CN106941382A - The self calibration implementation method and device of a kind of radio frequency matrix switch - Google Patents
The self calibration implementation method and device of a kind of radio frequency matrix switch Download PDFInfo
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- CN106941382A CN106941382A CN201610004170.6A CN201610004170A CN106941382A CN 106941382 A CN106941382 A CN 106941382A CN 201610004170 A CN201610004170 A CN 201610004170A CN 106941382 A CN106941382 A CN 106941382A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electronic Switches (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention discloses a kind of self calibration implementation method of radio frequency matrix switch, including：Obtain the radiofrequency signal of RF Phase-Lock Loop (PLL) output；The power of the radiofrequency signal of the output is detected, and reads received signal strength indicator (RSSI) value detected in the radio frequency reception channel of radio frequency matrix switch；RSSI value on each passage detected is compared with a reference value of corresponding frequency, when the absolute value of both differences is less than default first threshold, determines that respective channel has completed the self calibration under current frequency.The present invention further simultaneously discloses a kind of self calibration of radio frequency matrix switch and realizes device.
Description
Technical field
Realize that technology, more particularly to a kind of radio frequency matrix are opened the present invention relates to tester in wireless communication field
The self calibration implementation method and device of pass.
Background technology
In current mobile radio communication, due to network planning and the design requirement of networking, in wireless communication system
Remote Radio Unit (RRU, Radio Remote Unit) is MIMO pattern, and this is going out to RRU
Calibration and wireless performance test during factory bring cumbersome flow, for example：Using artificial thread-changing mode
RRU is tested, not only inefficiency, and easily because maloperation causes production batch to be done over again, it is impossible to
The requirement of batching delivery is met, the development of wireless communication technology under the new situation is also not suitable with, accordingly, it would be desirable to seek
A kind of radio frequency matrix switch or other devices is looked for realize the target of automatic test.
At present, usual way RRU calibrated and tested is：By power splitter or combiner, such as：
1 point of 8 power splitter or 81 combiners of conjunction, using up test and the separated method of descending test, such as Fig. 1
With shown in Fig. 2.This method needs to increase by one of test step, not only inefficiency, and easily manufacturing
The chaotic phenomenon of process.Simultaneously as each access port standing wave of power splitter or combiner is poor, isolation
Index can not meet the limitation of test request, therefore, and application places can be caused to be limited, do not possess replicability.
However, there is a kind of more advanced technical scheme to be in the prior art：It is real using radio frequency matrix switch
Existing automatic test, as shown in figure 3, radio frequency matrix switch is applied in RRU test environment, passes through
Background test software is controlled to instrument and measured piece, forms automatic test platform.With Fig. 1 and Fig. 2
Shown method is compared, though method shown in Fig. 3 has advanced and replicability, in the traditional sense
Radio frequency matrix switch because the assembling mode of its internal coaxial switch it is different, cost price difference is larger.For example：
The complete matrix RF switch of 12 common ports, the Topology connection mode of its internal coaxial switch as shown in figure 4,
This connection needs 14 1 × 2 coaxial switches and 41 × 6 coaxial switches, the coaxial switch cascade of composition three-level
Mode.Each port standing wave for the radio frequency matrix switch which is assembled into, passage Insertion Loss, channel isolation
And phase difference can reach ideal indicator, and suitable for the measured piece test of no more than 12 ports；But this
Cascade system use coaxial switch quantity it is many, space-consuming is big, internal wiring is complicated, high cost.
Simultaneously as existing radio frequency matrix switch only possesses the function of different passage switchings, it can realize automatic
Change the target of test, and the calibration and maintenance for radio frequency matrix switch itself do not consider wherein, work(
Can be more single, cause radio frequency matrix switch calibration process cumbersome, need to by external vector network analyzer,
The instrument such as signal source or frequency spectrograph, could judge whether each passage index of radio frequency matrix switch is normal.
