CN103427896B - There is the satellite modem control circuit of man machine interface - Google Patents
There is the satellite modem control circuit of man machine interface Download PDFInfo
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- CN103427896B CN103427896B CN201310338240.8A CN201310338240A CN103427896B CN 103427896 B CN103427896 B CN 103427896B CN 201310338240 A CN201310338240 A CN 201310338240A CN 103427896 B CN103427896 B CN 103427896B
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Abstract
The invention discloses a kind of satellite modem control circuit with man machine interface, including AC DC power module, embedded control chip MCU module, radio frequency and logic circuit FPGA module and human-computer interface module；Described AC DC power module provides power supply for described control circuit, described MCU module receives the signal of described man machine interface, gather parameters, data exchange is carried out by SPI control line and data/address bus with described FPGA module with described FPGA module, monitor the RF index of described FPGA module in real time, and the transmitting power and pad value to described FPGA module compensates calculating.The satellite modem control circuit with man machine interface that the present invention provides achieves the real-time monitoring of the RF index of the radio frequency logical gate circuit to satellite modulation /demodulation, and show with man machine interface, achieve man-machine interaction, facilitate the maintenance of system, maintenance and updating operation.
Description
Technical field
The present invention relates to technical field of data transmission, particularly relate to a kind of satellite modulatedemodulate with man machine interface
Adjust device control circuit.
Background technology
Satellite communication includes space station and earth station's two parts.Space station is based on satellite, and earth station includes
Support user accesses satellite repeater, and realizes all facilities of communication capacity, satellite modulatedemodulate between user
Adjusting device is exactly one of them.As the bridge between user and satellite, satellite modem is extremely important.
The most conventional modem is comtec570, only achieves BPSK in modulation demodulation system,
And QPSK and 16QAM modulation system is still not carried out.It addition, during modem uses,
Need the various functions of satellite modem is monitored in real time, understand the every of satellite modem
Duty, and demonstrated by the external human-computer interface module fact.Current already present satellite modulation /demodulation
Device is in use, it is impossible to carries out Real Data Exchangs with external equipment, debugs band for field personnel
Carry out the biggest difficulty, and system maintenance and software improvement are the most inconvenient.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide one and has man-machine
The control circuit of the satellite modem at interface, to realize monitoring in real time and leading to satellite modem
Cross man machine interface to interact with user.
For achieving the above object, the invention provides a kind of satellite modem with man machine interface and control electricity
Road, including AC-DC power module, embedded control chip MCU module, radio frequency and logic circuit FPGA
Module and human-computer interface module, it is characterised in that described power module input 220V alternating current, export 24V
Unidirectional current, powers to described control circuit, and described MCU module includes digital-to-analogue conversion and AD conversion unit,
Described MCU module connects described human-computer interface module by RS232 serial ports, outside being connected by communication interface
Portion's equipment, is received described human-computer interface module or the monitor command of described external equipment, is turned by described digital-to-analogue
Change and gather supply voltage, electric current, temperature parameter with AD conversion unit, total by SPI control line and data
Line and described FPGA module carry out data exchange, to the transmitting power of described FPGA module, pad value,
Frequency, the bit error rate, receiving sensitivity, Up/Down Conversion state monitor in real time, and by inquiry thermometer,
Frequency meter, in conjunction with the bit error rate, receiving sensitivity parameter, transmitting power and the decay to described FPGA module
Value compensates calculating.
After described MCU module receives described man machine interface signal, by digital-to-analogue conversion and analog digital conversion list
Unit gathers relevant parameter, carries out data exchange with described FPGA module, to the transmitting power of described FPGA,
Pad value, frequency, the bit error rate, receiving sensitivity, Up/Down Conversion state monitor in real time, and by looking into
Ask thermometer, frequency meter, in conjunction with the bit error rate, receiving sensitivity parameter, described FPGA module is sent out
Penetrate power and pad value compensates calculating or small parameter perturbations.
Further, 220V alternating current is converted to 24V by described AC-DC power module, and is divided into 6
Different branch powers to described control circuit.
Further, described embedded control chip MCU module is LPC2468 chip.
Further, described communication interface is serial ports, program burn writing debugging interface or 10/100M network interface.
Further, described control circuit also includes test interface.
Further, described control circuit also includes IIC (IC bus) interface data storage chip,
For ephemeral data buffering, store and pre-read.
Further, described control circuit also includes output interface, including serial ports, network interface, USB port or E1
Interface etc..
Further, described control circuit also includes that communication couples circuit, it is achieved the modulation of multi signal.
