CN105933031B - A kind of anti-interference processing system and its working method for short-wave radio set - Google Patents
A kind of anti-interference processing system and its working method for short-wave radio set Download PDFInfo
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- CN105933031B CN105933031B CN201610238864.6A CN201610238864A CN105933031B CN 105933031 B CN105933031 B CN 105933031B CN 201610238864 A CN201610238864 A CN 201610238864A CN 105933031 B CN105933031 B CN 105933031B
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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
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
Abstract
The invention discloses a kind of anti-interference processing systems and its working method for short-wave radio set.The system is comprising several short-wave radio sets, the PC machine that each short-wave radio set is both provided with anti-interference process module and is communicated to connect with anti-interference process module, and being run in each PC machine has display control software.Short-wave radio set as transmitting terminal and shared preset information radio frequency channel frequency spectrum between the short-wave radio set as receiving terminal, the frequency spectrum have airspace several different.The present invention utilizes the existing radio station of user equipment, by increasing anti-interference process module, effectively overcomes the interference of the shortwaves such as extremely low signal-to-noise ratio, decline of signal, multipath.
Description
Technical field
The present invention relates to New Technology Of Shortwave Communication field more particularly to a kind of anti-interference processing system for short-wave radio set and
Its working method.
Background technology
Short wave communication is in a communications system always in occupation of critical role.The indomitable life of short wave communication in the field of communications
Power mainly has benefited from its some intrinsic advantage.Compared with the means of communication such as satellite communication, terrestrial microwave, coaxial cable, optical cable,
Short wave communication need not establish relay station and telecommunication can be realized, thus construction is low with maintenance cost, and the construction period is short, if
It is standby simple.It can be fixedly installed according to requirements, carry out fixed point fixed communication, can also bear or be packed into vehicle, naval vessel, fly
Mobile communication is carried out in row device；Circuit allocation is easy, and interim networking is convenient, rapid, has prodigious using flexible；To nature
Disaster or the capability to resist destruction of war are strong；Communication equipment is small, easy to be hidden, convenient for changing working frequency to hide enemy's interference
And eavesdropping, it is easy to restore after destruction.The safety reliability of short wave communication is higher than satellite communication under the state of war, therefore various countries
Military research tissue attaches great importance to the research of New Technology Of Shortwave Communication.
When special circumstances, user-side device can include mainly noise jamming by various intentional interference（Aiming formula and resistance
Plug and other noise jammings）, multi-false targets compacting interference, cheating interference, co-interfere and smart munition etc..Therefore, from
In terms of time domain, frequency domain, spatial domain and energy domain, the various of spatial distribution interfere intentionally, unintentionally, constitute complicated wartime electromagnetism ring
Border causes serious interference to short wave communication.
In addition, in the use of short-wave radio set, the problem of generally existing communication distance deficiency and communications anti-jamming difference.Sea
With the efficient communication for being required to completion message and voice under complex electromagnetic environment with land station；Airborne station more lays particular stress on language
The efficient communication of sound, it is desirable that radio station is easy to operate efficiently.
Invention content
To solve the above problems, technical solution a kind of easy to operate and strong antijamming capability is provided, the present invention provides
A kind of anti-interference processing system and its working method for short-wave radio set.
The system include several short-wave radio sets, each short-wave radio set be both provided with anti-interference process module and with it is anti-interference
The PC machine of processing module communication connection, in each PC machine operation have display control software;Short-wave radio set and work as transmitting terminal
Preset information radio frequency channel frequency spectrum is shared between the short-wave radio set of receiving terminal, which has frequency wave several different
Road.
Display control software in PC machine is for realizing PC machine to short-wave radio set sending station control command, message and pattern
Control information, display control process and relevant information in PC machine；Wherein, radio station control command is used to control the receipts of short-wave radio set
Hair switching, the airspace selection of business information, also control the short-wave radio set of the short-wave radio set and receiving terminal as transmitting terminal
Slot synchronization, frequency-hopping synchronization send synchronization character to realize secondary frequency hopping；The message and mode control information are anti-for controlling
The type selection of business information and the spread spectrum mode of business information select in interference module.
Anti-interference process module is used to the radio station control command that PC machine is sent out being transferred to short-wave radio set, and according to message and
The information that mode control information receives short-wave radio set or sends carries out anti-interference process, and anti-interference process module is also to PC machine
Feedback channel situation is so that PC machine adjusts message and mode control information according to the status information of channel, to realize adaptive expand
Frequently.
Further, the serial data of radio station remote control command information includes start bit, the data bit comprising remote information, verification
Position, end position；The serial data of message and mode control information includes start bit, believes comprising message content information and spread spectrum mode
The data bit of breath, check bit, stop bits；The check bit of the check bit of radio station remote control command information and message and mode control information
It is different.
Further, the data bit of message and mode control information is the pseudo-random sequence of two groups of 16bit.
