CN117318858A - Channel interference suppression method, device, equipment and readable storage medium - Google Patents
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Abstract
The invention provides a channel interference suppression method, a device, equipment and a readable storage medium, and relates to the field of electromagnetic wave detection, wherein the method comprises the following steps: acquiring a first signal transmitted by signal transmitting equipment in a wireless communication system based on a channel; performing shift division processing on the first signal to obtain a bidirectional spectrum quotient signal; performing outlier processing on the bidirectional spectrum quotient signal to obtain a limited spectrum quotient signal; and extracting the characteristics of the amplitude-limited spectrum quotient signal to obtain a target signal. The embodiment of the invention can realize the suppression of the channel interference by processing the received signal in the wireless communication system.
Description
Technical Field
The present invention relates to the field of electromagnetic wave detection, and in particular, to a method, apparatus, device, and readable storage medium for suppressing channel interference.
Background
The channel interference suppression method is a general channel processing method in a signal semi-blind detection technology, and the signal semi-blind detection technology refers to that in a wireless communication system, according to part of information of a known signal, such as frequency points, bandwidth and the like, further information of the signal, such as a modulation mode, a coding mode, signal decoding and the like, is obtained by combining the statistical characteristics of the signal and related technologies.
In a communication system, due to the influence of a complex and variable wireless communication environment, the performance of the wireless communication system changes along with the change of a wireless channel, so that the channel processing of a received signal is an indispensable step. In a conventional cooperative communication scenario, the purpose of processing a channel is to recover and correct received data, so as to improve the performance of signal coherent detection, and generally, a channel estimation and equalization technology is adopted. Conventional channel estimation techniques are divided into two main categories, non-blind channel estimation and blind channel estimation. The non-blind channel estimation technology generally utilizes a pilot sequence or a training sequence to perform parameter estimation on a modeled channel model, and common methods include a channel estimation technology based on a least square method, a channel estimation technology of minimum mean square error, a decision-directed channel estimation technology, a maximum expected channel estimation technology and the like. The blind signal estimation technique uses the characteristics of the communication system or the received signal itself without using pilot frequency or training sequence, and obtains channel state information only by processing the received signal itself. Common blind channel estimation techniques include a blind channel estimation technique using higher-order statistical characteristics, a blind channel estimation technique using subspaces, and the like.
However, the field of signal semi-blind detection and resolution belongs to a non-cooperative communication scenario, in which the characteristics of the signal need to be acquired by using the statistical characteristics of the received signal due to too little prior information. However, the statistical characteristics of the signal and the statistical characteristics of the channel are often not decoupled, so that the complex and changeable channel environment can generate a channel effect on the statistical characteristics of the signal, thereby affecting the signal characteristics.
Disclosure of Invention
The invention aims to provide a channel interference suppression method, a device, equipment and a readable storage medium, which are used for solving the problem that a complex and changeable channel environment causes interference to signal statistics characteristics.
In order to solve the above technical problems, an embodiment of the present invention provides a method for suppressing channel interference, including:
acquiring a first signal transmitted by signal transmitting equipment in a wireless communication system based on a channel;
performing shift division processing on the first signal to obtain a bidirectional spectrum quotient signal;
performing outlier processing on the bidirectional spectrum quotient signal to obtain a limited spectrum quotient signal;
and extracting the characteristics of the amplitude-limited spectrum quotient signal to obtain a target signal.
Optionally, the performing shift division processing on the first signal to obtain a bidirectional spectrum quotient signal includes:
acquiring an initial frequency domain sequence and an initial data subcarrier index of the first signal;
performing Fourier transform on the initial frequency domain sequence to generate a target frequency domain sequence;
and carrying out shift division processing on the target frequency domain sequence and the initial data subcarrier index to obtain a bidirectional spectrum quotient signal.
Optionally, the performing shift division processing on the target frequency domain sequence and the initial data subcarrier index to obtain a bidirectional spectrum quotient signal includes:
performing left circular circumference shift calculation on the initial data subcarrier index to generate a first data subcarrier index;
dividing the target frequency domain sequence according to the initial data subcarrier index and the first data subcarrier index to generate a left spectrum quotient signal;
performing right circular circumference shift calculation on the initial data subcarrier index to generate a second data subcarrier index;
dividing the target frequency domain sequence according to the initial data subcarrier index and the second data subcarrier index to generate a right spectrum quotient signal;
and obtaining a bidirectional spectrum quotient signal according to the left spectrum quotient signal and the right spectrum quotient signal.
