CN115967947B

CN115967947B - Intermodulation product interference determination method, intermodulation product interference determination device, electronic equipment and readable storage medium

Info

Publication number: CN115967947B
Application number: CN202310244979.6A
Authority: CN
Inventors: 冯健; 胡俊锋; 陈禹平; 李立江; 陈楚链; 宋雅
Original assignee: China Tower Co Ltd
Current assignee: China Tower Co Ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-05-09
Anticipated expiration: 2043-03-15
Also published as: CN115967947A

Abstract

The invention provides an intermodulation product interference determining method, an intermodulation product interference determining device, electronic equipment and a readable storage medium, and relates to the technical field of communication, wherein the intermodulation product interference determining method comprises the following steps: acquiring signal source power, a first frequency range of uplink frequency, downlink center frequency and frequency bandwidth of each base station in L base stations, and a coefficient matrix of an n-order intermodulation product; generating a target center frequency matrix based on the downlink center frequency and the coefficient matrix of each base station; generating a target bandwidth matrix based on the frequency bandwidth and the coefficient matrix of each base station; calculating a second frequency range of the n-order intermodulation products based on the target center frequency matrix and the target bandwidth matrix; in the case where there is an overlap region between the second frequency range and the first frequency range, an interference noise value of the n-order intermodulation product is calculated based on the first frequency range, the second frequency range, and the signal source power. According to the invention, the coefficient matrix, the target center frequency matrix and the target bandwidth matrix are used for calculation, so that the time for determining intermodulation product interference is shortened.

Description

Intermodulation product interference determination method, intermodulation product interference determination device, electronic equipment and readable storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for determining intermodulation product interference, an electronic device, and a readable storage medium.

Background

In indoor signal distribution systems, intermodulation products are generated due to the presence of different signal source inputs, and the intermodulation products may overlap with the upstream frequencies of the signal sources in a frequency range that would interfere with communications. The interference of each intermodulation product is calculated in the related art by adopting a serial cyclic algorithm. However, as the input signal sources increase, the types of intermodulation products also increase, including 2-order intermodulation products, 3-order intermodulation products, and 5-order intermodulation products (2-order intermodulation products are intermodulation products generated by two signal sources, 3-order intermodulation products are intermodulation products generated by three signal sources, and 5-order intermodulation products are intermodulation products generated by five signal sources). In the related art, since serial cyclic algorithm calculation is adopted, the calculation amount is large when the interference of the third-order intermodulation products and the fifth-order intermodulation products is calculated, and the time for determining the interference of the intermodulation products is long.

It can be seen that the prior art has the problem of a longer time to determine intermodulation product interference.

Disclosure of Invention

The embodiment of the invention provides an intermodulation product interference determining method, an intermodulation product interference determining device, electronic equipment and a readable storage medium, which are used for solving the problem that the intermodulation product interference determining time is long in the prior art.

To solve the above problems, the present invention is achieved as follows:

in a first aspect, an embodiment of the present invention provides a method for determining intermodulation product interference, including:

acquiring signal source power, a first frequency range of uplink frequency, downlink center frequency and frequency bandwidth corresponding to the downlink center frequency of each of L base stations, and a coefficient matrix of n-order intermodulation products, wherein the n-order intermodulation products are intermodulation products generated by interaction of n signal sources in the L base stations, the coefficient matrix is used for representing calculation coefficients of the n-order intermodulation products corresponding to the signal sources, L is a positive integer greater than 2, n is a positive integer 2, 3 or 5, n is smaller than L, and each row in the coefficient matrix is used for representing coefficients of n signal sources corresponding to one n-order intermodulation product;

generating an initial center frequency matrix based on the downlink center frequency of each base station, wherein each column of the initial center frequency matrix is used for representing the downlink center frequencies of n signal sources corresponding to one n-order intermodulation product;

Multiplying the initial center frequency matrix and the coefficient matrix to generate a target center frequency matrix, wherein the target center frequency matrix is used for representing the frequencies of n-order intermodulation products generated by n signal sources in the L base stations;

generating a target bandwidth matrix based on the frequency bandwidth of each base station, the initial center frequency matrix and the coefficient matrix, wherein the target bandwidth matrix is used for representing the frequency bandwidths of n-order intermodulation products generated by n signal sources in the L base stations, and the target bandwidth matrix corresponds to the same signal source at the same row and column position with the target center frequency matrix;

calculating a second frequency range of the n-order intermodulation products based on the target center frequency matrix and the target bandwidth matrix;

calculating interference noise values of the n-order intermodulation products based on the first frequency range, the second frequency range and the signal source power under the condition that an overlapping area exists between the second frequency range and the first frequency range, wherein the interference noise values are used for representing interference conditions of the n-order intermodulation products on L signal sources;

determining coefficients of n signal sources of the n-order intermodulation products based on the number of lines of the n-order intermodulation products in the target center frequency matrix or the target bandwidth matrix and the coefficient matrix under the condition that the interference noise value corresponding to the n-order intermodulation products is larger than a set threshold;

Determining the downlink center frequencies of n signal sources of the n-order intermodulation products based on the number of columns of the n-order intermodulation products in the target center frequency matrix or the target bandwidth matrix and the initial center frequency matrix.

Optionally, the generating a target bandwidth matrix based on the frequency bandwidth of each base station, the initial center frequency matrix and the coefficient matrix includes:

determining an initial bandwidth matrix based on the frequency bandwidth of each base station and the initial center frequency matrix, wherein the initial bandwidth matrix corresponds to the same signal source at the same row and column position as the initial center frequency matrix, and the initial bandwidth matrix is used for representing the frequency bandwidth of each base station in different n signal source combinations;

multiplying the coefficient matrix by the absolute value of the initial bandwidth matrix to obtain a target bandwidth matrix of the n-order intermodulation products.

