CN108377505A - TDD-LTE and FDD-LTE mobile phone uplink signal detecting systems - Google Patents
TDD-LTE and FDD-LTE mobile phone uplink signal detecting systems Download PDFInfo
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- CN108377505A CN108377505A CN201710884306.1A CN201710884306A CN108377505A CN 108377505 A CN108377505 A CN 108377505A CN 201710884306 A CN201710884306 A CN 201710884306A CN 108377505 A CN108377505 A CN 108377505A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses TDD LTE and FDD LTE mobile phone uplink signal detecting systems, it is related to signal detection technical field；TDD LTE synchronization modules carry out completing cell searching and the wireless signaling processing of TD LTE wireless networks automatically, obtain accurate TDD uplink and downlink timeslots timing, uplink and downlink timeslot than information, are exported uplink and downlink timeslot indication signal by GPIO interface；TD SCDMA synchronization modules are automatically performed cell searching and the wireless signaling processing of TD SCDMA wireless networks, obtain accurate TD SCDMA descending time slots timing, descending time slot information, are exported descending time slot indication signal by GPIO interface；The present invention detects receiving channel by sequence control and only has upstream time to start detecting, and system sensitivity meets design requirement, and detection range is remote, and thoroughly solving base station downlink signal, detecting system malfunctions together.
Description
Technical field：
The present invention relates to TDD-LTE and FDD-LTE mobile phone uplink signal detecting systems, belong to signal detection technical field.
Background technology：
Existing market mobile phone signal detector is mostly FDD operating mode detectors, and with popularizing for 4G cell phone system, it includes
FDD and tdd mode, then detector cannot accurately detect tdd mode system mobile phone signal in the market, performance wrong report and detection
Distance is close.Current existing TD-LTE mobile phone signals detector operating mode is continuously uninterruptedly to detect uplink and downlink signals simultaneously, only
If the uplink signal detector of TD-LTE signal frequency ranges, base station downlink signal and handset emissions all can equally collect, in this way
Defect is that receiving sensitivity cannot be excessively high, and excessively high downlink base station signal can cause to malfunction, so detecting system sensitivity shows
Contradictory, system causes detection range close.
Invention content：
In view of the above-mentioned problems, the technical problem to be solved in the present invention is to provide the detectings of TDD-LTE and FDD-LTE mobile phone uplink signals
System.
The present invention TDD-LTE and FDD-LTE mobile phone uplink signal detecting systems, it include TDD-LTE synchronization modules,
TD-SCDMA synchronization modules, MCU＆ Ethernets control circuit, Receiver Module, power supply；TDD-LTE synchronization modules, TD-
SCDMA synchronization modules are electrically connected with MCU＆ Ethernet control circuits, and TDD-LTE synchronization modules carry out completing TD-LTE automatically
The cell searching and wireless signaling of wireless network are handled, and obtain accurate TDD uplink and downlink timeslots timing, uplink and downlink timeslot ratio
Information is exported uplink and downlink timeslot indication signal by GPIO interface；TD-SCDMA synchronization modules be automatically performed TD-SCDMA without
The cell searching and wireless signaling of gauze network are handled, and obtain accurate TD-SCDMA descending time slots timing, descending time slot letter
Breath, is exported descending time slot indication signal by GPIO interface；Antenna is picked up aerial carrier network by Receiver Module to be believed
Number signal is given to low noise amplifier 30 and amplification through low pass or the filtering of high-pass filter 301, then through splitter 701
It is divided into two paths of signals respectively through uplink and downlink channel, upstream filter is by uplink band signal, under downstream filter passes through
Line frequency segment signal, then signal then give the radiofrequency signal of amplification to peak value logarithm through three-level low noise and three-level filtering device again
Wave detector, detection output flip-flop signal give MCUADC I O functions port respectively, and MCU is carried out by preset program at ADC
Reason；MCU＆ Ethernet control circuits are detector system processing centers, and the various functions of completion system are executed by scheduled program,
By several ADC processing, certain thresholding is set, each sense channel is made to complete detection, to tdd mode network signal, synchronous mould
It is detection work order that block, which provides time slot signal, and MCU is instructed according to time slot by preset program upstream time to be started to detect, when downlink
Between close detection, thus realize TDD-lte＆TD-SCDMA real meanings realize the time-division detection, detection mobile phone uplink signal；
Ethernet turns serial communication module, realize turn serial ports 45 by Ethernet turn 10 feet of serial communication module, 11 foot TRX with
MCU is communicated, and power supply carries out system power supply.
