CN106686330A - High-frequency head processing system based on DSP chip - Google Patents
High-frequency head processing system based on DSP chip Download PDFInfo
- Publication number
- CN106686330A CN106686330A CN201611093669.5A CN201611093669A CN106686330A CN 106686330 A CN106686330 A CN 106686330A CN 201611093669 A CN201611093669 A CN 201611093669A CN 106686330 A CN106686330 A CN 106686330A
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- CN
- China
- Prior art keywords
- dsp chip
- frequency
- processing system
- filter
- system based
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
Abstract
The invention discloses a high-frequency head processing system based on a DSP chip. The system comprises the DSP chip which is connected with a signal acquisition module, an RF output port, a data storage and a wireless communication module. A signal sensor unit is arranged in the signal acquisition module and is connected with an AD converter which is connected with a data acquisition card. The RF output port is connected with a low-noise amplifier which is connected with a microstrip filter. The microstrip filter is connected with a frequency mixer which is connected with a local oscillator and an intermediate-frequency filter. The intermediate-frequency filter is connected with an intermediate-frequency amplifier. By applying the DSP chip, analyzing interference signal received by a high frequency head, effectively detecting signal intensity, determining an interference source, controlling circuit selection through the DSP chip, achieving anti-interference processing by use of the filter, and achieving output of the signals through the proper amplifier, the normal use of the high frequency head is ensured and the high-frequency head processing system is worthy of promotion.
Description
Technical field
The present invention relates to signal processing technology field, specially a kind of tuner processing system based on dsp chip.
Background technology
Tuner is television set for a kind of device for receiving high-frequency signal He demodulate video information, is also public passage
Part I.The tuner that current television set is used is generally divided into data signal tuner（Abbreviation digit tuner）And simulation
Signal tuner（Referred to as simulate tuner）.Simply say to be exactly the tuning and high-frequency signal amplifier for receiving television signals, defend
Star television decoder.With the development of microwave technology, increasing TV signal is all carried out at a distance in real time by satellite
Transmission.As the microwave product that family expenses are common, tuner because its of a relatively high cost performance, in the television reception of countless families
In occupy this status that can not be reached.Existing tuner is all to converge to satellite-signal by satellite reception pot on the market, is led to
Tuner is crossed to be received for signal and frequency conversion.Then by a high-frequency signal line and the Set Top Box phase at television reception end
Even.Because the particularity of microwave signal transmission is, it is necessary to receiving terminal is positioned in comparatively spacious place, what is thus brought is
The high-frequency signal line grown is needed very much, holding wire wiring at home is also very inconvenient, due to many times for cost
Consideration, signal attenuation is increasingly severe caused by holding wire more long, influence signal reception.Therefore one kind is devised to be based on
The tuner processing system of dsp chip.
The content of the invention
For problem above, the invention provides a kind of tuner processing system based on dsp chip, by applying DSP
Chip, is analyzed to the interference signal that tuner is received, effective detection signal intensity, interference source is determined, by DSP cores
Piece control circuit selection, realizes anti-interference process, and the output of signal is realized by suitable amplifier using wave filter, it is ensured that
The normal of tuner is used, and is worthy to be popularized.
To achieve the above object, the present invention provides following technical scheme：A kind of tuner processing system based on dsp chip
System, it includes dsp chip, and the dsp chip is connected with signal acquisition module, RF output ports, data storage and channel radio
News module, is provided with signal transducer group in the signal acquisition module, the signal transducer group is connected with converter, institute
State converter and be connected with data collecting card, the RF output ports are connected with low noise amplifier, the low noise amplifier connection
There is microstrip filter, the microstrip filter is connected with frequency mixer, and the frequency mixer is connected with local oscillator and intermediate frequency filtering
Device, the intermediate-frequency filter is connected with intermediate frequency amplifier.
Used as a kind of preferred technical scheme of the present invention, the data collecting card is connected with data conversion port, the number
Frequency spectrograph is connected with according to conversion port.
As a kind of preferred technical scheme of the present invention, RF tag, the radio frequency are provided with the data storage
Label is connected with data receiver.
Used as a kind of preferred technical scheme of the present invention, the local oscillator working frequency is 9.55GHz.
As a kind of preferred technical scheme of the present invention, host computer is provided with the wireless communication module, it is described upper
Machine is connected with network adapter, and the network adapter is connected with gateway.
Used as a kind of preferred technical scheme of the present invention, the microstrip filter is using based on inductive coupled a quarter
The microstrip bandpass filter of wave resonator.
Used as a kind of preferred technical scheme of the present invention, the dsp chip uses ADSP-BF533 cake cores, up to 600
MHz high-performance Blackfin processors, 2 16 bit macs, 2 40 ALU, 48 digital video ALU, and 1 40 bit shift
Device.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention is analyzed by application dsp chip to the interference signal that tuner is received, and effective detection signal is strong
Degree, determines interference source, controls circuit to select by dsp chip, and anti-interference process is realized using wave filter, and by suitably putting
Big device realizes the output of signal, it is ensured that the normal of tuner is used, and is worthy to be popularized.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is microstrip filter schematic diagram of the present invention.
