CN102970070B - VSAT (Very Small Aperture Terminal) satellite communication L wave band up-converter control method - Google Patents
VSAT (Very Small Aperture Terminal) satellite communication L wave band up-converter control method Download PDFInfo
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- CN102970070B CN102970070B CN201210481137.4A CN201210481137A CN102970070B CN 102970070 B CN102970070 B CN 102970070B CN 201210481137 A CN201210481137 A CN 201210481137A CN 102970070 B CN102970070 B CN 102970070B
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Abstract
The invention provides a VSAT (Very Small Aperture Terminal) satellite communication L wave band up-converter control method, comprising the following steps: step 1, initializing a system; step 2, entering a waiting state, and entering step 3 if detecting that an input order exists in the waiting state; step 3, judging the order, entering step 4 if judging that the order is true, and returning back to step 2 if judging that the order is not true; step 4, processing the order; and step 5, controlling event processing and returning back to step 2 after the upper converter completes the operation. Controlling the event processing in step 5 comprises the following event processing of pre-selector arrangement, middle-frequency bandwidth arrangement, program control attenuation control, first local oscillator frequency control and second local oscillator frequency control. With the adoption of the VSAT satellite communication L wave band up-converter control method provided by the invention, the input order is received; relative modules of the upper-converter can be automatically controlled; and the corresponding parameters can be adjusted, so that the intelligent control can be realized; the real-time operation of the input order can be realized; the parameter adjusting time can be reduced; and the operation reliability and the rapidness of the upper-converter can be improved.
Description
Technical field
The present invention relates to electronic communication field, relate to a kind of VSAT satellite communication L-band upconverter control method
Background technology
VSAT(Very Small Aperture Terminal, very small aperture antenna earth station) carry out satellite communication and have that flexibility is strong, reliability is high, easy to use and small station directly can be contained in the features such as user side, utilize VSAT user terminal can directly and computer networking, complete the communication tasks such as data transmission, exchange files, image transmitting, thus break away from the problem of repeater, telecommunication ground.Therefore VSAT is used to be a kind of well selection as special telecommunication system.So-called small-bore, the bore refering in particular to satellite signal receiving antenna is less, usually only has 1.2 to 2.4 meters.
In satellite communication system, the frequency range being applicable to deep space communication is the rf frequency section being greater than 1G, and in the conventional frequency section of earth surface area signal transmission well below radio band, rf frequency carries out modulation-demodulation technique to signal, and to realize difficulty very big and uneconomical, therefore prior art is that the rf frequency intermediate frequency therebetween of base band frequency and the space transmission utilizing to be positioned at terrestrial transmission is as transition, first baseband frequency signal will move on to this intermediate frequency, this intermediate frequency carries out modulation /demodulation to signal, again signal is carried out spectral conversion and become radiofrequency signal towards space lunch, upconverter is the ground satellite station transmitter realizing shifting function in said frequencies.
Utilize the satellite communication general means covered as broadcast television transmissions at home at present, according to IEEE 521-2002 standard, L-band refers to the radio waveband of frequency at 1-2 GHz, the upconverter of satellite communication L-band is used for carrying out L-band transmitting to satellite, possesses gain-adjusted, bandwidth adjustment, the multiple functions such as frequency decay, to reach good launching effect, if control all to rely on manually to carry out Non-follow control to it to the operation of upconverter, time and effort consuming and easily makeing mistakes.
In addition the transmission characteristic of the wireless and high frequency of L-band, also the interference of its very easily extraneous factor is caused, these external interference not only cause transmission quality to decline, and due to satellite communication cover extensity and instantaneity, from being found to process, even if the time of making a mistake is very short, also easily causes and have a strong impact on.
Summary of the invention
Long for overcoming the control reaction time of prior art to L-band upconverter, the deficiency of pure Artificial Control fallibility consuming time, the invention provides a kind of VSAT satellite communication L-band upconverter control method.
VSAT satellite communication L-band upconverter control method of the present invention, comprises the steps:
Step 1. system initialization, is arranged each parameter initialization of upconverter;
Step 2. enters wait state; If input command detected in wait state, then enter step 3;
Step 3. command determination, if be judged as true, then enter step 4, otherwise returns step 2;
Step 4. command process;
Step 5. controls event handling, returns step 2 to after upconverter complete operation.
Concrete, described step 1 comprises the initialization controlling I/O port, preselector arranges initialization, upconverter intermediate-frequency bandwidth selection initialization, program control decay initialization, first vibration frequency controls initialization, the second local frequency controls initialization and the setting of upconverter constant.