Preferably, the TDD-LTE synchronization modules are after the power is turned on, antenna pickup to TD-LTE network signals, cell searching
Flow is as follows：PSS is first searched for, 5ms timing informations and OFDM symbol time etc. is obtained, then searches for SSS, obtains 10ms timings
Information and cell group ID, then carry out more accurate time and Frequency Synchronization；Next to read MIB and SIB information,
The uplink and downlink timeslot ratio and special subframe format information of TDD are obtained in SIB information.
Preferably, the antenna pickup of the TD-SCDMA synchronization modules is coupled to aerial signal through capacitance 301, then
Filtered device 301 filters out the coupled capacitance of useful signal 302 and gives the amplification of low noise amplifier 301, then again through one
The filter 302 of grade filters, then filters out clean TD-SCDMA through the amplification of low noise amplifier 302 and filter 303 and believe
Number, the signal of amplification is controlling signal decaying through numerical-control attenuator 305, then again through two-stage amplification and two stage filter circuit,
Coupled capacitor 320 is input a signal into and carries out envelope detection to wave detector 1 by signal, and the direct current signal after detection is by examining
The 11st foot of MCU, wave detector 201 is given in the 6th foot output of wave device 1 by resistance 1, resistance 1,
Then MCU handles the rectified signal from wave detector by preset program, by handle operation and by wave detector 201
29 feet export TD-SCDMA synchronizing signals, are exported in 7 feet through connector 203 and make synchronous identification letter to MCU control unit
Number.
Preferably, it also includes detecting module, the received antenna of detecting module picks up aerial signal, coupled electricity
Hold 301 couplings and give signal to low-pass filter 301, then coupled capacitance 302 gives low noise amplifier 30
One amplifies signal, and the signal of amplification gives power splitter 701 through capacitance 307 and divides the signal into two-way, gives respectively
Row and down going channel, wherein signal gives 2 feet of downlink signal filter 302 all the way, the output of 5 feet exists through capacitance 308
By low noise amplifier 302 amplify, then signal filtered device 303 filter, then signal again through two-stage amplification and
It is filtered, then 5 foot meridian capacitors 302 of the filtered device of signal 305 give low noise amplifier 401 logarithmic detector
1 foot detection of device, 6 feet of the signal through low noise amplifier 401 are exported through electronics 408 to Receiver Module four after detection
015,6 feet, which export, gives master control borad MCU processing；Another way signal gives the filter of data feedback channel through power splitter 701
Then 2012 feet input, the output of 5 feet also pass through three-level low noise and three-level filtering, last filtered device 204
5 feet are output to the 1 foot input of wave detector 1, and 5 feet are output to the 7 of Receiver Module 401,8 after signal demodulator processing
Foot, which exports, gives system board MCU processing.
