CN102761382A - Method, system and correlated device for determining isolation between antennae - Google Patents
Method, system and correlated device for determining isolation between antennae Download PDFInfo
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- CN102761382A CN102761382A CN2012101862726A CN201210186272A CN102761382A CN 102761382 A CN102761382 A CN 102761382A CN 2012101862726 A CN2012101862726 A CN 2012101862726A CN 201210186272 A CN201210186272 A CN 201210186272A CN 102761382 A CN102761382 A CN 102761382A
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Abstract
The invention discloses a method for determining isolation between antennae, which is used for carrying out automatic testing on the isolation between antennae and comprises the steps of: sending a testing command and a testing channel number to a digital medium-frequency module, so that the digital medium-frequency module opens the testing channel and generates a corresponding testing signal according to the testing channel number after receiving the testing command; sending a power amplifier opening command to a power amplifier module, so that the power amplifier module is opened after receiving the power amplifier opening command; amplifying the testing signal through the power amplifier module and transmitting by a transmitting antenna to obtain the output power of the testing signal detected by the power amplifier module; receiving the testing signal by a receiving antenna, and sending a channel power query command to the digital medium-frequency module to obtain the input power of the testing signal detected by the digital medium-frequency module; and calculating the difference between the output power of the testing signal and the input power of the testing signal to obtain the isolation between antennae. The invention also discloses a device and a system both for determining the isolation between antennae, the digital medium-frequency module and the power amplifier module.
Description
Technical field
The present invention relates to wireless communication field, be meant a kind of method, system and relevant apparatus of definite isolation between antennas especially.
Background technology
In wireless communication engineering was built, the addressing of dual-mode antenna was the problem of overriding concern with installing, and to different systems, the isolation of dual-mode antenna was had different requirement.Isolation between antennas is meant signal through transmission antennas transmit, and after being received by reception antenna, this signal is in the attenuation of free space, so isolation between antennas can be represented with the power that transmits and the difference of the power that receives signal.When the base station transceiver isolation between antennas is not enough; Downstream signal can produce barrage jamming to up link; Causing the up small-signal can't demodulation, referring to shown in Figure 1, be base station transceiver antenna scheme of installation; When a plurality of systems plurality of antennas was arranged on the iron tower, the isolation of grasping between the transmitting antenna reception antenna helped the installation site that the engineering staff selects antenna; Relay amplifier (like equipment such as repeater, intermediate stations) when isolation between transmitting and receiving antenna is not enough, can cause the facility loopback self-excitation, causes serious electromagnetic interference, even damage equipment, referring to shown in Figure 2, is repeater dual-mode antenna scheme of installation.Therefore, the engineering staff need be provided with the parameter of equipment according to the environment at scene, guarantees radio system uplink downlink balance, and the isolation of grasping between the transmitting antenna reception antenna helps the installation site that the engineering staff selects antenna.
In the prior art; On wireless communication engineering; Obtain the isolation of reception antenna and transmitting antenna, need pertinent instruments such as ready signal generator, spectrum analyzer, attenuator, through spectrum analyzer being set at antenna transmitting terminal signalization generator, at the antenna receiving terminal; Just can measure the isolation between the antenna, utilize instruments such as attenuator that equipment is adjusted accordingly again.Yet these instruments are not only valuable and heavy, and damage especially easily, thereby can bring great inconvenience to project installation.In addition, do not having under the situation of measuring instrument, needing the engineering staff rule of thumb to estimate isolation roughly; The isolation error that draws like this is bigger; In case and environment changes, the possibility that destabilizing factor occurs is big more, can change the isolation of dual-mode antenna; Might cause the equipment can't operate as normal, even burn because of self-excitation.
Summary of the invention
In view of this, main purpose of the present invention provides a kind of method, system and relevant apparatus of definite isolation between antennas, solves through relevant expensive instrument just can carry out the problem that isolation between antennas is tested makes troubles to project installation.
For addressing the above problem, technical scheme provided by the invention is following:
A kind of method of definite isolation between antennas, said method comprises:
Send test command and test channel number to the digital intermediate frequency module, so that said digital intermediate frequency module is opened test channel after receiving said test command and number produce the test signal of correspondence according to said test channel;
Send power amplifier to power amplifier module and open order, so that said power amplifier module is opened receiving after said power amplifier is opened order;
Through said power amplifier module amplification and after transmission antennas transmit, obtain the detected test signal power output of said power amplifier module in said test signal from said power amplifier module;
When said test signal after reception antenna receives, to said digital intermediate frequency module transmitting channel power querying command, obtain the detected test signal input power of said digital intermediate frequency module from said digital intermediate frequency module;
Calculate the difference of said test signal power output and said test signal input power, obtain the isolation between antennas value.
Accordingly, said method also comprises:
After the test signal of said digital intermediate frequency module, send space channel power querying command to the digital intermediate frequency module, so that the digital intermediate frequency module detects spacing wave power according to test channel number generation correspondence; Obtain the detected said spacing wave power of said digital intermediate frequency module from said digital intermediate frequency module; Whether judge said spacing wave power less than first threshold, if then continue to carry out subsequent step; If not; Then reselect test channel number, send test command and test channel number, so that said digital intermediate frequency module is opened test channel and number produce the test signal of correspondence according to said test channel to said digital intermediate frequency module.