Moreover, user can not also obtain the working condition of coaxial switch in radio frequency matrix switch, to judge radio frequency matrix
Whether switch performance is normal, and whether needs provision for disengagement, this maintenance band to instrument in use
Carry out very big inconvenience.
The content of the invention
In view of this, the embodiment of the present invention expect to provide a kind of self calibration implementation method of radio frequency matrix switch and
Device, can realize can self calibration, the intelligent radio frequency matrix switch of easy care.
To reach above-mentioned purpose, what the technical scheme of the embodiment of the present invention was realized in：
The embodiment of the present invention provides a kind of self calibration implementation method of radio frequency matrix switch, and methods described includes：
Obtain the radiofrequency signal of RF Phase-Lock Loop (PLL, Phase Locking Loop) output；
The power of the radiofrequency signal of the output is detected, and is read in the radio frequency reception channel of radio frequency matrix switch
Received signal strength indicator (RSSI, the Received Signal Strength Indication) value detected；
RSSI value on each passage detected is compared with a reference value of corresponding frequency, both are poor
When the absolute value of value is less than default first threshold, determine that respective channel has completed the self-correcting under current frequency
It is accurate.
In such scheme, the radio frequency matrix switch includes 14 coaxial switches；14 coaxial switches
Including 12 1 point 2 switch and 21 point 12 switch, two-stage cascade mode is constituted.
In such scheme, methods described also includes：A register address is distributed to each coaxial switch,
According to the switching times of the change of the register address values distributed, in real time record correspondence coaxial switch.
In such scheme, the every of the coaxial switch includes drive circuit all the way；
Methods described also includes：The drive circuit is the voltage and electricity needed for the coaxial switch offer work
Stream, and assist the coaxial switch to realize disconnection and the closure of passage.
In such scheme, reference clock during PLL work is 10MHz clock signals, and output is penetrated
The frequency range of frequency signal is 100MHz~3.5GHz；
The first threshold is set according to the loss of RF cable and the passage Insertion Loss of the radio frequency matrix switch
Put.
The embodiment of the present invention also provides a kind of self calibration of radio frequency matrix switch and realizes device, and described device includes：
Acquisition module, the radiofrequency signal for obtaining PLL outputs；
Read module, the power of the radiofrequency signal for detecting the output are detected, and reads radio frequency matrix and is opened
The RSSI value detected in the radio frequency reception channel of pass；
Self calibration judge module, for by base of the RSSI value on each passage detected with corresponding frequency
Quasi- value is compared, and when the absolute value of both differences is less than default first threshold, determines that respective channel is complete
Into the self calibration under current frequency.
In such scheme, the radio frequency matrix switch includes 14 coaxial switches；14 coaxial switches
Including 12 1 point 2 switch and 21 point 12 switch, two-stage cascade mode is constituted.
In such scheme, described device also includes：Coaxial switch switches logging modle, for same to each
Axle switch one register address of distribution, according to the change of the register address values distributed, real-time record pair
Answer the switching times of coaxial switch.
In such scheme, described device also includes：Coaxial switch drive module, described is coaxially opened for driving
Close per all the way, to provide the voltage and current needed for the coaxial switch work, and assist described coaxially to open
Close disconnection and the closure for realizing passage.
In such scheme, reference clock during PLL work is 10MHz clock signals, and output is penetrated
The frequency range of frequency signal is 100MHz~3.5GHz；
The first threshold is set according to the loss of RF cable and the passage Insertion Loss of the radio frequency matrix switch
Put.
The embodiment of the present invention also provides a kind of self-alignment radio frequency matrix switch, and the radio frequency matrix switch includes
The self calibration of radio frequency matrix switch described in any of the above-described realizes device.