Preferably, the MCU＆ Ethernets control circuit mainly turns string by one zero one ＆ Ethernets of the low noise amplifier of MCU
Mouth communication module core element composition, 5 feet, 6 feet output downlink detection signal and the radio frequency reception of Receiver Module 401
7 feet of module 401,8 foot uplink detection signals give mainboard 301 to mainboard 312 and correspond to pin uplink signal respectively
5 feet, 6 feet do uplink mobile phone signal detection downlink signal, and 7 feet, 8 feet do the instruction of downlink signal field strength, then the low noise of MCU
The CH1-CH24 feet of big device 1 do ADC signal and acquire and handled by preset program, detection mobile operator frequency division multiplexings letter
Number FDD is judgment basis according to detection level, detection be more than setting voltage value then the low noise amplifier 1 of MCU 50
Foot is sent out high level driving triode 209 and is connected, and then relay 201 acts, while the low noise amplifier one of MCU
01 55 feet are sent out high level driving triode 207 and are connected, and the then action of triode 206 exports high level to bus
Two 3 foot output alarm signals；When detecting mobile operator time multiplexing signals TDD according to detection level+synchronization module output
7 feet, 8 foot time slot signals and enable signal that gap signal gives mainboard 313 to three First Five-Year Plan of mainboard give the low noise amplification of MCU
The 89-91 feet of device 1, MCU receive Sync_s＆Sync_s_EN signals and are penetrated according to TD-LTE in upstream time by preset program
Frequency receiving module detection level is judgment basis, and detection is more than the 50 of setting voltage value and then the low noise amplifier 1 of MCU
Foot is sent out high level driving triode 209 and is connected, and then relay 201 acts, while the low noise amplifier 1 of MCU
One 55 feet are sent out high level driving triode 207 and are connected, and the then action of triode 206 exports high level to bus two
3 foot output alarm signals；Wherein Sync_s_EN be high level according to Sync_s signals, the low noise only in upstream time MCU
The 89-91 feet of amplifier 1 do ADC acquisitions, according to preset program by communication interface, low noise amplifier 401 and with
Too net turns serial communication module realization functional parameter setting and the linkage centralized management of multimachine combined system.
Compared with prior art, beneficial effects of the present invention are：When there was only uplink by sequence control detecting receiving channel
Between start detecting, system sensitivity meets design requirement, and detection range is remote, thoroughly solves base station downlink signal detecting system together
Malfunction.
Description of the drawings：
The present invention is described in detail by following specific implementations and attached drawing for ease of explanation,.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the block diagram of TDD-LTE synchronization modules in the present invention；
Fig. 3 is the flow chart of cell search signals in the present invention；
Fig. 4 is the structure diagram of TD-SCDMA synchronization modules in the present invention；
Fig. 5 is the structure diagram of Receiver Module in the present invention；
Fig. 6 a to Fig. 6 e are the circuit diagram of MCU＆ Ethernet control circuits in the present invention；
Fig. 7 a to Fig. 7 d are the circuit diagram of TDD-LTE synchronization modules in the present invention；
Fig. 8 a to Fig. 8 d are the circuit diagram of TD-SCDMA synchronization modules in the present invention；
Fig. 9 a to Fig. 9 d are the circuit diagram of Receiver Module in the present invention；
Figure 10 is the schematic diagram of MCU＆ Ethernet control circuits in the present invention.
Specific implementation mode：
In order to make the objectives, technical solutions and advantages of the present invention clearer, below by specific implementation shown in the accompanying drawings
Example describes the present invention.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit the scope of the present invention.This
Outside, in the following description, descriptions of well-known structures and technologies are omitted, so as not to unnecessarily obscure the concept of the present invention.
As shown in Figures 1 to 10, present embodiment uses following technical scheme：It include TDD-LTE synchronization modules,
TD-SCDMA synchronization modules, MCU＆ Ethernets control circuit, Receiver Module, power supply；TDD-LTE synchronization modules, TD-
SCDMA synchronization modules are electrically connected with MCU＆ Ethernet control circuits, and TDD-LTE synchronization modules carry out completing TD-LTE automatically
The cell searching and wireless signaling of wireless network are handled, and obtain accurate TDD uplink and downlink timeslots timing, uplink and downlink timeslot ratio
Information is exported uplink and downlink timeslot indication signal by GPIO interface；TD-SCDMA synchronization modules be automatically performed TD-SCDMA without
The cell searching and wireless signaling of gauze network are handled, and obtain accurate TD-SCDMA descending time slots timing, descending time slot letter
Breath, is exported descending time slot indication signal by GPIO interface；Antenna is picked up aerial carrier network by Receiver Module to be believed
It number gives signal to low noise amplifier 30 and U301 through low pass or high-pass filter 301 F301 filtering and amplifies, then through branch
701 S701 of device is divided into two paths of signals respectively through uplink and downlink channel, and upstream filter passes through uplink band signal, downlink
Filter is by band downlink signal, and then signal is again through three-level low noise and three-level filtering device then by the radiofrequency signal of amplification
Peak value logarithmic detector is given, detection output flip-flop signal (0.5-1.8V) gives MCUADC I O functions port respectively,
MCU carries out ADC processing by preset program；MCU＆ Ethernet control circuits are detector system processing centers, by scheduled program
The various functions for executing completion system set certain thresholding by several ADC processing, and each sense channel is made to complete detection, right
Tdd mode network signal, it is detection work order that synchronization module, which provides time slot signal, and MCU instructs (TD-LTE synchronizations according to time slot
Module exports synchronizing signal) start to detect by preset program upstream time, downgoing time closes detection, thus realizes TDD-
Lte＆TD-SCDMA real meanings realize time-division detection, detection mobile phone uplink signal.Ethernet turns serial communication module U402,
It realizes and turns 10 feet, 11 foot TRX and MCU communications that 45 RJ45 of serial ports turns serial communication module U402 by Ethernet, power supply
Carry out system power supply.
