CN100594687C - Signal test system - Google Patents
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- CN100594687C CN100594687C CN200510073195A CN200510073195A CN100594687C CN 100594687 C CN100594687 C CN 100594687C CN 200510073195 A CN200510073195 A CN 200510073195A CN 200510073195 A CN200510073195 A CN 200510073195A CN 100594687 C CN100594687 C CN 100594687C
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Abstract
Through configuration of circulator and multiplexer, the signal test system can provide bidirectional wireless transmission test for accompanied test object and object to be tested. Besides bidirectional peer-to-peer measurement, the testing system picks up signal in testing path through power divider. Also, using signal analysis device carries out testing in order to reach multi analysis. Throughsignal generator, the testing system generates signals in use for accompanied test or verification in order to reach multivariated test items. In the invention, signal switch device is setup inside signal analysis device, and signal generation device. Through the signal switch device, the signal analysis device carries out analysis for signals in different frequency bands as well as generates impulse signals in different frequency bands according to need of test system.
Description
Technical field
The present invention relates to a kind of signal test system, particularly a kind ofly can and accompany the test macro of surveying multiple two-way test between thing at determinand.
Background technology
Along with the progress of wireless technology, the development of wireless product is more and more flourishing, for example wireless network card, or radio base station etc.Especially in the process of manufacturing, test often is an important ring, can have influence on the quality of the production cost and the product that dispatches from the factory.
Test at present can only provide single signal analysis device and single signal generation device, and product batches (Batch) is carried out in inconvenience, receiver disturbs immunity (Interference Immunity), receiver intermodulation distortion (Intermodulation Distortion), transmitter noise to restrain the test of (Spur Inhibition), harmonics of tranmitter inhibition (Harmonics Suppression), multistation platform (Multiple-Station) or intensive electromagnetism (DenseElectromagnetic) environment etc.The classical signal analyzer is adopted scanning (Scanned) superheterodyne receiver technology, can only support non-while (Non-simultaneous), low intercepting and capturing rate (Low Probability ofIntercept), the application of (Slow Speed) at a slow speed.And classical signal generation instrument is adopted and is swept ripple (Swept) tuner-type transmitter techniques, also can only support non-while (Non-simultaneous), low-density signal emulation, the application of (Slow Speed) at a slow speed.Therefore the present invention's signal analysis device or signal generation device that a kind of signal switching device can be provided and use this signal switching device carries out the parallel signal analysis during in order to test or parallel signal produces.
Summary of the invention
Main purpose of the present invention provides the test environment of the multiple two-way test of wireless product.In order to achieve the above object, the invention provides a kind of signal test system, can test at least one determinand, and signal test system can external at least one accompanying be surveyed thing so that determinand is tested, this system is mainly by first multiplexer, first circulator, first channel simulator, second circulator, second multiplexer, and the second channel simulator is formed.
Wherein, first circulator connects accompanies the survey thing, accompanies the test signal of surveying thing output with reception.Second circulator connects determinand, to receive the test signal of determinand output.First channel simulator receives the signal of first circulator output, and the emulation first wireless transmission environment.First power divider receives the signal of first channel simulator output, to carry out power division, transfers to second circulator again.The second channel simulator receives the signal of second circulator output, and the emulation second wireless transmission environment.Second power divider receives the signal of second channel simulator output, to carry out power division, transfers to first circulator again.First duplexer receives the signal of first and second power divider output respectively.Signal analysis device then receives the signal of first duplexer output, analyzes the signal of first duplexer output again.
Wherein, first circulator receives the signal of first power divider output, accompanies with generation and surveys the signal that thing receives, and second circulator receives the signal of second power divider output, to produce the signal that determinand receives.In preferred embodiment of the present invention, test macro also comprises first, second multiplexer.Wherein, the first multiplexer selectivity receives a plurality of signals of surveying thing output of accompanying, and to receive a plurality of signals of surveying thing output of accompanying in conjunction with selectivity, produces the signal that first circulator receives.Second multiplexer then selectivity receives the signal that a plurality of determinands are exported, and to receive the signal of a plurality of determinands outputs in conjunction with selectivity, produces the signal that first circulator receives.
Wherein, first multiplexer receives the signal of first circulator output, produce a plurality of accompanying with the signal that separates the output of first circulator and survey the signal that thing receives, second multiplexer receives the signal of second circulator output, produces the signal that a plurality of determinands receive with the signal that separates the output of second circulator.In preferred embodiment of the present invention, signal analysis device includes amplifier, signal receiving unit, signal switching device, and signal analysis unit.Wherein, amplifier connects duplexer, to amplify the signal of first duplexer output.Signal receiving unit connects amplifier, to carry out the signal of power division, filtering and switching amplifier output.Signal switching device connects signal receiving unit, to carry out power division, to select the signal of conducting and the synthetic a plurality of signal receiving unit outputs of power to produce a plurality of composite signals.Signal analysis unit then receives and analyzes these composite signals.
