CN101106787A - Base station RF index testing system and method, and RF box for TD-SCDMA system - Google Patents
Base station RF index testing system and method, and RF box for TD-SCDMA system Download PDFInfo
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- CN101106787A CN101106787A CNA2006100896880A CN200610089688A CN101106787A CN 101106787 A CN101106787 A CN 101106787A CN A2006100896880 A CNA2006100896880 A CN A2006100896880A CN 200610089688 A CN200610089688 A CN 200610089688A CN 101106787 A CN101106787 A CN 101106787A
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Abstract
The invention discloses a radiofrequency case suitable for testing base station radiofrequency index of a TD-SCDMA system, and a base station testing system and a method using the radiofrequency case. The radiofrequency case includes a radiofrequency switch, an attenuator, a mixer, an isolator, a circulator and a power divider. Signals from signal sources are inputted into the mixer via a radiofrequency signal inlet on the radiofrequency case and one path of the signal is performed attenuation treatment via the attenuator before it is inputted into the mixer; the radiofrequency signals treated by the mixer is inputted into a common port of the radiofrequency switch via the isolator and the circulator, and then is inputted into the base station via a switch connected with the common port; and meanwhile, the circulator receives downlink signals from the radiofrequency switch and isolates the uplink signals from the downlink signals, then the radiofrequency signals are multiplexed by the power divider and is outputted to a frequency spectrograph for performing radiofrequency index testing. The invention also discloses the base station testing system and the method based on the radiofrequency case. The invention has high automation degree and can achieve correct testing results.
Description
Technical field
The present invention relates to a kind of radio frequency case that is particularly useful for the base station testing of TDS-CDMA system, used the base station testing system and the method for this radio frequency case.
Background technology
In recent years, 3G (Third Generation) Moblie is the focus that people pay close attention to always, and the 3G (Third Generation) Moblie standard is through constantly merging, three big mainstream standard have been formed gradually, WCDMA (the Wideband Code Division Multiple Access of i.e. Europe proposition, Wideband Code Division Multiple Access (WCDMA)), the TD-SCDMA (Time Division-CodeDivision Multiple Access, Time Division-Synchronous Code Division Multiple Access) of the CDMA2000 of U.S.'s proposition and China's proposition.And the TD-SCDMA system is as TDD (Time Division Duplex, time division duplex) pattern technology, than FDD (FrequencyDivision Duplex, Frequency Division Duplexing (FDD)) more is applicable to the asymmetric service environment of up-downgoing, be multi-slot TDMA (Time Division Multiple Access, time division multiple access) with the straight synthetic new technology of CDMA (Code Division Multiple Access, code division multiple access) technology that expands.Simultaneously, the air interface technologies that the TD-SCDMA standard recommendation is adopted is as one of the most advanced transmission technology of current industry, by with the fusion of technology such as intelligent antenna technology, synchronization CDMA technology and software and radio technique, it is the highest to have formed present frequency spectrum utilization rate, the third generation radio network technique that cost is minimum.Can predict, the TD-SCDMA system will substitute the 2G system comprehensively, becomes the main flow of following radio communication.
In the TD-SCDMA system networking process, its base station testing will be one of main work.Base station testing comprises testing protocol consistency and radio-frequency (RF) index uniformity test, and wherein radio-frequency (RF) index not only influences the performance of base station self, and also the receiving and transmitting signal in its vicinity other base stations has very big influence.The test parameter of base station transmitter part comprises frequency dependence test event and power dependence test project, whether the index of frequency and power is consistent with communication industry standard, can have influence on the performance and the result of the whole system network planning, because the network planning and design assumed condition all are that carry out under the situation that satisfies such standard the base station,, this index can exert an influence if can not satisfying the requirement of national sector standard.The test of radio-frequency (RF) index is the project that must survey of equipment development side still not, also is one of approval standard of networking of base station equipment.According to the 3GPP regulation and stipulation, the test of the radio-frequency (RF) index of tdd mode base station comprises the content of three parts, is respectively transmitter characteristic, receiver identity and demodulation characteristic test, totally 24 test events.Distribute high, medium and low three frequencies and all radio frequency paths in the frequency range and need cover during actual test.
