CN202513929U - Code division multiple access satellite communication terminal - Google Patents
Code division multiple access satellite communication terminal Download PDFInfo
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- CN202513929U CN202513929U CN2011205757113U CN201120575711U CN202513929U CN 202513929 U CN202513929 U CN 202513929U CN 2011205757113 U CN2011205757113 U CN 2011205757113U CN 201120575711 U CN201120575711 U CN 201120575711U CN 202513929 U CN202513929 U CN 202513929U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a code division multiple access (CDMA) satellite communication terminal and relates to a CDMA-based communication device in the satellite communication field. The CDMA satellite communication terminal comprises a monitoring unit, an intermediate frequency modulation and demodulation unit, a baseband modulation and demodulation unit, an access control unit, and a power supply and the like. On the basis of cooperated working of all the units inside the terminal, transmission of services of voices, faxes and data and the like in a CDMA mode is realized. According to the utility model, the provided CDMA satellite communication terminal has characteristics of full functions, high integrated level, stable and reliable performances, light weight, low power consumption and simple structure and the like; and the whole circuit equipment is integrated into a standard 2U drawer with the depth of 480mm. The provided terminal is especially suitable for serving as a CDMA communication terminal in a satellite communication system.
Description
Technical field
The utility model relates to a kind of code division multiple access (the being called for short CDMA) satellite communication terminal in the satellite communication field, is specially adapted to the satellite communication terminal that inserts as code division multiple access mode Channel Transmission support fax, speech and data service in the satellite communication system.
Background technology
Code division multiple access (CDMA) satellite communication system adopts DSSS (DSSS) technology; Have good disguise and anti-interference, the anti-performance of intercepting and capturing; In the satellite communication field prospect that has a very wide range of applications, but how to realize that the transmission of flexible networking and low rate facsimile service is the technical barrier in the CDMA satellite communication system.
The utility model content
The purpose of the utility model is to avoid the weak point in the above-mentioned background technology and the code division multiple access satellite communication terminal that provides, and it can realize that through binary channels modulation module and access control module the networking at terminal is transmitted with professional.The utility model also has characteristics such as integrated degree is high, stable and reliable for performance, in light weight, low in energy consumption, simple in structure.
The purpose of the utility model is achieved in that it comprises monitoring unit 1, IF Modulation demodulating unit 3, power supply 5, voice module 7, data module 8, binary channels baseband modulation and demodulation module 4, access control module 2 and fax module 6; Wherein IF Modulation demodulating unit 3 goes out to hold 4 pin to be connected with outside L frequency range medium frequency output end mouth A; IF Modulation demodulating unit 3 is gone into end 5 pin and is connected with outside L frequency range intermediate frequency input port B; IF Modulation demodulating unit 3 is gone into end 3 pin and is gone out to hold 3 pin to link to each other through data wire and monitoring unit 1; Intermediate frequency unit 3 is gone into end 1 pin and is gone out to hold 2 pin to be connected with binary channels baseband modulation and demodulation module 4, and intermediate frequency unit 3 goes out end 2 pin and binary channels baseband modulation and demodulation module 4 goes into to hold 3 pin to be connected; Binary channels baseband modulation and demodulation module 4 is gone into end 1 pin and is gone out to hold 1 pin to be connected with monitoring unit 1; Binary channels baseband modulation and demodulation module 4 goes out end 4 pin and goes into to hold 3 pin to be connected with access control module 2, and binary channels baseband modulation and demodulation module 4 goes into end 5 pin and access control module 2 goes out to hold 2 pin to be connected; Access control module 2 is gone into end 1 pin and is gone out to hold 2 pin to be connected with monitoring unit 1; Access control module 2 is gone into end 4 pin and is gone out to hold 1 pin to be connected with fax module 6; Access control module 2 goes out to hold 5 pin and fax module 6 to go into to hold 2 pin to be connected, and access control module 2 goes into end 6 pin and voice module 7 goes out to hold 1 pin to be connected, and access control module 2 goes out end 7 pin and voice module 7 goes into to hold 2 pin to be connected; Access control module 2 is gone into end 8 pin and is gone out to hold 1 pin to be connected with data module 8; Access control module 2 goes out end 9 pin and goes into to hold 2 pin to be connected with data module 8, and fax module 6 goes into end 3 pin and outside fax port C is connected, and voice module 7 is gone into end 3 pin and is connected with outside voice port D; Data module 8 is gone into end 3 pin and is connected with external data port E, power supply 5 go out end+V1 ,+V2 ,+V3 ,-the corresponding power end of V4 voltage end and connecing with each parts;
The code division multiple access satellite communication terminal is when sending data; Analog facsimile signal entering fax module 6 is encoded, framing forms the digital fax signal and sends access control module 2 to; Analogue voice signal entering voice module 7 is encoded, framing forms digital voice signal and sends access control module 2 to; Asynchronous data gets into data module 8 and handles and form the asynchronous data transfer that meets the terminal interface standard and give access control module 2; 2 pairs of digital signals from fax module 6, voice module 7, fax module 6, data module 8 of access control module are carried out framing control, signaling process and are sent processed data stream to binary channels baseband modulation and demodulation module 4; 4 pairs of binary channels baseband modulation and demodulation modules insert control module 2 processed data stream and carry out chnnel coding, spread spectrum, shaping filter and form baseband modulation signal and send IF Modulation demodulating unit 3 to; IF Modulation demodulating unit 3 carries out frequency spectrum shift with the baseband modulation signal that receives, and bandpass filtering forms the intermediate-freuqncy signal of L frequency range and exports; When receiving data; The L frequency range intermediate-freuqncy signal that 3 pairs of IF Modulation demodulating units receive is carried out intermediate frequency amplification, bandpass filtering, intermediate frequency demodulation, LPF and is formed analog baseband signal and pass to binary channels baseband modulation and demodulation module 4; 4 pairs of analog baseband signals that receive of binary channels baseband modulation and demodulation module carry out the data flow that A/D conversion, despread-and-demodulation, channel decoding recover and send access control module 2 to; 2 pairs of data flow that receive of access control module are separated frame and are handled; Form digital voice signal, digital fax signal or asynchronous data and send fax module 6, voice module 7, data module 8 respectively to; The digital fax signal that 6 pairs of fax modules receive is decoded and is reverted to analog facsimile signal and analog facsimile signal is exported; 7 pairs of digital voice signals that receive of voice module are decoded and are reverted to analogue voice signal and analogue voice signal is exported; Data module 8 is handled the asynchronous data that receives, and the asynchronous data after handling is exported; When terminal operating, monitoring unit 1 is sent to the control that access control module 2, IF Modulation demodulating unit 3, binary channels baseband modulation and demodulation module 4 realizes the terminal respectively with pilot signal.