Optionally, the bi-directional spectrum quotient signal includes:
a first-order bi-directional spectral quotient signal or a Q-order bi-directional spectral quotient signal;
the first-order bidirectional spectrum quotient signal is obtained by performing shift division processing on the first signal once, the Q-order bidirectional spectrum quotient signal is obtained by performing shift division processing on the first signal for Q times, and Q is an integer larger than 1.
Optionally, the performing outlier processing on the bi-directional spectrum quotient signal to obtain a limited spectrum quotient signal includes:
acquiring position coordinates of symbol points on a constellation diagram of the bidirectional spectrum quotient signal and position coordinates of ideal points corresponding to the symbol points;
determining the symbol point with the distance from the ideal point being greater than a first threshold value as an outlier according to the position coordinates of the symbol point and the ideal point;
and screening and/or amplitude limiting the outliers to obtain the amplitude limiting spectrum quotient signal.
Optionally, the target signal includes a target quotient signal and a target quotient error signal;
the feature extraction of the limited spectrum quotient signal is performed to obtain a target signal, which comprises the following steps:
performing feature extraction by acquiring a module value of the amplitude-limited spectrum quotient signal to obtain a target spectrum quotient signal;
and carrying out minimum distance calculation on the amplitude-limited spectrum quotient signal according to the constellation diagram of the amplitude-limited spectrum quotient signal to obtain a target spectrum quotient error signal.
Optionally, performing minimum distance calculation on the limited spectrum quotient signal according to a constellation diagram of the limited spectrum quotient signal to obtain a target spectrum quotient error signal, including:
quadrature Amplitude Modulation (QAM) is carried out on the constellation diagram of the amplitude-limited spectral quotient signal to generate a spectral quotient constellation diagram;
and carrying out minimum Euclidean distance calculation on the amplitude limiting spectrum quotient signal and a symbol point in the spectrum quotient constellation diagram to obtain a target spectrum quotient error signal.
The embodiment of the invention also provides a channel interference suppression device, which comprises:
a first acquisition module, configured to acquire a first signal transmitted by a signal transmitting device in a wireless communication system based on a channel;
the first processing module is used for carrying out shift division processing on the first signal to obtain a bidirectional spectrum quotient signal;
the second processing module is used for performing outlier processing on the bidirectional spectrum quotient signal to obtain a limiting spectrum quotient signal;
and the characteristic extraction module is used for carrying out characteristic extraction on the amplitude limiting spectrum quotient signal to obtain a target signal.
The embodiment of the invention also provides a network device, which comprises: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor implements the channel interference suppression method as claimed in any one of the preceding claims.
The embodiment of the invention also provides a readable storage medium, which comprises: the readable storage medium has stored thereon a program which, when executed by a processor, implements the steps of the channel interference suppression method according to any one of the preceding claims.
The technical scheme of the invention has the following beneficial effects:
in the above scheme, the signal transmitting device in the wireless communication system acquires the first signal sent by the channel, because the channel interferes with the signal, the first signal needs to be subjected to channel interference suppression processing, firstly, the first signal is subjected to shift division to suppress the channel, a bidirectional spectrum quotient signal is obtained, then, the bidirectional spectrum quotient signal is subjected to amplitude limiting processing, the suppression effect on the channel is optimized, an amplitude limiting spectrum quotient signal is obtained, finally, the amplitude limiting spectrum quotient signal is subjected to feature extraction to obtain a target signal, and the feature extraction of the signal is realized.
Drawings
Fig. 1 is a flow chart of a method for suppressing channel interference according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a QPSK spectrum quotient constellation according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an M-QAM spectral quotient constellation according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a channel interference suppression device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments, but not all embodiments of the present invention. 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.
As shown in fig. 1, an embodiment of the present invention provides a method for suppressing channel interference, including:
step S101, a first signal sent by signal transmitting equipment in a wireless communication system based on a channel is acquired;
step S102, carrying out shift division processing on the first signal to obtain a bidirectional spectrum quotient signal;
step S103, performing outlier processing on the bidirectional spectrum quotient signal to obtain a limited spectrum quotient signal;
and step S104, extracting the characteristics of the amplitude-limited spectrum quotient signal to obtain a target signal.