Accordingly, said method also comprises:
After obtaining the detected test signal power output of said power amplifier module; Whether the difference of judging nominal power output and said test signal power output is second threshold value; If then continue to carry out subsequent step, if not; Then adjust power amplifier module, and regain the detected test signal power output of said power amplifier module.
Accordingly, said method also comprises:
After obtaining the detected test signal power output of said power amplifier module, send several times channel power querying command, obtain several said test signal input powers to said digital intermediate frequency module; Calculate the difference of said test signal power output and each test signal input power respectively, obtain several isolation between antennas values; Said several isolation between antennas values are handled, obtained first test result of test this time.
Accordingly, said method also comprises:
After first test result that obtains said test this time, judge whether to proceed test, if not, EOT then; If; Close the power amplifier order to the power amplifier module transmission; Reselect test channel number; Send test command and test channel number to said digital intermediate frequency module, make said digital intermediate frequency module open test channel, and make said digital intermediate frequency module number produce the test signal of correspondence according to test channel; A plurality of first test results of repeatedly being tested are chosen a test result in said a plurality of first test result as second test result.
Accordingly, said method also comprises:
According to said second test result, upgrade the link attenuation value automatically.
A kind of device of definite isolation between antennas, said device comprises:
First transmitting element is used for sending test command and test channel number to the digital intermediate frequency module, so that said digital intermediate frequency module is opened test channel after receiving said test command and number produce the test signal of correspondence according to said test channel;
Second transmitting element is used for sending power amplifier to power amplifier module and opens order, so that said power amplifier module is opened receiving after said power amplifier is opened order;
First acquiring unit is used for obtaining the detected test signal power output of said power amplifier module in the said power amplifier module amplification of said test signal process and after transmission antennas transmit from said power amplifier module;
The 3rd transmitting element, be used for when said test signal after reception antenna receives, to said digital intermediate frequency module transmitting channel power querying command;
Second acquisition unit is used for obtaining the detected test signal input power of said digital intermediate frequency module from said digital intermediate frequency module;
Computing unit is used to calculate the difference of said test signal power output and said test signal input power, obtains the isolation between antennas value.
Accordingly, said device also comprises:
First judging unit is used to judge that whether spacing wave power is less than first threshold;
First selected cell is used for when said spacing wave power is not less than said first threshold, reselects test channel number;
Second judging unit is used to judge whether the nominal power output of said test signal and the difference of said test signal power output are second threshold value;
Adjustment unit is used for when the difference of the nominal power output of said test signal and said test signal power output is not second threshold value, adjusting said power amplifier module;
First processing unit is used for several isolation between antennas values are handled, and draws first test result of test this time;
The 3rd judging unit is used for after first test result that obtains said test this time, judging whether to proceed test;
The 4th transmitting element is used for when proceeding to test, and sends to said power amplifier module and closes the power amplifier order;
Second selected cell is used for when proceeding to test, to said power amplifier module send close the power amplifier order after, reselect test channel number;
Second processing unit, a test result that is used for choosing said a plurality of first test results is as second test result;
Upgrade the link unit,, upgrade the link attenuation value automatically according to said second test result.
A kind of digital intermediate frequency module, said digital intermediate frequency module comprises:
Micro-control unit is used to receive test command that monitor board sends and test channel number; When said test signal after reception antenna receives, receive the channel power querying command that said monitor board sends; Detected test signal input power is fed back to said monitor board,, obtain the isolation between antennas value so that said monitor board calculates the difference of test signal power output and said test signal input power;
The test signal generation unit is used for after receiving said test command, opening test channel and number produces corresponding test signal according to said test channel;
The test signal input unit is used for after receiving said channel power querying command, detecting said test signal input power.
A kind of power amplifier module, said power amplifier module comprises:
Receiving element is used to receive the power amplifier that monitor board sends and opens order, and opens order according to said power amplifier and open power amplifier module; Receive the test signal that the digital intermediate frequency module produces;
Amplifying unit is used for said test signal is amplified;
Transmitting element, with the test signal after the said amplification through transmission antennas transmit;
The power output detecting unit is used to detect the test signal power output of said test signal and feeds back to monitor board.
A kind of system of definite isolation between antennas, said system comprises:
Monitor board is used for sending test command and test channel number to the digital intermediate frequency module; Send power amplifier to power amplifier module and open order; To said digital intermediate frequency module transmitting channel power querying command; Calculate the test signal power output of acquisition and the difference of test signal input power, obtain the isolation between antennas value;
The digital intermediate frequency module, said test command that is used for sending according to said monitor board and said test channel number are opened test channel, and number produce corresponding test signal according to said test channel; Channel power querying command according to said monitor board sends makes said monitor board obtain said test signal input power;
Power amplifier module is used for opening order according to said power amplifier and opens power amplifier module; Receive the test signal that the digital intermediate frequency module produces; Test signal is amplified, and with the test signal after the said amplification through transmission antennas transmit, detect the test signal power output and also feed back to said monitor board.