Wherein, The utility model binary channels baseband modulation and demodulation module 4 is made up of transmission data selector 9, channel encoder 10, spread spectrum modulator 11, base band shaping filter circuit 12, analog to digital converter 13, webmaster channel low-converter 14, the relevant despreader 15 of webmaster channel, webmaster channel carrier recovery circuit 16, webmaster channel decoder 17, Traffic Channel low-converter 18, the relevant despreader 19 of Traffic Channel, traffic channel carrier restore circuit 20, Traffic Channel decoder 21; Wherein sending data selector 9 goes into to hold 1 pin and access control module 2 to go out to hold 2 pin to be connected; Sending data selector 9 goes out to hold 2 pin and channel encoder 10 to go into to hold 1 pin to be connected; Channel encoder 10 goes out end 2 pin and goes into to hold 1 pin to be connected with spread spectrum modulator 11; Spread spectrum modulator 11 goes out end 2 pin and goes into to hold 1 pin to be connected with base band shaping filter circuit 12, and base band shaping filter circuit 12 goes out end 2 pin and IF Modulation demodulating unit 3 goes into to hold 1 pin to be connected; Analog to digital converter 13 is gone into end 2 pin and is gone out to hold 2 pin to be connected with IF Modulation demodulating unit 3; Analog to digital converter 13 goes out end 1 pin and goes into to hold 2 pin to be connected with webmaster channel low-converter 14; Webmaster channel low-converter 14 goes out the relevant despreader 15 with the webmaster channel of end 1 pin and goes into the connection of end 2 pin; The relevant despreader 15 of webmaster channel goes out end 1 pin and goes into to hold 2 pin to be connected with webmaster channel carrier recovery circuit 16; Webmaster channel carrier recovery circuit 16 goes out end 1 pin and goes into to hold 2 pin to be connected with webmaster channel decoder 17; Webmaster channel decoder 17 goes out end 1 pin and goes into to hold 3 pin to be connected with access control module 2, and webmaster channel low-converter 14 goes out to hold 3 pin and Traffic Channel low-converter 18 to go into to hold 3 pin to be connected simultaneously, and Traffic Channel low-converter 18 is gone into end 2 pin and gone out to hold 1 pin to be connected with analog to digital converter 13; Traffic Channel low-converter 18 goes out the relevant despreader 19 with Traffic Channel of end 1 pin and goes into the connection of end 2 pin; The relevant despreader 19 of Traffic Channel goes out to hold 1 pin and traffic channel carrier restore circuit 20 to go into to hold 2 pin to be connected, and traffic channel carrier restore circuit 20 goes out end 1 pin and Traffic Channel decoder 21 goes into to hold 2 pin to be connected, and Traffic Channel decoder 21 goes out end 1 pin and goes into to hold 3 pin to be connected with access control module 2; Send data selector 9; Channel encoder 10; Spread spectrum modulator 11; Base band shaping filter circuit 12; Analog to digital converter 13; Webmaster channel low-converter 14; The webmaster channel despreader 15 of being correlated with; Webmaster channel carrier recovery circuit 16; Webmaster channel decoder 17; Traffic Channel low-converter 18; The Traffic Channel despreader 19 of being correlated with; Traffic channel carrier restore circuit 20; Traffic Channel decoder 21 is respectively gone into end 4 pin and is gone out end+V1 power end with power supply 5 and be connected; Respectively going into end 5 pin is connected with the ground end.
Binary channels baseband modulation and demodulation module 4 is sent in the data procedures; Send 9 pairs of business datums that receive of data selector and network management data is selected and will select after data be sent to channel encoder 10; The data that data after 10 pairs of selections of channel encoder will be carried out after the channel error correction coding also will be encoded are sent to spread spectrum modulator 11; Data behind 11 pairs of codings of spread spectrum modulator are carried out band spectrum modulation and the data behind the spread spectrum are sent to base band shaping filter circuit 12; Signal after 12 pairs of band spectrum modulation of base band shaping filter circuit forms filtering, and filtered data are sent into IF Modulation demodulating unit 3; In the network management data receiving course; Analog to digital converter 13 converts the ABB network management data that receives the digital baseband network management data to and is sent to webmaster channel low-converter 14; Data after webmaster channel low-converter 14 also will be handled the frequency spectrum shift of digital baseband network management data to zero intermediate frequency are sent to the relevant despreader 15 of webmaster channel; The relevant despreader 15 of webmaster channel carries out the data after the down-converted despreading and the data after the despreading is sent to webmaster channel carrier recovery circuit 16; Data after 16 pairs of despreadings of webmaster channel carrier recovery circuit are carried out the frequency deviation correction and the revised data of frequency deviation are sent to webmaster channel decoder 17; 17 pairs of revised data of frequency deviation of webmaster channel decoder are deciphered, and the network management data after will deciphering is sent into access control unit 2; In the business datum receiving course; Analog to digital converter 13 converts the ABB business datum that receives the digital baseband business datum to and is sent to Traffic Channel low-converter 18; Data after Traffic Channel low-converter 18 also will be handled the frequency spectrum shift of digital baseband business datum to zero intermediate frequency are sent to the relevant despreader 19 of Traffic Channel; The relevant despreader 19 of Traffic Channel carries out the data after the down-converted despreading and the data after the despreading is sent to traffic channel carrier restore circuit 20; Data after 20 pairs of despreadings of traffic channel carrier restore circuit are carried out the frequency deviation correction and the revised data of frequency deviation are sent to Traffic Channel decoder 21; 21 pairs of revised data of frequency deviation of Traffic Channel decoder are deciphered, and the business datum after will deciphering is sent into access control unit 2.