In the embodiment of the present invention, the first signal is a signal in an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) system, and the OFDM signal is widely applied in a long term evolution (Long Term Evolution, LTE) scenario, a fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G) or a sixth generation mobile communication technology (6th Generation Mobile Communication Technology,6G), in a wireless communication system, a signal receiving device receives a first signal transmitted by a signal transmitting device, but because a transmission medium of the signal is a channel, the received first signal is interfered by the channel, so that the first signal is obtained, and the first signal is processed, so that the interference of the channel is reduced. Firstly, carrying out shift division processing on a first signal through an N-step shift bidirectional spectrum quotient signal generator to construct a bidirectional spectrum quotient signal, so that the suppression of channel interference can be realized, and N is an integer greater than or equal to 1; secondly, the two-way spectrum quotient signal is limited by processing the outlier of the two-way spectrum quotient signal, so that the limited spectrum quotient signal is obtained, and the inhibition effect on the channel can be optimized; finally, the characteristic extraction is carried out on the amplitude-limited spectrum quotient signal to obtain a target signal, so that the subsequent processing of the signal is facilitated.
Optionally, the performing shift division processing on the first signal to obtain a bidirectional spectrum quotient signal includes:
acquiring an initial frequency domain sequence and an initial data subcarrier index of the first signal;
performing Fourier transform on the initial frequency domain sequence to generate a target frequency domain sequence;
and carrying out shift division processing on the target frequency domain sequence and the initial data subcarrier index to obtain a bidirectional spectrum quotient signal.
In the embodiment of the present invention, step S102 is specifically described, and the present invention uses the channel frequency response similar characteristics of adjacent OFDM frequency domain signals to perform shift division processing on signals transmitted in one OFDM symbol time by using N shift bidirectional spectrum quotient signal generators, so as to construct bidirectional spectrum quotient signals.
Acquiring an initial frequency domain sequence and an initial data subcarrier index of each signal in the OFDM signal data domain, wherein:
kth OFDM signal s k The initial frequency domain sequence of (a) is: s is(s) k ＝[s k (0),s k (1),…,s k (I 1 -1)]Wherein I 1 To remove before circulationThe length of the OFDM symbol after the affixation;
the initial data subcarrier index ID is: id= [ ID (0), ID (1), …, ID (I) 2 -1)]Wherein I 2 Is the total number of data subcarriers.
Performing Fourier transform on the initial frequency domain sequence to generate a target frequency domain sequence, wherein:
for s k Fourier transform is performed to obtain:
obtaining s k Corresponding target frequency domain sequence S k The method comprises the following steps: s is S k ＝[S k (0),S k (1),…,S k (I 1 -1)]；
For the target frequency domain sequence S k And performing shift division processing on the initial data subcarrier index ID to obtain a bidirectional spectrum quotient signal.
In this embodiment, the frequency domain sequence of the first signal is subjected to fourier-like transformation, and then is subjected to shift and division operation, so that the generated signal is determined as a spectral quotient signal, and the left shift and the right shift are respectively performed in the subsequent shift process, so that the signal is determined as a bidirectional spectral quotient signal.
Optionally, the performing shift division processing on the target frequency domain sequence and the initial data subcarrier index to obtain a bidirectional spectrum quotient signal includes:
performing left circular circumference shift calculation on the initial data subcarrier index to generate a first data subcarrier index;
dividing the target frequency domain sequence according to the initial data subcarrier index and the first data subcarrier index to generate a left spectrum quotient signal;
performing right circular circumference shift calculation on the initial data subcarrier index to generate a second data subcarrier index;
dividing the target frequency domain sequence according to the initial data subcarrier index and the second data subcarrier index to generate a right spectrum quotient signal;
and obtaining a bidirectional spectrum quotient signal according to the left spectrum quotient signal and the right spectrum quotient signal.