This shows that the present invention has following beneficial effect:
The present invention produces the isolation degree test signal automatically and detects the test signal power output through equipment active or passive triggering, catches aerial test signal; Detect the isolation degree test signal input power that reception antenna is received,, realized automatic test, the calculating of isolation between antennas through the isolation under the algorithm computation current environment; Broken away from of the dependence of test antenna isolation to expensive instruments such as signal generator, spectrum analyzers; Can reduce the project installation difficulty greatly and, really realize the Fast Installation of engineering user's operational capacity requirement, equipment open station, intelligent operation automatically; Save engineering and opened the station cost, reduced the equipment O&M cost.
In addition, the present invention can prevent the self-excitation of amplifier winding according to the gain of the isolation situation automatic adjustment equipment of environment space, the loss of having avoided loss of communications that equipment causes because of the self-excitation fault and hardware to burn.
Description of drawings
Fig. 1 is a base station transceiver antenna scheme of installation;
Fig. 2 is a repeater dual-mode antenna scheme of installation;
Fig. 3 is the flow chart that the present invention calculates the method for isolation between antennas automatically;
Fig. 4 is the flow chart that the present invention calculates a kind of specific embodiment of method of isolation between antennas automatically;
Fig. 5 is to the flow chart of the data handling procedure of several antenna isolation values among the present invention;
Fig. 6 is the planning sketch map of every channel test time;
Fig. 7 is the planning sketch map of different channels testing time;
Fig. 8 is a kind of sketch map of the present invention's device of calculating isolation between antennas automatically;
Fig. 9 is the structural representation of a kind of digital intermediate frequency module of the present invention;
Figure 10 is the structural representation of a kind of power amplifier module of the present invention;
Figure 11 is a kind of system block diagram of the present invention system of calculating isolation between antennas automatically;
Figure 12 is a kind of concrete system block diagram of the present invention system of calculating isolation between antennas automatically.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and embodiment the embodiment of the invention done further detailed explanation.
The present invention calculates the method for isolation between antennas automatically; Be to test acquisition through expensive instruments such as signal generator, spectrum analyzers to isolation between antennas in the prior art; Cause the problem of project installation inconvenience; Realize that this method comprises: monitor board sends test command and test channel number to the digital intermediate frequency module, so that the digital intermediate frequency module is opened test channel after receiving test command and number produce the test signal of correspondence according to test channel; Monitor board sends power amplifier to power amplifier module and opens order, so that power amplifier module is opened receiving after power amplifier is opened order; Test signal is amplified through power amplifier module and after transmission antennas transmit, power amplifier module detects the test signal power output, feeds back to monitor board; When test signal after reception antenna receives, monitor board is to digital intermediate frequency module transmitting channel power querying command, the digital intermediate frequency module detects the test signal input power, feeds back to monitor board; Monitor board calculates the difference of test signal power output and test signal input power, obtains the isolation between antennas value.
Based on above-mentioned thought, referring to shown in Figure 3, the method that the present invention calculates isolation between antennas automatically may further comprise the steps:
Step 101: send test command and test channel number to the digital intermediate frequency module, so that the digital intermediate frequency module is opened test channel after receiving test command and number produce the test signal of correspondence according to test channel;
Step 102: send power amplifier to power amplifier module and open order, so that power amplifier module is opened receiving after power amplifier is opened order;
Step 103: test signal is amplified through power amplifier module and after transmission antennas transmit, is obtained the detected test signal power output of power amplifier module from power amplifier module;
Step 104: when test signal after reception antenna receives, to digital intermediate frequency module transmitting channel power querying command, obtain the detected test signal input power of digital intermediate frequency module from the digital intermediate frequency module;
Step 105: calculate the difference of test signal power output and test signal input power, obtain the isolation between antennas value.
Like this, the present invention can produce the isolation degree test signal automatically and detect the test signal power output, catch aerial test signal after; Detect the test signal input power that reception antenna is received,, realized automatic test, the calculating of isolation between antennas through the isolation under the algorithm computation current environment; Broken away from of the dependence of test antenna isolation to expensive instruments such as signal generator, spectrum analyzers; Can reduce the project installation difficulty greatly and, really realize the Fast Installation of engineering user's operational capacity requirement, equipment open station, intelligent operation automatically; Save engineering and opened the station cost, reduced the equipment O&M cost.
The automatic test of isolation can power up the back at equipment at every turn and carry out, and also can initiation initiatively be set through engineering staff or user.
In the above-described embodiments, the concrete principle of calculating isolation between antennas value is:
When testing current space isolation Ib if desired, monitor board sends test command and test channel number to the digital intermediate frequency module, and the digital intermediate frequency module is opened TCH test channel; Produce local oscillation signal by the signal generator in the digital intermediate frequency module according to test channel number; Produce corresponding test signal through D/A, its power output is P1, and gain is the amplification of G1 to this test signal through power amplifier module; Its power becomes P2; Wherein P2=P1+G1 goes out through transmission antennas transmit, and power amplifier module can detect the power output P2 of test signal and feed back to monitor board simultaneously.
