CN108390736A - Programmable channel signal amplitude adjusted simulator and the method for adjusting analog channel signal amplitude - Google Patents
Programmable channel signal amplitude adjusted simulator and the method for adjusting analog channel signal amplitude Download PDFInfo
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- CN108390736A CN108390736A CN201810109037.6A CN201810109037A CN108390736A CN 108390736 A CN108390736 A CN 108390736A CN 201810109037 A CN201810109037 A CN 201810109037A CN 108390736 A CN108390736 A CN 108390736A
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- channel signal
- attenuation
- adjustable damping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3911—Fading models or fading generators
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention discloses a kind of programmable channel signal amplitude adjusted simulator and the methods for adjusting analog channel signal amplitude, and the simulator includes data storage cell, D/A conversion unit, adjustable damping unit and control unit；The output signal of control unit connects the controlled end into adjustable damping unit through D/A conversion unit；The radiofrequency signal of the input termination input channel of adjustable damping unit, output end are the analog signal after adjusting, and the signal voltage value V of adjustable damping unit controlled end inputs the fading depth Attenuation of the radiofrequency signal of termination input channel with it and corresponds；The present invention is small, easy to carry, have the function of that microwave signal continuous amplitude adjustment, the method make simulator that can carry out space propagation scenario simulation in laboratory, and adjustment process does not generate interruptions, and can realize that programmable quick adjusting is simulated；And it is at low cost, easy to use, convenient for the state simulation of channel variation in coverage test scene.
Description
Technical field
The present invention relates to a kind of programmable channel signal amplitude adjusted simulator and adjust analog channel signal amplitude
Method belongs to signal amplitude modulation field.
Background technology
In actual use, the signal amplitude of space propagation can be by inside even from weather such as rainfalls, together for communication relay base station
When may also by the temporary influence of mobile shelter, develop with networking measuring phases, need to carry out field using simulation test
Scape is simulated.Traditional measurement method mostly uses the high microwave dark room scheme of cost, is limited in cost and convenience, Wu Faman
The growing Communications Market Automatic survey demand of foot.The signal amplitude adjuster on domestic and international market can not be complete at present
Whole state simulations of channel variation in coverage test scene.And in the market inexpensive adjustable attenuator mostly use it is mechanical or
Simple digital step-by-step movement, the former cannot achieve programmable quickly adjust and simulates, and the latter generates in stepping gear switch in signal
It is disconnected, it can not coverage test scene demand.Therefore, how to realize that programmable channel signal amplitude adjusts analogy method so that mould
Quasi- device can carry out space propagation scenario simulation in laboratory, have become the key method of a research and development.
Invention content
It is easy to carry, have microwave signal continuous technical problem to be solved by the invention is to provide a kind of small
The method that amplitude adjusts the programmable channel signal amplitude adjusted simulator of function and adjusts analog channel signal amplitude, and
Adjustment process does not generate interruption.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of programmable channel signal amplitude adjusts simulator comprising data storage cell, D/A conversion unit, adjustable
Attenuation units and control unit for controlling D/A conversion unit voltage output；The output signal of described control unit is through digital-to-analogue
Converting unit connects the controlled end into adjustable damping unit；The radio frequency letter of the input termination input channel of the adjustable damping unit
Number, output end is the analog signal after adjusting, and the signal voltage value V of the adjustable damping unit controlled end inputs termination with it
The fading depth Attenuation of the radiofrequency signal of input channel is corresponded, i.e. Attenuation=F (V)；
The data storage cell is connected with control unit；The data storage cell is for storing user according to institute's mould
The operation code that near-ring border scene change is write.
Further, it is built based on HMC712LP3C variable voltage attenuator chips inside the adjustable damping unit
Microstrip circuit is connect by coaxial connector with input/output port.
Further, the adjustable damping unit is equipped with HMC712LP3C variable voltage attenuator chip, blocking in it
Circuit, filter circuit and connector etc..It is encapsulated using individual screen metal-back outside the adjustable damping unit.Further,
The invention also includes the ethernet communication unit for being connected to control unit on Ethernet, the ethernet communication unit and
Control unit interconnects.
Further, the ethernet communication unit includes Ethernet chip.
Further, described control unit does main control chip using interconnection type microcontroller STM32F107.