Further, after the power is turned on, antenna is picked up to TD-LTE network signals, cell searching the TDD-LTE synchronization modules
Flow is as follows：As shown in figure 3, first searching for PSS, 5ms timing informations and OFDM symbol time etc. are obtained, SSS is then searched for, is obtained
To 10ms timing informations and cell group ID, more accurate time and Frequency Synchronization are then carried out；Next for read MIB and
SIB information obtains the information such as uplink and downlink timeslot ratio and the special subframe format of TDD in SIB information.
16 feet of J201 export down-going synchronous indication signal, and the 3 feet progress level conversion for being then delivered to U201 becomes 3.3V
Level is exported by 4 feet through U203 and door transformation, exports downlink synchronous signal to 93 feet of MCU in 6 feet through J203,
The foot signal is done the synchronization identification signal that ADC detections port differentiates by control unit, which is height
Level, upstream time are low level, and the ADC acquisition channels of MCU are just opened by preset program in upstream time according to this feature
Detection channel acquires ADC work, realizes that TDD-LTE system only recycles detecting acquisition in upstream time.
Further, the antenna pickup of the TD-SCDMA synchronization modules is coupled to aerial signal through 301 C301 of capacitance
301 F301 of filtered device filters out coupled 302 C302 of capacitance of useful signal and gives low noise amplifier 301 U301 again
The amplification then filter 302 F302 filtering through level-one again, then through 302 U302 of low noise amplifier amplifications and filter three
03 F303 filter out clean TD-SCDMA signals, and the signal of amplification is decayed through numerical-control attenuator 305 U305 control signals,
Then 320 C320 of coupled capacitor is input a signal into wave detector 1 through two-stage amplification and two stage filter circuit, signal again
One U101 carries out envelope detection, and the direct current signal after detection passes through resistance 1 by the 6th foot output of one zero one U101 of wave detector
Six R106, one zero nine R109 of resistance give the 11st foot of MCU, 201 U201 of wave detector, and then MCU is handled by preset program
Rectified signal from wave detector, by handling operation and exporting TD- by 29 feet of 201 U201 of the wave detector of MCU
SCDMA synchronizing signals export in 7 feet through 203 P203 of connector and do synchronous identification signal to MCU control unit.