Concrete, described step 4 command process comprises:
Step 41. carries out subpackage process to input packet, will input data subpackage, and each data after subpackage comprise and judge byte and command byte;
Data after step 42. pair subpackage carry out event type judgement, from the judgement byte the data after subpackage with establish in advance
The event reserved judges that byte compares and draws event type to be processed;
Command byte in data after step 43. pair subpackage processes, and identifies event type.
Concrete, control event handling in described step 5 and comprise process to following event: preselector settings, intermediate-frequency bandwidth settings, the control of program control adjustable attenuation, first vibration frequency, the second local frequency control.
Preferably, during more than one of the event that controls in described step 5, be parallel processing to the process of the event of control.
Further, in described step 5, the process that preselector arranges event is comprised the steps:
Step 501. is decoded to input packet, identifies the band connection frequency that preselector is arranged;
Step 502. sets preselector frequency channel;
Step 503. controls upconverter and transmits from the preselector frequency channel of setting.
Further, in described step 5, first vibration frequency controls event and comprises and setting the local frequency of the first frequency-variable module of upconverter; The local frequency that described second local frequency control event comprises the second frequency-variable module of upconverter sets.
Further, the intermediate-frequency bandwidth in described step 5 arranges event and comprises and select the bandwidth starting point of module and terminal to set to the intermediate-frequency bandwidth of upconverter.
Further, in described step 5, the process of program control adjustable attenuation is comprised the steps:
Step 511. identifies the signal being in all tranmitting frequencies of L-band in transmitting of upconverter;
Step 512. sets tranmitting frequency output amplitude value A;
All output amplitude values being in L-band transmit frequency signal are set to A by step 513..
Adopt VSAT satellite communication L-band upconverter control method of the present invention, receive input instruction, the correlation module of upconverter is controlled automatically, adjustment relevant parameter, achieve Based Intelligent Control, real-time operation is achieved to the instruction of input, shortens the parameter adjustment time, improve operating reliability and the agility of upconverter.
Accompanying drawing explanation
Fig. 1 illustrates the step block diagram of a kind of embodiment of the present invention;
Fig. 2 illustrates that each control event described of the present invention is to the control planning schematic diagram of corresponding module in upconverter.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Upconverter utilizes and is positioned at base band frequency and a rf frequency intermediate frequency therebetween as transition, first baseband frequency signal will move on to this intermediate frequency, this intermediate frequency carries out modulation /demodulation to signal, again signal is carried out spectral conversion and become radiofrequency signal towards space lunch, upconverter is the ground satellite station transmitter realizing shifting function in said frequencies.
Upconverter selects module to carry out frequency and gain setting to intermediate-freuqncy signal wherein through intermediate-frequency bandwidth after receiving the input signal that other equipment are transmitted by wired or wireless mode.After the first frequency-variable module and the second frequency-variable module carry out twice frequency is moved, then launch from transmitter module.Described transmitter module comprises preselector, for selecting the frequency range used when transmitting.
A kind of VSAT satellite communication L-band upconverter control method of the present invention, comprises the steps:
Step 1. system initialization, is arranged each parameter initialization of upconverter;
Step 2. enters wait state; If input command detected in wait state, then enter step 3;
Step 3. command determination, if be judged as true, then enter step 4, otherwise returns step 2;
Step 4. command process;
Step 5. controls event handling, returns step 2 to after upconverter complete operation.
Above-mentioned steps 1 to 5 is for realizing the basic step of VSAT satellite communication L-band upconverter control method of the present invention, and system initialization is set the work initial state of upconverter, avoids the appearance of indefinite state to affect upconverter and normally works.After upconverter enters wait state, whether being broken of wait state depends on the external world has order to input, if there is order to input, then enters NextState, otherwise wait state continues.In command determination step, true and false judgement is carried out to the order of input in step 2, if judge that order is true, then enters NextState, otherwise get back to wait state; Judge the order true and false according to being that the signaling of input and the data that preset are compared, meet completely, think that order is true, otherwise think illegal command, system judge order be illegal after, turn back to wait state.The data of command process step to input carry out the subpackage process of order, after identifying concrete control event, carry out parallel processing in steps of 5 to control event.
Concrete, VSAT satellite communication L-band upconverter control method of the present invention step 1 comprises the initialization controlling I/O port, preselector arranges initialization, upconverter intermediate-frequency bandwidth selects initialization, program control decay initialization, first vibration frequency controls initialization, the second local frequency controls initialization and the setting of upconverter constant.The input port of definition upconverter and output port etc. are comprised to controlling the initialization of I/O port, arrange initialization to preselector to comprise and setting the initial output band of preselector, selecting initialization to comprise to intermediate-frequency bandwidth selects module to carry out the initial setting of intermediate-frequency bandwidth to the intermediate-frequency bandwidth of upconverter, first and second local frequencies control initialization are initializing set is carried out to the local frequency of the first and second frequency-variable modules in upconverter, program control decay initialization carries out Initialize installation to the emission parameter of upconverter transmitter module, in addition, system initialization process also comprises and carries out initialization to other constant parameter of upconverter.The implementation of the system initialization of described step 1 is definition data flow, according to the data address corresponding relation preset, each data in data flow is sent to modules successively and carries out corresponding parameter configuration, completion system initialization procedure.