Further, the D/A conversion unit uses the analog-digital chip of model AD5732.
Further, the data storage cell stores user according to being simulated by FLASH storage chips therein
Parameter amount set by environmental change scene.
A method of analog channel signal amplitude is adjusted, following steps are specifically used：
Step 1: building the hardware system for adjusting analog channel signal amplitude：
The output signal of control unit is connected into the controlled end into adjustable damping unit through D/A conversion unit, it is described adjustable
The radiofrequency signal of the input termination input channel of attenuation units, output end is the analog signal after adjusting；
Step 2: by sending instructions into control unit under ethernet communication unit, according to the target fading depth of setting
Attenuation first obtains reducing the target fading depth Attenuation1 after 10 times, then obtained by look-up table and its
Corresponding voltage value recycles following formula (1) to obtain slope k：
/ 10 (1) k=(Attenuation1 [i]-Attenuation1 [i+1])
Wherein i=Attenuation/10；
The calculation formula such as following formula (2) of the corresponding voltage V of target fading depth Attenuation then set：
V=Attenuation1 [i]-(Attenuation-i*10) * k (2)
It improves efficiency of tabling look-up.
Step 3: the digital voltage for the target fading depth tabled look-up is on the basis of current state, according to setting
Die-away time T target fading depth Attenuation is tapered in a manner of stepping Step；Wherein, target decaying is deep
Degree Attenuation and die-away time T can be set according to user's actual need；
Step 4: the corresponding digital voltages of target fading depth Attenuation are defeated voltage by D/A conversion unit
Enter to adjustable damping unit.
Further, the stepping Step sizes and the die-away time T size of setting are inversely proportional.
Further, the dbjective state Attenuation1 and die-away time T can be sent by specified command forms,
Or start by sign on to execute order one by one after the hardware system can be allowed first to store a plurality of order.
Beneficial effects of the present invention are as follows：
It may be implemented to continuously adjust microwave channel signal amplitude using programmable channel signal amplitude adjusted simulator
Or definite value setting, in adjustment process, signal does not interrupt；It is capable of the signal amplitude of accurate simulation space propagation by rainfall etc.
The experiment scene of inside even from weather and temporary influence by mobile shelter；There is provided programmable control function, support with
Too net remote control can be embedded in automatization test system and realize that remote automation measures.
Compared with other signal amplitude adjusters, effect is as shown in the table：
The method of this adjusting analog channel signal amplitude makes simulator that can carry out space propagation scene mould in laboratory
Quasi-, adjustment process does not generate interruption, and can realize that programmable quickly adjust is simulated；This method is at low cost, easy to use, can
Meet growing Communications Market Automatic survey demand, convenient for the state simulation of channel variation in coverage test scene.
Description of the drawings
Fig. 1 is that the signal of the present invention flows to schematic diagram.
Fig. 2 is the status diagram that channel signal amplitude decays at any time when really being had an impact to channel signal.Fig. 3
The status diagram that channel signal amplitude decays at any time when being had an impact to channel signal to simulate in the lab.
Wherein, 1 ethernet communication unit, 2 control units, 3 data storage cells, 4 D/A conversion units, 5 adjustable dampings
Unit.
The abscissa of Fig. 2 and Fig. 3 indicates that time quantum, ordinate indicate channel signal amplitude.
Specific implementation mode
With reference to Fig. 1-Fig. 3 and specific embodiment, the present invention will be further described.
As shown in Figure 1-Figure 3, the present embodiment is related to a kind of programmable channel used in communication relay base station measurement letter
Number amplitude adjusted simulator, and in particular to a kind of programmable channel signal amplitude adjusts simulator comprising data storage cell
3, D/A conversion unit 4, adjustable damping unit 5 and the control unit 2 for controlling 4 voltage output of D/A conversion unit；It is described
The output signal of control unit 2 connects the controlled end into adjustable damping unit 5 through D/A conversion unit 4；The adjustable damping list
The radiofrequency signal of the input termination input channel of member 5, output end is the analog signal after adjusting, the adjustable damping unit 5
The fading depth Attenuation mono- that signal voltage value V and its of controlled end input the radiofrequency signal of termination input channel is a pair of
It answers, i.e. Attenuation=F (V)；
The data storage cell 4 is connected with control unit 2；The data storage cell 4 for store user according to
The operation code that institute's simulated environment scene change is write.
