CN107070834A - Multiple channel demodulation method based on multichannel communication reception system - Google Patents
Multiple channel demodulation method based on multichannel communication reception system Download PDFInfo
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- CN107070834A CN107070834A CN201710070634.8A CN201710070634A CN107070834A CN 107070834 A CN107070834 A CN 107070834A CN 201710070634 A CN201710070634 A CN 201710070634A CN 107070834 A CN107070834 A CN 107070834A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
- H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Discrete Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Data are sent by steps such as DBPSK modulation the invention discloses a kind of multiple channel demodulation method based on multichannel communication reception system, including emitter.Present system performance is also better than existing system, inter-carrier interference is smaller, the time delay fed back by the larger technical problem of the expense and time delay of feedback control information, reduction overhead and reduction control information is prevented effectively from, the utilization rate of the descending power of system is improved.
Description
Technical field
The invention belongs to wireless communication technology field.Specifically related to a kind of multichannel based on multichannel communication reception system
Demodulation method.
Background technology
The multiple channel demodulation of multichannel communication reception system is the process for recovering message from the modulated signal for carrying message.
In various information transfers or processing system, the transmitting terminal message to be transmitted is modulated to carrier wave, is produced and is carried this
The signal of message.The message that receiving terminal must recover transmitted can just be used.First carrying use positioned at nearby carriers
Then the frequency spectrum shift of information filters out baseband signal into base band with corresponding wave filter, completes demodulation tasks.But multichannel
Resource allocation and other control information in communication receiving system are, it is necessary to which demodulation first could demodulate category on corresponding resource location
In the channel of itself.But in the prior art, inter-carrier interference is big, the overhead and time delay of this mode feedback control information
It is larger so that the utilization rate reduction of system.
The content of the invention
The invention aims to overcome a kind of above-mentioned not enough multichannel based on multichannel communication reception system of offer
Demodulation method.
A kind of multiple channel demodulation method based on multichannel communication reception system, comprises the following steps：
Emitter sends data and modulated by DBPSK；
Sampling Rate is promoted to by 819.2khz by Digital Up Convert；
It is modulated to 400hz carrier waves；
Multichannel down coversion receives data 1/2 and extracted, and Sampling Rate is reduced to 409.6khz；
Data to extraction are arranged；
Arrangement conversion is carried out to the data after extraction；
Phase compensation is carried out to arranging the data after conversion.
Further, the emitter sends the step of data are modulated by DBPSK and is specially：
Differential coding is obtained by differential encoder；
Level conversion is carried out, -1 is obtained ,+1 yard of information；
Carry out BPSK modulation and can obtain DBPSK modulated signals
Further, the data of described pair of extraction are specially the step of arrange：
The data of extraction are divided into every one group of 2048 data, then the traffic table of every group of data pick-up to association are obtained
Data；
If the data have existed and in more new state, have abandoned current business table, and enter next step；
During service data updating state, then original is extracted into data by new data cover, continue next step；
During service data updating state, proceed analysis to business datum, obtain is used to generate extraction number in traffic table
According to record；
Extracted according to data pick-up field contents, the data of metadata correspondence service fields are obtained, according to extraction
Data whether there is, and performs and updates operation；
Business datum state is judged, if business in the state of deletion, the then detailed table recorded data pick-up
The corresponding data record of table is deleted.
Further, described pair extract after data carry out arrange conversion the step of be specially：
Receive the data after extracting；
The extraction data of reception are copied as 2 parts, and are stored on two different addresses；
Carry out data storage；
Data to storage carry out FFT；
Export FFT result；
Final result output is carried out according to FFT output datas order；
When needing to complete at 1 point with 4 FFTs, 1 point data of input is copied as into 4 FFTs of progress after 4 points,
Then 1 FFT result is obtained to the data pick-up after conversion.