Wherein, The utility model access control module 2 is by call controller 22; Network management information framing circuit 23, HDLC transmitter 24, transmission data selector 25, network management information are separated frame circuit 26, HDLC receiver 27, are received data detector 28 compositions; Wherein call controller 22 goes into to hold 1 pin and voice module 6 to go out to hold 1 pin to be connected; Call controller 22 goes out to hold 2 pin and voice module 6 to go into to hold 2 pin to be connected, and end 3 pin gone into by call controller 22 and fax module 7 goes out to hold 1 pin to be connected, and call controller 22 goes out end 4 pin and fax module 7 goes into to hold 2 pin to be connected; Call controller 22 is gone into end 5 pin and is gone out to hold 1 pin to be connected with data module 8; Call controller 22 goes out end 6 pin and goes into to hold 2 pin to be connected with data module 8, and call controller 22 goes into to hold 7 pin and receive data detector 28 to go out to hold 3 pin to be connected, and call controller 22 goes out end 8 pin and goes into to hold 3 pin to be connected with transmission data selector 25; Call controller 22 is gone into end 9 pin and is separated frame circuit 26 with network management information and go out to hold 1 pin to be connected; Call controller 22 goes out to hold 10 pin and network management information framing circuit 23 to go into to hold 1 pin to be connected, and network management information framing circuit 23 goes out end 2 pin and HDLC transmitter 24 goes into to hold 1 pin to be connected, and HDLC transmitter 24 goes out end 2 pin and transmission data selector 25 goes into to hold 1 pin to be connected; Sending data selector 25 goes out to hold 2 pin and binary channels baseband modulation and demodulation module 4 to go into to hold 5 pin to be connected; Network management information is separated frame circuit 26 and is gone into to hold 2 pin and HDLC receiver 27 to go out to hold 1 pin to be connected, and HDLC receiver 27 goes into to hold 2 pin and receive data detector 28 to go out to hold 1 pin to be connected, and reception data detector 28 goes into to hold 2 pin and binary channels baseband modulation and demodulation module 4 to go out to hold 4 pin to be connected; Call controller 22, sends data selector 25, network management information and separates frame circuit 26, HDLC receiver 27, receives data detector 28 and respectively go into end 11 pin and power supply 5 and go out end+V1 power end and be connected, respectively go into to hold 12 pin to hold with ground to be connected network management information framing circuit 23, HDLC transmitter 24.
The utility model fax module 6 is made up of user interface circuit 29, PCM encoder 30, facsimile coding circuit 31, facsimile data framer 32, facsimile data deframer 33, fax decoder circuit 34, PCM decoder 35.Wherein user interface circuit 29 goes into to hold 1 pin to be connected with outside fax port C; User interface circuit 29 goes out end 2 pin and is connected with outside fax port C; User interface circuit 29 goes out end 3 pin and goes into to hold 1 pin to be connected with PCM encoder 30; User interface circuit 29 goes into to hold 4 pin and PCM decoder 35 to go out to hold 1 pin to be connected, and PCM encoder 30 goes out end 2 pin and facsimile coding circuit 31 goes into to hold 1 pin to be connected, and facsimile coding circuit 31 goes out end 2 pin and facsimile data framer 32 goes into to hold 1 pin to be connected; Facsimile data framer 32 goes out end 2 pin and goes into to hold 4 pin to be connected with access control module 2; Access control module 2 goes out end 5 and goes into end 2 with facsimile data deframer 33 and is connected, and facsimile data deframer 33 goes out end 1 and goes into to hold 2 to be connected with fax decoder circuit 34, and fax decoder circuit 34 goes out to hold 1 to go into to hold 2 to be connected with PCM decoder 35.User interface circuit 29, PCM encoder 30, facsimile coding circuit 31, facsimile data framer 32, facsimile data deframer 33, fax decoder circuit 34, PCM decoder 35 are respectively gone into end 11 pin and power supply 5 and are gone out end+V1 power end and be connected, respectively go into to hold 12 pin to hold with ground to be connected.
When sending facsimile data; Outside facsimile signal is sent to PCM encoder 30 through user interface circuit 29, and PCM encoder 30 is encoded the facsimile signal that receives, and sends the PCM sign indicating number type data behind the coding to facsimile coding circuit 31; Facsimile coding circuit 31 is encoded PCM sign indicating number type data; And the data after will encoding are sent to facsimile data framer 32, and facsimile data framer 32 carries out framing with the data that receive, and sends the data behind the framing to access control module 2.When receiving faxes data; Facsimile data deframer 33 receives from the facsimile data of access control module 2 and separates frame; The data of separating behind the frame are sent to fax decoder circuit 34, and fax decoder circuit 34 is deciphered the data that receive, and the PCM sign indicating number type data that obtain after will deciphering are sent to PCM decoder 35; PCM decoder 35 is deciphered PCM sign indicating number type data, and the data after will deciphering are sent out the terminal through user interface circuit 29.
The utility model is compared with background technology has following advantage:
1. after the utility model adopts binary channels baseband modulation and demodulation module 4 and access control module 2, can realize the networking function of code division multiple access satellite communication terminal in the CDMA satellite communication system and professional transmission simultaneously.
2. after the utility model adopts fax module 6, can realize that the low speed facsimile service transmits in satellite channel.
3. the integrated degree of each parts of the utility model is high, and low in energy consumption, the machine debugging workload is little, and is stable and reliable for performance.
4. the utility model adopts the standard profile structure, and is simple in structure, and inner compact, cost is low, has application value.