The self calibration implementation method and device for the radio frequency matrix switch that the embodiment of the present invention is provided, obtain PLL
The radiofrequency signal of output, detects the power of the radiofrequency signal of output, and reads the radio frequency of radio frequency matrix switch and connect
The RSSI value detected on passage is received, by base of the RSSI value on each passage detected with corresponding frequency
Quasi- value is compared, and when the absolute value of both differences is less than default first threshold, determines that respective channel is complete
Into the self calibration under current frequency.Thus, can not only realize can self calibration, the intellectuality of easy care penetrate
Frequency matrix switch, also solve many coaxial switch quantity in existing 12 port radio frequency matrix switch, high cost,
Calibration and maintenance process are cumbersome, and the problem of unitary function.
Further, the radio frequency matrix switch of the embodiment of the present invention is using 14 coaxial switch composition two-stage cascades
Mode, therefore, the coaxial switch minimum number of use achieve technical progress, with better function,
So as to reach the self-alignment effect of radio frequency matrix switch；In addition, user can also be in radio frequency matrix switch
The working condition of coaxial switch is monitored in real time, can pointedly investigate failure, facilitates user to safeguard.
Brief description of the drawings
Fig. 1 is in the prior art using the method schematic diagram of power splitter test RRU up-links；
Fig. 2 is in the prior art using the method schematic diagram of combiner test RRU downlinks；
Fig. 3 is in the prior art using radio frequency matrix switch test RRU method schematic diagram；
Fig. 4 is coaxial switch Topology connection mode inside 2 × 12 port complete matrix RF switches in the prior art
Schematic diagram；
Fig. 5 is the self calibration implementation method schematic flow sheet of embodiment of the present invention radio frequency matrix switch；
Fig. 6 is coaxial switch Topology connection mode inside the port radio frequency matrix switch of the embodiment of the present invention 2 × 12
Schematic diagram；
Fig. 7 is the composition structural representation of embodiment of the present invention coaxial switch drive circuit；
Fig. 8 is embodiment of the present invention self calibration radio-frequency transmissions link design schematic diagram；
Fig. 9 is embodiment of the present invention self calibration radio frequency reception link design schematic diagram；
Figure 10 is embodiment of the present invention radio frequency matrix switch self calibration idiographic flow schematic diagram；
Figure 11 is embodiment of the present invention radio frequency matrix switch self calibration wiring schematic diagram one；
Figure 12 is embodiment of the present invention radio frequency matrix switch self calibration wiring schematic diagram two；
Figure 13 realizes the composition structural representation of device for the self calibration of embodiment of the present invention radio frequency matrix switch.
Embodiment
The characteristics of in order to more fully hereinafter understand the embodiment of the present invention and technology contents, below in conjunction with the accompanying drawings
Realization to the embodiment of the present invention is described in detail, appended accompanying drawing purposes of discussion only for reference, is not used for
Limit the present invention.
As shown in figure 5, the self calibration of radio frequency matrix switch realizes that flow includes following step in the embodiment of the present invention
Suddenly：
Step 501：Obtain the radiofrequency signal of PLL outputs；
Here, the reference clock during PLL work can be 10MHz clock signals, the radio frequency of output
The frequency range of signal is 100MHz~3.5GHz.
Here, the radio frequency matrix switch includes 14 coaxial switches；14 coaxial switches include 12
Individual 1 point of 2 switch and 21 point 12 switch (being represented respectively with 1 × 2 and 1 × 12), constitute two-stage cascade
Mode.Coaxial switch Topology connection side inside 2 × 12 port radio frequency matrix switches of embodiment of the present invention design
Formula is as shown in Figure 6.