Further, it is specially to the process for arranging the data progress phase compensation after conversion：
Data phase difference after arrangement conversion between different communication node is offset by adjusting microwave；
If antenna is extremely carrying out data preparation conversion upwards, then same microwave output is assigned to multiple communication letters
Phase phase shift is carried out in road.
Present system performance is also better than existing system, and inter-carrier interference is smaller, is prevented effectively from by feedback control
The time delay of the larger technical problem of the expense and time delay of information, reduction overhead and reduction control information feedback, improves and is
The utilization rate of the descending power of system.
Brief description of the drawings
Fig. 1 is the inventive method schematic flow sheet.
Embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated：
A kind of multiple channel demodulation method based on multichannel communication reception system, comprises the following steps：
Emitter sends data and modulated by DBPSK；
Sampling Rate is promoted to by 819.2khz by Digital Up Convert；
It is modulated to 400hz carrier waves；
Multichannel down coversion receives data 1/2 and extracted, and Sampling Rate is reduced to 409.6khz；
Data to extraction are arranged；
Arrangement conversion is carried out to the data after extraction；
Phase compensation is carried out to arranging the data after conversion.
Further, the emitter sends the step of data are modulated by DBPSK and is specially：
Differential coding is obtained by differential encoder；
Level conversion is carried out, -1 is obtained ,+1 yard of information；
Carry out BPSK modulation and can obtain DBPSK modulated signals
Further, the data of described pair of extraction are specially the step of arrange：
The data of extraction are divided into every one group of 2048 data, then the traffic table of every group of data pick-up to association are obtained
Data；
If the data have existed and in more new state, have abandoned current business table, and enter next step；
During service data updating state, then original is extracted into data by new data cover, continue next step；
During service data updating state, proceed analysis to business datum, obtain is used to generate extraction number in traffic table
According to record；
Extracted according to data pick-up field contents, the data of metadata correspondence service fields are obtained, according to extraction
Data whether there is, and performs and updates operation；
Business datum state is judged, if business in the state of deletion, the then detailed table recorded data pick-up
The corresponding data record of table is deleted.
Further, described pair extract after data carry out arrange conversion the step of be specially：
Receive the data after extracting；
The extraction data of reception are copied as 2 parts, and are stored on two different addresses；
Carry out data storage；
Data to storage carry out FFT；
Export FFT result；
Final result output is carried out according to FFT output datas order；
When needing to complete at 1 point with 4 FFTs, 1 point data of input is copied as into 4 FFTs of progress after 4 points,
Then 1 FFT result is obtained to the data pick-up after conversion.
It is specially to the process for arranging the data progress phase compensation after conversion：
Data phase difference after arrangement conversion between different communication node is offset by adjusting microwave；
If antenna is extremely carrying out data preparation conversion upwards, then same microwave output is assigned to multiple communication letters
Phase phase shift is carried out in road.
Claims (5)
1. a kind of multiple channel demodulation method based on multichannel communication reception system, it is characterised in that comprise the following steps：
Emitter sends data and modulated by DBPSK；
Sampling Rate is promoted to by 819.2khz by Digital Up Convert；
It is modulated to 400hz carrier waves；
Multichannel down coversion receives data 1/2 and extracted, and Sampling Rate is reduced to 409.6khz；
Data to extraction are arranged；
Arrangement conversion is carried out to the data after extraction；
Phase compensation is carried out to arranging the data after conversion.
2. the multiple channel demodulation method according to claim 1 based on multichannel communication reception system, it is characterised in that institute
Stating the step of emitter transmission data are modulated by DBPSK is specially：
Differential coding is obtained by differential encoder；
Level conversion is carried out, -1 is obtained ,+1 yard of information；
Carry out BPSK modulation and can obtain DBPSK modulated signals.