In the embodiment of the present invention, a specific process of shift division is described, in a single carrier system, if a transmission signal of the single carrier system forms a cyclic characteristic, for example, a preamble sequence part is repeated, cyclic offset division is performed by using a channel frequency response autocorrelation characteristic, a signal sequence with a channel irrelevant characteristic is obtained, first, left cyclic shift and right cyclic shift are performed on an initial data subcarrier index, and division operation is performed on a target frequency domain sequence according to the shifted data subcarrier index and the initial subcarrier index, so as to generate a bidirectional spectrum quotient signal, and a right cyclic description is given below as an example:
performing right circular circumferential shift on the data on different data subcarriers, wherein the shift is N steps, and generating a second data subcarrier index ID rcs The method comprises the following steps: ID (identity) rcs ＝[id rcs (0),id rcs (1),…,id rcs (I 2 -1)]＝[id(I 2 -N),…,id(I 2 -1),id(0),…,id(I 2 -N-1)]；
Defining index pairs p of data subcarriers id The method comprises the following steps: p is p id ＝{id(i 2 ),id rcs (i 2 )}，(≤i 2 ≤I 2 -1)；
Defining cyclic right shift spectral quotient vectorsThe method comprises the following steps: />
Wherein,is the ith of (2) 2 Personal signal->Expressed as: />i 2 Is an integer greater than or equal to 0.
Similarly, a cyclic left shift spectral quotient vector is definedThe method comprises the following steps: />
Wherein,is the ith of (2) 2 Personal signal->Expressed as: />
Thus, a pair of bi-directional spectrum quotient signals can be obtained The first signal is divided by N steps of shift in the frequency domain, and has a suppression effect on channel interference.
Optionally, the bi-directional spectrum quotient signal includes:
a first-order bi-directional spectral quotient signal or a Q-order bi-directional spectral quotient signal;
the first-order bidirectional spectrum quotient signal is obtained by performing shift division processing on the first signal once, the Q-order bidirectional spectrum quotient signal is obtained by performing shift division processing on the first signal for Q times, and Q is an integer larger than 1.
In the embodiment of the present invention, the bi-directional spectrum quotient signal generated in step S102 may be first-order or higher-order, where a first-order bi-directional spectrum quotient signal is generated by performing a shift division process on the first signal, and the first-order bi-directional spectrum quotient signal is iteratively input into the N-step shift bi-directional spectrum quotient signal generator, so that a higher-order bi-directional spectrum quotient signal may be generated. The higher the order of the bidirectional spectrum quotient signal is, the stronger the channel interference elimination capability is, the lower the order of the bidirectional spectrum quotient signal is, the stronger the signal anti-dryness capability is, and the bidirectional spectrum quotient signal with the corresponding order can be generated according to actual requirements.
Optionally, the performing outlier processing on the bi-directional spectrum quotient signal to obtain a limited spectrum quotient signal includes:
acquiring position coordinates of symbol points on a constellation diagram of the bidirectional spectrum quotient signal and position coordinates of ideal points corresponding to the symbol points;
determining the symbol point with the distance from the ideal point being greater than a first threshold value as an outlier according to the position coordinates of the symbol point and the ideal point;
and screening and/or amplitude limiting the outliers to obtain the amplitude limiting spectrum quotient signal.
In the embodiment of the invention, in order to prevent the outliers from affecting the subsequent feature statistics, the outliers of the bidirectional spectrum quotient signal need to be processed. Firstly, a constellation diagram of a bidirectional spectrum quotient signal is obtained, the positions of symbol points on the constellation diagram and ideal points of the constellation diagram are compared, if the symbol points deviate from the ideal points by a certain threshold value, namely, the distance between the symbol points and the ideal points is larger than a first threshold value, the symbol points are determined to be outliers, and the bidirectional spectrum quotient signal is subjected to amplitude limiting processing through eliminating and/or amplitude limiting and/or threshold value converting of the outliers, so that the amplitude-limited spectrum quotient signal is obtained. The following description will take, as an example, the removal of outliers and the amplitude limitation of outliers:
the amplitude value in the bidirectional spectrum quotient signal exceeds the first amplitude value A max1 Is subjected to signal rejection, and the length of the spectrum quotient signal after rejection is I 3 Inputting the bi-directional spectrum quotient signal at the moment into a maximum output amplitude value of a second amplitude value A max2 After the amplitude limiter of (2), carrying out amplitude normalization processing to obtain a new bidirectional spectrum quotient signal S,wherein the method comprises the steps of，
Ith (i) 3 The individual elements are calculated as follows:
after repeating the operation on K OFDM symbols, the final amplitude-limited spectrum quotient signal is obtained, and the amplitude-limited spectrum quotient signal is in a sequence v r And v l Is expressed in the form of:
and s=ki 3 (K is an integer greater than 0);
the amplitude fluctuation of the processed signal is in a certain interval, so that the overlarge deviation between the constellation diagram of the amplitude limiting spectral quotient signal and an ideal constellation diagram is avoided.