In figure：1-DSP chips, 2- signal acquisition modules, 3-RF output ports, 4- data storages, 5- wireless telecommunications moulds
Block, 6- signal transducer groups, 7-AD converters, 8- data collecting cards, 9- low noise amplifiers, 10- microstrip filters, 11- mixing
Device, 12- local oscillators, 13- intermediate-frequency filters, 14- intermediate frequency amplifiers, 15- data conversions port, 16- frequency spectrographs, 17- is penetrated
Frequency marking label, 18- data receivers, 19- host computers, 20- network adapter, 21- gateways.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment：
Fig. 1 and Fig. 2 is referred to, the present invention provides a kind of technical scheme：A kind of tuner processing system based on dsp chip, it
Including dsp chip 1, dsp chip 1 is connected with signal acquisition module 2, RF output ports 3, data storage 4 and wireless telecommunications mould
Signal transducer group 6 is provided with block 5, signal acquisition module 2, signal transducer group 6 is connected with converter 7, converter 7
Data collecting card 8 is connected with, RF output ports 3 are connected with low noise amplifier, and low noise amplifier is connected with microstrip filter 1, micro-
Band filter 1 is connected with frequency mixer 11, and frequency mixer 11 is connected with local oscillator 12 and intermediate-frequency filter 13, intermediate-frequency filter 13
Intermediate frequency amplifier 14 is connected with, data collecting card 8 is connected with data conversion port 15, and data conversion port 15 is connected with frequency spectrograph
16, RF tag 17 is provided with data storage 4, RF tag 17 is connected with data receiver 18, the work of local oscillator 12
Working frequency is to be provided with host computer 19 in 9.55GHz, wireless communication module 5, and host computer 19 is connected with network adapter 2, network
Adapter 2 is connected with gateway 21.
The present invention has used microstrip filter, and most basic wave filter is micro-strip LPF in the middle of microstrip filter
Device, and other types of wave filter can by the prototype of low pass filter it is transformed come.Maximum flat filter and Qie Bixue
Husband's wave filter is two kinds of prototypes of conventional low pass filter.Simplest wave filter is exactly in parallel with open circuit in microstrip filter
Stub short circuit connects stub to realize the function of filtering instead of the electric capacity or inductance of lump component.The present invention
Use the microstrip bandpass filter based on inductive coupled quarter-wave resonance device.
When the present invention is used, interference signal is detected by corresponding signal transducer, due to interference signal and normal signal
Simultaneous frequency spectrum, shows in frequency spectrograph and is higher by even several times of the signal to noise ratio again of normal signal one, it is possible thereby to logical
The intensity of detection signal is crossed, as the standard that detection interference source whether there is.When dsp chip is detected with the presence of relevant interference source
When.By the control of dsp chip, selection circuit, the corresponding anti-interference microstrip filter of selection realizes anti-interference function, when dry
When disturbing source disappearance or not detecting interference source, normal microstripline filter is selected.
Dsp chip used in the present invention uses ADSP-BF533 cake cores, up to 600 MHz high-performance Blackfin
Processor, 2 16 bit macs, 2 40 ALU, 48 digital video ALU, and 1 40 bit shift device, RISC-style register and refer to
Model is made, programming is simple, and translation and compiling environment is friendly, advanced debugging, tracking and performance monitoring, core voltage VDD0.8V-1.2V,
Piece internal pressure-regulating device supports the input voltage from 3.3V-2.5V, and Memory Controller can be seamless with SDRAM, SRAM, Flash and ROM
Connection, flexible memory bootmode can select to be imported from SPI mouthfuls or external memory storage, and parallel Peripheral Interface (PPI)/
GPIO supports that ITU-R656 video data formats, 2 binary channels full duplex synchronous serial interfaces support 8 stereo I2S passages
12 channel DMA controllers, parallel Peripheral Interface (PPI)/GPIO supports ITU-R656 2 binary channels full duplexs of video data format
Synchronous serial interface, supports 8 stereo channel DMA controllers of I2S passages 12.
The present invention is analyzed, effective detection signal by application dsp chip to the interference signal that tuner is received
Intensity, determines interference source, controls circuit to select by dsp chip, and anti-interference process is realized using wave filter, and by suitable
Amplifier realizes the output of signal, it is ensured that the normal of tuner is used, and is worthy to be popularized.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of tuner processing system based on dsp chip, it includes dsp chip（1）, it is characterised in that：The dsp chip
（1）It is connected with signal acquisition module（2）, RF output ports（3）, data storage（4）With wireless communication module（5）, the letter
Number acquisition module（2）Inside it is provided with signal transducer group（6）, the signal transducer group（6）It is connected with converter（7）, institute
State converter（7）It is connected with data collecting card（8）, the RF output ports（3）It is connected with low noise amplifier（9）, it is described low
Make an uproar amplifier（9）It is connected with microstrip filter（10）, the microstrip filter（10）It is connected with frequency mixer（11）, the frequency mixer
（11）It is connected with local oscillator（12）With intermediate-frequency filter（13）, the intermediate-frequency filter（13）It is connected with intermediate frequency amplifier
（14）.
