CN106034091A - Detection method and device - Google Patents
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- CN106034091A CN106034091A CN201510111908.4A CN201510111908A CN106034091A CN 106034091 A CN106034091 A CN 106034091A CN 201510111908 A CN201510111908 A CN 201510111908A CN 106034091 A CN106034091 A CN 106034091A
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Abstract
The invention discloses a detection method and device, which solve a problem that system performance can be decreased due to a fact that a single detection algorithm is adopted on a PRB of a PDSCH or a PUSCH. The detection method comprises steps of determining a physical resource block having interference and a physical resource block having no interference in a scheduled physical resource, for the physical resource block having no interference, adopting a detection algorithm which does not process the interference to obtain a first decision amount, determining a first soft bit sequence according to the first decision amount, adopting a detection algorithm which processes the interference to perform calculation on the physical resource block having the interference to obtain a second decision amount, determining a second soft bit sequence according to the second decision amount, and determining a detection result according to the first soft bit sequence and the second soft bit sequence.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a detection method and apparatus.
Background
In a Long Term Evolution (LTE) system, due to co-frequency networking, co-frequency interference from neighboring cells may exist at a cell edge, and in order to solve the problem, in an interference scenario, a terminal (User Equipment, UE) may start an interference rejection combining (MMSE-IRC) algorithm based on a minimum mean square error criterion to obtain an improvement of detection performance.
Assuming that the serving cell is numbered i, in a scenario without neighbor cell interference, a transmission model of a multi-antenna system can be generally represented by formula (1):
y＝Hisi+n (1)
wherein y represents a reception vector; hiRepresenting the channel matrix is an N × M matrix, N representing the number of receive antennas, M representing the number of transmit antennas, siRepresenting the transmitted constellation symbol vector, n ∈ CN (0, sigma)2I) Representing a white noise vector.
Assuming that there are K cells in total including the serving cell, cell i is the serving cell, and the other K-1 cells are interfering cells, the transmission model can be expressed by equation (2):
where I denotes the signal of the interfering cell.
In a scenario without neighbor cell interference, a Minimum Mean Square Error (MMSE) detection algorithm is adopted, and an equalization vector of MMSE is represented by formula (3):
w＝(HHH+σ2IM)-1HH(3)
in the presence of adjacent cell interference, an MMSE-IRC detection algorithm is adopted, and an equalization vector of the MMSE-IRC algorithm is represented by formula (4):
wherein,an interference correlation matrix representing the interfering signal.
Regardless of which detection algorithm is used, after the equalization vector is obtained, the equalization vector is multiplied by the received signal to obtain a vector of decision quantities, which is expressed by equation (5):
and calculating soft bits by using the obtained decision quantity, and sending the soft bits to a decoder module after descrambling.
In an actual scenario, the interference of the neighbor cell is not full bandwidth, that is, the interference of the neighbor cell exists on a part of Physical Resource Blocks (PRBs), and the interference of the neighbor cell does not exist on a part of PRBs.
Disclosure of Invention
The embodiment of the invention provides a detection method and a detection device, which are used for solving the problem that the performance of a system is reduced due to the fact that a single detection algorithm is adopted on PRBs of a PDSCH or a PUSCH.
The embodiment of the invention provides the following specific technical scheme:
in a first aspect, a detection method is provided, including:
determining physical resource blocks with interference and physical resource blocks without interference in the scheduled physical resources;
for the physical resource block without interference, adopting a detection algorithm for processing interference to calculate to obtain a first decision quantity, determining a first soft bit sequence according to the first decision quantity, for the physical resource block with interference, adopting a detection algorithm for processing interference to calculate to obtain a second decision quantity, and determining a second soft bit sequence according to the second decision quantity;
and determining a detection result according to the first soft bit sequence and the second soft bit sequence.