Power is after the test signal of P2 is launched, and transmits through free space, and gets into reception antenna ends with some interference signals, and this moment, test signal became P3 through power after the spatial fading.Gain is the amplification of G2 to test signal through the LNA module subsequently, and its power becomes P4, wherein P4=P3+G2; Get into the digital intermediate frequency module; Through A/D conversion, filtering (filtering interference signals), the digital intermediate frequency module detects the power P 4 of test signal and feeds back to monitor board, and monitor board can draw P3=P4-G2; So just can calculate the attenuation of free space, i.e. isolation between antennas Ib=P2-P3.
Referring to shown in Figure 4, the present invention calculates a kind of concrete implementation method of isolation between antennas automatically, may further comprise the steps:
Step 201: send test command and test channel number to the digital intermediate frequency module, so that the digital intermediate frequency module is opened test channel after receiving test command and number produce the test signal of correspondence according to test channel;
Step 202: to digital intermediate frequency module transmitting channel power querying command, so that the digital intermediate frequency module detects spacing wave power and feeds back to monitor board;
Step 203: whether judge this spacing wave power less than first threshold, if, then continue to carry out subsequent step, if not, then reselect test channel number, and return step 201;
Whether detect spacing wave power by the digital intermediate frequency module is to exist in the space and the same useful signal frequently of the test channel of current selection in order to detect; The perhaps bigger same frequency interference signal of strength ratio; If there is homogenous frequency signal,, need reselect test channel for interference to test.
Step 204: send the decay order to power amplifier module;
The attenuation of 20dB can be set, can safe operation after opening to guarantee power amplifier module.
Step 205: send power amplifier to power amplifier module and open order, so that power amplifier module is opened receiving after power amplifier is opened order;
Step 206: test signal is amplified through power amplifier module and after transmission antennas transmit, is obtained the detected test signal power output of power amplifier module from power amplifier module;
Step 207: whether the difference of judging nominal power output and test signal power output is second threshold value, if, then continue to carry out subsequent step, if not, then adjust power amplifier module, and repeating step 206;
Can judge specifically whether power output is nominal power output-3dB, this is because the flatness of working passband there are differences, and after guaranteeing to change test channel, it is consistent relatively that power output keeps.
Step 208: send several times channel power querying command to the digital intermediate frequency module, obtain several test signal input powers;
Step 209: calculate the difference of test signal power output and each test signal input power respectively, obtain several isolation between antennas values, and several isolation between antennas values are handled, draw first test result of test this time;
Step 210: judge whether to proceed test, if, then send and close the power amplifier order to power amplifier module, reselect test channel number, return step 201, if not, then carry out subsequent step;
Can judge whether to proceed test through automatic test counter, after the isolation value that draws a test channel test, test counter subtracts 1 automatically, judges whether automatic test counter value is 0, if be not 0, then reselect channel and tests.
If it is N that automatic test counter value is set, then can test N test channel, obtain N test result, can assess better like this when the rational isolation value of front space.
Step 211: a plurality of first test results of repeatedly being tested, choose a test result in a plurality of first test results as second test result;
Step 212:, upgrade the link attenuation value automatically according to second test result.
The method of this calculating isolation between antennas; When same test channel is tested; The input power of inquiry several times test signal can calculate several isolation between antennas values in the test this time like this, and these several isolation between antennas values are handled; Can draw this time test result of test, i.e. first test result; Through repeatedly selecting the mode of test channel, the isolation between antennas in space is repeatedly tested, reevaluate out when the rational isolation value of front space, promptly second test result according to second test result, can be upgraded the link attenuation value automatically.
Automatically upgrade the link attenuation value, can play the effect that ensures communication, protection functions of the equipments.Monitor board can be according to the situation of the current downlink gain G of equipment; Judge with current space isolation test result Ib; Require to guarantee Ib >=G+10dB generally speaking, when Ib＜G+10, monitor board can be controlled uplink downlink and decay; Reduce the gain of uplink downlink, up to satisfying Ib >=G+10dB.
The decay of control uplink downlink mainly is a system in order to keep link balance, and uplink downlink kept up gain less than descending gain 3-6dB basically when common engineering was used.
In the above-described embodiments, can same test channel test several times isolation between antennas value be handled these several isolation between antennas values, can obtain the test result of this test channel; Through repeatedly selecting the mode of test channel; Can repeatedly test the isolation between antennas in space, assess out isolation between antennas value, make test result more reasonable when front space; Simultaneously; The present invention can prevent the self-excitation of amplifier winding according to the gain of the isolation situation automatic adjustment equipment of environment space, the loss of having avoided loss of communications that equipment causes because of the self-excitation fault and hardware to burn.
When same test channel is tested, to the concrete data handling procedure of several isolation between antennas values of obtaining, referring to shown in Figure 5.If every channel test need read performance number N1 time, the data handling procedure of the N1 that then calculates an isolation between antennas value comprises:
Step 2091: cast out a maximum and a minimum value;
Step 2092: the mean value that calculates a remaining N1-2 data;
Step 2093: the second largest value in mean value and the N1 data relatively;
Step 2094: whether the difference of judging the second largest value in mean value and the N1 data is within 3dB; If; Then get the isolation between antennas test result of the mean value of N1-2 data as this time test, i.e. if first test result is not; Then get second largest value in N1 the data as the isolation between antennas test result of this time test, i.e. first test result.