Wherein, transmission of the COM port of two 1 × 12 coaxial switches respectively as radio frequency matrix switch
(Transmission) port and reflection (Reflection) port, in actual use, Transmission
Port and Reflection ports are coupled with frequency spectrograph and signal as signal output port and input port
On the radio frequency mouthful in source.1~12 port of 1 × 12 switch that numbering is a is coupled with 12 1 × 2 switches
J1 ports on, numbering be b 1 × 12 switch 1~12 port be coupled with 12 1 × 2 switch
On J2 ports, port 1~port of the com port switched for 12 1 × 2 respectively as radio frequency matrix switch
12, connect each radio frequency mouthful of measured piece respectively in actual applications.So, can be by the end of radio frequency matrix switch
Mouthful standing wave and passage Insertion Loss index decomposition meet wireless index on coaxial switches at different levels and RF cable
Design requirement：
Passage Insertion Loss≤2dB@4GHz；
The@4GHz of port standing wave≤1.3；
Channel isolation >=100dB@4GHz.
Also, all RF cables can be also designed as it is isometric, to ensure each passage of radio frequency matrix switch
Phase difference is consistent, for example, embodiment of the present invention design all channel phases in 4GHz band limits
Difference is less than 15 °, and the coaxial switch Topology connection of which can realize complete matrix RF switch function, complete
Full up sufficient wireless product RRU and its unit test demand, and the coaxial switch minimum number used.
Here, methods described also includes：A register address is distributed to each coaxial switch, according to institute
The switching times of the change of the register address values of distribution, in real time record correspondence coaxial switch.
Here, the every of the coaxial switch includes drive circuit all the way；Methods described also includes：It is described to drive
Dynamic circuit assists the coaxial switch to realize for the voltage and current needed for the coaxial switch offer work
The disconnection of passage and closure.
In the embodiment of the present invention, the composition structure of coaxial switch drive circuit is as shown in fig. 7, using NPN tri-
The mode of the MOSFET pipes combination of pole pipe and P-channel enhancement type.Wherein, when NPN triode base stage has
Electric current iBBy when, NPN triode conducting, pass through base current iBSize can control triode operation
In saturation region, at this moment the pressure drop very little between collector and emitter, so, is managed in P-channel MOSFET
Grid G ate and source S ource between can just form negative voltage difference, the conducting of MOSFET pipes,
MOSFET pipe drain Ds rain exports positive voltage, and provides the electric current needed for load, correspondence coaxial switch
Certain is turned on all the way.
Here, the CPU (CPU, Central Processing Unit) of radio frequency matrix switch can be right
Each coaxial switch distributes a register address, and 14 register address, each register are distributed altogether
Value be 16bit bit wides, each correspondence this coaxial switch all the way.When write-in register value is 0x01 (ten
Senary) when, the NPN triode conducting of the register value correspondence first via, the i.e. first via of coaxial switch
Conducting.Similarly, when it is 0x04 to write register value, the 4th tunnel conducting of correspondence coaxial switch.Need spy
Not it is noted that coaxial switch register address write-in register value correspondence binary number can not have two or
More than two are simultaneously 1, and operating system otherwise can be influenceed to make correct decoding to the value of write-in, write because working as
The register value entered has two or more than two while when being 1, the value is invalid.In addition, selected P ditches
The source electrode of road MOSFET pipes will meet load to maximum voltage difference between drain electrode and drain electrode maximum output current
Condition of work, accordingly, it would be desirable to the model of Rational choice P-channel MOSFET pipes.
Here, the bleeder circuit of resistance R3 and the R4 composition in the coaxial switch drive circuit should ensure that
During triode ON, voltage difference V is formed between the grid and source electrode of P-channel MOSFET pipesgs, this VgsValue should
Meet the requirement of MOSFET pipes conducting.Wherein, electric capacity C1 effect is the conducting for delaying MOSFET pipes
Time, to avoid when printed circuit board (PCB, Printed circuit board) cabling is designed, because of parasitism
Inductance is excessive and causes MOSFET pipes in conducting moment drain electrode output negative voltage.Posted inside CPU by being write
The mode of storage can provide needed for coaxial switch drive circuit transistor-transistor logic (TTL,
Transistor-transistor logic) level.
