CN110048740A - A kind of spectrum spread communication method and system - Google Patents
A kind of spectrum spread communication method and system Download PDFInfo
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- CN110048740A CN110048740A CN201910430526.6A CN201910430526A CN110048740A CN 110048740 A CN110048740 A CN 110048740A CN 201910430526 A CN201910430526 A CN 201910430526A CN 110048740 A CN110048740 A CN 110048740A
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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
-
- 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
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/7097—Direct sequence modulation interference
Abstract
The embodiment of the present invention provides a kind of spectrum spread communication method and system.Wherein, method is included: and is modulated original source signal into multiple pure frequency ranges respectively based on frequency spectrum perception technology, obtains corresponding multiple modulated signals, wherein the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；The multiple modulated signal is combined, receiver is sent to after obtaining combining signal, so that the receiver obtains target information source signal based on the combining signal received.Method and system provided in an embodiment of the present invention, transmitter is by being based on frequency spectrum perception technology, original source signal is modulated respectively to multiple modulated signals obtained in each pure frequency range to be combined and is sent, under the application background of current continuous pure resource of frequency range anxiety, the pure frequency range of segment can be made full use of to be communicated, so that the interference signal intensity being mixed in the signal that receiver receives is smaller, demodulation, the reduction accuracy of receiver are improved.
Description
Technical field
The present invention relates to spread spectrum technic field more particularly to a kind of spectrum spread communication method and systems.
Background technique
As the important component of national basis communications facility and global mobile communication, satellite communication is pacified in country
Entirely, emergency relief, satellite broadcasting television and personal mobile communications etc. are widely applied.Weight as satellite communication
Means are wanted, Low-Orbit Satellite Communication system has track diversification, passes for traditional high orbit satellite communication system
Advantages that defeated delay is short, inter-satellite link is high-quality, terminal miniaturization and production cost are low etc. can be realized wide area covering and full-time
Communication.
In Low-Orbit Satellite Communication system, in order to realize the accurate reception of signal, receiver will not only overcome many and diverse
The characteristic of channel will also cope with the interference of service communication signal bring and the high relative motion speed bring Doppler effect of low orbit satellite
It answers, this is undoubtedly the multiple test to receiver ability of anti-multipath, anti-interference ability and anti-Doppler ability.
Direct Sequence Spread Spectrum (Direct Sequence Spread Spectrum, abbreviation DSSS) has inherent
Ability of anti-multipath and anti-Doppler ability, while the important means as solution in frequency domain are compared to adaptive nulling antenna
Main airspace Anti-Jamming Technique and the time domain Anti-Jamming Technique based on adaptive time-varying processing technique had both eliminated complicated resist
Algorithm of interference design avoids the loss of trap bring receiver performance, also not dependent on antenna manufacture level, it is theoretical mature and
It is easily achieved, thus becomes jamproof conventional means in Low-Orbit Satellite Communication system.
For the Low-Orbit Satellite Communication system based on DSSS, transmitter usually modulates source signal to L/S frequency range
Modulated signal is obtained in a certain frequency sub-band, and the modulated signal is directly transmitted.And have problems in that at this time: if should
Interference signal intensity in frequency sub-band is excessive, then the excessive interference signal of intensity is mixed in the signal that receiver receives, so that
Receiver signal is demodulated, is restored etc. the signal that processing obtain differed with source signal greatly cause receiver demodulation,
It is extremely low to restore accuracy.
Summary of the invention
In order to solve defect existing in the prior art, the embodiment of the present invention provides a kind of spectrum spread communication method and system.
In a first aspect, the embodiment of the present invention provides a kind of spectrum spread communication method, comprising:
Based on frequency spectrum perception technology, original source signal is modulated respectively into multiple pure frequency ranges, is obtained corresponding more
A modulated signal, wherein the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；
The multiple modulated signal is combined, receiver is sent to after obtaining combining signal, so that the reception
Machine obtains target information source signal based on the combining signal received.