Radio-frequency (RF) index test for the TD-SCDMA system base-station at present has three kinds of implementations, is described below:
1, manual test.Build different test environments according to different test events, use from the testing software transmission simulation message of grinding to make the base station build operations such as sub-district, link connection, again each test instrumentation is provided with, read and logging test results, fill in test log.Need cover three frequencies and all radio frequency paths for the test that requires in the standard, the tester need repeat above action.When adopting the manual test mode to test the cycle longer, to having relatively high expectations of tester, test subjective, test result and tester's professional technique ability and working attitude are closely bound up.Be unfavorable for the checking property testing and the production test of product.Therefore, this test mode has significant limitation.
2, semi-automatic test method.As shown in Figure 1, control PC is connected in base station system (at least one base station) to control its reception and to send radiofrequency signal by ICP/IP protocol; Signal source inputs to base station system by power splitter, circulator with upward signal, is connected by radio frequency cable A between circulator and the base station system, and it is mutual to be used to finish signal, and circulator is simultaneously to frequency spectrograph output test signal.Control PC is connected to signal source and frequency spectrograph by GPIB (all purpose instrument control bus).But, in the existing test mode, the radio frequency cable A of circulator and base station system only is connected a radio frequency path of base station, if cover the test of all radio frequency paths, then whenever testing a radio frequency path needs manually radio frequency cable A to be connected to other paths and test.The tester uses from the testing software transmission simulation message of grinding and makes the base station build operations such as sub-district link connection during test, after the decision operation success, restarts the radio frequency testing program and carries out radio frequency testing, and test back program can generate test report.This test mode has just realized the automatic control of instrument, satisfies being provided with of supposition base station and just can test when test event requires.If the base station is provided with the requirement of not satisfying test event, the tester must reset the base station and test, can not realize automation truly.
The semi-automatic test method also has other forms, and as shown in Figure 2, compared to Figure 1, the test macro of Fig. 2 adopts radio-frequency (RF) switch to replace circulator.Radio-frequency (RF) switch is connected by one group of radio frequency line A with base station system.Can between different paths, switch by control PC control radio-frequency (RF) switch during test.The tester uses earlier from the testing software transmission simulation message of grinding and makes the base station build operations such as sub-district link connection, after the decision operation success, restarts the radio frequency testing program and carries out radio frequency testing.Control PC provided corresponding conclusion after test was finished.This mode can realize the automatic test of the whole radio-frequency (RF) index of transmitter characteristic, but can not realize the automatic test of receiver identity and demodulation characteristics.The test event relevant with power control utilizes the mode of inside of base station bus adjustment PGC (gain controlling register) to realize, but these are different with the real power control implementation in base station, and there are a lot of careless mistakes in this test mode.This mode receiving feature realization of test automatically can not be accomplished automation, follow the tracks of BER (bit error rate) end value, artificially whether judged result correctly just can make program enter following flow process, and the tester must can not finish otherwise test in test site when this just required to test.
There is the limitation of human intervention in present test mode, and for the testing base station radio-frequency (RF) index, human factor is always followed a lot of subjectivity factors, causes the inaccuracy of test result.And for dissimilar base stations, testing software can not be general.
Summary of the invention
At existing problem and shortage in the radio-frequency (RF) index test of above-mentioned existing TD-SCDMA system base-station, the purpose of this invention is to provide a kind of automaticity height, accurate, simple general TD-SCDMA system base station radio-frequency index testing system and the method for realization of measurement result.