Equipment powers at every turn or engineering staff or user initiatively are provided with when initiating; Can establish isolation tests N2 time automatically; Can obtain N2 isolation numerical value like this; Processing to N2 isolation between antennas test result is to choose the second little value as final isolation between antennas test result, i.e. second test result.
To the planning of every channel test time, referring to shown in Figure 6, after opening, power amplifier switch needs certain time interval, and each monitor board also needs certain time interval between digital intermediate frequency module transmitting channel power querying command.Can establish after power amplifier switch opens about 10ms, monitor board is to digital intermediate frequency module transmitting channel power querying command, every at a distance from the 10ms inquiry once, if inquire about 20 times altogether, then every channel test time takies and is about 200ms.
To the planning of different channels testing time, referring to shown in Figure 7, the flatness of working passband there are differences, and after the change test channel number, need readjust the pad value of attenuator, guarantees the consistency of power output.Owing to there is the adjustment of test parameter, need to reserve certain processing time, can fix tentatively channel test blanking time is 1s, can also make amendment according to the result of follow-up test.
Correspondingly, the present invention also provides a kind of device of automatic calculating isolation between antennas, and is as shown in Figure 8, is a kind of sketch map of this device.In this embodiment, said device comprises: first transmitting element 11, second transmitting element 12, first acquiring unit 13, the 3rd transmitting element 14, second acquisition unit 15 and computing unit 16.
Wherein, first transmitting element 11 is used for sending test command and test channel number to the digital intermediate frequency module, so that the digital intermediate frequency module is opened test channel after receiving test command and number produce the test signal of correspondence according to test channel;
Second transmitting element 12 is used for sending power amplifier to power amplifier module and opens order, so that power amplifier module is opened receiving after power amplifier is opened order;
First acquiring unit 13 is used in test signal through the power amplifier module amplification and after transmission antennas transmit, from the detected test signal power output of power amplifier module acquisition power amplifier module;
The 3rd transmitting element 14, be used for when test signal after reception antenna receives, to digital intermediate frequency module transmitting channel power querying command;
Wherein, Second acquisition unit specifically is used to receive the detected test signal power after the LNA module is amplified and carried out A/D conversion, filtering interference signals of digital intermediate frequency module; After deducting the power amplification value of LNA module, obtain the test signal input power.
In addition, the device that calculates isolation between antennas automatically can also comprise: first judging unit, second judging unit, first processing unit, the 3rd judging unit, second processing unit, upgrade the link unit.
Wherein, first judging unit is used to judge that whether spacing wave power is less than first threshold;
First selected cell is used for when spacing wave power is not less than first threshold, reselects test channel number;
Second judging unit is used to judge whether the nominal power output of test signal and the difference of test signal power output are second threshold value;
Adjustment unit is used for when the difference of the nominal power output of test signal and test signal power output is not second threshold value, the adjustment power amplifier module;
First processing unit is used for several isolation between antennas values are handled, and draws first test result of test this time;
The 3rd judging unit is used for after first test result that obtains test this time, judging whether to proceed test;
The 4th transmitting element is used for when proceeding to test, and sends to power amplifier module and closes the power amplifier order;
Second selected cell is used for when proceeding to test, to power amplifier module send close the power amplifier order after, reselect test channel number;
Second processing unit, a test result that is used for choosing a plurality of first test results is as second test result;
Upgrade the link unit,, upgrade the link attenuation value automatically according to second test result.
Automatically the device that calculates isolation between antennas can be a monitor board; This device can obtain the isolation between antennas under the current environment according to test signal power output of obtaining and test signal input power, has realized automatic test, the calculating of isolation between antennas; Broken away from of the dependence of test antenna isolation to expensive instruments such as signal generator, spectrum analyzers; Can reduce the project installation difficulty greatly and, really realize the Fast Installation of engineering user's operational capacity requirement, equipment open station, intelligent operation automatically; Save engineering and opened the station cost, reduced the equipment O&M cost.
In addition, the device that the present invention calculates isolation between antennas automatically can prevent the self-excitation of amplifier winding according to the gain of the isolation situation automatic adjustment equipment of environment space, the loss of having avoided loss of communications that equipment causes because of the self-excitation fault and hardware to burn.
Correspondingly, the present invention also provides a kind of digital intermediate frequency module, and is as shown in Figure 9, is a kind of structural representation of this digital intermediate frequency module, and this digital intermediate frequency module comprises: micro-control unit 21, test signal generation unit 22 and test signal input unit 23.
Wherein, micro-control unit 21 is used to receive test command that monitor board sends and test channel number; When test signal after reception antenna receives, receive the channel power querying command that monitor board sends; Detected test signal input power is fed back to monitor board,, obtain the isolation between antennas value so that monitor board calculates the difference of test signal power output and test signal input power;
Test signal generation unit 22 is used for after receiving test command, opening test channel and number produces corresponding test signal according to test channel;
Test signal input unit 23 is used for after receiving the channel power querying command, detects the test signal input power.
