CN107786240A - The digital communication transceiver apparatus of multiple carrier frequency saltus step - Google Patents
The digital communication transceiver apparatus of multiple carrier frequency saltus step Download PDFInfo
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- CN107786240A CN107786240A CN201710947169.1A CN201710947169A CN107786240A CN 107786240 A CN107786240 A CN 107786240A CN 201710947169 A CN201710947169 A CN 201710947169A CN 107786240 A CN107786240 A CN 107786240A
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- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- 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
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
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- 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
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
- H04B2001/71362—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform using a bank of frequency sources
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Abstract
The invention discloses a kind of digital communication transceiver apparatus of multiple carrier frequency saltus step, includes the random indicating member of communication carrier, baseband processing unit, transmitting-receiving converter unit, communication carrier search unit and duplexer.The present invention is during station telecommunication, the state that configured information makes communication carrier frequency be in saltus step is changed by the random indicating member of communication carrier at random, and the communication channel for carrying voice-and-data is similarly in random jump state in communication bandwidth, and camouflage is carried out to it by pseudo noise channel to hide, multiple carrier frequency random jump mode not only increases the antijamming capability of communication, and avoid the defects of poor anti jamming capability is with being easily trapped in complex electromagnetic environment in existing analogue communication radio station and digital communication station, and solve the problems, such as to need to solve during actual frequency hopping communications, suitable for the number biography under a variety of Secret anti-interference scenes such as civilian private network communication and military communication and voice communication.
Description
Technical field
The present invention relates to radio communication or communication countermeasure technical field, specifically a kind of numeral of multiple carrier frequency saltus step
Communication station device.
Background technology
No matter communication station has quite varied application in civilian or military domain, is a kind of indispensable communication
Instrument.Traditional communication station due to it is single determine the reasons such as frequency carrier wave and modulation system cause its exist antijamming capability compared with
Many defects such as difference, communication are easily interrupted and communication is easily trapped, under some urgent important events or military scene,
These shortcomings are flagrant.
It is a kind of most common communication station form (as shown in Figure 1) to determine frequency analogue communication radio station, and many private network radio station are all
Point-to-point communication is realized in this way, and communication every time can be selected a channel and typically be adopted as communication carrier frequency, modulation system
Use narrow-band FM.This species radio station implementation is simple, and not high for QoS requirement, Content of Communication is not under the scene of concerning security matters
It is very useful.But its poor anti jamming capability, under the electromagnetic environment of complexity, it is logical when particularly targetedly disturbing
Letter is almost interrupted.
The defects of in order to avoid above-mentioned analogue communication radio station, its antijamming capability is improved, there is patent to propose with the frequency that communicates
The communication station that rate saltus step and digital modulation are combined, such as the Chinese patent application that number of patent application is 201110324875.3
File discloses a kind of data transmission rapid frequency hopping radio station, and its frequency-hopping communication system theory diagram is as shown in Fig. 2 whole system can
It is divided into three parts：Digital Signal Processing, frequency hopping local oscillator source and radio frequency frequency conversion channel.Signal process part is in transmitting to defeated
Enter information source and carry out FSK modulation and digital-to-analogue conversion, then analog signal carries out analog-to-digital conversion and FSK demodulation obtains to receiving when 330 receiving
Obtain the stay of two nights.Realize that Direct Digital Frequency Synthesizers pass through control line using Direct Digital Frequency Synthesizers (DDS) in frequency hopping local oscillator source
It is connected with FPGA circuitry, FPGA can control Direct Digital Frequency Synthesizers to export to Direct Digital Frequency Synthesizers write-in data
Corresponding frequencies, if radio station needs to be arranged to frequency hopping communications state, FPGA according to a class frequency collection (i.e. frequency hopping pattern) successively
Change the value for being sent into Direct Digital Frequency Synthesizers, the frequency of now Direct Digital Frequency Synthesizers output will be jumped rapidly
Become.Radio frequency frequency conversion channel is then to go to realize in the form of traditional mixing, filtering and amplification.
