CN105959036A - Software controlled short-wave radio station automatic spectrum spreading system and automatic frequency spreading method thereof - Google Patents
Software controlled short-wave radio station automatic spectrum spreading system and automatic frequency spreading method thereof Download PDFInfo
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- CN105959036A CN105959036A CN201610238964.9A CN201610238964A CN105959036A CN 105959036 A CN105959036 A CN 105959036A CN 201610238964 A CN201610238964 A CN 201610238964A CN 105959036 A CN105959036 A CN 105959036A
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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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Abstract
The invention discloses a software controlled short-wave radio station adaptive frequency spreading system and an adaptive frequency spreading method. The system comprises a plurality of short-wave radio stations. Each short-wave radio station is provided with a PC and an anti-interference module which are in communication connection with the short-wave radio station. Display control software is operated on each PC. Information wave channel spectrum is shared between the short-wave radio station as the transmitting end and the short-wave radio station as the receiving end. The spectrum is provided with a plurality of preset different frequency wave channels. According to the software controlled short-wave radio station adaptive frequency spreading system, existing radio stations which are equipped by the user are utilized, and adaptive spectrum spreading is realized through adding the anti-interference processing module and setting the software.
Description
Technical field
The present invention relates to New Technology Of Shortwave Communication field, particularly relate to short-wave radio set adaptive spread spectrum system and adaptive spread spectrum method thereof that a kind of software controls.
Background technology
Short wave communication is the most always in occupation of critical role.Short wave communication indomitable vitality in the field of communications mainly has benefited from some advantages that it is intrinsic.Compared with the means of communication such as satellite communication, terrestrial microwave, coaxial cable, optical cable, short wave communication need not to set up relay station can realize telecommunication, thus builds and maintenance cost is low, and the construction period is short, and equipment is simple.Can according to requirements be fixedly installed, carry out pinpointing fixed communication, it is also possible to bear or load in vehicle, naval vessel, aircraft and move communication；Circuit allocation is easy, and interim networking is convenient, rapid, has the biggest use motility；Strong to the capability to resist destruction of natural disaster or war；Communication equipment volume is little, the most hidden, it is simple to change operating frequency, to hide enemy's interference and eavesdropping, is easily recovered after destruction.Under the state of war, the safety reliability of short wave communication is higher than satellite communication, and therefore military research tissue in various countries' attaches great importance to the research of New Technology Of Shortwave Communication.
It addition, in the use of short-wave radio set, generally there is the problem that communication distance is not enough and communications anti-jamming is poor.Sea requires to complete under complex electromagnetic environment the efficient communication of message and voice with land station；The efficient communication of voice more laid particular stress on by airborne station, it is desirable to radio station is simple to operate efficiently.
And, there is presently no and use software that the transmission of short-wave radio set information is carried out the technology of adaptive spread spectrum control, use software to control preferably control spread spectrum, the beneficially transmission of signal.
Summary of the invention
For solving the problems referred to above, the invention provides the short-wave radio set adaptive spread spectrum system that a kind of software controls, comprising some short-wave radio sets, each short-wave radio set is all correspondingly arranged on PC and the immunity module communicating with connection, each PC runs and has display to control software；As the short-wave radio set of transmitting terminal and as sharing information radio frequency channel frequency spectrum between the short-wave radio set of receiving terminal, this frequency spectrum has several the different airspaces pre-set.
Described display controls software and is used for immunity module sending station guidance command information, message and mode control information, and adjusts message and mode control information according to the channel condition information of immunity module feedback, and shows control process；Described radio station guidance command information is for controlling the airspace selection of the switching of short-wave radio set transmitting-receiving, business information, and the spread spectrum mode of described message and mode control information type selecting and business information for controlling business information in immunity module selects.
Immunity module carries out anti-interference process for the information receiving short-wave radio set or sending, and it includes hardware components and software section, and wherein hardware components is configured to:
Audio-frequency transformer and audio frequency amplifier, active low-pass filter, the first audio A GC, audio frequency amplifier, ADC are connected to the input of FPGA after being sequentially connected with, the outfan of FPGA is sequentially connected with DAC, active low-pass filter, the second audio A GC, audio-frequency transformer；First audio A GC and the second audio A GC full duplex connect, and junction point is connected with FPGA.
