CN202818322U - Indirect modulation-demodulation data transmission device and application system thereof - Google Patents
Indirect modulation-demodulation data transmission device and application system thereof Download PDFInfo
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- CN202818322U CN202818322U CN 201220423056 CN201220423056U CN202818322U CN 202818322 U CN202818322 U CN 202818322U CN 201220423056 CN201220423056 CN 201220423056 CN 201220423056 U CN201220423056 U CN 201220423056U CN 202818322 U CN202818322 U CN 202818322U
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Abstract
The utility model discloses an indirect modulation-demodulation data transmission device and an application system thereof. The device comprises: an error correction of coding module; a modulation module, which is connected with the error correction of coding module; an emission filter module, which is connected with the modulation module; a waveform amplitude adjustment and emission switch control module, which is connected with the emission filter module; a gain control module; a receiving filter module, which is connected with the gain control module; a demodulation module, which is connected with the receiving filter module; and an error correction of decoding module, which is connected with the demodulation module. The device modulates digital information into base-band modulation signals within an audio frequency band, realizes a function of digital information transmission of an ultrashort wave telephone traffic radio station, is low in implementation cost and strong in universality, will not change the original structure of a radio station, and is convenient to large-scale popularization.
Description
Technical field
The utility model relates to and utilizes ultra short wave communication equipment to carry out the technique device of transfer of data, relates in particular to a kind of indirect modulation /demodulation number and passes device and application system thereof.
Background technology
Current plain edition ultrashort wave radio set function is used take traffic call, phonic communication as main, such as the ship platform deck of operation on the sea naval vessel standard configuration, various uses aircraft equipment airborne, bent widely used all kinds of Vehicle mounted stations and base station etc.Although the traffic radio station of simple function exist use and understand on convenience, easily statement or listen and debate mistake of transmission of speech information, and can't transmit complicated digital information, inefficiency.Follow all kinds of terminal equipment digitlizations, automaticity to improve, the proportion of data service in ultra short wave communication is just in fast rise.The ultrashort wave radio set purchase cost that has in the market number/words dual mode capability significantly is higher than common traffic radio station, causes adopting novel number/words dual mode radio to build the high expensive of ultrashort wave number telephone network; When adopting simultaneously new radio station mode to implement networking or systemic-function upgrading, the unfavorable situation that the huge active service traffic radio station of quantity is idle, waste also can appear.
At present adopt the analog intermediate frequency modulation in the audio signal modulation in the common ultrashort wave traffic radio station of usefulness, such as modulating FM, amplitude modulation AM, single-side belt SSB etc.; Ultrashort wave radio set with data/traffic dual-transfer mode function, analog intermediate frequency and digital intermediate frequency modulation have been adopted respectively in its traffic call and digital information modulation, such as FSK, PSK etc.All bend in direct modulation type in above-mentioned traffic radio station and the dual-purpose radio station of number/words, realize having adopted inner integrated intermediate frequency Modulation mode in technology, product structure and functional module are solidified, and technology upgrading or function upgrading performance difficulty are especially true for the old model radio station that running time is long.
The utility model content
The utility model has overcome the defects of prior art, has proposed a kind of indirect modulation /demodulation number and has passed device and application system thereof.The utility model adopts indirect modulation technique, be the baseband modulation signal of similar traffic audio volume control and the voice transfer passage that imports the traffic radio station with the digital information modulation conversion, through ultrashort wave traffic radio station carry out follow-up intermediate frequency Modulation, rf conversion is broadcast after processing.This digital information transmission mode does not change original traffic broadcasting station structure and interface shape, pass device by external indirect modulation /demodulation number of the present utility model and realized the transfer of data in ultrashort wave traffic radio station, expanded the single traffic function in former ultrashort wave traffic radio station, implemented and the engineering application facet all has well and produces effects in technology.
The utility model proposes a kind of indirect modulation /demodulation number and pass device, comprising:
The error correction coding module;
Modulation module, it is connected with described error correction coding module;
The emission filter module, it is connected with described modulation module;
Wave-shape amplitude is adjusted and the emission switch control module;
Gain control module;
The receiving filter module, it is connected with described gain control module;
Demodulation module, it is connected with described receiving filter module;
The error-correcting decoding module, it is connected with described demodulation module.