Step 502：The power of the radiofrequency signal of the output is detected, and reads the radio frequency of radio frequency matrix switch
The RSSI value detected in receiving channel；
Step 503：RSSI value on each passage detected is compared with a reference value of corresponding frequency,
When the absolute value of both differences is less than default first threshold, determine that respective channel has been completed under current frequency
Self calibration.
Here, a reference value of the correspondence frequency is standard value specified in specification protocol；The first threshold
It can be set according to the loss of RF cable and the passage Insertion Loss of radio frequency matrix switch；Due to RF cable
Loss is less than 1dB, and all passage Insertion Loss of radio frequency matrix switch are less than 2dB under normal circumstances, therefore,
The RSSI value and the difference of a reference value of corresponding frequency, i.e. RSSIi-RSSI0 (i on each passage detected
>=1 and less than or equal to total number of channels) span should be less than 3dB.
The self-calibration process of embodiment of the present invention radio frequency matrix switch is further detailed below：
Radio frequency matrix switch self calibration unit is implemented using the framework shown in Fig. 8 and Fig. 9, wherein, radio frequency square
Battle array switch self calibration unit includes radio-frequency transmissions link portions and radio frequency reception link portions, transmitting chain constant temperature
Crystal oscillator (OCXO, Oven Controlled Crystal Oscillator) exports 10MHz clock signals,
Reference when being worked as the PLL of band voltage controlled oscillator (VCO, Voltage-controlled oscillator)
Clock.Wherein, the radiofrequency signal of the exportable 100MHz~3.5GHz frequencies of PLL, power maximum can be arrived
10dBm, its phase noise and limitation of high harmonics for exporting radiofrequency signal are satisfied by requirement, 3dB π nets
Adjust the matching of transmitting chain output end.In addition, radiofrequency signal is converted into electricity by receives link power detection device
Signal is pressed, voltage signal is converted to data signal by modulus (AD) switching device.
As shown in Figure 10, its detailed implementation is as follows for radio frequency matrix switch self calibration flow：
Step 1001：User selects self-calibration routines on the touchscreen, and inputs the passage to be calibrated, leads
Lead to the passage；
Such as：Transmission to PORT1 passages, at this moment, the Transmission of radio frequency matrix switch
Port is to PORT1 channel conductives；
Step 1002：Radio frequency transmitting channel and receiving channel are connected using RF cable a；
Here, as shown in figure 11, PLL configuration parameters are given by processor, it is exported 100MHz to 3.5GHz
The tone signal of frequency range, power is -10dBm.The radiofrequency signal of receiving channel power detection device detection input,
And the radiofrequency signal of input is converted into voltage signal, the output digit signals after analog-to-digital conversion, processor
This data signal is read by Serial Peripheral Interface (SPI) (SPI, Serial Peripheral Interface), so,
Power detection chip can be calibrated in 100MHz to 3.5GHz band limits, and carry out curve
It is fitted and writes table checking, it is ensured that the signal power and the power one of actual transmission signal detected in this frequency range
Cause.
Step 1003：Utilize RF cable b connection radio frequency matrix switch passages, it is ensured that have radiofrequency signal access；
Here, by RF cable a radio frequency reception channels, this one end is backed out, and is connected to the PORT1 of radio frequency matrix switch
Port, while another RF cable b two ends to be coupled with to the Transmission of radio frequency matrix switch
Port and radio frequency reception RX passages, so, radio frequency reception channel has radiofrequency signal input, as shown in figure 12.
Step 1004：In the frequency to be calibrated, detection is calibrated the RSSI value of passage, and with it is corresponding frequently
The a reference value of point is compared, and judges whether calibration value is normal；
Step 1005：The connected mode of RF cable is changed, other passages are calibrated successively.
