CN108737043A - A kind of carrier wave generation method and device - Google Patents
A kind of carrier wave generation method and device Download PDFInfo
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- CN108737043A CN108737043A CN201710256881.7A CN201710256881A CN108737043A CN 108737043 A CN108737043 A CN 108737043A CN 201710256881 A CN201710256881 A CN 201710256881A CN 108737043 A CN108737043 A CN 108737043A
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- carrier
- ofdm
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- waves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/0008—Wavelet-division
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/44—Jamming having variable characteristics characterized by the control of the jamming waveform or modulation type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2692—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Carrier wave generation method and device disclosed in the embodiment of the present invention include：Target OFDM carrier waves are obtained from OFDM carrier wave transmitting terminals；Determine the transmission feature of the pilot sub-carrier in target OFDM carrier waves；According to the transmission feature of pilot sub-carrier, determines the transmission feature of the interfering carrier interfered target OFDM carrier waves, generate corresponding interfering carrier；Interfering carrier is sent to OFDM carrier wave receiving terminals.Since the transmission feature that the transmission feature of interfering carrier in the embodiment of the present invention is foundation pilot sub-carrier determines, therefore, the transmission feature of interfering carrier is consistent with the transmission feature of pilot sub-carrier, interfering carrier can only interfere the pilot sub-carrier with the transmission feature that is consistent, the interfering carrier for only needing setting power minimum in the embodiment of the present invention, target OFDM carrier waves can be interfered, the carrier wave with the transmission feature that is not consistent that the other wireless telecom equipments in periphery transmit can't be interfered, to realize directional jamming to target OFDM carrier waves.
Description
Technical field
The present invention relates to radio communication technology fields, and in particular to a kind of carrier wave generation method and device.
Background technology
OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing) technology is extensive
Applied in wireless communication, such as carries out WiFi (Wireless-Fidelity, WiMAX) in mobile phone, remote controler etc. and communicate
Or often use OFDM technology during Bluetooth communication.
Currently, some criminals utilize OFDM technology, OFDM illegal communications are carried out, and OFDM illegal communications can be to normal
Communication service threaten, therefore, how to OFDM illegal communications implement interfere, referred to as current urgent problem to be solved.Mesh
Before, common OFDM illegal communications interference method is Electromagnetic Interference method, i.e., after finding the carrier wave of OFDM illegal communications, transmitting
Great-power electromagnetic wave radiation interferes the carrier wave of OFDM illegal communications, to prevent OFDM illegal communications.
However, since Electromagnetic Interference is a kind of interference not differentiating between target, moreover, the great-power electromagnetic wave radiation of transmitting
Range is wide, while interfering OFDM illegal communications, can also interfere with to (such as the hand of other wireless telecom equipments existing for periphery
Machine, remote controler etc.) so that other wireless telecom equipments can not be normally carried out wireless communication, therefore, disturber in the prior art
Method can not realize directional jamming to OFDM illegal communications.
Invention content
In view of this, a kind of carrier wave generation method of offer of the embodiment of the present invention and device, it can be real to OFDM illegal communications
Existing directional jamming.
To achieve the above object, the embodiment of the present invention provides the following technical solutions：
A kind of carrier wave generation method, including：
Target OFDM carrier waves are obtained from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal；
Determine the transmission feature of the pilot sub-carrier in the target OFDM carrier waves；
According to the transmission feature of the pilot sub-carrier, the interfering carrier interfered the target OFDM carrier waves is determined
Transmission feature, generate corresponding interfering carrier；
The interfering carrier is sent to OFDM carrier wave receiving terminals.
Preferably, the target OFDM carrier waves are done in the transmission feature according to the pilot sub-carrier, determination
The transmission feature for the interfering carrier disturbed, the process for generating corresponding interfering carrier include：
According to the transmission feature of the pilot sub-carrier, the transmission frequency of the pilot sub-carrier is obtained；
According to the transmission frequency of the pilot sub-carrier, generate has identical traffic frequency with the pilot sub-carrier, right
The noise jamming carrier wave that pilot sub-carrier in the target OFDM carrier waves is interfered.
Preferably, the target OFDM carrier waves are done in the transmission feature according to the pilot sub-carrier, determination
The transmission feature for the interfering carrier disturbed, the process for generating corresponding interfering carrier include：
According to the transmission feature of the pilot sub-carrier, the OFDM modulation parameters of the pilot sub-carrier are obtained；
According to the OFDM modulation parameters, generate with the pilot sub-carrier with identical OFDM modulation parameters type, no
With OFDM modulation parameters content, the Pilot Interference carrier wave interfered the pilot sub-carrier in the target OFDM carrier waves.
Preferably, according to the OFDM modulation parameters and navigation content, generate has phase with the pilot sub-carrier
With OFDM modulation parameters type, difference OFDM modulation parameters content, the pilot sub-carrier in the target OFDM carrier waves is carried out
After the Pilot Interference carrier wave of interference, further include：
According to the Pilot Interference carrier wave, the number interfered the data subcarrier in the target OFDM carrier waves is generated
According to interfering carrier, wherein the data interfering carrier is carried out according to the OFDM modulation parameter contents of the Pilot Interference carrier wave
Modulation, the data content in the data subcarrier in data content and the OFDM carrier waves in the data interfering carrier is not
Together.
Preferably, before the interfering carrier is sent to OFDM carrier wave receiving terminals, further include：
The temporal aspect that the target OFDM carrier waves are obtained from the carrier content in the target OFDM carrier waves, when described
The transmission opportunity that the OFDM carrier waves transmitting terminal sends target OFDM carrier waves is described in sequence characteristics.
