CN116318474A - Interference processing method and device in wireless communication and electronic equipment - Google Patents
Interference processing method and device in wireless communication and electronic equipment Download PDFInfo
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Abstract
The invention provides an interference processing method, an interference processing device and electronic equipment in wireless communication, wherein the interference processing method comprises the following steps: receiving an information transmission frame, and extracting at least two pilot frequency segments in the information transmission frame; based on the two pilot frequency bands, carrying out noise estimation and channel estimation on the information transmission frame; the noise estimation is performed on a time domain, and the channel estimation is performed on a frequency domain; and judging whether the information transmission frame has interference or not based on the results of the noise estimation and the channel estimation. According to the invention, more accurate noise estimation and channel estimation are realized through at least two pilot frequency segments, and interference sensing is further realized through the combination of the results of the noise estimation and the channel estimation, so that whether interference exists can be accurately judged under the condition of not increasing algorithm complexity.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for processing interference in wireless communications, and an electronic device.
Background
In recent years, unmanned aerial vehicles are increasingly widely applied, including rescue and relief work, emergency communication, urban traffic management, relay networks, battlefield striking and the like, and the functions all need information transmission guarantee among unmanned aerial vehicles.
In unmanned aerial vehicle communication, frequency hopping communication technology is adopted to achieve the purpose of high anti-interference performance and high anti-interception secret communication. In urban environments, a large amount of interference of unintentional signals and enemy intentional signals is enriched, so that the communication reliability of the unmanned aerial vehicle is difficult to guarantee.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides an interference processing method, an interference processing device and electronic equipment in wireless communication.
The technical scheme of the invention provides an interference processing method in wireless communication, which comprises the following steps:
receiving an information transmission frame, and extracting at least two pilot frequency segments in the information transmission frame;
based on the two pilot frequency bands, carrying out noise estimation and channel estimation on the information transmission frame; the noise estimation is performed on a time domain, and the channel estimation is performed on a frequency domain;
and judging whether the information transmission frame has interference or not based on the results of the noise estimation and the channel estimation.
Optionally, the interference processing method further includes:
if the information transmission frame is judged to have interference, acquiring a result of channel estimation;
acquiring a frequency band with interference on a frequency domain based on the result of the channel estimation;
transforming the information transmission frame to a frequency domain, and carrying out frequency domain equalization aiming at the interference frequency band;
and transforming the information transmission frame after the frequency domain equalization to a time domain, and obtaining effective information after demodulation.
Optionally, transforming the information transmission frame to a frequency domain, and performing frequency domain equalization for the interfering frequency band, including:
and transforming the information transmission frame to a frequency domain, and setting the frequency domain amplitude of the information transmission frame to be zero aiming at the interference frequency band.
Optionally, based on the two pilot segments, performing noise estimation on the information transmission frame includes:
acquiring a difference sequence of the two pilot frequency segments based on the two pilot frequency segments;
conjugation is carried out on the difference sequence, and a conjugated sequence is obtained;
multiplying the difference sequence and the conjugate sequence to obtain a plurality of products;
and taking an average value of the products as a result of the noise estimation.
Optionally, based on the results of the noise estimation and the channel estimation, determining whether the information transmission frame has interference includes:
and if the result of the noise estimation exceeds a first threshold value, judging that the information transmission frame has interference.
Optionally, based on the two pilot segments, performing channel estimation on the information transmission frame includes:
based on the two pilot frequency bands, obtaining a response corresponding to the local pilot frequency through coupling and interpolation calculation;
dividing the response converted to the frequency domain by the local pilot converted to the frequency domain, and obtaining a quotient as a result of the channel estimation.
Optionally, based on the two pilot frequency segments, obtaining a response corresponding to the local pilot frequency through coupling and interpolation calculation includes:
the two pilot frequency segments comprise a first pilot frequency segment and a second pilot frequency segment, and pilot frequency values of transmitting ends corresponding to the first pilot frequency segment and the second pilot frequency segment are opposite; the local pilot frequency is equal to the pilot frequency value of the transmitting end corresponding to the first pilot frequency segment;
and subtracting the second pilot frequency segment from the first pilot frequency segment to obtain a difference value, and dividing the difference value by two to obtain a quotient serving as a response corresponding to the local pilot frequency.
Optionally, based on the results of the noise estimation and the channel estimation, determining whether the information transmission frame has interference includes:
and if the result of the channel estimation exceeds a second threshold value, judging that the information transmission frame has interference.
