CN107204817B - Interference detection method and terminal - Google Patents

Interference detection method and terminal Download PDF

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CN107204817B
CN107204817B CN201610149929.XA CN201610149929A CN107204817B CN 107204817 B CN107204817 B CN 107204817B CN 201610149929 A CN201610149929 A CN 201610149929A CN 107204817 B CN107204817 B CN 107204817B
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interference
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cell
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CN107204817A (en
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熊芳
黄秋萍
陈润华
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Datang Mobile Communications Equipment Co Ltd
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
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Abstract

The invention provides an interference detection method and a terminal, and relates to the technical field of communication. The interference detection method of the invention comprises the following steps: determining a first interference cell of a current service cell of a terminal; acquiring data power of a Physical Downlink Shared Channel (PDSCH) and pilot power of a Common Reference Signal (CRS) of the first interference cell on a Physical Resource Block (PRB) occupied by a current service cell of the terminal; acquiring a first power allocation value of the first interference cell according to the PDSCH data power and the CRS pilot frequency power; and determining whether the interference of the first interference cell exists on the PRB according to the first power allocation value. The scheme of the invention realizes the accurate judgment of the cell interference on the basis of the PRB and improves the accuracy of the interference detection.

Description

Interference detection method and terminal
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an interference detection method and a terminal.
Background
An NAICS (Network Assisted Interference Suppression and Suppression) technology is introduced into an LTE-A (Long Term Evolution-Advanced) Rel-12 system, a Network side issues NAICS-related high-level signaling information, and the UE detects the information of a local cell according to partial information of an Interference cell in the high-level signaling and blind detection of the information of the local cell, so that a target signal can obtain good performance, and the system throughput under the Interference scene is improved. However, the sending of complete and accurate information of the interfering cell may limit the flexibility of the transmission scheduling of the interfering cell by the base station side, and on the other hand, the overhead of the complete and accurate information is too large, so that it is difficult to send the perfect information. Therefore, the UE also needs to perform blind detection on part of the dynamic parameters for interference determination.
However, in the existing scheme, there is no systematic scheme for obtaining whether there is interference from an interfering cell on a physical resource block occupied by a terminal in a current serving cell according to blind detection of the terminal, which brings inconvenience to accurate determination of the interference.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an interference detection method and a terminal, so as to solve the problem that the existing technical scheme cannot obtain whether the interference of an interfering cell exists on a physical resource block occupied by the terminal under a current serving cell according to the blind detection of the terminal, and cannot accurately determine whether the cell interference exists.
In order to solve the above technical problem, an embodiment of the present invention provides an interference detection method, including:
determining a first interference cell of a current service cell of a terminal;
acquiring data power of a Physical Downlink Shared Channel (PDSCH) and pilot power of a Common Reference Signal (CRS) of the first interference cell on a Physical Resource Block (PRB) occupied by a current service cell of the terminal;
acquiring a first power allocation value of the first interference cell according to the PDSCH data power and the CRS pilot frequency power;
and determining whether the interference of the first interference cell exists on the PRB according to the first power allocation value.
Further, the step of obtaining the data power of the physical downlink shared channel PDSCH and the pilot power of the common reference signal CRS of the first interfering cell on the physical resource block PRB occupied by the current serving cell of the terminal includes:
respectively acquiring a CRS pilot sequence and a first frequency domain receiving signal of the first interference cell on a PRB;
performing channel estimation on the first interfering cell according to the CRS pilot sequence and the first frequency domain receiving signal to obtain a first channel estimation result;
acquiring PDSCH data power of the first interference cell according to the first channel estimation result, the CRS pilot frequency sequence and the first frequency domain receiving signal;
and acquiring the CRS pilot frequency power of the first interference cell according to the first channel estimation result.
Further, the step of obtaining the PDSCH data power of the first interfering cell according to the first channel estimation result, the CRS pilot sequence, and the first frequency domain received signal includes:
acquiring an interference covariance matrix of the first interference cell according to the first channel estimation result, the CRS pilot frequency sequence and the first frequency domain receiving signal;
calculating a correlation matrix of the first frequency domain received signal according to the first frequency domain received signal;
and acquiring the PDSCH data power of the first interference cell according to the correlation matrix and the interference covariance matrix.
Further, the step of obtaining the interference covariance matrix of the first interfering cell according to the first channel estimation result, the CRS pilot sequence, and the first frequency domain received signal specifically includes:
according to the formula:
Figure BDA0000942547050000021
calculating an interference covariance matrix of the first interfering cell;
wherein R isnnIs dimension NRX×NRXA matrix representing an interference covariance matrix of the first interfering cell; n is a radical ofCRS_RERepresenting the number of CRS resource units in one PRB;
Figure BDA0000942547050000022
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapFrequency domain receiving signals of a CRS part in first frequency domain receiving signals of the antenna ports;
Figure BDA0000942547050000031
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapA first channel estimation result for each antenna port;
Figure BDA0000942547050000032
is dimension NapX 1 vector, representing N on the kth CRS resource element under the current PRBapCRS pilot frequency sequences of each antenna port;
Figure BDA0000942547050000033
is dimension NRX×NapDenotes a matrix of (c) will
Figure BDA0000942547050000034
Each row of elements of and
Figure BDA0000942547050000035
multiplying each row of elements of (a); (.)HRepresenting the conjugate transpose of a matrix or vector.
Further, the step of calculating the correlation matrix of the first frequency domain received signal according to the first frequency domain received signal specifically includes:
according to the formula:
Figure BDA0000942547050000036
calculating a correlation matrix of the first frequency domain received signal;
wherein R isyyIs one NRX×NRXA matrix representing a correlation matrix of the first frequency domain received signal;
Figure BDA0000942547050000037
is dimension NRXA matrix of x 1, which represents a received signal on the kth data resource unit of a first frequency domain received signal under a current PRB; n is a radical ofREThe number of the data resource units under the current PRB is shown; denotes matrix multiplication.
Further, the step of obtaining the PDSCH data power of the first interfering cell according to the correlation matrix and the interference covariance matrix specifically includes:
according to the formula: p1 ═ Trace (R)yy-Rnn) Calculating to obtain the PDSCH data power of the first interference cell;
wherein P1 represents PDSCH data power of the first interfering cell; trace () represents the sum function over the diagonal elements of the matrix.
Further, the step of obtaining the CRS pilot power of the first interfering cell according to the first channel estimation result includes:
acquiring an autocorrelation matrix of channel estimation of the first interference cell according to the first channel estimation result;
and acquiring the CRS pilot frequency power of the first interference cell according to the autocorrelation matrix.