Second aspect, the embodiment of the present invention provide a kind of spectrum spread communication method, comprising:
The combining signal that receiver/transmitter is sent, wherein the combining signal is that the transmitter is based on frequency spectrum perception skill
Art modulates original source signal respectively into multiple pure frequency ranges, obtains corresponding multiple modulated signals and by the multiple tune
What signal processed was combined, the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；
Based on the combining signal, target information source signal is obtained.
The third aspect, the embodiment of the present invention provide a kind of spread spectrum communication system, comprising:
Modulation module, for based on frequency spectrum perception technology, original source signal to be modulated respectively into multiple pure frequency ranges,
Obtain corresponding multiple modulated signals, wherein the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；
Sending module is sent to receiver after obtaining combining signal for the multiple modulated signal to be combined, with
So that the receiver obtains target information source signal based on the combining signal received.
Fourth aspect, the embodiment of the present invention provide a kind of spread spectrum communication system, comprising:
Receiving module, the combining signal sent for receiver/transmitter, wherein the combining signal is the transmitter base
Original source signal is modulated respectively into multiple pure frequency ranges in frequency spectrum perception technology, obtains corresponding multiple modulated signals simultaneously
The multiple modulated signal is combined, the pure frequency range is the frequency that interference signal intensity is less than preset threshold
Section；
Recovery module obtains target information source signal for being based on the combining signal.
5th aspect, the embodiment of the present invention provides a kind of electronic equipment, including memory, processor and is stored in memory
Computer program that is upper and can running on a processor, the processor realize such as first aspect or second when executing described program
Provided by aspect the step of method.
6th aspect, the embodiment of the present invention provide a kind of non-transient computer readable storage medium, are stored thereon with calculating
Machine program, when which is executed by processor the step of realization method as provided by first aspect or second aspect.
A kind of spectrum spread communication method provided in an embodiment of the present invention and system, transmitter by be based on frequency spectrum perception technology,
Original source signal is modulated respectively to multiple modulated signals obtained in each pure frequency range to be combined and is sent, current continuous pure
Under the application background of resource of frequency range anxiety, the pure frequency range of segment can be made full use of to be communicated, so that receiver received
The interference signal intensity being mixed in signal is smaller, so that receiver is demodulated to signal, restored etc. what processing obtained
Signal (target information source signal) differs minimum with original source signal, improves demodulation, the reduction accuracy of receiver.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of spectrum spread communication method flow chart that one embodiment of the invention provides；
Fig. 2 be another embodiment of the present invention provides a kind of spectrum spread communication method flow chart；
Fig. 3 is a kind of structural schematic diagram for spread spectrum communication system that one embodiment of the invention provides；
Fig. 4 be another embodiment of the present invention provides a kind of spread spectrum communication system structural schematic diagram；
Fig. 5 is the entity structure schematic diagram of a kind of electronic equipment provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is a kind of spectrum spread communication method flow chart that one embodiment of the invention provides, and the executing subject of this method is hair
Machine is penetrated, as shown in Figure 1, this method comprises:
Step 101, it is based on frequency spectrum perception technology, original source signal is modulated respectively into multiple pure frequency ranges, is obtained
Corresponding multiple modulated signals, wherein the pure frequency range is the frequency range that interference signal intensity is less than preset threshold.
Specifically, spectrum spread communication method provided in an embodiment of the present invention can be applied in Low-Orbit Satellite Communication system, and
Specifically executed by the transmitter in the system.It should be noted that the system includes at least transmitter and receiver two
Component part, wherein the main task of transmitter are as follows: the useful low frequency signal (abbreviation original source signal) for generating information source
After being modulated to the frequency electromagnetic waves for being suitble to propagate in the sky, issued by the antenna of transmitter terminal；The main task of receiver are as follows:
Antenna based on receiver end receives frequency electromagnetic waves, and restores original source signal based on the frequency electromagnetic waves received.