Wherein, described error correction coding module is RS code error correction coding module.
Wherein, described error-correcting decoding module is RS code error-correcting decoding module.
Wherein, described modulation module is 8-Level CPFSK modulation module, 6MSK modulation module.
Wherein, described demodulation module is 8-Level CPFSK demodulation module, 6MSK demodulation module.
The utility model has also proposed a kind of ultrashort wave wireless data sending application system, comprising: ultrashort wave traffic radio station, indirect modulation /demodulation number pass device and data module;
Described ultrashort wave traffic radio station, it passes device with described indirect modulation /demodulation number and is connected;
Described data module, it passes device with described indirect modulation /demodulation number and is connected.
Wherein, described ultrashort wave traffic radio station comprises:
Audio-frequency module, it passes device with described indirect modulation /demodulation number and is connected;
Ifd module, it is connected with described audio-frequency module;
Radio-frequency module, it is connected with described ifd module.
In the situation that the indirect modulation /demodulation number biography of the utility model device can not change at structure and the information transmission mode thereof in original ultrashort wave traffic radio station, realize digital information transmission by indirect modulation.The utility model application system has inclusion relation for former ultrashort wave traffic radio station; do not change former ultrashort wave traffic broadcasting station structure; function and signal processing; just increased on its basis independently indirect modulation-demodulation device newly; and realized that by former ultrashort wave traffic radio station outside line audio interface the signal adaptation between the two connects; the simple function ultrashort wave traffic radio station huge for present quantity on hand provides a kind of function upgrading that carries out; the effective way of application extension; avoided this type of ultrashort wave traffic radio station to be left unused; the unfavorable situation of waste has effectively been protected the existing equipment investment.
The utility model adopts indirect modulation technique, can be with the information of the mode transmission of digital signals of audio base-band modulation signal.If do not use the radio station of the indirect modulation technique of the utility model can't demodulate digital signal in the audio base-band modulation signal, have higher fail safe.
The data processing method that the utility model can be upgraded in modulation /demodulation module, the error correction coding decoding module changes, and maintenance cost is low.Relatively adopt number/words bimodulus ultrashort wave radio set of newly purchasing of reactance modulation system to carry out the application system structure, the utility model device has obvious comparison advantage at construction cost, engineering construction, operation maintenance, Function Extension/aspects such as upgrading flexibility.
Indirect modulation /demodulation number of the present utility model passes device and adopts the RS232/RS485 serial line interface to be connected with miscellaneous part, has good function expansibility with compatible.
Description of drawings
Fig. 1 is the schematic diagram of the utility model ultrashort wave wireless data sending application system;
Fig. 2 is the connection diagram that the indirect modulation /demodulation number of the utility model passes device;
Fig. 3 is the hardware circuit schematic diagram of ultrashort wave wireless data sending application system in the utility model;
Fig. 4 is the schematic diagram that uses the utility model ultrashort wave wireless data sending application system;
Fig. 5 is the product process schematic diagram of RS error correction coding in the utility model.
Fig. 6 is the front view of the indirect modulation-demodulation device of the utility model.
Fig. 7 is the vertical view of the indirect modulation-demodulation device of the utility model.
Fig. 8 is the rearview of the indirect modulation-demodulation device of the utility model.
Fig. 9 is the schematic diagram of the utility model connecting interface.
Embodiment
In conjunction with following specific embodiments and the drawings, the utility model is described in further detail.Implement process of the present utility model, condition, experimental technique etc., except the following content of mentioning specially, be universal knowledege and the common practise of this area, the utility model is not particularly limited content.
Shown in Fig. 1-5,1-ultrashort wave traffic radio station, the indirect modulation /demodulation number of 2-passes device, 3-data module.The 11-audio-frequency module, the 12-ifd module, 13-radio-frequency module, 14-transmit-receive switch and antenna, 21-error correction coding module, the 22-modulation module, 23-emission filter module, the 24-wave-shape amplitude is adjusted and the emission switch control module, the 25-gain control module, 26-receiving filter module, 27-demodulation module, 28-error-correcting decoding module.