In patent recited above, it is referred to when frequency hopping radio set is in fast frequency-hopped reception state, receives radio station
The frequency values of FPGA circuitry module write-in Direct Digital Frequency Synthesizers and transmitting station FPGA circuitry module write-in Direct Digital
Radio station is received and dispatched in strange land when keeping identical when the frequency values of frequency synthesizer module are fast-changing, but not referring to radio communication
How frequency-hopping synchronization is realized, because being precisely synchronously only the major issue that frequency hopping radio set needs to solve；Allow to realize synchronously,
Still the possibility being trapped be present in the frequency hopping pattern of finite length.In addition, the frequency hopping scope entirely to communicate is up to
20MHz, it is difficult to resist powerful signal jam and signal compacting.
The content of the invention
It is an object of the invention to provide a kind of digital communication transceiver apparatus of multiple carrier frequency saltus step, to avoid existing mould
Intend the defects of poor anti jamming capability is with being easily trapped in complex electromagnetic environment in communication station and digital communication station, and solve
Need to solve the problems, such as during certainly actual frequency hopping communications.
Technical scheme is as follows：
A kind of digital communication transceiver apparatus of multiple carrier frequency saltus step, it is characterised in that：It is random to include communication carrier
Indicating member, baseband processing unit, transmitting-receiving converter unit, communication carrier search unit and duplexer；
The random indicating member of communication carrier is burst type frequency generating apparatus, and it is logical that to be transmitting station provide for receiving terminal
Believe the important configured information of carrier frequency value, its caused carrier indication information randomly generates in the frequency range of restriction, often
The carrier frequency value that one carrier indication information is both corresponded in communications band；
Described baseband processing unit includes channel bank and IQ modem modules, described Channel Processing list
Member produces synchronizing channel, location index channel, voice communication channel and pseudo noise channel when radio station is launched, wherein, synchronous letter
Road provides the Time and Frequency Synchronization and compensation condition of subframe/symbol for whole communication link；Location index channel is passed by sequence modulation
Pass the random jump positional information of receiver end voice communication channel；Voice communication channel carries the transmission letter of data and voice
Breath；Pseudo noise channel is to carry out noise modulated filling to untapped running time-frequency resource, utilizes caused pseudo-random sequence and voice
Channel identical modulation system is modulated mapping, and it is hidden and pseudo- that communication speech channel is submerged in into progress inside noisy communication channel
Dress；When being received in radio station, the Time and Frequency Synchronization that receiving side carries out subframe/symbol to base band data detects and completes to compensate, synchronous to mend
Data after repaying need to parse location index channel and obtain voice communication channel position, during communication, language
The position of sound communication channel at interval of wireless frame length (10ms) random jump once, it is necessary to pass through location index channel solution
Analysis obtains, and after completing to carry out channel parsing to voice channel, obtains the final communication information；Described IQ modem modules
For the modulation and demodulation of digital baseband data, when in emission state, then the base band data by channel generation carries out positive intermodulation
Make and move the signal after modulation to IF carrier；When in reception state, then the intermediate-freuqncy signal of reception is adopted
Collection and DDC conversion, provided by extracting and IQ base band datas being obtained after formed filter to channel parsing module；
Described baseband processing unit includes dsp chip, FPGA programmable logic chips and DDS chips；
Described transmitting-receiving converter unit includes local oscillator, frequency mixer, filter unit and power amplifier, when in
During emission state, the intercarrier signal after modulation is inputted to frequency mixer, and carrying out mixing with local oscillator in frequency mixer will
Modulated intermediate frequency signal is moved to the radio frequency carrier frequency of setting, and carrier signal is exported after unit, power amplifier after filtering again
To antenna port；When in reception state, the signal of antenna port input enters by LNA in frequency mixer with local oscillator
Row mixing moves carrier signal to intermediate frequency, and the processing such as intermediate-freuqncy signal is amplified after filtering transmit a signal to ADC collections port；
Described communication carrier search unit, by frequency conversion, is filtered, put to receive radio station to launching the search of communication carrier
Big and high speed acquisition, real-time frequency catch, frequency configured information caught, basis after the frequency configured information after seizure
Corresponding calculating method obtains communication carrier frequency values；
Described duplexer is transceiver channel switch unit, using semiduplex mode, i.e., when in emission state, is received
Passage is closed；When in reception state, transmission channel is closed.
