CN105871490B - A kind of DRM digital dispatching systems receiver - Google Patents
A kind of DRM digital dispatching systems receiver Download PDFInfo
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- CN105871490B CN105871490B CN201610336701.1A CN201610336701A CN105871490B CN 105871490 B CN105871490 B CN 105871490B CN 201610336701 A CN201610336701 A CN 201610336701A CN 105871490 B CN105871490 B CN 105871490B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
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- Engineering & Computer Science (AREA)
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
The present invention relates to a kind of DRM digital dispatching systems receiver, including casing, it is equipped with broadcast receiving circuit, power supply unit and output unit in casing, broadcast receiving circuit includes：Tuner, priority block, low-pass filter, A/D converter, OFDM modulators, synchronous demodulator, channel estimation module, channel equalization module, channel decoder, demultiplexer, audio decoder and data decoder；The present invention can be used as the digital receiving terminal of digital AM emission systems and inexpensive tele-medicine, long-distance education, and especially in the reception of digital AM emergent broadcasts, the radiodigital audio and broadcast videography of unique low cost are provided for a wide range of disaster relief work.
Description
Technical field
The present invention relates to a kind of DRM digital dispatching systems receivers, belong to digital radio broadcasting field.
Background technology
Existing simulation AM broadcast receivers can only receive audio signal, and audio is very poor, there is poor transmission,
Business sheet one and be easily disturbed etc. inherent shortcomings, therefore broadcasting listener's number is low, with DTV, digital satellite broadcasting,
The appearance of the Novel Deliveries means such as multimedia broadcasting and internet, amplitude modulation broadcasting are faced with increasingly stern challenge, situation
It is increasingly difficult.
DRM is a kind of broadcast technology, is the unique universal non-special of shortwave, medium wave and long range digital sound radio frequency range
Existing amplitude modulation (AM) broadcast band (30 MHz or less) can be efficiently used in sharp digital radio broadcasting system, DRM, and
DRM broadcast sound quality is significantly better than AM broadcast, and sound quality is pure, clean background, when that cannot receive, not annoying background noise,
It may replace the intermediate waves broadcast of simulation in the future, while video, audio and other data can be transmitted in the DRM system,
Strong with penetration capacity and diffracting power, the big feature of coverage area is suitable for mobile reception and portable receiver.
When the Sudden Public Crisis such as major natural disasters, accident, public health and social safety occur, meet an urgent need wide
A kind of faster message transmission channel can be provided by broadcasting, and harm caused by disaster message or disaster possibility is transmitted to common people's hand
In, emergent broadcast has the special amplitude-modulated signal different from general broadcast, and then current broadcasting receiver can not be at the first time
Emergent broadcast signal is intercepted, is transmitted to cannot achieve emergent broadcast, life and property loss is preferably minimized.
Invention content
The purpose of the present invention is in view of the drawbacks of the prior art, providing a kind of DRM digital dispatching systems receiver, can use
The digital receiving terminal for making number AM emission systems and inexpensive tele-medicine, long-distance education, especially connects in digital AM emergent broadcasts
In receipts, the radiodigital audio and broadcast videography of unique low cost are provided for a wide range of disaster relief work.
