CN106357277B - Device is selected to enhance WCDMA infant laser signal detection methods with energy brush based on SDR platforms - Google Patents
Device is selected to enhance WCDMA infant laser signal detection methods with energy brush based on SDR platforms Download PDFInfo
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- CN106357277B CN106357277B CN201610752713.2A CN201610752713A CN106357277B CN 106357277 B CN106357277 B CN 106357277B CN 201610752713 A CN201610752713 A CN 201610752713A CN 106357277 B CN106357277 B CN 106357277B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
Abstract
The invention discloses one kind to select device to enhance WCDMA infant laser signal detection methods based on SDR platforms with energy brush, is related to the detection in the faint radio signal of radio communication field and blipology.The present invention selects device by the way that energy brush is added in based on SDR Software Radio platforms, and the choosing of statistics brush is carried out to effectively improve entire SDR Software Radio platforms to the detection range of target WCDMA handset emissions signals and the accuracy of detection to the result that ascending pilot frequency energy signal calculator is calculated.The present invention energy brush select device can be obtained according to the result of calculation of ascending pilot frequency energy signal calculator the WCDMA mobile phone signals received whether be objective emission signal, to improve the accuracy of target acquisition；Data probability statistical analysis is carried out by the result of calculation to ascending pilot frequency energy signal calculator, to significantly promote the resolution ratio of critical distance, to significantly promote the distance of capture.
Description
Technical field
The present invention relates to WCDMA small-signals in radio communication field detection and its tracking technique, more particularly to
One kind selects device to enhance WCDMA infant laser signal detection methods based on SDR platforms with energy brush, has detection target WCDMA signal sources
Energy capture range is wide, the advantages such as detection accuracy height.
Background technology
As the WCDMA networks whole world is significantly spread out, more and more users carry out mobile communication with WCDMA mobile phones, specially
Net wireless communication and its rescue and relief work need accurately to detect the WCDMA signal sources of target user, in disaster
Largely save the stranded people.Since domestic WCDMA networks largely use 2.1G frequency ranges, the rate of decay of signal relative to
Other network formats faster, to influence to the investigative ranges of WCDMA target signal sources.Traditional WCDMA signals source detection side
Method is to receive wireless signal by radio-frequency front-end receiver first, and then downstream digital signal processor obtains target WCDMA hands
The uplink scrambling code of machine and its synchronous point position, then ascending pilot frequency energy signal calculator is according to uplink scrambling code and its synchronous point
The ascending pilot frequency energy for calculating target WCDMA signal sources is set, target WCDMA signal sources are accurately visited to realize
It surveys.But ascending pilot frequency energy signal calculator is typically just calculated the signal of target WCDMA signal sources transmitting by frame
Then the energy that method obtains the transmitting of final WCDMA signal sources, signal of this method for very strong WCDMA are averaging
Effectively, but when the WCDMA signals of reception are very faint will poor effect because WCDMA signal sources emit
The signal to come over can not possibly be entirely effective according to the energy come is searched out for radio transmitting rule, come according to probability theory
The relationship of the number and distance of saying effective energy is normal distribution relationship, to which conventionally being weighted for blindness is averaged
Calculating energy is had a great impact to the investigative range and accuracy of WCDMA echo signals.
It can be seen that traditional WCDMA energy detections method for the range range of the detection of target and accuracy be have it is prodigious
Limitation needs to improve.
Invention content
The problems such as there are detection range is close and its poor accuracy it is an object of the invention to overcoming existing detection method, provides
It is a kind of to select device to enhance WCDMA infant laser signal detection methods with energy brush based on SDR platforms.
Realize the technical scheme is that：
Device is selected by the way that energy brush is added in based on SDR Software Radio platforms, to ascending pilot frequency energy signal calculator
The result being calculated carries out statistics brush choosing to effectively improve entire SDR Software Radio platforms to target WCDMA hands
Machine emits the detection range of signal and the accuracy of detection.