3. the multiple channel demodulation method according to claim 2 based on multichannel communication reception system, it is characterised in that institute
Stating the step of being arranged to the data of extraction is specially：
The data of extraction are divided into every one group of 2048 data, the traffic table of every group of data pick-up to association is then obtained into number
According to；
If the data have existed and in more new state, have abandoned current business table, and enter next step；
During service data updating state, then original is extracted into data by new data cover, continue next step；
During service data updating state, proceed analysis to business datum, obtain to be used to generate in traffic table and extract data note
Record；
Extracted according to data pick-up field contents, the data of metadata correspondence service fields are obtained, according to the data of extraction
It whether there is, perform and update operation；
Business datum state is judged, if traffic table pair in the state of deletion, the then detailed table recorded data pick-up
The data record answered is deleted.
4. the multiple channel demodulation method according to claim 3 based on multichannel communication reception system, it is characterised in that institute
Stating the step of carrying out to the data after extraction and arrange conversion is specially：
Receive the data after extracting；
The extraction data of reception are copied as 2 parts, and are stored on two different addresses；
Carry out data storage；
Data to storage carry out FFT；
Export FFT result；
Final result output is carried out according to FFT output datas order；
When needing to complete at 1 point with 4 FFTs, 1 point data of input is copied as into 4 FFTs of progress after 4 points, then
1 FFT result is obtained to the data pick-up after conversion.
5. the multiple channel demodulation method according to claim 4 based on multichannel communication reception system, it is characterised in that right
Arrange conversion after data carry out phase compensation process be specially：
Data phase difference after arrangement conversion between different communication node is offset by adjusting microwave；
If antenna is extremely carrying out data preparation conversion upwards, then same microwave output is assigned in multiple communication channels
Carry out phase phase shift.
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| CN107070834B CN107070834B (en) | 2020-04-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018071A (en) * | 2006-02-08 | 2007-08-15 | 大唐移动通信设备有限公司 | Method for removing the peak power |
| CN101034944A (en) * | 2007-04-03 | 2007-09-12 | 深圳市嵘兴实业发展有限公司 | Multi-task and multi-user radio monitoring receiver and monitoring system |
| US7388932B1 (en) * | 2002-12-30 | 2008-06-17 | Broadlogic Network Technologies, Inc. | Fully parallel multi-channel demodulator |
| CN106209722A (en) * | 2016-06-15 | 2016-12-07 | 电子科技大学 | A kind of multi-path digital down conversion method for baseband signal receiver |
| CN106302302A (en) * | 2015-05-20 | 2017-01-04 | 北京理工大学 | The width phase on-line monitoring of a kind of multi channel signals transmitting terminal and real-time compensation method |
-
2017
- 2017-02-09 CN CN201710070634.8A patent/CN107070834B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7388932B1 (en) * | 2002-12-30 | 2008-06-17 | Broadlogic Network Technologies, Inc. | Fully parallel multi-channel demodulator |
| CN101018071A (en) * | 2006-02-08 | 2007-08-15 | 大唐移动通信设备有限公司 | Method for removing the peak power |
| CN101034944A (en) * | 2007-04-03 | 2007-09-12 | 深圳市嵘兴实业发展有限公司 | Multi-task and multi-user radio monitoring receiver and monitoring system |
| CN106302302A (en) * | 2015-05-20 | 2017-01-04 | 北京理工大学 | The width phase on-line monitoring of a kind of multi channel signals transmitting terminal and real-time compensation method |
| CN106209722A (en) * | 2016-06-15 | 2016-12-07 | 电子科技大学 | A kind of multi-path digital down conversion method for baseband signal receiver |
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Effective date of registration: 20200318 Address after: No. 368, Keyun Road, hi tech Zone, Chengdu, Sichuan 610000 Applicant after: Chengdu Mifeng perception Technology Co., Ltd Address before: 430223 Hubei city of Wuhan province East Lake high tech Development Zone Wuhan University Science Park Road No. 2 Applicant before: WUHAN MIFENG COMMUNICATION TECHNOLOGY Co.,Ltd. |
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