Indirect modulation /demodulation number of the present utility model passes device 2, as shown in Figure 2, comprising:
Error correction coding module 21, its data message for input are carried out the channel error correction coding and are processed;
Wave-shape amplitude is adjusted and emission switch control module 24, and it is connected with emission filter module 23, and the audio base-band modulation signal after processing through shaping filter is carried out amplitude adjustment and control output;
Error-correcting decoding module 28, it is connected with demodulation module 27, digital signal is carried out error-correcting decoding process, and obtains data message.
Of the present utility model, error correction coding module 21 is RS code error correction coding module.Error-correcting decoding module 28 is RS code error-correcting decoding module.Modulation module 22 is 8-Level CPFSK modulation module, GMSK modulation module.Demodulation module 27 is 8-Level CPFSK demodulation module, GMSK demodulation module.
Indirect modulation /demodulation number of the present utility model passes the radio station that device 2 structurally is independent of the standard model, bends in the third party equipment is provided, and the traffic radio station can be expanded to number/words dual mode radio in function when being used with common traffic radio station.Use at ultrashort wave traffic radio station 1 Function Extension, or the built fields such as ultrashort wave traffic network function upgrading have explicit costs comparison advantage.
Indirect modulation /demodulation number of the present utility model passes device 2, and it is arranged between data terminal 3 and the ultrashort wave traffic radio station 1.Modulation /demodulation number biography device 2 is connected by the data terminal of standardized RS232/RS485 serial line interface standard and customer service application indirectly.Be connected to the audio-frequency module 11 in ultrashort wave traffic radio station 1 by ultrashort wave traffic radio station 1 outside line audio interface, this interface adopts multi-thread cable connected mode, wherein comprised audio signal and received line, audio signal transmission line, GND signal ground line, PTT transmission control line, VCC direct current supply line, GND power ground line, be used for carrying out the I/O of audio base-band modulation signal and provide the operation of this device required direct current power supply.
The main hardware circuit platform that indirect modulation /demodulation number of the present utility model passes device 2 comprises, as shown in Figure 3:
High performance 16 fixed DSP digital signal processing chips, arithmetic speed is more than 80MIPS.
8 AVR MCU microcontrollers are used for realizing that PTT sends control, intermodule various types of communication agreement.Based on the high efficiency C CompilerTools of AVR, this device has good structural and maintainable.AVR MCU is supported in sequence of threads and upgrades, and these characteristics are supported the field upgrade of this device hardware system program.
The ware circuit of the utility model device has adopted universal modem hardware platform, and all modulation /demodulation all realizes in the mode of module.Based on this hardware system platform, can realize 8-Level CPFSK, GMSK or other number of types tone of Chinese characters modulation demodulation system, the system upgrade of being convenient to realize or Function Extension at same hardware platform.
The utility model at first is modulated into audio baseband signal with digital information, the voice channel that this audio base-band modulation signal is imported ultrashort wave traffic radio station 1 is again broadcast, and ultrashort wave traffic radio station 1 is expanded to have the ultrashort wave wireless data sending application system of the present utility model of number/words dual mode communication ability.Ultrashort wave wireless data sending application system has inclusion relation for former traffic radio station, do not change former broadcasting station structure, function and signal processing, just increased on its basis independently indirect modulation /demodulation number biography device 2 newly, and realized that by former radio station outside line audio interface the signal adaptation between the two connects.The utility model provides a kind of Implementation Technology that uses ultrashort wave traffic radio station 1 to realize data/speech dual-transfer mode; the simple function ultrashort wave traffic radio station 1 huge for present quantity on hand provides a kind of effective way of carrying out function upgrading, application extension; the unfavorable situation of having avoided this type of radio station to be left unused, waste has effectively been protected the existing equipment investment.Relatively adopt number/words bimodulus ultrashort wave traffic radio station of newly purchasing of reactance modulation system to carry out the application system structure, the utility model device has obvious comparison advantage at construction cost, engineering construction, operation maintenance, Function Extension/Fang Qu such as upgrading flexibility.