Further, described control circuit also includes crystal oscillator output circuit, uses High Accuracy Constant Temperature crystal oscillator, institute
State high accuracy and refer to the frequency accuracy≤± 0.01ppm@25 DEG C of described constant-temperature crystal oscillator, temperature frequency degree of stability
For ± 0.001ppm, described MCU module, FPGA module and the modulation circuit of described modem
Assembly shares the crystal oscillator source that described crystal oscillator output circuit provides.
Further, described control circuit also includes USB interface.
Further, described control circuit also includes AccessPort passage.
Further, described FPGA module is by fpga chip, local oscillator, RX/TX radio circuit and PLL
Chip forms.
The man machine interface satellite modem control circuit that has of present invention offer achieves satellite modulation
The real-time monitoring of the RF index of the radio frequency logical gate circuit of demodulation, it is possible to every according to obtained by monitoring
Parameter carries out the compensation calculation of temperature, frequency, and reaches quickly to adjust radio frequency power output and intermediate frequency with this
Receive in the ideal scope of power to one, thus it is every to equipment with temperature to solve different environment
The impact of RF index so that it is can always work in a relatively stable state.And provide one group
Based on man machine interface, each peripheral hardware interface be auxiliary improve communication environment, user can be right as required
System carries out configuring, manage and monitoring.And the real-time parameter that some are important can be changed into voltage output very
To report output can be formed to peripheral hardware or storage device, to facilitate engineering staff and maintainer to join
Examine.Merely with this simple external memory storage of USB flash disk, equipment can be carried out software upgrade and update.Again simultaneously
There is simple circuit, feature highly reliable, with low cost.
Below with reference to accompanying drawing, the technique effect of design, concrete structure and the generation of the present invention is described further,
To be fully understood from the purpose of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of a preferred embodiment of the present invention.
Detailed description of the invention
As it is shown in figure 1, the satellite modem control circuit that the present invention has man machine interface includes for controlling electricity
AC-DC power module that road plate is powered, for monitoring in real time and the embedded control chip MCU mould that adjusts
Block, radio frequency and logic circuit FPGA module for radio-frequency receiving-transmitting, and the man-machine boundary for man-machine interaction
Face mould block.MCU module includes digital-to-analogue conversion and AD conversion unit, MCU module by RS232 serial ports with
Man machine interface carries out communication, gathers the every of described modem by digital-to-analogue conversion and AD conversion unit
Parameter, carries out data exchange, to FPGA module by SPI control line and data/address bus with FPGA module
RF index monitors in real time, according to the temperature to described FPGA module of the parameters obtained by monitoring
Calculating is compensated with frequency.
Wherein, civil power 220V is converted to 24V by AC-DC power module, and whole control circuit is all from power supply mould
The direct power taking of block, the input voltage on Zhi Xu mono-tunnel 40～24V, it is possible to be divided into the voltage pair of 6 tunnel difference demands
Circuit portions is powered, and power circuit is through good Filtering Processing, reduces noise and ripple as far as possible
Impact, thus reduce the actual power loss of input power further.For circuit overall power consumption, noise jamming
Vital effect is played etc. index.
MCU module use LPC2468 chip as MCU, this chip is integrated with Flash, EEPROM,
Multifunctional equipment and the interfaces such as RAM, external storage controller, ADC, SCI, SPI, USB interface,
Not only enormously simplify circuit, saved cost, and improve reliability of operation and stability.MCU
The effect of module is as follows:
(1) under general work environment, be not detected by the access of external equipment, then control circuit acquiescence with
Man machine interface is acquiescence communication output interface.Access if any external equipment, then carry out for main equipment with this equipment
Communication, man machine interface locks.After USB flash disk or similar exterior storage medium insert USB interface, then can pass through
Man machine interface option carries out software upgrading upgrading.
(2) after circuit determines communication interface, then respond the monitor command of relevant device, adopt according to AD
Supply voltage that collection arrives, electric current, the parameters such as temperature parameter, and local radio frequency parameter table and remotely joining
Put every radio frequency parameter of file configuration outdoor unit, facility information, analog-digital conversion data synopsis, temperature
Compensation table, the parameters of power correction carry out the compensation of power-frequency.
(3) the multi-point temp value of Real-time Collection panel and rf board, and calculate one relatively reasonable
Real time temperature, by temperature compensation table, determines every temperature compensation value.Further according to ongoing frequency, comparison temperature
Degree frequency meter, determines the frequency compensation value at a temperature of this.Finally by two offsets and the current power gathered
Voltage combines and calculates, and determines that current ODU needs the transmitting power target level value reached.