Optionally, the calculating, based on the first frequency range, the second frequency range, and the signal source power, an interference noise value of the nth order intermodulation product includes:

calculating a target intensity ratio based on the overlapping region and the second frequency range, wherein the target intensity ratio is used for representing the signal power intensity ratio of the overlapping region and the n-order intermodulation product;

Calculating the power intensity of the n-order intermodulation products based on the coefficient matrix and the signal source power;

the product of the target strength ratio and the power strength of the n-order intermodulation products is set to the interference noise value.

Optionally, the calculating, based on the overlapping area and the second frequency range, a target intensity ratio includes:

calculating a first ratio of the overlapping region in a first region of the second frequency range and a second ratio of the overlapping region in a second region of the second frequency range based on the overlapping region and the second frequency range, wherein the first region and the second region are regions of the second frequency range, the first region is positioned on two sides of the second region, and the first region is larger than the second region;

and setting the sum of the product of the first ratio and the first power duty ratio of the first area and the product of the second ratio and the second power duty ratio of the second area as the target intensity ratio, wherein the first power duty ratio and the second power duty ratio are the same.

Optionally, the calculating, based on the coefficient matrix and the signal source power, the power strength of the n-order intermodulation product includes:

Acquiring intermodulation suppression degrees and rated input carrier power of tested devices for receiving L signal sources, wherein the tested devices are used for representing devices for receiving the signal sources of each base station in the L base stations;

bringing the intermodulation suppression degree, the rated input carrier power, the coefficient matrix and the signal source power into preset formulas to obtain the power strength of the n-order intermodulation products, wherein the preset formulas comprise a first formula corresponding to the case that n is 2 or 3 and a second formula corresponding to the case that n is 5, and the power strength of the n-order intermodulation products is calculated through the first formula as follows:

；

P _RIM for the power strength, RIM is the intermodulation suppression degree, P ₁ For the rated input carrier power, O ₁ To O _n For the coefficient, P _f1 To P _fn Is the power of the signal source;

calculating the power strength of the n-order intermodulation products by the second formula is represented as follows:

；

the K is a constant.

Optionally, the calculating the second frequency range of the nth order intermodulation product based on the target center frequency matrix and the target bandwidth matrix includes:

calculating a first product value of the target bandwidth matrix and a first weighted value, and setting a difference value between the target center frequency matrix and the first product value as a minimum value of the second frequency range;

And calculating a second product value of the target bandwidth matrix and a second weighted value, and setting the sum of the target center frequency matrix and the second product value as the maximum value of the second frequency range.

In a second aspect, an embodiment of the present invention further provides an intermodulation product interference determining apparatus, including:

the system comprises an acquisition module, a coefficient matrix, a data processing module and a data processing module, wherein the acquisition module is used for acquiring signal source power, a first frequency range of uplink frequency, downlink center frequency and frequency bandwidth corresponding to the downlink center frequency of each of L base stations, and a coefficient matrix of n-order intermodulation products, the n-order intermodulation products are intermodulation products generated by interaction of n signal sources in the L base stations, the coefficient matrix is used for representing calculation coefficients of the n-order intermodulation products corresponding to the signal sources, L is a positive integer greater than 2, n is a positive integer 2, 3 or 5, n is smaller than L, and each row in the coefficient matrix is used for representing coefficients of n signal sources corresponding to one n-order intermodulation product;

the first generation module is used for generating an initial center frequency matrix based on the downlink center frequency of each base station, and each column of the initial center frequency matrix is used for representing the downlink center frequencies of n signal sources corresponding to one n-order intermodulation product;

The second generation module is used for multiplying the initial center frequency matrix and the coefficient matrix to generate a target center frequency matrix, and the target center frequency matrix is used for representing the frequencies of n-order intermodulation products generated by n signal sources in the L base stations;

a third generating module, configured to generate a target bandwidth matrix based on the frequency bandwidth of each base station, the initial center frequency matrix, and the coefficient matrix, where the target bandwidth matrix is used to characterize frequency bandwidths of n-order intermodulation products generated by n signal sources in the L base stations, and the target bandwidth matrix corresponds to the same signal source at a position of the same rank as the target center frequency matrix;

a first calculating module, configured to calculate a second frequency range of the nth order intermodulation product based on the target center frequency matrix and the target bandwidth matrix;

a second calculation module, configured to calculate, based on the first frequency range, the second frequency range, and the signal source power, an interference noise value of the nth order intermodulation product, where the interference noise value is used to characterize interference conditions of the nth order intermodulation product on L signal sources, where an overlap region exists between the second frequency range and the first frequency range;

The first processing module is used for determining coefficients of n signal sources of the n-order intermodulation products based on the line number of the n-order intermodulation products in the target center frequency matrix or the target bandwidth matrix and the coefficient matrix under the condition that the interference noise value corresponding to the n-order intermodulation products is larger than a set threshold;

and the second processing module is used for determining the downlink center frequencies of the n signal sources of the n-order intermodulation products based on the column numbers of the n-order intermodulation products in the target center frequency matrix or the target bandwidth matrix and the initial center frequency matrix.

Optionally, the third generating module includes:

the first processing sub-module is used for determining an initial bandwidth matrix based on the frequency bandwidth of each base station and the initial center frequency matrix, wherein the initial bandwidth matrix corresponds to the same signal source at the same row and column position as the initial center frequency matrix, and the initial bandwidth matrix is used for representing the frequency bandwidth of each base station in different n signal source combinations;

and the second processing submodule is used for multiplying the coefficient matrix by the absolute value of the initial bandwidth matrix to obtain the target bandwidth matrix of the n-order intermodulation product.