Test signal generation unit 22 can comprise signal generator 221, D/A converting unit 222;
D/A converting unit 222 is used for that local oscillation signal is carried out the D/A conversion and generates test signal.
Test signal input unit 23 can comprise A/D converting unit 231, filter 232, input power detecting unit 233;
A/D converting unit 231 is used for the test signal of input after amplifying through the LNA module is carried out the A/D conversion;
Input power detecting unit 233 is used to detect test signal input power or spacing wave power and feeds back to monitor board.
This digital intermediate frequency module can realize the generation of test signal through the test signal generation unit; Simultaneously; Can realize detection through the test signal input unit, detected test signal input power is fed back to monitor board, so that monitor board is accomplished the isolation between antennas calculation process the test signal input power; Broken away from of the dependence of test antenna isolation, can reduce the project installation difficulty greatly and user's operational capacity requirement to expensive instruments such as signal generator, spectrum analyzers.
Correspondingly, the present invention also provides a kind of power amplifier module, and is shown in figure 10, is a kind of structural representation of this power amplifier module, and this power amplifier module comprises: receiving element 31, amplifying unit 32, transmitting element 33 and power output detecting unit 34.
Receiving element 31 is used to receive the power amplifier that monitor board sends and opens order, and opens order according to power amplifier and open power amplifier module; Receive the test signal that the digital intermediate frequency module produces;
Amplifying unit 32 is used for test signal is amplified;
Transmitting element 33, with the test signal after amplifying through transmission antennas transmit;
Power output detecting unit 34 is used to detect the test signal power output of test signal and feeds back to monitor board.
This power amplifier module can be accomplished test signal is amplified and by the function of transmission antennas transmit; Simultaneously; Can realize detection through the power output detecting unit to the test signal power output; And detected test signal power output fed back to monitor board; So that monitor board is accomplished the isolation between antennas calculation process, broken away from of the dependence of test antenna isolation to expensive instruments such as signal generator, spectrum analyzers, can reduce the project installation difficulty greatly and to user's operational capacity requirement.
Correspondingly, the present invention also provides a kind of system of automatic calculating isolation between antennas, and is shown in figure 11, is a kind of system block diagram of this system, and this system comprises: monitor board 1, digital intermediate frequency module 2, power amplifier module 3.
Wherein, monitor board 1 is used for sending test command and test channel number to the digital intermediate frequency module; Send power amplifier to power amplifier module and open order; To digital intermediate frequency module transmitting channel power querying command; Calculate the test signal power output of acquisition and the difference of test signal input power, obtain the isolation between antennas value;
Digital intermediate frequency module 2, the test command that is used for sending according to monitor board and test channel number are opened test channel, and number produce the test signal of correspondence according to test channel; According to the channel power querying command that monitor board sends, make monitor board obtain the test signal input power;
Power amplifier module 3 is used for opening order according to said power amplifier and opens power amplifier module; Receive the test signal that the digital intermediate frequency module produces; Test signal is amplified, and with the test signal after the said amplification through transmission antennas transmit, detect the test signal power output and also feed back to monitor board.
The operation principle of native system is:
Monitor board sends test command and test channel number to the digital intermediate frequency module, and the digital intermediate frequency module is opened test channel after receiving said test command, and the test signal of generation test channel correspondence; Monitor board sends power amplifier to power amplifier module and opens order, and power amplifier module is opened receiving after power amplifier is opened order; Power amplifier module amplifies test signal, and test signal is after transmission antennas transmit, and power amplifier module detects the test signal power output and feeds back to monitor board; When test signal after reception antenna receives, monitor board is to digital intermediate frequency module transmitting channel power querying command, monitor board obtains the test signal input power from the digital intermediate frequency module; Monitor board calculates the difference of test signal power output and test signal input power, obtains the isolation between antennas value.
The present invention calculates a kind of concrete system of the system of isolation between antennas automatically, referring to shown in Figure 12.Wherein, monitor board 1 can be the device of a kind of automatic calculating isolation between antennas provided by the invention, and digital intermediate frequency module 2 can be a kind of digital intermediate frequency module provided by the invention, and power amplifier module 3 can be a kind of power amplifier module provided by the invention.
Digital intermediate frequency module 2 can also be used to monitor spacing wave power and feed back to monitor board;
Monitor board 1 can also be used to judge that whether spacing wave power is less than first threshold; If not; Reselect test channel number; Send test command and test channel number to the digital intermediate frequency module, so that the digital intermediate frequency module is opened test channel after receiving test command and number produce the test signal of correspondence according to test channel; Judge whether the nominal power output of test signal and the difference of test signal power output are second threshold value, if not, then adjust power amplifier module, and regain the detected test signal power output of power amplifier module; After obtaining the detected test signal power output of power amplifier module, send several times channel power querying command, obtain several test signal input powers to the digital intermediate frequency module; Calculate the difference of test signal power output and each test signal input power respectively, obtain several isolation between antennas values, accomplish the test of test channel; Several isolation between antennas values are handled, obtained first test result of test this time; After first test result that obtains test this time, judge whether to proceed test, if not, EOT then; If; Close the power amplifier order to the power amplifier module transmission; Reselect test channel number, send test command and test channel number, so that the digital intermediate frequency module is opened test channel after receiving test command and number produce the test signal of correspondence according to test channel to the digital intermediate frequency module; A plurality of first test results of repeatedly being tested are chosen a test result in a plurality of first test results as second test result; According to second test result, upgrade the link attenuation value automatically.