(4) algorithm controls the most accurate is provided, according to launching power target level value by controlling 4
Group radio frequency path digital pad (SPI is controlled to fpga logic circuit) quickly adjusts and stable real
Border output power value.Thus ensure that in the case of varying environment, temperature and frequency, its output begins
A stable duty can be maintained at eventually.
(5) gather medium frequency reception power level signal by analog digital conversion (AD) real time high-speed, worked as
Reception power meter in front received power value, and corresponding MCU, calculates in conjunction with temperature and frequency compensation value,
Finally determining medium frequency reception power target level value, MCU is according to this value and by controlling 4 groups of radio frequency path numbers
Word attenuator quickly adjusts and stable actual medium frequency reception performance number.
(6) Real-time Collection each road radio frequency, intermediate-freuqncy signal, to radio frequency, the transmitting power of logical telephone, declines
Depreciation, frequency, the bit error rate, receiving sensitivity, Up/Down Conversion state monitor in real time, and comparison is correlated with
Thermometer, frequency meter, the compensation of trip temperature, the frequency of going forward side by side in conjunction with the parameter such as the bit error rate, receiving sensitivity
Calculating or small parameter perturbations, MCU will judge that current circuit is the most working properly, once finds different as requested
Reason condition produces the most in time and alerts mark accordingly, on the one hand notice Current communications equipment, on the other hand lights
Alert lampet accordingly.
(7) monitoring each road phaselocked loop state in real time, MCU module will judge current PLL electricity as requested
Road part is the most working properly, once unusual circumstance, produces in time and alerts mark accordingly, on the one hand
Notice Current communications equipment, on the other hand lights and alerts lampet accordingly.
(8) it is that the FPGA master chip of logic circuit carries out logic programming.Open electricity and necessary situation every time
Under, MCU may utilize the PS downloading mode of FPGA, and FPGA carries out the write of program.User just can be with
This utilizes the same file same USB flash disk same USB interface of memorizer to complete whole system very easily
Upgrading and the renewal of all softwares of the logical gate of FPGA is included including the control part of MCU.
FPGA module includes fpga chip, local oscillator, RX/TX radio circuit, PLL chip etc..This module
Complete radio-frequency receiving-transmitting function, and data are modulated the functions such as demodulating algorithm process, with control circuit plate
Data exchange is carried out by SPI control line and data/address bus.Complete radio-frequency receiving-transmitting function, and data are carried out
The functions such as modulation and demodulation algorithm process.Can connect on data/address bus between MCU module and FPGA module
There is 32M or 64M flash memory, be used for storing data.
Containing display screen and keyboard in human-computer interface module, by a spi bus or RS232 serial ports and control
Circuit processed connects, and whole modulation demodulation system can be entered by user by the LCDs at this interface and keyboard
Row in real time monitoring, it is achieved man machine interface mutual.Simultaneously, moreover it is possible to carry out Real Data Exchangs with external equipment.
And for convenience of engineering staff's field adjustable, have an extra AccessPort passage, to ensure one
The most in particular cases, specific debugging software can be used to carry out communication debugging, to reach directly to debug satellite modulation
The purpose of demodulator.And either man machine interface or external equipment all must have and configure at any time and control
Ability.Site operation personnel can also carry out online software upgrade etc. by USB storage parts such as USB flash disks
Work, facilitates later maintenance and software to strengthen.
The work process of this control circuit is: after MCU module receives man machine interface or external equipment signal,
After gathering relevant parameter by digital-to-analogue conversion and AD conversion unit, carry out data exchange with FPGA module,
The transmitting power of FPGA, pad value, frequency, the bit error rate, receiving sensitivity, Up/Down Conversion state are entered
Row monitoring in real time, and by inquiry thermometer, frequency meter, in conjunction with the bit error rate, receiving sensitivity parameter,
Transmitting power and pad value to described radio frequency logic circuit compensate calculating or small parameter perturbations.
This control circuit also includes a communication coupling circuit, can be realized the modulation of multi signal by this circuit,
It is finally reached this control circuit and BUC (up-conversion power amplifier), LNB (down coversion low noise amplification
Device) between information receive and send purpose.This design makes power supply signal couple with radiofrequency signal
In a circuit.Signal can be by modes such as serial ports, program burn writing debugging interface, 10/100M network interfaces
Input.
This control circuit also includes crystal oscillator output processing circuit: use High Accuracy Constant Temperature crystal oscillator, high accuracy to refer to
Its frequency accuracy≤± 0.01ppm@25 DEG C, temperature frequency degree of stability reach ± 0.001ppm, ensure simultaneously
MCU, FPGA, PLL, modulation circuit, AD, DA multicompartment share crystal oscillator source, synchronize at clock
On the basis of accomplish zero interference each other.