Optionally, the information transmission frame is formed by interweaving codes;
correspondingly, transforming the information transmission frame after frequency domain equalization to a time domain, and obtaining effective information after demodulation comprises:
and transforming the information transmission frame after the frequency domain equalization to a time domain, and performing de-interleaving decoding processing to obtain effective information.
The technical scheme of the invention also provides a frequency hopping communication method, which comprises the following steps:
each time a communication is performed on a selected carrier frequency, a step of an interference processing method in the wireless communication is adopted.
The technical scheme of the invention also provides an interference processing device in wireless communication, which comprises:
the receiving module is used for receiving the information transmission frame and extracting at least two pilot frequency segments in the information transmission frame;
the estimation module is used for carrying out noise estimation and channel estimation on the information transmission frame based on the two guide frequency bands; the noise estimation is performed on a time domain, and the channel estimation is performed on a frequency domain;
and the judging module is used for judging whether the information transmission frame has interference or not based on the results of the noise estimation and the channel estimation.
The technical scheme of the invention also provides electronic equipment, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the steps of the interference processing method in wireless communication according to any one of the above steps or realizes the frequency hopping communication method according to any one of the above steps when executing the program.
The technical scheme of the invention also provides an unmanned aerial vehicle, which comprises the electronic equipment.
The technical solution of the present invention further provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the interference processing method in wireless communication according to any one of the above, or implements the frequency hopping communication method according to any one of the above.
According to the interference processing method, the device and the electronic equipment in the wireless communication, more accurate noise estimation and channel estimation are realized through at least two pilot frequency segments, interference sensing is further realized through the combination of the results of the noise estimation and the channel estimation, and whether interference exists can be accurately judged under the condition that algorithm complexity is not increased.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following brief description will be given of the drawings used in the embodiments or the description of the prior art, it being obvious that the drawings in the following description are some embodiments of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of an interference processing method in wireless communication according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a distributed pilot insertion method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of an interference cancellation method when a data receiving method of frame synchronization is adopted in an embodiment of the present invention;
FIG. 4 is a schematic diagram of bit error rates at different signal to noise ratios after deleting 10%, 20% and 30% of information in a QPSK+packet interleaving+LDPC system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of bit error rates at different signal to noise ratios after deleting 10%, 20% and 30% of information in a QPSK+random interleaving+LDPC system according to an embodiment of the present invention;
FIG. 6 is a flow chart of a pilot-based noise estimation algorithm according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a noise estimation result after adding a single tone with an interference ratio of 30dB, a 1MHz narrow band, and a 10MHz wide band without adding interference in the embodiment of the invention;
fig. 8 is a flow chart of channel estimation according to an embodiment of the present invention;
fig. 9 is a channel estimation result of a 6-path 5 microsecond multipath channel according to an embodiment of the present invention;
FIG. 10 shows a channel estimation result after adding a narrowband interference with a interference signal to interference ratio of 30dB and a bandwidth of 1MHz according to an embodiment of the present invention;
fig. 11 is a schematic diagram of an interference processing apparatus in wireless communication according to an embodiment of the present invention;
fig. 12 is a schematic diagram of an entity structure of an electronic device according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The interference processing method in wireless communication provided by the embodiment of the invention is described in detail below through specific embodiments and application scenarios thereof with reference to the accompanying drawings.
In an embodiment of the present invention, fig. 1 is a flow chart of an interference processing method in wireless communication according to an embodiment of the present invention, and as shown in fig. 1, the interference processing method in wireless communication may include the following steps:
s100, receiving an information transmission frame, and extracting at least two pilot frequency segments in the information transmission frame.
S200, carrying out noise estimation and channel estimation on an information transmission frame based on two guide frequency bands; the noise estimation is performed in the time domain and the channel estimation is performed in the frequency domain.
S300, judging whether the information transmission frame has interference or not based on the results of noise estimation and channel estimation.
When high-power and large-bandwidth interference falls in a signal band, obvious abnormality occurs in a channel estimation result, and meanwhile, a noise estimation result is also obviously increased. Channel estimation and noise estimation results are obtained, and interference can be accurately captured under the condition of not increasing algorithm complexity by taking the channel estimation and noise estimation results as joint detection basis.
In this embodiment, the information transmission frame may be formed by an interleaving encoding method.