2. a kind of tuner processing system based on dsp chip according to claim 1, it is characterised in that：The data
Capture card（8）It is connected with data conversion port（15）, the data conversion port（15）It is connected with frequency spectrograph（16）.
3. a kind of tuner processing system based on dsp chip according to claim 1, it is characterised in that：The data
Memory（4）Inside it is provided with RF tag（17）, the RF tag（17）It is connected with data receiver（18）.
4. a kind of tuner processing system based on dsp chip according to claim 1, it is characterised in that：It is described local
Oscillator（12）Working frequency is 9.55GHz.
5. a kind of tuner processing system based on dsp chip according to claim 1, it is characterised in that：It is described wireless
Communication module（5）Inside it is provided with host computer（19）, the host computer（19）It is connected with network adapter（20）, the Network adaptation
Device（20）It is connected with gateway（21）.
6. a kind of tuner processing system based on dsp chip according to claim 1, it is characterised in that：The micro-strip
Wave filter（10）Using the microstrip bandpass filter based on inductive coupled quarter-wave resonance device.
7. a kind of tuner processing system based on dsp chip according to claim 1, it is characterised in that：The DSP cores
Piece uses ADSP-BF533 cake cores, up to 600 MHz high-performance Blackfin processors, 2 16 bit macs, 2 40
ALU, 48 digital video ALU, and 1 40 bit shift device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093669.5A CN106686330A (en) | 2016-12-02 | 2016-12-02 | High-frequency head processing system based on DSP chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093669.5A CN106686330A (en) | 2016-12-02 | 2016-12-02 | High-frequency head processing system based on DSP chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106686330A true CN106686330A (en) | 2017-05-17 |
Family
ID=58866316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611093669.5A Pending CN106686330A (en) | 2016-12-02 | 2016-12-02 | High-frequency head processing system based on DSP chip |
Country Status (1)
| Country | Link |
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| CN (1) | CN106686330A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254745A (en) * | 2018-03-16 | 2018-07-06 | 成都锦江电子系统工程有限公司 | The radio frequency microwave system of plant detections of radar is floated applied to water |
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| CN101478656A (en) * | 2008-12-15 | 2009-07-08 | 北京创毅视讯科技有限公司 | Co-channel interference filtering method and apparatus therefor |
| US20090181629A1 (en) * | 2004-01-20 | 2009-07-16 | Broadcom Corporation | Direct Digital Conversion Tuner and Method for Using Same |
| CN201717785U (en) * | 2010-04-30 | 2011-01-19 | 青岛海信电器股份有限公司 | Direct current voltage booster circuit and television comprising same |
| CN202794515U (en) * | 2012-05-11 | 2013-03-13 | 青岛瑞普电气有限责任公司 | Navigation radar for FMCW (frequency-modulated continuous wave) ship |
| CN105553494A (en) * | 2016-01-18 | 2016-05-04 | 广州慧睿思通信息科技有限公司 | Radio frequency front-end frequency selection circuit and signal receiving method thereof |
-
2016
- 2016-12-02 CN CN201611093669.5A patent/CN106686330A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090181629A1 (en) * | 2004-01-20 | 2009-07-16 | Broadcom Corporation | Direct Digital Conversion Tuner and Method for Using Same |
| CN101478656A (en) * | 2008-12-15 | 2009-07-08 | 北京创毅视讯科技有限公司 | Co-channel interference filtering method and apparatus therefor |
| CN201717785U (en) * | 2010-04-30 | 2011-01-19 | 青岛海信电器股份有限公司 | Direct current voltage booster circuit and television comprising same |
| CN202794515U (en) * | 2012-05-11 | 2013-03-13 | 青岛瑞普电气有限责任公司 | Navigation radar for FMCW (frequency-modulated continuous wave) ship |
| CN105553494A (en) * | 2016-01-18 | 2016-05-04 | 广州慧睿思通信息科技有限公司 | Radio frequency front-end frequency selection circuit and signal receiving method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254745A (en) * | 2018-03-16 | 2018-07-06 | 成都锦江电子系统工程有限公司 | The radio frequency microwave system of plant detections of radar is floated applied to water |
| CN108254745B (en) * | 2018-03-16 | 2023-09-29 | 成都锦江电子系统工程有限公司 | Radio frequency microwave system applied to radar detection of water-float plants |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170517 |
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| RJ01 | Rejection of invention patent application after publication |