Frequency spectrum perception technology is a key technology of cognitive radio (Cognitive Radio, CR), major function
Are as follows: by various signal detections and processing means, obtain the spectrum information of wireless network, wherein spectrum information may include: pure
The net number of frequency range, the bandwidth of each pure frequency range and center frequency point etc..Wherein, pure frequency range refers to that interference signal intensity is small
In the frequency range of preset threshold, preset threshold is usually smaller, can be set according to the actual situation, the embodiment of the present invention is to it
It is not especially limited.The bandwidth of pure frequency range refers to the frequency bandwidth that the frequency range occupies, what the center frequency point of pure frequency range referred to
It is the frequency size at the frequency range center.
Original source signal is modulated respectively into multiple pure frequency ranges, obtains corresponding multiple modulated signals, that is, if pure
Net frequency range has 2, and respectively pure frequency range A and pure frequency range B, then obtains original source signal modulation into pure frequency range A
To a corresponding modulated signal, and by original source signal modulation into pure frequency range B, corresponding modulation letter is obtained
Number.Wherein, by original source signal modulation into pure frequency range A, a corresponding modulated signal is obtained, that is, refers to, passes through tune
Technology processed, by the frequency spectrum shift of original source signal into pure frequency range A, so that the frequency of obtained modulated signal and pure frequency
The center frequency point of section A is close, and the bandwidth for making the bandwidth of the modulated signal be less than or equal to pure frequency range A.
Step 102, the multiple modulated signal is combined, is sent to receiver after obtaining combining signal, so that
The receiver obtains target information source signal based on the combining signal received.
Continue to be illustrated step 102 with above-mentioned example, that is, be combined 2 modulated signals, obtain combining signal
After be sent to receiver, it should be noted that combining refers to the multiple signals of input is combined into signal all the way by combiner
Output refers to that 2 modulated signals are combined into signal all the way is combined signal in embodiments of the present invention, then combining signal is led to
It crosses antenna and is sent to receiver.
It is understood that interference signal intensity is smaller in each pure frequency range, therefore, transmitter is by original source signal
It is modulated respectively to the combining of multiple modulated signals obtained in each pure frequency range after sending, is mixed in the signal that receiver receives
Interference signal intensity it is smaller so that receiver such as is demodulated to signal, is restored at signal (the target information source letter that processing obtain
Number) with original source signal differ minimum, improve demodulation, the reduction accuracy of receiver.
Spectrum spread communication method provided in an embodiment of the present invention, transmitter is by being based on frequency spectrum perception technology, by original source
Signal is modulated respectively to multiple modulated signals obtained in each pure frequency range to be combined and be sent, tight in the current continuous pure resource of frequency range
Under the application background opened, the pure frequency range of segment can be made full use of to be communicated, so that mixing in the signal that receiver receives
Some interference signal intensities are smaller, so that receiver such as is demodulated to signal, restored at signal (the target letter that processing obtain
Source signal) with original source signal differ minimum, improve demodulation, the reduction accuracy of receiver.
On the basis of the various embodiments described above, the embodiment of the present invention carries out furtherly the modulated process of source signal
It is bright, that is, to be based on frequency spectrum perception technology, original source signal is modulated respectively into multiple pure frequency ranges, is obtained corresponding multiple
Modulated signal, comprising:
Based on frequency spectrum perception technology, multiple pure band informations are obtained, wherein each pure band information includes described pure
Bandwidth, power and the center frequency point of net frequency range.
Specifically, frequency spectrum perception technology can be with are as follows: energy detection technique, matched filter detection technique or cyclo-stationary inspection
Survey technology etc. can be selected specifically according to the actual situation, is not especially limited herein.