The concrete operation principle of native system is:
Monitor board sends test command and test channel number to the digital intermediate frequency module, and the digital intermediate frequency module is opened test channel after receiving said test command, and number produces local oscillation signal according to test channel, produces the test signal of correspondence through the D/A conversion; Whether monitor board judges spacing wave power less than first threshold to digital intermediate frequency module transmitting channel power querying command, if not; Then reselect test channel number; And send test command and test channel number to the digital intermediate frequency module again, if then continue the execution subsequent step; Monitor board sends power amplifier to power amplifier module and opens order, and power amplifier module is opened receiving after said power amplifier is opened order; Power amplifier module amplifies test signal, and test signal is after transmission antennas transmit, and power amplifier module detects the test signal power output and feeds back to monitor board; Monitor board judges whether the difference of nominal power output and test signal power output is second threshold value, if not, then adjust power amplifier module, and regain the detected test signal power output of power amplifier module, if then continue to carry out subsequent step; Monitor board sends several times channel power querying command to the digital intermediate frequency module; The digital intermediate frequency module detects the test signal power after the LNA module is amplified and carried out A/D conversion, filtering interference signals and feeds back to monitor board; After monitor board deducts the power amplification value of LNA module, obtain the test signal input power; Monitor board calculates the difference of test signal power output and each test signal input power respectively, obtains several isolation between antennas values; Said several isolation between antennas values are handled, obtained first test result of test this time; Monitor board judges whether to proceed test; If; Then send and close the power amplifier order, reselect test channel number, and send test command and test channel number to the digital intermediate frequency module to power amplifier module; Make the digital intermediate frequency module open test channel, and make the digital intermediate frequency module according to the test channel number corresponding test signal of generation; If, then do not carry out subsequent step; A plurality of first test results that monitor board is repeatedly tested are chosen a test result in said a plurality of first test result as second test result; Monitor board upgrades the link attenuation value automatically according to second test result.
Automatically calculate in the system of isolation between antennas in the present invention, can produce the isolation degree test signal automatically, after power amplifier module amplification and emission, detecting the test signal power output by the digital intermediate frequency module; After the test signal that reception antenna is received; The digital intermediate frequency module can detect the test signal input power, and monitor board can utilize the test signal power output of acquisition and test signal input power to calculate the isolation between antennas under the current environment, has realized automatic test, the calculating of isolation between antennas; Broken away from of the dependence of test antenna isolation to expensive instruments such as signal generator, spectrum analyzers; Can reduce the project installation difficulty greatly and, really realize the Fast Installation of engineering user's operational capacity requirement, equipment open station, intelligent operation automatically; Save engineering and opened the station cost, reduced the equipment O&M cost.
Simultaneously, monitor board can also prevent the self-excitation of amplifier winding according to the gain of current isolation between antennas situation automatic adjustment equipment, the loss of having avoided loss of communications that equipment causes because of the self-excitation fault and hardware to burn.
Need to prove that each embodiment adopts the mode of going forward one by one to describe in this specification, what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For disclosed system of embodiment or device, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part is partly explained referring to method and is got final product.
Also need to prove; In this article; Relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint relation or the order that has any this reality between these entities or the operation.And; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements; But also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can be directly with the software modules of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (11)
1. the method for a definite isolation between antennas is characterized in that, said method comprises:
Send test command and test channel number to the digital intermediate frequency module, so that said digital intermediate frequency module is opened test channel after receiving said test command and number produce the test signal of correspondence according to said test channel;
Send power amplifier to power amplifier module and open order, so that said power amplifier module is opened receiving after said power amplifier is opened order;
Through said power amplifier module amplification and after transmission antennas transmit, obtain the detected test signal power output of said power amplifier module in said test signal from said power amplifier module;
When said test signal after reception antenna receives, to said digital intermediate frequency module transmitting channel power querying command, obtain the detected test signal input power of said digital intermediate frequency module from said digital intermediate frequency module;
Calculate the difference of said test signal power output and said test signal input power, obtain the isolation between antennas value.
2. method according to claim 1 is characterized in that, said method also comprises:
After the test signal of said digital intermediate frequency module, send space channel power querying command to the digital intermediate frequency module, so that the digital intermediate frequency module detects spacing wave power according to test channel number generation correspondence; Obtain the detected said spacing wave power of said digital intermediate frequency module from said digital intermediate frequency module; Whether judge said spacing wave power less than first threshold, if then continue to carry out subsequent step; If not; Then reselect test channel number, send test command and test channel number, so that said digital intermediate frequency module is opened test channel and number produce the test signal of correspondence according to said test channel to said digital intermediate frequency module.
3. method according to claim 1 is characterized in that, said method also comprises:
After obtaining the detected test signal power output of said power amplifier module; Whether the difference of judging nominal power output and said test signal power output is second threshold value; If then continue to carry out subsequent step, if not; Then adjust power amplifier module, and regain the detected test signal power output of said power amplifier module.