Description of drawings
Fig. 1 is the functional-block diagram of the utility model.
Fig. 2 is the electrical schematic diagram of the utility model binary channels baseband modulation and demodulation module 4.
Fig. 3 is the electrical schematic diagram of the utility model access control module 2.
Fig. 4 is the electrical schematic diagram of the utility model fax module 6.
Embodiment
Referring to figs. 1 through Fig. 4; The utility model is made up of monitoring unit 1, IF Modulation demodulating unit 3, power supply 5, voice module 7, data module 8, binary channels baseband modulation and demodulation module 4, access control module 2, fax module 6; Fig. 1 is the functional-block diagram of the utility model, and embodiment presses Fig. 1 connection line.
Wherein monitoring unit 1 goes out end 1 pin and goes into to hold 1 pin to be connected with binary channels baseband modulation and demodulation module 4, is used to control the running parameters such as transceive data speed and spreading code of binary channels baseband modulation and demodulation module 4, and detects its operating states such as received signal to noise ratio.Monitoring unit 1 goes out end 2 pin and goes into to hold 1 pin to be connected with access control module 2, is used to control the running parameters such as serial ports operating rate and interface modes of access control module 2, and detects its operating state.Monitoring unit 1 goes out end 3 pin and is connected with end 3 pin of going into of IF Modulation demodulating unit 3, and the frequency change and the intermediate frequency that are used to control the transmitting-receiving local vibration source of IF Modulation demodulating unit 3 are exported the power level of signal, and detect its operating state.The effect of monitoring unit 1 is exactly an operate as normal of controlling the utility model through these controls and detection port, and embodiment adopts commercially available dedicated cpu integrated circuit C8051F340, large scale integrated circuit EPM570, application-specific integrated circuit (ASIC) MAX3232ESE, clock circuit SD2201DLPI, LCD WDG0006-TMI, button BMA-B-16-76 to make.
IF Modulation demodulating unit 3 is gone into end 1 pin and is gone out to hold 2 pin to be connected with binary channels baseband modulation and demodulation module 4; Its effect is that the baseband signal of binary channels baseband modulation and demodulation module 4 outputs is carried out IF Modulation; Intermediate frequency unit 3 goes out end 4 pin and is connected with L frequency range medium frequency output end mouth A, and its effect is that the intermediate-freuqncy signal after the IF Modulation is exported.Intermediate frequency unit 3 is gone into end 5 pin and is connected with outside L frequency range intermediate frequency input port B, and its effect is the intermediate-freuqncy signal that receives outside input, and the intermediate-freuqncy signal of input is carried out quadrature demodulation.Intermediate frequency unit 3 goes out end 2 pin and goes into to hold 3 pin to be connected with binary channels baseband modulation and demodulation module 4, and its effect is to send binary channels baseband modulation and demodulation module 4 to carry out base band demodulating the complex baseband signal behind intermediate frequency demodulation.Embodiment adopts special-purpose active modulation chip AD8349, active demodulation chip AD8348 to make.
The utility model binary channels baseband modulation and demodulation module 4 is made up of transmission data selector 9, channel encoder 10, spread spectrum modulator 11, base band shaping filter circuit 12, analog to digital converter 13, webmaster channel low-converter 14, the relevant despreader 15 of webmaster channel, webmaster channel carrier recovery circuit 16, webmaster channel decoder 17, Traffic Channel low-converter 18, the relevant despreader 19 of Traffic Channel, traffic channel carrier restore circuit 20, Traffic Channel decoder 21.The electric principle connection line of embodiment binary channels baseband modulation and demodulation module 4 is as shown in Figure 2.Wherein sending data selector 9 its effects is from webmaster channel data to be sent and traffic channel data, to select a circuit-switched data to carry out baseband modulation according to control signal to handle; Channel encoder 10 its effects are differential coding, convolutional encodings of accomplishing data; Spread spectrum modulator 11 its effects are band spectrum modulation of accomplishing coding back data; 12 its effects of base band shaping filter circuit are base band shaping, digital-to-analogue conversion and LPFs of the data behind the completion spread spectrum, and the embodiment digital-to-analogue conversion adopts D/A chip AD9709 making, LPF to adopt the LC filter to make.Analog to digital converter 13 its effects are that the baseband signal that intermediate frequency demodulation gets off is carried out analog-to-digital conversion; Is analog-signal transitions digital signal; Embodiment adopts A/D chip AD9288 to make; 14 its effects of webmaster channel low-converter are that the webmaster signal that receives is carried out the orthogonal digital down-conversion; Relevant despreader 15 its effects of webmaster channel are the webmaster spread-spectrum signal to be carried out despreading handle; 16 its effects of webmaster channel carrier recovery circuit are the webmaster signal after the despreading to be carried out carrier wave recover to handle; 17 its effects of webmaster channel decoder are the webmaster channel data that demodulation is accomplished to be carried out error-correcting decoding handle, and 18 its effects of Traffic Channel low-converter are that the service signal that receives is carried out the orthogonal digital down-conversion, and relevant despreader 19 its effects of Traffic Channel are professional spread-spectrum signal to be carried out despreading handle; 20 its effects of traffic channel carrier restore circuit are the service signal after the despreading to be carried out carrier wave recover to handle, and 21 its effects of Traffic Channel decoder are the traffic channel data that demodulation is accomplished to be carried out error-correcting decoding handle.Embodiment sends data selector 9, channel encoder 10, spread spectrum modulator 11, base band shaping filter circuit 12, analog to digital converter 13, webmaster channel low-converter 14, the relevant despreader 15 of webmaster channel, webmaster channel carrier recovery circuit 16, webmaster channel decoder 17, Traffic Channel low-converter 18, the relevant despreader 19 of Traffic Channel, traffic channel carrier restore circuit 20,21 each functional modules employing monolithic fpga chip EP2C70F672I8 making of Traffic Channel decoder.