Preferably, determining the detection result according to the first soft bit sequence and the second soft bit sequence comprises:
adjusting the amplitude of each soft bit in the first soft bit sequence by adopting a preset weight value to obtain an adjusted soft bit sequence;
and obtaining the detection result based on the adjusted soft bit sequence and the second soft bit sequence.
In an implementation, the preset weight value is greater than 1.
Preferably, the preset weight value is 10.
Specifically, determining the physical resource block with interference and the physical resource block without interference in the scheduled physical resources includes:
subtracting the noise variance from each element on the main diagonal of the interference correlation matrix corresponding to the physical resource block to obtain a corrected interference correlation matrix;
and calculating the sum of all elements on the main diagonal of the corrected interference correlation matrix, and judging whether the obtained sum is larger than a preset threshold value, if so, determining that the physical resource block has interference, otherwise, determining that the physical resource block does not have interference.
In a second aspect, there is provided a detection apparatus comprising:
the distinguishing module is used for determining the physical resource blocks with interference and the physical resource blocks without interference in the scheduled physical resources;
the detection module is used for calculating the physical resource block without interference by adopting a detection algorithm which does not process the interference to obtain a first decision quantity, determining a first soft bit sequence according to the first decision quantity, calculating the physical resource block with the interference by adopting a detection algorithm which processes the interference to obtain a second decision quantity, and determining a second soft bit sequence according to the second decision quantity;
a determining module, configured to determine a detection result according to the first soft bit sequence and the second soft bit sequence.
Preferably, the determining module is specifically configured to:
adjusting the amplitude of each soft bit in the first soft bit sequence by adopting a preset weight value to obtain an adjusted soft bit sequence;
and obtaining the detection result based on the adjusted soft bit sequence and the second soft bit sequence.
In an implementation, the preset weight value is greater than 1.
Preferably, the preset weight value is 10.
Specifically, the distinguishing module is specifically configured to:
subtracting the noise variance from each element on the main diagonal of the interference correlation matrix corresponding to the physical resource block to obtain a corrected interference correlation matrix;
and calculating the sum of all elements on the main diagonal of the corrected interference correlation matrix, and judging whether the obtained sum is larger than a preset threshold value, if so, determining that the physical resource block has interference, otherwise, determining that the physical resource block does not have interference.
Based on the technical scheme, in the embodiment of the invention, by distinguishing the physical resource block with interference and the physical resource block without interference of the scheduled physical resource, the physical resource block without interference is calculated by adopting a detection algorithm which does not process interference to obtain a first decision quantity, a first soft bit sequence is determined according to the first decision quantity, the physical resource block with interference is calculated by adopting a detection algorithm which processes interference to obtain a second decision quantity, a second soft bit sequence is determined according to the second decision quantity, and a detection result is determined based on the first soft bit sequence and the second soft bit sequence, so that the detection algorithm can be adaptively selected according to the interference condition, and the detection accuracy and the system performance are improved without increasing the complexity of the algorithm.
Drawings
FIG. 1 is a flow chart illustrating a detailed method for signal detection according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a signal detection process according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a detecting device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a terminal structure in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the present invention, as shown in fig. 1 and fig. 2, the detailed method flow of signal detection is as follows:
step 101: and determining the physical resource blocks with interference and the physical resource blocks without interference in the scheduled physical resources.
In specific implementation, the following process is performed for each physical resource block in the physical resources scheduled to the UE, to determine whether there is interference, specifically as follows:
subtracting the noise variance from each element on the main diagonal of the interference correlation matrix corresponding to the physical resource block to obtain a corrected interference correlation matrix;
and calculating the sum of all elements on the main diagonal of the corrected interference correlation matrix, and judging whether the obtained sum is larger than a preset threshold value, if so, determining that the physical resource block has interference, otherwise, determining that the physical resource block does not have interference.