Optionally, the second computing module includes:

a first calculation submodule, configured to calculate a target strength ratio based on the overlap region and the second frequency range, where the target strength ratio is used to characterize a signal power strength ratio of the overlap region and the n-order intermodulation product;

the second calculation sub-module is used for calculating the power intensity of the n-order intermodulation products based on the coefficient matrix and the signal source power;

and a third calculation sub-module, configured to set a product of the target intensity ratio and the power intensity of the nth order intermodulation product to the interference noise value.

Optionally, the first computing submodule includes:

the first calculating unit is configured to calculate, based on the overlapping region and the second frequency range, a first ratio of the overlapping region in a first region of the second frequency range and a second ratio of the overlapping region in a second region of the second frequency range, where the first region and the second region are regions of the second frequency range, the first region is located at two sides of the second region, and the first region is larger than the second region;

and a second calculating unit, configured to set a sum of products of the first ratio and the first power duty ratio of the first area and products of the second ratio and the second power duty ratio of the second area as the target intensity ratio, where the first power duty ratio and the second power duty ratio are the same.

Optionally, the second computing submodule includes:

the device comprises an acquisition unit, a detection unit and a control unit, wherein the acquisition unit is used for acquiring intermodulation suppression degree and rated input carrier power of a tested device for receiving L signal sources, and the tested device is used for representing the device for receiving the signal source of each base station in the L base stations;

a third calculation unit, configured to bring the intermodulation suppression degree, the rated input carrier power, the coefficient matrix, and the signal source power into a preset formula, to obtain a power strength of the n-order intermodulation product, where the preset formula includes a first formula corresponding to a case where n is 2 or 3, and a second formula corresponding to a case where n is 5, where calculating, by using the first formula, the power strength of the n-order intermodulation product is represented as follows:

；

；

the K is a constant.

Optionally, the first computing module includes:

a fourth calculation sub-module, configured to calculate a first product value of the target bandwidth matrix and a first weighted value, and set a difference value between the target center frequency matrix and the first product value as a minimum value of the second frequency range;

And a fifth calculation sub-module, configured to calculate a second product value of the target bandwidth matrix and a second weight value, and set a sum of the target center frequency matrix and the second product value as a maximum value of the second frequency range.

In a third aspect, an embodiment of the present invention further provides an electronic device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, the computer program implementing the steps in the intermodulation product interference determining method according to the first aspect, when executed by the processor.

In a fourth aspect, embodiments of the present invention further provide a readable storage medium storing a program, which when executed by a processor implements the steps in the intermodulation product interference determining method according to the first aspect described above.

In the embodiment of the invention, an initial center frequency matrix is generated based on the downlink center frequency of each base station; multiplying the initial center frequency matrix by the coefficient matrix to generate a target center frequency matrix; generating a target bandwidth matrix based on the frequency bandwidth, the initial center frequency matrix and the coefficient matrix of each base station; calculating a second frequency range of the n-order intermodulation products based on the target center frequency matrix and the target bandwidth matrix; under the condition that an overlapping area exists between the second frequency range and the first frequency range, the interference noise value of the n-order intermodulation products is calculated based on the first frequency range, the second frequency range and the signal source power, the interference noise value is calculated through the coefficient matrix, the target bandwidth matrix and the target center frequency matrix, the coefficient matrix, the target bandwidth matrix and the target center frequency matrix can rapidly position the coefficients, the bandwidths and the frequencies corresponding to the intermodulation products, the calculation speed is further improved, and the time for determining the interference of the intermodulation products is shortened.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of the generation of intermodulation products provided by an embodiment of the present invention;

fig. 2 is a schematic diagram of intermodulation products overlapping with an uplink carrier signal according to an embodiment of the present invention;

fig. 3 is a flowchart of a method for determining intermodulation product interference according to an embodiment of the present invention;

fig. 4 is a schematic diagram of intermodulation products provided by an embodiment of the present invention that do not overlap with a signal source;

fig. 5 is a schematic diagram of power distribution of an uplink frequency and an nth order intermodulation product of a base station according to an embodiment of the present invention;

fig. 6 is a schematic diagram of the power distribution of the n-order intermodulation products provided by an embodiment of the present invention;

fig. 7 is a block diagram of an intermodulation product interference determining apparatus according to an embodiment of the present invention;

fig. 8 is a block diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the roomIn the internal signal distribution system, as shown in fig. 1, at least two carrier signals (carrier signal F ₁ And carrier signal F ₂ ) In the case of (2) intermodulation products are generated due to non-linearities in the carrier signal. The signal sources input to the antennas in the indoor signal distribution system include a plurality of antennas, such as shown in the following table,

interaction between different signal sources generates intermodulation products. For the transmission device, intermodulation products can be detected in both the uplink direction and the downlink direction, but intermodulation products in the uplink direction are received by other uplink receivers, and as the frequency of intermodulation products overlaps with the frequency of an uplink carrier signal, as shown in fig. 2, the sensitivity of the receiver generates interference influence, and the intermodulation products causing interference need to be determined, so that continuous interference is avoided. The matrix can rapidly locate the relevant parameters of each carrier signal, so that a large amount of calculation is avoided, the calculation speed can be increased, and the time for determining intermodulation products causing interference can be shortened, and the method is particularly shown in the following embodiment.

Referring to fig. 3, fig. 3 is a flowchart of a method for determining intermodulation product interference according to an embodiment of the present invention, as shown in fig. 3, including the following steps:

step 301, obtaining signal source power, a first frequency range of uplink frequency, a downlink center frequency and a frequency bandwidth corresponding to the downlink center frequency of each of L base stations, and a coefficient matrix of n-order intermodulation products, where the n-order intermodulation products are intermodulation products generated by interaction of n signal sources in the L base stations, the coefficient matrix is used to represent calculation coefficients of the signal sources corresponding to the n-order intermodulation products, where L is a positive integer greater than 2, n is a positive integer 2, 3 or 5, and n is less than L, and each row in the coefficient matrix is used to represent coefficients of n signal sources corresponding to one n-order intermodulation product.