Ultrashort wave wireless data sending application system of the present utility model as shown in Figure 1, comprising: ultrashort wave traffic radio station 1, indirect modulation /demodulation number pass device 2 and data module 3.
Ultrashort wave traffic radio station 1, it is connected with indirect modulation /demodulation number biography device 2, is used for modulation and sends radiofrequency signal and reception ultrashort wave signal; Ultrashort wave traffic radio station 1 is standard type radio station commonly used in the prior art, for example radio station.
Of the present utility model, ultrashort wave traffic radio station 1 comprises:
Audio-frequency module 11, it passes device 2 with indirect modulation /demodulation number and is connected, the audio base-band modulation signal is carried out audio signal filtering and amplitude amplification processing, and realize routing switching, the PTT control signal logical process of outside line audio frequency and radio station microphone audio frequency and generate the radio station complete machine launching keying signal;
Radio-frequency module 13, it is connected with ifd module 12, is used for mixing and excitation modulated intermediate frequency signal, obtains radiofrequency signal;
Transmit-receive switch and antenna 14, it is connected with radio-frequency module 13, is used for regulating the reiving/transmitting state in ultrashort wave traffic radio station 1, realizes sending radiofrequency signal or receives the ultrashort wave signal.
Indirect modulation system of the present utility model is relatively directly modulation.Generally speaking, intermediate frequency Modulation (i.e. directly modulation) is generally adopted in the analog or digital communication service in ultrashort wave traffic radio station 1, with middle frequency sine-wave as carrier wave, the direct centering frequency sine-wave of modulation signal is modulated, modulated intermediate-freuqncy signal is transformed into emission of radio frequency signals after mixing, this process China National Instruments Import ﹠ Export Corporation relates to the primary modulation process.The analog intermediate frequency modulation classification is adopted in the audio signal modulation in common ultrashort wave traffic radio station 1, such as modulating FM, amplitude modulation AM, single-side belt SSB etc.; The digital system intermediate frequency Modulation is adopted in the data message modulation in the ultrashort wave number of novel standard/dual-purpose radio station of words, and such as FSK, PSK etc., all bend in direct modulation type in above-mentioned common traffic radio station and the dual-purpose radio station of number/words.
When the utility model adopts indirect modulation system, at first with the sine wave of low base band frequency as carrier wave, 22 pairs of base band sine waves of modulation module are modulated, and generate the base band tonal signal; By the base band modulated signal as modulation signal, sine wave by 12 pairs of IF-FRE of ifd module carries out intermediate frequency Modulation again, obtain modulated intermediate frequency signal, modulated intermediate frequency signal forms emission of radio frequency signals after the mixing conversion, related to twice modulated process in this process, therefore modulation claims again secondary modulation indirectly.
Indirect modulation /demodulation number of the present utility model passes device 2, can be divided into secondary modulation and secondary demodulation according to function is different with signal processing flow.The utility model adopts identical DSP Digital Signal Processing and MCU microcontroller integrated circuit (IC) platform when realizing secondary modulation with secondary demodulation, realized the corresponding signal processing capacity by different modules.
The shell of the indirect modulation /demodulation number biography of the utility model device 2 is the cuboid of 119*100*36mm, is arranged on the base of 149*100mm.Be provided with four on the base and install and fix a little, be used for fixing indirect modulation /demodulation number and pass device 2, as shown in Figure 7.
As shown in Figure 8, the rear casing panel that the indirect modulation /demodulation number of the utility model passes device 2 has standard type EIARS-232C asynchronous serial communication interface (also optional RS485 interface), interface device is DB-9F, and standard type RJ45 socket, be connected with ultrashort wave radio set 1 external circuit audio interface in order to realization.Standard type RJ45 socket is positioned on the rear board of indirect modulation /demodulation number biography device 2, and channel lines adopts the grid line of standard.The color of interface line is as follows successively from left to right with definition in the network line interface: 1. white: the GND ground wire; 2. grey: VCC (DC 9V～24V); 3. black: GND signal ground; 4. red: the RXAUD+ audio frequency receives (installing to this from the radio station); 6. yellow: the TXAUD+ audio frequency sends (from this device to the radio station); 8. brown: the control of PTT+ radio station is sent out, as shown in Figure 9.