Further, the step of obtaining the autocorrelation matrix of the channel estimation of the first interfering cell according to the first channel estimation result specifically includes:
according to the formula:
Figure BDA0000942547050000038
calculating to obtain an autocorrelation matrix of the channel estimation of the first interfering cell;
wherein R isiiIs one NRX×NRXA matrix representing an autocorrelation matrix of a channel estimate of the first interfering cell; n is a radical ofCRS_RERepresenting the number of CRS resource units in one PRB;
Figure BDA0000942547050000041
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapA first channel estimation result for each antenna port; denotes matrix multiplication; (.)HRepresenting the conjugate transpose of a matrix or vector.
Further, the step of acquiring the CRS pilot power of the first interfering cell according to the autocorrelation matrix specifically includes:
according to the formula: p2 ═ Trace (R)ii) Calculating CRS pilot power of the first interference cell;
wherein P2 represents CRS pilot power of the first interfering cell; trace () represents the sum function over the diagonal elements of the matrix.
Further, the step of obtaining the first power allocation value of the first interfering cell according to the PDSCH data power and the CRS pilot power specifically includes:
and obtaining a first power allocation value of the first interference cell by calculating the ratio of the PDSCH data power to the CRS pilot power.
Further, the step of determining whether the interference of the first interfering cell exists on the PRB according to the first power allocation value specifically includes:
dividing the data area into intervals according to the power distribution value in the received power distribution set;
if the first power allocation value is within a preset interval, the interference of the first interference cell does not exist on the PRB;
if the first power allocation value is not within a preset interval, the interference of the first interference cell exists on the PRB.
Further, the step of dividing the data region into intervals according to the power allocation value in the received power allocation set includes:
acquiring a threshold value for interval division according to a power distribution value in a received power distribution set;
and dividing the data area into a plurality of intervals according to the threshold value.
Further, the step of obtaining the threshold value for interval division according to the power allocation value in the received power allocation set specifically includes:
according to the formula:
Figure BDA0000942547050000042
obtaining a threshold value for interval division;
therein, thaA first threshold value for dividing the interval; pA,aA linear value corresponding to the a-th power distribution value is represented; Δ represents a fixed constant; m represents the number of power allocation values in the power allocation set.
Further, if the first power allocation value is not within a preset interval, the interference detection method further includes:
acquiring an equivalent channel estimation matrix of the first interference cell;
and acquiring a second power allocation value of the first interference cell on the PRB according to the equivalent channel estimation matrix, the correlation matrix of the first frequency domain received signal and the interference covariance matrix.
Further, the step of obtaining the equivalent channel estimation matrix of the first interfering cell specifically includes:
according to the formula:
Figure BDA0000942547050000051
acquiring an equivalent channel estimation matrix of the first interference cell on each codebook;
wherein Hi,effAn equivalent channel estimation matrix representing the first interference cell on the b-th codebook;
Figure BDA0000942547050000052
indicating a channel estimation result of a first interfering cell on a current PRB; wbRepresenting the value of the b-th codebook.
Further, the step of obtaining, according to the equivalent channel estimation matrix, the correlation matrix of the first frequency domain received signal, and the interference covariance matrix, a second power allocation value of the first interfering cell on the PRB specifically includes:
according to the formula:
Figure BDA0000942547050000053
calculating to obtain a second power allocation value of the first interference cell on the PRB;
wherein, PARepresenting a second power allocation value; rnnIs dimension NRX×NRXA matrix representing an interference covariance matrix of the first interfering cell; ryyIs one NRX×NRXRepresents a correlation matrix of the first frequency domain received signal.
An embodiment of the present invention provides a terminal, including:
a first determining module, configured to determine a first interfering cell of a current serving cell of a terminal;
a first obtaining module, configured to obtain data power of a physical downlink shared channel PDSCH and pilot power of a common reference signal CRS on a physical resource block PRB occupied by the current serving cell of the terminal by the first interfering cell;
a second obtaining module, configured to obtain a first power allocation value of the first interfering cell according to the PDSCH data power and the CRS pilot power;
a second determining module, configured to determine whether interference of the first interfering cell exists on the PRB according to the first power allocation value.
Further, the first obtaining module comprises:
a first obtaining sub-module, configured to obtain a CRS pilot sequence and a first frequency domain receiving signal of the first interfering cell on a PRB, respectively;
a channel estimation submodule, configured to perform channel estimation on the first interfering cell according to the CRS pilot sequence and the first frequency domain received signal, to obtain a first channel estimation result;
a second obtaining submodule, configured to obtain PDSCH data power of the first interfering cell according to the first channel estimation result, the CRS pilot sequence, and the first frequency domain receiving signal;
and a third obtaining sub-module, configured to obtain, according to the first channel estimation result, a CRS pilot power of the first interfering cell.
Further, the second obtaining sub-module includes:
a first obtaining unit, configured to obtain an interference covariance matrix of the first interfering cell according to the first channel estimation result, the CRS pilot sequence, and the first frequency domain received signal;
a calculating unit, configured to calculate a correlation matrix of the first frequency domain received signal according to the first frequency domain received signal;
a second obtaining unit, configured to obtain PDSCH data power of the first interfering cell according to the correlation matrix and the interference covariance matrix.
Further, the first obtaining unit is specifically configured to:
according to the formula:
Figure BDA0000942547050000061
calculating an interference covariance matrix of the first interfering cell;
wherein R isnnIs dimension NRX×NRXA matrix representing an interference covariance matrix of the first interfering cell; n is a radical ofCRS_RERepresenting the number of CRS resource units in one PRB;
Figure BDA0000942547050000062
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapFrequency domain receiving signals of a CRS part in first frequency domain receiving signals of the antenna ports;
Figure BDA0000942547050000063
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapA first channel estimation result for each antenna port;
Figure BDA0000942547050000064
is dimension NapX 1 vector, representing N on the kth CRS resource element under the current PRBapCRS pilot frequency sequences of each antenna port;
Figure BDA0000942547050000065
is dimension NRX×NapDenotes a matrix of (c) will
Figure BDA0000942547050000066
Each row of elements of and
Figure BDA0000942547050000067
multiplying each row of elements of (a); (.)HRepresenting the conjugate transpose of a matrix or vector.