The present invention is achieved by the following technical solutions：
A kind of DRM digital dispatching systems receiver, including casing, the casing is interior to be equipped with broadcast receiving circuit, power supply list
Member and output unit, the broadcast receiving circuit include：
Tuner is configured as through main carrier frequency solution mode pulse reception of amplitude-modulated signals；Priority block, be configured as by
Emergent broadcast signal in amplitude-modulated signal be placed in preferential group, other signals be placed in second level, and shield the signal of second level,
Release the signal preferentially organized；Low-pass filter is configured as that the signal less than cutoff frequency is allowed to pass through；A/D converter, by with
It is set to and amplitude-modulated signal is converted into digital signal；OFDM modulators are configured as believing number using Orthodoxy Frequency Division Multiplex
Number be translated into can along the pulse signal that transmits, the OFDM modulators further include Fourier transform（FFT）Operation, for obtaining one
The data of a symbol；Synchronous demodulator is configured as pulse signal reverting to digital signal；Channel estimation module is configured
Channel information is estimated for the pulse signal to receiving；Channel equalization module is configured as carrying out equilibrium to channel information with school
Positive channel distortion；Channel decoder is configured as the channel information after correcting and carries out channel decoding, and adjudicates decoding；Xie Duo
Path multiplexer is configured as that the signal after channel decoding is reverted to the progress of binary data sequence by parallel serial conversion while passing
Defeated, the binary data sequence includes audio data and data service, and the data service includes image data and lteral data；
Audio decoder is decoded audio data；Data decoder is decoded data service；
The power supply unit is connected with control circuit and output unit, the output unit and audio decoder and data solution
Code device is connected.
Above-mentioned a kind of DRM digital dispatching systems receiver, wherein the cabinet top is equipped with film key plate, the machine
Shell includes procapsid and back casing, and the procapsid surface is equipped with sound window, display window, volume adjustment knob and state display lamp,
There are two the louvers, and is located at display window both sides, and the procapsid side is equipped with earpiece holes, S/PDIF digital audio connects
Mouth, power switch, charging indicator light and charging hole, the other side are equipped with external frequency-modulated antenna socket, and the power switch, charging are aobvious
Show that lamp and charging hole are connected with power supply unit, storage card plug is equipped at the top of the procapsid, if the back casing surface is equipped with
Dry thermovent, the back casing top are equipped with antenna and lift-pull handle, and the lift-pull handle both sides are hinged with back casing, described to carry
It pulls handle and is equipped with several holding recesses.
Above-mentioned a kind of DRM digital dispatching systems receiver, wherein the casing is externally provided with waterproof layer.
Above-mentioned a kind of DRM digital dispatching systems receiver, wherein the output unit includes loudspeaker unit and display
Screen, the loudspeaker unit are located at sound window, and the display location is at display window.
Above-mentioned a kind of DRM digital dispatching systems receiver, wherein mobile module, the mobile phone are additionally provided in the casing
Module is connected with power supply unit, and control module, the control module and film are equipped between the mobile module and output unit
Keypad is connected.
Beneficial effects of the present invention are：
In being received present invention can apply to digital AM emergent broadcasts, by priority block, other signals are shielded, by amplitude modulation
Emergent broadcast signal in signal as priority release by signal, facilitates and automatically switches radio station, is intercepted in amplitude-modulated signal between first
The distinctive signal of emergent broadcast sends out alarm tone at the first moment that earthquake and tsunami occur by digital am emergency set,
Sound and picture and text message, the act of rescue of notice surrounding population, escape are transmitted to earthquake or the disaster-stricken crowd of tsunami.
The sound quality that the present invention exports carries significantly than CD Quality, the sound quality of the audio signal of opposite traditional analog AM broadcast
It is high；In terms of facsimile signal is received with display, resolution can reach 320x480 pixels, change traditional analog AM broadcast without figure
The receiving pattern of literary signal, while can receive 6500 kilometer range of transmitting antenna radius of digital dispatching system transmitting base station
Interior mobile reception Digital AM Broadcasting signal, and signal stabilization, to provide the nothing of unique low cost for a wide range of disaster relief work
Line electricity digital audio and broadcast videography.
The present invention is user-friendly, and waterproof layer design contributes to receiver to alarm under water, and mobile module facilitates offer
Cell-phone function, improves receiver function, and the present invention can be used as the digital receiving terminal production of following Digital AM Broadcasting emission system
Product, and realize inexpensive tele-medicine, the digital receiving terminal product of long-distance education.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is casing front view of the present invention.
Fig. 3 is casing left view of the present invention.
Fig. 4 is casing right view of the present invention.
Fig. 5 is the attached view of casing of the present invention.
