CN101299858A - Signal processing device, method and intelligent antenna test system using said apparatus - Google Patents
Signal processing device, method and intelligent antenna test system using said apparatus Download PDFInfo
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- CN101299858A CN101299858A CNA2007100989822A CN200710098982A CN101299858A CN 101299858 A CN101299858 A CN 101299858A CN A2007100989822 A CNA2007100989822 A CN A2007100989822A CN 200710098982 A CN200710098982 A CN 200710098982A CN 101299858 A CN101299858 A CN 101299858A
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Abstract
The present invention discloses a signal processing device, including a splitter. The input terminal of the splitter receives ascending signals, each output terminal of the splitter is in series connection with an adjustable attenuator and a phase shifter in sequence, each phase shifter outputs the ascending signals after processing. Because the invention adopts a wired surroundings test, the signals received by the base station will not interfered by external factor, and the signal at antenna connection point is stable, thereby quantitative test can be carried out to the index performance of intelligent antenna. The invention can divide one channel of output of terminal or apparatus through the signal processing device into multi-channel, the power amplitude and phase of each channel of radiofrequency signal after dividing can be regulated, thereby being capable of simulating one channel of radiofrequency signal into multi-channel of receive signals of the intelligent antenna, testing the performance of intelligent antenna, and being capable of obtaining the integral performance of intelligent antenna according to the test result. The present invention also discloses an intelligent antenna test system.
Description
Technical field
The present invention relates to the smart antenna measuring technology, relate in particular to a kind of intelligent antenna test system that is used for signal processing apparatus, method and this device of employing of smart antenna test.
Background technology
What used the base station of TD-SCDMA (TD SDMA) system all is smart antenna.Smart antenna is one of key technology of TD-SCDMA system, also is the advantage place of TD-SCDMA system.The up effect that has space diversity and suppress to disturb of smart antenna, descending have antenna figuration function, thereby reduce other user's interference, and then reduce the interference level of whole system, improves the capacity of system.
For grasping every index performance of smart antenna, need test smart antenna.At present, the method for test smart antenna every index performance is when base station and portable terminal carry out radio communication, in base station side every index performance of smart antenna is measured.Wherein, the index performance of smart antenna mainly comprises AOA (Angle Of Arrival, arrival bearing angle), disturbs the gain and the upstream multi-antenna gain that suppress (interferencesuppression).
But, when in wireless environment, the index performance of smart antenna being tested, because the complexity and the uncertainty of wireless environment, the signal that the base station receives is than the interference that is easier to be subjected to extraneous factor, the pickup electrode instability that measurement point (antenna connector) is located, deviation also often appears in test result, thereby can't carry out quantitative test to the index performance of smart antenna.
In addition, the index performance that the basic at present mode of using many antennas to close the road is tested smart antenna, such mode is equivalent to adopt single antenna to test, thereby makes test result can not embody the performance of smart antenna fully.
Summary of the invention
In view of this, the technical problem that the present invention solves provides the intelligent antenna test system of a kind of signal processing apparatus, method and this device of employing, this device, method are used for the test of smart antenna, signal that can not only stably measured point place, and can accurately control the signal at base station measurement point place, thereby can realize quantitative test, thereby can obtain the overall performance of smart antenna according to test result to the index performance of smart antenna.
For this reason, technical scheme provided by the invention is as follows:
A kind of signal processing apparatus comprises a splitter, and the input of described splitter receives upward signal, is in series with adjustable attenuator and phase shifter successively, each the road upward signal after each phase shifter output is handled at each output of described splitter.
Wherein, also be connected with the loop device respectively at the output of every road phase shifter, the output of phase shifter is connected with the first I/O end of loop device, the signal after the second I/O end output of each loop device is handled, and receive each road downstream signal;
The 3rd I/O end of each loop device is connected with the input of a mixer respectively, and the downstream signal behind the road is closed in described mixer output.
Wherein, also comprise a loop device, the first I/O termination of this loop device is received upward signal, output downstream signal, and the second I/O end is connected with the input of described splitter, and the 3rd I/O end is connected with the output of described mixer.