Further, the computing unit is specifically configured to:
according to the formula:
Figure BDA0000942547050000071
calculating a correlation matrix of the first frequency domain received signal;
wherein R isyyIs one NRX×NRXA matrix representing a correlation matrix of the first frequency domain received signal;
Figure BDA0000942547050000072
is dimension NRXA matrix of x 1, which represents a received signal on the kth data resource unit of a first frequency domain received signal under a current PRB; n is a radical ofREThe number of the data resource units under the current PRB is shown; denotes matrix multiplication.
Further, the second obtaining unit is specifically configured to:
according to the formula: p1 ═ Trace (R)yy-Rnn) Calculating to obtain the PDSCH data power of the first interference cell;
wherein P1 represents PDSCH data power of the first interfering cell; trace () represents the sum function over the diagonal elements of the matrix.
Further, the third obtaining sub-module includes:
a third obtaining unit, configured to obtain an autocorrelation matrix of channel estimation of the first interfering cell according to the first channel estimation result;
a fourth obtaining unit, configured to obtain CRS pilot power of the first interfering cell according to the autocorrelation matrix.
Further, the third obtaining unit is specifically configured to:
according to the formula:
Figure BDA0000942547050000073
calculating to obtain an autocorrelation matrix of the channel estimation of the first interfering cell;
wherein R isiiIs one NRX×NRXA matrix representing an autocorrelation matrix of a channel estimate of the first interfering cell; n is a radical ofCRS_RERepresenting the number of CRS resource units in one PRB;
Figure BDA0000942547050000074
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapA first channel estimation result for each antenna port; denotes matrix multiplication; (.)HRepresenting the conjugate transpose of a matrix or vector.
Further, the fourth obtaining unit is specifically configured to:
according to the formula: p2 ═ Trace (R)ii) Calculating CRS pilot power of the first interference cell;
wherein P2 represents CRS pilot power of the first interfering cell; trace () represents the sum function over the diagonal elements of the matrix.
Further, the second obtaining module is specifically configured to:
and obtaining a first power allocation value of the first interference cell by calculating the ratio of the PDSCH data power to the CRS pilot power.
Further, the second determining module includes:
the division submodule is used for carrying out interval division on the data area according to the power distribution value in the received power distribution set;
determining a sub-module, wherein if the first power allocation value is within a preset interval, the interference of the first interference cell does not exist on the PRB;
if the first power allocation value is not within a preset interval, the interference of the first interference cell exists on the PRB.
Further, the partitioning sub-module includes:
a threshold value obtaining unit, configured to obtain a threshold value for interval division according to a power allocation value in the received power allocation set;
and the interval dividing unit is used for dividing the data area into a plurality of intervals according to the threshold value.
Further, the threshold value obtaining unit is specifically configured to:
according to the formula:
Figure BDA0000942547050000081
obtaining a threshold value for interval division;
therein, thaA first threshold value for dividing the interval; pA,aA linear value corresponding to the a-th power distribution value is represented; Δ represents a fixed constant; m represents the number of power allocation values in the power allocation set.
Further, the terminal further includes:
a third obtaining module, configured to obtain an equivalent channel estimation matrix of the first interfering cell;
a fourth obtaining module, configured to obtain a second power allocation value of the first interfering cell on the PRB according to the equivalent channel estimation matrix, the correlation matrix of the first frequency domain received signal, and the interference covariance matrix.
Further, the third obtaining module is specifically configured to:
according to the formula:
Figure BDA0000942547050000082
acquiring an equivalent channel estimation matrix of the first interference cell on each codebook;
wherein Hi,effAn equivalent channel estimation matrix representing the first interference cell on the b-th codebook;
Figure BDA0000942547050000083
indicating a channel estimation result of a first interfering cell on a current PRB; wbRepresenting the value of the b-th codebook.
Further, the fourth obtaining module is specifically configured to:
according to the formula:
Figure BDA0000942547050000091
calculating to obtain a second power allocation value of the first interference cell on the PRB;
wherein, PARepresenting a second power allocation value; rnnIs dimension NRX×NRXA matrix representing an interference covariance matrix of the first interfering cell; ryyIs one NRX×NRXRepresents a correlation matrix of the first frequency domain received signal.
The invention has the beneficial effects that:
according to the scheme, the power distribution value of the first interference cell on the current PRB is obtained according to the PDSCH data power and the CRS pilot frequency power of each PRB occupied by the terminal on the current service cell, and then whether the interference of the first interference cell exists on the current PRB is judged according to the power distribution value.
Drawings
Fig. 1 is a schematic flow chart illustrating an interference detection method according to a first embodiment of the present invention;
fig. 2 is a flowchart illustrating an interference detection method according to a second embodiment of the present invention;
fig. 3 is a schematic flowchart illustrating a specific implementation of step 24 in the second embodiment;
fig. 4 is a schematic flowchart illustrating a specific implementation of step 25 in the second embodiment;
fig. 5 is a flowchart illustrating an interference detection method according to a third embodiment of the present invention;
fig. 6 is a flowchart illustrating an interference detection method according to a fourth embodiment of the present invention;
FIG. 7 shows a general flow diagram of the interference detection method of the present invention;
fig. 8 is a block diagram of a terminal according to a fifth embodiment of the present invention;
fig. 9 is a schematic diagram of a terminal according to a sixth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The invention provides an interference detection method and a terminal aiming at the problems that the prior technical scheme can not obtain whether the interference of an interference cell exists on a physical resource block occupied by the terminal under the current service cell according to the blind detection of the terminal and can not accurately judge whether the cell interference exists.
Example one
As shown in fig. 1, an interference detection method according to a first embodiment of the present invention includes:
step 11, determining a first interference cell of a current service cell of a terminal;
it should be noted that, in this embodiment, the first interfering cell is a strongest interfering cell of the terminal under the current serving cell, and in step 11, the terminal may determine the strongest interfering cell according to its own received signal.
Step 12, acquiring data power of a Physical Downlink Shared Channel (PDSCH) and pilot power of a Common Reference Signal (CRS) of the first interfering cell on a Physical Resource Block (PRB) occupied by a current serving cell of the terminal;
in this embodiment, the PDSCH data power and the CRS pilot power are mainly used to calculate the first power allocation value of the strongest interfering cell, but the first power allocation value in the present invention is for each PRB, so the PDSCH data power and CRS pilot power of the first interfering cell on each PRB occupied by the current serving cell of the terminal are acquired in step 12.