DSP/RAM with FPGA full duplex is connected, and DSP/RAM is connected with memorizer, 600bps acoustic code codec full duplex respectively, and DSP/RAM is provided with data communication interface and radio station controls interface.
600bps acoustic code codec for being converted into digital voice data or vocoded data being converted into analog voice by analog voice.
DAC is for the modulated signal being converted in tonal range by the signal after MSK orthogonal modulation.
ADC is for being converted into digital voice data by audio signal.
The active low-pass filter that is sequentially connected with, the second audio A GC, audio-frequency transformer are for processing accordingly modulated signal, and the audio signal after described audio-frequency transformer will process is sent to short-wave radio set.
Software section is configured to:
Module, information coding is selected to select module with interleaving block, spread processing module, framing module, frequency conversion with filtration module, channel estimation and equalization module, synchronization acquistion module, despreading module, deinterleaving and channel decoding module, business information including business information.
Business information selects module to encode and interleaving block for the data received being transferred to information with the form of audio signal or message information according to message and mode control information, and the information after deinterleaving, decoding is transferred out by audio signal or message information.
Information coding selects module with interleaving block for business information selects the output data of module send into spread spectrum mode after carrying out channel code and interleaving.
Spread spectrum mode selects processing module data message after interweaving according to message and mode control information to carry out high disposal gain spread processing or reduction process gain spread processing, and the data after processing send into framing module.
Framing module is for combining formation Frame by the data after spread processing and message and mode control information, frame synchronization head, training sequence.
MSK modulation module sends into DAC after Frame carries out MSK adjustment.
Frequency conversion and filtration module for carrying out frequency conversion and filtering to Frame, and exports to channel estimation and equalization module.
Channel estimation and equalization module carries out the assessment of channel status (channel estimating passes through training sequence calculating and accepts the signal to noise ratio of signal) according to training sequence, being sent in PC by channel condition information (accepting Signal-to-Noise), PC adjusts message and mode control information, infomational message and mode control information according to channel condition information.
Synchronization acquistion module is used for using related operation, the synchronization of complete paired data frame synchronization head and capture.
Despreading module for carrying out reduction process gain despreading or high disposal gain despreading according to the message in data-frame sync head and mode control information to data message.
Deinterleaving and channel decoding module is for being deinterleaved and channel decoding the data message in Frame, the information after decoding is transferred to business information and selects module.
Further, 600bps acoustic code codec is provided with microphone input interface, speaker output interface.
The adaptive spread spectrum method of above-mentioned system comprises the steps:
Step one: as the short-wave radio set of transmitting terminal and share information radio frequency channel frequency spectrum as making an appointment between the short-wave radio set of receiving terminal, described information radio frequency channel frequency spectrum has several different frequencies, respectively fi、fi+1、……fi+N, N is integer.
Step 2: using the short-wave radio set that is ready for sending information as transmitting terminal, prepares the short-wave radio set of reception information as receiving terminal, performs following flow process respectively:
The workflow of transmitting terminal is:
Step 1: display controls software and carries out the setting of message and mode control information according to channel situation.
Step 2: display controls software and radio station guidance command information, message and mode control information are simultaneously communicating to immunity module.
Step 3: business information selects module to select to information coding and interleaving block outgoing message information or 600bps vocoded information according to message and mode control information.
Step 4: the information that transmission is come by channel code and interleaving module carries out channel code and interleaving process, spread processing module is sent in the input after process.
Step 5: spread processing module carries out high-gain spread spectrum mode process or low gain spread processing mode treatment according to message and mode control information to data, and the information after processing is sent to framing module.
Step 6: clip information, message and the mode control information after spread spectrum and frame synchronization head are grouped together into Frame by framing module.
Step 7: Frame is transformed into simulated audio signal through MSK modulation and DAC.
Step 8: described simulated audio signal controls through tone filter, AGC gain and is sent to short-wave radio set after the relevant treatment of audio-frequency transformer.