The present invention is achieved in that the test macro of the base station radio-frequency index of a kind of TD-SCDMA of being applicable to system, communication protocol simulator and radio frequency case that this system comprises base station to be measured, is used to control the channel simulator of the control PC of described base station to be measured and system, signal source, frequency spectrograph, analog communication channel circumstance, simulates processing protocol between described base station to be measured and the radio network controller, described signal source, frequency spectrograph and channel simulator are connected in described control PC and receive the control command of this control PC; Described communication protocol simulator is connected between described base station to be measured and the described control PC, and the control command that this communication protocol simulator receives described control PC to be finishing the Iub mouth protocol procedures of initiating appointment, and described base station to be measured is set; Described radio frequency case is connected in described base station to be measured by its radio-frequency channel interface, described signal source, frequency spectrograph and channel simulator are connected in the radio frequency access port of described radio frequency case, described radio frequency case is connected in described control PC simultaneously, and the control command that receives this control PC is to finish the switching between tested radio-frequency channel, the control of measuring passage.
Further, described radio frequency case includes prevention at radio-frequency port that is connected with tested base station and the radio frequency interface that is connected with tester; The radio-frequency channel interface that the radio-frequency (RF) switch that is used for switch test path and base station radio-frequency path to be measured, this radio-frequency (RF) switch are provided with the radiofrequency signal input/output port and are connected with the base station; Be used for the upward signal decay to satisfy the attenuator of measurement requirement; Be used for the upward signal that the unlike signal source sends is closed the mixer on road; The isolator of isolating downstream signal; Be used for uplink and downlink signals is isolated the circulator of output; Be used for input signal is carried out multiplexing power divider; More than one signal source inputs to described mixer by the radiofrequency signal access port on the radio frequency case, wherein at least one road signal carries out attenuation processing through described attenuator before importing described mixer, the radiofrequency signal of closing after handle on the road through described mixer inputs to the radio frequency access port of described radio-frequency (RF) switch by described isolator, circulator, and inputs to base station side by the radio frequency case with the prevention at radio-frequency port that tested base station is connected; Described circulator receives the downstream signal of described radio-frequency (RF) switch simultaneously, and uplink and downlink signals is isolated, and is through described power divider that radiofrequency signal is multiplexing again, exports to through described radio-frequency (RF) switch then and carries out the radio-frequency (RF) index test in the frequency spectrograph.
Further, be connected with the time-domain filtering unit on the circuit of described radio-frequency (RF) switch, this time-domain filtering unit is connected in external timing signal, to filter out the radiofrequency signal of base station side transmission time slot, and the radiofrequency signal of receiving slot inputed to described radio-frequency (RF) switch, to carry out the switch power test.
Further, be connected with low noise amplifier on the circuit of described time-domain filtering unit and described radio-frequency (RF) switch, under the situation that does not increase additional noise the base station side output signal is carried out power amplification, the signal after the power amplification exports described radio-frequency (RF) switch to.
Further, described signal source, radio frequency case, channel simulator and frequency spectrograph specifically are connected in described control PC by all purpose instrument control bus; Be connected by E1 interface or light mouth between described communication protocol simulator and the described base station to be measured; Be connected based on ICP/IP protocol between described control PC and the described communication protocol simulator.
A kind of method of testing that is applicable to the base station radio-frequency index of TD-SCDMA system may further comprise the steps:
1) loss of the radio frequency cable between the loss of each path, radio frequency case and tested base station and the test instrumentation in the calibrate radio frequency case, and be kept in the configuration file of testing software among the control PC;
Selecting in the menu of testing software when 2) testing needs test items, and the testing time of each test event is set;
3) control PC is according to the test event of user's selection, call the content in corresponding test case file and the read test use-case file, control communication protocol simulator, test instrumentation and radio frequency case according to the test case content, and testing time repeats to finish the test of corresponding index.
Further, described step 3) specifically may further comprise the steps:
A, based on test case, the protocol signaling that the communication protocol simulator sends the Iub mouth is configured base station to be measured;
B, control test instrumentation are measured, are read measurement data and preserve;
C, control radio frequency case switch between tested radio frequency path and measurement path, travel through all tested paths.