Correspondingly, transforming the information transmission frame after the frequency domain equalization to the time domain, and obtaining effective information after demodulation comprises the following steps:
and transforming the information transmission frame after the frequency domain equalization into a time domain, and performing de-interleaving decoding processing to obtain effective information.
As an alternative pilot frequency programming method, fig. 2 is a schematic diagram of a distributed pilot frequency inserting manner according to an embodiment of the present invention, as shown in fig. 2, 2 segments of distributed pilot frequencies are inserted before an information frame, and the pilot frequencies are separated by a Cyclic Prefix (CP).
By adopting the combined detection method of the peak detection of the channel estimation and the mean detection of the noise estimation, the interference sensing based on the channel estimation and the noise estimation can be accurately realized under the fading interference channel of the complex environment.
In an embodiment of the present invention, in order to further delete perceived interference, the interference processing method further includes:
if the interference exists in the information transmission frame, a channel estimation result is obtained;
acquiring a frequency band with interference on a frequency domain based on a channel estimation result;
transforming the information transmission frame to a frequency domain, and carrying out frequency domain equalization aiming at the interference frequency band;
and transforming the information transmission frame after the frequency domain equalization into a time domain, and demodulating to obtain effective information.
The method for transforming the information transmission frame to the frequency domain and carrying out frequency domain equalization aiming at the interference frequency band comprises the following steps:
the information transmission frame is transformed to the frequency domain, and the frequency domain amplitude of the information transmission frame is set to be zero for the frequency band of interference.
Of course, frequency domain equalization is performed on the frequency band of interference, the frequency domain amplitude of the frequency band of interference is not necessarily set to be zero, and the effect of interference deletion or interference suppression can be achieved by controlling the frequency domain amplitude to be similar to the amplitude of other non-interference frequency bands.
In this embodiment, further, if a frame synchronization data receiving method is adopted, fig. 3 is a flow chart of an interference deleting method when the frame synchronization data receiving method is adopted, as shown in fig. 3, after the received information frames are synchronized, noise estimation and channel estimation are respectively performed based on pilot frequency, interference detection is implemented by combining a mean detection result of the noise estimation and a peak detection result of the channel estimation, and the interference detection result assists in performing interference deletion on the information transmission frames after fourier transformation.
It should be noted that the present invention is not limited to the application to the frame synchronous data receiving method, and may be applied to the frame asynchronous data receiving method.
Fig. 4 is a schematic diagram of bit error rates at different signal to noise ratios after 10%, 20% and 30% of information is deleted by a qpsk+packet interleaving+ldpc system according to an embodiment of the present invention, and fig. 5 is a schematic diagram of bit error rates at different signal to noise ratios after 10%, 20% and 30% of information is deleted by a qpsk+random interleaving+ldpc system according to an embodiment of the present invention, it should be noted that QPSK is a digital modulation scheme, which represents quadrature phase shift keying (Quadrature Phase Shift Keying, QPSK), eb/NO represents energy per bit divided by noise power spectral density, and, as shown in fig. 4 and 5, although some useful information is deleted while interference is deleted, information accuracy after decoding can still be guaranteed for less than 20% of information, and performance rollback is less than 2db@1e-5.
In this embodiment, based on the technology of multi-carrier direct sequence spread spectrum code division multiple access, in combination with the frame structure information of the short frame burst signal, by applying the foregoing interference processing method in the subcarriers and then combining the hierarchical merging method between the subcarriers, the demodulation result can utilize the information loaded on each subcarrier to the greatest extent, thereby improving the interference suppression tolerance and improving the performance of the communication link.
In an embodiment of the present invention, the noise estimation can employ a method of acquiring the noise variance estimation value.
Based on the two pilot frequency bands, noise estimation on the information transmission frame is performed, including:
acquiring a difference sequence of the two guide frequency bands based on the two guide frequency bands;
conjugation is carried out on the difference value sequence, and a conjugated sequence is obtained;
multiplying the difference sequence and the conjugate sequence to obtain a plurality of products;
an average of the plurality of products is taken as a result of the noise estimation.
Based on the results of the noise estimation and the channel estimation, determining whether the information transmission frame has interference includes:
if the result of the noise estimation exceeds a first threshold, judging that the information transmission frame has interference.
The first threshold value is dynamically changed for the time-varying channel, and is adaptively changed by the magnitude of the received power.
