CN102545994A - Digital video broadcasting (DVB)-carrier-based satellite identification circuit and method - Google Patents
Digital video broadcasting (DVB)-carrier-based satellite identification circuit and method Download PDFInfo
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- CN102545994A CN102545994A CN2012100313401A CN201210031340A CN102545994A CN 102545994 A CN102545994 A CN 102545994A CN 2012100313401 A CN2012100313401 A CN 2012100313401A CN 201210031340 A CN201210031340 A CN 201210031340A CN 102545994 A CN102545994 A CN 102545994A
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Abstract
The invention relates to a digital video broadcasting (DVB)-carrier-based satellite identification circuit and a DVB-carrier-based satellite identification method. The DVB-carrier-based satellite identification circuit comprises a digital satellite tuner module, an inter-integrated circuit (I2C) bus, a singlechip, a nonvolatile memory, a driving circuit and communication interfaces, wherein the digital satellite tuner module is externally connected with a low noise block; the I2C bus is connected with the digital satellite tuner module; and the singlechip is connected with the I2C bus, the nonvolatile memory, the driving circuit and the communication interfaces respectively. The digital satellite tuner module is used for satellite identification, so that satellites can be accurately, quickly and reliably judged and identified, and different satellites can be switched for identification according to needs.
Description
Technical field
The present invention relates to a kind of satellite identification circuit, specifically relate to a kind of satellite identification circuit and method based on the DVB carrier wave.
Background technology
The sky hundreds of satellites that distributing under the line; Almost about 2 degree a satellite is just arranged; In this intensive starry sky, how just can find the satellite that will specifically will use? The normal mode that adopts of satellite user mainly comprises following several kinds at present: utilize radio beacon set 1.; The price of Radio Beacon is too expensive, can't popularize use; 2. utilize spectrum analyzer, this has relatively high expectations to the satellite user specialized capability, and price is also relatively more expensive, and the scope of application is received very big restriction; 3. adopt broadband filter that the frequency signal outside the assigned frequency is carried out filtering, remove useless frequency, then the signal in the designated frequency range is carried out ionization meter, though this method relative cost is lower, reliability is not high, discerns inaccurate; 4. by decoder identification, this mode is operated underaction, and cost is also than higher.Therefore, develop a kind of function-stable, cheap satellite recognition system becomes the problem that this area needs to be resolved hurrily.
Summary of the invention
The purpose of this invention is to provide the satellite identification circuit that a kind of DVB carrier wave that utilizes satellite comes identification satellite based on the DVB carrier wave.
Another object of the present invention provides the method that a kind of DVB carrier wave that utilizes satellite comes identification satellite.
For reaching above-mentioned purpose, the present invention has adopted following technical scheme:
A kind of satellite identification circuit based on the DVB carrier wave; It comprises digital satellite tuner module, I2C bus, single-chip microcomputer, nonvolatile memory, drive circuit and communication interface; The external tuner of digital satellite tuner module; The I2C bus links to each other with the digital satellite tuner module, and single-chip microcomputer links to each other respectively at I2C bus, nonvolatile storage, drive circuit and communication interface.
Described satellite identification circuit based on the DVB carrier wave, wherein, said digital satellite tuner module is made up of digital PLL synthesizer and satellite demodulator, the external tuner of digital PLL synthesizer, the I2C bus links to each other with digital PLL synthesizer and satellite demodulator respectively.
Described satellite identification circuit based on the DVB carrier wave, wherein, said satellite demodulator connects an amplifying circuit, and the signal after amplifying circuit will amplify is transferred to the outside as the size of satellite-signal intensity; Said communication interface is RS232 interface and RS485 interface.
Described satellite identification circuit based on the DVB carrier wave, wherein, said communication interface is RS232 interface and RS485 interface.
Described satellite identification circuit based on the DVB carrier wave; Wherein, Said digital satellite tuner module is selected the BS2F7VZ0614 module or the BS2F7VZ0194 module of Sharp Corp for use, or the module that adopts PLL chip combiner IX2410, demodulation chip ZL10312 and peripheral circuit to connect to form.
Described satellite identification circuit based on the DVB carrier wave, wherein, said single-chip microcomputer adopts the P89V51RD2 of PHILIPS Co. or the LPC2132 of the ARM7 of PHILIPS Co. series, or 96 series monolithics of atmel corp.
