CN206341240U - A kind of demodulator for VDE systems - Google Patents
A kind of demodulator for VDE systems Download PDFInfo
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- CN206341240U CN206341240U CN201621299312.8U CN201621299312U CN206341240U CN 206341240 U CN206341240 U CN 206341240U CN 201621299312 U CN201621299312 U CN 201621299312U CN 206341240 U CN206341240 U CN 206341240U
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Abstract
The utility model discloses a kind of demodulator for VDE systems, it recovers and correction verification module including Digital Down Convert DDC, oscillator, regulation switch, multiphase filter, 32 DFT blocks, balanced device, mapping block, No. 32 parallel-to-serial converters, Turbo decoder modules, base band frames；The utility model uses filter bank multi-carrier modulation technique, whole bandwidth is divided into by several subbands by wave filter group, information is transmitted on subband, wherein each subcarrier has a wave filter, it serves the strict restriction effect to each subcarrier spectrum, so that not interfered with substantially between subcarrier, pass through the filtering of the wave filter in different center frequency, realize the substantially nonoverlapping signal transmission of intersubband, play a part of suppressing Image interference and adjacent channel interference, the utility model improves the communication quality of demodulating system.
Description
Technical field
The utility model is related to marine communication field, specifically a kind of demodulator for VDE systems.
Background technology
With the development of maritime communication technology, very high frequency(VHF) data exchange system（VHF Data Exchange System）Quilt
Industry is known as ship automatic identification system of future generation, represents the developing direction of following overocean communications technology.VDES is to be directed to
The system that AIS strengthens and upgraded, in world's radio communication in 2012（WRC-12）Conference is proposed first.VDES generation and hair
Exhibition is all closely related with AIS, and it is short that bank base AIS systems are limited by communication distance, and Content of Communication is simple, with AIS systems in VHF frequently
The increase of section communication requirement, it is very crowded in the usable frequency range of AIS systems, reached at many busy harbours pair
The occupancy of frequency range more than 50%, international navigation mark tissue（IALA）Propose when the load of AIS data link is more than 50%, it will cause
The generation of the problems such as information occlusion, has a strong impact on navigation safety.
Compared to AIS systems, the communication link of VDES systems more enriches, and is added on the basis of original broadcast channel
VDE communication channel, moreover, VDES systems just consider ground and the big system of satellite two also at the beginning of design, in system
Design and compatibility aspect can meet the demand of following complicated, multi-functional maritime communication systems.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art there is provided a kind of demodulator for VDE systems, with
At least up to prevent carrier-in-interference, suppress Image interference and adjacent channel interference, the effect for improving communication quality.
The purpose of this utility model is achieved through the following technical solutions：A kind of demodulator for VDE systems, it
Including Digital Down Convert DDC, oscillator, regulation switch, multiphase filter, 32 DFT blocks, balanced device, mapping block, 32 tunnels
Parallel-to-serial converter, Turbo decoder modules, base band frame recover and correction verification module；Digital Down Convert DDC digital input end is with shaking
The frequency oscillator signal output end connection of device is swung, Digital Down Convert DDC output end can be with multichannel multiphase by adjusting switch
The input connection of wave filter, the input of the output end of multiphase filter respectively with 32 DFT blocks is connected, 32 point DFT moulds
Input of the output end of block respectively with multichannel balanced device is connected, and the output end per road balanced device is defeated with corresponding mapping block
Enter end connection, the output end of multichannel mapping block is connected with the input of No. 32 parallel-to-serial converters, No. 32 parallel-to-serial converters it is defeated
Go out end to be connected with the input of Turbo decoder modules, the output end of Turbo decoder modules is recovered and correction verification module with base band frame
Input connection；
The Digital Down Convert DDC enters after receiving modulated signal under frequency oscillator signal regulation to modulation signal data
Row processing, the signal data after processing is connected by adjusting switch with multichannel multiphase filter, is switched and selected by described regulation
The multiphase filter all the way of the correspondence that is filtered of signal data after processing is selected, multiphase filter is filtered place to signal data
32 DFT blocks are transferred to after reason to carry out being output to multichannel balanced device progress equilibrium treatment after Fast Fourier Transform (FFT), it is described
Multichannel balanced device exports balanced later data to corresponding mapping block respectively, and mapping block is carried out after mapping relations correspondence
No. 32 parallel-to-serial converters are output to, the signal data after parallel-serial conversion is output to the decoding of Turbo decoder modules, after decoding
Data transfer to base band frame recover with correction verification module processing after export demodulated signal.