A kind of radio frequency case that is applicable to the base station radio-frequency index test of TD-SCDMA system includes prevention at radio-frequency port that is connected with tested base station and the radio frequency interface that is connected with tester; The radio-frequency channel interface that the radio-frequency (RF) switch that is used for switch test path and base station radio-frequency path to be measured, this radio-frequency (RF) switch are provided with the radiofrequency signal input/output port and are connected with the base station; Be used for the upward signal decay to satisfy the attenuator of measurement requirement; Be used for the upward signal that the unlike signal source sends is closed the mixer on road; The isolator of isolating downstream signal; Be used for uplink and downlink signals is isolated the circulator of output; Be used for input signal is carried out multiplexing power divider; More than one signal source inputs to described mixer by the radiofrequency signal access port on the radio frequency case, wherein at least one road signal carries out attenuation processing through described attenuator before importing described mixer, the radiofrequency signal of closing after handle on the road through described mixer inputs to the radio frequency access port of described radio-frequency (RF) switch by described isolator, circulator, and inputs to base station side by the radio frequency case with the prevention at radio-frequency port that tested base station is connected; Described circulator receives the downstream signal of described radio-frequency (RF) switch simultaneously, and uplink and downlink signals is isolated, and is through described power divider that radiofrequency signal is multiplexing again, exports to through described radio-frequency (RF) switch then and carries out the radio-frequency (RF) index test in the frequency spectrograph.
Further, be connected with the time-domain filtering unit on the circuit of described radio-frequency (RF) switch, this time-domain filtering unit is connected in external timing signal, to filter out the radiofrequency signal of base station side transmission time slot, and the radiofrequency signal of receiving slot inputed to described radio-frequency (RF) switch, to carry out the switch power test.
Further, be connected with low noise amplifier on the circuit of described time-domain filtering unit and described radio-frequency (RF) switch, under the situation that does not increase additional noise the base station side output signal is carried out power amplification, the signal after the power amplification exports described radio-frequency (RF) switch to.
Further, described radio-frequency (RF) switch, attenuator are connected in the external control bus, to finish described radio-frequency (RF) switch the flexible control to the decay intensity of signal of the selection of path and described attenuator is selected, measured in tested radio-frequency channel.
Further, described power divider is specially the active type power divider, to guarantee multiplexed signals intensity.
The present invention utilizes the communication protocol simulator base station to be set to the state that test event needs by sending the order of Iub message, tests the record measurement result by the total line traffic control test instrumentation of GIPB.Switch between each tested radio frequency path by gpib bus control radio frequency case, travel through the test of all paths.EOT is handled the test data of preserving, and generates test report.When using the radio frequency case to realize test, the present invention between the tested path and measure switching between the path, make test can travel through all radio frequency paths of tested base station.The present invention is provided with tested base station by Iub interface, no longer is subjected to the restriction of base station type and manufacturer, is a general TD-SCDMA base station radio-frequency index automatic test system.The present invention has realized the full automation of test process, comprises the setting to the base station, obtains the response of base station, and analyzing responding carries out radio frequency testing and obtains measurement result, and generation test report etc. all need not manual intervention, all finishes automatically.And, the accuracy and the testing efficiency of test have been improved to the new method of testing of indivedual test events employings.