The L base stations are base stations that provide carrier signals in one indoor signal distribution system. Each base station provides a downlink carrier signal and an uplink carrier signal, the frequency ranges of the carrier signals corresponding to different base stations are different, and the signal source powers corresponding to different base stations are also different.

The n-order intermodulation products are intermodulation products generated by interaction of different signal sources, and comprise 2-order intermodulation products, 3-order intermodulation products and 5-order intermodulation products. The frequency ranges of different 2-order intermodulation products generated by interaction of different signal sources are different, the frequency ranges of different 3-order intermodulation products generated by interaction of different signal sources are different, the frequency ranges of different 5-order intermodulation products generated by interaction of different signal sources are different, the frequency ranges of 2-order intermodulation products, 3-order intermodulation products and 5-order intermodulation products are different, and in the process of determining interference, interference generated by each intermodulation product needs to be determined, and the details of the following embodiments are described.

The coefficient matrix is a calculation coefficient of a signal source corresponding to the n-order intermodulation product, and in the related art, the center frequency corresponding to the n-order intermodulation product is calculated by calculating the coefficient and the center frequency of a downlink carrier of the signal source corresponding to the n-order intermodulation product. For example, the first signal source and the second signal source interact to generate a 2 nd order intermodulation product, the center frequency of which 2 nd order intermodulation product can be calculated by equation one:

PIM ₂ =O ₁ ×f ₁ +O ₂ ×f ₂ ；

wherein PIM ₂ Center frequency of intermodulation product of 2 nd order, f ₁ Is the center frequency f of the downlink carrier of the first signal source ₂ Is the center frequency of the downlink carrier of the second signal source, O ₁ And O ₂ In order to calculate the coefficient of the coefficient,

。

it will be appreciated that the co-action between the carrier signals of different base stations produces n-order intermodulation products, including 2-order intermodulation products, 3-order intermodulation products, and 5-order intermodulation products, the corresponding coefficient matrices also differ for the different n-order intermodulation products. Wherein the coefficient matrix O of the intermodulation products of order n _m×n As expressed by equation two:

；

wherein,,

，/>

，/>

for calculating the coefficients there is +.>

And->

，

And m is a positive integer greater than 0.

The first frequency range of the uplink frequency is the frequency range of the uplink carrier signal of the signal source of each base station in the L base stations, and the first frequency range comprises a starting frequency and a terminating frequency; the downlink center frequency is the center frequency of an uplink carrier signal of a signal source of each base station in the L base stations; the frequency bandwidth is the bandwidth of the uplink carrier signal of the signal source of each of the L base stations. It should be appreciated that the frequency range, including the start frequency and the end frequency, of each of the L base stations may be determined by the downlink center frequency and the frequency bandwidth. The second frequency range of intermodulation products is determined by the downstream center frequency and the frequency bandwidth, and further it is determined whether there is an overlap with the first frequency range of the upstream frequency, and the subsequent embodiments are added.

Step 302, generating an initial center frequency matrix based on the downlink center frequency of each base station, where each column of the initial center frequency matrix is used to represent the downlink center frequencies of n signal sources corresponding to one n-order intermodulation product.

The initial center frequency matrix comprises downlink center frequencies of n signal source combinations in L signal sources, each signal source combination generates an n-order intermodulation product, and the center frequencies of the n-order intermodulation products can be calculated through the downlink center frequencies of the n signal sources in the signal source combination and the calculation coefficients.

Wherein, an initial center frequency matrix F _n×k Is represented by the following formula three:

；

in the third formula of the present invention,

，/>

，/>

for the downlink center frequency of one of the L signal sources, k is the combined number of the generated n-order intermodulation products of the different signal sources. It will be appreciated that the different n-order intermodulation products differ in terms of n, as do the initial center frequency matrices they construct.

Step 303, multiplying the initial center frequency matrix and the coefficient matrix to generate a target center frequency matrix, where the target center frequency matrix is used to characterize the frequencies of n-order intermodulation products generated by n signal sources in the L base stations.

The target center frequency matrix includes frequencies corresponding to different n-order intermodulation products. It will be appreciated that different n-order intermodulation products are generated for different signal source interactions, with differences in their center frequencies. In this case, since there are L signal sources of the base station, intermodulation products may be generated between different signal sources, so that the number of different intermodulation products is different. For example, there is a total in an indoor signal distribution system

Second order intermodulation products>

Third order intermodulation products +.>

Five-order intermodulation products.

Specifically, multiplying the coefficient matrix by the initial center frequency matrix to obtain a target center frequency matrix of the n-order intermodulation products. The coefficient matrix is a matrix of formula two, the initial center frequency matrix is a matrix of formula three, and the coefficient matrix is multiplied by the initial center frequency matrix to obtain a matrix of which the target center frequency matrix is formula three, namely:

O _m×n ×F _n×k =R _m×k ；

the downlink center frequency of the signal source is the center frequency of the downlink carrier signal, and the frequency of the n-order intermodulation products is the center frequency. Target center frequency matrix R _m×k Can be represented by the following equation four:

；

in the fourth formula of the formula,

，/>

，/>

k is the combined number of different signal sources that produce the n-order intermodulation products for the frequency of the n-order intermodulation products. For example, for intermodulation products of order 2, +. >

The method comprises the steps of carrying out a first treatment on the surface of the For intermodulation products of 3 rd order->

The method comprises the steps of carrying out a first treatment on the surface of the For intermodulation products of order 5->

。

Step 304, generating a target bandwidth matrix based on the frequency bandwidth of each base station, the initial center frequency matrix and the coefficient matrix, where the target bandwidth matrix is used to characterize the frequency bandwidths of n-order intermodulation products generated by n signal sources in the L base stations, and the target bandwidth matrix and the target center frequency matrix correspond to the same signal source at the same row and column position.