4. method according to claim 1 is characterized in that, said method also comprises:
After obtaining the detected test signal power output of said power amplifier module, send several times channel power querying command, obtain several said test signal input powers to said digital intermediate frequency module; Calculate the difference of said test signal power output and each test signal input power respectively, obtain several isolation between antennas values; Said several isolation between antennas values are handled, obtained first test result of test this time.
5. method according to claim 4 is characterized in that, said method also comprises:
After first test result that obtains said test this time, judge whether to proceed test, if not, EOT then; If; Close the power amplifier order to the power amplifier module transmission; Reselect test channel number; Send test command and test channel number to said digital intermediate frequency module, make said digital intermediate frequency module open test channel, and make said digital intermediate frequency module number produce the test signal of correspondence according to test channel; A plurality of first test results of repeatedly being tested are chosen a test result in said a plurality of first test result as second test result.
6. method according to claim 5 is characterized in that, said method also comprises:
According to said second test result, upgrade the link attenuation value automatically.
7. the device of a definite isolation between antennas is characterized in that, said device comprises:
First transmitting element is used for sending test command and test channel number to the digital intermediate frequency module, so that said digital intermediate frequency module is opened test channel after receiving said test command and number produce the test signal of correspondence according to said test channel;
Second transmitting element is used for sending power amplifier to power amplifier module and opens order, so that said power amplifier module is opened receiving after said power amplifier is opened order;
First acquiring unit is used for obtaining the detected test signal power output of said power amplifier module in the said power amplifier module amplification of said test signal process and after transmission antennas transmit from said power amplifier module;
The 3rd transmitting element, be used for when said test signal after reception antenna receives, to said digital intermediate frequency module transmitting channel power querying command;
Second acquisition unit is used for obtaining the detected test signal input power of said digital intermediate frequency module from said digital intermediate frequency module;
Computing unit is used to calculate the difference of said test signal power output and said test signal input power, obtains the isolation between antennas value.
8. device according to claim 7 is characterized in that, said device also comprises:
First judging unit is used to judge that whether spacing wave power is less than first threshold;
First selected cell is used for when said spacing wave power is not less than said first threshold, reselects test channel number;
Second judging unit is used to judge whether the nominal power output of said test signal and the difference of said test signal power output are second threshold value;
Adjustment unit is used for when the difference of the nominal power output of said test signal and said test signal power output is not second threshold value, adjusting said power amplifier module;
First processing unit is used for several isolation between antennas values are handled, and draws first test result of test this time;
The 3rd judging unit is used for after first test result that obtains said test this time, judging whether to proceed test;
The 4th transmitting element is used for when proceeding to test, and sends to said power amplifier module and closes the power amplifier order;
Second selected cell is used for when proceeding to test, to said power amplifier module send close the power amplifier order after, reselect test channel number;
Second processing unit, a test result that is used for choosing said a plurality of first test results is as second test result;
Upgrade the link unit,, upgrade the link attenuation value automatically according to said second test result.
9. a digital intermediate frequency module is characterized in that, said digital intermediate frequency module comprises:
Micro-control unit is used to receive test command that monitor board sends and test channel number; When said test signal after reception antenna receives, receive the channel power querying command that said monitor board sends; Detected test signal input power is fed back to said monitor board,, obtain the isolation between antennas value so that said monitor board calculates the difference of test signal power output and said test signal input power;
The test signal generation unit is used for after receiving said test command, opening test channel and number produces corresponding test signal according to said test channel;
The test signal input unit is used for after receiving said channel power querying command, detecting said test signal input power.
10. a power amplifier module is characterized in that, said power amplifier module comprises:
Receiving element is used to receive the power amplifier that monitor board sends and opens order, and opens order according to said power amplifier and open power amplifier module; Receive the test signal that the digital intermediate frequency module produces;
Amplifying unit is used for said test signal is amplified;
Transmitting element, with the test signal after the said amplification through transmission antennas transmit;
The power output detecting unit is used to detect the test signal power output of said test signal and feeds back to monitor board.
11. the system of a definite isolation between antennas is characterized in that, said system comprises:
Monitor board is used for sending test command and test channel number to the digital intermediate frequency module; Send power amplifier to power amplifier module and open order; To said digital intermediate frequency module transmitting channel power querying command; Calculate the test signal power output of acquisition and the difference of test signal input power, obtain the isolation between antennas value;
The digital intermediate frequency module, said test command that is used for sending according to said monitor board and said test channel number are opened test channel, and number produce corresponding test signal according to said test channel; Channel power querying command according to said monitor board sends makes said monitor board obtain said test signal input power;
Power amplifier module is used for opening order according to said power amplifier and opens power amplifier module; Receive the test signal that the digital intermediate frequency module produces; Test signal is amplified, and with the test signal after the said amplification through transmission antennas transmit, detect the test signal power output and also feed back to said monitor board.
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| CN113111526A (en) * | 2021-04-21 | 2021-07-13 | 北京航空航天大学 | Antenna isolation degree prediction method based on near-field test data of receiving and transmitting antenna, storage medium and device |
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