding with the different bandwidth of LTE signal, and record the corresponding relation of described local sequence and LTE signal different bandwidth;
The local sequence produced and described LTE signal to be identified are carried out related operation;
The peak value obtained by related operation compares with the threshold value preset, and judges whether described peak value is greater than described threshold value;
If so, the bandwidth of LTE signal is then identified according to the local sequence and described corresponding relation that produce this peak value.
A kind of LTE signal identification device, comprising:
LTE signal acquisition module, for obtaining LTE signal to be identified;
Local sequence generation module, for generation of the local sequence corresponding with the different bandwidth of LTE signal, and records the corresponding relation of described local sequence and LTE signal different bandwidth;
Related operation module, for carrying out related operation by the local sequence produced and described LTE signal to be identified;
Judge module, compares with the threshold value preset for the peak value obtained by related operation, judges whether described peak value is greater than described threshold value;
Judgement identification module, for when the judged result of described judge module is for being, identifies the bandwidth of LTE signal according to the local sequence and described corresponding relation that produce this peak value.
As can be seen from above scheme, LTE signal recognition method of the present invention and device, after getting LTE signal and local sequence, the local sequence produced is carried out related operation with LTE signal one by one, judgement is carried out to LTE signal identifies according to comparing of the result of related operation and predetermined threshold value.Method of the present invention and device achieve accurately directly put, tower puts or the bandwidth detection identification of base place system LTE signal, solves due to and that the cause difficult problem that at numeric field cannot carry out the process such as peak clipping uncertain to LTE base station signal bandwidth; In the specific implementation, the actual circuit arrangement required for signal bandwidth identification all can be compatible on existing platform, and do not need other extra circuit, therefore realize flexible, integrated level is high, and not needing increases any cost in the present invention simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of a kind of LTE signal recognition method in the embodiment of the present invention;
Fig. 2 is the structural representation of a kind of LTE signal identification device in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, technical scheme of the present invention is further described.
Shown in Figure 1, a kind of LTE signal recognition method, comprises the following steps:
Step S101, obtains LTE signal to be identified.
As a good embodiment, the process obtaining LTE signal to be identified in this step specifically can comprise as follows:
Step S1011, receives the radiofrequency signal of LTE base station, is down-converted to intermediate-freuqncy signal;
Step S1012, carries out filtering process to the intermediate-freuqncy signal after down-conversion;
Step S1013, carries out amplification process by the intermediate-freuqncy signal after filtering process;
Step S1014, carries out analog-to-digital conversion process by the intermediate-freuqncy signal after amplifying process, obtains digital medium-frequency signal, and digital medium-frequency signal is moved zero-frequency, obtain described LTE signal to be identified.
In addition, as a good embodiment, before described radiofrequency signal is down-converted to intermediate-freuqncy signal by step S1011, step S1010 can also be comprised: input power control is carried out to the radiofrequency signal of received LTE base station, to avoid input power excessive, impact is brought on subsequent processes.
Step S102, produces the local sequence corresponding with the different bandwidth of LTE signal, and records the corresponding relation of described local sequence and LTE signal different bandwidth.
Local sequence is made up of the chip sequence of different length.As a good embodiment, the process of the local sequence of described generation specifically can comprise as follows: be different FFT according to the different bandwidth of LTE signal to the Zadoff-Chu sequence produced and convert (Fast Fourier Transformation, fast Fourier transform), produce the local sequence corresponding with the different bandwidth of LTE signal.
It should be noted that, above-mentioned FFT conversion can adopt prior art, and it will not go into details herein.
Local sequence in the embodiment of the present invention adopts the mode of main synchronizing sequence to be produced by Zadoff-Chu sequence, and Zadoff-Chu sequence generates on frequency domain, uses d
un () represents, distinguish three master sync signals with root sequence number u:
Wherein three different cell ID value correspond respectively to root index(root index), i.e. u=25, the sequence of 29,34.