Further, anti-interference process module includes hardware components and software section, and wherein hardware components are configured to：Sound
Frequency power transformer connects after being sequentially connected with audio-frequency amplifier, active low-pass filter, the first audio A GC, audio-frequency amplifier, ADC
Output end to the input terminal of FPGA, FPGA is sequentially connected with DAC, active low-pass filter, the second audio A GC, audio-frequency transformer；
First audio A GC is connect with the second audio A GC full duplexs, and tie point is connect with FPGA.
DSP/RAM is connect with FPGA full duplexs, and DSP/RAM is complete double respectively with memory, 600bps acoustic code codecs
Work connects, and DSP/RAM is provided with data communication interface and radio station control interface.
600bps acoustic code codecs are used to convert analog voice to digital voice data or by voice coder yardage
According to being converted into analog voice.
The modulated signal that DAC is used to convert the signal after MSK orthogonal modulations in tonal range.
ADC is used to convert audio signal to digital voice data.
Active low-pass filter connected in sequence, the second audio A GC, audio-frequency transformer are used to carry out modulated signal corresponding
Processing, the audio-frequency transformer will treated that audio signal is sent to short-wave radio set.
Software section is configured to：
Including business information selecting module, information coding and interleaving block, spread processing module, framing module, frequency conversion with
Filter module, channel estimation and equalization module, synchronization acquistion module, despreading module, deinterleaving and channel decoding module, business letter
Cease selecting module.
Business information selecting module be used for the data received according to externally input control information with audio signal or
The form of person's message information is transferred to information coding and interleaving block, and the information after deinterleaving, decoding is passed through sound
Frequency signal or message information transfer out.
Information coding is used to the output data of business information selecting module carrying out channel code and interleaving with interleaving block
It is sent into spread spectrum mode selecting module afterwards.
Spread spectrum mode selects processing module to be used to be carried out the data information after intertexture according to externally input control information
High disposal gain spread processing or reduction process gain spread processing, and data are sent into framing module by treated.
Framing module is for combining the data after spread processing with externally input control information, frame synchronization head
Form data frame.
MSK modulation modules are used to be sent into DAC after data frame is carried out MSK adjustment.
Frequency conversion is used to carry out frequency conversion and filtering to data frame with filter module, and exports and give channel estimation and equalization module.
Channel estimation and equalization module carries out the assessment of channel status according to data frame, and then controls externally input control
Information.
Synchronization acquistion module is used to use related operation, the synchronization and capture of complete paired data frame synchronization head.
Module is de-spread to be used to carry out lower to data information according to the externally input control information in data-frame sync head
Manage gain despreading or high disposal gain despreading.
It deinterleaves and channel decoding module is used to be deinterleaved the data information in data frame and channel decoding, decoding
Information afterwards is transferred to business information selecting module.
The working method of above system includes secondary frequency hopping control flow, adaptive spread spectrum control flow, wherein secondary jump
Frequency control flow includes the following steps：
Step 1：Select to send the radio station of synchronization character first be host, it is slave to receive synchronization character, host and from
It has made an appointment between machine information transmit-receive time slot Ts, information radio frequency channel frequency spectrum, described information radio frequency channel frequency spectrum has several different
Frequency, respectively fi、fi+1、……fi+N, N is integer.
Step 2：Host, slave proceed by information transmission, are executed respectively in same information transmit-receive time slot Ts as flowed down
Journey：
Host：
Step1.1:The display control software control host of host sends synchronization character（Send 14 fixed characters）, frequency
It is fixed as fi, Timer Controlling sending time slots length Ts reaches Ts and then continued waiting for into Step1.2 if do not arrived.
Step1.2:Display control software controls host radio station and receives the confirmation of synchronization character that slave is sent, Timer Controlling
Sending time slots length Ts reaches Ts and is then continued waiting for into Step1.3 if do not arrived.
Step1.3：Display control software judges whether host receives the confirmation of synchronization character that slave is sent, if received
It arrives, host acknowledgement, which synchronizes, to be established, and into Step4, if do not received, enters Step1.1.
Step1.4：Host sends the business information of user in Ts, and frequency is fixed as fi+1, Timer Controlling sending time slots
Length Ts reaches Ts and is then continued waiting for into Step1.5 if do not arrived.
Step1.5：Host receives the business information of slave transmission in Ts, and frequency is fixed as fi+2, Timer Controlling connects
Slot length Ts is received, reaches Ts and is then continued waiting for into Step1.6 if do not arrived.
Step1.6：fi+2As fi, host repeats step1.4 and Step1.5, until having traversed information radio frequency channel frequency spectrum
All airspaces.
Slave：
Step2.1：The display control software control slave of slave, which is constantly in, to be received in time slot, and frequency is fixed as fi, and
Judge whether to receive the synchronization character that host is sent, if received, into Step2.2, if do not received, be recycled into
Step2.1。
Step2.2：Slave, which synchronizes, to be established, and frequency is fixed as fi, display control software control slave transmission confirmation of synchronization word
Symbol；Timer Controlling sending time slots are Ts, reach Ts and are then continued waiting for into Step2.3 if do not arrived.