Transmitter is based on frequency spectrum perception technology, the available spectrum information to wireless network, wherein spectrum information can be with
It include: number, bandwidth, power and the center frequency point of each pure frequency range etc. of pure frequency range.Herein, by pure frequency range
Bandwidth, power and center frequency point are known as a pure band information, to obtain multiple pure band informations.It needs to illustrate
It is that above-described embodiment is illustrated the definition of the bandwidth and center frequency point of pure frequency range, pure frequency range, it is no longer superfluous herein
It states.
For each pure band information, the original source signal is modulated by the pure band information,
Obtain modulated signal corresponding with the pure band information.
Specifically, if the pure band information got is 2, it is assumed that be respectively the pure band information a of pure frequency range A
Then primary modulation is carried out to original source signal by pure band information a, is obtained with the pure band information b of pure frequency range B
Primary modulation is carried out to original source signal to corresponding modulated signal, and by pure band information b, obtains corresponding modulation
Signal.
It obtains and the multiple pure band information multiple modulated signals correspondingly.
For above-mentioned example, can be obtained and 2 pure one-to-one 2 modulated signals of band information.
On the basis of the various embodiments described above, the embodiment of the present invention carries out the progress of primary modulation process to original source signal
It further illustrates, that is, the original source signal is modulated by the pure band information, is obtained and the pure frequency
The corresponding modulated signal of segment information, comprising:
By the bandwidth in the pure band information, spread code length, and the spreading code pair based on the length are determined
The original source signal is spread, and spread-spectrum signal is obtained.
Specifically, to carry out primary modulation to original source signal by pure band information a, corresponding modulation letter is obtained
It number is illustrated, it is assumed that bandwidth is 5MHz in pure band information a, and center frequency point 1500MHz then passes through bandwidth
5MHz determines that spread code length, formula are as follows:
B=(1+a) * spread code length * Rs, wherein B be bandwidth 5MHz, a be forming coefficients, Rs is signal rate.
Spreading code based on the length spreads original source signal, obtains spread-spectrum signal.It should be noted that
Spread spectrum, which refers to, breaks up the frequency spectrum for transmitting signal compared with its original broader technology of bandwidth.
The spread-spectrum signal is subjected to digital-to-analogue conversion, obtains analog signal.
Based on the center frequency point and power in the pure band information, by the analog signal up-conversion to the center
At frequency point, modulated signal corresponding with the pure band information is obtained.
Specifically, it needs to illustrate then by analog signal up-conversion to 1500MHz for 1500MHz due to center frequency point
It is that up-conversion refers to change the input signal with certain frequency (not change usually at the output signal with higher frequency
The information content and modulation system of signal) technology.
On the basis of the various embodiments described above, the embodiment of the present invention carries out the progress of primary modulation process to original source signal
It further illustrates, that is, the spread-spectrum signal is subjected to digital-to-analogue conversion, before further include:
Molding filtration is carried out to the spread-spectrum signal, the spread-spectrum signal after obtaining molding filtration；Correspondingly, by the spread spectrum
Signal carries out digital-to-analogue conversion, obtains analog signal, comprising:
Spread-spectrum signal after the molding filtration is subjected to digital-to-analogue conversion, obtains analog signal.
Specifically, in embodiments of the present invention, primary modulation is carried out to original source signal are as follows: successively believe original source
It number is spread, molding filtration, digital-to-analogue conversion and up-conversion.
Wherein, molding filtration, which refers to, carries out band limit to transmission signal, makes the technology of its bandwidth match channel width.
Fig. 2 be another embodiment of the present invention provides a kind of spectrum spread communication method flow chart, the executing subject of this method is
Receiver, as shown in Fig. 2, this method comprises:
Step 201, the combining signal that receiver/transmitter is sent, wherein the combining signal is that the transmitter is based on frequency
Spectrum cognition technology modulates original source signal respectively into multiple pure frequency ranges, obtains corresponding multiple modulated signals and by institute
State what multiple modulated signals were combined, the pure frequency range is the frequency range that interference signal intensity is less than preset threshold.