Further, 5 inside of the adjustable damping unit is to be built based on HMC712LP3C variable voltage attenuator chips
Microstrip circuit, connect with input/output port by coaxial connector.
Further, the adjustable damping unit 5 is equipped with HMC712LP3C variable voltage attenuator chip, blocking in it
Circuit, filter circuit and connector etc..5 outside of the adjustable damping unit is encapsulated using individual screen metal-back.
Further, the present embodiment further includes the ethernet communication unit for being connected to control unit 2 on Ethernet
1, the ethernet communication unit 1 and control unit 2 interconnect.
Further, the ethernet communication unit 1 includes Ethernet chip.
Further, described control unit 2 does main control chip using interconnection type microcontroller STM32F107.
Further, the D/A conversion unit 4 uses the analog-digital chip of model AD5732.
Further, the data storage cell 3 stores user according to being simulated by FLASH storage chips therein
Parameter amount set by environmental change scene.
A method of analog channel signal amplitude is adjusted, following steps are specifically used：
Step 1: building the hardware system for adjusting analog channel signal amplitude：
The output signal of control unit 2 is connected into the controlled end into adjustable damping unit 5 through D/A conversion unit 4, it is described
The radiofrequency signal of the input termination input channel of adjustable damping unit 5, output end is the analog signal after adjusting；
Step 2: by sending instructions into control unit 2 under ethernet communication unit 1, decayed according to the target of setting deep
Degree Attenuation first obtain reduce 10 times after target fading depth Attenuation1, then by look-up table obtain with
Its corresponding voltage value recycles following formula (1) to obtain slope k：
/ 10 (1) k=(Attenuation1 [i]-Attenuation1 [i+1])
Wherein i=Attenuation/10；
The calculation formula such as following formula (2) of the corresponding voltage V of target fading depth Attenuation then set：
V=Attenuation1 [i]-(Attenuation-i*10) * k (2)
It improves efficiency of tabling look-up.
Step 3: the digital voltage for the target fading depth tabled look-up is on the basis of current state, according to setting
Die-away time T target fading depth Attenuation is tapered in a manner of stepping Step；Wherein, target decaying is deep
Degree Attenuation and die-away time T can be set according to user's actual need；
Step 4: the corresponding digital voltages of target fading depth Attenuation are defeated voltage by D/A conversion unit 4
Enter to adjustable damping unit 5.
Further, the stepping Step sizes and the die-away time T size of setting are inversely proportional.
Further, the dbjective state Attenuation1 and die-away time T can be sent by specified command forms,
Or start by sign on to execute order one by one after the hardware system can be allowed first to store a plurality of order.
The programmable channel signal amplitude adjusted simulator of the present embodiment is specifically included such as lower unit：
Ethernet communication unit 1 is interconnected by 100 m ethernet chip and control unit, connects devices to Ethernet
On, for realizing embedded user's automatization test system, realize that remote automation measures；
Control unit 2 does main control chip, the life that will be received using the interconnection type microcontroller STM32F107 of ST companies
It enables and carries out data processing, and control the voltage output of D/A conversion unit with the communication mode of SPI；
Data storage cell 3 stores the operation generation that user writes according to institute's simulated environment scene change by FLASH chip
Code；
D/A conversion unit 4 is transmitted control unit serial ports using the analog-digital chip AD5732 of ADI companies
Digital signal is converted to analog signal output；The chip output voltage range is adjustable, according to the control of adjustable damping unit when use
Demand processed carries out it initial configuration, and the control voltage range of adjustable damping unit used in the present invention is 0~-3V, institute
To need to configure its output voltage as -5V~+5V；Chip voltage during output adjustment is continuous, it is possible to be kept away
Exempt from signal output to interrupt, influences to test；
Adjustable damping unit 5, to the voltage of the fading depth Attenuation and its control port of input channel signal
There are one-to-one relationship Attenuation=F (V) by value V, can reach control by adjusting the voltage value V of its control port
The effect of channel output signal amplitude processed；Fading depth Attenuation refers to carries out analog regulation (decaying) to signal amplitude
Amplitude, i.e. amplitude adjustment amount.