Fig. 6 is casing rearview of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings.
A kind of DRM digital dispatching systems receiver, including casing 1,1 top of the casing are equipped with film key plate 2, institute
It includes procapsid 3 and back casing 4 to state casing 1, and 4 surface of the procapsid is equipped with sound window 5, display window 6,7 and of volume adjustment knob
State display lamp 8, there are two the louvers 5, and is located at 6 both sides of display window, 4 side of the procapsid be equipped with earpiece holes 9,
S/PDIF digital audio interfaces 10, power switch 11, charging indicator light 12 and charging hole 13, the power switch 11, charging are aobvious
Show that lamp 12 and charging hole 13 are connected with power supply unit 22, the other side is equipped with external frequency-modulated antenna socket 14,3 top of the procapsid
Equipped with storage card plug 15,4 surface of the back casing is equipped with several thermovents 16, and 4 top of the back casing is equipped with 17 He of antenna
Lift-pull handle 18,18 both sides of the lift-pull handle are hinged with back casing 4, and the lift-pull handle 18 is equipped with several holding recesses
19, the casing 1 is externally provided with waterproof layer 20；
The waterproof layer 20 is by epoxy resin, acrylic resin, odium stearate, nano silicon dioxide, nanometer basic zirconium phosphate, chromium
Powder, boron powder, silane coupling agent kh560 and antioxidant 1010 are made, and the epoxy resin, odium stearate, is received acrylic resin
Rice silica, nanometer basic zirconium phosphate, chromium powder, boron powder, silane coupling agent kh560 and antioxidant 1010 mass ratio be 30:25:
15:20:11:13:5:7:3:2, the mixing of odium stearate, nano silicon dioxide, nanometer basic zirconium phosphate, chromium powder and boron powder is mixed well, is added
Enter to epoxy resin, acrylic resin and antioxidant 1010 to be kneaded to be kneaded again in the mixture after mixing well and mix well, then sprays
It is applied to casing surface；
Broadcast receiving circuit 21, power supply unit 22 and output unit 23, the broadcast receiving circuit are equipped in the casing 1
21 include：
Tuner 24 is configured as through main carrier frequency solution mode pulse reception of amplitude-modulated signals；
Priority block 25 is configured as the emergent broadcast signal in amplitude-modulated signal is placed in preferential group, other signals set
In second level, and the signal of second level is shielded, releases the signal preferentially organized；
Low-pass filter 26 is configured as that the signal less than cutoff frequency is allowed to pass through；
A/D converter 27 is configured as amplitude-modulated signal being converted into digital signal；
OFDM modulators 28 are configured as that digital signal is translated into the arteries and veins that can be transmitted along the line using Orthodoxy Frequency Division Multiplex
Signal is rushed, the OFDM modulators further include Fourier transform（FFT）Operation 29 obtains the data of a symbol；
Synchronous demodulator 30 is configured as pulse signal reverting to digital signal；
Channel estimation module 31 is configured as estimating channel information to the pulse signal of receiving；
Channel equalization module 32 is configured as carrying out equilibrium to channel information with corrects channel distortions；
Channel decoder 33 is configured as the channel information after correcting and carries out channel decoding, and adjudicates decoding；
Demultiplexer 34 is configured as that the signal after channel decoding is reverted to binary data sequence by parallel serial conversion
Row carry out simultaneous transmission, and the binary data sequence includes audio data and data service, and the data service includes picture number
According to and lteral data；
Audio decoder 35, is decoded audio data；
Data decoder 36, is decoded data service；
The tuner 24, priority block 25, low-pass filter 26, A/D converter 27, OFDM modulators 28, channel
Estimation module 31, channel equalization module 32, channel decoder 33, demultiplexer 34 are sequentially connected, the synchronous demodulator
30 is in parallel with OFDM modulators 28, and the audio decoder 35 and data decoder 36 are connected with demultiplexer 34；
The power supply unit 22 is connected with control circuit 21 and output unit 23, the output unit 23 and audio decoder
35 are connected with data decoder 36, and the output unit 23 includes loudspeaker unit 37 and display screen 38, the loudspeaker unit
37 are located at sound window 5, and the display screen 38 is located at display window 6, and mobile module 39, the mobile phone are additionally provided in the casing 1
Module 39 is connected with power supply unit 22, and control module 40, the control are equipped between the mobile module 39 and output unit 23
Module 40 is connected with film key plate 2.