Specifically, receiver receives the combining signal of transmitter transmission by antenna, and the source about combining signal is
It is described in detail in the above-described embodiments, details are not described herein again.
Step 202, it is based on the combining signal, obtains target information source signal.
Specifically, it after receiver receives combining signal, needs to restore original source signal, ideal situation based on this
Under, the signal that receiver finally restores should be consistent with original source signal, but since actual conditions are non-ideal feelings
Condition, therefore, in order to be distinguished with showing, the signal that receiver is finally restored is known as target information source signal.
Spectrum spread communication method provided in an embodiment of the present invention will be original since transmitter is by being based on frequency spectrum perception technology
Source signal is modulated respectively to multiple modulated signals obtained in each pure frequency range to be combined and be sent, in current continuous pure frequency range money
Under the application background of source anxiety, the pure frequency range of segment can be made full use of to be communicated, so that in the signal that receiver receives
The interference signal intensity being mixed with is smaller, so that receiver such as is demodulated to signal, restored at the signal (mesh that processing obtain
Mark source signal) differ minimum with original source signal, improve demodulation, the reduction accuracy of receiver.
On the basis of the various embodiments described above, the embodiment of the present invention carries out the process for obtaining target information source signal further
Explanation, that is, be based on the combining signal, obtain target information source signal, comprising:
The combining signal is converted into multiple function sub-signals.
Specifically, combining signal is converted into multiple function sub-signals by power divider, it should be noted that function point letter
Number number with combining signal in the number of modulated signal it is equal.
Each function sub-signal in the multiple function sub-signal is successively subjected to down coversion, analog-to-digital conversion, matched filtering, ginseng
Number rejects, is synchronous, despreading and demodulation, obtains and the multiple function sub-signal multiple demodulated signals correspondingly.
Specifically, the process for carrying out aforesaid operations to any one function sub-signal in multiple function sub-signals is illustrated:
Step 1, down coversion is carried out to function sub-signal, wherein the purpose of down coversion is the carrier wave in order to reduce function sub-signal
Frequency obtains down-conversion signal；
Step 2, down-conversion signal is subjected to analog-to-digital conversion, the down-conversion signal of simulation is converted into digital signal；
Step 3, digital signal is subjected to matched filtering, to filter out the high fdrequency component in digital signal, obtains matched filtering
Signal；
Step 4, matched filtering signal is subjected to parameter rejecting, that is, rejects the parameters such as the carrier frequency of the signal, obtains parameter and pick
Signal after removing；
Step 5, the carrier wave frequency deviation and code phase information of the signal after rough estimate parameter is rejected, according to aforementioned information to ginseng
Signal after number is rejected synchronizes, and obtains synchronization signal；
Step 6, despreading and demodulation is carried out to synchronization signal, that is, remove the spreading code in synchronization signal and expand removing
The signal of frequency code is demodulated, and demodulated signal is obtained.
Each function sub-signal in multiple function sub-signals is subjected to the operation in above-mentioned steps 1-6, multiple demodulation can be obtained
Signal.
The multiple demodulated signal is subjected to diversity merging, obtains merging signal.
Specifically, this multiple demodulated signal is subjected to diversity merging, obtains merging signal.It should be noted that point set
And best initial weights strategy is used, multiple demodulated signals are subjected to best initial weights merging, to improve received signal quality.
The merging signal is related to preset multiple candidate source signal progress, it obtains and the multiple candidate information source
Signal multiple correlated results correspondingly.
Specifically, multiple candidate source signals can be preset herein, it should be noted that this multiple candidate source signal is mutually not
Identical, it is related by correlator progresss to this multiple candidate source signal respectively to merge signal, available and this multiple candidate
Source signal multiple correlated results correspondingly.
In the multiple correlated results, the corresponding candidate source signal of largest correlation result is selected to believe as the target
Source signal.
