CN107204798A - A kind of amplification relay forwarding optimization system and its optimization method based on USRP - Google Patents
A kind of amplification relay forwarding optimization system and its optimization method based on USRP Download PDFInfo
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- CN107204798A CN107204798A CN201710333973.0A CN201710333973A CN107204798A CN 107204798 A CN107204798 A CN 107204798A CN 201710333973 A CN201710333973 A CN 201710333973A CN 107204798 A CN107204798 A CN 107204798A
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- Prior art keywords
- relay
- signal
- usrp
- amplification
- receiving terminal
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15592—Adapting at the relay station communication parameters for supporting cooperative relaying, i.e. transmission of the same data via direct - and relayed path
Abstract
The invention discloses a kind of amplification relay forwarding optimization system based on USRP and its optimization method, comprising transmitting terminal and receiving terminal, increase by a relay in the transmitting terminal and receiving terminal；By increasing a relay, data can be first sent to relay by information source end, in relay, we are mainly amplified processing using amplifier to the signal received, improve the repeating power of data, then stay of two nights end is relayed to, influence of the unfavorable property of wireless medium to data transfer can be reduced by this technology, the reliability of data transfer is improved.
Description
Technical field
Turn the invention belongs to software radio technical field of information transmission, more particularly to a kind of amplification relaying based on USRP
Send out optimization system and its optimization method.
Background technology
In in the past few decades, with being continuously increased for handheld mobile device quantity, people are to reliable high-speed data
Stable inclination is also presented in the demand of communication, but in order to meet the demand that these are growing, we are certain to face many
Challenge, during data transfer, due to decline, shade, multipath effect, bandwidth constraint and across the channel disturbance the problems such as
In the presence of the unfavorable property of wireless medium just turns into the ultimate challenge that we face.In these problems, there is many to use
Multiple antennas are solved, so as to realize space diversity and gain multiplexing.Although be in the multiple antennas of base station deployment it is feasible,
Due to wanting the size of strict requirements antenna and the control to cost, so doing on the mobile apparatus may be impracticable.Cooperation
Communication is an attractive alternative solution, and plurality of node coordination with one another is to provide the phase promised to undertake by multiaerial system
Same diversity and spatial multiplexing gain.
The simplest form of cooperative communication network is three node junction networks, is by information source, the stay of two nights and ad-hoc relay composition.
Collaboration communication is divided into two major classes：Decoding forwarding（DF）With amplification forwarding (AF).In decoding forwarding（DF）In agreement, relaying
Device is decoded the source signal received from information source end, and the signal after decoding is forwarded into destination.In amplification forwarding
（AF）In agreement, the signal received from information source end is amplified by relay, and the signal after amplification is forwarded into purpose
Ground.
The content of the invention
The technical problems to be solved by the invention are the deficiencies for background technology there is provided a kind of amplification based on USRP
Relay forwarding optimizes system and its optimization method, and it uses single relaying amplification forwarding scheme, optimizes the mode of data transfer, from
And the interference that the unfavorable property for reducing wireless medium is produced to data transfer, it is effectively improved the reliability of data transfer.
The present invention uses following technical scheme to solve above-mentioned technical problem
A kind of amplification relay forwarding optimization system based on USRP, comprising transmitting terminal and receiving terminal, in the transmitting terminal and reception
Increase by a relay between end；
Wherein, transmitting terminal, is transmitted to relay for signal to be sent；
Relay, is amplified for the signal to reception and handles and then be forwarded to receiving terminal；
Receiving terminal, the signal for receiving relay forwarding.
Optimize the further preferred scheme of system as a kind of amplification relay forwarding based on USRP of the present invention, relay leads to
The transmission antenna for crossing USRP N200 is communicated with receiving terminal.
A kind of amplification relay forwarding based on USRP optimizes the optimization method of system, specifically comprises the following steps：
Step 1, in transmitting terminal, the path for treating fat file is set, reading treats fat file and converts thereof into data bit flow；To reading
The file got carries out coded modulation, converts a signal into data signal and then transmits to relay；
Step 2, relay is amplified processing to the signal received, and the signal after amplification is transmitted into receiving terminal；
Step 3, receiving terminal carries out decoding demodulation operation to the signal of reception.
It is used as a kind of further preferred side of the optimization method of the amplification relay forwarding optimization system based on USRP of the present invention
Case, in step 1, coded modulation has been carried out using GMSK modulation mode to the file read.
It is used as a kind of further preferred side of the optimization method of the amplification relay forwarding optimization system based on USRP of the present invention
Case, in step 2, relay are amplified processing using amplifier to the signal received.