The signal transmission flow of the utility model ultrashort wave wireless data sending application system is:
Next step is sent to modulation module 22 digital information flow after the RS error correction coding is processed, finishes digital information to the sign map process of audio base-band modulation signal.Continuous phase frequency shift keying CPFSK can avoid the discontinuous high fdrequency component that causes because of phase place, and the Bandwidth-Constrained channel is had good adaptive capacity, is widely adopted at digital communicating field.8-Level CPFSK Digital Modulation is a kind of high-order modulating, and each symbol waveform has comprised the data content of 3bit, can support this device to realize the ultrashort wave message transmission rate up to 19.2kbps.
Contain a large amount of higher harmonic components through the baseband modulation waveform after the processing of modulation module 22 sign map, and ultrashort wave traffic radio station 1 allows the bandwidth of input audio signal generally below 10k, emission filter module 23 is at first carried out molding filtration to the baseband modulation waveform, its baseband waveform bandwidth is controlled at the allowed band in ultrashort wave traffic radio station 1.The emission filter module 23 that the utility model adopts is the raised cosine low pass filter, and its definition is seen shown in the following formula (I):
Wherein, b=0.2, T are the time width of code element, i.e. T=1/symbol rate.
The ultrashort wave traffic radio station 1 general half-duplex mode that adopts, signal transmitting and receiving is positioned at same frequency range, starts emission switch by the PTT button during signal demand emission, and talk-through discharges the PPT button and then recovers the channel-monitoring accepting state in ultrashort wave traffic radio station 1.Indirect modulation /demodulation number of the present utility model passes device 2 and is controlled by MCU, according to whether having outgoing data automatically to control transmit-receive switch and antenna 14, and the amplitude adjustment of enforcement audio base-band modulation signal, afterwards signal is sent to the audio-frequency module 11 in ultrashort wave traffic radio station 1, finishes this device Multi-modulation signal handling process.The audio base-band modulation signal that is directed into the radio station traffic channel will be by broadcasting to the spacing wireless channel after the conversion process such as ultrashort wave traffic radio station 1 internal implementation intermediate frequency Modulation, RF excited.
The signal of the utility model ultrashort wave wireless data sending application system receives flow process:
Do not have in the traffic call situation, ultrashort wave traffic radio station 1 generally is in the channel-monitoring accepting state.The ultrashort wave signal that 12 pairs of ifd modules receive carries out intermediate frequency demodulation, obtains the audio base-band modulation signal.For any audio base-band modulation signal on certain specific frequency, because the opening of wireless channel, all monitor the radio station can both carry out electric wave reception.For the indirect modulation wireless data sending application that the utility model relates to, ultrashort wave traffic radio station 1 terminal that only has the utility model demodulation module 27 could realize that correct demodulation, decoding receive; For other ultrashort wave traffic radio station 1, received signal then shows as audio-frequency noise information.
The utility model device receives the audio base-band modulation signal from audio-frequency module 11 outputs in ultrashort wave traffic radio station 1, at first carries out the gain control of gain control module 25 and processes, and the audio base-band modulation signal that receives is adjusted to appropriate level; Carry out the clutter filtering by receiving filter module 26 again, be sent to afterwards demodulation module 27 and carry out demodulation process, data are reverted to binary digital information; Carry out correction process by error-correcting decoding module 28 at last, the output data message is sent to data module 3 through the RS232/RS485 interface, finishes the secondary demodulation signal reception ﹠ disposal process of this device.
The front casing panel that the indirect modulation /demodulation number of the utility model passes device 2 is provided with the PWR power supply indicator, Syn receives synchro light, Rx DP192E MODEM reception radio signals indicator light, Tx DP192E MODEM to the exchanges data indicator light between radio station transmitted signal indicator light, RD/TD computer and the DP192E MODEM, as shown in Figure 6.Above-mentioned indicator light provides indication when ultrashort wave wireless data sending application system is moved, so that the ruuning situation of supervisory control system and wrong investigation.