The digital communication transceiver apparatus of described multiple carrier frequency saltus step, it is characterised in that：During communication, hair
The modulated carrier frequencies for penetrating end carry out random jump (such as 500MHz) in certain frequency range, and receiving terminal utilizes transmitting terminal
Carrier indication information real-time synchronization tracking is carried out to communication carrier frequency, and convert to obtain according to the carrier indication information of acquisition
Communication carrier frequency, so as to carry out down coversion and IQ demodulation to signal under the frequency.
The digital communication transceiver apparatus of described multiple carrier frequency saltus step, it is characterised in that：Transmitting terminal voice communication
At interval of a wireless frame length random jump once, the scope of saltus step is communication bandwidth scope (such as 20MHz) to channel position；
The voice that receiving terminal is accurately positioned to voice channel position using synchronizing channel and location index channel and carried to channel
Information carries out unremitting clear parsing.
In the present invention, the random indicating member of communication carrier can all randomly choose a carrier wave before each communication and generate
Carrier information is launched, and receiving terminal now carries out carrier wave instruction search (such as in the range of 40MHz) in the frequency range that tactics are arranged.
The frequency range of the random indicating member search of communication carrier and actual communications band a good distance off, and carried out in a manner of burst
Transmitting, it is therefore an objective to prevent identified instruction search frequency range, interference or intercept and capture.The communication carrier search unit of receiving terminal is being done always
Search in real time, as long as having Burst frequency to produce can just identify and obtain communication carrier frequency values according to corresponding algorithm rule.It is logical
The communication carrier frequency values searched are reported to complete machine control unit by letter searching carrier unit, and control unit issues frequency values
To communications reception unit, communications reception unit will carry out the processing such as down coversion, filtering and amplification, warp on the frequency values to signal
IQ demodulation process is done after crossing high-speed ADC collection, and forms base band data and sends to baseband processing unit and do channel parsing.
In the present invention, tens megahertzs of communication bandwidth is divided into about 200 channels on frequency domain, voice communication is due to information
Amount is smaller temporarily to take a channel.It is 10ms that a wireless frame length will be defined in time domain, and each radio frames changes at random
The position of voice channel, voice channel position can be kept to be in dynamic random variable condition.Due to inside radio frames
There is location index channel, it is only necessary to which location index channel, which is parsed, in receiving terminal can just obtain voice communication channel position.
In the present invention, the frequency of communication carrier is random jump in communication process, carries the communication letter of voice messaging
The position in road is equally random jump, it is achieved thereby that the communication mode of multiple carrier frequency saltus step, the communication mode
There is stronger antijamming capability in complex electromagnetic environment, the random jump mode of indefinite length effectively reduces what is be trapped
Probability.In addition, frequency hopping is quick and precisely synchronous during the present invention solves the problems, such as actual frequency hopping communications.
Beneficial effects of the present invention：
For the present invention during station telecommunication, changing configured information at random by the random indicating member of communication carrier makes communication
Carrier frequency is in the state of saltus step, and the communication channel for carrying voice-and-data is similarly in random jump in communication bandwidth
State, and camouflage is carried out to it by pseudo noise channel and is hidden, multiple carrier frequency random jump mode not only increases communication
Antijamming capability, and avoid anti-interference in complex electromagnetic environment in existing analogue communication radio station and digital communication station
Ability and easy the defects of being trapped, and solve the problems, such as to need to solve during actual frequency hopping communications, suitable for civilian
Number under a variety of Secret anti-interference scenes such as private network communication and military communication passes and voice communication.
Brief description of the drawings
Fig. 1 is traditional structural principle block diagram for determining frequency analogue communication radio station.
Fig. 2 is the structural principle block diagram of data transmission rapid frequency hopping radio station.
Fig. 3 is the structural principle block diagram of structure of the present invention.