The present invention uses above technical scheme compared with prior art, with following technique effect：
1st, the present invention optimizes the mode of data transfer, so as to reduce wireless medium not using single relaying amplification forwarding scheme
The interference that sharp property is produced to data transfer, is effectively improved the reliability of data transfer；
2nd, compared with traditional mode that direct transfers, relay forwarding technology can be according to specific demand avoiding obstacles as far as possible
Stop, reduce packet loss, improve systematic function；In addition, relay forwarding technology also expands communication distance, make communication overlay model
Enclose wider；
3rd, when we are communicated under good channel circumstance, amplification forwarding is for decoding forwarding, amplification forwarding
Advantage be that its system architecture is relatively easy, it is easy to operation realize, our cost thus greatly reduces, and
Preferable laser propagation effect can be reached.
Brief description of the drawings
Fig. 1 is single relaying amplification forward collaboration Principle of Communication；
Fig. 2 is single relaying amplification forwarding flow chart.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of amplification relay forwarding optimization system based on USRP, comprising transmitting terminal and receiving terminal, in the hair
Increase by a relay between sending end and receiving terminal；
Wherein, transmitting terminal, is transmitted to relay for signal to be sent；
Relay, is amplified for the signal to reception and handles and then be forwarded to receiving terminal；
Receiving terminal, the signal for receiving relay forwarding.
A kind of amplification relay forwarding based on USRP optimizes the optimization method of system, as shown in Fig. 2 specific include following step
Suddenly：
Step 1, in transmitting terminal, the path for treating fat file is set, reading treats fat file and converts thereof into data bit flow；To reading
The file got carries out coded modulation, converts a signal into data signal and then transmits to relay；
Step 2, relay is amplified processing to the signal received, and the signal after amplification is transmitted into receiving terminal；
Step 3, receiving terminal carries out decoding demodulation operation to the signal of reception
Under software radio thought, traditional communication system is led on general software radio peripheral hardware platform USRP N200
Cross software programming to realize, the reliability of data transfer is improved by the way of single relay forwarding.It is to be sent due to what is read
Signal may not be well adapted for the transmission of channel, can be according to different transmission situations, by calling GNU Radio
Modulation /demodulation module select suitable modulation-demo-demodulation method, in the present invention, we use GMSK modulation mode, make to treat
The signal of transmission preferably adaptive channel can be transmitted.In relay, we are received after the signal sent from information source end,
Operation is amplified to signal by amplifier, and the signal after amplification is transmitted to stay of two nights end, is carried out at stay of two nights end corresponding
Decoding demodulation etc. adjust operation after obtain original signal.
The technical solution of the present invention：
The present invention be under the thought of software radio, by GNU Radio and USRP N200 erect come software and hardware
The system platform being combined, data are received by USRP N200 hardware platforms, then will be received by gigabit Ethernet mouthful
Data are sent to PC ends, and GNU Radio software platforms are carried out a series of by the way of software programming to data on PC ends
It is transmitted again after processing.The present invention is mainly carried out the signal sent from information source end using amplifier in relay to it
Amplifieroperation, is then forwarded again, so as to reduce interference of the unfavorable property of wireless medium to data transfer, reaches raising number
According to the purpose of the reliability of transmission.
1. data transfer operation：
In this prioritization scheme, the method for closing software programming by the signal processing module inclusion of GNU Radio software platforms is taken
Build up single relaying amplification forwarding system flow chart.The modules block diagram of communication system we can be straight in class libraries according to demand
Connect and call, there is no integrated good us to use C++ programming languages in class libraries and be programmed completion, and between modules
Us are bonded to use Python programming languages to complete.
In transmitting terminal, the path for treating fat file is set, program may be read into according to the address of setting treat fat file and by its
Data bit flow is converted into, in order that the file read preferably can be transmitted in the channel, we are to reading
File has carried out the processing operation such as coded modulation, converts a signal into data signal and is transmitted.In addition set and believe in transmitting terminal
Number transmission destination for relaying address, the signal of transmitting terminal is sent to relay.Use amplifier in relay, to from
The signal that transmitting terminal is received is amplified processing, and the signal after amplification is transmitted into receiving terminal.
In order to reduce the loss of packet, before the data of transmitting terminal are sent, first start relay and connect
The program of receiving end, restarts the program of transmitting terminal, and the loss of packet can farthest be reduced by so doing, and be reached more
Good reception.
2. transmission is realized
In data transmission procedure, the reception of signal and transmission operation, A/D and D/A conversion operations are completed on USRP N200
, the operation such as other encoding and decoding carried out to signal realizes that concrete operations are exactly logical on GNU Radio software platforms
The reception antenna RX for crossing USRP N200 to signal receive and then the analog signal received progress analog-to-digital conversion is become into several
Word signal, then be sent to by gigabit Ethernet oral instructions on the GNU Radio software platforms at PC ends and carry out a series of processing, for example
The operation such as coded modulation is mainly carried out to signal in information source end, relay is mainly amplified to signal, then passes through USRP N200
Transmission antenna TX send, received in stay of two nights termination and main after signal the operations such as decoding demodulation carried out to signal.