Further, it also includes detecting module, and the received antenna of detecting module picks up aerial signal, coupled electricity
Hold 301 C301 coupling by signal give 301 F301 of low-pass filter then 302 C302 of coupled capacitance give it is low
301 U301 of amplifier that makes an uproar amplifies signal, and the signal of amplification gives power splitter 701 S701 through 307 C307 of capacitance
Two-way is divided the signal into, gives uplink and downlink channel respectively, wherein signal gives downlink signal filter 302 all the way
2 feet of F302, the output of 5 feet through 308 C308 of capacitance by 302 U302 of low noise amplifier amplifications then signal through filter
303 F303 of wave device is filtered, and then signal amplifies and is filtered through two-stage again, then filtered 305 F305 of device of signal
5 foot meridian capacitor, 302 C320 give 1 foot detection of 401 U401 logarithmic detectors of low noise amplifier, signal passes through after detection
6 feet of 401 U401 of low noise amplifier export 5,6 feet to 401 J401 of Receiver Module through 408 R408 of electronics
It exports and gives master control borad MCU processing；Another way signal gives the filter 201 of data feedback channel through 701 S701 of power splitter
2 feet of F201 input, and then the output of 5 feet also passes through three-level low noise and three-level filtering, 204 F204 of last filtered device
5 feet be output to one zero one U101 of wave detector 1 foot input, signal demodulator processing after 5 feet be output to Receiver Module 40
7,8 feet of one J401, which export, gives system board MCU processing.It should be noted that the corresponding low-pass filter of different frequency range receiving module and
Bandpass filter does corresponding matching；Because Receiver Module circuit and PCB are identical, filter has corresponding in different network formats
Match, for example telecommunications CDMA800MHZ network formats so filter uses low-pass filter, bandpass filter to use uplink 825-
835MHZ, downlink 870-880MHZX filters, mobile and unicom GSM900MHZ network formats receiving module filters also use
Low-pass filter, bandpass filter use uplink 890- 915MHZ, downlink 930-960MHZX filters；Mobile and unicom
GSM1800MHZ network formats receiving module filters need that high-pass filter, bandpass filter is used to use uplink 1710-
1750MHZ, downlink 1805-1850MHZX filters；Unicom WCDMA network formats receiving modules need to use high-pass filter,
Bandpass filter uses uplink 1920- 1980MHZ, downlink 2110-2170MHZX filters etc. that could take out useful letter in this way
Number inhibit garbage signal.
Further, the MCU＆ Ethernets control circuit is mainly by one zero one U101 of the low noise amplifier of MCU
(STM32F205ZGT6) ＆ Ethernets turn serial communication module U402 (IPort-2) core element composition, Receiver Module four
5 feet of 01 J401,6 feet output downlink detection signal (DC voltage range 0.5-1.8V correspond to receiving sensitivity -75~-
25dBm) with 7 feet of 401 J401 of Receiver Module, (DC voltage range 0.5-1.8V is corresponding for 8 foot uplink detection signals
Receiving sensitivity -85~-25dBm) mainboard 301 is given respectively corresponds to pin uplink signal to 312 J301-J312 of mainboard
5 feet, 6 feet do uplink mobile phone signal detection downlink signal, and 7 feet, 8 feet do the instruction of downlink signal field strength, then the low noise of MCU
The CH1-CH24 feet of one zero one U101 of big device do ADC signal and acquire and handled by preset program, and detection mobile operator frequency divisions are multiple
With signal FDD (such as GSM900 standards, uplink 890-915MHZ, downlink 925-960MHZ)), according to detection level (0.5-1.8V)
For judgment basis, detection is more than that the 50 feet submitting high level for one zero one U101 of low noise amplifier for setting voltage value and then MCU drives
The 209 Q209 conductings of dynamic triode, then 201 JK201 of relay is acted, while the low noise amplifier 1 of MCU
55 feet of U101 send out high level driving triode 207 Q207 conductings, then the high electricity of 206 Q206 of triode actions output
It puts down to the 3 foot output alarm signals of two JP201 of bus；Mobile operator time multiplexing signals TDD is detected according to detection level
(0.5-1.8V)+synchronization module output time solt signal gives 7 feet, 8 feet of the mainboard 313 to three First Five-Year Plan of mainboard J313-J315
Time slot signal and enable signal (Sync_s＆Sync_s_EN, which works as, receives signal as high level) give the low noise amplifier of MCU
The 89-91 feet of one zero one U101, MCU receive Sync_s＆Sync_s_EN signals by preset program in upstream time according to TD-LTE
Receiver Module detection level (0.5-1.8V) is judgment basis, and detection is more than setting voltage value and then the low noise amplification of MCU
50 feet of one zero one U101 of device send out high level 209 Q209 of driving triode conductings, and then 201 JK201 of relay is dynamic
Make, while 55 feet of one zero one U101 of low noise amplifier of MCU send out high level driving triode 207 Q207 conductings, then