Step 13, acquiring a first power allocation value of the first interference cell according to the PDSCH data power and the CRS pilot frequency power;
it should be noted that, the specific implementation manner of step 13 is: and calculating the ratio of the PDSCH data power to the CRS pilot power to obtain a first power allocation value of the first interference cell, namely the first power allocation value is PDSCH data power/CRS pilot power.
Step 14, determining whether the interference of the first interfering cell exists on the PRB according to the first power allocation value.
It should be noted that, since the NAICS scenario does not support mimo for multiple users in transmission mode 5, nor 4-port transmission, the first power allocation value determined by the PDSCH data power and the CRS pilot power in this embodiment is ρ in 3GPPA。
In this embodiment, a power allocation value of the first interfering cell on the current PRB is obtained according to the PDSCH data power and the CRS pilot power of the terminal on each PRB occupied by the current serving cell, and then whether the interference of the first interfering cell exists on each PRB is determined according to the power allocation value.
Example two
As shown in fig. 2, the interference detection method according to the second embodiment of the present invention includes:
step 21, determining a first interference cell of a current service cell of the terminal;
wherein the first interfering cell refers to the strongest interfering cell of the current serving cell.
Step 22, respectively acquiring a CRS pilot sequence and a first frequency domain receiving signal of the first interfering cell on a PRB;
herein, the CRS pilot sequence and the first frequency-domain received signal also refer to the CRS pilot sequence and the first frequency-domain received signal of the strongest interfering cell located on each PRB.
Step 23, performing channel estimation on the first interfering cell according to the CRS pilot sequence and the first frequency domain receiving signal to obtain a first channel estimation result;
step 24, obtaining PDSCH data power of the first interfering cell according to the first channel estimation result, the CRS pilot sequence and the first frequency domain received signal;
step 25, acquiring the CRS pilot power of the first interfering cell according to the first channel estimation result;
step 26, obtaining a first power allocation value of the first interfering cell according to the PDSCH data power and the CRS pilot power;
step 27, determining whether the interference of the first interfering cell exists on the PRB according to the first power allocation value.
Optionally, as shown in fig. 3, when the step 24 is implemented, the method specifically includes:
step 241, obtaining an interference covariance matrix of the first interfering cell according to the first channel estimation result, the CRS pilot sequence, and the first frequency domain received signal;
step 242, calculating a correlation matrix of the first frequency domain received signal according to the first frequency domain received signal;
and 243, obtaining PDSCH data power of the first interfering cell according to the correlation matrix and the interference covariance matrix.
Specifically, the step 241 may be implemented as follows:
according to the formula:
Figure BDA0000942547050000111
calculating an interference covariance matrix of the first interfering cell;
wherein R isnnIs dimension NRX×NRXA matrix representing an interference covariance matrix of the first interfering cell; n is a radical ofCRS_RERepresenting the number of CRS resource units in one PRB;
Figure BDA0000942547050000112
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapFrequency domain receiving signals of a CRS part in first frequency domain receiving signals of the antenna ports;
Figure BDA0000942547050000121
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapA first channel estimation result for each antenna port;
Figure BDA0000942547050000122
is dimension NapX 1 vector, representing N on the kth CRS resource element under the current PRBapCRS pilot frequency sequences of each antenna port;
Figure BDA0000942547050000123
is dimension NRX×NapDenotes a matrix of (c) will
Figure BDA0000942547050000124
Each row of elements of and
Figure BDA0000942547050000125
multiplying each row of elements of (a); (.)HRepresenting the conjugate transpose of a matrix or vector.
Specifically, the step 242 may be implemented as follows:
according to the formula:
Figure BDA0000942547050000126
calculating a correlation matrix of the first frequency domain received signal;
wherein R isyyIs one NRX×NRXA matrix representing a correlation matrix of the first frequency domain received signal;
Figure BDA0000942547050000127
is dimension NRXA matrix of x 1, which represents a received signal on the kth data resource unit of a first frequency domain received signal under a current PRB; n is a radical ofREThe number of the data resource units under the current PRB is shown; denotes matrix multiplication.
Specifically, the step 243 may be implemented as follows:
according to the formula: p1 ═ Trace (R)yy-Rnn) Calculating to obtain the PDSCH data power of the first interference cell;
wherein P1 represents PDSCH data power of the first interfering cell; trace () represents the sum function over the diagonal elements of the matrix.
Optionally, as shown in fig. 4, when the step 25 is implemented, the method specifically includes:
step 251, obtaining an autocorrelation matrix of the channel estimation of the first interfering cell according to the first channel estimation result;
step 252, obtaining the CRS pilot power of the first interfering cell according to the autocorrelation matrix.
Specifically, the step 251 may be implemented as follows:
according to the formula:
Figure BDA0000942547050000128
calculating to obtain an autocorrelation matrix of the channel estimation of the first interfering cell;
wherein R isiiIs one NRX×NRXRepresents an autocorrelation matrix of the channel estimate of the first interfering cell.
Specifically, the step 252 may be implemented as follows:
according to the formula: p2 ═ Trace (R)ii) Calculating CRS pilot power of the first interference cell;
where P2 denotes the CRS pilot power of the first interfering cell.
It should be noted that, in this embodiment, first, a CRS pilot sequence and a first frequency domain receiving signal of the first interfering cell on each PRB are obtained, where the CRS pilot sequence is obtained by the terminal through reconstruction according to a signal of the strongest interfering cell, and the first frequency domain receiving signal is a frequency domain receiving signal of the strongest interfering cell extracted by the terminal from received frequency domain receiving signals; and calculating the PDSCH data power and the CRS pilot power on each PRB according to the mode provided in the embodiment, so that the obtained PDSCH data power and CRS pilot power have high accuracy.
EXAMPLE III
As shown in fig. 5, the interference detection method according to the third embodiment of the present invention includes:
step 51, determining a first interference cell of a current service cell of the terminal;
wherein the first interfering cell refers to the strongest interfering cell of the current serving cell.
Step 52, acquiring data power of a Physical Downlink Shared Channel (PDSCH) and pilot power of a Common Reference Signal (CRS) of the first interfering cell on a Physical Resource Block (PRB) occupied by the current serving cell of the terminal;
step 53, obtaining a first power allocation value of the first interfering cell according to the PDSCH data power and the CRS pilot power;
step 54, dividing the data area into intervals according to the power distribution value in the received power distribution set;
it should be noted that the power allocation set is configured in advance by the base station side and is issued to the terminal.
Step 55, if the first power allocation value is within a preset interval, the interference of the first interfering cell does not exist on the PRB;
step 56, if the first power allocation value is not within a preset interval, the interference of the first interfering cell exists on the PRB.