Embodiment
Referring to Fig. 3, a kind of digital communication transceiver apparatus of multiple carrier frequency saltus step, include communication carrier and indicate at random
Unit 2, baseband processing unit 1, transmitting-receiving converter unit, communication carrier search unit 4 and duplexer 8；
The random indicating member 2 of communication carrier is burst type frequency generating apparatus, is that transmitting station provides communication for receiving terminal
The important configured information of carrier frequency value, its caused carrier indication information randomly generates in the frequency range of restriction, each
The carrier frequency value that individual carrier indication information is both corresponded in communications band；
Baseband processing unit 1 includes channel bank and IQ modem modules, and channel bank is sent out in radio station
Synchronizing channel, location index channel, voice communication channel and pseudo noise channel are produced when penetrating, wherein, synchronizing channel is whole logical
Believe that link provides the Time and Frequency Synchronization and compensation condition of subframe/symbol；Location index channel passes to receiver by sequence modulation
Hold the random jump positional information of voice communication channel；Voice communication channel carries data and the transmission information of voice；Pseudo noise
Channel is to carry out noise modulated filling to untapped running time-frequency resource, utilizes caused pseudo-random sequence and voice channel identical
Modulation system is modulated mapping, and communication speech channel is submerged in inside noisy communication channel and carries out hidden and camouflage；Connect in radio station
Time receiving, the Time and Frequency Synchronization that receiving side carries out subframe/symbol to base band data detect and complete to compensate, and the data after synchroballistic need
Location index channel is parsed and obtain voice communication channel position, during communication, voice communication channel
Position at interval of wireless frame length (10ms) random jump once, it is necessary to by location index channel parse obtain, complete
After paired voice channel carries out channel parsing, the final communication information is obtained；IQ modem modules are digital baseband data
Modulation and demodulation, when in emission state, then the base band data of channel generation is subjected to orthogonal modulation and by the letter after modulation
Number move to IF carrier；When in reception state, then the intermediate-freuqncy signal of reception is acquired and converted with DDC, passed through
Extract and provided with acquisition IQ base band datas after formed filter to channel parsing module；
Baseband processing unit 1 includes dsp chip, FPGA programmable logic chips and DDS chips；
Transmitting-receiving converter unit includes local oscillator 3, frequency mixer 5, filter unit 6 and power amplifier 7, when in hair
When penetrating state, the intercarrier signal after modulation is inputted to frequency mixer 5, and carrying out mixing with local oscillator 3 in frequency mixer 5 will
Modulated intermediate frequency signal is moved to the radio frequency carrier frequency of setting, and carrier signal is defeated after unit 6, power amplifier 7 after filtering again
Go out to antenna port；When in reception state, antenna port input signal by LNA in frequency mixer 5 with local oscillations
Device 3, which is mixed, moves carrier signal to intermediate frequency, intermediate-freuqncy signal transmitted after crossing filter unit 6, power amplifier 7 to
ADC gathers port；
Communication carrier search unit 4 for receive radio station to launch communication carrier search, by frequency conversion, filtering, amplification with
And high speed acquisition, real-time frequency catch, frequency configured information caught, according to corresponding after the frequency configured information after seizure
Calculating method obtain communication carrier frequency values；
Duplexer 8 is transceiver channel switch unit, uses semiduplex mode, i.e., when in emission state, receiving channel
Close；When in reception state, transmission channel is closed.
In the present embodiment, (such as 40MHz) generation about 1600 in a certain band limits of the random indicating member 2 of communication carrier
Individual carrier wave indicates index information, and each carrier wave instruction index information corresponds to a communication carrier frequency, communication carrier frequency with
Certain specific relational expression between carrier indication information be present, illustrate：
ftr_channel=fstart+Ctr_index*fchan_step
Wherein, fstartTo set the initial frequency of communications band, Ctr_indexIndexed for transmitting carrier indication information,
fchan_stepFor the channel grid of communication frequency.
As various deformation, above communication carrier frequency and carrier indication information have a variety of corresponding relations, linear
Also have nonlinear, finally can directly or indirectly obtain communication carrier frequency values.The indication signal of transmitting terminal is burst
The signal of formula, burst duration can be set in system interface.The searching carrier inside modules of receiving terminal have passed through frequency conversion, filter
Ripple and power amplification and high speed acquisition, the carrier wave of restriction is indicated by high speed acquisition to do frequency search in band limits,
Differential comparison is done while high-speed search with background noise spectrum, prominent indication signal, acquisition is judged to indication signal, and
Obtain launching communication carrier frequency size by indication signal, then issue carrier frequency value to receiver module.