Step2.3：Display control software controls slave and receives business information, and frequency is fixed as fi+1, Timer Controlling reception
Time slot is Ts, reaches Ts and is then continued waiting for into Step2.4 if do not arrived.
Step2.4:It controls slave and sends business information, frequency is fixed as fi+2, Timer Controlling sending time slots are Ts, are reached
It is then continued waiting for Ts into Step2.5 if do not arrived.
Step2.5：fi+2As fi, repeat step2.3 and ste2. 4, all frequencies until having traversed information radio frequency channel frequency spectrum
Rate radio frequency channel.
Adaptive spread spectrum control flow includes the following steps：
Step 1：Short-wave radio set as transmitting terminal and shared letter of making an appointment between the short-wave radio set as receiving terminal
Radio frequency channel frequency spectrum is ceased, described information radio frequency channel frequency spectrum has frequency several different, respectively fi、fi+1、……fi+N, N is integer.
Step 2：Using the short-wave radio set for being ready for sending information as transmitting terminal, prepare the short-wave radio set conduct for receiving information
Receiving terminal executes following flow respectively：
The workflow of transmitting terminal is：
Step 3.1：Display control software carries out the setting of message and mode control information according to channel situation.
Step 3.2：Radio station remote control command information, message and mode control information are transmitted to anti-by display control software simultaneously
Interference module.
Step 3.3：Business information selecting module is selected according to message and mode control information to information coding and intertexture mould
Block outgoing message information or 600bps vocoded informations.
Step 3.4：Channel code and interleaving module carries out channel code and interleaving processing to transmitting the information come, after processing
Input be sent into spread processing module.
Step 3.5：Spread processing module carries out at high-gain spread spectrum mode data according to message and mode control information
Reason or low gain spread processing mode treatment, and information is transmitted to framing module by treated.
Step 3.6：Framing module combines clip information, message and the mode control information after spread spectrum with frame synchronization head
Data frame is formed together.
Step 3.7：Data frame is transformed into analog audio signal by MSK modulation and DAC.
Step 3.8：The analog audio signal is related to audio-frequency transformer by tone filter, AGC gain control
Short-wave radio set is sent to after processing.
Step 3.9：Short-wave radio set by analog audio signal upconvert to some channel frequency in information radio frequency channel frequency spectrum into
Row is sent.
The workflow of receiving terminal is：
Step 4.1：ADC samples the audio that short-wave radio set receives, and is converted into digital audio and video signals, is transferred to change
Frequency and filter module.
Step 4.2：After frequency conversion carries out relevant treatment with filter module to digital audio and video signals, it is transmitted to channel estimation
With balance module.
Step 4.3：Channel state information is calculated in channel estimation and equalization module, and channel state information is sent to PC machine
The display control software of device, PC machine adjusts spread processing mode according to the status information of channel.
Step 4.4：Synchronization acquistion module uses related operation, completes synchronization and capture to frame synchronization head, determines despreading
Mode and business information type.
Step 4.5：It de-spreads module and spread processing is carried out to information according to determining despreading pattern and business information type.
Step 4.6：Deinterleave and channel decoding module to the information after despreading be deinterleaved and channel decoding after by its
It is sent to business information selecting module.
Step 4.7：Business information selecting module according to message and mode control information selection outgoing message information or
600bps vocoded informations, message information are admitted to display control software, and 600bps vocoded informations are admitted to 600bps
Acoustic code codec is to revert to analog voice.
Further, synchronization character is made of 14 fixed characters.
Further, business information is made of 14 service character.
Description of the drawings
Fig. 1 be radio station remote control command information, message and mode control information data format figure.
Fig. 2 is the hardware architecture diagram of immunity module.
Fig. 3 is secondary frequency hopping flow chart.
Fig. 4 is the data handling procedure schematic diagram in immunity module in adaptive spread spectrum flow.
Specific implementation mode
System of the present invention includes several short-wave radio sets, and each short-wave radio set, which is correspondingly arranged on, communicates with connection
PC machine and anti-interference process module.Operation has display control software in each PC machine.Short-wave radio set as transmitting terminal and conduct
Shared information radio frequency channel frequency spectrum between the short-wave radio set of receiving terminal, the frequency spectrum have the N number of different airspace pre-set,
For convenience of differentiation, respectively marked as fi、fi+1、……fi+N, N is integer.
Display control software in PC machine is mainly used for realizing that software controls secondary frequency hopping and adaptive spread spectrum.It was controlling
Cheng Zhong, PC machine is to short-wave radio set sending station control command, message and mode control information.
The radio station control command is used to control the transmitting-receiving switching of short-wave radio set, display control process and correlation in PC machine
Information, also control are synchronized as the slot synchronization of the short-wave radio set of the short-wave radio set and receiving terminal of transmitting terminal, frequency-hopping synchronization, transmission
Character（Generally it is made of 14 fixed characters）, business information（Generally it is made of 14 service character）Airspace select with
Realize secondary frequency hopping.Radio station control command passes through anti-interference process module transfer to short-wave radio set.The message and scheme control
Information is used to control the type selection of business information in immunity module and the spread spectrum mode of business information selects.