Specifically, user inputs the frequency to be calibrated (or a certain band limits) on the touchscreen, reads
Receiving channel power RSSI1 values, and be compared with a reference value RSSI0 of corresponding frequency, if
RSSI1-RSSI0 is less than 3dB, that is, completes radio frequency matrix switch Transmission ports to PORT1 ends
Self calibration of the mouth under current frequency.Similarly, self calibration can be carried out to other passages successively, when all passages
RSSIi-RSSI0 (i >=1 and less than or equal to total number of channels) when being both less than the first threshold, then show to penetrate
Frequency matrix switch self calibration passes through.
After the self calibration of each passage is completed, the switched mode power converter of radio frequency self calibration link is gone
Enable, so, each device of radio frequency matrix switch self calibration unit does not work, to save system and device
Power consumption, and prevent that clock higher hamonic wave from producing interference to other circuits.
In actual applications, radio frequency matrix switch is set by gigabit network interface (Gigabit Ethernet) and outside
Standby communication, when in applied to automatic test platform, background test software is given according to practical application request
Radio frequency matrix switch sendaisle switching command, CPU is connected to after order, by command decoder, is parsed and is wanted
The register address of processing, writes binary one by the corresponding a certain position of appropriate address respectively, CPU correlations
Universal input/output (GPIO, General Purpose Input/Output) mouth exports TTL high level, this
It is directly perceived on its correspondence MOSFET tube drive circuit output positive voltage of sample, coaxial radio-frequency switch conduction, display screen
The a certain paths conducting of display correspondence.
Here, a register address can also be distributed to each coaxial switch in memory in advance, its
Initial value is 0, and once, correspondence register value adds 1, so can be real-time for one of coaxial switch switching
The switching times of all coaxial switches are recorded, to closing on or being provided alert more than the coaxial switch in life-span, side
Just user safeguards.User can also intuitively check the switching of each coaxial switch currently by touch display screen
Number of times.
Closed on or more than the life-span here it is possible to calculate coaxial switch on the basis of unit hour, and then to closing on
Or provided alert more than the coaxial switch in life-span.
To realize the above method, the self calibration that the embodiment of the present invention additionally provides a kind of radio frequency matrix switch is realized
Device, as shown in figure 13, the device include acquisition module 130, detection read module 131, self calibration and sentenced
Disconnected module 132；Wherein,
Acquisition module 130, the radiofrequency signal for obtaining PLL outputs；
Read module 131, the power of the radiofrequency signal for detecting the output are detected, and reads radio frequency square
The RSSI value detected in the radio frequency reception channel of battle array switch；
Self calibration judge module 132, for by the RSSI value on each passage detected and corresponding frequency
A reference value is compared, and when the absolute value of both differences is less than default first threshold, determines respective channel
Complete the self calibration under current frequency.
Here, the radio frequency matrix switch includes 14 coaxial switches；14 coaxial switches include 12
Individual 1 point of 2 switch and 21 point 12 switch, constitute two-stage cascade mode.
Reference clock during the PLL work is 10MHz clock signals, the frequency of the radiofrequency signal of output
Scope is 100MHz~3.5GHz；The general loss and radio frequency according to RF cable of the first threshold
The passage Insertion Loss of matrix switch is set, and can be 3dB.
Wherein, described device also includes：Coaxial switch switches logging modle 133, for coaxial to each
Switch one register address of distribution, according to the change of the register address values distributed, record is corresponding in real time
The switching times of coaxial switch；
Coaxial switch drive module 134, for drive the coaxial switch per all the way, it is described same to provide
Voltage and current needed for axle switch, and assist the coaxial switch to realize disconnection and the closure of passage.
In actual applications, the acquisition module 130, detection read module 131, self calibration judge module
132nd, coaxial switch switching logging modle 133, coaxial switch drive module 134 can be by positioned at testers
On CPU, microprocessor (MPU, Micro Processor Unit), digital signal processor (DSP,
Digital Signal Processor) or field programmable gate array (FPGA, Field Programmable Gate
) etc. Array realize.