Specifically, in embodiments of the present invention, by the corresponding candidate source signal of correlated results when correlated results maximum,
As target information source signal, target information source signal is most close to the original source signal of transmitter terminal at this time.
Fig. 3 is a kind of structural schematic diagram for spread spectrum communication system that one embodiment of the invention provides, and specifically, which is
Transmitter, as shown in figure 3, the system includes:
Modulation module 301 is modulated original source signal respectively to multiple pure frequency ranges for being based on frequency spectrum perception technology
In, obtain corresponding multiple modulated signals, wherein the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；
Sending module 302 is sent to receiver after obtaining combining signal for the multiple modulated signal to be combined, so that
The receiver obtains target information source signal based on the combining signal received.
System provided in an embodiment of the present invention, specifically executes above-mentioned each method embodiment process, please specifically be detailed in above-mentioned each
The content of embodiment of the method, details are not described herein again.System provided in an embodiment of the present invention, transmitter is by being based on frequency spectrum perception skill
Original source signal is modulated respectively to multiple modulated signals obtained in each pure frequency range and is combined transmission by art, current continuous
Under the application background of pure resource of frequency range anxiety, the pure frequency range of segment can be made full use of to be communicated, so that receiver receives
To signal in the interference signal intensity that is mixed with it is smaller so that receiver demodulates signal, is restored etc. and being handled
The signal (target information source signal) arrived differs minimum with original source signal, improves demodulation, the reduction accuracy of receiver.
Further, modulation module includes:
Information acquisition unit obtains multiple pure band informations, wherein each pure for being based on frequency spectrum perception technology
Band information includes bandwidth, power and the center frequency point of the pure frequency range；
Modulation unit is used for for each pure band information, by the pure band information to the original source
Signal is modulated, and obtains modulated signal corresponding with the pure band information；
Modulated signal acquiring unit is believed for obtaining with the one-to-one multiple modulation of the multiple pure band information
Number.
Further, modulation unit includes:
Subelement is spread, for determining spread code length by the bandwidth in the pure band information, and based on described
The spreading code of length spreads the original source signal, obtains spread-spectrum signal；
Digital-to-analogue conversion subunit obtains analog signal for the spread-spectrum signal to be carried out digital-to-analogue conversion；
Up-conversion subelement, for based on the center frequency point and power in the pure band information, the simulation to be believed
At number up-conversion to the center frequency point, modulated signal corresponding with the pure band information is obtained.
Further, further includes: molding filtration unit is formed for carrying out molding filtration to the spread-spectrum signal
Filtered spread-spectrum signal；Correspondingly, the digital-to-analogue conversion subunit is further used for:
Spread-spectrum signal after the molding filtration is subjected to digital-to-analogue conversion, obtains analog signal.
Fig. 4 be another embodiment of the present invention provides a kind of spread spectrum communication system structural schematic diagram, specifically, the system
For receiver, as shown in figure 4, the system includes:
Receiving module 401, the combining signal sent for receiver/transmitter, wherein the combining signal is the transmitting
Machine is based on frequency spectrum perception technology and modulates original source signal into multiple pure frequency ranges respectively, obtains corresponding multiple modulation letters
Number and the multiple modulated signal is combined, the pure frequency range is that interference signal intensity is less than preset threshold
Frequency range；Recovery module 402 obtains target information source signal for being based on the combining signal.
System provided in an embodiment of the present invention, specifically executes above-mentioned each method embodiment process, please specifically be detailed in above-mentioned each
The content of embodiment of the method, details are not described herein again.System provided in an embodiment of the present invention, since transmitter is by being based on frequency spectrum sense
Know technology, original source signal is modulated respectively to multiple modulated signals obtained in each pure frequency range and is combined transmission, current
Under the application background of continuous pure resource of frequency range anxiety, the pure frequency range of segment can be made full use of to be communicated, so that receiver
The interference signal intensity being mixed in the signal received is smaller, so that receiver demodulates signal, restores etc.