Further, a method of noise estimation is described using a mathematical expression:
fig. 6 is a flow chart of a noise estimation algorithm based on pilot frequency according to an embodiment of the present invention, as shown in fig. 6, if two pilot frequency segments are assumed to be at a transmitting end, the 1 st pilot frequency sequence is sh (n), n=0, …, NFFT-1, the 2 nd pilot frequency sequence is st (n), n=0, …, NFFT-1, where NFFT represents the number of frequency sampling points. sh (n) and st (n) are ZC (Zaddoff Chu) sequences with identical amplitude and phase. The sequences rh (n) and rt (n) that the two pilots sent by the transmitting end reach the receiving end after passing through the time-varying multipath channel can be expressed as follows.
In the above formula, h1 (n) and h2 (n) are channel time domain responses,
representing the multiplication, v1 (n) and v2 (n) represent the additive white Gaussian noise of the channel with variance +.>
In the coherence time of the channel, the variation of h1 (n) and h2 (n) is relatively small, and then the subtraction of the two received pilot segments can be obtained:
r noise (n)＝r h (n)-r t (n)＝v 1 (n)-v 2 (n)
due to v 1 (n) and v 2 (n) is Gaussian white noise of the channel, v is set 1 (n) mean value of mu 1 Variance is sigma 1 2 ，v 2 (n) mean value of mu 2 Variance is sigma 2 2 Then μ can be approximated as μ within the coherence time of the channel 1 ＝μ 2 ，σ 1 2 ＝σ 2 2 . For two independent co-distributed Gaussian random variables, v is subtracted 1 (n)-v 2 (n) is still a Gaussian random variable with average value of μ 1 -μ 2 Variance is
The noise variance estimate is further obtained as follows.
Wherein [ r noise (n)] * Representing conjugation to rnoise (n).
The noise estimation result is extremely sensitive to interference, and a powerful guarantee is provided for channel monitoring. Fig. 7 is a schematic diagram of a noise estimation result without interference after adding a single tone with an interference-to-signal ratio of 30dB, a narrow band of 1MHz, and a wide band of 10MHz according to an embodiment of the present invention, wherein the ordinate in fig. 7 represents the received power, and the abscissa represents the signal-to-noise ratio, as shown in fig. 7, the noise estimation result is smaller when no interference and single tone interference are present, and has a large amplification when encountering stop band interference.
In the embodiment of the invention, the channel estimation realizes high-precision frequency domain channel estimation through two guide frequency bands and a local guide frequency.
Based on the two pilot frequency bands, performing channel estimation on the information transmission frame includes:
based on the two pilot frequency bands, obtaining a response corresponding to the local pilot frequency through coupling and interpolation calculation;
the response converted to the frequency domain is divided by the local pilot converted to the frequency domain, and the quotient obtained is the result of channel estimation.
Based on the two pilot frequency bands, obtaining a response corresponding to the local pilot frequency through coupling and interpolation calculation comprises the following steps:
the two pilot frequency segments comprise a first pilot frequency segment and a second pilot frequency segment, and pilot frequency values of the transmitting ends corresponding to the first pilot frequency segment and the second pilot frequency segment are opposite; the pilot frequency values of the local pilot frequency and the corresponding transmitting end of the first pilot frequency segment are equal;
subtracting the second pilot frequency segment from the first pilot frequency segment to obtain a difference value, and dividing the difference value by two to obtain a quotient serving as a response corresponding to the local pilot frequency.
Based on the results of the noise estimation and the channel estimation, determining whether the information transmission frame has interference includes:
and if the result of the channel estimation exceeds a second threshold value, judging that the information transmission frame has interference.
The second threshold value is dynamically changed for the time-varying channel, and is adaptively changed by the magnitude of the received power.
Further, a method of channel estimation is described using a mathematical expression:
fig. 8 is a channel estimation flow chart according to an embodiment of the present invention, as shown in fig. 8, assuming that a sequence of a transmitting end corresponding to a first pilot segment is x + (n) the sequence data of the transmitting end corresponding to the second pilot segment is assumed to be x contrary to the first pilot segment - (n)＝-x + (n) let the multipath channel be h (n) and the noise be v, two corresponding pilot signals y are received at the receiving end + (n) and y - (n) is represented by the formula:
based on the received signal, the channel can be estimated in the frequency domain
The method comprises the following steps:
wherein the FFT representation is fourier transformed to the frequency domain. Since double-length pilot estimation is adopted, high-precision channel estimation can be realized.