Wherein, also comprise 1 fen 2 splitter, the input of described 1 minute 2 splitter receives upward signal, output downstream signal, and two outputs of described 1 minute 2 splitter connect the input of described splitter and the output of described mixer respectively;
The loop device of also connecting respectively between the 3rd I/O end of each loop device and the described mixer, the 3rd I/O end of each loop device is connected with the 3rd I/O end of the loop device of described each series connection, and the first I/O end of the loop device of described each series connection is connected with the input of described mixer.
Wherein, the antenna amount of the shunt quantity of described splitter and smart antenna equates.
The present invention also proposes a kind of intelligent antenna test system, comprise a signal generating unit and antenna connector, wherein, also comprise a signal processing apparatus, this device comprises a splitter, the input of described splitter is connected with the output of described signal generating unit, is in series with adjustable attenuator and phase shifter successively at each output of described splitter, and the output of each phase shifter is connected with each the corresponding interface of described antenna connector respectively.
Wherein, also be connected with the loop device respectively at the output of each phase shifter, described signal generating unit also comprises input;
The output of phase shifter is connected with the first I/O end of loop device, and the second I/O end of each loop device is connected with each the corresponding interface of described antenna connector respectively;
The 3rd I/O end of each loop device is connected with the input of a mixer respectively, and the output of described mixer is connected with the input of described signal generating unit.
Wherein, when the output of described signal generating unit with when being input as same port, also comprise a loop device, the first I/O end of this loop device is connected with the I/O end of described signal generating unit, the second I/O end is connected with the input of described splitter, and the 3rd I/O end is connected with the output of described mixer.
Wherein, when the output of described signal generating unit with when being input as same port, also comprise 1 fen 2 splitter, the input of described 1 minute 2 splitter is connected with the I/O end of described signal generating unit, and two outputs of described 1 minute 2 splitter connect the input of described splitter and the output of described mixer respectively;
The loop device of also connecting respectively between the 3rd I/O end of each loop device and the described mixer, the 3rd I/O end of each loop device is connected with the 3rd I/O end of the loop device of described each series connection, and the first I/O end of the loop device of described each series connection is connected with the input of described mixer.
Wherein, the antenna amount of the shunt quantity of described splitter and smart antenna equates.
Based on above-mentioned device and system, the present invention also proposes a kind of signal processing method, comprising:
By wired reception upward signal;
Described upward signal is carried out shunt by the antenna number of smart antenna;
Press the amplitude and the phase place of the every road upward signal after the preset value adjustment along separate routes;
With adjusted each road upward signal by wired smart antenna that sends to.
Wherein, further comprise:
Multichannel downstream signal by wired reception smart antenna transmission;
Described multichannel downstream signal is closed the road, close downstream signal behind the road by wired transmission.
In the present invention, owing to adopt the test of cable environment, so the signal that receives of base station can not be subjected to the interference of extraneous factor, and the signal at antenna connector place is also very stable, can be to the quantitative test of the index performance of smart antenna.In the present invention, one tunnel radiofrequency signal of terminal or instrument output can be able to be divided into multichannel by signal processing apparatus, the power magnitude and the phase place of each the road radiofrequency signal along separate routes all can be adjusted, thereby one tunnel radiofrequency signal can be modeled as the multipath reception signal of smart antenna, performance to smart antenna is tested, and can obtain the overall performance of smart antenna according to test result.
Description of drawings
Fig. 1 is the application schematic diagram of signal processing apparatus;
Fig. 2 is a schematic diagram of signal processing apparatus;
Fig. 3 is arrival bearing's schematic diagram of intelligent antenna array;
Fig. 4 is that the device connection diagram that suppresses is disturbed in test;
Fig. 5 a, 5b are arrival bearing's schematic diagrames of this community user and neighbor cell user;
Fig. 6 is second schematic diagram of signal processing apparatus;
Fig. 7 is the 3rd schematic diagram of signal processing apparatus;
Fig. 8 is the 4th schematic diagram of signal processing apparatus.