Optionally, the target signal includes a target quotient signal and a target quotient error signal;
the feature extraction of the limited spectrum quotient signal is performed to obtain a target signal, which comprises the following steps:
performing feature extraction by acquiring a module value of the amplitude-limited spectrum quotient signal to obtain a target spectrum quotient signal;
and carrying out minimum distance calculation on the amplitude-limited spectrum quotient signal according to the constellation diagram of the amplitude-limited spectrum quotient signal to obtain a target spectrum quotient error signal.
In the embodiment of the invention, the finally obtained target signal is explained, the amplitude-limited spectrum quotient signal is subjected to the modulus value taking process and the error calculating process respectively, and the target spectrum quotient signal and the target spectrum quotient error signal are obtained, wherein the two target signals define corresponding spectrum quotient constellation symbols according to different modulation formats, and the two target signals can be conveniently converted into other signal robust representation in the preprocessing of the subsequent signals through two channel robust signal representation modes. And the subsequent moment feature extraction of different orders and different combinations of the signals is facilitated, and the channel interference is restrained.
Optionally, performing minimum distance calculation on the limited spectrum quotient signal according to a constellation diagram of the limited spectrum quotient signal to obtain a target spectrum quotient error signal, including:
quadrature Amplitude Modulation (QAM) is carried out on the constellation diagram of the amplitude-limited spectral quotient signal to generate a spectral quotient constellation diagram;
and carrying out minimum Euclidean distance calculation on the amplitude limiting spectrum quotient signal and a symbol point in the spectrum quotient constellation diagram to obtain a target spectrum quotient error signal.
In the embodiment of the invention, a specific mode of obtaining a target spectrum quotient error signal is described, a spectrum quotient constellation diagram of a limited spectrum quotient signal is generated through quadrature amplitude modulation, and minimum Euclidean distance calculation is carried out on symbol points in the spectrum quotient constellation diagram, so as to obtain the target spectrum quotient error signal, and the symbol concept of the spectrum quotient constellation diagram is defined as follows in the embodiment of the invention: note that the symbol set of the constellation under multilevel quadrature amplitude modulation (Multilevel Quadrature Amplitude Modulation, M-QAM) is q= { Q 1 ,q 2 ,…,q m ,q M }, where q m Is complex, a two-dimensional space d= { (q) can be generated 1 ,q 2 ) }. Let f: d→p defines a bivariate function:
wherein P is a collection of M-QAM's spectral quotient constellation symbols, P ε P, defining P for accurate description of the spectral quotient signal accuracy measure in its constellation r And p l Is the vector after the minimum Euclidean distance is performed between each spectrum quotient signal and the constellation diagram symbol P of the spectrum quotient, and the nth element P thereof r (n) and P l (n) are respectively: p (P) r (n)＝argmin p∈P |v r (n)-p|；P l (n)＝argmin p∈P |v l (n)-p|；
Then the spectral quotient constellation error vector e r And e l The method comprises the following steps: e, e r ＝v r -P r ；e l ＝v l -P l ；
Target spectral quotient error signalAnd->The method comprises the following steps: />
It should be noted that, as shown in the spectral quotient constellations in fig. 2 and fig. 3, the spectral quotient constellations generated in the quadrature phase shift keying (Quadrature Phase Shift Keying, QPSK) and M-QAM modes can be intuitively seen, where the spectral quotient constellation symbols in the embodiment are the conversion of M-QAM symbols, no new error loss is introduced, the change between the spectral quotient signal and the spectral quotient constellation symbols can be attributed to the mixed effect of the transmitter impairment and the interference, and the QPSK spectral quotient constellation in fig. 2 is an ideal constellation, and can be used to extract the error caused by the equipment impairment in the spectral quotient signal, so the method described in the embodiment does not affect the subsequent feature extraction, and can suppress the fast-varying unknown channel effect.