It should be noted that what is implemented in this embodiment is how to determine whether there is interference from the strongest interfering cell according to the obtained first power allocation value, first, a data interval (i.e., (- ∞, + ∞)) is divided into intervals, for example, (- ∞, + ∞) can be divided into 3 intervals by 2 values, and optionally, the step 55 specifically includes, when implemented:
acquiring a threshold value for interval division according to a power distribution value in a received power distribution set;
and dividing the data area into a plurality of intervals according to the threshold value.
Specifically, the step of obtaining the threshold value for interval division according to the power allocation value in the received power allocation set may be implemented in the following manner:
according to the formula:
Figure BDA0000942547050000141
obtaining a threshold value for interval division;
therein, thaA first threshold value for dividing the interval; pA,aA linear value corresponding to the a-th power distribution value is represented; Δ represents a fixed constant; m represents the number of power allocation values in the power allocation set.
The implementation of the above step 55 is illustrated as follows:
assuming that M (M is less than or equal to 3) power allocation values exist in a power allocation set notified to a terminal by a high-level signaling, converting the M power allocation values into corresponding linear values of { P [)A,1,...,PA,MThen according to the converted M linear values, substituting the above formula to obtain M threshold values, namely { th }1，…，thaThe M threshold values divide (- ∞, + ∞) into M +1 intervals, i.e., { Q }0，…，QM}；
Wherein Q is0＝(-∞，th1)，QM＝[thM，+∞)，Qb＝[thb，thb+1)，1≤b≤M-1。
Among them, th is selected in the present invention1As a boundary for the presence of interference, in practical applications, a value Δ times smaller than the minimum value in the set of power allocations is chosen as a boundary, where Δ is determined by a simulation value.
When the interference judgment is carried out, if the first power distribution value belongs to the interval Q0If so, the interference of the strongest interference cell does not exist on the currently selected PRB; otherwise, the interference of the strongest interfering cell is proved to exist.
In this embodiment, the data region is divided into intervals, and then a certain interval is used as a determination interval where interference does not exist, and if the first power allocation value belongs to the determination interval, it is verified that the interference of the strongest interfering cell does not exist on the selected PRB.
Example four
As shown in fig. 6, the interference detection method according to the fourth embodiment of the present invention includes:
step 61, determining a first interference cell of a current service cell of the terminal;
wherein the first interfering cell refers to the strongest interfering cell of the current serving cell.
Step 62, acquiring data power of a Physical Downlink Shared Channel (PDSCH) and pilot power of a Common Reference Signal (CRS) of the first interfering cell on a Physical Resource Block (PRB) occupied by the current serving cell of the terminal;
it should be noted that the specific implementation manner of this step 62 is: respectively acquiring a CRS pilot sequence and a first frequency domain receiving signal of the first interference cell on a PRB; performing channel estimation on the first interference cell according to the CRS pilot sequence and the first frequency domain receiving signal to obtain a first channel estimation result; acquiring an interference covariance matrix of the first interference cell according to the first channel estimation result, the CRS pilot frequency sequence and a first frequency domain receiving signal; calculating a correlation matrix of the first frequency domain received signal according to the first frequency domain received signal; acquiring the PDSCH data power of the first interference cell according to the correlation matrix and the interference covariance matrix; and acquiring the CRS pilot frequency power of the first interference cell according to the first channel estimation result.
Step 63, acquiring a first power allocation value of the first interference cell according to the PDSCH data power and the CRS pilot power;
step 64, dividing the data area into intervals according to the power distribution value in the received power distribution set;
step 65, if the first power allocation value is not within a preset interval, acquiring an equivalent channel estimation matrix of the first interfering cell;
step 66, obtaining a second power allocation value of the first interfering cell on the PRB according to the equivalent channel estimation matrix, the correlation matrix of the first frequency domain received signal, and the interference covariance matrix.
It should be noted that, in the present embodiment, it is mainly achieved that, in the presence of interference, an accurate determination of a power allocation value on a PRB in which the interference exists is performed.
Specifically, the step 65 can be implemented as follows:
according to the formula:
Figure BDA0000942547050000151
acquiring an equivalent channel estimation matrix of the first interference cell on each codebook;
wherein Hi,effAn equivalent channel estimation matrix representing the first interference cell on the b-th codebook;
Figure BDA0000942547050000152
indicating a channel estimation result of a first interfering cell on a current PRB; wbRepresenting the value of the b-th codebook.
It should be noted that, the channel estimation result obtained by performing channel estimation on the strongest interfering cell is well known to those skilled in the art, and will not be described in detail herein.
After obtaining the equivalent estimation matrix corresponding to each codebook, the equivalent estimation matrix is used to obtain an accurate power allocation value, specifically, the step 66 may be implemented as follows:
according to the formula:
Figure BDA0000942547050000153
calculating to obtain a second power allocation value of the first interference cell on the PRB;
wherein, PARepresenting a second power allocation value; rnnIs dimension NRX×NRXThe matrix of (a) refers to the interference covariance matrix of the first interfering cell; ryyIs one NRX×NRXOf (2) matrixRefer to the correlation matrix of the first frequency domain received signal described above.
The implementation of the above steps 65 and 66 is illustrated as follows (the alternative codebook sets in this scheme are shown in table 1):
Figure BDA0000942547050000161
TABLE 1 set of codebooks
Since the autocorrelation matrices of the codebooks are equal when v is 2, the number of the equivalent codebooks in the scheme is only 5; respectively substituting 5 equivalent codebooks into the following formula 1 one by one:
equation 1:
Figure BDA0000942547050000162
5 result values are obtained respectively, and then the one having the smallest value is selected from the 5 result values as an accurate power allocation value.
As shown in fig. 7, the general process of the present invention is:
firstly, roughly estimating the power distribution value on each PRB, then judging whether the interference of the strongest interference cell exists on the corresponding PRB according to the roughly estimated result, and if not, ending the process; if the interference exists, the fine estimation of the power allocation value on the PRB with the strongest interference cell is carried out continuously, and the accurate power allocation value on the PRB is obtained.
Suppose that in an LTE system, a UE is scheduled on a PRB0-PRB9And uplink PDSCH data traffic is transmitted, assuming that the number of CRS ports is 2 at this time, the CFI is 2, and the transmission is performed in a normal CP (cyclic prefix) normal subframe, and the Network side notifies that a possible transmission mode of an interfering Cell is { TM2, TM3, TM9}, Cell ID (Cell ID), PB (Cell-level parameter, indicating power boost), the number of CRS ports, whether the transmission mode is an MBSFN (Multi-board Signal Frequency Network) subframe, and a power allocation restriction set of an adjacent Cell.