The invention also discloses a kind of satellite recognition methods based on the DVB carrier wave, it comprises the steps:
1) the satellite DVB carrier wave of satellite antenna face collection is sent into tuner, after the tuner frequency reducing, sends into the digital satellite tuner module;
2) single-chip microcomputer is learned the satellite information of preparatory identification through communication port, and obtains frequency values and the symbol rate of satellite after the downstream frequency frequency reducing of satellite of preparatory identification from nonvolatile storage, with information through the I2C bus transfer in the digital satellite tuner module;
3) the digital satellite tuner module respectively will be from step 2) in the information obtained carry out computing, arrangement, comparison; When step 2) in the satellite DVB carrier data obtained in frequency values and symbol rate and the step 1) of the satellite of identification in advance when consistent; This satellite of digital satellite tuner module locking is accomplished satellite identification.
Described satellite recognition methods based on the DVB carrier wave; Wherein, Said digital satellite tuner module comprises digital PLL synthesizer and satellite demodulator; In said step 2) in advance the frequency values of the satellite of identification be delivered to the digital PLL synthesizer through the I2C bus, the symbol rate of the satellite of identification is transported to satellite demodulator through the I2C bus in advance.
Described satellite recognition methods based on the DVB carrier wave, wherein, said step 3) medium frequency value is after digital PLL synthesizer frequency-conversion processing and filtering arrangement, and the I/Q baseband signal of exporting one group of quadrature is in satellite demodulator; Satellite demodulator is according to symbol rate computing I/Q baseband signal; And feed back to an automatic gain aanalogvoltage to the PLL synthesizer; The binding post of automatic gain aanalogvoltage is connected with amplifying circuit; Signal after amplifying is outputed to the outside as the size of satellite-signal intensity, and satellite demodulator is the record locking sign simultaneously.
Described satellite recognition methods based on the DVB carrier wave; Wherein, Said digital PLL synthesizer frequency-conversion processing and filtering arrangement is earlier the frequency of voltage controlled oscillator output in the digital PLL synthesizer to be carried out after 90 degree shift to back and the frequency values mixing that receives; With the filter arrangement of mixed frequency signal in the digital PLL synthesizer, the I/Q baseband signal of exporting one group of quadrature is to satellite demodulator.
Described satellite recognition methods based on the DVB carrier wave, wherein, said single-chip microcomputer is learned the satellite lock flag that satellite demodulator is known through the I2C Bus Real Time, and through block level of drive circuit output.
Satellite identification circuit based on the DVB carrier wave of the present invention, used unit is cheap, and cost is lower, and is can be accurately quick through the digital satellite tuner module, judge identification satellite reliably, and can switch different satellites as required and discern.
Description of drawings
Fig. 1 is the structural representation that the present invention is based on the satellite identification circuit of DVB carrier wave;
Fig. 2 is the annexation sketch map that the satellite identification circuit that the present invention is based on the DVB carrier wave is applied to moving carrier satellite antenna receiving and tracking system.
Embodiment
The invention is further illustrated by the following examples, but the present invention is not limited in said embodiment.
Referring to shown in Figure 1; A kind of satellite identification circuit based on the DVB carrier wave; Comprise digital satellite tuner module 4, I2C bus 5, single-chip microprocessor MCU 6, nonvolatile memory 7, drive circuit 9 and communication interface 10/11; Digital satellite tuner module 4 external tuners 1, I2C bus 5 links to each other with digital satellite tuner module 4, and single-chip microprocessor MCU 6 links to each other respectively at I2C bus 5, nonvolatile storage 7, drive circuit 9 and communication interface 10/11.Wherein, digital satellite tuner module 4 is made up of digital PLL synthesizer 2 and satellite demodulator 3, digital PLL synthesizer 2 external tuners 1, and I2C bus 5 links to each other with digital PLL synthesizer 2 and satellite demodulator 3 respectively.
Identification and processing for the ease of information; One group of I/Q orthogonal signalling of digital PLL synthesizer 2 outputs are to satellite demodulator 3; Automatic gain aanalogvoltage of satellite demodulator 3 outputs feeds back to the digital PLL synthesizer; This automatic gain aanalogvoltage is connected to amplifying circuit 8 in addition, and the size of the signal after amplifying as satellite-signal intensity outputed to outside the wiring board of satellite identification circuit of the present invention.
Of a great variety on single-chip microcomputer 6 markets, all can use.That adopt in the present embodiment is the P89V51RD2 of PHILIPS Co., uses the C Programming with Pascal Language.Also can use the LPC2132 of the ARM7 of PHILIPS Co. class, or 96 series monolithics of atmel corp, or the MCU of other company, do not enumerate one by one at this.