As shown in fig. 4, an embodiment of the present invention further provides a channel interference suppression device, including:
a first obtaining module 401, configured to obtain a first signal sent by a signal transmitting device in a wireless communication system based on a channel;
a first processing module 402, configured to perform shift division processing on the first signal to obtain a bidirectional spectrum quotient signal;
a second processing module 403, configured to perform outlier processing on the bidirectional spectrum quotient signal to obtain a limited spectrum quotient signal;
and the feature extraction module 404 is configured to perform feature extraction on the limited spectrum quotient signal to obtain a target signal.
Optionally, the first processing module 402 includes:
a first obtaining unit, configured to obtain an initial frequency domain sequence and an initial data subcarrier index of the first signal;
the first processing unit is used for carrying out Fourier transform on the initial frequency domain sequence to generate a target frequency domain sequence;
and the second processing unit is used for carrying out shift division processing on the target frequency domain sequence and the initial data subcarrier index to obtain a bidirectional spectrum quotient signal.
Optionally, the second processing unit includes:
the third processing unit is used for performing left circular circumference shift calculation on the initial data subcarrier index to generate a first data subcarrier index;
the fourth processing unit is used for carrying out division calculation on the target frequency domain sequence according to the initial data subcarrier index and the first data subcarrier index to generate a left spectrum quotient signal;
a fifth processing unit, configured to perform right circular shift calculation on the initial data subcarrier index, and generate a second data subcarrier index;
a sixth processing unit, configured to perform division calculation on the target frequency domain sequence according to the initial data subcarrier index and the second data subcarrier index, and generate a right-direction spectrum quotient signal;
the second acquisition unit is used for acquiring a bidirectional spectrum quotient signal according to the left spectrum quotient signal and the right spectrum quotient signal.
Optionally, the bi-directional spectrum quotient signal obtained in the first processing module 402 includes:
a first-order bi-directional spectral quotient signal or a Q-order bi-directional spectral quotient signal;
the first-order bidirectional spectrum quotient signal is obtained by performing shift division processing on the first signal once, the Q-order bidirectional spectrum quotient signal is obtained by performing shift division processing on the first signal for Q times, and Q is an integer larger than 1.
Optionally, the second processing module 403 includes:
a third obtaining unit, configured to obtain a position coordinate of a symbol point on the constellation diagram of the bidirectional spectrum quotient signal and a position coordinate of an ideal point corresponding to the symbol point;
a first determining unit configured to determine, as an outlier, the symbol point having a distance from the ideal point greater than a first threshold value, based on position coordinates of the symbol point and the ideal point;
and the seventh processing unit is used for screening out the outliers and/or performing amplitude limiting processing to obtain the amplitude limiting spectrum quotient signal.
Optionally, the target signal obtained in the feature extraction module 404 includes a target spectral quotient signal and a target spectral quotient error signal;
the feature extraction module 404 includes:
the first feature extraction unit is used for extracting features by acquiring the modulus value of the amplitude limiting spectrum quotient signal to obtain a target spectrum quotient signal;
and the second feature extraction unit is used for carrying out minimum distance calculation on the amplitude limiting spectrum quotient signal according to the constellation diagram of the amplitude limiting spectrum quotient signal to obtain a target spectrum quotient error signal.
Optionally, the second feature extraction unit includes:
an eighth processing unit, configured to perform quadrature amplitude modulation QAM on the constellation of the limited spectrum quotient signal, to generate a spectrum quotient constellation;
and a ninth processing unit, configured to perform minimum euclidean distance calculation on the limited spectrum quotient signal and a symbol point in the spectrum quotient constellation diagram, so as to obtain a target spectrum quotient error signal.
It should be noted that, the embodiment of the apparatus is an apparatus corresponding to the embodiment of the method, and all implementation manners in the embodiment of the method are applicable to the embodiment of the apparatus, so that the same technical effects can be achieved.
The embodiment of the invention also provides a network device, which comprises: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor implements the channel interference suppression method as claimed in any one of the preceding claims.
The embodiment of the invention also provides a readable storage medium, which comprises: the readable storage medium has stored thereon a program which, when executed by a processor, implements the steps of the channel interference suppression method according to any one of the preceding claims.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A method of channel interference suppression, comprising:
acquiring a first signal transmitted by signal transmitting equipment in a wireless communication system based on a channel;
performing shift division processing on the first signal to obtain a bidirectional spectrum quotient signal;
performing outlier processing on the bidirectional spectrum quotient signal to obtain a limited spectrum quotient signal;
and extracting the characteristics of the amplitude-limited spectrum quotient signal to obtain a target signal.