Embodiment 1:
Present embodiment is the receiving/transmission method of ultrashort wave wireless data sending application system.The indirect modulation /demodulation number of the utility model passes device 2 as a kind of digital information processing and signal-conversion equipment, cooperates with ultrashort wave traffic radio station 1, data module 3, jointly forms ultrashort wave wireless data sending application system.
In the present embodiment, the audio-frequency module 11 with plain edition ultrashort wave traffic radio station 1 of single traffic function has disposed microphone hand tenon and boombox, is used for realizing traffic call and monitoring; Also dispose simultaneously the outside audio interface that connects, in order to realize the outer audio equipment expansion.This outside audio interface that connects adopts multi-thread cable to connect, wherein comprise audio signal and received line, audio signal transmission line, GND signal ground line, PTT transmission control line, DC power line, GND power ground line, be respectively applied to carry out modulating baseband signal I/O, PTT transmitting-receiving control and the supply of external function module power supply.The indirect modulation /demodulation number of the utility model passes device 2 and realizes physical connections with ultrashort wave traffic radio station 1 by this outside audio interface that connects, and finishes the concrete functions such as transmitting-receiving control in the output of audio base-band modulation signal and output, ultrashort wave traffic radio station 1.Data module 3 is the remote application client of subscriber service system, exists as information source or the stay of two nights in whole communication system consists of.The indirect modulation /demodulation number of the utility model passes device 2 and adopts RS232/RS485 serial line interface standard to be connected with data module 3, the RS232/RS485 interface is one of most widely used Standardization Communication interface of present Various types of data terminal equipment, adopts this interface to be conducive to promote compatibility of the present utility model and ease for use.
The utility model ultrashort wave wireless data sending application system can be divided into based on the transmitted signal mode of secondary modulation with based on the signal reception mode of secondary demodulation according to functions of modules is different with signal processing flow.
The signal processing flow of the transmitted signal mode of the utility model ultrashort wave wireless data sending application system is:
Step 1: data module 3 is delivered to the error correction coding module 21 that indirect modulation /demodulation number passes device 2 with data message stream to be sent by the RS232/RS485 serial line interface, carries out the channel error correction coding and processes;
Step 2: the data message stream after error correction coding module 21 is processed is sent to modulation module 22 by internal bus, finishes digital signal to the sign map of audio baseband signal and processes;
Step 3: 23 pairs of baseband modulation signals of emission filter module carry out molding filtration to be processed, its low-frequency filter characteristics filtering the higher harmonic components in the baseband modulation waveform, its baseband waveform bandwidth is controlled at the allowed band in ultrashort wave traffic radio station 1;
Step 4: wave-shape amplitude adjustment and emission switch control module 24 are carried out the wave amplitude output intensity adjustment of baseband modulation signal according to ultrashort wave traffic radio station 1 for input audio signal gain facilities, and start the audio-frequency signal processing module 11 that the PTT emission switch carries out signal output ultrashort wave traffic radio station 1 in detecting wireless channel idle situation;
Step 5: ultrashort wave traffic radio station 1 is carried out standardization with the baseband modulation signal of input as traffic call, is sent to the spacing wireless channel by transmit-receive switch and antenna 14 after processing is amplified in intermediate frequency Modulation, radio-frequency module 13 frequency conversions and the excitation of ifd module 12.