Digital satellite tuner module 4 can be selected the BS2F7VZ0614 of Sharp Corp in this enforcement, and this module is mainly made tuner at digital satellite broadcasting and used.The module of similar function is more, like BS2F7VZ0194 etc.The combination of other chip-scale also can replace this module, like PLL chip combiner IX2410 and demodulation chip ZL10312 combination, mixes peripheral circuit and can replace this module fully.
The BS2F7VZ0614 inside modules comprises digital PLL synthesizer 2 and digital satellite demodulator 3.This module receive frequency range is 950MHz-2150MHz, and symbol rate is 2Msps-45Msps, is applicable to full frequency band DVB carrier wave.
MSB LSB
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | A | Byte1 |
| 0 | N10 | N9 | N8 | N7 | N6 | N5 | N4 | A | Byte2 |
| N3 | N2 | N1 | A5 | A4 | A3 | A2 | A1 | A | Byte3 |
| 1 | 1 | 1 | PD5 | PD4 | TM | 0(R1) | 1(R0) | A | Byte4 |
| BA2 | BA1 | BA0 | 0 | PD3 | PD2 | DIV | PD0 | A | Byte5 |
Byte1: the I2C address of digital PLL synthesizer
The N10-N1:N counter
The A5-A1:A counter
BA2-BA0: module receive frequency range
PD5-PD2: the cut-off frequency that baseband low pass filters is set
Formula below utilizing can calculate the output frequency of voltage controlled oscillator
Fvco＝[(P*N)+A]*Fosc/R
Wherein:
P is a constant 32
N is the value of N counter
A is the value of A counter
Fosc is reference frequency 4M
R is the frequency dividing ratio of reference frequency
The signal that gets into the PLL synthesizer amplifies and the double conversion processing, exports the one group of quadrature I/Q baseband signal that is controlled at bandwidth 10M-34M able to programme.
Demodulator solves I/Q baseband signal and channel-decoded by QPSK/BPSK and realizes the FEC (forward error correction) of complete DVB/DSS, exports the data flow of 8 bits with MPEG2 or the packing of DSS form.Demodulator has 128 function registers, in program, will carry out assignment or setting to function register.Detailed function register explanation please be checked this module handbook.
The course of work of the satellite identification circuit based on the DVB carrier wave of the present invention is:
The satellite DVB carrier wave that the satellite antenna face is collected is delivered to tuner 1, after tuner LNB1 frequency reducing, delivers to PLL synthesizer 2.Ancillary equipment informs through communication port RS232 or RS485 which satellite MCU6 discerns in advance; MCU6 takes out the frequency values after the satellite downlink frequency frequency reducing from 7 li of nonvolatile storages; Computing obtains the value of top byte Byte2-Byte5 or the position is set, and gives PLL synthesizer 2 through I2C bus 5 assignment.The frequency of the voltage controlled oscillator VCO output in the digital PLL synthesizer 2 after 90 degree phase shifts with the frequency mixing of reception, the low pass filter LPF of the signal after the mixing in digital PLL synthesizer 2 exports the I/Q baseband signal of one group of quadrature.
The I/Q baseband signal outputs in the satellite demodulator 3.MCU6 gives satellite demodulator from the symbol rate of 7 li taking-ups of nonvolatile storage satellite through I2C bus 5 assignment again, and symbol rate is the transmission rate of data, and is relevant with the bit rate and the channel parameter of signal.Satellite demodulator 3 is according to symbol rate computing i/q signal, and exports an automatic gain aanalogvoltage that feeds back to PLL synthesizer 2.Frequency and symbol rate be as the parameter of distinguishing the satellite characteristic, and when the DVB carrier wave of these two parameters and satellite was consistent, satellite demodulator 3 was thought and locked satellite.
The automatic gain voltage of exporting during satellite demodulator 3 locking satellites has a significantly sudden change, and automatic gain voltage outputs to binding post after amplifying circuit 4 amplifies.This automatic gain voltage is represented satellite-signal intensity, and satellite demodulator 3 is at own inner register record locking sign simultaneously.MCU6 real time access satellite demodulator 3 is known the lock condition of satellite.MCU6 is through block level of drive circuit 9 outputs.When antenna positive alignment satellite, the automatic gain voltage of satellite demodulator 3 outputs is maximum.
Digital satellite tuner module more than 4 is used in the satellite television decoder, watches satellite TV's program.The present invention utilizes its function and own circuit to make satellite and discerns and surely belong to the first.