2. The method of claim 1, wherein said performing a shift division process on said first signal to obtain a bi-directional spectral quotient signal comprises:
acquiring an initial frequency domain sequence and an initial data subcarrier index of the first signal;
performing Fourier transform on the initial frequency domain sequence to generate a target frequency domain sequence;
and carrying out shift division processing on the target frequency domain sequence and the initial data subcarrier index to obtain a bidirectional spectrum quotient signal.
3. The method of claim 2, wherein said shift division processing of the target frequency domain sequence and the initial data subcarrier index to obtain a bi-directional spectral quotient signal comprises:
performing left circular circumference shift calculation on the initial data subcarrier index to generate a first data subcarrier index;
dividing the target frequency domain sequence according to the initial data subcarrier index and the first data subcarrier index to generate a left spectrum quotient signal;
performing right circular circumference shift calculation on the initial data subcarrier index to generate a second data subcarrier index;
dividing the target frequency domain sequence according to the initial data subcarrier index and the second data subcarrier index to generate a right spectrum quotient signal;
and obtaining a bidirectional spectrum quotient signal according to the left spectrum quotient signal and the right spectrum quotient signal.
4. The method of claim 1, wherein the bi-directional spectral quotient signal comprises:
a first-order bi-directional spectral quotient signal or a Q-order bi-directional spectral quotient signal;
the first-order bidirectional spectrum quotient signal is obtained by performing shift division processing on the first signal once, the Q-order bidirectional spectrum quotient signal is obtained by performing shift division processing on the first signal for Q times, and Q is an integer larger than 1.
5. The method of claim 1, wherein said outlier processing said bi-directional spectral quotient signal to obtain a limited spectral quotient signal comprises:
acquiring position coordinates of symbol points on a constellation diagram of the bidirectional spectrum quotient signal and position coordinates of ideal points corresponding to the symbol points;
determining the symbol point with the distance from the ideal point being greater than a first threshold value as an outlier according to the position coordinates of the symbol point and the ideal point;
and screening and/or amplitude limiting the outliers to obtain the amplitude limiting spectrum quotient signal.
6. The method of claim 1, wherein the target signal comprises a target spectral quotient signal and a target spectral quotient error signal;
the feature extraction of the limited spectrum quotient signal is performed to obtain a target signal, which comprises the following steps:
performing feature extraction by acquiring a module value of the amplitude-limited spectrum quotient signal to obtain a target spectrum quotient signal;
and carrying out minimum distance calculation on the amplitude-limited spectrum quotient signal according to the constellation diagram of the amplitude-limited spectrum quotient signal to obtain a target spectrum quotient error signal.
7. The method of claim 6, wherein performing a minimum distance calculation on the limited-spectrum quotient signal based on a constellation diagram of the limited-spectrum quotient signal to obtain a target-spectrum quotient error signal, comprising:
quadrature Amplitude Modulation (QAM) is carried out on the constellation diagram of the amplitude-limited spectral quotient signal to generate a spectral quotient constellation diagram;
and carrying out minimum Euclidean distance calculation on the amplitude limiting spectrum quotient signal and a symbol point in the spectrum quotient constellation diagram to obtain a target spectrum quotient error signal.
8. A channel interference suppression apparatus, comprising:
a first acquisition module, configured to acquire a first signal transmitted by a signal transmitting device in a wireless communication system based on a channel;
the first processing module is used for carrying out shift division processing on the first signal to obtain a bidirectional spectrum quotient signal;
the second processing module is used for performing outlier processing on the bidirectional spectrum quotient signal to obtain a limiting spectrum quotient signal;
and the characteristic extraction module is used for carrying out characteristic extraction on the amplitude limiting spectrum quotient signal to obtain a target signal.
9. A network device, comprising: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor implements the channel interference suppression method according to any one of claims 1 to 7.
10. A readable storage medium, comprising: the readable storage medium has stored thereon a program which, when executed by a processor, implements the steps of the channel interference suppression method according to any one of claims 1 to 7.
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