In the present embodiment, not only communication carrier frequency does frequency hopping, and the communication channel for carrying speech data is equally also located
In transitional states.The modulation system of device employs traditional OFDM mode, in resource impact, basis of the present invention
Demand devises synchronizing channel, location index channel, voice communication channel and pseudo noise channel on frequency domain, with a resource block
Calculated for channel width, can be divided into about 200 channels on whole frequency domain, devised in time domain with radio frames, subframe and
The chronomeres such as symbol.At interval of wireless frame length (10ms) random jump once, puppet is made an uproar for the position of voice communication channel
Acoustic channel employs fills with voice communication channel identical modulation system to untapped channel.The saltus step and camouflage of channel
So that voice communication channel is difficult to tracked and intercepted and captured, even if the short time is trapped, the multilayer scrambling of whole channel and spread spectrum make
It must be difficult to decode final data or voice messaging.Receiving terminal is believed by the parsing to location index channel to obtain voice communication
The position of breath.
Deform as one kind, in order to improve the randomness of channel, the saltus step interval of voice channel can be improved to half
Radio frames or a subframe.
In the present embodiment, baseband processing unit can synchronize detection in synchronized situation in units of radio frames,
Once detection lock-out is uploaded to main control end immediately, main control end is set to initiate carrier wave instruction search；While lock-out is reported, base
Tape handling unit can do synchronous computing again, untill time-frequency Complete Synchronization.
Above specific embodiment is to illustrate the invention and not to limit the present invention, general technology in the art
People makees any creation without creativeness according to above-mentioned design philosophy, is regarded as within the protection domain of this patent.
Claims (3)
- A kind of 1. digital communication transceiver apparatus of multiple carrier frequency saltus step, it is characterised in that：Include communication carrier at random to refer to Show unit, baseband processing unit, transmitting-receiving converter unit, communication carrier search unit and duplexer；The random indicating member of communication carrier is burst type frequency generating apparatus, is that transmitting station provides communication load for receiving terminal The important configured information of wave frequency rate value, its caused carrier indication information randomly generate in the frequency range of restriction, each The carrier frequency value that carrier indication information is both corresponded in communications band；Described baseband processing unit includes channel bank and IQ modem modules, and described channel bank exists Synchronizing channel, location index channel, voice communication channel and pseudo noise channel are produced when radio station is launched, wherein, synchronizing channel is Whole communication link provides the Time and Frequency Synchronization and compensation condition of subframe/symbol；Location index channel is passed to by sequence modulation The random jump positional information of receiver end voice communication channel；Voice communication channel carries data and the transmission information of voice； Pseudo noise channel is to carry out noise modulated filling to untapped running time-frequency resource, utilizes caused pseudo-random sequence and voice channel Identical modulation system is modulated mapping, and communication speech channel is submerged in inside noisy communication channel and carries out hidden and camouflage； When radio station receives, the Time and Frequency Synchronization that receiving side carries out subframe/symbol to base band data detects and completes to compensate, after synchroballistic Data need to parse location index channel and obtain voice communication channel position, during communication, voice communication The position of channel at interval of a wireless frame length random jump once, it is necessary to by location index channel parse obtain, complete After paired voice channel carries out channel parsing, the final communication information is obtained；Described IQ modem modules are digital baseband The modulation and demodulation of data, when in emission state, then the base band data of channel generation is subjected to orthogonal modulation and will modulated Signal afterwards is moved to IF carrier；When in reception state, then the intermediate-freuqncy signal of reception is acquired and become with DDC Change, provided by extracting and IQ base band datas being obtained after formed filter to channel parsing module；Described baseband processing unit includes dsp chip, FPGA programmable logic chips and DDS chips；Described transmitting-receiving converter unit includes local oscillator, frequency mixer, filter unit and power amplifier, when in transmitting During state, the intercarrier signal after modulation is inputted to frequency mixer, is mixed in frequency mixer with local oscillator by intermediate frequency Modulated signal is moved to the radio frequency carrier frequency of setting, carrier signal again after filtering after unit, power amplifier output to day Line end mouth；When in reception state, the signal of antenna port input is mixed by LNA in frequency mixer with local oscillator Frequency moves carrier signal to intermediate frequency, and the processing such as intermediate-freuqncy signal is amplified after filtering transmit a signal to ADC collections port；Described communication carrier search unit for receive radio station to launch communication carrier search, by frequency conversion, filtering, amplification with And high speed acquisition, real-time frequency catch, frequency configured information caught, according to corresponding after the frequency configured information after seizure Calculating method obtain communication carrier frequency values；Described duplexer is transceiver channel switch unit, uses semiduplex mode, i.e., when in emission state, receiving channel Close；When in reception state, transmission channel is closed.
