CN105959036B - A kind of automatic spread spectrum system of short-wave radio set that software controls and its automatic spectrum spreading method - Google Patents
A kind of automatic spread spectrum system of short-wave radio set that software controls and its automatic spectrum spreading method Download PDFInfo
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- CN105959036B CN105959036B CN201610238964.9A CN201610238964A CN105959036B CN 105959036 B CN105959036 B CN 105959036B CN 201610238964 A CN201610238964 A CN 201610238964A CN 105959036 B CN105959036 B CN 105959036B
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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
- H04B1/711—Interference-related aspects the interference being multi-path interference
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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
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
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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
- H04B1/7073—Synchronisation aspects
- H04B1/7087—Carrier synchronisation 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
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- Computer Networks & Wireless Communication (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses the short-wave radio set adaptive spread spectrum systems and its adaptive spread spectrum method of a kind of control of software.The system includes several short-wave radio sets, and each short-wave radio set is correspondingly arranged on the PC machine and immunity module for communicating with connection, and being run in each PC machine has display control software；Short-wave radio set as transmitting terminal and shared information radio frequency channel frequency spectrum between the short-wave radio set as receiving terminal, the frequency spectrum have the airspace several different pre-set.The present invention utilizes the existing radio station of user equipment, and the setting by increasing anti-interference process module and software realizes adaptive spread spectrum.
Description
Technical field
The present invention relates to the short-wave radio set adaptive spread spectrum systems that New Technology Of Shortwave Communication field more particularly to a kind of software control
System and its adaptive spread spectrum 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.
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.
Moreover, there is presently no the technology for using software to transmit progress adaptive spread spectrum control to short-wave radio set information, adopt
Spread spectrum can be preferably controlled with software control, is conducive to the transmission of signal.
Invention content
To solve the above problems, the present invention provides a kind of short-wave radio set adaptive spread spectrum systems of software control, including
Several short-wave radio sets, each short-wave radio set are correspondingly arranged on the PC machine and immunity module for communicating with connection, each PC machine
Upper operation has display control software；Short-wave radio set as transmitting terminal and shared information wave between the short-wave radio set as receiving terminal
Road frequency spectrum, the frequency spectrum have the airspace several different pre-set.
The display control software is used to believe to immunity module sending station remote control command information, message and scheme control
Breath, and according to the channel state information adjustment message and mode control information of immunity module feedback, and to control process into
Row display；The radio station remote control command information is used to control the switching of short-wave radio set transmitting-receiving, the airspace selection of business information,
The message and mode control information are used to control type selection and the spread spectrum of business information of business information in immunity module
Mode selects.
The information that immunity module is used to receive short-wave radio set or send carries out anti-interference process comprising hardware components
With software section, wherein hardware components are configured to：
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.
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 message and mode 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 message and mode 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 used for the data and message and mode control information, frame synchronization head, training sequence after spread processing
It is grouped together into 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 training sequence（Channel estimating passes through training sequence
Calculate the signal-to-noise ratio for receiving signal）, by channel state information（Receive Signal-to-Noise）It is sent in PC machine, PC machine is according to channel
Status information adjusts message and mode control information, infomational message and mode control information.
Synchronization acquistion module is used to use related operation, the synchronization and capture of complete paired data frame synchronization head.
De-spread module be used for according in data-frame sync head message and mode control information to data information carry out lower
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.
Further, 600bps acoustic codes codec is provided with microphone input interface, speaker output interface.
The adaptive spread spectrum method of above-mentioned system 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.
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 1：Display control software carries out the setting of message and mode control information according to channel situation.
Step 2：Radio station remote control command information, message and mode control information are transmitted to anti-dry by display control software simultaneously
Disturb module.
Step 3：Business information selecting module is selected according to message and mode control information to information coding and interleaving block
Outgoing message information or 600bps vocoded informations.
Step 4：Channel code and interleaving module carries out channel code and interleaving processing to transmitting the information come, and treated
Spread processing module is sent into input.
Step 5：Spread processing module carries out high-gain spread spectrum mode processing according to message and mode control information to data
Or low gain spread processing mode treatment, and information is transmitted to framing module by treated.
Step 6：Framing module combines clip information, message and the mode control information after spread spectrum one with frame synchronization head
It rises and forms data frame.
Step 7：Data frame is transformed into analog audio signal by MSK modulation and DAC.
Step 8：The analog audio signal is by tone filter, AGC gain control place related to audio-frequency transformer
Short-wave radio set is sent to after reason.
Step 9：Analog audio signal is upconverted to some channel frequency in information radio frequency channel frequency spectrum and carried out by short-wave radio set
It sends.