Described mapping block at least 32.
32 described DFT blocks include 32 multiphase filter tie points.
Described No. 32 parallel-to-serial converters carry out symbol parallel-serial conversion according to number of carrier wave and modulated signal ratio.
Described Turbo decoder modules are with outer Turbo FEC coding modules.
The direct control type Digital Down Convert that described Digital Down Convert DDC is driven by data signal.
The beneficial effects of the utility model are：The utility model uses filter bank multi-carrier modulation technique, passes through filtering
Whole bandwidth is divided into several subbands by device group, and information is transmitted on subband, wherein each subcarrier has a filtering
Device, it serves the strict restriction effect to each subcarrier spectrum so that do not interfered with substantially between subcarrier, by
The filtering of the wave filter of different center frequency, realizes the substantially nonoverlapping signal transmission of intersubband, plays suppression Image interference
The effect disturbed with adjacent channel, the utility model improves the communication quality of demodulating system.
Brief description of the drawings
Fig. 1 is demodulation principle figure of the present utility model；
Fig. 2 is structural representation of the present utility model.
Embodiment
The technical solution of the utility model, but protection domain of the present utility model are described in further detail below in conjunction with the accompanying drawings
It is not limited to as described below.
Such as Fig. 1, shown in 2, a kind of demodulator for VDE systems, it is opened including Digital Down Convert DDC, oscillator, regulation
Pass, multiphase filter, 32 DFT blocks, balanced device, mapping block, No. 32 parallel-to-serial converters, Turbo decoder modules, base band
Frame recovers and correction verification module；Digital Down Convert DDC digital input end and the frequency oscillator signal output end of oscillator are connected, number
Word down coversion DDC output end can be connected by adjusting switch with the input of multichannel multiphase filter, multiphase filter
Input of the output end respectively with 32 DFT blocks is connected, the input of the output ends of 32 DFT blocks respectively with multichannel balanced device
End connection, the output end per road balanced device is connected with the input of corresponding mapping block, the output end of multichannel mapping block and
The input connection of No. 32 parallel-to-serial converters, the output end of No. 32 parallel-to-serial converters connects with the input of Turbo decoder modules
Connect, output end and the base band frame of Turbo decoder modules recover to be connected with the input of correction verification module；
The Digital Down Convert DDC enters after receiving modulated signal under frequency oscillator signal regulation to modulation signal data
Row processing, the signal data after processing is connected by adjusting switch with multichannel multiphase filter, is switched and selected by described regulation
The multiphase filter all the way of the correspondence that is filtered of signal data after processing is selected, multiphase filter is filtered place to signal data
32 DFT blocks are transferred to after reason to carry out being output to multichannel balanced device progress equilibrium treatment after Fast Fourier Transform (FFT), it is described
Multichannel balanced device exports balanced later data to corresponding mapping block respectively, and mapping block is carried out after mapping relations correspondence
No. 32 parallel-to-serial converters are output to, the signal data after parallel-serial conversion is output to the decoding of Turbo decoder modules, after decoding
Data transfer to base band frame recover with correction verification module processing after export demodulated signal.
Described mapping block at least 32.
32 described DFT blocks include 32 multiphase filter tie points.
Described No. 32 parallel-to-serial converters carry out symbol parallel-serial conversion according to number of carrier wave and modulated signal ratio.
Described Turbo decoder modules are with outer Turbo FEC coding modules.
The direct control type Digital Down Convert that described Digital Down Convert DDC is driven by data signal.
Above content only describes general principle of the present utility model and main feature.The technical staff of the industry should
Solve, do not departing from the spirit and scope that the utility model appended claims are limited, formally with it is right in details
The change that the utility model is made, in the utility model scope of the claimed protection.