Preferably, the process that the interfering carrier is sent to OFDM carrier wave receiving terminals includes：
While the OFDM carrier waves transmitting terminal sends target OFDM carrier waves next time, by generation and pilot tone
Carrier wave has identical traffic frequency, to the noise jamming carrier wave that the pilot sub-carrier in the target OFDM carrier waves is interfered,
It is sent to OFDM carrier wave receiving terminals.
Preferably, the process that the interfering carrier is sent to OFDM carrier wave receiving terminals includes：
Before the OFDM carrier waves transmitting terminal sends target OFDM carrier waves next time, generation and pilot tone are carried
Wave has identical OFDM modulation parameters type, difference OFDM modulation parameters content, to pilot tone in the target OFDM carrier waves
The Pilot Interference carrier wave that carrier wave is interfered is sent to OFDM carrier wave receiving terminals.
Preferably, the process that the interfering carrier is sent to OFDM carrier wave receiving terminals includes：
While sending Pilot Interference carrier wave, by being carried out to the data subcarrier in the target OFDM carrier waves for generation
The data interfering carrier of interference is sent to OFDM carrier wave receiving terminals.
A kind of carrier forming device, including：
Target OFDM carrier acquisition modules are carried for obtaining target OFDM from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal
Wave；
Transmission feature determining module, the transmission feature for determining the pilot sub-carrier in the target OFDM carrier waves；
Interfering carrier generation module is determined for the transmission feature according to the pilot sub-carrier to the target OFDM
The transmission feature for the interfering carrier that carrier wave is interfered generates corresponding interfering carrier；
Interfering carrier sending module, for the interfering carrier to be sent to OFDM carrier wave receiving terminals.
Preferably, the interfering carrier generation module includes：
Transmission frequency acquisition module obtains the pilot sub-carrier for the transmission feature according to the pilot sub-carrier
Transmission frequency；
Noise jamming carrier wave generation module generates and the pilot tone for the transmission frequency according to the pilot sub-carrier
Subcarrier has identical traffic frequency, and the noise jamming interfered the pilot sub-carrier in the target OFDM carrier waves carries
Wave.
Preferably, the interfering carrier generation module includes：
OFDM modulation parameter acquisition modules obtain pilot tone for the transmission feature according to the pilot sub-carrier
The OFDM modulation parameters of carrier wave；
Pilot Interference carrier wave generation module, for according to the OFDM modulation parameters, generating and having with the pilot sub-carrier
There are identical OFDM modulation parameters type, difference OFDM modulation parameters content, to the pilot sub-carrier in the target OFDM carrier waves
The Pilot Interference carrier wave interfered.
Preferably, further include：
Data interfering carrier generation module, for according to the Pilot Interference carrier wave, generating to the target OFDM carrier waves
In the data interfering carrier that is interfered of data subcarrier, wherein the data interfering carrier is according to the Pilot Interference
What the OFDM modulation parameter contents of carrier wave were modulated, in the data content and the OFDM carrier waves in the data interfering carrier
Data subcarrier in data content it is different.
Preferably, further include：
Temporal aspect acquisition module, for obtaining the target OFDM from the carrier content in the target OFDM carrier waves
The temporal aspect of carrier wave, when describing the OFDM carrier waves transmitting terminal in the temporal aspect and sending the transmission of target OFDM carrier waves
Machine.
Preferably, the interfering carrier sending module includes：
Noise jamming carrier wave sending module, for sending target OFDM carrier waves next time in the OFDM carrier waves transmitting terminal
Meanwhile generation and the pilot sub-carrier are had into identical traffic frequency, pilot tone in the target OFDM carrier waves is carried
The noise jamming carrier wave that wave is interfered is sent to OFDM carrier wave receiving terminals.
Preferably, the interfering carrier sending module includes：
Pilot Interference carrier wave sending module, for the OFDM carrier waves transmitting terminal send next time target OFDM carrier waves it
Before, generation is had into identical OFDM modulation parameters type, different OFDM modulation parameters contents from the pilot sub-carrier, to institute
The Pilot Interference carrier wave that the pilot sub-carrier in target OFDM carrier waves is interfered is stated, OFDM carrier wave receiving terminals are sent to.
Based on the above-mentioned technical proposal, carrier wave generation method and device disclosed in the embodiment of the present invention include：From orthogonal frequency
Divide in multiplexing OFDM carrier wave transmitting terminals and obtains target OFDM carrier waves；Determine the biography of the pilot sub-carrier in the target OFDM carrier waves
Defeated feature；According to the transmission feature of the pilot sub-carrier, the interfering carrier interfered the target OFDM carrier waves is determined
Transmission feature, generate corresponding interfering carrier；The interfering carrier is sent to OFDM carrier wave receiving terminals.Due to of the invention real
The transmission feature for applying interfering carrier in example is that the transmission feature of foundation pilot sub-carrier determines, therefore, the transmission of interfering carrier
Feature is consistent with the transmission feature of pilot sub-carrier, and interfering carrier can only interfere pilot tone with the transmission feature that is consistent to carry
Wave, the interfering carrier for therefore, in the embodiment of the present invention only needing setting power minimum, it will be able to which target OFDM carrier waves are done
It disturbs, the carrier wave with the transmission feature that is not consistent that the other wireless telecom equipments in periphery transmit can't be interfered, so, this
The interfering carrier generated in inventive embodiments can realize directional jamming to target OFDM carrier waves.