Programmable channel signal amplitude adjusted simulator, operation principle described in the present embodiment are as described below：
By adjustable damping unit to the fading depth Attenuation of channel signal in STM32 microcontroller internal processes
It is depicted to come in a manner of algorithm with the one-to-one relationship Attenuation=F (V) of the voltage value V of its control port, then
With one fading depth Attenuation of algorithm description from current state Attenuation0 in die-away time T with stepping
Mode (stepping Step sizes and the die-away time T size of setting are inversely proportional) tapers to dbjective state Attenuation1's
Function Attenuation=Y (Attenuation1, T)；User can be by specifying the next target-like of command forms sending device
State Attenuation1 and die-away time T also allows for equipment and first stores to start one one by sign on after a plurality of order
The execution order of item.
User can be according to the influence pass to the signal amplitude of space propagation such as the weather conditions such as rainfall or mobile shelter
System establishes the model that a space propagation signal amplitude decays at any time, and it is real then to carry out simulation according to the specified order of model transmission
It tests；For example, due to some movement shelter to transmission signal have an impact, make signal with the rate of decay of -0.5dB/s from -
5dB is decayed to again with the velocity variations of 0.5dB/s to -5dB after -6dB, as shown in Fig. 2, user only needs to connect equipment when simulation
Connect and be adjusted to initial -5dB attenuation states, then according to specific instruction type send first aim state -6dB and
Die-away time 2.0s, equipment retransmit second target state -5dB and die-away time 2.0s after the completion and can accurately test
Influence of this environmental change to communication equipment is simulated in room, as shown in figure 3, greatly enhancing communication R＆D work personnel
Working efficiency.
Above-mentioned detailed description is illustrating for possible embodiments of the present invention, which is not to limit this hair
Bright the scope of the claims, all equivalence enforcements or change without departing from the present invention are intended to be limited solely by the scope of patent protection of this case.
Claims (10)
1. a kind of programmable channel signal amplitude adjusted simulator, it is characterised in that：It includes data storage cell（3）, number
Mould converting unit（4）, adjustable damping unit（5）With for controlling D/A conversion unit（4）The control unit of voltage output（2）；
Described control unit（2）Output signal through D/A conversion unit（4）It connects into adjustable damping unit（5）Controlled end；It is described
Adjustable damping unit（5）Input termination input channel radiofrequency signal, output end be amplitude adjusted after analog signal, institute
State adjustable damping unit（5）Signal voltage value V and its of controlled end input the fading depth of the radiofrequency signal of termination input channel
Attenuation is corresponded, i.e. Attenuation=F (V)；
The data storage cell（4）And control unit（2）It is connected；The data storage cell（4）For storing user's root
The operation code write according to institute's simulated environment scene change.
2. programmable channel signal amplitude adjusted simulator according to claim 1, it is characterised in that：It is described adjustable to decline
Subtract unit（5）Inside is the microstrip circuit built based on HMC712LP3C variable voltage attenuator chips, passes through coaxial connector
It is connect with input/output port.
3. programmable channel signal amplitude adjusted simulator according to claim 1 or 2, it is characterised in that：It is also wrapped
It includes for by control unit（2）The ethernet communication unit being connected on Ethernet（1）, the ethernet communication unit（1）With
Control unit（2）Interconnection.
4. programmable channel signal amplitude adjusted simulator according to claim 3, it is characterised in that：The Ethernet
Communication unit（1）Including Ethernet chip.
5. programmable channel signal amplitude adjusted simulator according to claim 1 or 2, it is characterised in that：The control
Unit processed（2）Main control chip is done using interconnection type microcontroller STM32F107.
6. programmable channel signal amplitude adjusted simulator according to claim 1 or 2, it is characterised in that：The number
Mould converting unit（4）Using the analog-digital chip of model AD5732.
7. programmable channel signal amplitude adjusted simulator according to claim 1 or 2, it is characterised in that：The number
According to storage unit（3）User is stored according to set by institute's simulated environment scene change by FLASH storage chips therein
Parameter amount.