Description of drawings
Fig. 1 is an existing base station semi-automatic test system configuration schematic diagram;
Fig. 2 is another structural representation of existing base station semi-automatic test system;
Fig. 3 is the structural representation of radio frequency case of the present invention;
Fig. 4 is the TDD base station testing system structural representation that the present invention is based on the radio frequency case;
Fig. 5 is the TDD base station testing flow chart that the present invention is based on the radio frequency case;
Fig. 6 is the test flow chart of bit error rate in the base station testing of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 3, radio frequency case of the present invention mainly comprises and is used for tested radio frequency path switching and measures the radio-frequency (RF) switch that path switches, the radio-frequency channel interface (C1-C8) that this radio-frequency (RF) switch is provided with radiofrequency signal input/output port (A, C mouth), testing radio frequency signaling switch interface (a1, a2) and is connected with the base station; Be used for the upward signal decay to satisfy the programmable attenuator of measurement requirement; Be used for the upward signal that unlike signal source (SG1, SG2, SG3) sends is closed the mixer on road; The isolator of isolating downstream signal; Be used for uplink and downlink signals is isolated the circulator of output; Be used for input signal is carried out multiplexing power divider (abbreviation power splitter); More than one outside source (SG1, SG2, SG3) inputs to mixer by the inlet of the radiofrequency signal on the radio frequency case, wherein carry out attenuation processing through attenuator before the signal of the SG1 information source input mixer, the radiofrequency signal of closing after handle on the road through mixer inputs to the radio frequency interface (C mouth) of radio-frequency (RF) switch through isolator, circulator, and inputs to base station side by the radio-frequency channel interface of radio-frequency (RF) switch; Circulator exports the downstream signal that the base station that receives is sent to radio-frequency (RF) switch to power splitter, through power divider that radiofrequency signal is multiplexing, a1, a2 mouth input to radio-frequency (RF) switch on radio-frequency (RF) switch then, and be sent to frequency spectrograph (SA) by the radio-frequency (RF) output end mouth A of radio-frequency (RF) switch, carry out the radio-frequency (RF) index test.Radio frequency case of the present invention is integrated program control radio-frequency (RF) switch, programmable attenuator, circulator, power splitter, devices such as amplifier have been realized automatic switchover between the tested radio frequency path, the automatic decay of signal and the functions such as switching of test access by program control.
Radio frequency case of the present invention is provided with all purpose instrument control bus interface, and radio-frequency (RF) switch and programmable attenuator are connected in all purpose instrument control bus, and to receive the control of peripheral control unit, radio-frequency (RF) switch is finished tested radio frequency path selection, test access is selected control; Play in test promptly that (switch between the C1～C8), the folding of control testing radio frequency signaling switch a1 and a2 is to finish the test of respective radio-frequency index at each radio frequency path.When switch power is tested, insert the signal of signal for inserting of frequency spectrograph when making the switch power test by a1, the signal that inserts frequency spectrograph when other radio-frequency (RF) index tests is the signal that inserts by a2.Programmable attenuator is finished the flexible control to the decay intensity of signal.Programmable attenuator uses when the test demodulation characteristics, and by the value of program control regulated attenuator, the system that makes can test under the situation of different signal to noise ratios.Circulator is isolated uplink and downlink signals, improves test accuracy, the guard signal source.Isolator mainly is to isolate downstream signal, guard signal source.Mixer closes the signal of SG1, SG2 and SG3 input behind the road in the input base station.
Be connected with time-domain filtering unit TSB, low noise amplifier LNA in the radio frequency case of the present invention on the circuit of power splitter and switch interface a1 in turn, this time-domain filtering unit TSB is connected in base station (CLOCK port, with reach with base station transceiver synchronously) clock signal (cycle is 5ms, consistent with TD-SCDMA system period of sub-frame), filtering out the radiofrequency signal of base station side transmission time slot, and the radiofrequency signal of receiving slot is inputed in the radio-frequency (RF) switch.Low noise amplifier LNA amplifies the base station side radiofrequency signal and does not increase signal noise, export the switch interface a1 of radio-frequency (RF) switch again to, make and to be input to measured signal dynamic range in the frequency spectrograph in the test dynamic range of frequency spectrograph, and the power of input signal is higher than the background noise of frequency spectrograph, to improve the accuracy of test.Power splitter is multiplexed into two-way with the descending measured signal of base station, leads up to insert switch interface a1 behind time-domain filtering unit TSB and the low noise amplifier LNA, carries out the switch power test; Switch interface a2 is directly inserted on another road, carries out other transmitter characteristic tests.
Power splitter in the radio frequency case of the present invention preferably adopts the active type power splitter, to guarantee multiplexed signals intensity.Certainly, if use passive power splitter, also can realize goal of the invention.