Embodiment
When in wireless environment the index performance of smart antenna being tested, because the complexity and the uncertainty of wireless environment, the signal that the base station receives causes the jitter at antenna connector place than the interference that is easier to be subjected to extraneous factor.If the index performance of smart antenna is tested (as shown in Figure 1), then can avoid the interference of extraneous factor, the signal of the junction of stabilization signal processing unit S14 and antenna connector S13 to signal by cable environment.In addition, signal processing apparatus also needs the signal that signal generating unit S15 sends is handled, thus multipath reception signal that can the simulated intelligence antenna.The multiple signals that antenna connector S13 receives are sent to base station S11 after amplifying through TPA (power amplifier) S12.
For making those skilled in the art understand the present invention better, signal processing apparatus is further described in detail below in conjunction with specific embodiment.
Be the received signal of energy simulated intelligence antenna, need carry out shunt to the signal that signal generating unit sends by the antenna number of smart antenna.The antenna number of supposing smart antenna is 6, and the radio-frequency signal decomposition that then needs signal generating unit is sent is 6 radiofrequency signals.
Fig. 2 is a schematic diagram of signal processing apparatus, and in this signal processing apparatus, the input of 1 minute 6 splitter S21 is connected with the output of signal generating unit S15 as the input of device.Each output of 1 minute 6 splitter S21 connect successively adjustable attenuator S22 and phase shifter S23, the output of each phase shifter S23 is connected with each the corresponding interface of antenna connector S13 respectively as the output of device.
After splitter S21 received the signal of signal generating unit S15 transmission in 1 minute 6, this signal is divided into 6 road signals, respectively by 6 outputs outputs.Adjustable attenuator S22 and phase-shifter S23 all will be passed through in each road of this 6 road signal.Adjust at the amplitude and the phase place of the signal on each road respectively.To the amplitude of every road signal and the adjustment of phase place is the key point of whole signal processing apparatus.Because the device loss and the phase difference basic fixed of uplink, so through above adjustment, substantially can guarantee the amplitude of every road signal and the more accurate relativeness of phase place, can make each road signal be similar to the actual signal of eating dishes without rice or wine fully, with the purpose of the received signal that reaches the simulated intelligence antenna.
When using signal processing apparatus that smart antenna is tested, need the support of emulated data.Can obtain many group signals by emulation, each signal in every group of signal has one to one with each antenna of smart antenna and concerns.At every group of aerial signal, provide the index such as measurement performance number (many antenna measurements power), receiving gain of theoretical value, forming coefficient, the antenna opening of the characteristic vector of theoretic AOA value, each antenna measurement.The value of the attenuator by the conditioning signal processing unit and the value of phase shifter then, make the arrival signal of base station meet the amplitude of each antenna in the emulation and the value of phase place, observe the test value of base station side then to above-mentioned every index, judge whether to conform to, come the realization of the function of testing base station and performance whether correct with simulation result.
When using signal processing apparatus test smart antenna, the single-channel RF signal of signal generating unit output can be linked to each other with the input port of splitter, the power magnitude of radiofrequency signal is adjustable, radiofrequency signal can be divided into 6 the tunnel (or 8 the tunnel in signal processing apparatus, concrete condition on the antenna array of smart antenna is decided), the phase place and the amplitude of each the road radiofrequency signal after can be controlled respectively along separate routes.Here, described signal generating unit includes but not limited to terminal and instrument.
By adjusting the pad value of each road adjustable attenuator, can adjust the power of each road radiofrequency signal, make the power of each road radiofrequency signal reach requirement.Because the loss of each road radio frequency cable is not quite identical, and also may there be difference in the loss of each employed device in road, so after the signal processing apparatus assembling is finished, should measure at the path loss of each path, as the part of these signal processing apparatus performance index, when using, reality compensate this part loss.