A kind of satellite recognition methods based on the DVB carrier wave, it comprises the steps:
1) the satellite DVB carrier wave of satellite antenna face collection is sent into tuner 1, after tuner 1 frequency reducing, sends into digital satellite tuner module 4;
2) single-chip microcomputer 6 is learned the satellite information of preparatory identification through RS232 or RS485 communication port 10/11; And obtain frequency values and the symbol rate of satellite after the downstream frequency frequency reducing of satellite of preparatory identification from nonvolatile storage 7, information is transferred in the digital satellite tuner module 4 through I2C bus 5;
3) digital satellite tuner module 4 respectively will be from step 2) in the information obtained carry out computing, arrangement, comparison; When step 2) in the satellite DVB carrier data obtained in frequency values and symbol rate and the step 1) of the satellite of identification in advance when consistent; Digital satellite tuner module 4 these satellites of locking are accomplished satellite identification.
Wherein, The digital satellite tuner module comprises digital PLL synthesizer 2 and satellite demodulator 3; In said step 2) in advance the frequency values of the satellite of identification be delivered to digital PLL synthesizer 2 through I2C bus 5, the symbol rate of the satellite of identification is transported to satellite demodulator 3 through I2C bus 5 in advance.
Step 3) medium frequency value is after digital PLL synthesizer 2 frequency-conversion processing and filtering arrangement, and the I/Q baseband signal of exporting one group of quadrature is in satellite demodulator 3; Satellite demodulator 3 is according to symbol rate computing I/Q baseband signal; And feed back to an automatic gain aanalogvoltage to PLL synthesizer 2; The binding post of automatic gain aanalogvoltage connects an amplifying circuit 8 in addition; Signal after the amplification outputs to outside the wiring board of satellite identification circuit of the present invention as the size of satellite-signal intensity, and satellite demodulator 3 is the record locking sign simultaneously.
Single-chip microcomputer 6 is learned the satellite lock flag that satellite demodulator 3 is known in real time through I2C bus 5, and through block level of drive circuit 9 outputs.
Referring to shown in Figure 2, be applied to the sketch map of moving carrier satellite antenna receiving and tracking system for the satellite identification circuit that the present invention is based on the DVB carrier wave.This system comprises tuner LNB1, the satellite identification circuit 12 based on the DVB carrier wave, satellite antenna controller 13, azimuth-drive motor drive circuit 14, pitching motor drive circuit 15, polarization motor-drive circuit 16, orientation assembly 17, pitching assembly 18, polarization assembly 19 compositions.The satellite identification circuit 12 of DVB carrier wave links to each other with tuner 1 and satellite antenna controller 13 respectively.The satellite antenna controller links to each other with azimuth-drive motor drive circuit 14, pitching motor drive circuit 15 and polarization motor-drive circuit 16 respectively.
Claims (10)
1. satellite identification circuit based on the DVB carrier wave is characterized in that:
Comprise digital satellite tuner module, I2C bus, single-chip microcomputer, nonvolatile memory, drive circuit and communication interface; The external tuner of digital satellite tuner module; The I2C bus links to each other with the digital satellite tuner module, and single-chip microcomputer links to each other respectively at I2C bus, nonvolatile storage, drive circuit and communication interface.
2. the satellite identification circuit based on the DVB carrier wave according to claim 1 is characterized in that:
Said digital satellite tuner module is made up of digital PLL synthesizer and satellite demodulator, the external tuner of digital PLL synthesizer, and the I2C bus links to each other with digital PLL synthesizer and satellite demodulator respectively.
3. the satellite identification circuit based on the DVB carrier wave according to claim 2 is characterized in that:
Said satellite demodulator connects an amplifying circuit, and the signal after amplifying circuit will amplify is transferred to the outside as the size of satellite-signal intensity; Said communication interface is RS232 interface and RS485 interface.
4. the satellite identification circuit based on the DVB carrier wave according to claim 1 is characterized in that:
Said digital satellite tuner module is selected the BS2F7VZ0614 module or the BS2F7VZ0194 module of Sharp Corp for use, or the module that adopts PLL chip combiner IX2410, demodulation chip ZL10312 and peripheral circuit to connect to form.
5. according to arbitrary described satellite identification circuit among the claim 1-4, it is characterized in that based on the DVB carrier wave:
Said single-chip microcomputer adopts the P89V51RD2 of PHILIPS Co. or the LPC2132 of the ARM7 of PHILIPS Co. series, or 96 series monolithics of atmel corp.