Described in VSAT satellite communication L-band upconverter control method of the present invention, step 4 command process comprises:
Step 41. carries out subpackage process to input packet, will input data subpackage, and each data after subpackage comprise and judge byte and command byte;
Data after step 42. pair subpackage carry out event type judgement, from the judgement byte the data after subpackage with establish in advance
The event reserved judges that byte compares and draws event type to be processed;
Command byte in data after step 43. pair subpackage processes, and identifies event type.
Command process step is the partition decode procedure of the packet to input, the packet that command process step receives may comprise a more than concrete event, need first to carry out subpackage process to it, each packet after subpackage both defines a concrete event, have in packet after subpackage and judge byte and command byte, first to judging with the event preset, byte judges that byte compares, judging event type, then from command byte, reading concrete event.Such as in first vibration frequency control event, need first from judging to judge byte that this event is that first vibration frequency controls event, then from command byte, read concrete event information, such as arranging first vibration frequency is 70M.
Concrete, in the step 5 of VSAT satellite communication L-band upconverter control method of the present invention, control event handling comprise process to following event: preselector settings, intermediate-frequency bandwidth settings, the control of program control adjustable attenuation, first vibration frequency, the second local frequency control.
Preferably, be parallel to the process of these events, parallel processing can speed up processing, and user can input multiple command event simultaneously, arranges the disparate modules of upconverter simultaneously.
Concrete: in described step 5, the process that preselector arranges event to be comprised the steps:
Step 501. is decoded to input packet, identifies the band connection frequency that preselector is arranged;
Step 502. sets preselector frequency channel;
Step 503. controls upconverter and transmits from the preselector frequency channel of setting.
The transmitter module of upconverter comprises a preselector, carry out control to the passage transmitted to select, preselector is a filter in essence, bandpass filtering is carried out to input signal, the bandwidth of filter is arranged can have multiple form to realize, such as RC filter, by changing the occurrence of resistance R and electric capacity C, can change the bandwidth of filter or the passband position of filter.In the present invention, the setting to preselector passband is to the setting of preselector, first the passband information comprised is read to output decoded packet data, subsequently according to the passband of the information setting preselector filtering read, comprise bandwidth sum passband end points.The signal transmission circuit finally controlled in transmitter module transmits from the preselector frequency channel of setting.
First vibration frequency in step 5 controls event and comprises and setting the local frequency of the first frequency-variable module of upconverter; The local frequency that described second local frequency control event comprises the second frequency-variable module of upconverter sets; Intermediate-frequency bandwidth in step 5 arranges event and comprises and select the bandwidth starting point of module and terminal to set to the intermediate-frequency bandwidth of upconverter; In step 5, the process of program control adjustable attenuation event is comprised the steps:
Step 511. identifies the signal being in all tranmitting frequencies of L-band in transmitting of upconverter;
Step 512. sets tranmitting frequency output amplitude value A;
All output amplitude values being in L-band transmit frequency signal are set to A by step 513..
Above-mentioned program control adjustable attenuation event comprises carries out two aspect process to transmitting:
1) make all amplitude output signal values being in L-band frequency in output frequency equal;
2) equal to this amplitude output signal value sets.
First identify during upconverter transmits all output signals being in L-band frequency, range value A is launched in setting
After, all transmitting amplitudes being in the output signal of L-band frequency are all set to A.
The method that each step above-mentioned can adopt computer software to programme in advance and arrange realizes, the calling and run of described computer software programs can use anyly possesses the equipment of central processor CPU and memory function and the equipment of corresponding kit, such as PC, single-chip microcomputer, the realizations such as integrated circuit (IC) chip, design developed by the preferred reason Keil4 platform of develop computer software instrument of the present invention, and described Keil4 is 51 serial compatible Single Chip C Language software development systems of U.S. Keil Software Company; Provide the complete development plan comprising C compiler, Macro assembler, connector, library management and simulation debugger etc., Keil4 platform feature is powerful, compatible with various operating system, facilitates easy-to-use.
Adopt VSAT satellite communication L-band upconverter control method of the present invention, receive input instruction, the correlation module of upconverter is controlled automatically, adjustment relevant parameter, achieve Based Intelligent Control, real-time operation is achieved to the instruction of input, shortens the parameter adjustment time, improve operating reliability and the agility of upconverter.