Description of the drawings
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 technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the subcarrier on frequency domain after a kind of OFDM carrier signals provided in an embodiment of the present invention carry out FFT demodulation
Structural schematic diagram；
Fig. 2 is that a kind of carrier wave provided in an embodiment of the present invention generates system structure diagram；
Fig. 3 is a kind of signaling process figure of carrier wave generation method provided in an embodiment of the present invention；
Fig. 4 is a kind of flow chart of carrier wave generation method provided in an embodiment of the present invention；
Fig. 5 is a kind of signal interference module diagram provided in an embodiment of the present invention；
Fig. 6 is the flow chart of another carrier wave generation method provided in an embodiment of the present invention；
Fig. 7 is the flow chart of another carrier wave generation method provided in an embodiment of the present invention；
Fig. 8 is the flow chart of another carrier wave generation method provided in an embodiment of the present invention；
Fig. 9 is a kind of structure diagram of carrier forming device provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It should be noted that OFDM is a kind of multi-carrier modulation technology, OFDM carrier signals are subjected to FFT (Fast
Fourier Transformation, fast Fourier transform) demodulation after, the sub-carrier structure on frequency domain is as shown in Figure 1.?
The grey parts of the left and right sides are protection bandwidth in sub-carrier structure, are the subcarriers of sky, do not carry any content, and effect is
Different communication channel is separated, real data are protected, by taking the OFDM carrier waves of 802.11a/g types as an example, left side frequency is lower
Protection bandwidth location has 6 subcarriers, the higher protection bandwidth location of right side frequency to have 5 subcarriers.In addition, in subcarrier knot
In structure other than the protection bandwidth of the left and right sides, the carrier wave of middle section is divided into two classes, and one kind is indicated using solid arrow,
Plant oneself more data subcarrier, and another kind of indicated using dotted arrow, and plant oneself less pilot sub-carrier,
By taking the OFDM carrier waves of 802.11a/g types as an example, the OFDM carrier waves of a 802.11a/g type are divided into 52 subcarriers, wherein
48 are data subcarrier, and 4 are pilot sub-carrier.
It should be noted that the pilot sub-carrier in OFDM carrier waves is a kind of reference signal, wherein carrying about OFDM
Carrier modulation parameter, specifically includes：Carrier synchronization parameter, data training parameter, channel estimation parameter and signal demodulation parameter
Deng for carrying out carrier synchronization, estimation channel parameter and carrying out signal demodulation.All data subcarriers received, it is necessary to
It could correctly be demodulated according to corresponding pilot sub-carrier.
Since the transmission feature of interfering carrier in the embodiment of the present invention is according to pilot sub-carrier in the embodiment of the present invention
What transmission feature determined, therefore, the transmission feature of the interfering carrier of generation is consistent with the transmission feature of pilot sub-carrier, does
The pilot sub-carrier with the transmission feature that is consistent can only be interfered by disturbing carrier wave so that the recipient in target OFDM carrier waves does not receive
Correct pilot sub-carrier, to can not normally be demodulated to data subcarrier, to block OFDM carrier waves transmitting terminal and
Writing to each other between OFDM carrier wave receiving terminals.Moreover, the interfering carrier for only needing setting power minimum in the embodiment of the present invention, just
Target OFDM carrier waves can be interfered, what can't be transmitted to the other wireless telecom equipments in periphery has the transmission that is not consistent special
The carrier wave of sign interferes, so, the interfering carrier generated in the embodiment of the present invention can realize target OFDM carrier waves and orient
Interference.
In the following, in conjunction with specific embodiments, the detailed process for disclosed carrier wave generation method that the present invention will be described in detail, this hair
Carrier wave generation method in bright embodiment is applied to carrier wave and generates system, and carrier wave as shown in Figure 2 generates system structure diagram,
The carrier wave generates system：Carrier receiver 10, carrier processing machine 20 and multicarrier transmitter 30, Fig. 3 shows one kind
The signaling process figure of carrier wave generation method, this method can generate system by carrier wave and realize, reference Fig. 3, the method may include：
Step S10, carrier receiver obtains target OFDM carrier waves from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal；
It should be noted that the carrier receiver in the embodiment of the present invention is not necessarily deployed in carrier-in-interference scene, it can be with
The collection of carrier wave is carried out in advance, such as：Unmanned plane model machine (OFDM carrier waves receiving terminal) can be opened, and (OFDM is carried with remote controler model machine
Wave transmitting terminal), carry out the flight remote control of unmanned plane, you can using carrier receiver obtain remote controler model machine and unmanned plane model machine it
Between the target OFDM carrier waves that transmit.
Step S20, the target OFDM carrier waves are sent to carrier processing machine by carrier receiver；
Step S30, carrier processing machine determines the transmission feature of the pilot sub-carrier in the target OFDM carrier waves；
Step S40, transmission feature of the carrier processing machine according to the pilot sub-carrier is determined to the target OFDM carrier waves
The transmission feature of the interfering carrier interfered generates corresponding interfering carrier；
Step S50, interfering carrier is sent to multicarrier transmitter by carrier processing machine；
Step S60, the interfering carrier is sent to OFDM carrier wave receiving terminals by multicarrier transmitter.
In the embodiment of the present invention, since the transmission feature of interfering carrier in the embodiment of the present invention is according to pilot sub-carrier
What transmission feature determined, therefore, the transmission of the transmission feature and pilot sub-carrier of the interfering carrier generated by carrier processing machine
It is characterized in being consistent, interfering carrier can only interfere the pilot sub-carrier with the transmission feature that is consistent so that in target OFDM carrier waves
Recipient do not receive correct pilot sub-carrier, to can not normally be demodulated to data subcarrier, to block
Writing to each other between OFDM carrier waves transmitting terminal and OFDM carrier wave receiving terminals.Moreover, only needing setting power in the embodiment of the present invention
Minimum interfering carrier, it will be able to target OFDM carrier waves be interfered, the other wireless telecom equipments in periphery can't be transmitted
There is the carrier wave of transmission feature of not being consistent to interfere, so, the interfering carrier generated in the embodiment of the present invention can be to mesh
It marks OFDM carrier waves and realizes directional jamming.