The utility model access control module 2 is by call controller 22, and network management information framing circuit 23, HDLC transmitter 24, transmission data selector 25, network management information are separated frame circuit 26, HDLC receiver 27, received data detector 28 compositions.The electric principle connection line of EXAMPLE Example baseband modulation and demodulation module 2 is as shown in Figure 3.The wherein processing of signalings such as the dislodging machine of call controller 22 its effect completion speeches, fax, data, ring indication and the processing that network management informations such as net, Traffic Channel application are gone into to move back in the terminal; 23 its effects of network management information framing circuit are to organize framing to the network management information that reports that the terminal needs by webmaster channel regulation frame format; 24 its effects of HDLC transmitter are by HDLC isl frame form packing output with the network management information frame; Sending data selector 25 its effects is to select to send network management data or business datum according to the current SOT state of termination; It is to resolve the webmaster command frame that network management information is separated 26 its effects of frame circuit, and valid data, 28 its effects of reception data detector that 27 its effects of HDLC receiver are extracted in the HDLC isl frame form are to detect various format frame data according to the SOT state of termination.Embodiment adopts commercially available dedicated cpu integrated circuit C8051F023, large scale integrated circuit XC2S200 to make.
The utility model fax module 6 is made up of user interface circuit 29, PCM encoder 30, facsimile coding circuit 31, facsimile data framer 32, facsimile data deframer 33, fax decoder circuit 34, PCM decoder 35.Wherein the variation of 2/4 line is accomplished in user interface circuit 29 effects; Produce 4 line analog signals, embodiment adopts user interface circuit MY2199 to make, and PCM encoder 30 is accomplished the PCM encoding and decoding with PCM decoder 35; Embodiment adopts TP3057 to make; Facsimile coding circuit 31 and the modulation of fax decoder circuit 34 completion to facsimile data produce the fax synchrodata, and embodiment adopts CX06832-12 facsimile modulation/demodulation chip manufacturing; The fax synchrodata of facsimile data framer 32 and 33 pairs of generations of facsimile data deframer adds frame and conciliates the frame processing, and embodiment adopts monolithic fpga chip XilinxXC2S200-5PQ208I to make.
4 its effects of the utility model power supply provide parts direct-current working volts at different levels, and embodiment adopts customization power supply 4NIC-QE83P, and its output+V1 voltage is that+5 volts, output+V2 voltage are+8 volts, and+V3 voltage is that+15 volts, output+V4 voltage are-8 volts.
The concise and to the point operation principle of the utility model is following:
Code division multiple access satellite communication terminal completion equipment in the CDMA satellite communication system networks and accomplishes fax, speech and the transmission of data service on satellite channel.Its inside mainly is made up of monitoring unit 1, IF Modulation demodulating unit 3, power supply 5, voice module 7, data module 8, binary channels baseband modulation and demodulation module 4, access control module 2, fax module 6.Each several part has all adopted modularity design technology, constitutes to have the corresponding units of standalone feature.
In the code division multiple access satellite communication terminal course of work; Outside facsimile service, voice service and data service are input to from corresponding business port C, D, E and convert synchrodata into after corresponding fax module 6, voice module 7 and data module 8 are handled accordingly and get into access control module 2; 2 pairs of business datums of access control module are carried out delivering to binary channels baseband modulation and demodulation module 4 after framing is handled with selection and are carried out chnnel coding, band spectrum modulation and base band shaping filtering; And the signal behind the base band shaping is delivered to IF Modulation demodulating unit 3 carry out IF Modulation, the signal after IF Modulation demodulating unit 3 will be modulated is exported from outside L frequency range medium frequency output end mouth A; Intermediate-freuqncy signal from outside L frequency range intermediate frequency input port B input; Get into IF Modulation demodulating unit 3; IF Modulation demodulating unit 3 carries out quadrature demodulation to it; Send the zero intermediate frequency signals after the demodulation binary channels baseband modulation and demodulation module 4 respectively webmaster channel and Traffic Channel to be carried out despreading, separate and be in harmonious proportion channel decoding and handle then, the data of having deciphered are delivered to access control module 2, and access control module 2 is selected business datum according to class of business; Deliver to corresponding fax module 6, voice module 7 and data module 8 respectively and handle accordingly, then from corresponding business port C, D, E output.
The mounting structure of the utility model is following: whole machine using standard 2U cabinet, cabinet inside adopt modular construction, each module all to adopt independently circuit to realize; Machine shape is of a size of 482.6 millimeters * 88 millimeters * 480 millimeters; In the cabinet both sides rail plate can be installed; The anterior monitoring unit of installing of cabinet; The cabinet rear portion is equipped with supply socket, medium frequency output end mouth A socket, intermediate frequency input port B socket, outside fax port C socket, outside voice port D socket, external data port E port, assembly cost utility model.