The present invention working method be：
The amplitude modulation sent out by digital dispatching system transmitting base station（AM）Signal is received, amplitude modulation by antenna and tuner
（AM）Signal includes digital signal and analog signal, and priority block is by amplitude modulation（AM）Emergent broadcast signal conduct in signal
It is preferential to release, it realizes emergent broadcast signal intercept, automatically switches radio station, subsequent low-pass filter filters amplitude-modulated signal, then by A/D
Analog signal in low-pass filtering is converted to digital signal by converter, and original signal is divided into N number of subsignal by OFDM modulators,
Chip rate after segmentation is original 1/N, is then gone to modulate N number of mutually orthogonal subcarrier respectively with N subsignals, then pass through
Signal, is become from time domain that frequency domain is consistent by FFT operations, obtains the data of a symbol, while synchronous demodulator modulates OFDM
The modulated signal of device carries out demodulation reduction, then is exported by OFDM modulators, to eliminate the interference between signal waveform, improves frequency
Utilization rate is composed, then is come out from the model parameter estimation for receiving some channel model that it will be assumed in data by channel estimation module,
Channel equalization module carries out equilibrium to the data obtained, with corrects channel distortions, passes through channel decoder and carries out channel decoding, restore
Then signal originally, row decoding of going forward side by side judgement revert to binary data sequence by the signal after channel decoding and carry out simultaneously
Transmission, and by audio decoder and data decoder decoding after, export digital audio and digital graphical signal, pass through film key
Plate controls control module and realizes mobile module switching, and by output unit output information.
Waterproof layer of the present invention reach IP67 rank waterproofs, can make casing have superelevation waterproof, it is wear-resisting pressure resistance, it is anti-
Impact, corrosion resistance, float automatically after entering water, and have certain self-regeneration, sea water advanced up to still may be used under 500m
Realize underwater alarm.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
Should all it cover within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection domain of claims
Subject to.
Claims (4)
1. a kind of DRM digital dispatching systems receiver, including casing, it is characterized in that, broadcast reception electricity is equipped in the casing
Road, power supply unit and output unit, the broadcast receiving circuit include：
Tuner is configured as through main carrier frequency solution mode pulse reception of amplitude-modulated signals；
Priority block, be configured as by the emergent broadcast signal in amplitude-modulated signal be placed in preferential group, other signals be placed in second
Rank, and the signal of second level is shielded, release the signal preferentially organized；Low-pass filter is configured as allowing to be less than cutoff frequency
The signal of rate passes through；
A/D converter is configured as amplitude-modulated signal being converted into digital signal；
OFDM modulators are configured as that digital signal is translated into the pulse letter that can be transmitted along the line using Orthodoxy Frequency Division Multiplex
Number, the OFDM modulators further include Fourier transform（FFT）Operation, the data for obtaining a symbol；
Synchronous demodulator is configured as pulse signal reverting to digital signal；
Channel estimation module is configured as estimating channel information to the pulse signal of receiving；
Channel equalization module is configured as carrying out equilibrium to channel information with corrects channel distortions；
Channel decoder is configured as the channel information after correcting and carries out channel decoding, and adjudicates decoding；
Demultiplexer is configured as that the signal after channel decoding is reverted to the progress of binary data sequence by parallel serial conversion
Simultaneous transmission, the binary data sequence include audio data and data service, and the data service includes image data and text
Digital data；
Audio decoder is decoded audio data；Data decoder is decoded data service；
The power supply unit is connected with control circuit and output unit；
The output unit is connected with audio decoder and data decoder.