As shown in Figure 4, the base station testing system that the present invention is based on aforementioned radio frequency case comprises the communication protocol simulator of processing protocol between base station node B to be measured, simulation base station to be measured and the radio network controller, is used for the channel simulator of control PC, testing source (SG1, SG2, SG3), the aforementioned radio frequency case of frequency spectrograph and the analog communication channel circumstance of base station to be measured and system's control, the communication protocol simulator is connected in base station to be measured, finishes Signalling exchange with base station to be measured; Signal source, radio frequency case, frequency spectrograph and channel simulator are connected in control PC by all purpose instrument control bus and receive the control command of this control PC; The communication protocol simulator is connected in control PC by TCP/IP; The radio frequency case is connected in the antenna opening (ANT1-ANT8) of base station to be measured by its radio-frequency channel interface (C1-C8), signal source, frequency spectrograph and channel simulator are connected in the radio frequency interface of radio frequency case, and the radio frequency case receives the control command of this control PC to finish switching, the measurement path switching controls between tested radio frequency path.
The control PC of base station radio-frequency index testing system of the present invention is by gpib interface control test instrumentation and radio frequency case, by TCP/IP control communication protocol simulator.The communication protocol simulator is the partial function of simulation RNC, sends the control signaling of Iub mouth, and obtains the response message of base station.Testing system software can be analyzed the message of acquisition among the control PC, and the situation that decision operation is finished is done next step and handled, because the uniformity of Iub mouth agreement makes three must system can not be subjected to the restriction of base station type and producer, reaches the versatility of test macro.
As shown in Figure 5, base station test method of the present invention comprises step: at first loss calibration (having carried out when the producing) value with each path in the radio frequency case is kept in the configuration file of the testing software of installing among the control PC; The loss of the radio frequency cable between calibrate radio frequency case and tested base station and the test instrumentation writes after the calibration in the configuration interface that testing software provides equally;
Selecting in the menu of testing software during test needs test items, can select one or more test events, and the testing time of each test event can be set;
Make corresponding test case file and preservation at each test index, call the test case file among the control PC during test as required; Control PC resolves test case file, if resolve each test instruction of successfully then carrying out in this document, test instructions all in this document are finished, and export corresponding test result; Search whether unenforced test case file is arranged, then continue to call remaining test case file if having, otherwise step finishes.Since independent fully between the test case file, so select order in no particular order, after finishing, test provides test report.
The present invention utilizes the communication protocol simulator base station to be set to the state that test event needs by the signaling that sends the Iub mouth, tests the record measurement result by the total line traffic control test instrumentation of GIPB.Switch between each tested radio frequency path by gpib bus control radio frequency case, travel through the test of all paths.EOT is handled the test data of preserving, and generates test report.When using the radio frequency case to realize test, the present invention between the tested path and measure switching between the path, make test can travel through all radio frequency paths of tested base station.The present invention is provided with tested base station by Iub interface, no longer is subjected to the restriction of base station type and manufacturer, is a general TD-SCDMA base station radio-frequency index automatic test system.