6. the satellite recognition methods based on the DVB carrier wave is characterized in that: comprise the steps:
1) the satellite DVB carrier wave of satellite antenna face collection is sent into tuner, after the tuner frequency reducing, sends into the digital satellite tuner module;
2) single-chip microcomputer is learned the satellite information of preparatory identification through communication port, and obtains frequency values and the symbol rate of satellite after the downstream frequency frequency reducing of satellite of preparatory identification from nonvolatile storage, with information through the I2C bus transfer in the digital satellite tuner module;
3) the digital satellite tuner module respectively will be from step 2) in the information obtained carry out computing, arrangement, comparison; When step 2) in the satellite DVB carrier data obtained in frequency values and symbol rate and the step 1) of the satellite of identification in advance when consistent; This satellite of digital satellite tuner module locking is accomplished satellite identification.
7. the satellite recognition methods based on the DVB carrier wave according to claim 6 is characterized in that:
Said digital satellite tuner module comprises digital PLL synthesizer and satellite demodulator; In said step 2) in advance the frequency values of the satellite of identification be delivered to the digital PLL synthesizer through the I2C bus, the symbol rate of the satellite of identification is transported to satellite demodulator through the I2C bus in advance.
8. the satellite recognition methods based on the DVB carrier wave according to claim 7 is characterized in that:
Said step 3) medium frequency value is after digital PLL synthesizer frequency-conversion processing and filtering arrangement, and the I/Q baseband signal of exporting one group of quadrature is in satellite demodulator; Satellite demodulator is according to symbol rate computing I/Q baseband signal; And feed back to an automatic gain aanalogvoltage to the PLL synthesizer; The binding post of automatic gain aanalogvoltage is connected with amplifying circuit; Signal after amplifying is transferred to the outside as the size of satellite-signal intensity, and satellite demodulator is the record locking sign simultaneously.
9. the satellite recognition methods based on the DVB carrier wave according to claim 8 is characterized in that:
Said digital PLL synthesizer frequency-conversion processing and filtering arrangement is earlier the frequency of voltage controlled oscillator output in the digital PLL synthesizer to be carried out after 90 degree shift to back and the frequency values mixing that receives; With the filter arrangement of mixed frequency signal in the digital PLL synthesizer, the I/Q baseband signal of exporting one group of quadrature is to satellite demodulator.
10. according to arbitrary described satellite recognition methods among the claim 7-9, it is characterized in that based on the DVB carrier wave:
Said single-chip microcomputer is learned the satellite lock flag that satellite demodulator is known through the I2C Bus Real Time, and through block level of drive circuit output.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337655A (en) * | 2015-10-21 | 2016-02-17 | 北京华胜天成信息技术发展有限公司 | Satellite confirmation method, controller and satellite confirmation system |
| CN111404596A (en) * | 2020-03-27 | 2020-07-10 | 南京宽超通信技术有限公司 | Multifunctional controller for satellite downlink tuner |
| CN113485212A (en) * | 2021-09-07 | 2021-10-08 | 北京扬铭科技发展有限责任公司 | Broadband satellite signal intelligent identification system |
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| CN101365122A (en) * | 2007-08-08 | 2009-02-11 | 吕海龙 | Portable frequency spectrum digital star identifier |
| CN101893902A (en) * | 2010-07-07 | 2010-11-24 | 北京爱科迪信息通讯技术有限公司 | Satellite antenna control system and satellite finding method |
| CN202083963U (en) * | 2011-06-01 | 2011-12-21 | 浙江中星光电子科技有限公司 | Mobile satellite antenna controller for ABS-S satellite signal |
| CN202142644U (en) * | 2011-06-08 | 2012-02-08 | 北京大唐中和电子技术有限公司 | Satellite antenna and antenna frame controller |
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2012
- 2012-02-13 CN CN201210031340.1A patent/CN102545994B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101365122A (en) * | 2007-08-08 | 2009-02-11 | 吕海龙 | Portable frequency spectrum digital star identifier |
| CN101893902A (en) * | 2010-07-07 | 2010-11-24 | 北京爱科迪信息通讯技术有限公司 | Satellite antenna control system and satellite finding method |
| CN202083963U (en) * | 2011-06-01 | 2011-12-21 | 浙江中星光电子科技有限公司 | Mobile satellite antenna controller for ABS-S satellite signal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337655A (en) * | 2015-10-21 | 2016-02-17 | 北京华胜天成信息技术发展有限公司 | Satellite confirmation method, controller and satellite confirmation system |
| CN111404596A (en) * | 2020-03-27 | 2020-07-10 | 南京宽超通信技术有限公司 | Multifunctional controller for satellite downlink tuner |
| CN113485212A (en) * | 2021-09-07 | 2021-10-08 | 北京扬铭科技发展有限责任公司 | Broadband satellite signal intelligent identification system |
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