Claims (4)
1. code division multiple access satellite communication terminal; Comprise monitoring unit (1), IF Modulation demodulating unit (3), power supply (5), voice module (7) and data module (8); It is characterized in that: also comprise binary channels baseband modulation and demodulation module (4), access control module (2) and fax module (6); Wherein IF Modulation demodulating unit (3) goes out to hold 4 pin to be connected with outside L frequency range medium frequency output end mouth A; Intermediate frequency unit (3) is gone into end 5 pin and is connected with L frequency range intermediate frequency input port B; IF Modulation demodulating unit (3) goes into to hold 3 pin to go out to hold 3 pin to link to each other through data wire and monitoring unit (1), and intermediate frequency unit (3) goes into end 1 pin and binary channels baseband modulation and demodulation module (4) goes out to hold 2 pin to be connected, and intermediate frequency unit (3) goes out end 2 pin and binary channels baseband modulation and demodulation module (4) goes into to hold 3 pin to be connected; Binary channels baseband modulation and demodulation module (4) is gone into end 1 pin and is gone out to hold 1 pin to be connected with monitoring unit (1); Binary channels baseband modulation and demodulation module (4) goes out end 4 pin and goes into to hold 3 pin to be connected with access control module (2), and binary channels baseband modulation and demodulation module (4) goes into end 5 pin and access control module (2) goes out to hold 2 pin to be connected; Access control module (2) is gone into end 1 pin and is gone out to hold 2 pin to be connected with monitoring unit (1); Access control module (2) is gone into end 4 pin and is gone out to hold 1 pin to be connected with fax module (6); Access control module (2) goes out end 5 pin and goes into to hold 2 pin to be connected with fax module (6); Access control module (2) is gone into end 6 pin and is gone out to hold 1 pin to be connected with voice module (7); Access control module (2) goes out to hold 7 pin and voice module (7) to go into to hold 2 pin to be connected, and access control module (2) goes into end 8 pin and data module (8) goes out to hold 1 pin to be connected, and access control module (2) goes out end 9 pin and data module (8) goes into to hold 2 pin to be connected; Fax module (6) is gone into end 3 pin and is gone out to hold 4 pin to be connected with outside fax port C; Voice module (7) is gone into end 3 pin and is gone out end 4 pin and be connected with outside voice port D, and data module (8) is gone into to hold 3 pin and gone out to hold 4 pin to be connected with external data input port E, power supply (5) go out end+V1 ,+V2 ,+V3 ,+the corresponding power end of V4 voltage end and connecing with each parts;
The code division multiple access satellite communication terminal is when sending data; Analog facsimile signal entering fax module (6) is encoded, framing forms the digital fax signal and sends access control module (2) to; Analogue voice signal entering voice module (7) is encoded, framing forms digital voice signal and sends access control module (2) to; Asynchronous data gets into data module (8) and handles and form the asynchronous data transfer that meets the terminal interface standard and give access control module (2); Access control module (2) is to carrying out framing control, signaling process and sending processed data stream to binary channels baseband modulation and demodulation module (4) from the digital signal of fax module (6), voice module (7), data module (8); Binary channels baseband modulation and demodulation module (4) is carried out chnnel coding, spread spectrum, shaping filter and is formed baseband modulation signal and send IF Modulation demodulating unit (3) to inserting control module (2) processed data stream, and IF Modulation demodulating unit (3) carries out the intermediate-freuqncy signal that frequency spectrum shift, bandpass filtering form the L frequency range with the baseband modulation signal that receives and exports; When receiving data; IF Modulation demodulating unit (3) carries out intermediate frequency amplification, bandpass filtering, intermediate frequency demodulation, LPF to the L frequency range intermediate-freuqncy signal that receives and forms analog baseband signal and pass to binary channels baseband modulation and demodulation module (4); Binary channels baseband modulation and demodulation module (4) is carried out the data flow that A/D conversion, despread-and-demodulation, channel decoding recover to the analog baseband signal that receives and is sent access control module (2) to; Access control module (2) is separated frame to the data flow that receives and is handled, and forms digital voice signal, digital fax signal or asynchronous data and sends fax module (6), voice module (7), data module (8) respectively to; Fax module (6) is decoded to the digital fax signal that receives and is reverted to analog facsimile signal and analog facsimile signal is exported; Voice module (7) is decoded to the digital voice signal that receives and is reverted to analogue voice signal and analogue voice signal is exported; Data module (8) is handled the asynchronous data that receives, and the asynchronous data after handling is exported; Monitoring unit (1) is sent to access control module (2), IF Modulation demodulating unit (3), binary channels baseband modulation and demodulation module (4) respectively with pilot signal and realizes the control to the terminal.
2. code division multiple access satellite communication terminal according to claim 1; It is characterized in that: be that binary channels baseband modulation and demodulation module (4) is formed by sending data selector (9), channel encoder (10), spread spectrum modulator (11), base band shaping filter circuit (12), analog to digital converter (13), webmaster channel low-converter (14), the relevant despreader (15) of webmaster channel, webmaster channel carrier recovery circuit (16), webmaster channel decoder (17), Traffic Channel low-converter (18), the relevant despreader (19) of Traffic Channel, traffic channel carrier restore circuit (20) and Traffic Channel decoder (21); Wherein sending data selector (9) goes into to hold 1 pin and access control module (2) to go out to hold 2 pin to be connected; Sending data selector (9) goes out to hold 2 pin and channel encoder (10) to go into to hold 1 pin to be connected; Channel encoder (10) goes out end 2 pin and goes into to hold 1 pin to be connected with spread spectrum modulator (11); Spread spectrum modulator (11) goes out end 2 pin and goes into to hold 1 pin to be connected with base band shaping filter circuit (12), and base band shaping filter circuit (12) goes out end 2 pin and IF Modulation demodulating unit (3) goes into to hold 1 pin to be connected; Analog to digital converter (13) is gone into end 2 pin and is gone out to hold 2 pin to be connected with IF Modulation demodulating unit (3); Analog to digital converter (13) goes out end 1 pin and goes into to hold 2 pin to be connected with webmaster channel low-converter (14); Webmaster channel low-converter (14) goes out the end relevant despreader with the webmaster channel of 1 pin (15) and goes into the connection of end 2 pin; The webmaster channel despreader (15) of being correlated with goes out end 1 pin and goes into to hold 2 pin to be connected with webmaster channel carrier recovery circuit (16); Webmaster channel carrier recovery circuit (16) goes out end 1 pin and goes into to hold 2 pin to be connected with webmaster channel decoder (17); Webmaster channel decoder (17) goes out end 1 pin and goes into to hold 3 pin to be connected with access control module (2); Webmaster channel low-converter (14) goes out to hold 3 pin and Traffic Channel low-converter (18) to go into to hold 3 pin to be connected simultaneously; Traffic Channel low-converter (18) is gone into end 2 pin and is gone out end 1 pin with analog to digital converter (13) and is connected, and Traffic Channel low-converter (18) goes out the end relevant despreader with Traffic Channel of 1 pin (19) and goes into to hold the connection of 2 pin, and the Traffic Channel despreader (19) of being correlated with goes out to hold 1 pin and traffic channel carrier restore circuit (20) to go into to hold 2 pin to be connected; Traffic channel carrier restore circuit (20) goes out end 1 pin and goes into to hold 2 pin to be connected with Traffic Channel decoder (21), and Traffic Channel decoder (21) goes out end 1 pin and access control module (2) goes into to hold 3 pin to be connected; Send data selector (9); Channel encoder (10); Spread spectrum modulator (11); Base band shaping filter circuit (12); Analog to digital converter (13); Webmaster channel low-converter (14); The webmaster channel despreader (15) of being correlated with; Webmaster channel carrier recovery circuit (16); Webmaster channel decoder (17); Traffic Channel low-converter (18); The Traffic Channel despreader (19) of being correlated with; Traffic channel carrier restore circuit (20); Traffic Channel decoder (21) is respectively gone into end 4 pin and is gone out end+V1 power end with power supply (5) and be connected; Respectively going into end 5 pin is connected with the ground end;