The workflow of receiving terminal is：
Step 1：ADC samples the audio that short-wave radio set receives, and is converted into digital audio and video signals, is transferred to frequency conversion
With filter module.
Step 2：After frequency conversion and filter module carry out relevant treatment to digital audio and video signals, be transmitted to channel estimation with
Balance module.
Step 3：Channel state information is calculated in channel estimation and equalization module, and channel state information is sent to PC machine,
PC machine adjusts spread processing mode according to the status information of channel.Being achieved in that for the adjustment changes message and scheme control letter
The character string of breath.
Step 4：Synchronization acquistion module uses related operation, completes synchronization and capture to frame synchronization head, determines despreading side
Formula and business information type.
Step 5：It de-spreads module and spread processing is carried out to information according to determining despreading pattern and business information type.
Step 6：Deinterleave and channel decoding module to the information after despreading be deinterleaved and channel decoding after given
Enter to business information selecting module.
Step 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, 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 pseudorandom sequence of two groups of low 16bit of cross correlation
Row.
Beneficial effects of the present invention are：
The present invention utilizes the existing radio station of user equipment, and the setting by increasing anti-interference process module and software realizes
Adaptive spread spectrum.By test, it is less than -13dB in signal-to-noise ratio（Multi-tone jamming）Under short wave communication channel condition below, due to
Immunity module is used, to effectively overcome the interference of the shortwaves such as extremely low signal-to-noise ratio, decline of signal, multipath, Jin Erke
It realizes and is less than -13dB in signal-to-noise ratio（Multi-tone jamming）Under conditions of extremely low rate（General rate is in 70~100bps）Information
Transmission.It is real when channel condition is preferable, it can be achieved that 600bps voice communications, can guarantee the connectivity of Shortwave Communication System in this way
The timely reception and registration of existing important information.
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 the flow chart of data processing schematic diagram in immunity module.
Specific implementation mode
The present invention design concept be：The adaptive spread spectrum technology based on software of design, core is according to channel situation system
System is automatic or user changes spread spectrum mode manually, and spreading gain is changed with this.When bad channel quality or electromagnetic environment are multiple
When miscellaneous, using reduction process gain spread spectrum mode（Tamed spread spectrum adds repeated encoding, only supports the message information of user at this time）；Work as channel
When high-quality, using high disposal gain spread spectrum mode（Only tamed spread spectrum had both supported transmitting message information or voice is supported to believe at this time
Breath）.A kind of immunity module is designed, which can realize adaptive spread spectrum in real time to software feedback channel basic condition.
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 immunity module.Operation has display control software in each PC machine.As the short-wave radio set of transmitting terminal and as reception
Shared information radio frequency channel frequency spectrum between the short-wave radio set at end, the frequency spectrum have the N number of different airspace pre-set, for side
Just it distinguishes, respectively marked as fi、fi+1、……fi+N, N is integer.Display control software and immunity module are given respectively below
To introduce.
One, display control softwares
The display control software is used to believe to immunity module sending station remote control command information, message and scheme control
Breath, and according to the channel state information adjustment message and mode control information of immunity module feedback, and to control process into
Row display.The radio station remote control command information is transferred directly to radio station through immunity module and carries out transmitting-receiving switching for controlling radio station
Or change the operations such as frequency.The message and mode control information are used to control type selection and the industry of business information in immunity module
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.
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.
Message and the pseudo-random sequence that mode control information is two groups of low 16bit of cross correlation, two groups of sequences are distinguished not
With the spread processing of pattern, the type selection of the main selection for controlling spread spectrum mode and business information, and added by framing module
It is downloaded in frame synchronization head（Occupy the last 16bit of frame synchronization head）.
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）.
Two, immunity modules
Information for receiving or sending to short-wave radio set carries out anti-interference process, including hardware components and software section.
As shown in Fig. 2, hardware components are configured to：
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, the audio-frequency transformer have audio output.First audio A GC is connect with the second audio A GC full duplexs, and even
Contact is connect with FPGA.
DSP/RAM is connect with FPGA full duplexs.DSP/RAM is complete double respectively with memory, 600bps acoustic code codecs
Work connects, and DSP/RAM is provided with data communication interface, radio station control interface.600bps acoustic code codecs are provided with microphone
Input interface, speaker output 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.
As shown in figure 3, software section is designed as：
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.
There are two the functions of business information selecting module：1. the number that will be received according to infomational message and mode control information
Audio signal or the form of message information are for transmission to information coding and interleaving block according to this.2. according to infomational message and mould
Formula control information transfers out the information after deinterleaving, decoding by audio signal or message information.In this implementation
In example, message and mode control information are generally PC machine and send out, but also do not interfere message and mode control information can be by
Inside modules generate.Audio signal is received by 600bps acoustic code codec transmissions to be come.