It manages obtained signal (target information source signal) and differs minimum with original source signal, demodulation, the reduction for improving receiver are accurate
Property.
Further, receiving module includes:
Conversion module, for the combining signal to be converted to multiple function sub-signals；
Demodulation module, for each function sub-signal in the multiple function sub-signal successively to be carried out down coversion, modulus turns
It changes, matched filtering, parameter rejecting, synchronous, despreading and demodulation, obtains and the multiple demodulation correspondingly of the multiple function sub-signal
Signal；
Diversity merging module obtains merging signal for the multiple demodulated signal to be carried out diversity merging；
Correlation module obtains and institute for the mergings signal is related to preset multiple candidate's source signal progress
State multiple candidate source signals multiple correlated results correspondingly；
Selecting module, in the multiple correlated results, selecting the corresponding candidate source signal of largest correlation result
As the target information source signal.
Fig. 5 is the entity structure schematic diagram of a kind of electronic equipment provided in an embodiment of the present invention, as shown in figure 5, the electronics
Equipment may include: processor (processor) 501, communication interface (Communications Interface) 502, storage
Device (memory) 503 and communication bus 504, wherein processor 501, communication interface 502, memory 503 pass through communication bus
504 complete mutual communication.Processor 501, which can call, to be stored on memory 503 and can run on processor 501
Computer program, the method to execute the various embodiments described above offer, for example, frequency spectrum perception technology is based on, by original source
Signal is modulated respectively into multiple pure frequency ranges, and corresponding multiple modulated signals are obtained, wherein the pure frequency range is interference letter
Number intensity is less than the frequency range of preset threshold；The multiple modulated signal is combined, is sent to reception after obtaining combining signal
Machine, so that the receiver obtains target information source signal based on the combining signal received.Alternatively, receiver/transmitter is sent out
The combining signal sent, wherein the combining signal is that the transmitter is distinguished original source signal based on frequency spectrum perception technology
Modulation obtains corresponding multiple modulated signals and is combined to obtain by the multiple modulated signal into multiple pure frequency ranges
, the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；Based on the combining signal, target information source is obtained
Signal.
In addition, the logical order in above-mentioned memory 503 can be realized by way of SFU software functional unit and conduct
Independent product when selling or using, can store in a computer readable storage medium.Based on this understanding, originally
The technical solution of the inventive embodiments substantially part of the part that contributes to existing technology or the technical solution in other words
It can be embodied in the form of software products, which is stored in a storage medium, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes the present invention respectively
The all or part of the steps of a embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk
Etc. the various media that can store program code.
The embodiment of the present invention also provides a kind of non-transient computer readable storage medium, is stored thereon with computer program,
The computer program is implemented to carry out the transmission method of the various embodiments described above offer when being executed by processor, for example, be based on
Frequency spectrum perception technology modulates original source signal respectively into multiple pure frequency ranges, obtains corresponding multiple modulated signals,
In, the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；The multiple modulated signal is combined, is obtained
It is sent to receiver after to combining signal, so that the receiver obtains target information source based on the combining signal received
Signal.Alternatively, the combining signal that receiver/transmitter is sent, wherein the combining signal is that the transmitter is based on frequency spectrum perception
Technology modulates original source signal respectively into multiple pure frequency ranges, obtains corresponding multiple modulated signals and will be the multiple
What modulated signal was combined, the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；Based on described
It is combined signal, obtains target information source signal.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of spectrum spread communication method characterized by comprising
Based on frequency spectrum perception technology, original source signal is modulated respectively into multiple pure frequency ranges, obtains corresponding multiple tune
Signal processed, wherein the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；
The multiple modulated signal is combined, receiver is sent to after obtaining combining signal, so that the receiver base
Target information source signal is obtained in the combining signal received.