Fig. 4 shows that a kind of flow chart of carrier wave generation method, this method can generate system by carrier wave and realize, with reference to
Fig. 4, carrier wave generation method disclosed in embodiment that the present invention will be described in detail, the method may include：
Step S100, target OFDM carrier waves are obtained from OFDM carrier wave transmitting terminals；
It should be noted that target OFDM is obtained in the embodiment of the present invention from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal
The process of carrier wave may include：The OFDM carrier waves that the OFDM carrier waves transmitting terminal is sent are obtained from OFDM carrier wave transmitting terminals；It carries
Take the carrier wave feature of the OFDM carrier waves；The carrier wave feature and pre-set target carrier for judging the OFDM carrier waves are characterized in
It is no to match；If it is, will state OFDM carrier waves is determined as target OFDM carrier waves.
In the embodiment of the present invention, pre-set target carrier feature suits the requirements the target OFDM carrier waves interfered
Carrier wave feature, judge the carrier wave feature of the OFDM carrier waves and pre-set target carrier feature whether match be in order to from
The target OFDM carrier waves interfered are selected in multiple OFDM carrier waves.
Step S110, the transmission feature of the pilot sub-carrier in the target OFDM carrier waves is determined；
It should be noted that the transmission feature of pilot sub-carrier shows characteristic of the pilot sub-carrier in transmission, true
During the transmission feature of pilot sub-carrier in the fixed target OFDM carrier waves, need first to the target OFDM carrier waves into
Row demodulation, obtains the carrier content in the target OFDM carrier waves；Then pilot sub-carrier is obtained from the carrier content again
Transmission feature.
Optionally, in the embodiment of the present invention can to the aforementioned target OFDM carrier waves initial digital signal being demodulated into
Row analysis, obtains the transmission features such as OFDM symbol frame structure and sequential, pilot tone, channel, coding mode.
It should be noted that may be used also other than collecting the transmission feature of pilot sub-carrier online in the embodiment of the present invention
Carry out the collection of the transmission feature of pilot sub-carrier in advance in such a way that use is offline, and can be direct in carrier wave generating process
Using the transmission feature for the pilot sub-carrier collected in advance, the interfering carrier interfered the target OFDM carrier waves is determined
Transmission feature generates corresponding interfering carrier.
Step S120, the target OFDM carrier waves are interfered in the transmission feature according to the pilot sub-carrier, determination
Interfering carrier transmission feature, generate corresponding interfering carrier；
It should be noted that since the transmission feature of interfering carrier in the embodiment of the present invention is the biography according to pilot sub-carrier
What defeated feature determined, therefore, the transmission feature of the interfering carrier is consistent with the transmission feature of the pilot sub-carrier, that is, interferes
The transmission features such as sequential, pilot tone, channel, the coding mode of carrier wave are consistent with transmission feature used by pilot sub-carrier.
Step S130, the interfering carrier is sent to OFDM carrier wave receiving terminals.
Carrier wave generation method disclosed in the embodiment of the present invention includes：It is obtained from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal
Take target OFDM carrier waves；Determine the transmission feature of the pilot sub-carrier in the target OFDM carrier waves；It is carried according to pilot tone
The transmission feature of wave generates the interfering carrier interfered the target OFDM carrier waves, wherein due in the embodiment of the present invention
The transmission feature of interfering carrier is that the transmission feature of foundation pilot sub-carrier determines, therefore, the transmission of the interfering carrier is special
Sign is consistent with the transmission feature of the pilot sub-carrier；The interfering carrier is sent to OFDM carrier wave receiving terminals.Due to this hair
The transmission feature of the interfering carrier generated in bright embodiment is consistent with the transmission feature of pilot sub-carrier, and interfering carrier can only
Interfering has the pilot sub-carrier for the transmission feature that is consistent, and the interference for therefore, in the embodiment of the present invention only needing setting power minimum carries
Wave, it will be able to target OFDM carrier waves be interfered, having for can't being transmitted to the other wireless telecom equipments in periphery is not consistent
The carrier wave of transmission feature interferes, so, the interfering carrier generated in the embodiment of the present invention can be real to target OFDM carrier waves
Existing directional jamming.Meanwhile it is logical can be continued by lasting transmission interfering carrier by jamming target OFDM in our religious name embodiment
Letter, makes the communication between OFDM carrier waves transmitting terminal and OFDM carrier wave receiving terminals be blocked completely.
Below with above-mentioned technical proposal disclosed in a specific scene the present invention will be described in detail embodiment：
Using the technical solution in the embodiment of the present invention, the signal interference being remotely controlled between device and unmanned plane, in conjunction with such as
Signal interference module diagram shown in fig. 5, the signal in embodiment that the present invention will be described in detail between remote controler and unmanned plane
Interfering process：
Signal collection machine obtains the target OFDM carrier waves of remote controler transmitting from remote controler；Signal collection machine is by target OFDM
Carrier wave is sent to signal processor, and it is pseudo- that signal processor carries out signal demodulation, signal analysis and signal to target OFDM carrier waves
Process is made, the interfering carrier interfered the target OFDM carrier waves is obtained, interfering carrier is sent to letter by signal processor
Number transmitter, signal transmitter emit interference signal to unmanned plane.
Since the transmission features such as the sequential of aforementioned interfering carrier, pilot tone, channel, coded format are consistent completely with remote controler,
Unmanned plane can be construed as a legal OFDM carrier signal, and carry according to the interference after receiving aforementioned interfering carrier
Pilot signal in wave adjusts the channel parameter of oneself, to be demodulated to the data subcarrier in carrier signal, to complete
At an ofdm signal receive process.