Triode 206 Q206 actions export 3 foot output alarm signals of the high level to two JP201 of bus；Wherein Sync_s_EN is
High level is only ADC in the 89-91 feet of one zero one U101 of low noise amplifier of upstream time MCU and adopts according to Sync_s signals
Collection, turns serial communication module according to preset program by communication interface RS- 485,401 U401 of low noise amplifier and Ethernet
U402 realizes functional parameter setting (detection threshold) and the linkage centralized management of multimachine combined system.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (5)
1.TDD-LTE and FDD-LTE mobile phone uplink signal detecting systems, it is characterised in that：It include TDD-LTE synchronization modules,
TD-SCDMA synchronization modules, MCU＆ Ethernets control circuit, Receiver Module, power supply；TDD-LTE synchronization modules, TD-
SCDMA synchronization modules are electrically connected with MCU＆ Ethernet control circuits, and TDD-LTE synchronization modules carry out completing TD-LTE automatically
The cell searching and wireless signaling of wireless network are handled, and obtain accurate TDD uplink and downlink timeslots timing, uplink and downlink timeslot than letter
Breath, is exported uplink and downlink timeslot indication signal by GPIO interface；It is wireless that TD-SCDMA synchronization modules are automatically performed TD-SCDMA
The cell searching and wireless signaling of network are handled, and obtain accurate TD-SCDMA descending time slots timing, descending time slot information, are led to
GPIO interface is crossed to export descending time slot indication signal；Antenna is picked up aerial carrier network signal through low by Receiver Module
The filtering of logical or high-pass filter 301 gives signal to low noise amplifier 30 and amplification, then is divided into two through splitter 701
For road signal respectively through uplink and downlink channel, upstream filter passes through band downlink by uplink band signal, downstream filter
Signal, then signal then give the radiofrequency signal of amplification to peak value logarithmic detector through three-level low noise and three-level filtering device again
Device, detection output flip-flop signal give MCUADC I O functions port respectively, and MCU carries out ADC processing by preset program；
MCU＆ Ethernet control circuits are detector system processing centers, and the various functions of completion system are executed by scheduled program, are led to
Several ADC processing are crossed, certain thresholding is set, so that each sense channel is completed detection, to tdd mode network signal, synchronization module
It is detection work order to provide time slot signal, and MCU is instructed according to time slot to be started to detect by preset program upstream time, downgoing time
Detection is closed, thus realizes that TDD-lte＆TD-SCDMA real meanings realize time-division detection, detection mobile phone uplink signal；With
Too net turns serial communication module, realize turn serial ports 45 by Ethernet turn 10 feet of serial communication module, 11 foot TRX with
MCU is communicated, and power supply carries out system power supply.
2. TDD-LTE and FDD-LTE mobile phones uplink signal detecting system according to claim 1, it is characterised in that：It is described
After the power is turned on, to TD-LTE network signals, cell searching flow is as follows for antenna pickup for TDD-LTE synchronization modules：PSS is first searched for, is obtained
To 5ms timing informations and OFDM symbol time etc., SSS is then searched for, obtains 10ms timing informations and cell group ID, is then carried out
More accurate time and Frequency Synchronization；Next to read MIB and SIB information, the uplink and downlink of TDD is obtained in SIB information
Time slot ratio and special subframe format information.
3. TDD-LTE and FDD-LTE mobile phones uplink signal detecting system according to claim 1, it is characterised in that：It is described
TD-SCDMA synchronization modules antenna pickup to aerial signal through capacitance 301 couple, then filtered device 301 filter out it is useful
The coupled capacitance of signal 302 gives the amplification of low noise amplifier 301, and then the filter 302 through level-one filters again,
Clean TD-SCDMA signals are filtered out through the amplification of low noise amplifier 302 and filter 303 again, the signal of amplification is through numerical control
Attenuator 305 controls signal decaying, and then again through two-stage amplification and two stage filter circuit, signal is by coupled capacitor 320
It inputs a signal into and carries out envelope detection to wave detector 1, the direct current signal after detection is defeated by the 6th foot of wave detector 1
Go out to give the 11st foot of MCU, wave detector 201 by resistance 1, resistance 1, then MCU is handled by preset program
Rectified signal from wave detector, by handle operation and by wave detector 201 29 feet export TD-SCDMA synchronize letter
Number, it is exported in 7 feet through connector 203 and does synchronous identification signal to MCU control unit.