Binary channels baseband modulation and demodulation module (4) is sent in the data procedures; Send data selector (9) to the business datum that receives and network management data is selected and will select after data be sent to channel encoder (10); The data that channel encoder (10) will carry out after the channel error correction coding also will be encoded the data after selecting are sent to spread spectrum modulator (11); Spread spectrum modulator (11) is carried out band spectrum modulation and the data behind the spread spectrum is sent to base band shaping filter circuit (12) the data after encoding; Base band shaping filter circuit (12) forms filtering to the signal after the band spectrum modulation, and filtered data are sent into IF Modulation demodulating unit (3); In the network management data receiving course; Analog to digital converter (13) converts the ABB network management data that receives the digital baseband network management data to and is sent to webmaster channel low-converter (14); Data after webmaster channel low-converter (14) also will be handled the frequency spectrum shift of digital baseband network management data to zero intermediate frequency are sent to the relevant despreader (15) of webmaster channel; The webmaster channel despreader (15) of being correlated with carries out the data after the down-converted despreading and the data after the despreading is sent to webmaster channel carrier recovery circuit (16); Webmaster channel carrier recovery circuit (16) carries out the frequency deviation correction and the revised data of frequency deviation is sent to webmaster channel decoder (17) the data after the despreading; Webmaster channel decoder (17) is deciphered the revised data of frequency deviation, and the network management data after will deciphering is sent into access control unit (2); In the business datum receiving course; Analog to digital converter (13) converts the ABB business datum that receives the digital baseband business datum to and is sent to Traffic Channel low-converter (18); Data after Traffic Channel low-converter (18) also will be handled the frequency spectrum shift of digital baseband business datum to zero intermediate frequency are sent to the relevant despreader (19) of Traffic Channel; The Traffic Channel despreader (19) of being correlated with carries out the data after the down-converted despreading and the data after the despreading is sent to traffic channel carrier restore circuit (20); Traffic channel carrier restore circuit (20) carries out the frequency deviation correction and the revised data of frequency deviation is sent to Traffic Channel decoder (21) the data after the despreading; Traffic Channel decoder (21) is deciphered the revised data of frequency deviation, and the business datum after will deciphering is sent into access control unit (2).
3. code division multiple access satellite communication terminal according to claim 1 and 2; It is characterized in that: access control module (2) is by call controller (22); Network management information framing circuit (23), HDLC transmitter (24), transmission data selector (25), network management information are separated frame circuit (26), HDLC receiver (27), are received data detector (28) composition; Wherein call controller (22) goes into to hold 1 pin and voice module (6) to go out to hold 1 pin to be connected; Call controller (22) goes out end 2 pin and goes into to hold 2 pin to be connected with voice module (6); Call controller (22) is gone into end 3 pin and is gone out to hold 1 pin to be connected with fax module (7); Call controller (22) goes out to hold 4 pin and fax module (7) to go into to hold 2 pin to be connected, and end 5 pin gone into by call controller (22) and data module (8) goes out to hold 1 pin to be connected, and call controller (22) goes out end 6 pin and data module (8) goes into to hold 2 pin to be connected; Call controller (22) is gone into end 7 pin and is gone out to hold 3 pin to be connected with reception data detector (28); Call controller (22) goes out end 8 pin and sends data selector (25) and go into end 3 pin and is connected, and call controller (22) is gone into end 9 pin and separated frame circuit (26) with network management information and go out to hold 1 pin to be connected, and call controller (22) goes out to hold 10 pin and network management information framing circuit (23) to go into to hold 1 pin to be connected; Network management information framing circuit (23) goes out end 2 pin and goes into to hold 1 pin to be connected with HDLC transmitter (24); HDLC transmitter (24) goes out to hold 2 pin and transmission data selector (25) to go into to hold 1 pin to be connected, and sends data selector (25) and goes out to hold 2 pin and binary channels baseband modulation and demodulation module (4) to go into to hold 5 pin to be connected, and network management information is separated frame circuit (26) and gone into to hold 2 pin and HDLC receiver (27) to go out to hold 1 pin to be connected; HDLC receiver (27) goes into to hold 2 pin and reception data detector (28) to go out to hold 1 pin to be connected, and receives data detector (28) and goes into to hold 2 pin and binary channels baseband modulation and demodulation module (4) to go out to hold 4 pin to be connected; Call controller (22), sends data selector (25), network management information and separates frame circuit (26), HDLC receiver (27), receives data detector (28) and respectively go into end 11 pin and power supply (5) and go out end+V1 power end and be connected, respectively go into to hold 12 pin to hold with ground to be connected network management information framing circuit (23), HDLC transmitter (24);
Access control module (2) is sent in the network management data process; Voice module (6), fax module (7) or data module (8) are sent request msg to access control module (2); Call controller (22) receives request msg and produces the transmission network management data and be sent to network management information framing circuit (23); Network management information framing circuit (23) carries out framing with the network management data that receives; And the network management data behind the framing is sent to HDLC transmitter (24), the network management data of HDLC transmitter (24) after with the framing that receives handled according to the HDLC agreement, and the network management data after will handling is sent to binary channels baseband modulation and demodulation module (4) through sending data selector (25); Access control module (2) receives in the network management data process; Receive data detector (28) network management data that receives is sent to HDLC receiver (27); HDLC receiver (27) is handled the network management data that receives according to the HDLC agreement; And the network management data after will handling is sent to network management information and separates frame circuit (26); Network management information is separated frame circuit (26) and will be received network management information and separate frame and handle, and the network management information that will separate behind the frame is sent to call controller (22), and call controller (22) receives to separate the network management information behind the frame and produce reply data and sends voice module (6), fax module (7) or data module (8) to;
Access control module (2) is sent in the business datum process; Voice module (6), fax module (7) or data module (8) are sent business datum to access control module (2); Call controller (22) receives business datum and handles, and the data after will handling are transferred to binary channels baseband modulation and demodulation module (4) through sending data selector (25); Access control module (2) receives in the business datum process; Receive data detector (28) business datum that receives is sent to call controller (22), the signal after call controller (22) is handled the signal that receives and will handle is sent to voice module (6), fax module (7) or data module (8).