- 2. the digital communication transceiver apparatus of multiple carrier frequency saltus step according to claim 1, it is characterised in that：Communicating During, the modulated carrier frequencies of transmitting terminal carry out random jump in certain frequency range, and receiving terminal utilizes transmitting terminal Carrier indication information real-time synchronization tracking is carried out to communication carrier frequency, and convert to obtain according to the carrier indication information of acquisition Communication carrier frequency, so as to carry out down coversion and IQ demodulation to signal under the frequency.
- 3. the digital communication transceiver apparatus of multiple carrier frequency saltus step according to claim 1, it is characterised in that：Transmitting terminal At interval of a wireless frame length random jump once, the scope of saltus step is communication bandwidth scope to the channel position of voice communication； The voice that receiving terminal is accurately positioned to voice channel position using synchronizing channel and location index channel and carried to channel Information carries out unremitting clear parsing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108429712A (en) * | 2018-03-12 | 2018-08-21 | 中国人民解放军国防科技大学 | OFDM-based wireless communication time-frequency synchronization method |
| CN108900221A (en) * | 2018-06-19 | 2018-11-27 | 哈尔滨工程大学 | A kind of index modulation Frequency-hopping Communication Technology based on IFFT/FFT frame |
| CN110401468A (en) * | 2019-08-07 | 2019-11-01 | 哈尔滨工业大学 | Context-aware convert communication system and context-aware concealed communication method |
| CN111711477A (en) * | 2020-04-26 | 2020-09-25 | 四川润泽经伟信息技术有限公司 | Carrier interference system, method and device based on satellite communication countermeasure system |
| CN111835382A (en) * | 2019-04-16 | 2020-10-27 | 北京正唐科技有限责任公司 | Frequency hopping radio station based on Si446x integrated radio frequency chip and R5F562N8 singlechip |
| CN113114407A (en) * | 2021-04-06 | 2021-07-13 | 电子科技大学 | Secret communication method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108429712A (en) * | 2018-03-12 | 2018-08-21 | 中国人民解放军国防科技大学 | OFDM-based wireless communication time-frequency synchronization method |
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| CN111835382A (en) * | 2019-04-16 | 2020-10-27 | 北京正唐科技有限责任公司 | Frequency hopping radio station based on Si446x integrated radio frequency chip and R5F562N8 singlechip |
| CN111835382B (en) * | 2019-04-16 | 2022-01-14 | 北京正唐科技有限责任公司 | Frequency hopping radio station based on Si446x integrated radio frequency chip and R5F562N8 singlechip |
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| CN111711477A (en) * | 2020-04-26 | 2020-09-25 | 四川润泽经伟信息技术有限公司 | Carrier interference system, method and device based on satellite communication countermeasure system |
| CN111711477B (en) * | 2020-04-26 | 2022-05-10 | 四川润泽经伟信息技术有限公司 | Carrier interference system, method and device based on satellite communication countermeasure system |
| CN113114407A (en) * | 2021-04-06 | 2021-07-13 | 电子科技大学 | Secret communication method and system |
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Denomination of invention: A Digital Communication Radio Device with Multiple Carrier Frequency Jumps Effective date of registration: 20230613 Granted publication date: 20191015 Pledgee: Anhui pilot Free Trade Zone Hefei area sub branch of Huishang Bank Co.,Ltd. Pledgor: ANHUI EGRETS ELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2023980043726 |