Fig. 9 is a channel estimation result of a 6-path 5 microsecond multipath channel according to an embodiment of the present invention, fig. 10 is a channel estimation result after adding a narrowband interference with a interference signal to interference ratio of 30dB and a bandwidth of 1MHz according to an embodiment of the present invention, it should be noted that, an abscissa in fig. 9 and 10 represents a frequency sampling point, and an ordinate represents an estimated frequency domain channel
As shown in fig. 9 and 10, the interference in fig. 10 occurs at both sides, the peak of which is much larger than that of the middle normal signal, and the interference channel occursThe peak point is extremely large, the peak difference with the multipath channel is obvious, and the multipath channel is not submerged under the multipath estimation result. By monitoring the peak value of the channel estimation result, the interfered frequency point in the frequency hopping system can be accurately identified.
The interference processing apparatus in wireless communication provided by the present invention will be described below, and the interference processing apparatus in wireless communication described below and the interference processing method in wireless communication described above may be referred to correspondingly to each other.
Fig. 11 is a schematic diagram of an apparatus for processing interference in wireless communication according to an embodiment of the present invention, as shown in fig. 11, where the apparatus for processing interference in wireless communication provided by the technical solution of the present invention includes:
the receiving module is used for receiving the information transmission frame and extracting at least two pilot frequency segments in the information transmission frame;
the estimation module is used for carrying out noise estimation and channel estimation on the information transmission frame based on the two pilot frequency segments; noise estimation is performed in the time domain and channel estimation is performed in the frequency domain;
and the judging module is used for judging whether the information transmission frame has interference or not based on the results of the noise estimation and the channel estimation.
According to the embodiment, more accurate noise estimation and channel estimation are realized through at least two pilot frequency segments, interference sensing is further realized through the combination of the results of the noise estimation and the channel estimation, and whether interference exists can be accurately judged under the condition that algorithm complexity is not increased.
In an embodiment of the present invention, there is also provided a frequency hopping communication method, including:
the step of the interference processing method in the wireless communication is adopted each time communication is performed on the selected carrier frequency.
In the prior art, after the interference frequency band is found, the interference frequency band is not selected as the working frequency band, and the method is difficult to be applied when the communication frequency band resources are tense.
Fig. 12 is a schematic physical structure of an electronic device according to the present invention, where, as shown in fig. 12, the electronic device may include: processor 810, communication interface (Communications Interface) 820, memory 830, and communication bus 840, wherein processor 810, communication interface 820, memory 830 accomplish communication with each other through communication bus 840. The processor 810 may invoke logic instructions in the memory 830 to perform an interference handling method in wireless communication, the interference handling method comprising:
receiving an information transmission frame, and extracting at least two pilot frequency segments in the information transmission frame;
based on the two pilot frequency bands, carrying out noise estimation and channel estimation on the information transmission frame; the noise estimation is performed on a time domain, and the channel estimation is performed on a frequency domain;
and judging whether the information transmission frame has interference or not based on the results of the noise estimation and the channel estimation.
Further, the logic instructions in the memory 830 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The technical scheme of the invention also provides the unmanned aerial vehicle, which comprises the electronic equipment. And the anti-interference algorithm based on frequency domain equalization interleaving interference deletion is used for dynamically sensing and interleaving interference in channels under fading interference channels in complex environments such as cities, so that the anti-interference capability of unmanned aerial vehicle communication is improved, and the reliability of information transmission is ensured.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform a method of interference handling in wireless communications provided by the above methods, the method of interference handling comprising:
receiving an information transmission frame, and extracting at least two pilot frequency segments in the information transmission frame;
based on the two pilot frequency bands, carrying out noise estimation and channel estimation on the information transmission frame; the noise estimation is performed on a time domain, and the channel estimation is performed on a frequency domain;
and judging whether the information transmission frame has interference or not based on the results of the noise estimation and the channel estimation.
In still another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the above-provided interference processing method in wireless communication, the interference processing method comprising:
receiving an information transmission frame, and extracting at least two pilot frequency segments in the information transmission frame;
based on the two pilot frequency bands, carrying out noise estimation and channel estimation on the information transmission frame; the noise estimation is performed on a time domain, and the channel estimation is performed on a frequency domain;
and judging whether the information transmission frame has interference or not based on the results of the noise estimation and the channel estimation.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. A method of interference handling in wireless communications, the method comprising:
receiving an information transmission frame, and extracting at least two pilot frequency segments in the information transmission frame;
based on the two pilot frequency bands, carrying out noise estimation and channel estimation on the information transmission frame; the noise estimation is performed on a time domain, and the channel estimation is performed on a frequency domain;
and judging whether the information transmission frame has interference or not based on the results of the noise estimation and the channel estimation.