Specifically, this method includes the following steps：
1. radio-frequency front-end receiver carries out the base station information and its target WCDMA mobile phones of downlink by front radio-frequency module
Signal is received, to prepare for subsequent Digital Signal Processing；
2. downstream digital signal processor carries out signal processing to WCDMA base station signals, by base station signal
Dissection process obtains the uplink scrambling code of target WCDMA mobile phones and its synchronous dot position information；
3. ascending pilot frequency energy signal calculator passes through the target WCDMA mobile phones that are obtained to downstream digital signal processor
Uplink scrambling code and its synchronous dot position information are handled to obtain the pilot energy of target mobile phones transmitting and its corresponding chip is inclined
Shifting value；
4. energy brush select device to the result of ascending pilot frequency energy signal calculator carry out statistics and according to brush select algorithm into
Row brush choosing, to judge effective energy number, the result to calculate pilot energy carries out statistics and its information again
Extraction again, to further promoted ascending pilot frequency energy signal calculator energy results resolution ratio, and then promoted
The capture range and its acquisition accuracy of WCDMA signals.
The present invention has following advantages and good effect：
1. it is high to capture accuracy：Energy brush selects device that can be obtained according to the result of calculation of ascending pilot frequency energy signal calculator
The WCDMA mobile phone signals received whether be objective emission signal, to improve the accuracy of target acquisition.
2. engagement range is remote：Energy brush selects device to carry out data by the result of calculation to ascending pilot frequency energy signal calculator
Probability statistical analysis, brush selects effective data from the result of calculation of ascending pilot frequency energy signal calculator, to significantly
Promotion critical distance resolution ratio, to significantly promote the distance of capture.
Description of the drawings
Fig. 1 is the block diagram of this system；
Fig. 2 is the software flow pattern that energy brush selects algorithm.
In figure：
00-the wireless base stations WCDMA；
10-SDR Software Radio platforms,
11-radio-frequency front-end receivers,
12-ascending pilot frequency energy calculators,
13-downstream digital signal processors,
14-energy brushes select device
20-WCDMA target signal sources.
English to Chinese
1、WCDMA：Wideband Code Division Multiple Access, Wideband CDMA Technology；
2、3GPP：3rd generation partnership project, 3G (Third Generation) Moblie partner program；
3、SDR：Software Defined Radio, software radio.
Specific implementation mode
It is described in detail below in conjunction with drawings and examples.
One, system
1, overall
Such as Fig. 1, this system includes the existing wireless base stations WCDMA 00 and WCDMA target signal sources 20；
It is provided with SDR Software Radio platforms 10；
The SDR Software Radio platforms 10 include radio-frequency front-end receiver 11, ascending pilot frequency energy signal calculator
12, downstream digital signal processor 13 and energy brush select device 14；Radio-frequency front-end receiver 11 and downstream digital signal processor 13
It is interacted respectively with ascending pilot frequency energy calculator 12；Downstream digital signal processor 13 and radio-frequency front-end receiver 11 interact；Energy
Amount brush selects device 14 and ascending pilot frequency energy calculator 12 to interact.
The wireless base stations WCDMA 00 send base station down wireless signal to radio-frequency front-end receiver 11；
WCDMA target signal sources 20 send up-link wireless signal to radio-frequency front-end receiver 11.
2, functional component
1) SDR Software Radio platforms
Hardware configuration：Using the hardware frame based on software radio general-purpose platform, the software radio of USRP2 has been selected
Develop hardware configuration.
Embedded module includes setting radio-frequency front-end receiver 11, ascending pilot frequency energy signal calculator 12, downstream digital letter
Number processor 13 and energy brush select device 14；
* radio-frequency front-end receiver 11：Main realize to the downlink signal of the wireless base stations WCDMA 00 receive and right
The uplink signal of WCDMA target signal sources 20 is received.