As shown in Figure 6, bit error rate statistical method of the present invention comprises: after simulator is built the sub-district success, the controlled transmission upward signal of signal source, simulator is provided with high specific than data block, and initialization errored bit statistical counter, to the Frame that receives, call original data and carry out the errored bit verification, and the statistics bit error rate.Utilize communication protocol simulator of the present invention when receiving feature and demodulation characteristic test, to gather FP (Framing Protocol) Frame of Iub mouth, obtain bit stream, obtain BER result by the bit comparison with initial data through decoding processing.Perhaps the CRCI (cyclic redundancy check (CRC) Indicator) of each data block is differentiated in decoding, the erroneous block number calculating BLER result who adds up total piece number of receiving and receive.Because BER/BLER is a statistic, so provide final result after a considerable amount of FP Frames can being followed the tracks of in the program.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those skilled in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (12)
1. test macro that is applicable to the base station radio-frequency index of TD-SCDMA system, this system comprises base station to be measured, is used to control the channel simulator of the control PC of described base station to be measured and system, signal source, frequency spectrograph and analog communication channel circumstance, and described signal source, frequency spectrograph and channel simulator are connected in described control PC and receive the control command of this control PC; It is characterized in that this system also comprises communication protocol simulator, the radio frequency case of processing protocol between described base station to be measured of simulation and the radio network controller; Described communication protocol simulator is connected between described base station to be measured and the described control PC, and the control command that this communication protocol simulator receives described control PC to be finishing the Iub mouth protocol procedures of initiating appointment, and described base station to be measured is set; Described radio frequency case is connected in described base station to be measured by its radio-frequency channel interface, described signal source, frequency spectrograph and channel simulator are connected in the radio frequency access port of described radio frequency case, described radio frequency case is connected in described control PC simultaneously, and the control command that receives this control PC is to finish the switching between tested radio-frequency channel, the control of measuring passage.
2. the test macro that is applicable to the base station radio-frequency index of TD-SCDMA system according to claim 1 is characterized in that, described radio frequency case includes prevention at radio-frequency port that is connected with tested base station and the radio frequency interface that is connected with tester; The radio-frequency channel interface that the radio-frequency (RF) switch that is used for switch test path and base station radio-frequency path to be measured, this radio-frequency (RF) switch are provided with the radiofrequency signal input/output port and are connected with the base station; Be used for the upward signal decay to satisfy the attenuator of measurement requirement; Be used for the upward signal that the unlike signal source sends is closed the mixer on road; The isolator of isolating downstream signal; Be used for uplink and downlink signals is isolated the circulator of output; Be used for input signal is carried out multiplexing power divider; More than one signal source inputs to described mixer by the radiofrequency signal access port on the radio frequency case, wherein at least one road signal carries out attenuation processing through described attenuator before importing described mixer, the radiofrequency signal of closing after handle on the road through described mixer inputs to the radio frequency access port of described radio-frequency (RF) switch by described isolator, circulator, and inputs to base station side by the radio frequency case with the prevention at radio-frequency port that tested base station is connected; Described circulator receives the downstream signal of described radio-frequency (RF) switch simultaneously, and uplink and downlink signals is isolated, and is through described power divider that radiofrequency signal is multiplexing again, exports to through described radio-frequency (RF) switch then and carries out the radio-frequency (RF) index test in the frequency spectrograph.
3. the test macro that is applicable to the base station radio-frequency index of TD-SCDMA system according to claim 2, it is characterized in that, be connected with the time-domain filtering unit on the circuit of described radio-frequency (RF) switch, this time-domain filtering unit is connected in external timing signal, to filter out the radiofrequency signal of base station side transmission time slot, and the radiofrequency signal of receiving slot inputed to described radio-frequency (RF) switch, to carry out the switch power test.
4. the test macro that is applicable to the base station radio-frequency index of TD-SCDMA system according to claim 3, it is characterized in that, be connected with low noise amplifier on the circuit of described time-domain filtering unit and described radio-frequency (RF) switch, under the situation that does not increase additional noise the base station side output signal is carried out power amplification, the signal after the power amplification exports described radio-frequency (RF) switch to.
5. the test macro that is applicable to the base station radio-frequency index of TD-SCDMA system according to claim 1 is characterized in that, described signal source, radio frequency case, channel simulator and frequency spectrograph specifically are connected in described control PC by all purpose instrument control bus; Be connected by E1 interface or light mouth between described communication protocol simulator and the described base station to be measured; Be connected based on ICP/IP protocol between described control PC and the described communication protocol simulator.
6. method of testing that is applicable to the base station radio-frequency index of TD-SCDMA system is characterized in that this method may further comprise the steps:
1) loss of the radio frequency cable between the loss of each path, radio frequency case and tested base station and the test instrumentation in the calibrate radio frequency case, and be kept in the configuration file of testing software among the control PC;
Selecting in the menu of testing software when 2) testing needs test items, and the testing time of each test event is set;
3) control PC is according to the test event of user's selection, call the content in corresponding test case file and the read test use-case file, control communication protocol simulator, test instrumentation and radio frequency case according to the test case content, and testing time repeats to finish the test of corresponding index.