The target bandwidth matrix includes bandwidths of frequencies corresponding to different n-order intermodulation products. It will be appreciated that since different n-order intermodulation products are generated for different signal source interactions, there is also a difference in the bandwidths of their frequencies. And determining the frequency range corresponding to the n-order intermodulation products by determining the bandwidths of the downlink center frequencies corresponding to different n-order intermodulation products and the downlink center frequencies corresponding to the n-order intermodulation products.

Wherein the target bandwidth matrix may be represented by the following formula five:

；

in the fifth formula, the first formula is,

，/>

，/>

k is the combined number of n-order intermodulation products generated for different signal sources, which is the bandwidth of the frequency of the n-order intermodulation products.

Further, the number of rows and columns of the target bandwidth matrix is the same as that of the target center frequency matrix, the same n-order intermodulation products are corresponding to the same row and column positions of the target bandwidth matrix and the target center frequency matrix, and the downlink center frequency and the bandwidth of the downlink center frequency corresponding to the n-order intermodulation products are rapidly determined by determining the row and column positions of the matrix.

Step 305, calculating a second frequency range of the n-order intermodulation products based on the target center frequency matrix and the target bandwidth matrix;

it should be understood that the target center frequency matrix includes the frequency of each nth order intermodulation product, and the target bandwidth matrix includes the bandwidth of the frequency of each nth order intermodulation product, and the second frequency range corresponding to the nth order intermodulation product can be determined by the parameters of the same row and column positions of the target bandwidth matrix and the target center frequency matrix, which will be described in detail in the following embodiments.

Further, determining the target center frequency matrix, the target bandwidth matrix, and calculating the second frequency range of the n-order intermodulation products based on the target center frequency matrix and the target bandwidth matrix may be implemented by calling a main flow PACKage, that is, an underlying scientific calculation library (for example, a basic Linear algebraic subroutine library (Basic Linear Algebra Subprograms, BLAS) and a Linear algebraic database (LAPACK)), and performing parallel distributed calculation by using multiple processors after vectorization, so as to improve the operation efficiency.

Step 306, calculating interference noise values of the nth order intermodulation products based on the first frequency range, the second frequency range and the signal source power, where there is an overlapping area between the second frequency range and the first frequency range, the interference noise values being used to characterize interference conditions of the nth order intermodulation products to L signal sources.

After calculating the second frequency range of the nth order intermodulation products, it may be determined whether an overlap region exists by comparing the second frequency range of the nth order intermodulation products with the first frequency ranges of the uplink frequencies of the signal sources of the L base stations. In the case that there is no overlap between the second frequency range and the first frequency range, the intermodulation products of order n will not interfere with the uplink frequency, and there is no need to determine the interference noise value.

For example, as shown in FIG. 4, the bandwidths of the input signal source a and the signal source B are respectively B ₁ And B ₂ 3 rd order intermodulation product PIM _3-1 Is 2B ₁ +B ₂ 3 rd order intermodulation product PIM _3-2 Is 2B ₂ +B ₁ 5 th order intermodulation product PIM _5-3 Is 3B ₁ +2B ₂ 5 th order intermodulation product PIM _5-4 Is 3B ₂ +2B ₁ Input, inputThere is no overlap area between the signal source, the 3-order intermodulation products and the 5-order intermodulation products, and the n-order intermodulation products do not interfere with the uplink frequency.

Further, in the case that the second frequency range and the first frequency range have overlapping areas, the n-order intermodulation products will interfere with the uplink frequency, but since the device has a certain anti-interference capability, it is further required to determine the interference noise value of the n-order intermodulation products, and determine whether the n-order intermodulation products have a substantial influence, and the detailed determination process is described in the following embodiments.

The indoor signal distribution system comprises a base station, an indoor signal distribution system, a plurality of n-order intermodulation products, an interference noise value and a first frequency range, wherein the whole indoor signal distribution system possibly has an overlapping area between the plurality of n-order intermodulation products and a first frequency range of an uplink frequency, the plurality of n-order intermodulation products are required to be ordered according to the interference noise value, and the n-order intermodulation products which affect the base station most seriously are determined.

Illustratively, the initial base station thermal noise is calculated by the following formula:

initial base station thermal noise (in dBm) = -174+10×log (base station signal source bandwidth) +2dBm

Under the condition that an overlapping area exists between an n-order intermodulation product and a first frequency range of an uplink frequency, thermal noise of a base station is infected, and at the moment, the overall noise of the base station after interference is as follows:

post-interference base station total noise (in mw) =initial base station thermal noise (in mw) +Σ interference noise value (in mw)

At this time, the base station has a background noise degradation rise value of:

base station integral noise (in dBm) after noise floor degradation rise (in dB) =interference-initial base station thermal noise (in dBm)

When the bottom noise degradation rises above the threshold, quality influence is caused on the uplink frequency of the base station, in this case, a plurality of n-order intermodulation products are required to be ordered according to the interference noise value, and the n-order intermodulation product which affects the base station most seriously is determined so as to carry out targeted adjustment and investigation.

Step 307, determining coefficients of n signal sources of the n-order intermodulation products based on the number of lines of the n-order intermodulation products in the target center frequency matrix or the target bandwidth matrix and the coefficient matrix, where the interference noise value corresponding to the n-order intermodulation products is greater than a set threshold.

Step 308, determining downlink center frequencies of n signal sources of the n-order intermodulation products based on the number of columns of the n-order intermodulation products in the target center frequency matrix or the target bandwidth matrix and the initial center frequency matrix.