* ascending pilot frequency energy signal calculator 12：The main calculating for realizing outdoor target signal source energy, mainly in mesh
Mark signal theory position nearby left and right deviate 32 chips carry out peak value searchings and its calculate the location index of peak value to get to
Energy value and its energy value index, theoretically search out the peak value of the signal come just near theoretical value, specifically by aerogram
Number transmission delay determine.
* downstream digital signal processor 13：Mainly the downstream wireless signals received from radio-frequency front-end receiver 11 are carried out
Signal processing is to obtain the information of the physical layer parameter such as uplink scrambling code and synchronous point position of target WCDMA mobile phones.
* energy brush selects device 14：Statistics brush choosing mainly is carried out to the result of calculation of ascending pilot frequency energy signal calculator 12, from
And brush and select useful energy signal, to the detection range and its accuracy of promotion signal.
2) wireless base stations WCDMA 00
The wireless base stations WCDMA 00 are the general transmitting base stations based on international 3GPP standards, and the standard of base station is WCDMA marks
It is accurate.
4) WCDMA target signal sources 20
WCDMA target signal sources 20 are the terminals of the WCDMA standards based on international 3GPP standards, are detected
Target terminal.
3, the working mechanism of this system：
According to 3GPP agreements, the uplink and downlink of WCDMA system is that have stringent synchronous sequence relationship, at downstream digital signal
After managing the synchronous point position that device 13 obtains target WCDMA mobile phones, then ascending pilot frequency energy signal calculator 12 is according to lower line number
Synchronous point position of word signal processor 13 or so deviates the search that 32 chips start energy search and its chip offset value.Cause
For wireless signal in real process there are the delay in path and the influence of multipath delay so that chip position is typically all basis
Within the theoretical position that the sync bit of downlink obtains or so 10 chips, and the chip offset of the pilot energy of front and back two frame
Difference within 1, to according to this theoretical foundation energy brush select device 14 carry out signal energy statistics brush select work, pass through
Both the above constraints is selected effective energy and is come out to brush, to for conventional method is directly averaging for
Faint minimum detectable signal detection has good performance, conventional method that many invalid energy values is directly averaging to carry out
Averagely to reduce the resolution ratio to signal detection.New brush selects algorithm to judge if not brushing and selecting effective energy
Do not detect echo signal, and conventional method be directly averaging be cannot judge the energy calculated be it is effective or invalid,
To improve the accuracy detected to target WCDMA mobile phone signals.
Two, method
Such as Fig. 2, this method step 4. in energy brush select its working software flow of device to be：
A, one group of energy obtained from pilot energy signal calculator is captured, preserves energy value and its index value to array
- 201 in A；
B, all index values in extraction array A are stored in -202 in array B；
C, the value M of the n-th element in extraction array B, and N adds 1-203；
D, judge that the range -204 of the index M of n-th value considers prolonging for radio signal since theoretical value is near 31
Late, the value of M should be fallen between 20 to 40, carried out next step e if M values are fallen between 20 to 40, otherwise jumped to
One step c；
E, judge whether M and the difference of adjacent index value are less than or equal to 1-205, be then to enter next step f, otherwise jump
Go to step c；
F, manipulative indexing value and its energy value deposit array C-206 are extracted in array A；
G, judge N values whether be last one -207 in array B be then to enter next step h, it is no to jump to step c；
H, an array D is initialized, the index value of 20-40 is stored in array D, and the number of its index value is all set as 0-
208；
I, all index values in retrieval array C, often occur once, then the number for corresponding to the index value in array D adds 1-
209；
J, the sum of number of continuous 4 index values -210 in array D is calculated successively；
K, maximum one group of corresponding 4 index value -211 of the sum of record number；
L, the corresponding energy value of above 4 index values in retrieval array C, and it is stored in array E-212；
M, all energy values in array E are effective energy -213.