7. the method for testing that is applicable to the base station radio-frequency index of TD-SCDMA system according to claim 6 is characterized in that described step 3) specifically may further comprise the steps:
A, based on test case, the protocol signaling that the communication protocol simulator sends the Iub mouth is configured base station to be measured;
B, control test instrumentation are measured, are read measurement data and preserve;
C, control radio frequency case switch between tested radio frequency path and measurement path, travel through all tested paths.
8. a radio frequency case that is applicable to the base station radio-frequency index test of TD-SCDMA system is characterized in that, this radio frequency case includes prevention at radio-frequency port that is connected with tested base station and the radio frequency interface that is connected with tester; The radio-frequency channel interface that the radio-frequency (RF) switch that is used for switch test path and base station radio-frequency path to be measured, this radio-frequency (RF) switch are provided with the radiofrequency signal input/output port and are connected with the base station; Be used for the upward signal decay to satisfy the attenuator of measurement requirement; Be used for the upward signal that the unlike signal source sends is closed the mixer on road; The isolator of isolating downstream signal; Be used for uplink and downlink signals is isolated the circulator of output; Be used for input signal is carried out multiplexing power divider; More than one signal source inputs to described mixer by the radiofrequency signal access port on the radio frequency case, wherein at least one road signal carries out attenuation processing through described attenuator before importing described mixer, the radiofrequency signal of closing after handle on the road through described mixer inputs to the radio frequency access port of described radio-frequency (RF) switch by described isolator, circulator, and inputs to base station side by the radio frequency case with the prevention at radio-frequency port that tested base station is connected; Described circulator receives the downstream signal of described radio-frequency (RF) switch simultaneously, and uplink and downlink signals is isolated, and is through described power divider that radiofrequency signal is multiplexing again, exports to through described radio-frequency (RF) switch then and carries out the radio-frequency (RF) index test in the frequency spectrograph.
9. the radio frequency case that is applicable to the base station radio-frequency index test of TD-SCDMA system according to claim 8, it is characterized in that, be connected with the time-domain filtering unit on the circuit of described radio-frequency (RF) switch, this time-domain filtering unit is connected in external timing signal, to filter out the radiofrequency signal of base station side transmission time slot, and the radiofrequency signal of receiving slot inputed to described radio-frequency (RF) switch, to carry out the switch power test.
10. the radio frequency case that is applicable to the base station radio-frequency index test of TD-SCDMA system according to claim 9, it is characterized in that, be connected with low noise amplifier on the circuit of described time-domain filtering unit and described radio-frequency (RF) switch, under the situation that does not increase additional noise the base station side output signal is carried out power amplification, the signal after the power amplification exports described radio-frequency (RF) switch to.
11. the radio frequency case that is applicable to the base station radio-frequency index test of TD-SCDMA system according to claim 8, it is characterized in that, described radio-frequency (RF) switch, attenuator are connected in the external control bus, to finish described radio-frequency (RF) switch the flexible control to the decay intensity of signal of the selection of path and described attenuator is selected, measured in tested radio-frequency channel.
12. the radio frequency case that is applicable to the base station radio-frequency index test of TD-SCDMA system according to claim 8 is characterized in that described power divider is specially the active type power divider, to guarantee multiplexed signals intensity.
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Effective date of registration: 20151026 Address after: 200233 Shanghai, Xuhui District Jiang Road, No. 41, building 333 Patentee after: Datang Mobile Communication Equipment Co., Ltd., Shanghai Patentee after: Datang Mobile Communication Equipment Co., Ltd. Address before: 100083 Haidian District, Xueyuan Road, No. 29, Patentee before: Datang Mobile Communication Equipment Co., Ltd. |