It will be appreciated that in the event that the interference noise value is greater than the set threshold, the n-order intermodulation products have an impact on signal transmission, in which case the source of the n-order intermodulation products, i.e., the downstream center frequencies of the n signal sources forming the n-order intermodulation products, and the coefficients, need to be determined.

The method comprises the steps that the number of lines in a target center frequency matrix and a target bandwidth matrix corresponds to the number of lines in a coefficient matrix, the number of columns in the target center frequency matrix and the target bandwidth matrix corresponds to the number of columns in an initial center frequency matrix, and under the condition that n signal sources of n-order products need to be determined, the coefficients of the n signal sources are determined in the coefficient matrix according to the number of lines of the n-order products as indexes; according to the number of columns of the n-order products serving as indexes, coefficients of n signal sources are determined in the initial center frequency matrix, so that complicated calculation is reduced, and the determination efficiency is improved.

In one embodiment, the generating the target bandwidth matrix based on the frequency bandwidth of each base station, the initial center frequency matrix, and the coefficient matrix includes:

The initial bandwidth matrix and the initial center frequency matrix correspond to the same signal source at the same row and column position, and the downlink center frequency is replaced by the bandwidth corresponding to the downlink center frequency through the constructed initial center frequency matrix, so that the initial bandwidth matrix can be obtained.

For example, if the initial center frequency matrix is formula three, the corresponding initial bandwidth matrix B _n×k The following formula six:

；

in the sixth formula, the first formula is,

，/>

，/>

the bandwidth of the downlink center frequency of one signal source in the L signal sources is used, and the initial center frequency matrix and the initial bandwidth matrix correspond to the same signal source at the same row and column position.

The process of multiplying the absolute value of the coefficient matrix and the initial bandwidth matrix to obtain the target bandwidth matrix of the n-order intermodulation product is as follows:

；

Wherein the product of each row in the coefficient matrix and each column in the initial bandwidth matrix is the bandwidth of an n-order intermodulation product.

In the embodiment of the invention, an initial bandwidth matrix is determined based on the frequency bandwidth and the initial center frequency matrix of each base station, the initial bandwidth matrix and the initial center frequency matrix correspond to the same signal source at the same row and column position, and the initial bandwidth matrix is used for representing the frequency bandwidth of each base station in different n signal source combinations; the absolute values of the coefficient matrix and the initial bandwidth matrix are multiplied to obtain a target bandwidth matrix of the n-order intermodulation products, so that the product of each row in the coefficient matrix and each column in the initial bandwidth matrix is the bandwidth of one n-order intermodulation product, the bandwidths of different signal sources corresponding to one n-order intermodulation product can be rapidly determined through the initial bandwidth matrix, and the interference determining time is further shortened.

In one embodiment, the calculating the interference noise value of the nth order intermodulation product based on the first frequency range, the second frequency range, and the signal source power comprises:

It should be appreciated that, in the case where there is an overlap region between the first frequency range and the second frequency range, the overlap region characterizes the interference strength of the n-order intermodulation products on the uplink signal, and by based on the overlap region and the second frequency range, the target strength ratio of the power of the n-order intermodulation products interfering with the uplink signal can be calculated, which is described in the following embodiments.

Since the power of the uplink frequency (i.e. the signal source power) is obtained from L base stations, the power strength of the n-order intermodulation products can be calculated by generating the signal source power of the n-order intermodulation products, which is described in the following embodiments.

Further, after the power intensity of the n-order intermodulation products is obtained, the interference noise value is obtained by multiplying the target intensity ratio obtained by calculation, and the specific process is as follows:

interference noise value=p _RIM X target intensity ratio;

P _RIM for the power strength of the intermodulation products of order n, the interference noise value and P _RIM Is in mw.

In the embodiment of the invention, the target intensity ratio is calculated based on the overlapping area and the second frequency range, and the target intensity ratio is used for representing the signal power intensity ratio of the overlapping area and the n-order intermodulation products; calculating to obtain the power intensity of the n-order intermodulation products based on the coefficient matrix and the signal source power; and then the product of the target intensity ratio and the power intensity of the n-order intermodulation products is set as an interference noise value, so that whether the interference noise value of the n-order intermodulation products affects the uplink frequency of the base station can be determined, and the determination time is shortened.

In one embodiment, the calculating the target intensity ratio based on the overlapping region and the second frequency range includes:

As shown in fig. 5, the uplink frequency of the signal source of the L base station is different from the power intensity distribution of the n-order intermodulation products, in which the power intensity at the middle position of the second frequency range of the n-order intermodulation products is higher, and the power at the two side positions of the second frequency range of the n-order intermodulation products is lower. It will be appreciated that the target intensity ratio for the overlap region needs to be determined by dividing the different regions due to the different energies corresponding at different locations of the second frequency range of the nth order intermodulation products.

Specifically, as shown in fig. 6, the second frequency range includes a first region and a second region, the bandwidth of the second region is about 1/3 of the total bandwidth of the n-order intermodulation products, and the bandwidth of the first region is about 2/3 of the total bandwidth of the n-order intermodulation products; and the power corresponding to the first area is the same as the power corresponding to the second area, and is 1/2 of the total power of the n-order intermodulation products. And when the target intensity ratio is calculated, determining a first ratio of the overlapped area in the first area and a second ratio of the overlapped area in the second area, and calculating the target intensity ratio according to the first ratio, the first power ratio of the first area, the second ratio and the second power ratio of the second area.

Illustratively, the overlap range is 1/2 of the total bandwidth, and if the first ratio is 1/6 and the second ratio is 1/3, the target intensity ratio is 1/6*1/2*1/2+1/3*1/2=5/24; if the first ratio is 1/3 and the second ratio is 1/6, the target intensity ratio is 1/3*1/2*1/2+1/6*1/2=1/6. Obviously, in the case where the overlapping ranges are the same, the more the overlapping ranges in the second region, the larger the target intensity ratio.