By adjusting each road phase shifter, can adjust the phase place of each road radiofrequency signal.Because the multi-channel rf signal of splitter output is obtained along separate routes by 1 tunnel radiofrequency signal, therefore can think that the start-phase of each road radiofrequency signal is consistent.By the phase place tilt value of each road phase shifter is set, can make the phase place relative value of each road radiofrequency signal reach requirement.Because smart antenna is to utilize that the phase difference of each antenna is weighted calculating in the antenna array, so smart antenna is to the absolute phase of each radiofrequency signal and insensitive, as long as the relative phase of each signal meets the demands.Because the time-delay of the phase place of each road radio frequency cable is not quite identical, and also may there be difference in the time-delay of the phase place of each employed device in road, so after the signal processing apparatus assembling is finished, should measure at the proper phase time delay of each path, as the part of these signal processing apparatus performance index, when using, reality compensate this part proper phase time delay.
As can be seen, one tunnel radiofrequency signal of terminal or instrument output can be able to be divided into multichannel by signal processing apparatus, the power magnitude and the phase place of each the road radiofrequency signal along separate routes all can be adjusted, thereby one tunnel radiofrequency signal is modeled as the multipath reception signal of smart antenna, and then can under cable environment, realizes test most of function of smart antenna and performance.
Below, with the measurement of AOA with to disturb the test that suppresses be example, the application of signal processing apparatus is described in further detail.
The measurement of AOA:
AOA is the arrival bearing angle, and the measurement result of AOA can be used for the location of UE (subscriber equipment).Because the TD-SCDMA system uses smart antenna, so can realize the mobile location service of single base station according to signal angle of arrival AOA and Timing Advance, the measurement of AOA has very big influence to locating accuracy.
For the sake of simplicity, suppose that here each path of signal processing apparatus has passed through path loss balancing and proper phase delay compensation, do not have deviation.
During test,,, make the signal power unanimity that arrives each antenna of base station through signal processing apparatus so the adjustable attenuator S22 on each path of signal processing apparatus can be arranged to identical value because the amplitude of each aerial signal does not have influence to the measurement of deflection.
Suppose that smart antenna is the antenna array of 6 antennas, antenna spacing is 0.5 λ, and λ is the wavelength of signal carrier.The arrival bearing of intelligent antenna array as shown in Figure 3, in view of UE in the actual use all is positioned at the far field, so arriving the angle of each antenna, signal can think equal, all be α, relative the 1st antenna, the signal that other antenna receives is compared the distance of having propagated (k-1) cos (α) * λ because propagation path is long slightly more with antenna 1.According to the corresponding 2 π radians of a wavelength, the phase deviation of antenna is ((k-1) cos (α) * λ * 180) %360 (degree), k=1,2,3,4,5,6.If get α=30 degree, then the phase deviation of each antenna is as shown in table 1.
Table 1
Press the phase deviation of each antenna shown in the table 1, the phase deviation of the phase shifter of 1-6 path in the signal processing apparatus of antenna 1-6 correspondence is set.So, the AOA angle at base station side measurement smart antenna gained should be exactly 30 degree.Other the angle of arrival in like manner can be set, can comprehensively test the measurement of AOA.
Disturb the test that suppresses:
Smart antenna is controlled weighting by adaptive algorithm, can adjust the directional diagram of antenna automatically, makes smart antenna form zero at interference radiating way and falls into, and interference signal is offset, and formed main beam in the useful signal direction, thereby reach the purpose that inhibition is disturbed.
The automatic adjustment of weight coefficient is exactly the forming process of wave beam.Wave beam forming by smart antenna can reduce multi-user interference greatly, also can reduce presence of intercell interference simultaneously.Disturb the test that suppresses to need two signal processing apparatus to smart antenna, the connection of signal processing apparatus as shown in Figure 4.
In Fig. 4, the different different users of signal generating unit representative.Because it mainly is the interference of eliminating the minizone that the interference of smart antenna suppresses, must simulate the user of one or more neighbor cells.When the user of simulation neighbor cell, can not use mobile phone terminal, can only instrumentation equipment, suppose that the first signal generating unit S61 is this community user, secondary signal generating unit S62 is the neighbor cell user.