Specifically, the following processes are performed for each PRB of the serving cell:
interference correlation matrix R calculated on PRBeSubtracting the noise variance matrix sigma2I, correcting the interference correlation matrix, namely subtracting the noise variance from each element on the main diagonal line of the interference correlation matrix to obtain a corrected interference correlation matrix;
calculating the sum of the numerical values of each element on the main diagonal in the modified interference correlation matrix, and expressing the sum as the following formula (6):
PI＝trace(Re-σ2I) (6)
if P isIIf the threshold value is larger than the preset threshold value TH, the interference exists on the PRB, otherwise, the interference does not exist on the PRB.
And if interference exists on at least one PRB in the PRBs scheduled to the UE by the serving cell, indicating that the serving cell has neighbor cell interference.
Step 102: for the PRB without interference, a detection algorithm which does not process the interference is adopted to calculate and obtain a first decision quantity, a first soft bit sequence is determined according to the first decision quantity, for the PRB with the interference, a detection algorithm which processes the interference is adopted to calculate and obtain a second decision quantity, and a second soft bit sequence is determined according to the second decision quantity.
In the embodiment of the present invention, the soft bit is a numerical value used for indicating the polarity and accuracy of each bit. In a system using channel coding techniques, a decoder for channel coding is used to perform decoding using soft bit inputs, and a corresponding signal is obtained.
Wherein the first soft bit sequence is comprised of a plurality of soft bits and the second soft bit sequence is comprised of a plurality of soft bits.
In the embodiment of the present invention, the detection algorithm that does not process interference includes, but is not limited to, an MMSE detection algorithm and a zero forcing detection algorithm (ZF), and the present invention also includes other detection algorithms that do not process interference.
The detection algorithm for processing the interference includes, but is not limited to, an MMSE-IRC detection algorithm, an interference rejection combining (ZF-IRC) detection algorithm based on a zero forcing criterion, and the present invention also includes other algorithms for processing the interference.
Preferably, when the detection algorithm for not processing the interference is MMSE, the detection algorithm for processing the interference adopts MMSE-IRC detection algorithm; and when the detection algorithm for not processing the interference is the ZF detection algorithm, the detection algorithm for processing the interference adopts a ZF-IRC detection algorithm.
Specifically, taking a detection algorithm for not processing interference as MMSE, taking an MMSE-IRC detection algorithm as an example of a detection algorithm for processing interference, obtaining a first equalization vector for a PRB without interference by using an MMSE detection algorithm, and multiplying the first equalization vector by a received signal corresponding to the PRB without interference to obtain a first decision quantity;
and obtaining a second equalization vector by adopting an MMSE-IRC detection algorithm on the interfered PRB, and multiplying the second equalization vector by the received signal corresponding to the interfered PRB to obtain a second decision quantity.
It should be noted that, corresponding decision amounts can be obtained only by replacing MMSE in this embodiment with other detection algorithms that do not process interference and replacing MMSE-IRC with other detection algorithms that process interference.
In the embodiment of the invention, the soft bit sequence corresponding to the decision quantity can be obtained by calculating the distance between the decision quantity and each constellation point corresponding to the modulation mode adopted by transmission.
The concrete description is as follows:
it is assumed that the serving cell schedules P PRBs for the UE, where PRBs with subscripts 1 to Q are not interfered by neighboring cells, and PRBs with subscripts Q +1 to P are interfered by neighboring cells, where Q is a positive integer greater than 1 and less than P.
UE calculates each RE on PRB from subscript 1 to Q by adopting MMSE detection algorithm to obtain a first equalization vector, multiplies the first equalization vector by the received signal of the corresponding RE to obtain a first decision quantity, and a first soft bit sequence calculated according to the first decision quantity is represented as LMMSE；
UE calculates each RE on PRB with the subscripts of Q +1 to P by adopting an MMSE-IRC algorithm to obtain a second equalization vector, multiplies the second equalization vector by the receiving signal of the corresponding RE on the PRB with the subscripts of Q +1 to P to obtain a second decision quantity, and a second soft bit sequence calculated according to the second decision quantity is expressed as LMMSE-IRC。
Step 103: and determining a detection result according to the first soft bit sequence and the second soft bit sequence.