Suppose that the terminal knows the cell number of the strongest interfering cell, PB value is 0, the power allocation restriction set is { -6, -3, 0}, CRS port number is 2, and non-MBSFN subframe.
In PRBii∈{0,1,2,3,4,5,6,7,8,9}And detecting whether the interference of the strongest interference neighbor cell exists or not one by one PRB, and firstly, performing rough estimation on a power distribution value to obtain a first power distribution value. According to the high-level power distribution limit set and the recommended value of delta being 3, firstly converting each value in { -6, -3, 0} into a linear value, and sequentially: -6 to a linear value of 10^ (-6/10) ═ 0.2512, -3 to a linear value of 10^ (-3/10) ═ 0.5012, 0 to a linear value of 10^ (0/10) ═ 1.0000; threshold values obtained by interval division from the three linear values are th respectively1＝0.2512/3＝0.0837，th2＝(0.2512+0.5012)/2＝0.3762，th3(0.5012+1)/2 ═ 0.7506; the intervals for dividing the data regions are respectively obtained according to the threshold value as follows:
(-∞，0.0837)、[0.0837，0.3762)、[0.3762，0.7506)、[0.7506，+∞)。
and when the first power distribution value is in the range of (-infinity, 0.0837), judging to obtain that no interference exists on the current PRB, otherwise, judging to obtain that the interference exists on the current PRB, then traversing the codebook according to a fine estimation scheme of the power distribution value, and selecting the minimum result value corresponding to the codebook value as the fine estimated power distribution value.
According to the scheme, the power distribution value of the first interference cell on the current PRB is obtained according to the PDSCH data power and the CRS pilot frequency power of each PRB occupied by the terminal on the current service cell, and then whether the interference of the first interference cell exists on the current PRB is judged according to the power distribution value.
EXAMPLE five
As shown in fig. 8, a fifth embodiment of the present invention provides a terminal 80, including:
a first determining module 81, configured to determine a first interfering cell of a current serving cell of a terminal;
wherein the first interfering cell refers to the strongest interfering cell of the current serving cell.
A first obtaining module 82, configured to obtain data power of a physical downlink shared channel PDSCH and pilot power of a common reference signal CRS on a physical resource block PRB occupied by the current serving cell of the terminal by the first interfering cell;
a second obtaining module 83, configured to obtain a first power allocation value of the first interfering cell according to the PDSCH data power and the CRS pilot power;
a second determining module 84, configured to determine whether the interference of the first interfering cell exists on the PRB according to the first power allocation value.
Optionally, the first obtaining module 82 includes:
a first obtaining sub-module, configured to obtain a CRS pilot sequence and a first frequency domain receiving signal of the first interfering cell on a PRB, respectively;
a channel estimation submodule, configured to perform channel estimation on the first interfering cell according to the CRS pilot sequence and the first frequency domain received signal, to obtain a first channel estimation result;
a second obtaining submodule, configured to obtain PDSCH data power of the first interfering cell according to the first channel estimation result, the CRS pilot sequence, and the first frequency domain receiving signal;
and a third obtaining sub-module, configured to obtain, according to the first channel estimation result, a CRS pilot power of the first interfering cell.
Specifically, the second obtaining sub-module includes:
a first obtaining unit, configured to obtain an interference covariance matrix of the first interfering cell according to the first channel estimation result, the CRS pilot sequence, and the first frequency domain received signal;
a calculating unit, configured to calculate a correlation matrix of the first frequency domain received signal according to the first frequency domain received signal;
a second obtaining unit, configured to obtain PDSCH data power of the first interfering cell according to the correlation matrix and the interference covariance matrix.
Specifically, the first obtaining unit is configured to:
according to the formula:
Figure BDA0000942547050000181
calculating an interference covariance matrix of the first interfering cell;
wherein R isnnIs dimension NRX×NRXA matrix representing an interference covariance matrix of the first interfering cell; n is a radical ofCRS_RERepresenting the number of CRS resource units in one PRB;
Figure BDA0000942547050000182
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapFrequency domain receiving signals of a CRS part in first frequency domain receiving signals of the antenna ports;
Figure BDA0000942547050000183
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapA first channel estimation result for each antenna port;
Figure BDA0000942547050000184
is dimension NapX 1 vector, representing N on the kth CRS resource element under the current PRBapCRS pilot frequency sequences of each antenna port;
Figure BDA0000942547050000185
is dimension NRX×NapDenotes a matrix of (c) will
Figure BDA0000942547050000186
Each row of elements of and
Figure BDA0000942547050000187
multiplying each row of elements of (a); (.)HRepresenting the conjugate transpose of a matrix or vector.
Specifically, the calculation unit is configured to:
according to the formula:
Figure BDA0000942547050000188
calculating a correlation matrix of the first frequency domain received signal;
wherein R isyyIs one NRX×NRXA matrix representing a correlation matrix of the first frequency domain received signal;
Figure BDA0000942547050000191
is dimension NRXA matrix of x 1, which represents a received signal on the kth data resource unit of a first frequency domain received signal under a current PRB; n is a radical ofREThe number of the data resource units under the current PRB is shown; denotes matrix multiplication.
Specifically, the second obtaining unit is configured to:
according to the formula: p1 ═ Trace (R)yy-Rnn) Calculating to obtain the PDSCH data power of the first interference cell;
wherein P1 represents PDSCH data power of the first interfering cell; trace () represents the sum function over the diagonal elements of the matrix.
Optionally, the third obtaining sub-module includes:
a third obtaining unit, configured to obtain an autocorrelation matrix of channel estimation of the first interfering cell according to the first channel estimation result;
a fourth obtaining unit, configured to obtain CRS pilot power of the first interfering cell according to the autocorrelation matrix.
Specifically, the third obtaining unit is configured to:
according to the formula:
Figure BDA0000942547050000192
calculating to obtain an autocorrelation matrix of the channel estimate of the first interfering cell；
Wherein R isiiIs one NRX×NRXA matrix representing an autocorrelation matrix of a channel estimate of the first interfering cell; n is a radical ofCRS_RERepresenting the number of CRS resource units in one PRB;
Figure BDA0000942547050000193
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapA first channel estimation result for each antenna port; denotes matrix multiplication; (.)HRepresenting the conjugate transpose of a matrix or vector.