It should be noted that there is no whose execution sequence first after whom between above-mentioned steps S101 and step S102, step S102 can be entered after step S101, or enter step S101 after step S102, even can the two perform simultaneously.
Step S103, carries out related operation by the local sequence produced and described LTE signal to be identified, then enters step S104.
Because LTE bandwidth has six kinds, therefore in fact this step needs repeatedly to carry out, and the different local sequence namely produced needs to carry out related operation with the LTE signal obtained one by one.Concrete, the method for carrying out related operation is coherent detection mode, namely carries out coherent detection one by one with the LTE signal of different local sequences and unknown bandwidth.
Step S104, the peak value obtained by related operation compares with the threshold value preset, and judges whether described peak value is greater than described threshold value; If then enter step S105; If not (namely peak value is less than or equal to default threshold value), then return step S103, adopt next to organize local sequence and repeat related operation, identify successfully until detect judgement.
It should be noted that, above-mentioned threshold value can make different setting according to the difference of specific environment.
Step S105, if (when namely judging to show that a certain peak value is greater than described threshold value), then identifies the bandwidth of LTE signal according to the local sequence and described corresponding relation that produce this peak value.Because the corresponding relation one by one of local sequence and LTE signal different bandwidth is known, then by occurring that the local sequence of correlation peak can know the bandwidth of LTE signal.
In sum, pass through the above embodiment of the present invention, when directly putting, tower put or base place system receives LTE signal time, adopt the local sequence in the embodiment of the present invention and LTE signal data to carry out the mode of coherent detection, namely can carry out simply, accurately adjudicating identification to the LTE signal of unknown bandwidth.
In addition, corresponding with above-mentioned a kind of LTE signal recognition method, the present invention also provides a kind of LTE signal identification device, as shown in Figure 2, comprising:
LTE signal acquisition module 101, for obtaining LTE signal to be identified;
Local sequence generation module 102, for generation of the local sequence corresponding with the different bandwidth of LTE signal, and records the corresponding relation of described local sequence and LTE signal different bandwidth;
Related operation module 103, for carrying out related operation by the local sequence produced and described LTE signal to be identified;
Judge module 104, compares with the threshold value preset for the peak value obtained by related operation, judges whether described peak value is greater than described threshold value;
Judgement identification module 105, for when the judged result of described judge module is for being, identifies the bandwidth of LTE signal according to the local sequence and described corresponding relation that produce this peak value.
As a good embodiment, specifically can comprise in described LTE signal acquisition module connect successively as lower module: frequency-variable module, filtration module, signal amplification module and analog-to-digital conversion module;
Described frequency-variable module, for receiving the radiofrequency signal of LTE base station, is down-converted to intermediate-freuqncy signal;
Described filtration module is used for carrying out filtering process to described intermediate-freuqncy signal;
Described signal amplification module is used for the intermediate-freuqncy signal after filtering process being carried out amplification process;
Described analog-to-digital conversion module is used for carrying out analog-to-digital conversion process by amplifying the intermediate-freuqncy signal after processing, and obtains digital signal, and this digital medium-frequency signal is moved zero-frequency, obtain described LTE signal to be identified.
In addition, as a good embodiment, the rf gain control module be connected with described frequency-variable module can also be comprised in described LTE signal acquisition module, before described radiofrequency signal being down-converted to intermediate-freuqncy signal at described frequency-variable module, input power control is carried out to the radiofrequency signal of received LTE base station, to avoid input power excessive, impact is brought on subsequent processes.
It should be noted that, described LTE signal acquisition module can by FPGA(Field-Programmable Gate Array, field programmable gate array) or DSP(Digital Signal Processing, Digital Signal Processing) etc. chip and peripheral hardware composition, signal processing all completes in FPGA or DSP inside.
As a good embodiment, FFT conversion module can be specifically comprised in described local sequence generation module, for the different bandwidth according to LTE signal, different FFT conversion is done to the Zadoff-Chu sequence produced, produce the local sequence corresponding with the different bandwidth of LTE signal.