When testing, the arrival bearing of this community user can be provided with arbitrarily, for example can be set to (concrete arrival bearing's method to set up are seen the measurement of AOA) such as 0,30,60 or 90 degree.The arrival bearing who supposes this community user is set to 90 degree, neighbor cell user's arrival bearing at first also is set to 90 degree, shown in Fig. 5 a.In this case, two users arrive antenna in same direction, and smart antenna can't suppress inter-user interference.
Adjust the transmitting power of the first signal generating unit S61, observe BLER (Block Error Rate) index of this community user in base station side, make BLER reach in the relatively more suitable scope of observing record signal power/noise power at this moment, the test result during as noiseless the inhibition.
Keep the arrival bearing of this community user constant, the arrival bearing by signal processing apparatus change neighbor cell user makes this community user and neighbor cell user's incident wave that an angle a be arranged, shown in Fig. 5 b.At this moment, because the airspace filter characteristic of smart antenna has greatly improved the receptivity of this community user, the BLER index can be lower than the situation shown in Fig. 5 a.
Reduce by the transmitting power of the first signal generating unit S61, make the BLER index near the situation shown in Fig. 5 a.The transmitting power difference of the first signal generating unit S61 is the gain that smart antenna airspace filter characteristic disturbs inhibition to bring under two kinds of situations.
Utilize said method, change the angle between this community user and the neighbor cell user, can draw the index of improving that smart antenna under the different situations disturb to suppress the systematic function brought, by with the comparison of theoretical value, can test the performance of smart antenna.
Signal processing apparatus shown in Figure 2 is only handled upward signal, and the signal imitation of going on the way that signal generating unit is exported is the upward signal that smart antenna receives.In actual applications, also need sometimes the downstream signal that smart antenna sends is returned to signal generating unit, for example, when signal generating unit was mobile phone terminal, mobile phone terminal not only sends upward signal also needed to receive downstream signal.
For the upward signal that terminal sends being modeled as the signal that smart antenna receives, the downstream signal that smart antenna sends can be returned to terminal again, the present invention proposes another kind of signal processing apparatus, and Fig. 6 is the schematic diagram of this signal processing apparatus.
Compare with signal processing apparatus shown in Figure 2, in signal processing apparatus shown in Figure 6, signal generating unit S31 comprises output and input;
Output at every road phase shifter S23 connects a loop device S33 respectively, and the output of phase shifter S23 is connected with the first I/O end (1) of loop device S33.Correspondingly, the second I/O end (2) of each loop device S33 is as the shunting sign I/O end of device;
The 3rd I/O end (3) of each loop device S33 is connected with one 6 input that closes 1 mixer S32 respectively, and 6 close the output of the output of 1 mixer S32 as device, is connected with the input of signal generating unit S31.
Wherein, the operation principle of loop device is: the first I/O end is a forward path to the second I/O end, and the decay of signal is very little.The first I/O end to the, three I/O ends are backward channels, and the decay of signal is very big.In like manner, the second I/O end to the, three I/O ends are forward paths, and the second I/O end is backward channel to the first I/O end; The 3rd I/O end is a forward path to the first I/O end, and the 3rd I/O end is backward channel to the second I/O end.
Upward signal can output to antenna connector S13 from the second I/O end of loop device S33 and go up corresponding antenna, and the upward signal of revealing from the 3rd I/O end is very low, can ignore.Downstream signal behind the process figuration that every antenna of smart antenna sends, enter from the second I/O end of each road loop device, and output to 6 from the 3rd I/O end and close 1 mixer S32, and the downstream signal of revealing from the first I/O end is very low, can ignore.
As can be seen, adopting the purpose of loop device is that the uplink and downlink signal is isolated, the signal attenuation value of backward channel, can be used a plurality of loop device series connection if wish to guarantee the more isolation of the degree of depth of uplink and downlink signal by the isolation index decision of loop device S33.