2. spectrum spread communication method according to claim 1, which is characterized in that frequency spectrum perception technology is based on, by original source
Signal is modulated respectively into multiple pure frequency ranges, and corresponding multiple modulated signals are obtained, comprising:
Based on frequency spectrum perception technology, multiple pure band informations are obtained, wherein each pure band information includes the pure frequency
Bandwidth, power and the center frequency point of section；
For each pure band information, the original source signal is modulated by the pure band information, is obtained
Modulated signal corresponding with the pure band information；
It obtains and the multiple pure band information multiple modulated signals correspondingly.
3. spectrum spread communication method according to claim 2, which is characterized in that by the pure band information to the original
Beginning source signal is modulated, and obtains modulated signal corresponding with the pure band information, comprising:
By the bandwidth in the pure band information, spread code length is determined, and the spreading code based on the length is to described
Original source signal is spread, and spread-spectrum signal is obtained；
The spread-spectrum signal is subjected to digital-to-analogue conversion, obtains analog signal；
Based on the center frequency point and power in the pure band information, by the analog signal up-conversion to the center frequency point
Place obtains modulated signal corresponding with the pure band information.
4. spectrum spread communication method according to claim 3, which is characterized in that the spread-spectrum signal is subjected to digital-to-analogue conversion,
Before further include:
Molding filtration is carried out to the spread-spectrum signal, the spread-spectrum signal after obtaining molding filtration；Correspondingly, by the spread-spectrum signal
Digital-to-analogue conversion is carried out, analog signal is obtained, comprising:
Spread-spectrum signal after the molding filtration is subjected to digital-to-analogue conversion, obtains analog signal.
5. a kind of spectrum spread communication method characterized by comprising
The combining signal that receiver/transmitter is sent, wherein the combining signal is that the transmitter will based on frequency spectrum perception technology
Original source signal is modulated respectively into multiple pure frequency ranges, is obtained corresponding multiple modulated signals and is believed the multiple modulation
It number is combined, the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；
Based on the combining signal, target information source signal is obtained.
6. spectrum spread communication method according to claim 5, which is characterized in that be based on the combining signal, obtain target letter
Source signal, comprising:
The combining signal is converted into multiple function sub-signals；
Each function sub-signal in the multiple function sub-signal is successively subjected to down coversion, analog-to-digital conversion, matched filtering, parameter are picked
It removes, synchronize, despreading and demodulation, obtaining and the multiple function sub-signal multiple demodulated signals correspondingly；
The multiple demodulated signal is subjected to diversity merging, obtains merging signal；
The merging signal is related to preset multiple candidate source signal progress, it obtains and the multiple candidate source signal
One-to-one multiple correlated results；
In the multiple correlated results, the corresponding candidate source signal of largest correlation result is selected to believe as the target information source
Number.
7. a kind of spread spectrum communication system characterized by comprising
Original source signal is modulated respectively into multiple pure frequency ranges, is obtained for being based on frequency spectrum perception technology by modulation module
Corresponding multiple modulated signals, wherein the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；
Sending module is sent to receiver after obtaining combining signal for the multiple modulated signal to be combined, so that
The receiver obtains target information source signal based on the combining signal received.
8. a kind of spread spectrum communication system characterized by comprising
Receiving module, the combining signal sent for receiver/transmitter, wherein the combining signal is that the transmitter is based on frequency
Spectrum cognition technology modulates original source signal respectively into multiple pure frequency ranges, obtains corresponding multiple modulated signals and by institute
State what multiple modulated signals were combined, the pure frequency range is the frequency range that interference signal intensity is less than preset threshold；
Recovery module obtains target information source signal for being based on the combining signal.
9. a kind of electronic equipment including memory, processor and stores the calculating that can be run on a memory and on a processor
Machine program, which is characterized in that the processor is realized when executing described program such as any one of claim 1 to 6 the method
Step.
10. a kind of non-transient computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer
It is realized when program is executed by processor such as the step of any one of claim 1 to 6 the method.
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