Other technical characteristic of above-mentioned a kind of LTE signal identification device is identical with a kind of LTE signal recognition method of the present invention, and it will not go into details herein.
Can be found out by above scheme, LTE signal recognition method of the present invention and device, after getting LTE signal and local sequence, each local sequence is carried out related operation with LTE signal one by one, judgement is carried out to LTE signal identify according to comparing of the result of related operation and predetermined threshold value.Method of the present invention and device achieve accurately directly put, tower puts or the bandwidth detection identification of base place system LTE signal, solves due to and that the cause difficult problem that at numeric field cannot carry out the process such as peak clipping uncertain to LTE base station signal bandwidth; In the specific implementation, the actual circuit arrangement required for signal bandwidth identification all can be compatible on existing platform, and do not need other extra circuit, therefore realize flexible, integrated level is high, and not needing increases any cost in the present invention simultaneously.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a LTE signal recognition method, is characterized in that, comprises the following steps:
Obtain LTE signal to be identified;
Produce the local sequence corresponding with the different bandwidth of LTE signal, and record the corresponding relation of described local sequence and LTE signal different bandwidth;
The local sequence produced and described LTE signal to be identified are carried out related operation;
The peak value obtained by related operation compares with the threshold value preset, and judges whether described peak value is greater than described threshold value;
If so, the bandwidth of LTE signal is then identified according to the local sequence and described corresponding relation that produce this peak value.
2. LTE signal recognition method according to claim 1, is characterized in that, the process of the LTE signal that described acquisition is to be identified comprises:
Receive the radiofrequency signal of LTE base station, down-converted to intermediate-freuqncy signal;
Filtering process is carried out to described intermediate-freuqncy signal;
Intermediate-freuqncy signal after filtering process is carried out amplification process;
Intermediate-freuqncy signal after amplifying process is carried out analog-to-digital conversion process, obtains digital medium-frequency signal, and digital medium-frequency signal is moved zero-frequency, obtain described LTE signal to be identified.
3. LTE signal recognition method according to claim 2, is characterized in that, before described radiofrequency signal is down-converted to intermediate-freuqncy signal, also comprises step: carry out input power control to the radiofrequency signal of received LTE base station.
4. the LTE signal recognition method according to claim 1-3 any one, it is characterized in that, the process of the local sequence of described generation comprises: the different bandwidth according to LTE signal does different FFT conversion to the Zadoff-Chu sequence produced, and produces the local sequence corresponding with the different bandwidth of LTE signal.
5. a LTE signal identification device, is characterized in that, comprising:
LTE signal acquisition module, for obtaining LTE signal to be identified;
Local sequence generation module, for generation of the local sequence corresponding with the different bandwidth of LTE signal, and records the corresponding relation of described local sequence and LTE signal different bandwidth;
Related operation module, for carrying out related operation by the local sequence produced and described LTE signal to be identified;
Judge module, compares with the threshold value preset for the peak value obtained by related operation, judges whether described peak value is greater than described threshold value;
Judgement identification module, for when the judged result of described judge module is for being, identifies the bandwidth of LTE signal according to the local sequence and described corresponding relation that produce this peak value.
6. LTE signal identification device according to claim 5, is characterized in that, described LTE signal acquisition module comprises the frequency-variable module, filtration module, signal amplification module and the analog-to-digital conversion module that connect successively;
Described frequency-variable module, for receiving the radiofrequency signal of LTE base station, is down-converted to intermediate-freuqncy signal;
Described filtration module is used for carrying out filtering process to described intermediate-freuqncy signal;
Described signal amplification module is used for the intermediate-freuqncy signal after filtering process being carried out amplification process;
Described analog-to-digital conversion module is used for carrying out analog-to-digital conversion process by amplifying the intermediate-freuqncy signal after processing, and obtains digital medium-frequency signal, and digital medium-frequency signal is moved zero-frequency, obtain described LTE signal to be identified.