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 message and mode control information
High disposal gain spread processing or reduction process gain spread processing, and the data information after spread processing is sent into framing module.
Framing module is for combining the data information after spread processing with message and mode control information, frame synchronization head
Data frame is formed together.
MSK modulation modules are used to be sent into DAC module 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 training sequence（Channel estimating passes through training sequence
Calculate the signal-to-noise ratio for receiving signal）, by channel state information（Receive Signal-to-Noise）It is sent in PC machine, PC machine is according to channel
Status information adjusts message and mode control information, infomational message and mode control information.
Synchronization acquistion module is used to use related operation, the synchronization and capture of complete paired data frame synchronization head to determine despreading
Mode and business information type.
De-spread module be used for according in data-frame sync head message and mode control information in data frame data believe
Breath carries out reduction process 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 immunity module is related in the function of its affiliated short-wave radio set.When its affiliated short-wave radio set is to send
When end, digital voice data that antijam communication 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 becomes the data after coding by MSK orthogonal modulations and DAC
The modulated signal generated in tonal range is changed, and by processing such as active power filtering, AGC gain control and audio-frequency transformers, finally
By treated, audio signal is sent to common short-wave radio set by radio station audio interface, will be on signal using common short-wave radio set
It is converted on some short wave channel and sends.When its affiliated short-wave radio set is receiving terminal, common short-wave radio set is from correspondence
Short wave channel on receive signal, and down coversion is restored to voice band, is then sent into from the audio output interface in radio station anti-dry
Communication module is disturbed, antijam communication module is demodulated the information of carrying from audio signal by MSK quadrature demodulations, is then fed into
Communication codec carries out despreading and correction process to these data, finally recovers message data or vocoded data.
Message is sent into PC by serial ports, and the 600bps acoustic codes codec that vocoded data is sent directly into immunity module can be extensive
It appears again analog voice.
The adaptive spread spectrum method of above system is illustrated below.
Step 1：Short-wave radio set as transmitting terminal and shared information radio frequency channel frequency between the short-wave radio set as receiving terminal
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 conduct for receiving information
Receiving terminal.
Wherein, the workflow of transmitting terminal is：
Step 1：Display control software carries out the setting of message and mode control information according to channel situation.
Step 2：Radio station remote control command information, message and mode control information are transmitted to anti-dry by display control software simultaneously
Disturb module.
Step 3：Business information selecting module is selected according to message and mode control information to information coding and interleaving block
Outgoing message information or 600bps vocoded informations.
Step 4：Channel code and interleaving module carries out channel code and interleaving processing to transmitting the information come, and treated
Spread processing module is sent into input.
Step 5：Spread processing module carries out high disposal gain spread spectrum mode according to message and mode control information to data
Or the spread processing mode treatment of low gain, and information is transmitted to framing module by treated.
Step 6：Framing module combines clip information, message and the mode control information after spread spectrum one with frame synchronization head
It rises and forms data frame.
Step 7：Data frame is transformed into analog audio signal by MSK modulation and DAC.
Step 8：The analog audio signal is by tone filter, AGC gain control place related to audio-frequency transformer
Short-wave radio set is sent to after reason.
Step 9：Analog audio signal is upconverted to some channel frequency in information radio frequency channel frequency spectrum and carried out by short-wave radio set
It sends.
The workflow of receiving terminal is：
Step 1：ADC samples the audio that short-wave radio set receives, and is converted into digital audio and video signals, is transferred to frequency conversion
With filter module.
Step 2：After frequency conversion and filter module carry out relevant treatment to digital audio and video signals, be transmitted to channel estimation with
Balance module.
Step 3：Channel state information is calculated in channel estimation and equalization module, and channel state information is sent to PC, PC
The display control software of machine adjusts spread processing mode according to the status information of channel.
Step 4：Synchronization acquistion module uses related operation, completes synchronization and capture to frame synchronization head, determines despreading side
Formula and business information type.
Step 5：It de-spreads module and spread processing is carried out to information according to determining despreading pattern and business information type.
Step 6：Deinterleave and channel decoding module to the information after despreading be deinterleaved and channel decoding after given
Enter to business information selecting module.
Step 7：Business information selecting module according to message and mode control information selection outgoing message information or
600bps vocoded informations are directly sent into display control software when for message information by serial ports, when for 600bps voices
It is sent directly into Voice decoder when coding information and restores analog voice.