The method that in the present invention, the disclosed embodiments describe or the software module that the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Previously described is each preferred embodiment of the present invention; design parameter in described embodiment and embodiment is only the invention proof procedure in order to clear statement inventor; absolutely not in order to limit scope of patent protection of the present invention; scope of patent protection of the present invention is still as the criterion with its claims; the equivalent structure change that every utilization specification of the present invention and accompanying drawing content are done, in like manner all should be included in protection scope of the present invention.
Claims (8)
1. a VSAT satellite communication L-band upconverter control method, comprises the steps:
Step 1. system initialization, is arranged each parameter initialization of upconverter;
Step 2. enters wait state; If input command detected in wait state, then enter step 3;
Step 3. command determination, if be judged as true, then enter step 4, otherwise returns step 2;
Step 4. command process;
To input the form input command of packet in described command process step;
Step 41. carries out subpackage process to input packet, will input data subpackage, and each data after subpackage comprise and judge byte and command byte;
Data after step 42. pair subpackage carry out event type judgement, from the judgement byte the data after subpackage with establish in advance
The event reserved judges that byte compares and draws event type to be processed;
Command byte in data after step 43. pair subpackage processes, and identifies event information;
Step 5. controls event handling, returns step 2 to after upconverter complete operation.
2. VSAT satellite communication L-band upconverter control method as claimed in claim 1, is characterized in that: described step 1 comprises the initialization controlling I/O port, preselector arranges initialization, upconverter intermediate-frequency bandwidth selection initialization, program control decay initialization, first vibration frequency controls initialization, the second local frequency controls initialization and the setting of upconverter constant.
3. VSAT satellite communication L-band upconverter control method as claimed in claim 1, is characterized in that: control event handling in described step 5 and comprise process to following event: preselector settings, intermediate-frequency bandwidth settings, the control of program control adjustable attenuation, first vibration frequency, the second local frequency control.
4. the VSAT satellite communication L-band upconverter control method as described in claim 1 or 3, is characterized in that: during more than one of the event that controls in described step 5, is parallel processing to the process of the event of control.
5. VSAT satellite communication L-band upconverter control method as claimed in claim 3, is characterized in that: comprise the steps: the process that preselector arranges event in described step 5
Step 501. is decoded to input packet, identifies the band connection frequency that preselector is arranged;
Step 502. sets preselector frequency channel;
Step 503. controls upconverter and transmits from the preselector frequency channel of setting.
6. VSAT satellite communication L-band upconverter control method as claimed in claim 3, is characterized in that: the intermediate-frequency bandwidth in described step 5 arranges event and comprises and select the bandwidth starting point of module and terminal to set to the intermediate-frequency bandwidth of upconverter.
7. VSAT satellite communication L-band upconverter control method as claimed in claim 3, is characterized in that: in described step 5, first vibration frequency controls event and comprises and setting the local frequency of the first frequency-variable module of upconverter; The local frequency that described second local frequency control event comprises the second frequency-variable module of upconverter sets.
8. VSAT satellite communication L-band upconverter control method as claimed in claim 3, is characterized in that: comprise the steps: the process of program control adjustable attenuation in described step 5
Step 511. identifies the signal being in all tranmitting frequencies of L-band in transmitting of upconverter;
Step 512. sets tranmitting frequency output amplitude value A;
All output amplitude values being in L-band transmit frequency signal are set to A by step 513..
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| CN201210481137.4A CN102970070B (en) | 2012-11-23 | 2012-11-23 | VSAT (Very Small Aperture Terminal) satellite communication L wave band up-converter control method |
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| CN101469709A (en) * | 2007-12-27 | 2009-07-01 | 上海开通数控有限公司 | Computer control method for compressor operation remote monitoring |
| CN101609427A (en) * | 2009-07-15 | 2009-12-23 | 广东威创视讯科技股份有限公司 | A kind of programmable network automatization of service test macro and method |
| CN102638228A (en) * | 2012-03-09 | 2012-08-15 | 北京创毅讯联科技股份有限公司 | Up-converter and up-conversion method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469709A (en) * | 2007-12-27 | 2009-07-01 | 上海开通数控有限公司 | Computer control method for compressor operation remote monitoring |
| CN101609427A (en) * | 2009-07-15 | 2009-12-23 | 广东威创视讯科技股份有限公司 | A kind of programmable network automatization of service test macro and method |
| CN102638228A (en) * | 2012-03-09 | 2012-08-15 | 北京创毅讯联科技股份有限公司 | Up-converter and up-conversion method |
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