Step 9: certain channel frequency that simulated audio signal is upconverted in information radio frequency channel frequency spectrum by short-wave radio set is transmitted.
The workflow of receiving terminal is:
The audio frequency that short-wave radio set is received by step 1:ADC is sampled, and is converted into digital audio and video signals, is transferred to frequency conversion and filtration module.
Step 2: after frequency conversion and filtration module carry out relevant treatment to digital audio and video signals, be transmitted to channel estimation and equalization module.
Step 3: channel estimation and equalization module is calculated channel condition information, channel condition information is sent to PC, and PC adjusts spread processing mode according to the status information of channel.Being achieved in that of this adjustment changes message and the character string of mode control information.
Step 4: synchronization acquistion module uses related operation, completes the synchronization to frame synchronization head and capture, determines despreading mode and business information type.
Step 5: despreading module carries out spread processing according to the despreading pattern determined and business information type to information.
Step 6: deinterleave and channel decoding module is deinterleaved and is sent to after channel decoding business information to the information after despreading and selects module.
Step 7: business information selects module to select outgoing message information or 600bps vocoded information according to message and mode control information, message information is admitted to display and controls software, and 600bps vocoded information is admitted to 600bps acoustic code codec to revert to analog voice.
Further, the serial data of radio station guidance command information includes start bit, the data bit comprising remote information, check bit, end position；The serial data of message and mode control information includes start bit, comprises message content information and the data bit of spread spectrum mode information, check bit, stop bits；The check bit of radio station guidance command information is different from the check bit of message and mode control information.
Further, the data bit of message and mode control information is the pseudo-random sequence of the 16bit that two groups of cross correlations are low.
The invention have the benefit that
The present invention utilizes the existing radio station of subscriber's installation, achieves adaptive spread spectrum by increasing the setting of anti-interference process module and software.Through test, in signal to noise ratio less than-13dB(Multi-tone jamming) under following short wave communication channel condition, owing to have employed immunity module, thus effectively overcome the shortwave interference such as signal to noise ratio is extremely low, the decline of signal, multipath, and then may be implemented in the signal to noise ratio information transmission less than extremely low speed under conditions of-13dB (Multi-tone jamming) (general speed 70～100bps).When channel condition is preferable, 600bps voice communication can be realized, so can guarantee that the connectedness of Shortwave Communication System, it is achieved the timely reception and registration of important information.
Accompanying drawing explanation
Fig. 1 is the data format chart of radio station guidance command information, message and mode control information.
Fig. 2 is the hardware architecture diagram of immunity module.
Fig. 3 is the flow chart of data processing schematic diagram in immunity module.
Detailed description of the invention
The design concept of the present invention is: designing adaptive spread spectrum technology based on software, core is automatic according to channel situation system or user manually changes spread spectrum mode, changes spreading gain with this.When bad channel quality or electromagnetic environment complexity, use reduction process gain spread spectrum mode (tamed spread spectrum adds repeated encoding, the most only supports the message information of user)；When channel quality is good, high disposal gain spread spectrum mode (only tamed spread spectrum is the most both supported to transmit message information and also supported voice messaging) is used.A kind of immunity module of design, this module can be in real time to software feedback channel basic condition, it is achieved adaptive spread spectrum.
System of the present invention includes some short-wave radio sets, and each short-wave radio set is all correspondingly arranged on PC and the immunity module communicating with connection.Run on each PC and have display to control software.As the short-wave radio set of transmitting terminal and as sharing information radio frequency channel frequency spectrum between the short-wave radio set of receiving terminal, this frequency spectrum has the N number of different airspace pre-set, and for convenience of distinguishing, is numbered f respectivelyi、fi+1、……fi+N, N is integer.Below display is controlled software and immunity module is introduced respectively.
One. display controls software
Described display controls software and is used for immunity module sending station guidance command information, message and mode control information, and adjusts message and mode control information according to the channel condition information of immunity module feedback, and shows control process.Described radio station guidance 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 spread spectrum mode of described message and mode control information type selecting and business information for controlling business information in immunity module selects.