Radio station remote control command information, the data format of message and mode control information it is as shown in Figure 1.
The character string of radio station remote control command information includes start bit, the data bit comprising remote information, check bit, stop bits
It sets.The character string of message and mode control information includes start bit, includes spread spectrum mode information（2 characters）Believe with message content
Breath（14 characters）Data bit, check bit, stop bits.Message and mode control information are the low 16bit of two groups of cross correlations
Pseudo-random sequence, two groups of sequences distinguish the spread processing of different mode, the main selection for controlling spread spectrum mode and business information
Type selection, and be loaded into frame synchronization head by framing module（Occupy the last 16bit of frame synchronization head）.
The check bit of radio station remote control command information is different from the check bit of message and mode control information.In the present embodiment,
When check bit is 1, indicate that transmission data are remote control command information.When check bit is 0, indicate that transmission data are message and pattern control
Information processed and message information.
In the present embodiment, business information is divided into two kinds of message information and audio signal.Spread spectrum mode is divided into reduction process increasing
Two kinds of beneficial spread spectrum mode and high disposal gain spread spectrum mode.When bad channel quality or electromagnetic environment complexity, using reduction process
Gain spread spectrum mode（Tamed spread spectrum adds repeated encoding, only supports the message information of user at this time）；When channel quality is good, using height
Processing gain spread spectrum mode（Only tamed spread spectrum had both supported transmitting message information or had supported audio signal at this time）
Anti-interference process module is used to the radio station control command that PC machine is sent out being transferred to short-wave radio set, and according to message and
The information that mode control information receives short-wave radio set or sends carries out anti-interference process, and anti-interference process module is also to PC machine
Feedback channel situation is so that PC machine adjusts message and mode control information according to the status information of channel, to realize adaptive expand
Frequently.
The structure of anti-interference processing module is described in detail below.
It includes hardware components and software section.Wherein hardware components construction such as Fig. 2：
Audio-frequency transformer and audio-frequency amplifier, active low-pass filter, the first audio A GC, audio-frequency amplifier, ADC are sequentially
Be connected to the input terminal of FPGA after connection, the output end of FPGA be sequentially connected with DAC, active low-pass filter, the second audio A GC,
Audio-frequency transformer；First audio A GC is connect with the second audio A GC full duplexs, and tie point is connect with FPGA.
DSP/RAM is connect with FPGA full duplexs, and DSP/RAM is complete double respectively with memory, 600bps acoustic code codecs
Work connects, and DSP/RAM is provided with data communication interface and radio station control interface.
600bps acoustic code codecs are used to convert analog voice to digital voice data or by voice coder yardage
According to being converted into analog voice.
The modulated signal that DAC is used to convert the signal after MSK orthogonal modulations in tonal range.
ADC is used to convert audio signal to digital voice data.
Active low-pass filter connected in sequence, the second audio A GC, audio-frequency transformer are used to carry out modulated signal corresponding
Processing, the audio-frequency transformer will treated that audio signal is sent to short-wave radio set.
Such as Fig. 2, software section is configured to：
Including business information selecting module, information coding and interleaving block, spread processing module, framing module, frequency conversion with
Filter module, channel estimation and equalization module, synchronization acquistion module, despreading module, deinterleaving and channel decoding module, business letter
Cease selecting module.
Business information selecting module be used for the data received according to externally input control information with audio signal or
The form of person's message information is transferred to information coding and interleaving block, and the information after deinterleaving, decoding is passed through sound
Frequency signal or message information transfer out.
Information coding is used to the output data of business information selecting module carrying out channel code and interleaving with interleaving block
It is sent into spread spectrum mode selecting module afterwards.
Spread spectrum mode selects processing module to be used to be carried out the data information after intertexture according to externally input control information
High disposal gain spread processing or reduction process gain spread processing, and data are sent into framing module by treated.
Framing module is for combining the data after spread processing with externally input control information, frame synchronization head
Form data frame.
MSK modulation modules are used to be sent into DAC after data frame is carried out MSK adjustment.
Frequency conversion is used to carry out frequency conversion and filtering to data frame with filter module, and exports and give channel estimation and equalization module.
Channel estimation and equalization module carries out the assessment of channel status according to data frame, and then controls externally input control
Information.Such as：Channel state information is sent into externally input control information PC machine, PC machine is adjusted according to the status information of channel
Information is controlled, to enhance interference control ability.
Synchronization acquistion module is used to use related operation, the synchronization and capture of complete paired data frame synchronization head.
Module is de-spread to be used to carry out lower to data information according to the externally input control information in data-frame sync head
Manage gain despreading or high disposal gain despreading.
It deinterleaves and channel decoding module is used to be deinterleaved the data information in data frame and channel decoding, decoding
Information afterwards is transferred to business information selecting module.