Preferably, after the amplitude of each soft bit in the first soft bit sequence is adjusted by using a preset weight, a detection result is obtained based on the soft bit sequence obtained after adjustment and the second soft bit sequence.
Specifically, the soft bit sequence obtained after adjustment and the second soft bit sequence are descrambled and decoded to obtain a final detection result.
The process of descrambling and decoding the soft bit sequence to obtain the detection result is not the content of interest in the present invention, and the present invention is not limited to this, and the present invention can be implemented by using the existing descrambling and decoding process, which is described herein again.
The concrete description is as follows:
for the first soft bit sequence LMMSEAmplifying the amplitude by α times, wherein α is more than 1, and amplifying the amplitude by α & LMMSEAnd LMMSE-IRCThe combined signals are input into a descrambler and then input into a decoder, and the final detection result is output by the decoder.
The value of alpha is obtained by evaluating the throughput performance under different values through simulation, the value of alpha is different under different scenes generally, and a value which enables the performance robustness to be good is taken as an alpha value through the comparison of throughput.
Preferably, α is a fixed value greater than 1.
Preferably, α takes a fixed value of 10.
The signal detection process provided by the present invention is illustrated by two specific examples below.
The first embodiment:
assuming downlink transmission in an LTE system, the system bandwidth is 10 megahertz (MHz), and UEs are scheduled to transmit PDSCH data traffic on PRBs 0 through PRB 5.
Assuming that the number of cell-specific pilot (CRS) ports is 2, denoted CFI equal to 2, transmission is performed in a normal subframe using a normal Cyclic Prefix (CP), the transmission mode is transmission mode 6, i.e. closed-loop RANK1 transmission, the modulation scheme is Quadrature Phase Shift Keying (QPSK), 792 QPSK symbols are transmitted on the transmitted 6 PRBs in total, and 1584 bits are obtained.
The terminal firstly judges whether the interference of the interference cell exists on the allocated PRB, and the method specifically comprises the following steps:
subtracting the noise variance from each element on the main diagonal of the interference correlation matrix, correcting the interference correlation matrix, calculating the sum of each element on the main diagonal of the corrected interference correlation matrix, and if the sum is greater than a preset threshold value, considering that the interference exists on the PRB, otherwise, considering that the interference does not exist on the PRB.
Assume that the terminal determines that it is not experiencing neighbor cell interference at PRB0-PRB1 and experiences neighbor cell interference at PRB2-PRB 5.
The terminal carries out MMSE detection on the signals of the PRBs 0-PRBs 1 and carries out MMSE-IRC detection on the signals of the PRBs 2-PRBs 5.
528 soft bits of MMSE detection output are amplified by 10 times by adopting 528 soft bits of MMSE detection output and 1056 soft bits of MMSE-IRC detection output, and 1056 soft bits of the MMSE-IRC detection output are not amplified.
And amplifying 528 soft bits output by MMSE detection by 10 times, combining the amplified soft bits with 1056 soft bits output by MMSE-IRC detection, and inputting the combined soft bits into a decoder to obtain a final detection result.
The second embodiment:
assuming that uplink transmission is performed in an LTE system, the system bandwidth is 10MHz, a UE is scheduled to transmit PUSCH data traffic on PRB10-PRB15, and transmits in a conventional subframe using a conventional CP, the modulation scheme is QPSK, 864 QPSK symbols and 1728 soft bits are transmitted on 6 transmitted PRBs.
The base station firstly judges whether uplink interference of interference cell users exists on the allocated PRB, and the method specifically comprises the following steps:
subtracting the noise variance from each element on the main diagonal of the interference correlation matrix, correcting the interference correlation matrix, calculating the sum of each element on the main diagonal of the corrected interference correlation matrix, and if the sum is greater than a preset threshold value, considering that the interference exists on the PRB, otherwise, considering that the interference does not exist on the PRB.