The data form of radio station guidance command information, message and mode control information is as shown in Figure 1.
The character string of radio station guidance command information includes start bit, the data bit comprising remote information, check bit, end position.The character string of message and mode control information includes start bit, comprises spread spectrum mode information (2 characters) and the data bit of message content information (14 characters), check bit, stop bits.
The check bit of radio station guidance command information is different from the check bit of message and mode control information.In the present embodiment, when check bit is 1, represent that transmitting data is guidance command information.When check bit is 0, represent that transmitting data is message and mode control information and message information.
Message and mode control information are the pseudo-random sequence of the 16bit that two groups of cross correlations are low, two groups of sequences distinguish the spread processing of different mode, major control spread spectrum way choice and the type selecting of business information, and by framing module loading to (taking the 16bit that frame synchronization head is last) in frame synchronization head.
In the present embodiment, business information is divided into message information and audio signal two kinds.Spread spectrum mode is divided into reduction process gain spread spectrum mode and high disposal gain spread spectrum mode two kinds.When bad channel quality or electromagnetic environment complexity, use reduction process gain spread spectrum mode (tamed spread spectrum adds repeated encoding, the most only supports the message information of user)；When channel quality is good, high disposal gain spread spectrum mode (only tamed spread spectrum is the most both supported to transmit message information and also supported audio signal) is used.
Two. immunity module
Information for receiving short-wave radio set or sending carries out anti-interference process, including hardware components and software section.
As in figure 2 it is shown, hardware components is configured to:
Audio-frequency transformer and audio frequency amplifier, active low-pass filter, the first audio A GC, audio frequency amplifier, ADC are connected to the input of FPGA after being sequentially connected with, the outfan of FPGA is sequentially connected with DAC, active low-pass filter, the second audio A GC, audio-frequency transformer, and described audio-frequency transformer has audio frequency output.First audio A GC and the second audio A GC full duplex connect, and junction point is connected with FPGA.
DSP/RAM with FPGA full duplex is connected.DSP/RAM is connected with memorizer, 600bps acoustic code codec full duplex respectively, and DSP/RAM is provided with data communication interface, radio station controls interface.600bps acoustic code codec is provided with microphone input interface, speaker output interface.
600bps acoustic code codec for being converted into digital voice data or vocoded data being converted into analog voice by analog voice.
DAC is for the modulated signal being converted in tonal range by the signal after MSK orthogonal modulation；
ADC is for being converted into digital voice data by audio signal.
The active low-pass filter that is sequentially connected with, the second audio A GC, audio-frequency transformer are for processing accordingly modulated signal, and the audio signal after described audio-frequency transformer will process is sent to short-wave radio set.
As it is shown on figure 3, being designed as of software section:
Module, information coding is selected to select module with interleaving block, spread processing module, framing module, frequency conversion with filtration module, channel estimation and equalization module, synchronization acquistion module, despreading module, deinterleaving and channel decoding module, business information including business information.
Business information selects the function of module to have two: 1. the data received encoded and interleaving block for transmission to information with the form of audio signal or message information according to infomational message and mode control information.2. according to infomational message and mode control information, the information after deinterleaving, decoding is transferred out by audio signal or message information.In the present embodiment, message and mode control information generally PC sends, but does not the most hinder message and mode control information can be produced by inside modules.Receive audio signal to be come by 600bps acoustic code codec transmission.
Information coding selects module with interleaving block for business information selects the output data of module send into spread spectrum mode after carrying out channel code and interleaving.
Spread spectrum mode selects processing module data message after interweaving according to message and mode control information to carry out high disposal gain spread processing or reduction process gain spread processing, and the data message after spread processing is sent into framing module.
Framing module is for being grouped together into Frame by the data message after spread processing and message and mode control information, frame synchronization head.
MSK modulation module sends into DAC module after Frame carries out MSK adjustment.
Frequency conversion and filtration module for carrying out frequency conversion and filtering to Frame, and exports to channel estimation and equalization module.