The working mechanism of anti-interference process module is related with the function of its affiliated short-wave radio set.When its affiliated short-wave radio set is
When transmitting terminal, digital voice data that anti-interference process module is converted simulated voice by 600bps acoustic code codecs
Or the message that exterior PC is sent into carries out spread spectrum and Error Correction of Coding, then by the data after coding by MSK orthogonal modulations and
DAC transformation generates the modulated signal in tonal range, and by active power filtering, AGC gain control and the processing such as audio-frequency transformer,
Finally by treated, audio signal is sent to common short-wave radio set by radio station audio interface, will be believed using common short-wave radio set
It number upconverts on some short wave channel and sends.When its affiliated short-wave radio set be receiving terminal when, common short-wave radio set from
Signal is received on corresponding short wave channel, and down coversion is restored to voice band, be then sent into from the audio output interface in radio station
Anti-interference process module, anti-interference process module demodulate the information of carrying by MSK quadrature demodulations from audio signal, then
It is sent into communication codec and despreading and correction process is carried out to these data, finally recover message data or voice coder yardage
According to.Message is sent into PC by serial ports, and vocoded data is sent directly into the 600bps acoustic code encoding and decoding of anti-interference process module
Device can recover analog voice.
The working method of this system is described in detail below.
The control method includes secondary frequency hopping control flow, adaptive spread spectrum control flow.
Secondary frequency hopping control flow includes the following steps：
Step 1：Select to send the radio station of synchronization character first be host, it is slave to receive synchronization character, host and from
It has made an appointment between machine information transmit-receive time slot Ts, information radio frequency channel frequency spectrum, described information radio frequency channel frequency spectrum has several different
Frequency, respectively fi、fi+1、……fi+N, N is integer, can be arranged as required to.
Step 2：Host, slave proceed by information transmission, are executed respectively in same information transmit-receive time slot Ts as flowed down
Journey：
Host：
Step1.1:The display control software control host of host sends synchronization character（Send 14 fixed characters）, frequency
It is fixed as fi, Timer Controlling sending time slots length Ts reaches Ts and then continued waiting for into Step1.2 if do not arrived.
Step1.2:Display control software controls host radio station and receives the confirmation of synchronization character that slave is sent, Timer Controlling
Sending time slots length Ts reaches Ts and is then continued waiting for into Step1.3 if do not arrived.
Step1.3：Display control software judges whether host receives the confirmation of synchronization character that slave is sent, if received
It arrives, host acknowledgement, which synchronizes, to be established, and into Step4, if do not received, enters Step1.1.
Step1.4：Host sends the business information of user in Ts, and frequency is fixed as fi+1, Timer Controlling sending time slots
Length Ts reaches Ts and is then continued waiting for into Step1.5 if do not arrived.
Step1.5：Host receives the business information of slave transmission in Ts, and frequency is fixed as fi+2, Timer Controlling connects
Slot length Ts is received, reaches Ts and is then continued waiting for into Step1.6 if do not arrived.
Step1.6：fi+2As fi, host repeats step1.4 and Step1.5, until having traversed information radio frequency channel frequency spectrum
All airspaces.The present embodiment uses five different frequency points, after being repeated four times, into Step4.
Slave：
Step2.1：The display control software control slave of slave, which is constantly in, to be received in time slot, and frequency is fixed as fi, and
Judge whether to receive the synchronization character that host is sent, if received, into Step2.2, if do not received, be recycled into
Step2.1。
Step2.2：Slave, which synchronizes, to be established, and frequency is fixed as fi, display control software control slave transmission confirmation of synchronization word
Symbol；Timer Controlling sending time slots are Ts, reach Ts and are then continued waiting for into Step2.3 if do not arrived.
Step2.3：Display control software controls slave and receives business information, and frequency is fixed as fi+1, Timer Controlling reception
Time slot is Ts, reaches Ts and is then continued waiting for into Step2.4 if do not arrived.
Step2.4:It controls slave and sends business information, frequency is fixed as fi+2, Timer Controlling sending time slots are Ts, are reached
It is then continued waiting for Ts into Step2.5 if do not arrived.
Step2.5：fi+2As fi, repeat step2.3 and ste2. 4, all frequencies until having traversed information radio frequency channel frequency spectrum
Rate radio frequency channel.
Adaptive spread spectrum control flow includes the following steps：
Step 1：Short-wave radio set as transmitting terminal and shared letter of making an appointment between the short-wave radio set as receiving terminal
Radio frequency channel frequency spectrum is ceased, described information radio frequency channel frequency spectrum has frequency several different, respectively fi、fi+1、……fi+N, N is whole
Number.（Information radio frequency channel frequency spectrum that this place is said and the information radio frequency channel frequency spectrum established in secondary frequency hopping are same frequency spectrum, are separated herein
It is convenient just for the sake of statement to illustrate）
Step 2：Using the short-wave radio set for being ready for sending information as transmitting terminal, prepare the short-wave radio set conduct for receiving information
Receiving terminal executes following flow respectively：
The workflow of transmitting terminal is：
Step 3.1：Display control software carries out the setting of message and mode control information according to channel situation.