In preferred embodiment of the present invention, also can produce pulse signal by signal generation device, and connect signal generation device by second duplexer, survey signal that thing exported or the signal of selecting output pulse signal to the second multiplexer to export to select output pulse signal to the first multiplexer as accompanying as determinand.
Wherein, signal generation device includes signal generation unit, signal switching device, signal transmission unit, and amplifier.This signal switching device connects the signal of a plurality of signal generation unit outputs, with the signal that carries out power division, selects conducting and the synthetic a plurality of signal generation units of power to export.Signal transmission unit receives the signal of a plurality of signal switching devices output, with change, filtering and power is synthetic.Amplifier is the signal of received signal transmission unit output then, with the signal generation pulse signal of amplifying signal transmission unit output.
Above-mentioned signal switching device then is made up of a plurality of power dividers, a plurality of switch element, a plurality of power combiner.Wherein, a plurality of power dividers are a plurality of signals of received signal generation unit output one to one, to carry out a plurality of signals of power division signal generation unit output.Each connects a plurality of power dividers a plurality of switch elements, and it receives the signal of a plurality of power divider outputs, to select the signal of a plurality of power divider outputs of conducting according to control signal.A plurality of power combiners then connect switch element one to one, and the signal of exporting with the power divider of synthetic a plurality of selection conductings produces the signal of a plurality of signal switching devices outputs.
The present invention is described in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the schematic diagram that is provided with the signal test system of preferred embodiment of the present invention;
Fig. 2 is the schematic diagram of the signal analysis device of preferred embodiment of the present invention;
Fig. 3 is the schematic diagram of the signal generation device of preferred embodiment of the present invention;
Fig. 4 is the schematic diagram of the signal switching device of preferred embodiment of the present invention.
Description of reference numerals: 10 signal test systems; 101 multiplexers; 103 multiplexers; 105 circulators; 107 circulators; 109 channel simulator; 110 signal generation devices; 111 channel simulator; 113 power dividers; 115 power dividers; 120 duplexers; 130 signal analysis devices; 140 duplexers; 151～155-determinand; 161 test signals; 171 test signals; 181～185-accompanies the survey thing; 189 pulse signals; 20 signal analysis devices; 21 amplifiers; 22 signal receiving units; 221 power dividers; 222 filters; 223 transducers; 25 signal switching devices; 26 signal analysis units; 27 detecting units; 271 power detectors; 272 analog/digital converters; 273 level measurers; 29 switching device shifters; 291 signal analyzers; 293 signal analyzers; 295 diverter switches; 201 signals; 202 signals; 245 control signals; 251～255-signal; 275 power detection consequential signals; 277 digital signals; 279 level measurement signals; 281 frequency spectrums resolve consequential signal; 30 signal generation devices; 31 signal generation units; 32 signal switching devices; 33 signal transmission units; 331 transducers; 332 filters; 333 power combiners; 35 amplifiers; 37 detecting units; 39 switching device shifters; 391 signal analyzers; 393 signal analyzers; 311～315-signal; 318 estimation results signals; 320 signals; 345 control signals; 351 signals; 371 testing result signals; 40 signal switching devices; 41 power dividers; 43 switch elements; 431 switches; 45 power combiners; 401～403-signal; 420 control signals; 451～455-signal.
Embodiment
See also the schematic diagram of the signal test system that is provided with preferred embodiment of the present invention shown in Figure 1.This signal test system 10 includes multiplexer 101,103, circulator 105,107, channel simulator 109,111, power divider 113,115, and signal analysis device 130, signal generation device 110.Wherein, accompany when surveying thing 181～185 (M altogether) for transmitting terminal (Tx), can be by test path 1 (dotted line is represented), just through multiplexer 101, circulator 105, channel simulator 109, power divider 113, circulator 107, multiplexer 103, the wireless propagation path of emulation is provided so that accompany the output signal of surveying thing 181～185 through wireless transmission path thus to determinand 151～155 (N altogether) as receiving terminal (Rx).
Perhaps, when determinand 151～155 is transmitting terminal, can be by test path 2 (dotted line is represented), promptly through multiplexer 103, circulator 107, channel simulator 111, power divider 115, circulator 105, multiplexer 101, the wireless propagation path of emulation is provided, surveys thing 181～185 so that the output signal of determinand 151～155 exports to as accompanying of receiving terminal through wireless propagation path thus.