Channel estimation and equalization module carries out the assessment of channel status (channel estimating passes through training sequence calculating and accepts the signal to noise ratio of signal) according to training sequence, being sent in PC by channel condition information (accepting Signal-to-Noise), PC adjusts message and mode control information, infomational message and mode control information according to channel condition information.
Synchronization acquistion module is used for using related operation, the synchronization of complete paired data frame synchronization head and capture, determines despreading mode and business information type.
Despreading module for carrying out reduction process gain despreading or high disposal gain despreading according to the message in data-frame sync head and mode control information to the data message in Frame.
Deinterleaving and channel decoding module is for being deinterleaved and channel decoding the data message in Frame, the information after decoding is transferred to business information and selects module.
The working mechanism of immunity module function of short-wave radio set belonging to it is relevant.When short-wave radio set belonging to it is transmitting terminal, the message that simulated voice is converted the digital voice data obtained or exterior PC feeding by 600bps acoustic code codec is carried out spreading and Error Correction of Coding by antijam communication module, then the data after coding are generated the modulated signal in tonal range by MSK orthogonal modulation and DAC conversion, and pass through active power filtering, AGC gain controls to process with audio-frequency transformer etc., audio signal after finally processing is sent to common short-wave radio set by radio station audio interface, common short-wave radio set is utilized to up-convert the signals on certain short wave channel and send.When short-wave radio set belonging to it is receiving terminal, common short-wave radio set receives signal from corresponding short wave channel, and down coversion returns to voice band, then the audio output interface from radio station sends into antijam communication module, antijam communication module demodulates, by MSK quadrature demodulation, the information carried from audio signal, it is then fed into communication codec these data are de-spread and correction process, finally recovers message data or vocoded data.Message sends into PC by serial ports, and vocoded data is sent directly into the 600bps acoustic code codec of immunity module can recover analog voice.
Below the adaptive spread spectrum method of said system is illustrated.
Step one: as the short-wave radio set of transmitting terminal and as sharing information radio frequency channel frequency spectrum between the short-wave radio set of receiving terminal, described information radio frequency channel frequency spectrum has several different frequencies, respectively fi、fi+1、……fi+N, N is integer.
Step 2: using the short-wave radio set that is ready for sending information as transmitting terminal, prepares the short-wave radio set of reception information as receiving terminal.
Wherein, the workflow of transmitting terminal is:
Step 1: display controls software and carries out the setting of message and mode control information according to channel situation.
Step 2: display controls software and radio station guidance command information, message and mode control information are simultaneously communicating to immunity module.
Step 3: business information selects module to select to information coding and interleaving block outgoing message information or 600bps vocoded information according to message and mode control information.
Step 4: the information that transmission is come by channel code and interleaving module carries out channel code and interleaving process, spread processing module is sent in the input after process.
Step 5: spread processing module carries out the spread processing mode treatment of high disposal gain spread spectrum mode or low gain according to message and mode control information to data, and the information after processing is sent to framing module.
Step 6: clip information, message and the mode control information after spread spectrum and frame synchronization head are grouped together into Frame by framing module.
Step 7: Frame is transformed into simulated audio signal through MSK modulation and DAC.
Step 8: described simulated audio signal controls through tone filter, AGC gain and is sent to short-wave radio set after the relevant treatment of audio-frequency transformer.
Step 9: certain channel frequency that simulated audio signal is upconverted in information radio frequency channel frequency spectrum by short-wave radio set is transmitted.
The workflow of receiving terminal is:
The audio frequency that short-wave radio set is received by step 1:ADC is sampled, and is converted into digital audio and video signals, is transferred to frequency conversion and filtration module.
Step 2: after frequency conversion and filtration module carry out relevant treatment to digital audio and video signals, be transmitted to channel estimation and equalization module.
Step 3: channel estimation and equalization module is calculated channel condition information, channel condition information is sent to PC, and the display of PC controls software and adjusts spread processing mode according to the status information of channel.
Step 4: synchronization acquistion module uses related operation, completes the synchronization to frame synchronization head and capture, determines despreading mode and business information type.
Step 5: despreading module carries out spread processing according to the despreading pattern determined and business information type to information.