Claims (5)
1. a kind of short-wave radio set adaptive spread spectrum system of software control, which is characterized in that include several short-wave radio sets, it is each short
Wave radio station is correspondingly arranged on the PC machine and immunity module for communicating with connection, and being run in each PC machine has display control soft
Part；Short-wave radio set as transmitting terminal and shared information radio frequency channel frequency spectrum between the short-wave radio set as receiving terminal, the frequency spectrum have
The airspace several different pre-set；
The display control software is used for immunity module sending station remote control command information, message and mode control information,
According to the channel state information adjustment message and mode control information of immunity module feedback, and process is controlled to adaptive spread spectrum
It is shown；The radio station remote control command information is used to control the switching of short-wave radio set transmitting-receiving, the airspace choosing of business information
It selects, the type selection and the expansion of business information of the message and mode control information for controlling business information in immunity module
Frequency mode selects；
Immunity module be used for short-wave radio set receive or send information carry out anti-interference process comprising hardware components with it is soft
Part part, 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 message and mode 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 message and mode control information
Gain spread processing or reduction process gain spread processing are managed, and data are sent into framing module by treated；
Framing module is for combining the data after spread processing with message and mode control information, frame synchronization head, training sequence
Data frame is formed together；
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 training sequence, and channel state information is sent to PC machine
In, PC machine adjusts message and mode control information according to channel state information；
Synchronization acquistion module is used to use related operation, the synchronization and capture of complete paired data frame synchronization head；
De-spread module be used for according in data-frame sync head message and mode control information to data information carry out reduction process increasing
Beneficial spread-spectrum signal despreading or the despreading of high disposal gain spread-spectrum signal；
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.
2. the short-wave radio set adaptive spread spectrum system of software control as described in claim 1, which is characterized in that 600bps acoustic codes
Change codec and is provided with microphone input interface, speaker output interface.
3. the short-wave radio set adaptive spread spectrum system of software control as described in claim 1, which is characterized in that radio station remote control life
It includes start bit, the data bit comprising remote information, check bit, end position to enable the serial data of information；Message and scheme control
The serial data 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 information is different from the check bit of message and mode control information.
4. the short-wave radio set adaptive spread spectrum system of software control as described in claim 1, which is characterized in that message and pattern
The data bit for controlling information is the pseudo-random sequence of two groups of 16bit.
5. the adaptive spread spectrum method of the short-wave radio set adaptive spread spectrum system of software control as described in claim 1, special
Sign is, includes the following steps：
Step 1：Short-wave radio set as transmitting terminal and shared information of making an appointment between the short-wave radio set as receiving terminal
Radio frequency channel 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 1：Display control software carries out the setting of message and mode control information according to channel situation；
Step 2：Radio station remote control command information, message and mode control information are transmitted to anti-interference mould by display control software simultaneously
Block；
Step 3：Business information selecting module selects to export to information coding and interleaving block according to message and mode control information
Message information or 600bps vocoded informations;
Step 4：Channel code and interleaving module carries out channel code and interleaving processing to transmitting the information come, input that treated
It is sent into spread processing module；
Step 5：Spread processing module according to message and mode control information to data carry out the processing of high-gain spread spectrum mode or
Low gain spread processing mode treatment, and information is transmitted to framing module by treated;
Step 6：Framing module by after spread spectrum clip information, message and mode control information and frame synchronization head combine shape
At data frame；
Step 7：Data frame is transformed into analog audio signal by MSK modulation and DAC；
Step 8：The analog audio signal is after the relevant treatment of tone filter, AGC gain control and audio-frequency transformer
It is sent to short-wave radio set;
Step 9：Short-wave radio set sends some channel frequency that analog audio signal upconverts in information radio frequency channel frequency spectrum；
The workflow of receiving terminal is：
Step 1：ADC samples the audio that short-wave radio set receives, and is converted into digital audio and video signals, is transferred to frequency conversion and filter
Wave module；
Step 2：After frequency conversion carries out relevant treatment with filter module to digital audio and video signals, it is transmitted to channel estimation and equalization
Module；
Step 3：Channel state information is calculated in channel estimation and equalization module, and channel state information is sent to PC machine device, PC
The display control software of machine adjusts spread processing mode according to the status information of channel；
Step 4：Synchronization acquistion module uses related operation, completes synchronization and capture to frame synchronization head, determine despreading mode and
Business information type；
Step 5：Spread spectrum module carries out spread processing according to determining despreading pattern and business information type to information；
Step 6：Deinterleave and channel decoding module to the information after despreading be deinterleaved and channel decoding after be sent to
Business information selecting module;
Step 7：Business information selecting module is according to message and mode control information selection outgoing message information or 600bps languages
Sound coding information, message information are admitted to display control software, and 600bps vocoded informations are admitted to 600bps acoustic codeizations volume
Decoder is to revert to analog voice.
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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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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