Accompanying survey thing 181～185 under the situation of transmitting terminal, accompany and survey signal that thing 181～185 exported and can select whether to receive to it and follow-uply carry out combination by multiplexer 101, (this test signal 161 can be and respectively accompanies the binding signal of surveying thing 181～185 output signals with output test signal 161, for example can be considered the superposition of multiple signal), but having only the single survey thing 181 of accompanying to be the situation of transmitting terminal, accompany and survey the signal that thing 181 is exported, do not need directly to export next assembly to through multiplexer 101.And this test signal 161 is via the suitable clockwise channel simulator 109 that passes in circulator 105 edges.And after test signal 161 entered channel simulator 109, channel simulator 109 can provide the environment of the wireless transmission of test signal 161 emulation, and test signal 161 promptly is equivalent to via a wireless transmission environment via channel simulator 109.Usually, channel simulator 109 can be a transmission line (Transmission Line), attenuator (Attenuator), delay line (Delay Line), equalizer (Equalizer), filter (Filter), limiter (Limiter) or digital channel simulator (Digital Channel Emulator).
And test signal 161 by channel simulator 109 output after, power divider 113 can carry out it to export after power division, may be output to circulator 107 and duplexer 140 via the test signal after the power division 161.On the one hand, circulator 107 edges are clockwise with the test signal 161 suitable multiplexers 103 that pass to that received, and whether the signal after multiplexer 103 separates the test signal 161 that is received, determine to separate is exported, and multiplexer 103 will export determinand 151～155 in this output signal.On the other hand, duplexer 140 can export the test signal 161 that is received to signal analysis device 130, so that 130 pairs of institutes of signal analysis device acceptance test signal 161 carries out signal analysis.
Thus, by accompanying the formed test signal 161 of output signal of surveying thing 181～185, can pass through test path 1, reach and under the environment of emulation wireless transmission, export determinand 151～155 to, to carry out the acceptance test of 151～155 pairs of test signals 161 of determinand.Or, on test path 1, export test signal 161 to signal analysis device 130, so that test signal 161 is carried out signal analysis by power divider 113.Compare down in acceptance test and signal analysis, can test out the ability of determinand 151～155 acceptance test signals 161 really.
In like manner, at determinand 151～155 is under the situation of transmitting terminal, by test path 2, the test signal 171 that determinand 151～155 output signals are exported via multiplexer 103 backs reaches under the environment of emulation wireless transmission, export to accompany and survey thing 181～185, to carry out determinand 151～155 output tests.Or, on test path 2, export test signal 171 to signal analysis device 130, so that test signal 171 is carried out signal analysis by power divider 115.Compare down in output test and signal analysis, can test out the ability that determinand 151～155 transmits really.
In addition, the source of above-mentioned test signal 161 is except surveying the thing 181～185 for accompanying, and the source of test signal 171 is except determinand 151～155, and the source of this two test signal 161,171 also comprises signal generation device 110.The pulse signal 189 that this signal generation device 110 is exported can be selected export multiplexer 101 to or export multiplexer 103 to by duplexer 120, with respectively as the source of test signal 161,171.
And these pulse signal 189 usefulness are: accompany when surveying thing 181～185 output signals, pulse signal 189 can be used as extraneous interference signal, it adds all in accompanying survey thing 181～185 output signals, be enough to emulation and accompany the authenticity of survey thing 181～185 when signal is exported, and pulse signal 189 also can replace accompanies the output signal of surveying thing 181～185, with the source as test signal 161.When determinand 151～155 output signals, similarly, pulse signal 189 can be used as extraneous interference signal, it adds all in determinand 151～155 output signals, be enough to emulation and accompany the authenticity of survey thing 151～155 when signal is exported, and pulse signal 189 also can replace accompanies the output signal of surveying thing 151～155, with the source as test signal 171.In addition, also can utilize pulse signal 189 as accompanying the usefulness of surveying thing 181～185 and determinand 151～155 calibrations.
Please refer to the schematic diagram of the signal analysis device of preferred embodiment of the present invention shown in Figure 2.Signal analysis device 20 of the present invention is in order to analyze the high-frequency signal of a wireless network, and in this embodiment, the number of channels of this wireless network is 11, but the present invention does not limit the number of channels of wireless network.This signal analysis device 20 comprises: amplifier 21, signal receiving unit 22, signal switching device 25, signal analysis unit 26, and detecting unit 27.Amplifier 21 in order to the test signal 201 that receives this wireless network after, test signal 201 is amplified back output signal 202, in order to subsequent conditioning circuit action, amplifier 21 preferablies are a low noise amplifier.Signal receiving unit 22 includes power divider 221, a plurality of filter 222 and a plurality of transducer 223.After power divider 221 received signals 202, it carries out signal 202 to export after the power division, produces filtering signal via filter 222 again.