In the embodiment of the invention, a first ratio of the overlapping area in a first area of the second frequency range and a second ratio of the overlapping area in the second area of the second frequency range are calculated based on the overlapping area and the second frequency range; and then the sum of the products of the first ratio and the first power duty ratio of the first area and the products of the second ratio and the second power duty ratio of the second area is set as a target intensity ratio, so that the target intensity ratio of the power is determined through the overlapping area of the frequencies, and further the subsequent calculation of the interference noise value is realized.

In one embodiment, the calculating, based on the coefficient matrix and the signal source power, the power strength of the nth order intermodulation product includes:

；

；

the K is a constant.

The intermodulation suppression degree and the rated input carrier power are basic parameters of the tested device, and are required to be introduced when the power intensity of the n-order intermodulation products is calculated. It will be appreciated that the intermodulation suppression level and the nominal input carrier power of the device under test, and hence fixed values, may be pre-tested or derived from the indicia of the device at the time of manufacture.

It should be understood that in the process of calculating the power intensity of the n-order intermodulation products, the coefficient and the signal source frequency can be quickly determined through the coefficient matrix and the initial center frequency matrix, so as to further determine the signal source power, and then the power intensity of the n-order intermodulation products is calculated according to the first formula or the second formula.

For example, the intermodulation suppression degree of the tested device is RIM, the rated input carrier power is 43dBm, and the power strength of the 3-order intermodulation product is calculated as follows:

；

and multiplying the power intensity by the target intensity ratio after calculating the power intensity of the 3-order intermodulation product to obtain the interference noise value of the 3-order intermodulation product.

Similarly, under the condition of calculating the 5-order intermodulation products, the coefficient and the signal source frequency are rapidly determined through the coefficient matrix and the initial center frequency matrix, so that the signal source power is determined, and then the power intensity of the 5-order intermodulation products is obtained through a second formula.

In the embodiment of the invention, intermodulation suppression degrees and rated input carrier power of a tested device receiving L signal sources are obtained; and then the intermodulation suppression degree, the rated input carrier power, the coefficient matrix and the signal source power are brought into a preset formula to obtain the power intensity of the n-order intermodulation products, so that the coefficient and the signal source power can be rapidly determined through the coefficient matrix, and then the power intensity is obtained by carrying out calculation by bringing into the preset formula, thereby shortening the time for determining the interference noise value.

In one embodiment, the calculating the second frequency range of the nth order intermodulation products based on the target center frequency matrix, the target bandwidth matrix comprises:

It should be appreciated that after determining the target center frequency matrix and the target bandwidth matrix for the n-order intermodulation products, a second frequency range correspondence matrix for the n-order intermodulation products may be calculated from the target center frequency matrix and the target bandwidth matrix. The target center frequency matrix can be obtained from the center frequencies of the downlink carrier signals of the L base stations, the frequency corresponding to the target center frequency matrix at this time is the bandwidth center frequency, at this time, the first weighting value and the second weighting value are both 1/2, and the second frequency range corresponding matrix R' of the n-order intermodulation products can be represented by the following matrices:

R’=[R _m×k -B _m×k /2,R _m×k +B _m×k /2]；

The minimum value in the second frequency range is the difference value between the target center frequency matrix and the first product value. The maximum value in the second frequency generation is the sum of the target center frequency matrix and the second product value. The second frequency range of the n-order intermodulation products can be rapidly determined by the matrix.

In the embodiment of the invention, a first product value of the target bandwidth matrix and the first weighting value is calculated, and the difference value between the target center frequency matrix and the first product value is set as the minimum value of the second frequency range; and calculating a second product value of the target bandwidth matrix and the second weighted value, and setting the sum of the target center frequency matrix and the second product value as the maximum value of the second frequency range, thereby obtaining the second frequency range of the n-order intermodulation product.

By way of example, the method provided by the embodiment can determine the interference noise value to perform interference tracing, and the specific process is as follows:

1. the method comprises the steps of calculating the dominant frequency band scale of the existing domestic operators, and configuring 6 frequency bands:

1) Calculating interference results of 2-order and 3-order and interference tracing, recording 32 interference records in total, and controlling the operation time within 0.32 seconds;

2) Calculating interference results and interference tracing sources of 2, 3 and 5 orders, recording 234 interference records in total, and controlling operation time within 1.84 seconds

2. Taking an example that one indoor base station accesses a very large number of carriers, the following table configures 17 frequency bands in total:

1) Calculating interference results of 2-order and 3-order and interference tracing, and recording 2019 interference records, wherein the operation time is controlled within 12.54 seconds;

2) The interference results and interference tracing of the 2 nd order, the 3 rd order and the 5 th order are calculated, 94622 interference records are recorded in total, the operation time is 20232 seconds (when the operation time is over 10 frequency bands, the complexity of the operation time is huge, and only the intermodulation interference of the 2 nd order and the 3 rd order is recommended to be calculated):

therefore, the intermodulation product interference determination method provided by the embodiment is adopted for interference tracing, so that the calculation time is reduced by several times, and the determination consumption time is effectively shortened.