Then, when remote controler respective channel, emit according to corresponding time sequence the OFDM carrier signals of oneself when, although this is
Unmanned plane really should received signal, but due to unmanned plane have been received it is aforementioned accidentally interfering carrier, and according to
The regulation of interfering carrier by the channel parameter adjustment of oneself to another group of numerical value, for specifically receive remote controler emitted it is true
Positive carrier signal, UAV targets will be unable to be properly received, demodulate this signal.In this way, between remote controler and unmanned plane
Ofdm communication is just blocked.It repeats above step, persistently sends interfering carrier, then it can be with sustained blockade remote controler and unmanned plane
Between communication, to make remote controler thoroughly lose the control to unmanned plane.
In the following, specifically introducing another carrier wave generation method in present example, carrier wave generation side disclosed in Fig. 6 is please referred to
Method flow chart, this method may include：
Step S200, target OFDM carrier waves are obtained from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal；
Step S210, the transmission feature of the pilot sub-carrier in the target OFDM carrier waves is determined；
Step S220, the transmission feature according to the pilot sub-carrier obtains the transmission frequency of the pilot sub-carrier；
Step S230, the transmission frequency according to the pilot sub-carrier, generate has phase simultaneous interpretation with the pilot sub-carrier
Defeated frequency, the noise jamming carrier wave that the pilot sub-carrier in the target OFDM carrier waves is interfered；
It should be noted that the noise jamming carrier wave in the embodiment of the present invention can be any type of noise signal, example
Such as：White Gaussian noise signal etc., the embodiment of the present invention is not specifically limited.
Step S240, the sequential that the target OFDM carrier waves are obtained from the carrier content in the target OFDM carrier waves is special
Sign；
The transmission opportunity that the OFDM carrier waves transmitting terminal sends target OFDM carrier waves is described in the temporal aspect.
Step S250, while the OFDM carrier waves transmitting terminal sends target OFDM carrier waves next time, by generation with
The pilot sub-carrier has identical traffic frequency, the noise interfered the pilot sub-carrier in the target OFDM carrier waves
Interfering carrier is sent to OFDM carrier wave receiving terminals.
By generating the noise jamming carrier wave that there is identical traffic frequency with the pilot sub-carrier in the embodiment of the present invention,
And while OFDM carrier waves transmitting terminal sends target OFDM carrier waves next time, the noise jamming carrier wave is sent together,
And then the pilot sub-carrier of identical traffic frequency is interfered so that OFDM carrier waves receiving terminal can not receive correct pilot tone
Subcarrier carries target OFDM to realize to can not correctly be demodulated to the data subcarrier in target OFDM carrier waves
The purpose of wave directional jamming.
In the following, specifically introducing another carrier wave generation method in present example, carrier wave generation side disclosed in Fig. 7 is please referred to
Method flow chart, this method may include：
Step S300, target OFDM carrier waves are obtained from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal；
Step S310, the transmission feature of the pilot sub-carrier in the target OFDM carrier waves is determined；
Step S320, the transmission feature according to the pilot sub-carrier obtains the OFDM modulation ginsengs of the pilot sub-carrier
Number；
OFDM modulation parameters specifically include：Carrier synchronization parameter, data training parameter, channel estimation parameter and signal solution
Parameter etc. is adjusted, the embodiment of the present invention is not specifically limited.
Step S330, according to the OFDM modulation parameters, generating with the pilot sub-carrier there is identical OFDM modulation to join
Several classes of types, difference OFDM modulation parameters content, the pilot tone interfered to the pilot sub-carrier in the target OFDM carrier waves are dry
Disturb carrier wave；
Optionally, the synchronization time in OFDM modulation parameters can be changed in the embodiment of the present invention, such as by synchronization time
In advance, such OFDM carrier waves receiving terminal will be unable to accurate synchronization and demodulate subsequently received data subcarrier.Optionally, of the invention
The numerical value of the correction data in OFDM modulation parameters can also be changed in embodiment, so that OFDM carrier wave receiving terminals can not be just
Really correct the data in subsequently received data subcarrier.It can also change in OFDM modulation parameters in the embodiment of the present invention
Other content value, the embodiment of the present invention are not specifically limited.
Step S340, the sequential that the target OFDM carrier waves are obtained from the carrier content in the target OFDM carrier waves is special
Sign；
The transmission opportunity that the OFDM carrier waves transmitting terminal sends target OFDM carrier waves is described in the temporal aspect.
Step S350, before the OFDM carrier waves transmitting terminal sends target OFDM carrier waves next time, by generation and institute
Stating pilot sub-carrier has identical OFDM modulation parameters type, difference OFDM modulation parameters content, to the target OFDM carrier waves
In the Pilot Interference carrier wave that is interfered of pilot sub-carrier, be sent to OFDM carrier wave receiving terminals.
Since the Pilot Interference carrier wave generated in the embodiment of the present invention is modulated with the pilot sub-carrier with identical OFDM
Parameter type, therefore, then when Pilot Interference carrier wave is sent to OFDM carrier wave receiving terminals, OFDM carrier waves receiving terminal can be by it
It is received as legal pilot sub-carrier, and inherent parameters is carried out according to the OFDM modulation parameter contents in Pilot Interference carrier wave
Adjustment, carry out carrier synchronization, channel adjustment, to demodulating subsequently received data subcarrier with this, but due to pilot tone
In the OFDM modulation parameters of pilot sub-carrier in the OFDM modulation parameters content and target OFDM carrier waves that are carried in interfering carrier
Hold different, the OFDM modulation parameter contents carried in Pilot Interference carrier wave have misleading, and ginseng is modulated according to misleading OFDM
Number content then can not correctly demodulate the data subcarrier in target OFDM carrier waves, realize to target OFDM carrier wave directional jammings
Purpose.