6 close 1 mixer S32 closes the road with 6 road downlink forming signals that smart antenna sends, the stack of No. 6 antennas that are equivalent to eat dishes without rice or wine, and signal generating unit S33 can receive the figuration signal that closes behind the road by radio frequency cable.
In signal processing apparatus shown in Figure 6, signal generating unit S31 comprises output and input, but in actual applications, signal generating unit often has only an input/output end port, not only can send upward signal but also can receive downstream signal by this port signal generating unit.
When signal generating unit had only an input/output end port, signal processing apparatus should be as shown in Figure 7.
Compare with signal processing apparatus shown in Figure 6, in signal processing apparatus shown in Figure 7, increased a loop device S33, the first I/O end of this loop device S33 is connected with the I/O end of signal generating unit S41 as closing road signal I/O end; The second I/O end of this loop device S33 is connected with the input of 1 minute 6 splitter, and the 3rd I/O end is connected with 1 output that closes 6 mixers.
The upward signal that signal generating unit S41 sends outputs to 1 minute 6 splitter from the first I/O end input of loop device S33 by the second I/O end; 1 closes downlink forming signal that 6 mixers send smart antenna closes the 3rd I/O end that is input to loop device S33 behind the road, outputs to signal generating unit S41 by the first I/O end.
Carry out because signal generating unit S41 sends and received signal staggers in time, therefore, when adopting signal processing apparatus shown in Figure 7 to carry out the smart antenna test, can go up from the time fully the uplink and downlink signal is staggered, avoid issuable interference between the uplink and downlink signal effectively.
The present invention also proposes a kind of signal processing apparatus, as shown in Figure 8.
Compare with signal processing apparatus shown in Figure 6, in signal processing apparatus shown in Figure 8, every road loop device S33 and 6 closes the loop device S33 that connected again between the 1 mixer S32, the 3rd I/O end of two loop devices is connected, and the first I/O end and 6 of the loop device S33 of described series connection closes 1 mixer S32 and is connected;
Close the 1 fen 2 splitter S42 that also connect between the 1 mixer S32 at signal generating unit S41 and 1 minute 6 splitter S21,6, the input of 1 minute 2 splitter S42 is connected with the I/O end of signal generating unit S41 as the input of signal processing apparatus S14; The input and 6 that two outputs of 1 minute 2 splitter S42 connect 1 minute 6 splitter S21 respectively closes the output of 1 mixer S32.
When signal generating unit S41 sent up radiofrequency signal, radiofrequency signal was divided into two-way through 1 minute 2 splitter S42, and one the tunnel enters 1 minute 6 splitter S21, and one the tunnel enters 6 closes 1 mixer S32.Enter the first I/O end that 6 upward signals that close 1 mixer S32 can arrive the loop device S33 of described series connection, because the first I/O end to the, the three I/O ends of loop device S33 are backward channel, therefore the 3rd I/O end group at loop device S33 does not originally have upward signal to leak.
And the 3rd I/O end is a forward path to the first I/O end, so downstream signal can be by the loop device S33 of described series connection.Close the downstream signal that 1 mixer S32 closes behind the road through 6 and can be sent to signal generating unit S41 through 1 minute 2 splitter S42.
Carry out because signal generating unit S41 sends and received signal staggers in time, therefore, when adopting signal processing apparatus shown in Figure 8 to carry out the smart antenna test, can go up from the time fully the uplink and downlink signal is staggered, avoid issuable interference between the uplink and downlink signal effectively.
By above-mentioned disclosed embodiment, can make those skilled in the art can realize or use the present invention.To those skilled in the art, the various modifications of these embodiment are conspicuous, and the general principles of definition here also can be applied to other embodiment on the basis that does not depart from the scope of the present invention with purport.Above-described embodiment only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1, a kind of signal processing apparatus, it is characterized in that, comprise a splitter, the input of described splitter receives upward signal, each output at described splitter is in series with adjustable attenuator and phase shifter successively, each the road upward signal after each phase shifter output is handled.