The embodiment of the present invention obtains the radiofrequency signal of PLL outputs, detects the power of the radiofrequency signal of output, and
The RSSI value detected in the radio frequency reception channel for reading radio frequency matrix switch, by each passage detected
On RSSI value be compared with a reference value of corresponding frequency, the absolute value of both differences is less than default the
During one threshold value, determine that respective channel has completed the self calibration under current frequency.Thus, can not only realize
Can self calibration, the intelligent radio frequency matrix switch of easy care, also solve existing 12 port radio frequency matrix switch
Middle coaxial switch quantity is more, high cost, calibration and maintenance process it is cumbersome, and the problem of unitary function.
Further, the radio frequency matrix switch of the embodiment of the present invention is using 14 coaxial switch composition two-stage cascades
Mode, therefore, the coaxial switch minimum number of use achieve technical progress, with better function,
So as to reach the self-alignment effect of radio frequency matrix switch；In addition, user can also be in radio frequency matrix switch
The working condition of coaxial switch is monitored in real time, can pointedly investigate failure, facilitates user to safeguard.
The above, only presently preferred embodiments of the present invention is not intended to limit the protection model of the present invention
Enclose, any modification, equivalent and improvement for being made within the spirit and principles of the invention etc. all should
Within protection scope of the present invention.
Claims (11)
1. a kind of self calibration implementation method of radio frequency matrix switch, it is characterised in that methods described includes：
Obtain the radiofrequency signal of RF Phase-Lock Loop PLL outputs；
The power of the radiofrequency signal of the output is detected, and is read in the radio frequency reception channel of radio frequency matrix switch
The received signal strength indicator RSSI value detected；
RSSI value on each passage detected is compared with a reference value of corresponding frequency, both are poor
When the absolute value of value is less than default first threshold, determine that respective channel has completed the self-correcting under current frequency
It is accurate.
2. according to the method described in claim 1, it is characterised in that the radio frequency matrix switch includes 14
Individual coaxial switch；14 coaxial switches include 12 1 point 2 switch and 21 point 12 switch, group
Into two-stage cascade mode.
3. method according to claim 2, it is characterised in that methods described also includes：To each
Coaxial switch distributes a register address, according to the change of the register address values distributed, in real time record
The switching times of correspondence coaxial switch.
4. method according to claim 2, it is characterised in that the every of the coaxial switch wraps all the way
Include drive circuit；
Methods described also includes：The drive circuit is the voltage and electricity needed for the coaxial switch offer work
Stream, and assist the coaxial switch to realize disconnection and the closure of passage.
5. the method according to any one of Claims 1-4, it is characterised in that the PLL work
When reference clock be 10MHz clock signals, the frequency range of the radiofrequency signal of output be 100MHz~
3.5GHz；
The first threshold is set according to the loss of RF cable and the passage Insertion Loss of the radio frequency matrix switch
Put.
6. a kind of self calibration of radio frequency matrix switch realizes device, it is characterised in that described device includes：
Acquisition module, the radiofrequency signal for obtaining RF Phase-Lock Loop PLL outputs；
Read module, the power of the radiofrequency signal for detecting the output are detected, and reads radio frequency matrix and is opened
The received signal strength indicator RSSI value detected in the radio frequency reception channel of pass；
Self calibration judge module, for by base of the RSSI value on each passage detected with corresponding frequency
Quasi- value is compared, and when the absolute value of both differences is less than default first threshold, determines that respective channel is complete
Into the self calibration under current frequency.
7. device according to claim 6, it is characterised in that the radio frequency matrix switch includes 14
Individual coaxial switch；14 coaxial switches include 12 1 point 2 switch and 21 point 12 switch, group
Into two-stage cascade mode.
8. device according to claim 7, it is characterised in that described device also includes：Coaxial switch
Switch logging modle, for distributing a register address to each coaxial switch, according to posting for being distributed
The switching times of the change of storage address value, in real time record correspondence coaxial switch.