Step 3.2：Radio station remote control command information, message and mode control information are transmitted to anti-by display control software simultaneously
Interference module.
Step 3.3：Business information selecting module is selected according to message and mode control information to information coding and intertexture mould
Block outgoing message information or 600bps vocoded informations.
Step 3.4：Channel code and interleaving module carries out channel code and interleaving processing to transmitting the information come, after processing
Input be sent into spread processing module.
Step 3.5：Spread processing module carries out at high-gain spread spectrum mode data according to message and mode control information
Reason or low gain spread processing mode treatment, and information is transmitted to framing module by treated.
Step 3.6：Framing module combines clip information, message and the mode control information after spread spectrum with frame synchronization head
Data frame is formed together.
Step 3.7：Data frame is transformed into analog audio signal by MSK modulation and DAC.
Step 3.8：The analog audio signal is related to audio-frequency transformer by tone filter, AGC gain control
Short-wave radio set is sent to after processing.
Step 3.9：Short-wave radio set by analog audio signal upconvert to some channel frequency in information radio frequency channel frequency spectrum into
Row is sent.
The workflow of receiving terminal is：
Step 4.1：ADC samples the audio that short-wave radio set receives, and is converted into digital audio and video signals, is transferred to change
Frequency and filter module.
Step 4.2：After frequency conversion carries out relevant treatment with filter module to digital audio and video signals, it is transmitted to channel estimation
With balance module.
Step 4.3：Channel state information is calculated in channel estimation and equalization module, and channel state information is sent to PC machine
The display control software of device, PC machine adjusts spread processing mode according to the status information of channel.
Step 4.4：Synchronization acquistion module uses related operation, completes synchronization and capture to frame synchronization head, determines despreading
Mode and business information type.
Step 4.5：It de-spreads module and spread processing is carried out to information according to determining despreading pattern and business information type.
Step 4.6：Deinterleave and channel decoding module to the information after despreading be deinterleaved and channel decoding after by its
It is sent to business information selecting module.
Step 4.7：Business information selecting module according to message and mode control information selection outgoing message information or
600bps vocoded informations, message information are admitted to display control software, and 600bps vocoded informations are admitted to 600bps
Acoustic code codec is to revert to analog voice.
Beneficial effects of the present invention are：
The present invention utilizes the existing radio station of user equipment, by increasing anti-interference process module, by test, in signal-to-noise ratio
Less than -13dB（Multi-tone jamming）Under short wave communication channel condition below, as a result of immunity module, to effective gram
The interference of the shortwaves such as extremely low signal-to-noise ratio, decline of signal, multipath has been taken, and then may be implemented in signal-to-noise ratio and be less than -13dB（Multitone is dry
It disturbs）Under conditions of extremely low rate（General rate is in 70~100bps）Information transmission.When channel condition is preferable, it can be achieved that
600bps voice communications can guarantee the connectivity of Shortwave Communication System in this way, realize the timely reception and registration of important information.
Claims (7)
1. a kind of anti-interference processing system for short-wave radio set, which is characterized in that include several short-wave radio sets, each shortwave electricity
The PC machine that platform is both provided with anti-interference process module and is communicated to connect with anti-interference process module, in each PC machine operation have display
Control software;Short-wave radio set as transmitting terminal and shared preset intelligence wave between the short-wave radio set as receiving terminal
Road frequency spectrum, the information radio frequency channel frequency spectrum have airspace several different；
Display control software in PC machine is for realizing PC machine to short-wave radio set sending station control command, message and scheme control
Information, display control process and relevant information in PC machine；Wherein, radio station control command is cut for controlling the transmitting-receiving of short-wave radio set
It changes, the selection of the airspace of business information, also time slot of the control as the short-wave radio set of the short-wave radio set and receiving terminal of transmitting terminal
Synchronization, frequency-hopping synchronization send synchronization character to realize secondary frequency hopping；The message and mode control information are anti-interference for controlling
The type selection of business information and the spread spectrum mode of business information select in module；
Anti-interference process module is used to the radio station control command that PC machine is sent out being transferred to short-wave radio set, and according to message and pattern
It controls the information that information receives short-wave radio set or sends and carries out anti-interference process, and anti-interference process module is also fed back to PC machine
Channel situation is so that PC machine adjusts message and mode control information according to the status information of channel, to realize adaptive spread spectrum.
2. being used for the anti-interference processing system of short-wave radio set as described in claim 1, which is characterized in that constitute radio station remote control life
The character string of order includes start bit, the data bit comprising remote information, check bit, end position；Constitute message and scheme control
The character string of information includes start bit, the data bit comprising message content information and spread spectrum mode information, check bit, stop bits；
The check bit of radio station remote control command is different from the check bit of message and mode control information.
3. being used for the anti-interference processing system of short-wave radio set as claimed in claim 2, which is characterized in that message and scheme control
The data bit of information is the pseudo-random sequence of two groups of 16bit.