2. The interference processing method in wireless communication according to claim 1, wherein the interference processing method further comprises:
if the information transmission frame is judged to have interference, acquiring a result of channel estimation;
acquiring a frequency band with interference on a frequency domain based on the result of the channel estimation;
transforming the information transmission frame to a frequency domain, and carrying out frequency domain equalization aiming at the interference frequency band;
and transforming the information transmission frame after the frequency domain equalization to a time domain, and obtaining effective information after demodulation.
3. The method of processing interference in wireless communication according to claim 2, wherein transforming the information transmission frame to a frequency domain, and performing frequency domain equalization for the frequency band of the interference, comprises:
and transforming the information transmission frame to a frequency domain, and setting the frequency domain amplitude of the information transmission frame to be zero aiming at the interference frequency band.
4. The method according to claim 1, wherein performing noise estimation for the information transmission frame based on the two pilot segments comprises:
acquiring a difference sequence of the two pilot frequency segments based on the two pilot frequency segments;
conjugation is carried out on the difference sequence, and a conjugated sequence is obtained;
multiplying the difference sequence and the conjugate sequence to obtain a plurality of products;
and taking an average value of the products as a result of the noise estimation.
5. The method according to claim 4, wherein determining whether the information transmission frame has interference based on the results of the noise estimation and the channel estimation, comprises:
and if the result of the noise estimation exceeds a first threshold value, judging that the information transmission frame has interference.
6. The method according to claim 1, wherein performing channel estimation for the information transmission frame based on the two pilot segments comprises:
based on the two pilot frequency bands, obtaining a response corresponding to the local pilot frequency through coupling and interpolation calculation;
dividing the response converted to the frequency domain by the local pilot converted to the frequency domain, and obtaining a quotient as a result of the channel estimation.
7. The method of interference processing in wireless communication according to claim 6, wherein obtaining a response corresponding to a local pilot through coupling and interpolation calculation based on the two pilot segments, comprises:
the two pilot frequency segments comprise a first pilot frequency segment and a second pilot frequency segment, and pilot frequency values of transmitting ends corresponding to the first pilot frequency segment and the second pilot frequency segment are opposite; the local pilot frequency is equal to the pilot frequency value of the transmitting end corresponding to the first pilot frequency segment;
and subtracting the second pilot frequency segment from the first pilot frequency segment to obtain a difference value, and dividing the difference value by two to obtain a quotient serving as a response corresponding to the local pilot frequency.
8. The method according to claim 7, wherein determining whether the information transmission frame has interference based on the results of the noise estimation and the channel estimation, comprises:
and if the result of the channel estimation exceeds a second threshold value, judging that the information transmission frame has interference.
9. The interference processing method in wireless communication according to claim 2, wherein the information transmission frame is formed by an interleaving code;
correspondingly, transforming the information transmission frame after frequency domain equalization to a time domain, and obtaining effective information after demodulation comprises:
and transforming the information transmission frame after the frequency domain equalization to a time domain, and performing de-interleaving decoding processing to obtain effective information.
10. A frequency hopping communication method, characterized in that the frequency hopping communication method comprises:
the method for interference handling in wireless communication according to any of claims 1-9 being adapted each time a communication is performed on a selected carrier frequency.
11. An interference handling apparatus in wireless communications, the apparatus comprising:
the receiving module is used for receiving the information transmission frame and extracting at least two pilot frequency segments in the information transmission frame;
the estimation module is used for carrying out noise estimation and channel estimation on the information transmission frame based on the two guide frequency bands; the noise estimation is performed on a time domain, and the channel estimation is performed on a frequency domain;
and the judging module is used for judging whether the information transmission frame has interference or not based on the results of the noise estimation and the channel estimation.
12. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the interference handling method in wireless communication according to any of claims 1-9 or the frequency hopping communication method according to claim 10 when the program is executed.
13. A drone, characterized in that it comprises the electronic device of claim 12.
14. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed by a processor implements the steps of the interference handling method in wireless communication according to any of claims 1-9 or implements the frequency hopping communication method according to claim 10.
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