Referring to fig. 7, fig. 7 is a block diagram of an intermodulation product interference determining apparatus according to an embodiment of the present invention, and as shown in fig. 7, an intermodulation product interference determining apparatus 700 includes:

an obtaining module 701, configured to obtain a signal source power of each of L base stations, a first frequency range of an uplink frequency, a downlink center frequency, and a frequency bandwidth corresponding to the downlink center frequency, and a coefficient matrix of n-order intermodulation products, where the n-order intermodulation products are intermodulation products generated by interaction of n signal sources in the L base stations, the coefficient matrix is used to represent calculation coefficients of the n-order intermodulation products corresponding to the signal sources, where L is a positive integer greater than 2, n is a positive integer 2, 3, or 5, and n is less than L, and each row in the coefficient matrix is used to represent coefficients of n signal sources corresponding to one n-order intermodulation product;

A first generating module 702, configured to generate an initial center frequency matrix based on the downlink center frequencies of the base stations, where each column of the initial center frequency matrix is used to characterize downlink center frequencies of n signal sources corresponding to one n-order intermodulation product;

a second generating module 703, configured to multiply the initial center frequency matrix and the coefficient matrix to generate a target center frequency matrix, where the target center frequency matrix is used to characterize frequencies of n-order intermodulation products generated by n signal sources in the L base stations;

a third generating module 704, configured to generate a target bandwidth matrix based on the frequency bandwidth of each base station and the coefficient matrix, where the target bandwidth matrix is used to characterize frequency bandwidths of n-order intermodulation products generated by n signal sources in the L base stations, and the target bandwidth matrix corresponds to the same signal source at a position of the same rank as the target center frequency matrix;

a first calculating module 705, configured to calculate a second frequency range of the nth order intermodulation product based on the target center frequency matrix and the target bandwidth matrix;

a second calculating module 706, configured to calculate, based on the first frequency range, the second frequency range, and the signal source power, an interference noise value of the nth order intermodulation product, where the interference noise value is used to characterize interference conditions of the nth order intermodulation product on L signal sources, where there is an overlapping region between the second frequency range and the first frequency range;

A first processing module 707, configured to determine coefficients of n signal sources of the n-order intermodulation product based on a line number of the n-order intermodulation product in the target center frequency matrix or the target bandwidth matrix and the coefficient matrix, where the interference noise value corresponding to the n-order intermodulation product is greater than a set threshold;

a second processing module 708 is configured to determine downlink center frequencies of n signal sources of the n-order intermodulation products based on a column number of the n-order intermodulation products in the target center frequency matrix or the target bandwidth matrix, and the initial center frequency matrix.

Optionally, the third generating module 704 includes:

Optionally, the second computing module 706 includes:

Optionally, the first computing submodule includes:

Optionally, the second computing submodule includes:

；

；

the K is a constant.

Optionally, the first computing module 705 includes:

The intermodulation product interference determining device provided by the embodiment of the invention can realize each process of each embodiment of the intermodulation product interference determining method, has the technical characteristics corresponding to each other one by one, can achieve the same technical effect, and is not repeated here for avoiding repetition.

It should be noted that, the intermodulation product interference determining apparatus in the embodiment of the present invention may be an apparatus, or may be a component, an integrated circuit, or a chip in an electronic device.

Referring to fig. 8, fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, where the electronic device includes a memory 801, a processor 802, and a program or an instruction stored to run on the memory 801, and when the program or the instruction is executed by the processor 802, any steps in the method embodiment corresponding to fig. 1 may be implemented and the same beneficial effects may be achieved, which will not be described herein.

The processor 802 may be a CPU, ASIC, FPGA or GPU, among others.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of implementing the methods of the embodiments described above may be implemented by hardware associated with program instructions, where the program may be stored on a readable medium.

The embodiment of the present invention further provides a readable storage medium, where a computer program is stored, where the computer program when executed by a processor can implement any step in the method embodiment corresponding to fig. 1, and achieve the same technical effects, and in order to avoid repetition, no further description is given here. Such as Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic or optical disk, etc.

The terms "first," "second," and the like in embodiments of the present invention are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in this application means at least one of the connected objects, such as a and/or B and/or C, is meant to encompass the 7 cases of a alone, B alone, C alone, and both a and B, both B and C, both a and C, and both A, B and C.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described example method may be implemented by means of software plus a necessary general hardware platform, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a second terminal device, etc.) to perform the method of the embodiments of the present application.

The embodiments of the present application have been described in connection with the accompanying drawings, but the present application is not limited to the above-described embodiments, which are intended to be illustrative only and not limiting, and many forms can be made by one of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A method of intermodulation product interference determination comprising:

2. The method of claim 1, wherein the generating a target bandwidth matrix based on the frequency bandwidth of each base station, the initial center frequency matrix, and the coefficient matrix comprises:

3. The method of claim 1, wherein the calculating the interference noise value for the nth order intermodulation products based on the first frequency range, the second frequency range, and the signal source power comprises:

4. A method according to claim 3, wherein said calculating a target intensity ratio based on said overlap region and said second frequency range comprises:

5. The method of claim 3, wherein the calculating the power strength of the nth order intermodulation products based on the coefficient matrix and the signal source power comprises:

；

calculating the power strength of the n-order intermodulation products by a second formula is represented as follows:

；

the K is a constant.

6. The method of claim 1, wherein the calculating the second frequency range of the nth order intermodulation products based on the target center frequency matrix, the target bandwidth matrix comprises:

7. An intermodulation product interference determining apparatus, comprising:

The second generation module multiplies the initial center frequency matrix and the coefficient matrix to generate a target center frequency matrix, wherein the target center frequency matrix is used for representing the frequencies of n-order intermodulation products generated by n signal sources in the L base stations;

8. The apparatus of claim 7, wherein the third generation module comprises:

and the second processing submodule multiplies the absolute value of the coefficient matrix and the initial bandwidth matrix to obtain a target bandwidth matrix of the n-order intermodulation products.

9. An electronic device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the intermodulation product interference determination method of any of claims 1 to 7.

10. A readable storage medium storing a program, characterized in that the program when executed by a processor implements the steps in the intermodulation product interference determining method of any of claims 1 to 7.