In the following, specifically introducing another carrier wave generation method in present example, carrier wave generation side disclosed in Fig. 8 is please referred to
Method flow chart, this method may include：
Step S400, target OFDM carrier waves are obtained from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal；
Step S410, the transmission feature of the pilot sub-carrier in the target OFDM carrier waves is determined；
Step S420, the transmission feature according to the pilot sub-carrier obtains the OFDM modulation ginsengs of the pilot sub-carrier
Number；
OFDM modulation parameters specifically include：Carrier synchronization parameter, data training parameter, channel estimation parameter and signal solution
Parameter etc. is adjusted, the embodiment of the present invention is not specifically limited.
Step S430, according to the OFDM modulation parameters, generating with the pilot sub-carrier there is identical OFDM modulation to join
Several classes of types, difference OFDM modulation parameters content, the pilot tone interfered to the pilot sub-carrier in the target OFDM carrier waves are dry
Disturb carrier wave；
Step S440, according to the Pilot Interference carrier wave, generate to the data subcarrier in the target OFDM carrier waves into
The data interfering carrier of row interference；
Wherein, the data interfering carrier is modulated according to the OFDM modulation parameter contents of the Pilot Interference carrier wave
, the data content in the data interfering carrier is different from the data content in the data subcarrier in the OFDM carrier waves.
Step S450, the sequential that the target OFDM carrier waves are obtained from the carrier content in the target OFDM carrier waves is special
Sign；
The transmission opportunity that the OFDM carrier waves transmitting terminal sends target OFDM carrier waves is described in the temporal aspect.
Step S460, before the OFDM carrier waves transmitting terminal sends target OFDM carrier waves next time, by the pilot tone of generation
Interfering carrier and data interfering carrier are sent to OFDM carrier wave receiving terminals.
Also according to the Pilot Interference carrier wave in the embodiment of the present invention, generate to data in the target OFDM carrier waves
The data interfering carrier that carrier wave is interfered, the data interfering carrier are the OFDM using misleading Pilot Interference carrier wave defined
Modulation parameter content is modulated, therefore it can be properly received and demodulated by OFDM carrier wave receiving terminals.In this way, the present invention is real
Example is applied just and not only realized the interference to target OFDM carrier waves, also achieves the modification to its Content of Communication.
Carrier forming device provided in an embodiment of the present invention is introduced below, carrier forming device described below can
Reference is corresponded with carrier wave generation method above.
Fig. 9 is the structure diagram of carrier forming device provided in an embodiment of the present invention, with reference to Fig. 9, the carrier forming device
May include：
Target OFDM carrier acquisition modules 100, for obtaining target from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal
OFDM carrier waves；
Transmission feature determining module 110, the transmission feature for determining the pilot sub-carrier in the target OFDM carrier waves；
Interfering carrier generation module 120 is determined for the transmission feature according to the pilot sub-carrier to the target
The transmission feature for the interfering carrier that OFDM carrier waves are interfered generates corresponding interfering carrier；
Interfering carrier sending module 130, for the interfering carrier to be sent to OFDM carrier wave receiving terminals.
The interfering carrier generation module includes：
Transmission frequency acquisition module obtains the pilot sub-carrier for the transmission feature according to the pilot sub-carrier
Transmission frequency；
Noise jamming carrier wave generation module generates and the pilot tone for the transmission frequency according to the pilot sub-carrier
Subcarrier has identical traffic frequency, and the noise jamming interfered the pilot sub-carrier in the target OFDM carrier waves carries
Wave.
The interfering carrier generation module includes：
OFDM modulation parameter acquisition modules obtain pilot tone for the transmission feature according to the pilot sub-carrier
The OFDM modulation parameters of carrier wave；
Pilot Interference carrier wave generation module, for according to the OFDM modulation parameters, generating and having with the pilot sub-carrier
There are identical OFDM modulation parameters type, difference OFDM modulation parameters content, to the pilot sub-carrier in the target OFDM carrier waves
The Pilot Interference carrier wave interfered.
Further include：
Data interfering carrier generation module, for according to the Pilot Interference carrier wave, generating to the target OFDM carrier waves
In the data interfering carrier that is interfered of data subcarrier, wherein the data interfering carrier is according to the Pilot Interference
What the OFDM modulation parameter contents of carrier wave were modulated, in the data content and the OFDM carrier waves in the data interfering carrier
Data subcarrier in data content it is different.
Further include：
Temporal aspect acquisition module, for obtaining the target OFDM from the carrier content in the target OFDM carrier waves
The temporal aspect of carrier wave, when describing the OFDM carrier waves transmitting terminal in the temporal aspect and sending the transmission of target OFDM carrier waves
Machine.
The interfering carrier sending module includes：
Noise jamming carrier wave sending module, for sending target OFDM carrier waves next time in the OFDM carrier waves transmitting terminal
Meanwhile generation and the pilot sub-carrier are had into identical traffic frequency, pilot tone in the target OFDM carrier waves is carried
The noise jamming carrier wave that wave is interfered is sent to OFDM carrier wave receiving terminals.
The interfering carrier sending module includes：
Pilot Interference carrier wave sending module, for the OFDM carrier waves transmitting terminal send next time target OFDM carrier waves it
Before, generation is had into identical OFDM modulation parameters type, different OFDM modulation parameters contents from the pilot sub-carrier, to institute
The Pilot Interference carrier wave that the pilot sub-carrier in target OFDM carrier waves is interfered is stated, OFDM carrier wave receiving terminals are sent to.