4. TDD-LTE and FDD-LTE mobile phones uplink signal detecting system according to claim 1, it is characterised in that：It is also
Including detecting module, the received antenna of detecting module picks up aerial signal, and signal is sent in the coupling of coupled capacitance 301
To low-pass filter 301, then coupled capacitance 302 gives low noise amplifier 301 and amplifies signal, amplification
Signal gives power splitter 701 through capacitance 307 and divides the signal into two-way, gives uplink and downlink channel respectively, wherein one
Road signal gives 2 feet of downlink signal filter 302, the output of 5 feet through capacitance 308 by low noise amplifier 302
Amplify, then signal is filtered in filtered device 303, and then signal amplifies and is filtered through two-stage again, and then signal is through filter
5 foot meridian capacitors 302 of wave device 305 give 1 foot detection of 401 logarithmic detector of low noise amplifier, signal after detection
5,6 feet that 6 feet through low noise amplifier 401 export through electronics 408 to Receiver Module 401 are exported to master control
Plate MCU processing；Another way signal gives the 2 feet input of the filter 201 of data feedback channel through power splitter 701, and 5 feet are defeated
Go out, then also pass through three-level low noise and three-level filtering, 5 feet of last filtered device 204 are output to wave detector 1
The input of 1 foot, 5 feet are output to the 7 of Receiver Module 401,8 feet and export at system board MCU after signal demodulator processing
Reason.
5. TDD-LTE and FDD-LTE mobile phones uplink signal detecting system according to claim 1, it is characterised in that：It is described
MCU＆ Ethernets control circuit mainly turns serial communication module core element group by one zero one ＆ Ethernets of the low noise amplifier of MCU
At on 5 feet of, Receiver Module 401,7 feet of 6 feet output downlink detection signal and Receiver Module 401,8 feet
Row detection signal gives mainboard 301 to 5 foot of the correspondence pin of mainboard 312 uplink signal, 6 feet and does uplink mobile phone signal respectively
Downlink signal is detected, 7 feet, 8 feet do the instruction of downlink signal field strength, then the CH1-CH24 feet of the low noise amplifier 1 of MCU
It does ADC signal to acquire and handle by preset program, detects mobile operator frequency-division multiplex singal FDD, be to sentence according to detection level
Determine foundation, detection is more than that the 50 feet submitting high level for the low noise amplifier 1 for setting voltage value and then MCU drives triode
209 conductings, then relay 201 acts, while 55 feet of the low noise amplifier 1 of MCU send out high level driving
Triode 207 is connected, and the then action of triode 206 exports 3 foot output alarm signals of the high level to bus two；Detection
Mobile operator time multiplexing signals TDD gives mainboard 313 to master according to detection level+synchronization module output time solt signal
7 feet of three First Five-Year Plan of plate, 8 foot time slot signals and enable signal give the 89-91 feet of the low noise amplifier 1 of MCU, and MCU is received
It is judgement that Sync_s＆Sync_s_EN signals detect level in upstream time by preset program according to TD-LTE Receiver Modules
Foundation, detection are more than that the 50 feet submitting high level for the low noise amplifier 1 for setting voltage value and then MCU drives triode
209 conductings, then relay 201 acts, while 55 feet of the low noise amplifier 1 of MCU send out high level driving
Triode 207 is connected, and the then action of triode 206 exports 3 foot output alarm signals of the high level to bus two；Wherein
Sync_s_EN be high level according to Sync_s signals, the 89-91 feet only in the low noise amplifier 1 of upstream time MCU
ADC acquisitions are done, turning serial communication module by communication interface, low noise amplifier 401 and Ethernet according to preset program realizes
Functional parameter is set and the linkage centralized management of multimachine combined system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710884306.1A CN108377505B (en) | 2017-09-26 | 2017-09-26 | TDD-LTE and FDD-LTE mobile phone uplink signal detection system |
Applications Claiming Priority (1)
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