4. code division multiple access satellite communication terminal according to claim 3; It is characterized in that: fax module (6) is made up of user interface circuit (29), PCM encoder (30), facsimile coding circuit (31), facsimile data framer (32), facsimile data deframer (33), fax decoder circuit (34), PCM decoder (35); Wherein user interface circuit (29) goes into to hold 1 pin to be connected with outside fax port C; User interface circuit (29) goes out end 2 pin and is connected with outside fax port C; User interface circuit (29) goes out end 3 pin and goes into to hold 1 pin to be connected with PCM encoder (30); User interface circuit (29) is gone into end 4 pin and is gone out to hold 1 pin to be connected with PCM decoder (35); PCM encoder (30) goes out end 2 pin and goes into to hold 1 pin to be connected with facsimile coding circuit (31); Facsimile coding circuit (31) goes out end 2 pin and goes into to hold 1 pin to be connected with facsimile data framer (32); Facsimile data framer (32) goes out to hold 2 pin and access control module (2) to go into to hold 4 pin to be connected, and access control module (2) goes out end 5 and goes into to hold 2 to be connected with facsimile data deframer (33), and facsimile data deframer (33) goes out end 1 and goes into to hold 2 to be connected with fax decoder circuit (34); Fax decoder circuit (34) goes out end 1 and goes into end 2 with PCM decoder (35) and is connected, and user interface circuit (29), PCM encoder (30), facsimile coding circuit (31), facsimile data framer (32), facsimile data deframer (33), fax decoder circuit (34), PCM decoder (35) are respectively gone into end 11 pin and power supply (5) and gone out end+V1 power end and be connected, respectively go into to hold 12 pin to hold with ground to be connected;
When sending facsimile data, outside facsimile signal is sent to PCM encoder (30) through user interface circuit (29), and PCM encoder (30) is encoded the facsimile signal that receives; Send the PCM sign indicating number type data behind the coding to facsimile coding circuit (31); Facsimile coding circuit (31) is encoded PCM sign indicating number type data, and the data after will encoding are sent to facsimile data framer (32), and facsimile data framer (32) carries out framing with the data that receive; And send the data behind the framing to access control module (2); When receiving faxes data, facsimile data deframer (33) receives from the facsimile data of access control module (2) and separates frame, and the data of separating behind the frame are sent to fax decoder circuit (34); Fax decoder circuit (34) is deciphered the data that receive; And the PCM sign indicating number type data that obtain after will deciphering are sent to PCM decoder (35), and PCM decoder (35) is deciphered PCM sign indicating number type data, and the data after will deciphering are sent out the terminal through user interface circuit (29).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205757113U CN202513929U (en) | 2011-12-31 | 2011-12-31 | Code division multiple access satellite communication terminal |
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| CN2011205757113U CN202513929U (en) | 2011-12-31 | 2011-12-31 | Code division multiple access satellite communication terminal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647596A (en) * | 2013-12-31 | 2014-03-19 | 北京国电通网络技术有限公司技术服务中心 | Double-receiving and double-transmitting modulator-demodulator of satellite |
| CN104579451A (en) * | 2013-10-25 | 2015-04-29 | 北京米波通信技术有限公司 | Iridium communication signal receiving device |
| CN104618058A (en) * | 2015-01-09 | 2015-05-13 | 中国电子科技集团公司第五十四研究所 | LDPC (Low Density Parity Check) coding based variable medium rate frame-by-frame modulator |
-
2011
- 2011-12-31 CN CN2011205757113U patent/CN202513929U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579451A (en) * | 2013-10-25 | 2015-04-29 | 北京米波通信技术有限公司 | Iridium communication signal receiving device |
| CN103647596A (en) * | 2013-12-31 | 2014-03-19 | 北京国电通网络技术有限公司技术服务中心 | Double-receiving and double-transmitting modulator-demodulator of satellite |
| CN104618058A (en) * | 2015-01-09 | 2015-05-13 | 中国电子科技集团公司第五十四研究所 | LDPC (Low Density Parity Check) coding based variable medium rate frame-by-frame modulator |
| CN104618058B (en) * | 2015-01-09 | 2017-10-20 | 中国电子科技集团公司第五十四研究所 | The medium-rate variable modulator frame by frame encoded based on LDPC |
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Assignee: Hebei Shenzhou Satellite Communications Co., Ltd. Assignor: No.54 Inst., China Electronic Sci. & Tech. Group Co. Contract record no.: 2013130000073 Denomination of utility model: Code division multiple access satellite communication terminal Granted publication date: 20121031 License type: Exclusive License Record date: 20130807 |
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Assignee: Hebei Shenzhou Satellite Communications Co., Ltd. Assignor: No.54 Inst., China Electronic Sci. & Tech. Group Co. Contract record no.: 2013130000073 Date of cancellation: 20150807 |
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