7. LTE signal identification device according to claim 6, it is characterized in that, described LTE signal acquisition module also comprises the rf gain control module be connected with described frequency-variable module, before described radiofrequency signal being down-converted to intermediate-freuqncy signal at described frequency-variable module, input power control is carried out to the radiofrequency signal of received LTE base station.
8. the LTE signal identification device according to claim 5-7 any one, it is characterized in that, described local sequence generation module comprises FFT conversion module, for the different bandwidth according to LTE signal, different FFT conversion is done to the Zadoff-Chu sequence produced, produce the local sequence corresponding with the different bandwidth of LTE signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310332204.0A CN104349354A (en) | 2013-08-01 | 2013-08-01 | LTE signal identification method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310332204.0A CN104349354A (en) | 2013-08-01 | 2013-08-01 | LTE signal identification method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104349354A true CN104349354A (en) | 2015-02-11 |
Family
ID=52503963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310332204.0A Pending CN104349354A (en) | 2013-08-01 | 2013-08-01 | LTE signal identification method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104349354A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111131109A (en) * | 2019-12-31 | 2020-05-08 | 京信通信系统（中国）有限公司 | Signal identification method and device, computer equipment and storage medium |
| CN115208733A (en) * | 2022-07-20 | 2022-10-18 | 成都华日通讯技术股份有限公司 | LTE and 5GNR signal joint identification method |
-
2013
- 2013-08-01 CN CN201310332204.0A patent/CN104349354A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111131109A (en) * | 2019-12-31 | 2020-05-08 | 京信通信系统（中国）有限公司 | Signal identification method and device, computer equipment and storage medium |
| CN115208733A (en) * | 2022-07-20 | 2022-10-18 | 成都华日通讯技术股份有限公司 | LTE and 5GNR signal joint identification method |
| CN115208733B (en) * | 2022-07-20 | 2024-02-13 | 成都华日通讯技术股份有限公司 | LTE and 5GNR signal joint identification method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102113249B (en) | Methods and apparatus for sensing presence of transmission signal in wireless channel | |
| CN102651884B (en) | Frequency-point detection method, device and user equipment | |
| CN100361409C (en) | Method and system for detecting in-band jammers in a spread spectrum wireless base station | |
| CN110191071B (en) | Channel estimation-based measurement method and device in narrow-band Internet of things system | |
| CN102316551B (en) | Method and mobile terminal for achieving rapid frequency scanning | |
| CN101536328A (en) | Systems and methods for detecting the presence of a transmission signal in a wireless channel | |
| CN102291762A (en) | Methods for mdt log reporting and extracting | |
| CN103650599A (en) | Probability calculation of rat candidate | |
| EP2432181A1 (en) | Apparatus and method for communication | |
| US10924243B2 (en) | Channel identification in a MIMO telecommunications system | |
| CN106941384B (en) | Frequency sweeping method and frequency sweep instrument for Internet of things | |
| EP2051395A1 (en) | Communication device and method | |
| CN106301631A (en) | A kind of coprime lack sampling frequency spectrum sensing method based on Subspace Decomposition and device thereof | |
| CN203423805U (en) | Lte signal identification device | |
| Kennedy et al. | RF fingerprint detection in a wireless multipath channel | |
| CN102421163A (en) | Method and device for sequencing frequency points of LTE (Long Term Evolution) system | |
| CN104349354A (en) | LTE signal identification method and apparatus | |
| US8938016B1 (en) | Fast identification of OFDM signal | |
| CN113132898A (en) | 5G NR uplink energy measuring method | |
| CN105764153A (en) | Signature sequence detection method and apparatus of uplink random access | |
| CN115988553A (en) | Signal monitoring method and device and monitoring equipment | |
| WO2011147160A1 (en) | Terminal and method for searching cell frequency | |
| CN111368169B (en) | Method, device, equipment and storage medium for detecting brushing amount behavior | |
| CN103947148B (en) | Discrete transmission detecting device and method | |
| EP2725828B1 (en) | Method for automatic search and addition of neighbor cells by terminal in long term evolution system, and such terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |