CN114089065B - Electromagnetic compatibility prediction method based on transceiving electromagnetic spectrum - Google Patents

Electromagnetic compatibility prediction method based on transceiving electromagnetic spectrum Download PDF

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Publication number
CN114089065B
CN114089065B CN202111362949.2A CN202111362949A CN114089065B CN 114089065 B CN114089065 B CN 114089065B CN 202111362949 A CN202111362949 A CN 202111362949A CN 114089065 B CN114089065 B CN 114089065B
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frequency
transmitter
bandwidth
receiver
data
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CN114089065A (en
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李尧尧
蔡少雄
刁晓静
曹成
陈广志
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Beihang University
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Beihang University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing

Abstract

The invention discloses an electromagnetic compatibility prediction method based on a transceiving electromagnetic spectrum, which comprises the following steps: s1, for a system comprising a plurality of transmitters and a plurality of receivers, obtaining a transmitter data list [ T ] operating in the current state in the system]MAnd receiver dataList [ R ]]N(ii) a S2, calculating the electromagnetic spectrum of the transmitter; s3, calculating the electromagnetic spectrum of the receiver; and S4, predicting the electromagnetic compatibility of the transmitter and the receiver according to the electromagnetic spectrum of the transmitter and the receiver. The electromagnetic compatibility prediction method based on the transceiving electromagnetic spectrum can solve the problem that the electromagnetic compatibility distributed by indexes relates to the spectrum compatibility in a node discovery system, and provides favorable conditions for the evaluation and design of the electromagnetic compatibility.

Description

Electromagnetic compatibility prediction method based on transceiving electromagnetic spectrum
Technical Field
The invention relates to the field of electromagnetic waves, in particular to an electromagnetic compatibility prediction method based on a transceiving electromagnetic spectrum.
Background
In the index allocation process of the electromagnetic compatibility design stage of a large-scale electronic platform, the transmitted spectrum of a transmitter and the received spectrum of a receiver are often required to be predicted. However, in the current situation, due to data loss, no good analysis and prediction means exists in the electromagnetic compatibility design stage; the electromagnetic compatibility design index is relatively abstract, the electromagnetic compatibility characteristic and the related technical state of equipment cannot be shown in a concrete or visual mode, and the problem of frequency spectrum compatibility in the system can not be found conveniently in the electromagnetic compatibility design stage of index distribution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an electromagnetic compatibility prediction method based on a transmitting-receiving electromagnetic spectrum, which can find the problem of spectrum compatibility in a system at an index distribution stage.
The purpose of the invention is realized by the following technical scheme: an electromagnetic compatibility prediction method based on a transmitting-receiving electromagnetic spectrum comprises the following steps:
s1, for a system comprising a plurality of transmitters and a plurality of receivers, obtaining a transmitter data list [ T ] working in the current state in the system]MAnd receiver data list R]N；
S2, calculating the electromagnetic spectrum of the transmitter;
s3, calculating the electromagnetic spectrum of the receiver;
and S4, predicting the electromagnetic compatibility of the transmitter and the receiver according to the electromagnetic spectrum of the transmitter and the receiver.
The step S2 includes:
s201: for the ith transmitter, from the transmitter data list T]MTo obtain the working center frequency thereof
Figure BDA0003359979940000011
Amplitude of transmitted signal
Figure BDA0003359979940000012
A 3dB bandwidth of
Figure BDA0003359979940000013
A 20dB bandwidth of
Figure BDA0003359979940000014
A 40dB bandwidth of
Figure BDA0003359979940000015
A 60dB bandwidth of
Figure BDA0003359979940000016
S202, when each value of i is 1,2, …, M, respectively calculating the frequency range of 60dB bandwidth of the ith transmitter as
Figure BDA0003359979940000017
Wherein M is the number of transmitters;
and when i is 1,2, …, M
Figure BDA0003359979940000018
Is recorded as
Figure BDA0003359979940000019
When i is equal to 1,2, …, M
Figure BDA00033599799400000110
Maximum ofThe value is recorded as
Figure BDA00033599799400000111
Will be provided with
Figure BDA00033599799400000112
Frequency list F for adding to emission spectrumTPerforming the following steps;
s203: according to the data of the ith transmitter
Figure BDA00033599799400000113
Respectively to be provided with
Figure BDA00033599799400000114
Figure BDA00033599799400000115
Figure BDA00033599799400000116
Figure BDA00033599799400000125
Figure BDA00033599799400000117
Figure BDA00033599799400000118
Figure BDA00033599799400000119
Figure BDA00033599799400000120
Figure BDA00033599799400000121
Figure BDA00033599799400000122
Figure BDA00033599799400000123
And
Figure BDA00033599799400000124
frequency list F for adding to the emission spectrumTPerforming the following steps;
s204: when i is 1,2, …, M, step S203 is repeatedly executed; after the execution is finished, a frequency list F of the emission spectrum is finally obtainedTThe data in (1) are sorted from low to high to form F'T；
S205: go through F'TTo obtain the kth frequency value
Figure BDA0003359979940000021
S206: traversing all transmitters in the system, calculating based on the data from the transmitters
Figure BDA0003359979940000022
Corresponding amplitude
Figure BDA0003359979940000023
S207: when K is 1,2, … and K1, steps S205 to S206 are executed in a loop until all values of K are traversed, and the values of each frequency value are collected
Figure BDA0003359979940000024
Forming the electromagnetic spectrum V of the transmitterTWherein K1 is F'TThe number of frequency values in (1).
The step S3 includes:
s301: for the jth receiver, from the receiver data list R]NTo obtain the working center frequency thereof
Figure BDA0003359979940000025
Sensitivity of reception
Figure BDA0003359979940000026
A 3dB selective bandwidth of
Figure BDA0003359979940000027
20dB selective bandwidthIs composed of
Figure BDA0003359979940000028
A 40dB selective bandwidth of
Figure BDA0003359979940000029
60dB selective bandwidth of
Figure BDA00033599799400000210
S302, when j is equal to each value of 1,2, …, N, respectively calculating the frequency range of 60dB bandwidth of the j receiver as
Figure BDA00033599799400000211
Wherein N is the number of receivers;
when j is 1,2, …, N
Figure BDA00033599799400000212
Is recorded as
Figure BDA00033599799400000213
When j is 1,2, …, N
Figure BDA00033599799400000214
Is recorded as
Figure BDA00033599799400000215
S303. will
Figure BDA00033599799400000216
Frequency list F for adding to the received spectrumRThe preparation method comprises the following steps of (1) performing;
s304. according to the jth transmitter data
Figure BDA00033599799400000217
Respectively to be provided with
Figure BDA00033599799400000218
Figure BDA00033599799400000219
Figure BDA00033599799400000220
And
Figure BDA00033599799400000221
frequency list F added to the received spectrumRPerforming the following steps;
s305, when j is 1,2, …, N, repeatedly executing step S304; frequency list F of received spectrum obtained after executionRThe data in (1) are sorted from low to high to form F'R；
S306, traversing F'RTo obtain the kth frequency value
Figure BDA00033599799400000222
S307, traversing all receivers in the system, and calculating according to data of the receivers
Figure BDA00033599799400000223
Corresponding amplitude
Figure BDA00033599799400000224
S308, when K is equal to 1,2, … and K2, the steps S306 to S307 are executed in a circulating way until all values of K are traversed, and the values on each frequency are collected
Figure BDA00033599799400000225
Forming the electromagnetic spectrum V of the receiverRWherein K2 represents F'RThe number of frequency values in (1).
The step S4 includes:
whether a shared frequency band exists in the electromagnetic spectrum of the transmitter and the electromagnetic spectrum of the receiver in a specified bandwidth (for example, a specified 20dB bandwidth) is judged, if the shared frequency band exists, the situation that the working frequency bands of the transmitter and the receiver conflict with each other in the specified bandwidth exists, namely, the problem of electromagnetic compatibility exists, and if the shared frequency band does not exist, the problem of electromagnetic compatibility does not exist in the specified bandwidth of the transmitter and the receiver.
Preferably, when there is an electromagnetic compatibility problem, the transmitter may cause electromagnetic interference to the receiver, and therefore, it is necessary to reduce the coupling between the devices by means of shielding, receiving, filtering, and the like at a later stage, so that the devices can operate compatibly. Or directly reconsider the new transmit or receive band in the design stage to make the two operate compatibly.
The invention has the beneficial effects that: the invention can find the problem of frequency spectrum compatibility in the system at the electromagnetic compatibility design stage of index distribution, and provides favorable conditions for the evaluation of electromagnetic compatibility.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a schematic diagram of a transmitter transmission spectrum;
FIG. 3 is a schematic diagram of a frequency selective spectrum in a receiver;
FIG. 4 is a schematic illustration of an emission spectrum within the system;
FIG. 5 is a schematic diagram of an in-system receive spectrum;
fig. 6 is a schematic diagram of the system adduction/adduction mixing spectrum.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, a method for predicting electromagnetic compatibility based on a transmit-receive electromagnetic spectrum is characterized in that: the method comprises the following steps:
s1, for a system comprising a plurality of transmitters and a plurality of receivers, obtaining a transmitter data list [ T ] working in the current state in the system]MAnd receiver data list R]N；
S2, calculating the electromagnetic spectrum of the transmitter;
s3, calculating the electromagnetic spectrum of the receiver;
and S4, predicting the electromagnetic compatibility of the transmitter and the receiver according to the electromagnetic spectrum of the transmitter and the receiver.
In the examples of the present applicationSaid transmitter data list [ T ]]MIncluding data from each transmitter; the data for each transmitter includes:
the working center frequency is in MHz;
the amplitude of the transmitted signal is dBm;
3dB bandwidth in MHz;
20dB bandwidth in MHz;
40dB bandwidth in MHz;
60dB bandwidth in MHz.
The schematic diagram of the transmission spectrum of the transmitter is shown in FIG. 2;
in an embodiment of the application, the receiver data list R]NThe data of each receiver is contained, and the data of each receiver comprises:
the working center frequency is in MHz;
receive sensitivity in dBm;
3dB selective bandwidth in MHz;
20dB selective bandwidth in MHz;
40dB selective bandwidth in MHz;
60dB selectivity bandwidth in MHz.
A schematic diagram of the selective spectrum of the intermediate frequency in the receiver is shown in fig. 3.
The step S2 includes:
s201: for the ith transmitter, from the transmitter data list T]MTo obtain the working center frequency thereof
Figure BDA0003359979940000041
Amplitude of transmitted signal
Figure BDA0003359979940000042
A 3dB bandwidth of
Figure BDA0003359979940000043
A 20dB bandwidth of
Figure BDA0003359979940000044
A 40dB bandwidth of
Figure BDA0003359979940000045
A 60dB bandwidth of
Figure BDA0003359979940000046
S202, when each value of i is 1,2, …, M, respectively calculating the frequency range of 60dB bandwidth of the ith transmitter as
Figure BDA0003359979940000047
Wherein M is the number of transmitters;
and when i is 1,2, …, M
Figure BDA0003359979940000048
Is recorded as
Figure BDA0003359979940000049
When i is 1,2, …, M
Figure BDA00033599799400000410
Is recorded as
Figure BDA00033599799400000411
Will be provided with
Figure BDA00033599799400000412
Frequency list F for adding to emission spectrumTPerforming the following steps;
s203: according to the data of the ith transmitter
Figure BDA00033599799400000413
Respectively to be provided with
Figure BDA00033599799400000414
Figure BDA00033599799400000415
Figure BDA00033599799400000416
And
Figure BDA00033599799400000417
frequency list F for adding to the emission spectrumTPerforming the following steps;
s204: when i is 1,2, …, M, repeatedly executing step S203; after the execution is finished, a frequency list F of the emission spectrum is finally obtainedTThe data in (1) are sorted from low to high to form F'T；
S205: go through F'TTo obtain the kth frequency value
Figure BDA00033599799400000418
S206: traversing all transmitters in the system, calculating based on the transmitter data
Figure BDA00033599799400000419
Corresponding amplitude
Figure BDA00033599799400000420
S207: when K is 1,2, … and K1, steps S205 to S206 are executed in a loop until all values of K are traversed, and the values of each frequency value are collected
Figure BDA0003359979940000051
Forming the electromagnetic spectrum V of the transmitterTWherein K1 is F'TThe number of frequency values in (1).
Wherein the step S204 includes:
a1: initialization will be
Figure BDA0003359979940000052
Assigning a preset lowest emission amplitude; i is initialized to 1;
a2: obtaining ith transmitter data
Figure BDA0003359979940000053
And
Figure BDA0003359979940000054
go to step A3;
a3: if it is not
Figure BDA0003359979940000055
Or
Figure BDA0003359979940000056
Then will be
Figure BDA0003359979940000057
Is endowed with
Figure BDA0003359979940000058
Go to step A9; otherwise, turning to A4;
a4: if it is not
Figure BDA0003359979940000059
Or
Figure BDA00033599799400000510
Then will be
Figure BDA00033599799400000511
Is endowed with
Figure BDA00033599799400000512
Go to step A9; otherwise, turning to A5;
a5: if it is not
Figure BDA00033599799400000513
Or
Figure BDA00033599799400000514
Then will be
Figure BDA00033599799400000515
Is endowed with
Figure BDA00033599799400000516
Turning to step A9; otherwise, turning to A6;
a6: if it is not
Figure BDA00033599799400000517
Or
Figure BDA00033599799400000518
Then will be
Figure BDA00033599799400000519
Is endowed with
Figure BDA00033599799400000520
Go to step A9; otherwise, turning to A7;
a7: if it is not
Figure BDA00033599799400000521
Then will be
Figure BDA00033599799400000522
Is endowed with
Figure BDA00033599799400000523
Turning to step A9; otherwise, turning to A8;
a8: judgment of
Figure BDA00033599799400000524
Whether or not to fall into
Figure BDA00033599799400000525
Figure BDA00033599799400000526
Among eight frequency intervals consisting of nine frequencies, if so, the frequency interval satisfying the conditions is [ freq1, freq2 ]]The amplitudes corresponding to the nine frequencies are respectively
Figure BDA00033599799400000527
Recording the amplitude corresponding to the frequency freq1 as val1 and the amplitude corresponding to the frequency freq2 as val2, there are
Figure BDA00033599799400000528
Corresponding amplitude is
Figure BDA00033599799400000529
Figure BDA00033599799400000530
Turning to step A9; if not, directly switching to the step A9;
for example, if the frequency interval satisfying the condition is the 4 th interval, there are
Figure BDA00033599799400000531
Figure BDA00033599799400000532
Figure BDA00033599799400000533
Figure BDA00033599799400000534
A9: judging whether i +1 is larger than M;
if yes, the transmitter finishes traversing and returns to the current state
Figure BDA00033599799400000535
Namely, it is
Figure BDA00033599799400000536
A corresponding magnitude;
if not, assigning i +1 to i, and circularly executing the step A2 to the step A9.
The step S3 includes:
s301: for the jth receiver, from the receiver data list R]NTo obtain the working center frequency thereof
Figure BDA0003359979940000061
Sensitivity of reception
Figure BDA0003359979940000062
A 3dB selective bandwidth of
Figure BDA0003359979940000063
A 20dB selective bandwidth of
Figure BDA0003359979940000064
A 40dB selective bandwidth of
Figure BDA0003359979940000065
60dB selective bandwidth of
Figure BDA0003359979940000066
S302, when j is equal to each of 1,2, …, N, the frequency range of 60dB bandwidth of j-th receiver is calculated as
Figure BDA0003359979940000067
Wherein N is the number of receivers;
when j is 1,2, …, N
Figure BDA0003359979940000068
Is recorded as
Figure BDA0003359979940000069
When j is 1,2, …, N
Figure BDA00033599799400000610
Is recorded as
Figure BDA00033599799400000611
S303. will
Figure BDA00033599799400000612
Frequency list F for adding to the received spectrumRThe preparation method comprises the following steps of (1) performing;
s304, according to the j transmitter data
Figure BDA00033599799400000613
Respectively to be provided with
Figure BDA00033599799400000614
Figure BDA00033599799400000615
Figure BDA00033599799400000616
And
Figure BDA00033599799400000617
frequency list F added to the received spectrumRPerforming the following steps;
s305, when j is 1,2, …, N, repeatedly executing step S304; frequency list F of received spectrum obtained after executionRThe data in (1) are sorted from low to high to form F'R；
S306, traversing F'RTo obtain the kth frequency value
Figure BDA00033599799400000618
S307, traversing all receivers in the system, and calculating according to data of the receivers
Figure BDA00033599799400000619
Corresponding amplitude
Figure BDA00033599799400000620
S308, when K is 1,2, … and K2, executing steps S306 to S307 in a circulating way until all values of K are traversed, and collecting values on each frequency
Figure BDA00033599799400000621
Forming the electromagnetic spectrum V of a receiverRWherein K2 represents F'RThe number of frequency values in (1).
Wherein the step S304 includes:
b1: initialization will be
Figure BDA00033599799400000622
Assigning a preset maximum receiving amplitude; j is initialized to 1;
b2: get the firstj receiver data
Figure BDA00033599799400000623
And
Figure BDA00033599799400000624
b3: if it is not
Figure BDA00033599799400000625
Or
Figure BDA00033599799400000626
Then will be
Figure BDA00033599799400000627
Is endowed with
Figure BDA00033599799400000628
Go to step B9; if not, directly switching to the step B4;
b4: if it is not
Figure BDA00033599799400000629
Or
Figure BDA00033599799400000630
Then will be
Figure BDA00033599799400000631
Is endowed with
Figure BDA00033599799400000632
Go to step B9; if not, directly switching to the step B5;
b5: if it is not
Figure BDA00033599799400000633
Or
Figure BDA00033599799400000634
Then will be
Figure BDA00033599799400000635
Is endowed with
Figure BDA00033599799400000636
Go to step B9; if not, directly switching to the step B6;
b6: if it is used
Figure BDA0003359979940000071
Or
Figure BDA0003359979940000072
Then will be
Figure BDA0003359979940000073
Is endowed with
Figure BDA0003359979940000074
Go to step B9; if not, directly switching to the step B7;
b7: if it is not
Figure BDA0003359979940000075
Then will be
Figure BDA0003359979940000076
Is endowed with
Figure BDA0003359979940000077
Go to step B9; if not, directly switching to the step B8;
b8: judgment of
Figure BDA0003359979940000078
Whether or not to fall into
Figure BDA0003359979940000079
Figure BDA00033599799400000710
If the eight frequency intervals consisting of nine frequencies are equal, the frequency interval meeting the conditions is [ freq1, freq2 ]]The amplitudes corresponding to the nine frequencies are respectively
Figure BDA00033599799400000711
Recording the amplitude corresponding to the frequency freq1 as val1 and the amplitude corresponding to the frequency freq2 as val2, there are
Figure BDA00033599799400000712
Corresponding amplitude is
Figure BDA00033599799400000713
Go to step B9; if not, directly switching to the step B9;
for example, if the frequency interval satisfying the condition is the 4 th interval, there are
Figure BDA00033599799400000714
Figure BDA00033599799400000715
Figure BDA00033599799400000716
Figure BDA00033599799400000717
B9: judging whether j +1 is larger than N;
if yes, the transmitter finishes traversing and returns to the current state
Figure BDA00033599799400000718
Namely that
Figure BDA00033599799400000719
A corresponding magnitude;
if not, j +1 is assigned to j, and the steps A2 to A9 are executed in a circulating mode.
The step S4 includes:
judging whether the electromagnetic spectrum of the transmitter and the electromagnetic spectrum of the receiver have a shared frequency band in the designated bandwidth, if so, the transmitter and the receiver have the condition that the working frequency bands conflict with each other in the designated bandwidth, namely, the problem of electromagnetic compatibility exists, and if not, the transmitter and the receiver do not have the problem of electromagnetic compatibility in the designated bandwidth. When the electromagnetic compatibility problem exists, the transmitter may cause electromagnetic interference to the receiver, so that the coupling between the devices needs to be reduced by means of shielding, receiving, filtering and the like at a later stage, so that the devices can work compatibly. Or directly reconsider the new transmit or receive band in the design stage to make the two operate compatibly.
In the embodiment of the present application, by using the application method, a schematic diagram of a plurality of transmitters, a plurality of receivers, and a transmission spectrum, a reception spectrum, and a reception/transmission mixed spectrum in a system is obtained, where the schematic diagram of the transmission spectrum in the system is shown in fig. 4, the schematic diagram of the reception spectrum in the system is shown in fig. 5, and the schematic diagram of the reception/transmission mixed spectrum in the system is shown in fig. 6; in the system interior receiving/transmitting mixed spectrum, the co-location interference frequency band of the shared frequency band existing in the transmitter and the receiver and the corresponding transmitting and receiving equipment can be visually and obviously seen.
By comparing the transmit spectrum of the transmitter and the receive spectrum of the receiver within the system to find the co-occupied frequency ranges, the scheme and design phase requires careful treatment of the transmitter and receiver operating in these frequency ranges, as these transmitters and receivers, if not well processed, are very susceptible to electromagnetic interference between them. After the jointly occupied frequency range is visually expressed in a graph form during design, the coupling channel of the transmitter and receiver pair shared by the frequency ranges needs to be designed in an important way, for example, the electromagnetic interference between the transmitter and receiver pair is reduced by adding the isolation between the transmitter and receiver pair, receiving, shielding and other means.
While the foregoing description shows and describes a preferred embodiment of the invention, it is to be understood, as noted above, that the invention is not limited to the form disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and may be modified within the scope of the inventive concept described herein by the above teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. A method for predicting electromagnetic compatibility based on a transmitting-receiving electromagnetic spectrum is characterized in that: the method comprises the following steps:
s1, for a system comprising a plurality of transmitters and a plurality of receivers, obtaining a transmitter data list [ T ] working in the current state in the system]MAnd receiver data list R]N；
S2, calculating the electromagnetic spectrum of the transmitter;
the step S2 includes:
s201: for the ith transmitter, from the transmitter data list T]MTo obtain the working center frequency thereof
Figure FDA0003565087670000011
Amplitude of transmitted signal
Figure FDA0003565087670000012
A 3dB bandwidth of
Figure FDA0003565087670000013
A 20dB bandwidth of
Figure FDA0003565087670000014
40dB bandwidth of
Figure FDA0003565087670000015
A 60dB bandwidth of
Figure FDA0003565087670000016
S202, when each of i ═ 1, 2.., M takes a value, respectively calculating the frequency range of 60dB bandwidth of the ith transmitter as
Figure FDA0003565087670000017
Wherein M is the number of transmitters;
and when i is 1,2, say, M
Figure FDA0003565087670000018
Is recorded as
Figure FDA0003565087670000019
When i is 1,2, said, M
Figure FDA00035650876700000110
Is recorded as
Figure FDA00035650876700000111
Will be provided with
Figure FDA00035650876700000112
Frequency list F for adding to emission spectrumTPerforming the following steps;
s203: data according to ith transmitter
Figure FDA00035650876700000113
Respectively to be provided with
Figure FDA00035650876700000114
Figure FDA00035650876700000115
Figure FDA00035650876700000116
And
Figure FDA00035650876700000117
frequency list F for adding to the emission spectrumTPerforming the following steps;
s204: repeatedly executing step S203 when i is 1, 2.. times, M; after the execution is finished, a frequency list F of the emission spectrum is finally obtainedTThe data in (1) are sorted from low to high to form F'T；
The step S204 includes:
a1: initialization will be
Figure FDA00035650876700000118
Assigning a preset lowest emission amplitude; i is initialized to 1;
a2: obtaining ith transmitter data
Figure FDA00035650876700000119
And
Figure FDA00035650876700000120
go to step A3;
a3: if it is not
Figure FDA00035650876700000121
Or
Figure FDA00035650876700000122
Then will be
Figure FDA00035650876700000123
Is endowed with