Specifically, the fourth obtaining unit is configured to:
according to the formula: p2 ═ Trace (R)ii) Calculating CRS pilot power of the first interference cell;
wherein P2 represents CRS pilot power of the first interfering cell; trace () represents the sum function over the diagonal elements of the matrix.
Optionally, the second obtaining module 83 is specifically configured to:
and obtaining a first power allocation value of the first interference cell by calculating the ratio of the PDSCH data power to the CRS pilot power.
Optionally, the second determining module 84 includes:
the division submodule is used for carrying out interval division on the data area according to the power distribution value in the received power distribution set;
determining a sub-module, wherein if the first power allocation value is within a preset interval, the interference of the first interference cell does not exist on the PRB;
if the first power allocation value is not within a preset interval, the interference of the first interference cell exists on the PRB.
Optionally, the partitioning sub-module includes:
a threshold value obtaining unit, configured to obtain a threshold value for interval division according to a power allocation value in the received power allocation set;
and the interval dividing unit is used for dividing the data area into a plurality of intervals according to the threshold value.
Specifically, the threshold value obtaining unit is configured to:
according to the formula:
Figure BDA0000942547050000201
obtaining a threshold value for interval division;
therein, thaA first threshold value for dividing the interval; pA,aA linear value corresponding to the a-th power distribution value is represented; Δ represents a fixed constant; m represents the number of power allocation values in the power allocation set.
It should be noted that, if the first power allocation value is not within the preset interval, the terminal further includes:
a third obtaining module, configured to obtain an equivalent channel estimation matrix of the first interfering cell;
a fourth obtaining module, configured to obtain a second power allocation value of the first interfering cell on the PRB according to the equivalent channel estimation matrix, the correlation matrix of the first frequency domain received signal, and the interference covariance matrix.
Specifically, the third obtaining module is configured to:
according to the formula:
Figure BDA0000942547050000202
acquiring an equivalent channel estimation matrix of the first interference cell on each codebook;
wherein Hi,effAn equivalent channel estimation matrix representing the first interference cell on the b-th codebook;
Figure BDA0000942547050000203
indicating a channel estimation result of a first interfering cell on a current PRB; wbRepresenting the value of the b-th codebook.
Specifically, the fourth obtaining module is specifically configured to:
according to the formula：
Figure BDA0000942547050000204
Calculating to obtain a second power allocation value of the first interference cell on the PRB;
wherein, PARepresenting a second power allocation value; rnnIs dimension NRX×NRXA matrix representing an interference covariance matrix of the first interfering cell; ryyIs one NRX×NRXRepresents a correlation matrix of the first frequency domain received signal.
It should be noted that the embodiment of the terminal is a terminal corresponding to the embodiment of the interference detection method one to one, and all implementation manners in the embodiment of the interference detection method are applicable to the embodiment of the terminal, and the same technical effect can be achieved.
EXAMPLE six
As shown in fig. 9, the present embodiment provides a terminal including:
a processor 91; and a memory 93 connected to the processor 91 through a bus interface 92, where the memory 93 is used to store programs and data used by the processor 91 in executing operations, and when the processor 91 calls and executes the programs and data stored in the memory 93, the following functional modules are implemented:
a first determining module, configured to determine a first interfering cell of a current serving cell of a terminal;
a first obtaining module, configured to obtain data power of a physical downlink shared channel PDSCH and pilot power of a common reference signal CRS on a physical resource block PRB occupied by the current serving cell of the terminal by the first interfering cell;
a second obtaining module, configured to obtain a first power allocation value of the first interfering cell according to the PDSCH data power and the CRS pilot power;
a second determining module, configured to determine whether interference of the first interfering cell exists on the PRB according to the first power allocation value.
The processor 91 is also configured to implement the functions of any other module of the terminal described above.
Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims (19)

1. An interference detection method, comprising:
determining a first interference cell of a current service cell of a terminal;
acquiring data power of a Physical Downlink Shared Channel (PDSCH) and pilot power of a Common Reference Signal (CRS) of the first interference cell on a Physical Resource Block (PRB) occupied by a current service cell of the terminal;
acquiring a first power allocation value of the first interference cell according to the PDSCH data power and the CRS pilot frequency power;
determining whether the interference of the first interference cell exists on the PRB according to the first power allocation value;
the step of obtaining the data power of the Physical Downlink Shared Channel (PDSCH) and the pilot power of the Common Reference Signal (CRS) of the first interfering cell on the Physical Resource Block (PRB) occupied by the current serving cell of the terminal comprises the following steps:
respectively acquiring a CRS pilot sequence and a first frequency domain receiving signal of the first interference cell on the PRB;
performing channel estimation on the first interfering cell according to the CRS pilot sequence and the first frequency domain receiving signal to obtain a first channel estimation result;
acquiring PDSCH data power of the first interference cell according to the first channel estimation result, the CRS pilot frequency sequence and the first frequency domain receiving signal;
and acquiring the CRS pilot frequency power of the first interference cell according to the first channel estimation result.
2. The interference detection method according to claim 1, wherein the step of obtaining PDSCH data power of the first interfering cell according to the first channel estimation result, the CRS pilot sequence and the first frequency domain received signal comprises:
acquiring an interference covariance matrix of the first interference cell according to the first channel estimation result, the CRS pilot frequency sequence and the first frequency domain receiving signal;
calculating a correlation matrix of the first frequency domain received signal according to the first frequency domain received signal;
and acquiring the PDSCH data power of the first interference cell according to the correlation matrix and the interference covariance matrix.
3. The interference detection method according to claim 1, wherein the step of obtaining the CRS pilot power of the first interfering cell according to the first channel estimation result comprises:
acquiring an autocorrelation matrix of channel estimation of the first interference cell according to the first channel estimation result;
and acquiring the CRS pilot frequency power of the first interference cell according to the autocorrelation matrix.
4. The interference detection method according to claim 3, wherein the step of obtaining the CRS pilot power of the first interfering cell according to the autocorrelation matrix specifically comprises:
according to the formula: p2 ═ Trace (R)ii) Calculating CRS pilot power of the first interference cell;
wherein P2 represents CRS pilot power of the first interfering cell; trace () represents the sum function over the diagonal elements of the matrix;
Figure FDA0003064662310000021
wherein R isiiIs one NRX×NRXA matrix representing an autocorrelation matrix of a channel estimate of the first interfering cell; n is a radical ofCRS_RERepresenting the number of CRS resource units in one PRB;
Figure FDA0003064662310000022
is dimension NRX×NapRepresents N on the kth CRS resource element under the current PRBRXA receiving antenna, NapA first channel estimation result for each antenna port; denotes matrix multiplication; (.)HRepresenting the conjugate transpose of a matrix or vector.