4. as claim 1 ~ 3 any one of them is used for the anti-interference processing system of short-wave radio set, which is characterized in that anti-interference
Processing module includes hardware components and software section, and wherein hardware components are configured to：
Audio-frequency transformer is sequentially connected with audio-frequency amplifier, active low-pass filter, the first audio A GC, audio-frequency amplifier, ADC
It is connected to the input terminal of FPGA afterwards, the output end of FPGA is sequentially connected with DAC, active low-pass filter, the second audio A GC, audio
Transformer；First audio A GC is connect with the second audio A GC full duplexs, and tie point is connect with FPGA；
DSP/RAM is connect with FPGA full duplexs, and DSP/RAM connects with memory, 600bps acoustic code codecs difference full duplex
It connects, DSP/RAM is provided with data communication interface and radio station control interface；
600bps acoustic code codecs are used to convert analog voice to digital voice data or turn vocoded data
Turn to analog voice；
The modulated signal that DAC is used to convert the signal after MSK orthogonal modulations in tonal range；
ADC is used to convert audio signal to digital voice data；
Active low-pass filter connected in sequence, the second audio A GC, audio-frequency transformer for locating modulated signal accordingly
Reason, by treated, audio signal is sent to short-wave radio set to the audio-frequency transformer；
Software section is configured to：
Including business information selecting module, information coding and interleaving block, spread processing module, framing module, frequency conversion and filtering
Module, channel estimation and equalization module, synchronization acquistion module, despreading module, deinterleaving and channel decoding module, business information choosing
Select module；
Business information selecting module is used for the data received according to externally input control information with audio signal or report
The form of literary information is transferred to information coding and interleaving block, and the information after deinterleaving, decoding is believed by audio
Number or message information transfer out；
Information coding is used to after the output data of business information selecting module is carried out channel code and interleaving send with interleaving block
Enter spread spectrum mode selecting module；
Spread spectrum mode selects processing module to be used to that the data information after intertexture to be carried out eminence according to externally input control information
Gain signal spread processing or reduction process gain signal spread processing are managed, and data are sent into framing module by treated；
Data after spread processing for being grouped together by framing module with externally input control information, frame synchronization head
Data frame；
MSK modulation modules are used to be sent into DAC after data frame is carried out MSK adjustment；
Frequency conversion is used to carry out frequency conversion and filtering to data frame with filter module, and exports and give channel estimation and equalization module；
Channel estimation and equalization module carries out the assessment of channel status according to data frame, and then controls externally input control letter
Breath；
Synchronization acquistion module is used to use related operation, the synchronization and capture of complete paired data frame synchronization head；
Module is de-spread to be used to carry out reduction process increasing to data information according to the externally input control information in data-frame sync head
Benefit despreading or high disposal gain despreading；
It deinterleaves and channel decoding module is used to be deinterleaved the data information in data frame and channel decoding, after decoding
Information is transferred to business information selecting module.
5. the working method for the anti-interference processing system of short-wave radio set as claimed in claim 4, which is characterized in that described
Working method includes secondary frequency hopping control flow, adaptive spread spectrum control flow, wherein secondary frequency hopping control flow includes as follows
Step：
Step 1：Select to send the radio station of synchronization character first be host, it is slave to receive synchronization character, host and slave it
Between made an appointment information transmit-receive time slot Ts, information radio frequency channel frequency spectrum, described information radio frequency channel frequency spectrum has frequency several different,
Respectively fi、fi+1、……fi+N, N is integer；
Step 2：Host, slave proceed by information transmission, and following flow is executed respectively in same information transmit-receive time slot Ts：
Host：
Step1.1:The display control software control host of host sends synchronization character, and frequency is fixed as fi, Timer Controlling transmission
Slot length Ts reaches Ts and is then continued waiting for into Step1.2 if do not arrived；
Step1.2:Display control software controls host radio station and receives the confirmation of synchronization character that slave is sent, and Timer Controlling is sent
Slot length Ts reaches Ts and is then continued waiting for into Step1.3 if do not arrived；
Step1.3：Display control software judges whether host receives the confirmation of synchronization character that slave is sent, main if received
Machine confirms synchronous foundation, into Step1.4, if do not received, enters Step1.1；
Step1.4：Host sends the business information of user in Ts, and frequency is fixed as fi+1, Timer Controlling sending time slots length
Ts reaches Ts and is then continued waiting for into Step1.5 if do not arrived；
Step1.5：Host receives the business information of slave transmission in Ts, and frequency is fixed as fi+2, when Timer Controlling receives
Gap length Ts reaches Ts and is then continued waiting for into Step1.6 if do not arrived；
Step1.6：fi+2As fi, host repeats step1.4 and Step1.5, the institute until having traversed information radio frequency channel frequency spectrum
There is airspace；
Slave：
Step2.1：The display control software control slave of slave, which is constantly in, to be received in time slot, and frequency is fixed as fi, and judgement is