Figure FDA00035650876700000124
Go to step A9; otherwise, turning to A4;
a4: if it is not
Figure FDA00035650876700000125
Or
Figure FDA00035650876700000126
Then will be
Figure FDA00035650876700000127
Is endowed with
Figure FDA00035650876700000128
Go to step A9; otherwise, turning to A5;
a5: if it is not
Figure FDA00035650876700000129
Or
Figure FDA00035650876700000130
Then will be
Figure FDA00035650876700000131
Is endowed with
Figure FDA00035650876700000132
Go to step A9; otherwise, turning to A6;
a6: if it is not
Figure FDA0003565087670000021
Or
Figure FDA0003565087670000022
Then will be
Figure FDA0003565087670000023
Is endowed with
Figure FDA0003565087670000024
Go to step A9; otherwise, turning to A7;
a7: if it is not
Figure FDA0003565087670000025
Then will be
Figure FDA0003565087670000026
Is endowed with
Figure FDA0003565087670000027
Turning to step A9; otherwise, turning to A8;
a8: judgment of
Figure FDA0003565087670000028
Whether or not to fall into
Figure FDA0003565087670000029
Figure FDA00035650876700000210
Among eight frequency intervals consisting of nine frequencies, if so, the frequency interval satisfying the conditions is [ freq1, freq2 ]]The amplitudes corresponding to the nine frequencies are respectively
Figure FDA00035650876700000211
Recording the amplitude corresponding to the frequency freq1 as val1 and the amplitude corresponding to the frequency freq2 as val2, there are
Figure FDA00035650876700000212
Corresponding amplitude is
Figure FDA00035650876700000213
Figure FDA00035650876700000214
Go to step A9; if not, directly switching to the step A9;
a9: judging whether i +1 is larger than M;
if yes, the transmitter finishes traversing and returns to the current state
Figure FDA00035650876700000215
Namely, it is
Figure FDA00035650876700000216
A corresponding magnitude;
if not, assigning i +1 to i, and circularly executing the step A2-A9;
s205: go through F'TTo obtain the kth frequency value
Figure FDA00035650876700000217
S206: traversing all transmitters in the system, calculating based on the transmitter data
Figure FDA00035650876700000218
Corresponding amplitude
Figure FDA00035650876700000219
S207: when K is 1, 2.., K1, steps S205 to S206 are executed in a loop until all values of K are traversed, and the values of each frequency value are collected
Figure FDA00035650876700000220
Forming the electromagnetic spectrum V of the transmitterTWherein K1 is F'TThe number of frequency values in (1);
s3, calculating the electromagnetic spectrum of the receiver;
the step S3 includes:
s301: for the jth receiver, from the receiver data list R]NTo obtain the working center frequency thereof
Figure FDA00035650876700000221
Sensitivity of reception
Figure FDA00035650876700000222
A 3dB selective bandwidth of
Figure FDA00035650876700000223
A 20dB selective bandwidth of
Figure FDA00035650876700000224
A 40dB selective bandwidth of
Figure FDA00035650876700000225
60dB selective bandwidth of
Figure FDA00035650876700000226
S302, when j is 1,2, and N, respectively calculating the frequency range of 60dB bandwidth of the jth receiver as
Figure FDA00035650876700000227
Wherein N is the number of receivers;
when j is 1,2,.. times.n
Figure FDA00035650876700000228
Is recorded as
Figure FDA00035650876700000229
When j is 1,2,.. times.n
Figure FDA00035650876700000230
Is recorded as the maximum value of
Figure FDA00035650876700000231
S303. will
Figure FDA00035650876700000232
Frequency list F for adding to the received spectrumRPerforming the following steps;
s304, according to the j transmitter data
Figure FDA0003565087670000031
Respectively to be provided with
Figure FDA0003565087670000032
Figure FDA0003565087670000033
Figure FDA0003565087670000034
And
Figure FDA0003565087670000035
frequency list F added to the received spectrumRPerforming the following steps;
s305, when j is 1, 2.. times, N, repeatedly executing step S304; after the execution is finished, the mostFrequency list F of the resulting received spectrumRThe data in (1) are sorted from low to high to form F'R；
S306, traversing F'RTo obtain the kth frequency value
Figure FDA0003565087670000036
S307, traversing all receivers in the system, and calculating according to data of the receivers
Figure FDA0003565087670000037
Corresponding amplitude
Figure FDA0003565087670000038
S308, when K is 1, 2.., K2, executing steps S306 to S307 in a loop, and collecting values on each frequency until all values of K are traversed