The signal processing flow of the signal reception mode of the utility model ultrashort wave wireless data sending application system is:
Step 1: under professional call case, ultrashort wave traffic radio station 1 is in channel-monitoring, accepting state.When ultrashort wave traffic radio station 1 receives normal traffic call, carry out the traffic reception ﹠ disposal according to existing standardization program; When receiving signal and be data-signal, the indirect modulation /demodulation number of the utility model passes 2 pairs of audio base-band modulation signals from ultrashort wave traffic radio station 1 external audio connection line of device and starts demodulating processes;
Step 2: 26 pairs of baseband modulation signals that receive of gain control module 25 and receiving filter module carry out the wave-shape amplitude adjustment and filter shape is processed;
Step 3: 27 pairs of gain control module 25 of demodulation module and receiving filter module 26 pretreated baseband modulation signals carry out demodulation process, recover binary digital information stream;
Step 4: owing to comprised possible signal errors, 28 pairs of above-mentioned binary digital information streams of error-correcting decoding module are processed, and adjudicate, further recover the primary data information (pdi) of former data terminal module output according to the redundant bit information decoding that wherein comprises;
Step 5: the data receiver information exchange after the indirect modulation /demodulation number biography of the utility model device 2 will be processed is crossed the RS232/RS485 serial line interface and is transferred to data module 3, thereby finishes whole data information transfer process.
Embodiment 2:
Certain fishery has many marine fishing operation fishing boats, because the shoal of fish is mobile by force, there is dispute in neighbour's national marine line of demarcation or it is clear not yet to define, fishing boat and operating personnel are often harassed or arrest button to be imposed a fine by other country, causes casualties and property loss.Fishery intends reinforcement to the remote monitoring and administration of fishing boat operation on the sea, obtains the data messages such as fishing boat real time position, meteorological condition and equipment running status, and assigns accordingly supervisory instruction.On the fishing boat at present standard configuration be used for the plain edition ultrashort wave traffic radio station 1 of daily contact and distress call purposes; adopt the utility model that function upgrading is carried out in former ultrashort wave traffic radio station 1; built up the ultrashort wave wireless data sending application system that satisfies the requirement of above-mentioned fishing boat remote supervisory, and engineering construction have the cycle fast, cost is low, do not change the model in original ultrashort wave traffic radio station 1 and the remarkable advantage such as antenna equipment, the existing investment that adequately protects out of my cabin.
Fig. 4 is that the utility model device is at the system framework schematic diagram of the embodiment in seagoing fishing vessel remote supervisory field.As shown in Figure 4, a management main station system A is arranged in ultrashort wave traffic radio station 1 data transmission system of present embodiment, pass device 2, system monitoring supervisory computer etc. comprising plain edition ultrashort wave traffic radio station 1 and attached base station antenna in the wrong, the indirect modulation /demodulation number of the utility model.As shown in Figure 4, the ultrashort wave wireless data sending application system of present embodiment also comprises some far-end substation systems that are positioned on the ocean operation fishing boat, such as far-end substation B, far-end substation C, far-end substation D, wherein each far-end substation system has comprised plain edition ultrashort wave traffic radio station 1, the indirect modulation /demodulation number of the utility model passes device 2, data module 3.
In the present embodiment, management main station system A receives the operation fishing boat operation information from the far-end substation, and feeds back as the case may be the fishing boat job instruction; Far-end substation B, C, D send the fishing boat operation information to the A of system management main website, and accept the supervisory instruction of main station system A.
When fishing boat is carried out the operation on the sea task, the data module 3 of far-end substation B, C, D receives the data message that all types of boat-carrying electronic equipments provide, such as Current GPS coordinate, course, wind speed, shoal of fish resource detection information, powerplant module operation information etc., with this information according to certain prescribed manner gather, format conversion processing, and periodically this information is delivered to indirect modulation /demodulation number biography device 2, broadcast to the spacing wireless channel through ultrashort wave traffic radio station 1.Management main station system A receives from the above-mentioned information of operation on the sea fishing boat and monitors, assesses, simultaneously with reference to the risk information of the relevant governability structures such as fish-farming operation, maritime affairs, meteorology about the marine site, place, find to exist when being not suitable for some factor of fishing operation, in time with traffic urgent call or data command form caution operation fishing boat or the disposal instruction of being correlated with.
By the utility model application of installation, above-mentioned fishery on 1 system-based of original ultrashort wave traffic radio station Rapid Implementation the remote automation supervision number of operation on the sea fishing boat pass on Gong and can upgrade, brought into play the practical function effect for guarantee operation on the sea personnel's life and property safety.Simultaneously, relatively adopt buy novel several words dual mode radio networking mode, the utility model application of installation has that cost is low, easy to operate, the obvious comparison advantage such as the existing investment of protection.