This control circuit circuit provide some can test interface, automatization when research and development of products and later stage produce
Test uses.Also include the pin-saving chip of IIC interface, for the buffering of ephemeral data, storage and pre-
Read.
This control circuit has extra AccessPort passage, to ensure at some in particular cases, can use spy
Determine debugging software and carry out communication debugging, to reach directly to debug the purpose of satellite modem.And either
Man machine interface or external equipment all must have the ability carrying out configuring Yu control at any time.Site operation personnel is also
The work such as online software upgrade can be carried out by the USB storage part such as USB flash disk, facilitate later maintenance and
Software is strengthened.
The preferred embodiment of the present invention described in detail above.Should be appreciated that the ordinary skill of this area without
Creative work just can make many modifications and variations according to the design of the present invention.Therefore, all in the art
Technical staff passes through logical analysis, reasoning, or a limited experiment the most on the basis of existing technology
Available technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (1)
1. there is a satellite modem control circuit for man machine interface, including AC-DC power module, embedding
Entering formula control chip MCU module, radio frequency and logic circuit FPGA module and human-computer interface module, it is special
Levy and be, described AC-DC power module input 220V alternating current, export 24V unidirectional current, to described control
Circuit processed is powered, and described MCU module includes digital-to-analogue conversion and AD conversion unit, and described MCU module is led to
Cross RS232 serial ports and connect described human-computer interface module, connect external equipment by communication interface, receive described
Human-computer interface module or the monitor command of described external equipment, use described digital-to-analogue conversion and AD conversion unit
Gather supply voltage, electric current, temperature parameter, by SPI control line and data/address bus and described FPGA mould
Block carries out data exchange, to transmitting power, pad value, frequency, the bit error rate of described FPGA module, connects
Receive sensitivity, Up/Down Conversion state monitors in real time, and by inquiry thermometer, frequency meter, in conjunction with by mistake
Code check, receiving sensitivity parameter, transmitting power and pad value to described FPGA module compensate calculating；
Wherein said communication interface is serial ports, program burn writing debugging interface or 10/100M network interface；
Wherein said MCU module is LPC2468 chip；
Wherein said control circuit includes crystal oscillator output circuit, uses High Accuracy Constant Temperature crystal oscillator, its frequency accuracy≤
± 0.01ppm@25 DEG C, temperature frequency degree of stability are ± 0.001ppm, described MCU module, FPGA mould
The modulation circuit assembly of block and described modem shares the crystal oscillator source that described crystal oscillator output circuit provides；
Wherein said control circuit includes USB interface；
Wherein said control circuit includes AccessPort passage；
Wherein said FPGA module is made up of fpga chip, local oscillator, RX/TX radio circuit and PLL chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310338240.8A CN103427896B (en) | 2013-08-05 | 2013-08-05 | There is the satellite modem control circuit of man machine interface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310338240.8A CN103427896B (en) | 2013-08-05 | 2013-08-05 | There is the satellite modem control circuit of man machine interface |
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| Publication Number | Publication Date |
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| CN103427896A CN103427896A (en) | 2013-12-04 |
| CN103427896B true CN103427896B (en) | 2016-09-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105162476A (en) * | 2015-08-20 | 2015-12-16 | 牟丽 | Embedded automatic tuning control system of short wave transmitter |
| CN107991981B (en) * | 2017-12-05 | 2019-09-20 | 迈普通信技术股份有限公司 | A kind of service board and electronic equipment |
| CN110620554A (en) * | 2018-06-19 | 2019-12-27 | 广东技术师范学院 | 200Mhz bandwidth input frequency converter |
| CN111404596B (en) * | 2020-03-27 | 2022-01-28 | 南京宽超通信技术有限公司 | Satellite downlink high-frequency head controller |
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| CN101291185A (en) * | 2008-06-17 | 2008-10-22 | 上海杰盛无线通讯设备有限公司 | Monitoring circuit for microwave outdoor unit |
| CN102142884A (en) * | 2010-01-29 | 2011-08-03 | 熊猫电子集团有限公司 | Satellite network multifunctional common hardware reference platform and control method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291185A (en) * | 2008-06-17 | 2008-10-22 | 上海杰盛无线通讯设备有限公司 | Monitoring circuit for microwave outdoor unit |
| CN102142884A (en) * | 2010-01-29 | 2011-08-03 | 熊猫电子集团有限公司 | Satellite network multifunctional common hardware reference platform and control method thereof |
Non-Patent Citations (1)
| Title |
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