5. The interference detection method according to claim 1, wherein the step of obtaining the first power allocation value of the first interfering cell according to the PDSCH data power and the CRS pilot power specifically comprises:
and obtaining a first power allocation value of the first interference cell by calculating the ratio of the PDSCH data power to the CRS pilot power.
6. The interference detection method according to claim 2, wherein the step of determining whether the interference of the first interfering cell exists on the PRB according to the first power allocation value specifically includes:
dividing the data area into intervals according to the power distribution value in the received power distribution set;
if the first power allocation value is within a preset interval, the interference of the first interference cell does not exist on the PRB;
if the first power allocation value is not within a preset interval, the interference of the first interference cell exists on the PRB.
7. The interference detection method according to claim 6, wherein the step of partitioning the data region into intervals according to the power allocation values in the received power allocation set comprises:
acquiring a threshold value for interval division according to a power distribution value in a received power distribution set;
and dividing the data area into a plurality of intervals according to the threshold value.
8. The interference detection method according to claim 7, wherein the step of obtaining the threshold for interval division according to the power allocation value in the received power allocation set specifically comprises:
according to the formula:
Figure FDA0003064662310000031
obtaining a threshold value for interval division;
therein, thaA first threshold value for dividing the interval; pA,aA linear value corresponding to the a-th power distribution value is represented; Δ represents a fixed constant; m represents the number of power allocation values in the power allocation set.
9. The interference detection method according to claim 6, wherein if the first power allocation value is not within a preset interval, the interference detection method further comprises:
acquiring an equivalent channel estimation matrix of the first interference cell;
and acquiring a second power allocation value of the first interference cell on the PRB according to the equivalent channel estimation matrix, the correlation matrix of the first frequency domain received signal and the interference covariance matrix.
10. The interference detection method according to claim 9, wherein the step of obtaining the equivalent channel estimation matrix of the first interfering cell specifically includes:
according to the formula:
Figure FDA0003064662310000032
acquiring an equivalent channel estimation matrix of the first interference cell on each codebook;
wherein Hi,effAn equivalent channel estimation matrix representing the first interference cell on the b-th codebook;
Figure FDA0003064662310000033
indicating a channel estimation result of a first interfering cell on a current PRB; wbRepresenting the value of the b-th codebook.
11. A terminal, comprising:
a first determining module, configured to determine a first interfering cell of a current serving cell of a terminal;
a first obtaining module, configured to obtain data power of a physical downlink shared channel PDSCH and pilot power of a common reference signal CRS on a physical resource block PRB occupied by the current serving cell of the terminal by the first interfering cell;
a second obtaining module, configured to obtain a first power allocation value of the first interfering cell according to the PDSCH data power and the CRS pilot power;
a second determining module, configured to determine whether interference of the first interfering cell exists on the PRB according to the first power allocation value;
the first obtaining module comprises:
a first obtaining sub-module, configured to obtain a CRS pilot sequence and a first frequency domain receiving signal of the first interfering cell on the PRB, respectively;
a channel estimation submodule, configured to perform channel estimation on the first interfering cell according to the CRS pilot sequence and the first frequency domain received signal, to obtain a first channel estimation result;
a second obtaining submodule, configured to obtain PDSCH data power of the first interfering cell according to the first channel estimation result, the CRS pilot sequence, and the first frequency domain receiving signal;
and a third obtaining sub-module, configured to obtain, according to the first channel estimation result, a CRS pilot power of the first interfering cell.
12. The terminal of claim 11, wherein the second obtaining sub-module comprises:
a first obtaining unit, configured to obtain an interference covariance matrix of the first interfering cell according to the first channel estimation result, the CRS pilot sequence, and the first frequency domain received signal;
a calculating unit, configured to calculate a correlation matrix of the first frequency domain received signal according to the first frequency domain received signal;
a second obtaining unit, configured to obtain PDSCH data power of the first interfering cell according to the correlation matrix and the interference covariance matrix.
13. The terminal of claim 11, wherein the third obtaining sub-module comprises:
a third obtaining unit, configured to obtain an autocorrelation matrix of channel estimation of the first interfering cell according to the first channel estimation result;
a fourth obtaining unit, configured to obtain CRS pilot power of the first interfering cell according to the autocorrelation matrix.
14. The terminal of claim 11, wherein the second obtaining module is specifically configured to:
and obtaining a first power allocation value of the first interference cell by calculating the ratio of the PDSCH data power to the CRS pilot power.
15. The terminal of claim 12, wherein the second determining module comprises:
the division submodule is used for carrying out interval division on the data area according to the power distribution value in the received power distribution set;
determining a sub-module, wherein if the first power allocation value is within a preset interval, the interference of the first interference cell does not exist on the PRB;
if the first power allocation value is not within a preset interval, the interference of the first interference cell exists on the PRB.
16. The terminal of claim 15, wherein the partitioning sub-module comprises:
a threshold value obtaining unit, configured to obtain a threshold value for interval division according to a power allocation value in the received power allocation set;
and the interval dividing unit is used for dividing the data area into a plurality of intervals according to the threshold value.
17. The terminal of claim 16, wherein the threshold acquisition unit is specifically configured to:
according to the formula:
Figure FDA0003064662310000051
obtaining a threshold value for interval division;
therein, thaA first threshold value for dividing the interval; pA,aA linear value corresponding to the a-th power distribution value is represented; Δ represents a fixed constant; m represents the number of power allocation values in the power allocation set.
18. The terminal of claim 15, further comprising:
a third obtaining module, configured to obtain an equivalent channel estimation matrix of the first interfering cell;
a fourth obtaining module, configured to obtain a second power allocation value of the first interfering cell on the PRB according to the equivalent channel estimation matrix, the correlation matrix of the first frequency domain received signal, and the interference covariance matrix.
19. The terminal of claim 18, wherein the third obtaining module is specifically configured to:
according to the formula:
Figure FDA0003064662310000052
acquiring an equivalent channel estimation matrix of the first interference cell on each codebook;
wherein Hi,effAn equivalent channel estimation matrix representing the first interference cell on the b-th codebook;
Figure FDA0003064662310000053
indicating a channel estimation result of a first interfering cell on a current PRB; wbRepresenting the value of the b-th codebook.
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