The interfering carrier sending module includes：
Data interfering carrier sending module is used for while sending Pilot Interference carrier wave, by generation to the target
The data interfering carrier that data subcarrier in OFDM carrier waves is interfered is sent to OFDM carrier wave receiving terminals.
In summary：
Carrier wave generation method and device disclosed in the embodiment of the present invention include：It is sent from orthogonal frequency division multiplex OFDM carrier wave
Target OFDM carrier waves are obtained in end；Determine the transmission feature of the pilot sub-carrier in the target OFDM carrier waves；It is led according to described in
The transmission feature of frequency subcarrier determines the transmission feature of the interfering carrier interfered the target OFDM carrier waves, generates phase
The interfering carrier answered；The interfering carrier is sent to OFDM carrier wave receiving terminals.Due to interfering carrier in the embodiment of the present invention
Transmission feature is that the transmission feature of foundation pilot sub-carrier determines, therefore, the transmission feature and pilot sub-carrier of interfering carrier
Transmission feature be consistent, interfering carrier can only be interfered with the pilot sub-carrier of transmission feature of being consistent, and therefore, the present invention is real
Apply in example the interfering carrier for only needing setting power minimum, it will be able to target OFDM carrier waves are interfered, can't to periphery its
The carrier wave with the transmission feature that is not consistent of its wireless telecom equipment transmission interferes, so, it is generated in the embodiment of the present invention
Interfering carrier can to target OFDM carrier waves realize directional jamming.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, place is referring to method part illustration
It can.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, depends on the specific application and design constraint of technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (15)
1. a kind of carrier wave generation method, which is characterized in that including：
Target OFDM carrier waves are obtained from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal；
Determine the transmission feature of the pilot sub-carrier in the target OFDM carrier waves；
According to the transmission feature of the pilot sub-carrier, the biography of the interfering carrier interfered the target OFDM carrier waves is determined
Defeated feature generates corresponding interfering carrier；
The interfering carrier is sent to OFDM carrier wave receiving terminals.
2. according to the method described in claim 1, it is characterized in that, the transmission feature according to the pilot sub-carrier, really
The transmission feature of the fixed interfering carrier interfered the target OFDM carrier waves, generates the process packet of corresponding interfering carrier
It includes：
According to the transmission feature of the pilot sub-carrier, the transmission frequency of the pilot sub-carrier is obtained；
According to the transmission frequency of the pilot sub-carrier, generate has identical traffic frequency with the pilot sub-carrier, to described
The noise jamming carrier wave that pilot sub-carrier in target OFDM carrier waves is interfered.
3. according to the method described in claim 1, it is characterized in that, the transmission feature according to the pilot sub-carrier, really
The transmission feature of the fixed interfering carrier interfered the target OFDM carrier waves, generates the process packet of corresponding interfering carrier
It includes：
According to the transmission feature of the pilot sub-carrier, the OFDM modulation parameters of the pilot sub-carrier are obtained；
According to the OFDM modulation parameters, generate has identical OFDM modulation parameters type, difference with the pilot sub-carrier
OFDM modulation parameters content, the Pilot Interference carrier wave that the pilot sub-carrier in the target OFDM carrier waves is interfered.
4. according to the method described in claim 3, it is characterized in that, according to the OFDM modulation parameters and navigation content,
Generate has identical OFDM modulation parameters type, different OFDM modulation parameters contents, to the target from the pilot sub-carrier
After the Pilot Interference carrier wave that pilot sub-carrier in OFDM carrier waves is interfered, further include：
According to the Pilot Interference carrier wave, it is dry to generate the data interfered the data subcarrier in the target OFDM carrier waves
Disturb carrier wave, wherein the data interfering carrier is modulated according to the OFDM modulation parameter contents of the Pilot Interference carrier wave
, the data content in the data interfering carrier is different from the data content in the data subcarrier in the OFDM carrier waves.
5. according to the method described in claim 1, it is characterized in that, the interfering carrier is sent to OFDM carrier wave receiving terminals
Before, further include：
The temporal aspect of the target OFDM carrier waves is obtained from the carrier content in the target OFDM carrier waves, the sequential is special
The transmission opportunity that the OFDM carrier waves transmitting terminal sends target OFDM carrier waves is described in sign.
6. the method according to claim 2 or 5, which is characterized in that described that the interfering carrier is sent to OFDM carrier waves
The process of receiving terminal includes：
While the OFDM carrier waves transmitting terminal sends target OFDM carrier waves next time, by generation and the pilot sub-carrier
The noise jamming carrier wave that the pilot sub-carrier in the target OFDM carrier waves is interfered is sent with identical traffic frequency
To OFDM carrier wave receiving terminals.
7. the method according to claim 3 or 5, which is characterized in that described that the interfering carrier is sent to OFDM carrier waves
The process of receiving terminal includes：
Before the OFDM carrier waves transmitting terminal sends target OFDM carrier waves next time, generation and the pilot sub-carrier are had
There are identical OFDM modulation parameters type, difference OFDM modulation parameters content, to the pilot sub-carrier in the target OFDM carrier waves
The Pilot Interference carrier wave interfered is sent to OFDM carrier wave receiving terminals.
8. method according to claim 4 or 5, which is characterized in that described that the interfering carrier is sent to OFDM carrier waves
The process of receiving terminal includes：
While sending Pilot Interference carrier wave, by interfering the data subcarrier in the target OFDM carrier waves for generation
Data interfering carrier, be sent to OFDM carrier wave receiving terminals.