9. device according to claim 7, it is characterised in that described device also includes：Coaxial switch
Drive module, for drive the coaxial switch per all the way, to provide needed for the coaxial switch work
Voltage and current, and assist the coaxial switch to realize disconnection and the closure of passage.
10. the device according to any one of claim 6 to 9, it is characterised in that the PLL work
When reference clock be 10MHz clock signals, the frequency range of the radiofrequency signal of output be 100MHz~
3.5GHz；
The first threshold is set according to the loss of RF cable and the passage Insertion Loss of the radio frequency matrix switch
Put.
11. a kind of self-alignment radio frequency matrix switch, it is characterised in that the radio frequency matrix switch includes power
Profit requires that the self calibration of the radio frequency matrix switch described in 6 to 10 any one realizes device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004170.6A CN106941382B (en) | 2016-01-04 | 2016-01-04 | Self-calibration implementation method and device of radio frequency matrix switch |
| PCT/CN2016/111116 WO2017118279A1 (en) | 2016-01-04 | 2016-12-20 | Self-calibration implementation method and device for radio frequency matrix switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004170.6A CN106941382B (en) | 2016-01-04 | 2016-01-04 | Self-calibration implementation method and device of radio frequency matrix switch |
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|---|---|
| CN106941382A true CN106941382A (en) | 2017-07-11 |
| CN106941382B CN106941382B (en) | 2020-04-28 |
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| CN201610004170.6A Active CN106941382B (en) | 2016-01-04 | 2016-01-04 | Self-calibration implementation method and device of radio frequency matrix switch |
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| WO (1) | WO2017118279A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108319562A (en) * | 2017-12-26 | 2018-07-24 | 北京航天测控技术有限公司 | High-precision broadband millimeter-wave 8x8 matrix switches and microwave parameters assess calibration method |
| CN108519751A (en) * | 2018-04-02 | 2018-09-11 | 南京国睿安泰信科技股份有限公司 | A kind of novel solid matrix switching system |
| CN109245837A (en) * | 2018-11-14 | 2019-01-18 | 众格智能科技（上海）有限公司 | A kind of parallel self-calibration system of internet-of-things terminal radio frequency reception |
| CN110958062A (en) * | 2018-11-30 | 2020-04-03 | 南京长峰航天电子科技有限公司 | Radio frequency multichannel calibration system and method |
| CN114665913A (en) * | 2022-05-20 | 2022-06-24 | 南京派格测控科技有限公司 | Isolation degree optimization method and system for solid-state matrix switch and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108319562A (en) * | 2017-12-26 | 2018-07-24 | 北京航天测控技术有限公司 | High-precision broadband millimeter-wave 8x8 matrix switches and microwave parameters assess calibration method |
| CN108319562B (en) * | 2017-12-26 | 2020-09-08 | 北京航天测控技术有限公司 | High-precision broadband millimeter wave 8x8 matrix switch and microwave parameter evaluation and calibration method |
| CN108519751A (en) * | 2018-04-02 | 2018-09-11 | 南京国睿安泰信科技股份有限公司 | A kind of novel solid matrix switching system |
| CN109245837A (en) * | 2018-11-14 | 2019-01-18 | 众格智能科技（上海）有限公司 | A kind of parallel self-calibration system of internet-of-things terminal radio frequency reception |
| CN110958062A (en) * | 2018-11-30 | 2020-04-03 | 南京长峰航天电子科技有限公司 | Radio frequency multichannel calibration system and method |
| CN110958062B (en) * | 2018-11-30 | 2022-05-03 | 南京长峰航天电子科技有限公司 | Radio frequency multichannel calibration system and method |
| CN114665913A (en) * | 2022-05-20 | 2022-06-24 | 南京派格测控科技有限公司 | Isolation degree optimization method and system for solid-state matrix switch and electronic equipment |
Also Published As
| Publication number | Publication date |
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| CN106941382B (en) | 2020-04-28 |
| WO2017118279A1 (en) | 2017-07-13 |
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