The no synchronization character for receiving host and sending, into Step2.2, if do not received, is recycled into Step2.1 if received；
Step2.2：Slave, which synchronizes, to be established, and frequency is fixed as fi, display control software control slave transmission confirmation of synchronization character；It is fixed
When device control sending time slots be Ts, reach Ts and then continued waiting for into Step2.3 if do not arrived；
Step2.3：Display control software controls slave and receives business information, and frequency is fixed as fi+1, Timer Controlling reception time slot
For Ts, reaches Ts and then continued waiting for into Step2.4 if do not arrived；
Step2.4:It controls slave and sends business information, frequency is fixed as fi+2, Timer Controlling sending time slots are Ts, reach Ts
Then continued waiting for into Step2.5 if do not arrived；
Step2.5：fi+2As fi, repeat step2.3 and ste2. 4, all frequency waves until having traversed information radio frequency channel frequency spectrum
Road;
Adaptive spread spectrum control flow includes the following steps：
Step 1：Short-wave radio set as transmitting terminal and shared information wave of having made an appointment between the short-wave radio set as receiving terminal
Road frequency spectrum, described information radio frequency channel frequency spectrum have frequency several different, respectively fi、fi+1、……fi+N, N is integer；
Step 2：Using the short-wave radio set for being ready for sending information as transmitting terminal, prepare the short-wave radio set of reception information as reception
End, executes following flow respectively：
The workflow of transmitting terminal is：
Step 3.1：Display control software carries out the setting of message and mode control information according to channel situation；
Step 3.2：Radio station remote control command information, message and mode control information are transmitted to anti-interference by display control software simultaneously
Module；
Step 3.3：Business information selecting module selects defeated with interleaving block to information coding according to message and mode control information
Outgoing packet information or 600bps vocoded informations;
Step 3.4：Channel code and interleaving module carries out channel code and interleaving processing to transmitting the information come, and it is defeated that treated
Enter to be sent into spread processing module；
Step 3.5：Spread processing module according to message and mode control information to data carry out the processing of high-gain spread spectrum mode or
Person's low gain spread processing mode treatment, and information is transmitted to framing module by treated;
Step 3.6：Framing module by after spread spectrum clip information, message and mode control information and frame synchronization head combine
Form data frame；
Step 3.7：Data frame is transformed into analog audio signal by MSK modulation and DAC；
Step 3.8：The analog audio signal is by tone filter, the relevant treatment of AGC gain control and audio-frequency transformer
After be sent to short-wave radio set;
Step 3.9：Short-wave radio set sends out some channel frequency that analog audio signal upconverts in information radio frequency channel frequency spectrum
It send；
The workflow of receiving terminal is：
Step 4.1：ADC samples the audio that short-wave radio set receives, and is converted into digital audio and video signals, be transferred to frequency conversion with
Filter module；
Step 4.2：After frequency conversion and filter module carry out relevant treatment to digital audio and video signals, be transmitted to channel estimation with
Weigh module；
Step 4.3：Channel state information is calculated in channel estimation and equalization module, and channel state information is sent to PC machine device,
The display control software of PC machine adjusts spread processing mode according to the status information of channel；
Step 4.4：Synchronization acquistion module uses related operation, completes synchronization and capture to frame synchronization head, determines despreading mode
With business information type；
Step 4.5：Despreading module carries out despreading processing according to determining despreading pattern and business information type to information；
Step 4.6：Deinterleave and channel decoding module to the information after despreading be deinterleaved and channel decoding after be sent to
To business information selecting module;
Step 4.7：Business information selecting module is according to message and mode control information selection outgoing message information or 600bps
Vocoded information, message information are admitted to display control software, and 600bps vocoded informations are admitted to 600bps acoustic codes
Codec is to revert to analog voice.
6. the working method for the anti-interference processing system of short-wave radio set as described in claim 1, which is characterized in that synchronous
Character is made of 14 fixed characters.
7. the working method for the anti-interference processing system of short-wave radio set as described in claim 1, which is characterized in that business
Information is made of 14 service character.
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| EP1587258A2 (en) * | 2004-04-16 | 2005-10-19 | Intracom S.A. Hellenic Telecommunications & Electronics Industry | Wideband intercom and secure pocket radio (WISPR) |
| CN101668303A (en) * | 2009-09-24 | 2010-03-10 | 武汉中元通信股份有限公司 | Field united testing communication simulation method and platform of dual-band broadband radio |
| CN104883204A (en) * | 2015-05-26 | 2015-09-02 | 南昌大学 | Short-wave frequency hopping communication system based on general software radio platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1587258A2 (en) * | 2004-04-16 | 2005-10-19 | Intracom S.A. Hellenic Telecommunications & Electronics Industry | Wideband intercom and secure pocket radio (WISPR) |
| CN101668303A (en) * | 2009-09-24 | 2010-03-10 | 武汉中元通信股份有限公司 | Field united testing communication simulation method and platform of dual-band broadband radio |
| CN104883204A (en) * | 2015-05-26 | 2015-09-02 | 南昌大学 | Short-wave frequency hopping communication system based on general software radio platform |
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