9. a kind of carrier forming device, which is characterized in that including：
Target OFDM carrier acquisition modules, for obtaining target OFDM carrier waves from orthogonal frequency division multiplex OFDM carrier wave transmitting terminal；
Transmission feature determining module, the transmission feature for determining the pilot sub-carrier in the target OFDM carrier waves；
Interfering carrier generation module is determined for the transmission feature according to the pilot sub-carrier to the target OFDM carrier waves
The transmission feature of the interfering carrier interfered generates corresponding interfering carrier；
Interfering carrier sending module, for the interfering carrier to be sent to OFDM carrier wave receiving terminals.
10. device according to claim 9, which is characterized in that the interfering carrier generation module includes：
Transmission frequency acquisition module obtains the biography of the pilot sub-carrier for the transmission feature according to the pilot sub-carrier
Defeated frequency；
Noise jamming carrier wave generation module is generated and is carried with pilot tone for the transmission frequency according to the pilot sub-carrier
Wave has identical traffic frequency, the noise jamming carrier wave interfered the pilot sub-carrier in the target OFDM carrier waves.
11. device according to claim 9, which is characterized in that the interfering carrier generation module includes：
OFDM modulation parameter acquisition modules obtain the pilot sub-carrier for the transmission feature according to the pilot sub-carrier
OFDM modulation parameters；
Pilot Interference carrier wave generation module, for according to the OFDM modulation parameters, generate to have phase with the pilot sub-carrier
With OFDM modulation parameters type, difference OFDM modulation parameters content, the pilot sub-carrier in the target OFDM carrier waves is carried out
The Pilot Interference carrier wave of interference.
12. according to the devices described in claim 11, which is characterized in that further include：
Data interfering carrier generation module, for according to the Pilot Interference carrier wave, generating in the target OFDM carrier waves
The data interfering carrier that data subcarrier is interfered, wherein the data interfering carrier is according to the Pilot Interference carrier wave
OFDM modulation parameter contents be modulated, the data content in the data interfering carrier and the number in the OFDM carrier waves
It is different according to the data content in subcarrier.
13. device according to claim 9, which is characterized in that further include：
Temporal aspect acquisition module, for obtaining the target OFDM carrier waves from the carrier content in the target OFDM carrier waves
Temporal aspect, the transmission opportunity that the OFDM carrier waves transmitting terminal sends target OFDM carrier waves is described in the temporal aspect.
14. the device according to claim 10 or 13, which is characterized in that the interfering carrier sending module includes：
Noise jamming carrier wave sending module, for sending the same of target OFDM carrier waves next time in the OFDM carrier waves transmitting terminal
When, generation and the pilot sub-carrier are had into identical traffic frequency, to the pilot sub-carrier in the target OFDM carrier waves
The noise jamming carrier wave interfered is sent to OFDM carrier wave receiving terminals.
15. the device according to claim 11 or 13, which is characterized in that the interfering carrier sending module includes：
Pilot Interference carrier wave sending module, for before the OFDM carrier waves transmitting terminal sends target OFDM carrier waves next time,
Generation had into identical OFDM modulation parameters type, different OFDM modulation parameters contents from the pilot sub-carrier, to described
The Pilot Interference carrier wave that pilot sub-carrier in target OFDM carrier waves is interfered is sent to OFDM carrier wave receiving terminals.
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| CN201710256881.7A CN108737043A (en) | 2017-04-19 | 2017-04-19 | A kind of carrier wave generation method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710256881.7A CN108737043A (en) | 2017-04-19 | 2017-04-19 | A kind of carrier wave generation method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111800216A (en) * | 2020-05-29 | 2020-10-20 | 中南民族大学 | System and method for generating anti-electromagnetic waveform of unmanned aerial vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110059689A1 (en) * | 2009-09-04 | 2011-03-10 | Comhouse Wireless, Lp | Using code channel overrides to suppress CDMA wireless devices |
| CN103001906A (en) * | 2011-09-13 | 2013-03-27 | 清华大学 | TDS-OFDM (time domain synchronous-orthogonal frequency division multiplexing) interfering signal generation method |
| CN103684652A (en) * | 2013-12-05 | 2014-03-26 | 中国科学院信息工程研究所 | Signal shielding method suitable for LTE system |
| CN103856242A (en) * | 2012-11-30 | 2014-06-11 | 李祥明 | Power-line communication interference devices |
| CN106161314A (en) * | 2015-03-31 | 2016-11-23 | 中国移动通信集团公司 | Wireless signal interference method and device |
-
2017
- 2017-04-19 CN CN201710256881.7A patent/CN108737043A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110059689A1 (en) * | 2009-09-04 | 2011-03-10 | Comhouse Wireless, Lp | Using code channel overrides to suppress CDMA wireless devices |
| CN103001906A (en) * | 2011-09-13 | 2013-03-27 | 清华大学 | TDS-OFDM (time domain synchronous-orthogonal frequency division multiplexing) interfering signal generation method |
| CN103856242A (en) * | 2012-11-30 | 2014-06-11 | 李祥明 | Power-line communication interference devices |
| CN103684652A (en) * | 2013-12-05 | 2014-03-26 | 中国科学院信息工程研究所 | Signal shielding method suitable for LTE system |
| CN106161314A (en) * | 2015-03-31 | 2016-11-23 | 中国移动通信集团公司 | Wireless signal interference method and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111800216A (en) * | 2020-05-29 | 2020-10-20 | 中南民族大学 | System and method for generating anti-electromagnetic waveform of unmanned aerial vehicle |
| CN111800216B (en) * | 2020-05-29 | 2021-07-20 | 中南民族大学 | System and method for generating anti-electromagnetic waveform of black-flying unmanned aerial vehicle |
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