Protection content of the present utility model is not limited to above embodiment.Under the spirit and scope that do not deviate from the utility model design, variation and advantage that those skilled in the art can expect all are included in the utility model, and take appending claims as protection range.
Claims (7)
1. an indirect modulation /demodulation number passes device, it is characterized in that, comprising:
Error correction coding module (21);
Modulation module (22), it is connected with described error correction coding module (21);
Emission filter module (23), it is connected with described modulation module (22);
Wave-shape amplitude is adjusted and emission switch control module (24), and it is connected with described emission filter module (23);
Gain control module (25);
Receiving filter module (26), it is connected with described gain control module (25);
Demodulation module (27), it is connected with described receiving filter module (26);
Error-correcting decoding module (28), it is connected with described demodulation module (27).
2. indirect modulation /demodulation number passes device as claimed in claim 1, it is characterized in that described error correction coding module (21) is RS error correction coding module.
3. indirect modulation /demodulation number passes device as claimed in claim 1, it is characterized in that described error-correcting decoding module (28) is RS error-correcting decoding module.
4. indirect modulation /demodulation number passes device as claimed in claim 1, it is characterized in that described modulation module (22) is 8-Level CPFSK modulation module, GMSK modulation module.
5. indirect modulation /demodulation number passes device as claimed in claim 1, it is characterized in that described demodulation module (27) is 8-Level CPFSK demodulation module, GMSK demodulation module.
6. an indirect modulation /demodulation number passes the application system of device, it is characterized in that, comprising: ultrashort wave traffic radio station (1), pass device (2) and data module (3) such as each described indirect modulation /demodulation number of claim 1-5;
Described ultrashort wave traffic radio station (1), it passes device (2) with described indirect modulation /demodulation number and is connected;
Described data module (3), it passes device (2) with described indirect modulation /demodulation number and is connected.
As claimed in claim 6 indirectly the modulation /demodulation number pass the application system of device, it is characterized in that described ultrashort wave traffic radio station (1) comprising:
Audio-frequency module (11), it passes device with described indirect modulation /demodulation number and is connected, described audio base-band modulation signal is carried out audio signal filtering and amplitude amplification processing, and realize routing switching, the PTT control signal logical process of outside line audio frequency and radio station microphone audio frequency and generate the radio station complete machine launching keying signal;
Ifd module (12), it is connected with described audio-frequency module (11);
Radio-frequency module (13), it is connected with described ifd module (12);
Transmit-receive switch and antenna (14), it is connected with radio-frequency module (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220423056 CN202818322U (en) | 2012-08-23 | 2012-08-23 | Indirect modulation-demodulation data transmission device and application system thereof |
Applications Claiming Priority (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743535A (en) * | 2016-04-18 | 2016-07-06 | 四川九洲空管科技有限责任公司 | Anti-interference communication module for short wave radio station |
| CN107359950A (en) * | 2017-06-23 | 2017-11-17 | 四川海猫通信科技股份有限公司 | The audio adaptation apparatus and its adaptation method of a kind of radio station |
| CN107425931A (en) * | 2017-07-19 | 2017-12-01 | 甜旅（上海）财务咨询有限公司 | The audio adaptation apparatus and its adaptation method of a kind of radio station |
-
2012
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743535A (en) * | 2016-04-18 | 2016-07-06 | 四川九洲空管科技有限责任公司 | Anti-interference communication module for short wave radio station |
| CN105743535B (en) * | 2016-04-18 | 2018-05-15 | 四川九洲空管科技有限责任公司 | A kind of antijam communication module for short-wave radio set |
| CN107359950A (en) * | 2017-06-23 | 2017-11-17 | 四川海猫通信科技股份有限公司 | The audio adaptation apparatus and its adaptation method of a kind of radio station |
| CN107425931A (en) * | 2017-07-19 | 2017-12-01 | 甜旅（上海）财务咨询有限公司 | The audio adaptation apparatus and its adaptation method of a kind of radio station |
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