2. a kind of DRM digital dispatching systems receiver as described in claim 1, it is characterized in that, the casing is externally provided with waterproof
Layer.
3. a kind of DRM digital dispatching systems receiver as described in claim 1, it is characterized in that, the output unit includes raising
Sound device unit and display screen.
4. a kind of DRM digital dispatching systems receiver as described in claim 1, it is characterized in that, it is additionally provided with hand in the casing
Machine module, the mobile module are connected with power supply unit, and control module is equipped between the mobile module and output unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610336701.1A CN105871490B (en) | 2016-05-20 | 2016-05-20 | A kind of DRM digital dispatching systems receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610336701.1A CN105871490B (en) | 2016-05-20 | 2016-05-20 | A kind of DRM digital dispatching systems receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105871490A CN105871490A (en) | 2016-08-17 |
| CN105871490B true CN105871490B (en) | 2018-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610336701.1A Expired - Fee Related CN105871490B (en) | 2016-05-20 | 2016-05-20 | A kind of DRM digital dispatching systems receiver |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108513091A (en) * | 2018-06-01 | 2018-09-07 | 镇江乾坤传媒科技有限公司 | One kind is based on the fixed receiver terminal device of digital medium wave channel viewdata |
| CN108848467A (en) * | 2018-06-01 | 2018-11-20 | 镇江乾坤传媒科技有限公司 | One kind is based on digital medium wave channel viewdata movable type receiver terminal device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101136887A (en) * | 2007-09-29 | 2008-03-05 | 天津大学 | DRM receiver radio frequency receiving front-end circuit |
| CN101459481A (en) * | 2008-12-23 | 2009-06-17 | 成都纽斯达电子有限责任公司 | General purpose radio for amplitude modulation, frequency modulation and DRM |
| CN103491419A (en) * | 2013-09-03 | 2014-01-01 | 深圳市同洲电子股份有限公司 | Method and digital receiving terminal for sending emergency broadcasts |
| CN104660357A (en) * | 2015-03-11 | 2015-05-27 | 四川九州电子科技股份有限公司 | Multi-channel emergency broadcast intelligent terminal system and control method based on priority |
| CN205992904U (en) * | 2016-05-20 | 2017-03-01 | 镇江阿翁电子科技有限公司 | A kind of DRM digital dispatching system receiver |
-
2016
- 2016-05-20 CN CN201610336701.1A patent/CN105871490B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101136887A (en) * | 2007-09-29 | 2008-03-05 | 天津大学 | DRM receiver radio frequency receiving front-end circuit |
| CN101459481A (en) * | 2008-12-23 | 2009-06-17 | 成都纽斯达电子有限责任公司 | General purpose radio for amplitude modulation, frequency modulation and DRM |
| CN103491419A (en) * | 2013-09-03 | 2014-01-01 | 深圳市同洲电子股份有限公司 | Method and digital receiving terminal for sending emergency broadcasts |
| CN104660357A (en) * | 2015-03-11 | 2015-05-27 | 四川九州电子科技股份有限公司 | Multi-channel emergency broadcast intelligent terminal system and control method based on priority |
| CN205992904U (en) * | 2016-05-20 | 2017-03-01 | 镇江阿翁电子科技有限公司 | A kind of DRM digital dispatching system receiver |
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| CN105871490A (en) | 2016-08-17 |
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Effective date of registration: 20170223 Address after: Zhenjiang City, Jiangsu Province, the Yangtze River Road 212000 Runzhou district and the rivers 001 room 1103 Applicant after: Zhenjiang Qiankun Electronic Technology Co.,Ltd. Address before: Zhenjiang City, Jiangsu Province, the Yangtze River Road 212001 Runzhou district and the rivers 001 room 1103 Applicant before: ZHENJIANG AWENG ELECTRONIC TECHNOLOGY Co.,Ltd. |
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