8. a kind of method adjusting analog channel signal amplitude, it is characterised in that：It uses following steps：
Step 1: building the hardware system for adjusting analog channel signal amplitude：
By control unit（2）Output signal through D/A conversion unit（4）It connects into adjustable damping unit（5）Controlled end, institute
State adjustable damping unit（5）Input termination input channel radiofrequency signal, output end be adjusting after analog signal；
Step 2: passing through ethernet communication unit（1）Under send instructions to control unit（2）In, decayed according to the target of setting deep
Degree Attenuation first obtain reduce 10 times after target fading depth Attenuation1, then by look-up table obtain with
Its corresponding voltage value recycles following formula（1）Obtain slope k：
k= (Attenuation1[i]- Attenuation1[i+1])/10 （1）
Wherein i=Attenuation/10；
The calculation formula such as following formula of the corresponding voltage V of target fading depth Attenuation then set（2）：
V=Attenuation1[i]-( Attenuation-i*10)*k （2）
Step 3: the digital voltage for the target fading depth tabled look-up is on the basis of current state, according to declining for setting
Subtract time T and tapers to target fading depth Attenuation in a manner of stepping Step；Wherein, target fading depth
Attenuation and die-away time T can be set according to user's actual need；
Step 4: the corresponding digital voltages of target fading depth Attenuation pass through D/A conversion unit（4）Control source
To adjustable damping unit（5）.
9. the method according to claim 8 for adjusting analog channel signal amplitude, it is characterised in that：The stepping Step is big
The small die-away time T size with setting is inversely proportional.
10. the method for adjusting analog channel signal amplitude according to claim 8 or claim 9, it is characterised in that：The target-like
State Attenuation1 and die-away time T can be sent by specified command forms, or that the hardware system can be allowed first to store is more
Start by sign on to execute order one by one after item order.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109037.6A CN108390736A (en) | 2018-02-05 | 2018-02-05 | Programmable channel signal amplitude adjusted simulator and the method for adjusting analog channel signal amplitude |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810109037.6A CN108390736A (en) | 2018-02-05 | 2018-02-05 | Programmable channel signal amplitude adjusted simulator and the method for adjusting analog channel signal amplitude |
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| CN201810109037.6A Pending CN108390736A (en) | 2018-02-05 | 2018-02-05 | Programmable channel signal amplitude adjusted simulator and the method for adjusting analog channel signal amplitude |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111610737A (en) * | 2020-05-21 | 2020-09-01 | 河北时光射频技术有限公司 | System and method for modulating signal amplitude and phase based on digital vector |
| CN114826458A (en) * | 2022-03-08 | 2022-07-29 | 北京中科同舟科技有限公司 | Compensation method and system for signal attenuation in communication |
| CN115290991A (en) * | 2022-10-09 | 2022-11-04 | 荣耀终端有限公司 | Antenna testing method, device and system, channel simulator and readable storage medium |
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| CN104734656A (en) * | 2013-12-24 | 2015-06-24 | 苏州普源精电科技有限公司 | Radio frequency signal source with amplitude modulation and automatic level control functions |
| CN104955081A (en) * | 2015-07-08 | 2015-09-30 | 中国电力科学研究院 | Programmable attenuation system and method for micro-power wireless communication testing |
| CN208063215U (en) * | 2018-02-05 | 2018-11-06 | 河北时光射频技术有限公司 | A kind of programmable channel signal amplitude adjusted simulator |
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| CN104734656A (en) * | 2013-12-24 | 2015-06-24 | 苏州普源精电科技有限公司 | Radio frequency signal source with amplitude modulation and automatic level control functions |
| CN104955081A (en) * | 2015-07-08 | 2015-09-30 | 中国电力科学研究院 | Programmable attenuation system and method for micro-power wireless communication testing |
| CN208063215U (en) * | 2018-02-05 | 2018-11-06 | 河北时光射频技术有限公司 | A kind of programmable channel signal amplitude adjusted simulator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111610737A (en) * | 2020-05-21 | 2020-09-01 | 河北时光射频技术有限公司 | System and method for modulating signal amplitude and phase based on digital vector |
| CN114826458A (en) * | 2022-03-08 | 2022-07-29 | 北京中科同舟科技有限公司 | Compensation method and system for signal attenuation in communication |
| CN114826458B (en) * | 2022-03-08 | 2024-01-26 | 北京中科同舟科技有限公司 | Compensation method and system for signal attenuation in communication |
| CN115290991A (en) * | 2022-10-09 | 2022-11-04 | 荣耀终端有限公司 | Antenna testing method, device and system, channel simulator and readable storage medium |
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