Claims (6)
1. a kind of demodulator for VDE systems, it is characterised in that：It include Digital Down Convert DDC, oscillator, regulation switch,
Multiphase filter, 32 DFT blocks, balanced device, mapping block, No. 32 parallel-to-serial converters, Turbo decoder modules, base band frames are extensive
Multiple and correction verification module；Digital Down Convert DDC digital input end and the frequency oscillator signal output end of oscillator are connected, under numeral
Frequency conversion DDC output end can be connected by adjusting switch with the input of multichannel multiphase filter, the output of multiphase filter
Input respectively with 32 DFT blocks is held be connected, the input company of the output ends of 32 DFT blocks respectively with multichannel balanced device
Connect, the output end per road balanced device is connected with the input of corresponding mapping block, the output end of multichannel mapping block and 32 tunnels
The input connection of parallel-to-serial converter, the output end of No. 32 parallel-to-serial converters is connected with the input of Turbo decoder modules,
The output end of Turbo decoder modules is recovered to be connected with the input of correction verification module with base band frame；
The Digital Down Convert DDC receives modulated signal later under frequency oscillator signal regulation to modulating at signal data progress
Reason, the signal data after processing is connected by adjusting switch with multichannel multiphase filter, is switched by described regulation at selection
The correspondence that signal data after reason is filtered multiphase filter all the way, multiphase filter is filtered after processing to signal data
32 DFT blocks are transferred to carry out being output to multichannel balanced device progress equilibrium treatment, described multichannel after Fast Fourier Transform (FFT)
Balanced device exports balanced later data to corresponding mapping block respectively, and mapping block exported after mapping relations correspondence
To No. 32 parallel-to-serial converters, the signal data after parallel-serial conversion is output to the decoding of Turbo decoder modules, decoded number
Recover according to base band frame is transferred to exporting demodulated signal after correction verification module processing.
2. a kind of demodulator for VDE systems according to claim 1, it is characterised in that：Described mapping block is extremely
It is few 32.
3. a kind of demodulator for VDE systems according to claim 1, it is characterised in that：32 described DFT blocks
Including 32 multiphase filter tie points.
4. a kind of demodulator for VDE systems according to claim 1, it is characterised in that：Described 32 tunnels and string turn
Parallel operation carries out symbol parallel-serial conversion according to number of carrier wave and modulated signal ratio.
5. a kind of demodulator for VDE systems according to claim 1, it is characterised in that：Described Turbo decodings
Module is with outer Turbo FEC coding modules.
6. a kind of demodulator for VDE systems according to claim 1, it is characterised in that：Described Digital Down Convert
The direct control type Digital Down Convert that DDC is driven by data signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621299312.8U CN206341240U (en) | 2016-11-30 | 2016-11-30 | A kind of demodulator for VDE systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201621299312.8U CN206341240U (en) | 2016-11-30 | 2016-11-30 | A kind of demodulator for VDE systems |
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| CN206341240U true CN206341240U (en) | 2017-07-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400860A (en) * | 2018-05-09 | 2018-08-14 | 浙江赛威通信技术有限公司 | Distributed channel system and method |
| CN111431579A (en) * | 2020-03-18 | 2020-07-17 | 上海航天电子通讯设备研究所 | Low-delay VDE satellite-borne downlink digital signal processing system based on FPGA |
| CN115276763A (en) * | 2022-06-30 | 2022-11-01 | 成都天奥信息科技有限公司 | Ship/standard load VDES system communication terminal |
-
2016
- 2016-11-30 CN CN201621299312.8U patent/CN206341240U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400860A (en) * | 2018-05-09 | 2018-08-14 | 浙江赛威通信技术有限公司 | Distributed channel system and method |
| CN111431579A (en) * | 2020-03-18 | 2020-07-17 | 上海航天电子通讯设备研究所 | Low-delay VDE satellite-borne downlink digital signal processing system based on FPGA |
| CN115276763A (en) * | 2022-06-30 | 2022-11-01 | 成都天奥信息科技有限公司 | Ship/standard load VDES system communication terminal |
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Address after: No.2 Tianyu Road, high tech Zone, Chengdu, Sichuan 610000 Patentee after: GUORONG TECHNOLOGY CO.,LTD. Address before: No.2 Tianyu Road, high tech Zone, Chengdu, Sichuan 610000 Patentee before: CHENGDU GUORONG TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220705 Address after: 518000 404, building 37, chentian Industrial Zone, chentian community, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Huaxun ark Photoelectric Technology Co.,Ltd. Address before: No.2 Tianyu Road, high tech Zone, Chengdu, Sichuan 610000 Patentee before: GUORONG TECHNOLOGY CO.,LTD. |