Inventive point is summarized
1. during data transfer, due to decline, shade, multipath effect, bandwidth constraint and the problems such as channel disturbance
In the presence of the unfavorable property of wireless medium just turns into the ultimate challenge that we face, and data are passed in order to reduce these unfavorable factors
Defeated interference, improves reliability, and single this solution of relaying amplification forwarding is employed in data transmission procedure, is passed in data
The interference of the extraneous factors such as barrier can be avoided as far as possible using relay forwarding technology during defeated, while being adopted in relay
The power of data transfer can be improved with amplification forwarding technology, the possibility of data transfer is further ensured.
2. in data transmission procedure, in order to further improve the reliability of data transfer, in transmitting terminal to reading
Data to be sent carried out coded modulation etc. processing operation, accordingly receiving terminal done decoding demodulation operation, so enter
One step ensure that the reliability of data transfer.
Claims (5)
1. a kind of amplification relay forwarding optimization system based on USRP, includes transmitting terminal and receiving terminal, it is characterised in that：Described
Increase by a relay between transmitting terminal and receiving terminal；
Wherein, transmitting terminal, is transmitted to relay for signal to be sent；
Relay, is amplified for the signal to reception and handles and then be forwarded to receiving terminal；
Receiving terminal, the signal for receiving relay forwarding.
2. a kind of amplification relay forwarding optimization system based on USRP according to claim 1, it is characterised in that：Relay
Communicated by USRP N200 transmission antenna with receiving terminal.
3. a kind of amplification relay forwarding based on USRP described in claim 1 or 2 optimizes the optimization method of system, its feature exists
In：Specifically comprise the following steps：
Step 1, in transmitting terminal, the path for treating fat file is set, reading treats fat file and converts thereof into data bit flow；To reading
The file got carries out coded modulation, converts a signal into data signal and then transmits to relay；
Step 2, relay is amplified processing to the signal received, and the signal after amplification is transmitted into receiving terminal；
Step 3, receiving terminal carries out decoding demodulation operation to the signal of reception.
4. a kind of amplification relay forwarding based on USRP according to claim 3 optimizes the optimization method of system, its feature
It is：In step 1, coded modulation has been carried out to the file read using GMSK modulation mode.
5. a kind of amplification relay forwarding based on USRP according to claim 3 optimizes the optimization method of system, its feature
It is：In step 2, relay is amplified processing using amplifier to the signal received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710333973.0A CN107204798A (en) | 2017-05-12 | 2017-05-12 | A kind of amplification relay forwarding optimization system and its optimization method based on USRP |
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| CN201710333973.0A CN107204798A (en) | 2017-05-12 | 2017-05-12 | A kind of amplification relay forwarding optimization system and its optimization method based on USRP |
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| CN201710333973.0A Pending CN107204798A (en) | 2017-05-12 | 2017-05-12 | A kind of amplification relay forwarding optimization system and its optimization method based on USRP |
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Cited By (2)
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| CN110365447A (en) * | 2019-05-30 | 2019-10-22 | 西安交通大学 | A kind of encryption safe transmission method of eating dishes without rice or wine based on NI USRP-RIO |
| CN113825203A (en) * | 2021-09-22 | 2021-12-21 | 湖南智领通信科技有限公司 | Multipath signal transmission method and device based on time synchronization |
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| US20100195751A1 (en) * | 2009-02-05 | 2010-08-05 | Orlik Philip V | Method for Estimating Channels in Two-Hop MIMO AF Networks |
| CN102892142A (en) * | 2012-08-31 | 2013-01-23 | 宋清洋 | Relay transmission system and method capable of adaptively selecting relay schemes |
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| CN104601215A (en) * | 2008-01-02 | 2015-05-06 | 交互数字技术公司 | Relay node, network node and method for use in relay node |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110365447A (en) * | 2019-05-30 | 2019-10-22 | 西安交通大学 | A kind of encryption safe transmission method of eating dishes without rice or wine based on NI USRP-RIO |
| CN113825203A (en) * | 2021-09-22 | 2021-12-21 | 湖南智领通信科技有限公司 | Multipath signal transmission method and device based on time synchronization |
| CN113825203B (en) * | 2021-09-22 | 2023-07-04 | 湖南智领通信科技有限公司 | Multipath signal transmission method and device based on time synchronization |
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Application publication date: 20170926 |