Assume that it is determined that the PRB10-PRB11 is not subject to neighbor cell user interference and that the PRB12-PRB15 is subject to neighbor cell user interference.
The base station carries out MMSE detection on the signals of the PRBs 10-PRBs 11 and carries out MMSE-IRC detection on the signals of the PRBs 12-PRBs 15.
And (3) adopting 576 soft bits output by MMSE detection and 1152 soft bits output by MMSE-IRC detection, amplifying the 576 soft bits output by the MMSE detection by 10 times, and not amplifying the 1152 soft bits output by the MMSE-IRC detection.
After amplifying 576 soft bits output by MMSE detection by 10 times, combining the 576 soft bits with 1152 soft bits output by MMSE-IRC detection and inputting the combination into a decoder to obtain a final detection result.
Based on the same inventive concept, the embodiment of the present invention further provides a detection apparatus, and the specific implementation of the apparatus may refer to the description of the above method, and repeated details are not repeated, as shown in fig. 3, the apparatus mainly includes:
a distinguishing module 301, configured to determine a physical resource block with interference and a physical resource block without interference in scheduled physical resources;
a detection module 302, configured to calculate, for the physical resource block without interference, a first decision amount by using a detection algorithm that does not process interference, determine a first soft bit sequence according to the first decision amount, calculate, for the physical resource block with interference, a second decision amount by using a detection algorithm that processes interference, and determine a second soft bit sequence according to the second decision amount;
a determining module 303, configured to determine a detection result according to the first soft bit sequence and the second soft bit sequence.
Preferably, the determining module is specifically configured to:
adjusting the amplitude of each soft bit in the first soft bit sequence by adopting a preset weight value to obtain an adjusted soft bit sequence;
and obtaining the detection result based on the adjusted soft bit sequence and the second soft bit sequence.
Wherein the preset weight value is greater than 1.
Preferably, the preset weight value is 10.
Specifically, the distinguishing module is specifically configured to:
subtracting the noise variance from each element on the main diagonal of the interference correlation matrix corresponding to the physical resource block to obtain a corrected interference correlation matrix;
and calculating the sum of all elements on the main diagonal of the corrected interference correlation matrix, and judging whether the obtained sum is larger than a preset threshold value, if so, determining that the physical resource block has interference, otherwise, determining that the physical resource block does not have interference.
Based on the same inventive concept, an embodiment of the present invention further provides a terminal, and specific implementation of the terminal may refer to the description of the foregoing method part, and repeated parts are not repeated, as shown in fig. 4, the terminal mainly includes a processor 401 and a memory 402, where the memory 402 stores a preset program, the processor 401 is configured to read the preset program in the memory 402, and execute the following processes according to the program:
determining physical resource blocks with interference and physical resource blocks without interference in the scheduled physical resources;
for the physical resource block without interference, adopting a detection algorithm for processing interference to calculate to obtain a first decision quantity, determining a first soft bit sequence according to the first decision quantity, for the physical resource block with interference, adopting a detection algorithm for processing interference to calculate to obtain a second decision quantity, and determining a second soft bit sequence according to the second decision quantity;
and determining a detection result according to the first soft bit sequence and the second soft bit sequence.
Preferably, the processor 401 adjusts the amplitude of each soft bit in the first soft bit sequence by using a preset weight value, to obtain an adjusted soft bit sequence; and obtaining the detection result based on the adjusted soft bit sequence and the second soft bit sequence.
Wherein the preset weight value is greater than 1.
Preferably, the preset weight value is 10.
Specifically, the processor 401 subtracts the noise variance from each element on the main diagonal of the interference correlation matrix corresponding to the physical resource block to obtain a corrected interference correlation matrix;
and calculating the sum of all elements on the main diagonal of the corrected interference correlation matrix, and judging whether the obtained sum is larger than a preset threshold value, if so, determining that the physical resource block has interference, otherwise, determining that the physical resource block does not have interference.