Step 6: deinterleave and channel decoding module is deinterleaved and is sent to after channel decoding business information to the information after despreading and selects module.
Step 7: business information selects module to select outgoing message information or 600bps vocoded information according to message and mode control information, when for message information, directly send into display by serial ports control software, when for 600bps vocoded information, be sent directly into Voice decoder recover analog voice.
Claims (5)
1. the short-wave radio set adaptive spread spectrum system that a software controls, it is characterised in that comprising some short-wave radio sets, each short-wave radio set is all correspondingly arranged on PC and the immunity module communicating with connection, each PC runs and has display to control software；As the short-wave radio set of transmitting terminal and as sharing information radio frequency channel frequency spectrum between the short-wave radio set of receiving terminal, this frequency spectrum has several the different airspaces pre-set.
Described display controls software for immunity module sending station guidance command information, message and mode control information, adjusting message and mode control information according to the channel condition information of immunity module feedback, and show adaptive spread spectrum control process；Described radio station guidance command information is for controlling the airspace selection of the switching of short-wave radio set transmitting-receiving, business information, and the spread spectrum mode of described message and mode control information type selecting and business information for controlling business information in immunity module selects.
Immunity module carries out anti-interference process for the information receiving short-wave radio set or sending, and it includes hardware components and software section, and wherein hardware components is configured to:
Audio-frequency transformer and audio frequency amplifier, active low-pass filter, the first audio A GC, audio frequency amplifier, ADC are connected to the input of FPGA after being sequentially connected with, the outfan of FPGA is sequentially connected with DAC, active low-pass filter, the second audio A GC, audio-frequency transformer；First audio A GC and the second audio A GC full duplex connect, and junction point is connected with FPGA；
DSP/RAM with FPGA full duplex is connected, and DSP/RAM is connected with memorizer, 600bps acoustic code codec full duplex respectively, and DSP/RAM is provided with data communication interface and radio station controls interface；
600bps acoustic code codec for being converted into digital voice data or vocoded data being converted into analog voice by analog voice；
DAC is for the modulated signal being converted in tonal range by the signal after MSK orthogonal modulation；
ADC is for being converted into digital voice data by audio signal；
The active low-pass filter that is sequentially connected with, the second audio A GC, audio-frequency transformer are for processing accordingly modulated signal, and the audio signal after described audio-frequency transformer will process is sent to short-wave radio set；
Software section is configured to:
Module, information coding is selected to select module with interleaving block, spread processing module, framing module, frequency conversion with filtration module, channel estimation and equalization module, synchronization acquistion module, despreading module, deinterleaving and channel decoding module, business information including business information；
Business information selects module to encode and interleaving block for the data received being transferred to information with the form of audio signal or message information according to message and mode control information, and the information after deinterleaving, decoding is transferred out by audio signal or message information；
Information coding selects module with interleaving block for business information selects the output data of module send into spread spectrum mode after carrying out channel code and interleaving；
Spread spectrum mode selects processing module data message after interweaving according to message and mode control information to carry out high disposal gain spread processing or reduction process gain spread processing, and the data after processing send into framing module；
Framing module is for combining formation Frame by the data after spread processing and message and mode control information, frame synchronization head, training sequence；
MSK modulation module sends into DAC after Frame carries out MSK adjustment；
Frequency conversion and filtration module for carrying out frequency conversion and filtering to Frame, and exports to channel estimation and equalization module；
Channel estimation and equalization module carries out the assessment of channel status according to training sequence, is sent in PC by channel condition information, and PC adjusts message and mode control information according to channel condition information；
Synchronization acquistion module is used for using related operation, the synchronization of complete paired data frame synchronization head and capture；
Despreading module for carrying out reduction process gain despreading or high disposal gain despreading according to the message in data-frame sync head and mode control information to data message；
Deinterleaving and channel decoding module is for being deinterleaved and channel decoding the data message in Frame, the information after decoding is transferred to business information and selects module.
2. the short-wave radio set adaptive spread spectrum system that software as claimed in claim 1 controls, it is characterised in that 600bps acoustic code codec is provided with microphone input interface, speaker output interface.