2, signal processing apparatus as claimed in claim 1, it is characterized in that, output at every road phase shifter also is connected with the loop device respectively, the output of phase shifter is connected with the first I/O end of loop device, signal after the second I/O end output of each loop device is handled, and receive each road downstream signal;
The 3rd I/O end of each loop device is connected with the input of a mixer respectively, and the downstream signal behind the road is closed in described mixer output.
3, signal processing apparatus as claimed in claim 2, it is characterized in that, also comprise a loop device, the first I/O termination of this loop device is received upward signal, output downstream signal, the second I/O end is connected with the input of described splitter, and the 3rd I/O end is connected with the output of described mixer.
4, signal processing apparatus as claimed in claim 2, it is characterized in that, also comprise 1 fen 2 splitter, the input of described 1 minute 2 splitter receives upward signal, output downstream signal, and two outputs of described 1 minute 2 splitter connect the input of described splitter and the output of described mixer respectively;
The loop device of also connecting respectively between the 3rd I/O end of each loop device and the described mixer, the 3rd I/O end of each loop device is connected with the 3rd I/O end of the loop device of described each series connection, and the first I/O end of the loop device of described each series connection is connected with the input of described mixer.
As any described signal processing apparatus of claim 1 to 4, it is characterized in that 5, the shunt quantity of described splitter and the antenna amount of smart antenna equate.
6, a kind of intelligent antenna test system, comprise a signal generating unit and antenna connector, it is characterized in that, also comprise a signal processing apparatus, this device comprises a splitter, the input of described splitter is connected with the output of described signal generating unit, is in series with adjustable attenuator and phase shifter successively at each output of described splitter, and the output of each phase shifter is connected with each the corresponding interface of described antenna connector respectively.
7, intelligent antenna test system as claimed in claim 6 is characterized in that, also is connected with the loop device respectively at the output of each phase shifter, and described signal generating unit also comprises input;
The output of phase shifter is connected with the first I/O end of loop device, and the second I/O end of each loop device is connected with each the corresponding interface of described antenna connector respectively;
The 3rd I/O end of each loop device is connected with the input of a mixer respectively, and the output of described mixer is connected with the input of described signal generating unit.
8, intelligent antenna test system as claimed in claim 7, it is characterized in that, when the output of described signal generating unit with when being input as same port, also comprise a loop device, the first I/O end of this loop device is connected with the I/O end of described signal generating unit, the second I/O end is connected with the input of described splitter, and the 3rd I/O end is connected with the output of described mixer.
9, intelligent antenna test system as claimed in claim 7, it is characterized in that, when the output of described signal generating unit with when being input as same port, also comprise 1 fen 2 splitter, the input of described 1 minute 2 splitter is connected with the I/O end of described signal generating unit, and two outputs of described 1 minute 2 splitter connect the input of described splitter and the output of described mixer respectively;
The loop device of also connecting respectively between the 3rd I/O end of each loop device and the described mixer, the 3rd I/O end of each loop device is connected with the 3rd I/O end of the loop device of described each series connection, and the first I/O end of the loop device of described each series connection is connected with the input of described mixer.
As any described intelligent antenna test system of claim 6 to 9, it is characterized in that 10, the shunt quantity of described splitter and the antenna amount of smart antenna equate.
11, a kind of signal processing method is characterized in that, comprising:
By wired reception upward signal;
Described upward signal is carried out shunt by the antenna number of smart antenna;
Press the amplitude and the phase place of the every road upward signal after the preset value adjustment along separate routes;
With adjusted each road upward signal by wired smart antenna that sends to.
12, signal processing method as claimed in claim 11 is characterized in that, further comprises:
Multichannel downstream signal by wired reception smart antenna transmission;
Described multichannel downstream signal is closed the road, close downstream signal behind the road by wired transmission.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931446A (en) * | 2009-06-25 | 2010-12-29 | 中兴通讯股份有限公司 | Inter-cell interference suppression method and base station |
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