Figure FDA0003565087670000039
Forming the electromagnetic spectrum V of a receiverRWherein K2 represents F'RThe number of frequency values in (1);
the step S304 includes:
b1: initialization will be
Figure FDA00035650876700000310
Assigning a preset maximum receiving amplitude; j is initialized to 1;
b2: obtaining jth receiver data
Figure FDA00035650876700000311
And
Figure FDA00035650876700000312
b3: if it is used
Figure FDA00035650876700000313
Or
Figure FDA00035650876700000314
Then will be
Figure FDA00035650876700000315
Is endowed with
Figure FDA00035650876700000316
Go to step B9; if not, directly switching to the step B4;
b4: if it is not
Figure FDA00035650876700000317
Or
Figure FDA00035650876700000318
Then will be
Figure FDA00035650876700000319
Is endowed with
Figure FDA00035650876700000320
Go to step B9; if not, directly switching to the step B5;
b5: if it is not
Figure FDA00035650876700000321
Or
Figure FDA00035650876700000322
Then will be
Figure FDA00035650876700000323
Is endowed with
Figure FDA00035650876700000324
Go to step B9; if not, directly switching to the step B6;
b6: if it is not
Figure FDA00035650876700000325
Or
Figure FDA00035650876700000326
Then will be
Figure FDA00035650876700000327
Is endowed with
Figure FDA00035650876700000328
Go to step B9; if not, directly switching to the step B7;
b7: if it is not
Figure FDA00035650876700000329
Then will be
Figure FDA00035650876700000330
Is endowed with
Figure FDA00035650876700000331
Go to step B9; if not, directly switching to the step B8;
b8: judgment of
Figure FDA00035650876700000332
Whether or not to fall into
Figure FDA00035650876700000333
Figure FDA00035650876700000334
If the eight frequency intervals consisting of nine frequencies are equal, the frequency interval meeting the conditions is [ freq1, freq2 ]]The amplitudes corresponding to the nine frequencies are respectively
Figure FDA00035650876700000335
Recording the amplitude corresponding to the frequency freq1 as val1 and the amplitude corresponding to the frequency freq2 as val2, there are
Figure FDA00035650876700000336
Corresponding amplitude is
Figure FDA0003565087670000041
Go to step B9; if not, directly switching to the step B9;
b9: judging whether j +1 is larger than N;
if yes, the transmitter finishes traversing and returns to the current state
Figure FDA0003565087670000042
Namely, it is
Figure FDA0003565087670000043
A corresponding magnitude;
if not, j +1 is assigned to j, and the steps B2 and B9 are executed in a circulating manner;
and S4, predicting the electromagnetic compatibility of the transmitter and the receiver according to the electromagnetic spectrum of the transmitter and the receiver.
2. The method according to claim 1, wherein the method for predicting electromagnetic compatibility based on the transceiving electromagnetic spectrum comprises: said transmitter data list [ T ]]MIncluding data from each transmitter; the data for each transmitter includes:
the working center frequency is in MHz;
the amplitude of the transmitted signal is dBm;
3dB bandwidth in MHz;
20dB bandwidth in MHz;
40dB bandwidth in MHz;
60dB bandwidth in MHz.
3. The method according to claim 1, wherein the method for predicting electromagnetic compatibility based on the transceiving electromagnetic spectrum comprises: said receiver data list [ R ]]NThe data of each receiver is contained, and the data of each receiver comprises:
the working center frequency is in MHz;
receive sensitivity in dBm;
3dB selective bandwidth in MHz;
20dB selective bandwidth in MHz;
40dB selective bandwidth in MHz;
60dB selectivity bandwidth in MHz.
4. The method according to claim 1, wherein the method for predicting electromagnetic compatibility based on the transceiving electromagnetic spectrum comprises: the step S4 includes:
judging whether the electromagnetic spectrum of the transmitter and the electromagnetic spectrum of the receiver have a shared frequency band in a specified bandwidth, if so, determining that the transmitter and the receiver have the condition that the working spectrums conflict with each other in the specified bandwidth, namely, the problem of electromagnetic compatibility exists, and if not, determining that the transmitter and the receiver have the problem of electromagnetic compatibility in the specified bandwidth.
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