Claims (2)
1. one kind selects device to enhance WCDMA infant laser signal detection methods based on SDR platforms with energy brush, it is characterised in that：
1. radio-frequency front-end receiver by front radio-frequency module to the signal of the base station information of downlink and its target WCDMA mobile phones into
Row receives, to prepare for subsequent Digital Signal Processing；
2. downstream digital signal processor carries out signal processing to WCDMA base station signals, pass through the parsing to base station signal
Processing obtains the uplink scrambling code of target WCDMA mobile phones and its synchronous dot position information；
3. ascending pilot frequency energy signal calculator passes through the uplink of the target WCDMA mobile phones obtained to downstream digital signal processor
Scrambler and its synchronous dot position information are handled to obtain the pilot energy of target mobile phones transmitting and its corresponding chip offset value；
4. energy brush selects device to carry out statistics to the result of ascending pilot frequency energy signal calculator and selects algorithm to brush according to brush
Choosing, to judge effective energy number, the result to calculate pilot energy carries out the weight of statistics and its information again
New extraction to further promote the resolution ratio of the energy results of ascending pilot frequency energy signal calculator, and then promotes WCDMA
The capture range and its acquisition accuracy of signal.
2. as described in claim 1 select device to enhance WCDMA infant laser signal detection methods, feature based on SDR platforms with energy brush
It is：
The step 4. in energy brush select its working software flow of device to be：
A, one group of energy obtained from ascending pilot frequency energy signal calculator is captured, preserves energy value and its index value to array
In A (201)；
B, all index values in extraction array A are stored in array B (202)；
C, the value M of the n-th element in extraction array B, and N adds 1 (203)；
D, judge that the range (204) of the index M of n-th value considers the delay of radio signal, M since theoretical value is near 31
Value should fall between 20 to 40, carry out next step e if M values are fallen between 20 to 40, otherwise jump to one
Step c；
E, judge whether M and the difference of adjacent index value are less than or equal to 1 (205), be then to enter next step f, otherwise redirect
To step c；
F, manipulative indexing value and its energy value deposit array C (206) are extracted in array A；
G, judge whether N values are one (207) last in array B, be then to enter next step h, otherwise jump to step c；
H, an array D is initialized, the index value of 20-40 is stored in array D, and the number of its index value is all set as 0 (208)；
I, all index values in retrieval array C, often occur once, then the number for corresponding to the index value in array D adds 1 (209)；
J, the sum of number of continuous 4 index values (210) in array D is calculated successively；
K, maximum one group of corresponding 4 index value (211) of the sum of record number；
L, the corresponding energy value of above 4 index values in retrieval array C, and it is stored in array E (212)；
M, all energy values in array E are effective energy (213).
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| CN106357277B true CN106357277B (en) | 2018-08-31 |
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| CN112737703B (en) * | 2020-12-21 | 2023-04-28 | 武汉虹旭信息技术有限责任公司 | Mobile communication signal source detection method and device, electronic equipment and storage medium |
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| CN104410482A (en) * | 2014-12-08 | 2015-03-11 | 武汉虹旭信息技术有限责任公司 | Synchronization system for realizing WCDMA (wideband code division multiple access) by using TDM (timing-division multiplexing) based on FPGA (field programmable gate array) platform |
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| SG124302A1 (en) * | 2005-01-13 | 2006-08-30 | Oki Techno Ct Singapore Pte | Architecture and protocol for software defined radio system |
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Patent Citations (5)
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| CN101524271A (en) * | 2009-04-01 | 2009-09-09 | 成都途筏达科技有限公司 | Electrocardio cellphone monitoring method without base station or satellite signal |
| CN101730122A (en) * | 2009-12-11 | 2010-06-09 | 北京北方烽火科技有限公司 | User detection device suitable for CDMA2000 network and method |
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| CN104244282A (en) * | 2014-10-11 | 2014-12-24 | 武汉虹旭信息技术有限责任公司 | Method for detecting WCDMA (wideband code division multiple access) signal source with aid of wireless data transmission module on basis of SDR (system definition record) platform |
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