Where in fig. 4 the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors, represented by processor 401, and various circuits of memory, represented by memory 402, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface.
Based on the technical scheme, in the embodiment of the invention, by distinguishing the physical resource block with interference and the physical resource block without interference of the scheduled physical resource, the physical resource block without interference is calculated by adopting a detection algorithm which does not process interference to obtain a first decision quantity, a first soft bit sequence is determined according to the first decision quantity, the physical resource block with interference is calculated by adopting a detection algorithm which processes interference to obtain a second decision quantity, a second soft bit sequence is determined according to the second decision quantity, and a detection result is determined based on the first soft bit sequence and the second soft bit sequence, so that the detection algorithm can be adaptively selected according to the interference condition, and the detection accuracy and the system performance are improved without increasing the complexity of the algorithm.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method of detection, comprising:
determining physical resource blocks with interference and physical resource blocks without interference in the scheduled physical resources;
for the physical resource block without interference, adopting a detection algorithm for processing interference to calculate to obtain a first decision quantity, determining a first soft bit sequence according to the first decision quantity, for the physical resource block with interference, adopting a detection algorithm for processing interference to calculate to obtain a second decision quantity, and determining a second soft bit sequence according to the second decision quantity;
and determining a detection result according to the first soft bit sequence and the second soft bit sequence.
2. The method of claim 1, wherein determining detection results from the first soft bit sequence and the second soft bit sequence comprises:
adjusting the amplitude of each soft bit in the first soft bit sequence by adopting a preset weight value to obtain an adjusted soft bit sequence;
and obtaining the detection result based on the adjusted soft bit sequence and the second soft bit sequence.
3. The method of claim 2, wherein the preset weight value is greater than 1.
4. The method of claim 3, wherein the predetermined weight value is 10.
5. The method of any one of claims 1-4, wherein determining interfering physical resource blocks and non-interfering physical resource blocks in the scheduled physical resources comprises:
subtracting the noise variance from each element on the main diagonal of the interference correlation matrix corresponding to the physical resource block to obtain a corrected interference correlation matrix;
and calculating the sum of all elements on the main diagonal of the corrected interference correlation matrix, and judging whether the obtained sum is larger than a preset threshold value, if so, determining that the physical resource block has interference, otherwise, determining that the physical resource block does not have interference.
6. A detection device, comprising:
the distinguishing module is used for determining the physical resource blocks with interference and the physical resource blocks without interference in the scheduled physical resources;
the detection module is used for calculating the physical resource block without interference by adopting a detection algorithm which does not process the interference to obtain a first decision quantity, determining a first soft bit sequence according to the first decision quantity, calculating the physical resource block with the interference by adopting a detection algorithm which processes the interference to obtain a second decision quantity, and determining a second soft bit sequence according to the second decision quantity;
a determining module, configured to determine a detection result according to the first soft bit sequence and the second soft bit sequence.
7. The apparatus of claim 6, wherein the determination module is specifically configured to:
adjusting the amplitude of each soft bit in the first soft bit sequence by adopting a preset weight value to obtain an adjusted soft bit sequence;
and obtaining the detection result based on the adjusted soft bit sequence and the second soft bit sequence.
8. The apparatus of claim 7, wherein the preset weight value is greater than 1.
9. The apparatus of claim 8, wherein the preset weight value is 10.
10. The apparatus according to any one of claims 6 to 9, wherein the distinguishing module is specifically configured to:
subtracting the noise variance from each element on the main diagonal of the interference correlation matrix corresponding to the physical resource block to obtain a corrected interference correlation matrix;
and calculating the sum of all elements on the main diagonal of the corrected interference correlation matrix, and judging whether the obtained sum is larger than a preset threshold value, if so, determining that the physical resource block has interference, otherwise, determining that the physical resource block does not have interference.
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