3. the adaptive spread spectrum method of the short-wave radio set adaptive spread spectrum system that software as claimed in claim 1 controls, it is characterised in that comprise the steps:
Step one: as the short-wave radio set of transmitting terminal and as the information radio frequency channel frequency spectrum shared of making an appointment between the short-wave radio set of receiving terminal, described information radio frequency channel frequency spectrum has several different frequencies, respectively fi、fi+1、……fi+N, N is integer；
Step 2: using the short-wave radio set that is ready for sending information as transmitting terminal, prepares the short-wave radio set of reception information as receiving terminal, performs following flow process respectively:
The workflow of transmitting terminal is:
Step 1: display controls software and carries out the setting of message and mode control information according to channel situation；
Step 2: display controls software and radio station guidance command information, message and mode control information are simultaneously communicating to immunity module；
Step 3: business information selects module to select to information coding and interleaving block outgoing message information or 600bps vocoded information according to message and mode control information;
Step 4: the information that transmission is come by channel code and interleaving module carries out channel code and interleaving process, spread processing module is sent in the input after process；
Step 5: spread processing module carries out high-gain spread spectrum mode process or low gain spread processing mode treatment according to message and mode control information to data, and the information after processing is sent to framing module;
Step 6: clip information, message and the mode control information after spread spectrum and frame synchronization head are grouped together into Frame by framing module；
Step 7: Frame is transformed into simulated audio signal through MSK modulation and DAC；
Step 8: described simulated audio signal controls through tone filter, AGC gain and is sent to short-wave radio set after the relevant treatment of audio-frequency transformer;
Step 9: certain channel frequency that simulated audio signal is upconverted in information radio frequency channel frequency spectrum by short-wave radio set is transmitted；
The workflow of receiving terminal is:
The audio frequency that short-wave radio set is received by step 1:ADC is sampled, and is converted into digital audio and video signals, is transferred to frequency conversion and filtration module；
Step 2: after frequency conversion and filtration module carry out relevant treatment to digital audio and video signals, be transmitted to channel estimation and equalization module；
Step 3: channel estimation and equalization module is calculated channel condition information, channel condition information is sent to PC device, and the display of PC controls software and adjusts spread processing mode according to the status information of channel；
Step 4: synchronization acquistion module uses related operation, completes the synchronization to frame synchronization head and capture, determines despreading mode and business information type；
Step 5: despreading module carries out spread processing according to the despreading pattern determined and business information type to information；
Step 6: deinterleave and channel decoding module is deinterleaved and is sent to after channel decoding business information to the information after despreading and selects module;
Step 7: business information selects module to select outgoing message information or 600bps vocoded information according to message and mode control information, message information is admitted to display and controls software, and 600bps vocoded information is admitted to 600bps acoustic code codec to revert to analog voice.
4. the short-wave radio set adaptive spread spectrum system that software as claimed in claim 3 controls, it is characterised in that the serial data of radio station guidance command information includes start bit, the data bit comprising remote information, check bit, end position；The serial data of message and mode control information includes start bit, comprises message content information and the data bit of spread spectrum mode information, check bit, stop bits；The check bit of radio station guidance command information is different from the check bit of message and mode control information.
5. the short-wave radio set adaptive spread spectrum system that software as claimed in claim 1 controls, it is characterised in that the data bit of message and mode control information is the pseudo-random sequence of two groups of 16bit.
Priority Applications (1)
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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 |
| US20120171965A1 (en) * | 2010-12-31 | 2012-07-05 | Chu-Ping Shen | Anti-Interference and Anti-Piracy Methods For Improving Stability of RF Signals for Two-Way Remote Control System |
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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 |
| US20120171965A1 (en) * | 2010-12-31 | 2012-07-05 | Chu-Ping Shen | Anti-Interference and Anti-Piracy Methods For Improving Stability of RF Signals for Two-Way Remote Control System |
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| GB2565386B (en) * | 2017-08-11 | 2021-12-01 | Commerzbank Ag | Ultra-low-latency communications |
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