In an embodiment, the assumed wireless network overlaps (Overlapped) or the frequency covering scope of non-overlapping (Non-overlapped) channel is 100MHz, frequency resolution is planned to 5MHz, this output number is 100 ÷ 5=20, and can provide 20 test signals, therefore, filter 222 also is all 20 with transducer 223 numbers.Wherein, filter 222 preferablies are band pass filter, and filter 222 has the conducting frequency band of difference and adjacency (Contiguous), select for use according to the shared effective spectrum of each channel, for example second to the 5th filter 222 can be by most energy of wireless network first channel signals, the the 3rd to the 6th filter 222 can pass through most energy of wireless network second channel signals etc., and the frequency of formation inequality is to intensity histogram (Histogram), can by this this be adhered to separately the test signal of different channel is distinguished, in this embodiment, the test signal 201 that can be divided into many group (for convenience of description, can be assumed to be 3 groups) different channels.Transducer 223 will be respectively to should being provided with by filter 222, and after will reducing to intermediate-freuqncy signal, export signal switching device 25 to by the test signal 201 of transducer 223 outputs.
25 tests according to 20 pairs of test signals 201 of this signal analysis device of signal switching device are required, can to the test signal of exporting by transducer 223 201 carry out power division, switch motion, signal synthetic etc. after, with output composite signal 251～253.For instance, the number of signal switching device 25 power division, switch motion can be selected for use according to required wireless network number of channels, channel size, channel overlapping amplitude and the frequency resolution demand of test.Or for example signal switching device 25 can design the synthetic decision of its signal to the frequency band of signal analysis at signal analysis unit 26.
Whether signal switching device 25 in simple terms, after the signal of 25 pairs of signal receiving units of signal switching device, 22 outputs carries out power division, is carried out signal with control signal 245 decisions again and synthesizes by a control signal 245 its selections for switch motion of control.Accordingly, this control signal 245 also will determine the composition by signal switching device 25 composite signal of exporting 251～255.Thus, signal analysis device 20 can parse the test signal 201 of different frequency bands by signal switching device 25, to be applicable to signal analysis unit 26 it is carried out signal analysis.
Wherein, signal analysis unit 26 can be analyzed signals in different frequency bands, and control signal 245 can produce the signal of exporting with analytic signal receiving element 22 by two aspects.One, control signal 245 can be directly by signal analysis unit 26 outputs, resolve consequential signal 281 by the frequency spectrum of the signal of desire analysis and decide.Above-mentioned at test signal 201 to feedback the switch motion of (Feedback) mode control signal switching device 25, can make in signal 251～255 frequency ranges and the signal analysis unit 26 purpose that frequency spectrum (Calculated Spectrum) mates mutually of resolving of signal pond (SignalSink) pulse signal behind the demodulation codings.
Its two, detecting unit 27 is measured the filtering signal of being exported by filters 222 in the received signal receiving element 22, to produce level measurement signal 279.Above-mentioned is at the switch motions of awarding (Feed Forward) mode control signal switching device 25 before the test signal 201, can make signal 251～255 have preferably signal noise ratio (SNR) or signal interference plus noise than (SINR).
In this preferred embodiment of the present invention, detecting unit 27 is made up of power detector 271, analog/digital converter 272 and level measurer 273.After power detector 271 can detect the power of filtering signal of each filter 222 outputs, power output testing result signal 275, it is a voltage signal, convert power detection consequential signal 275 to digital signal 277 by analog/digital converter 272 again, and measure the level of digital signals 277 by level measurer 273, with output level measurement signal 279, for example in level measurer 273, preset the standard value of a reference value as level, after the reference value in comparison digital signal 277 and level measurer 273, promptly produce level measurement signal 279.
By level measurement signal 279, can learn the signal power of filter 222 each conducting frequency band, the switch motion of awarding control signal switching device 25 in the past, the purpose of mating mutually with the frequency range that reaches band pass filter and the frequency spectrum of desiring analytic signal.
In preferred embodiment of the present invention, by the signal analyzer in the switching device shifter 29 293,291 respectively received spectrum resolve consequential signal 281, level measurement signal 279 and basis signal intensity histogram and it is carried out clustering (Cluster) analyze back output, with the switching output of control its switch 295 as control signal 245.
Please refer to the schematic diagram of the signal generation device of preferred embodiment of the present invention shown in Figure 3.In this preferred embodiment of the present invention, the estimation results signal 318 (be equal to frequency spectrum and resolve consequential signal 281) that this signal generation device 30 specially itself is exported by signal generation unit 31, before carrying out, the signal of signal generation unit 31 being exported with signal switching device 32 (identical with Fig. 2 function) 311～315 awards control, so that estimate the purpose that frequency spectrum (EstimatedSpectrum) reaches mutual coupling in the frequency range of test signal 320 and the signal generation unit 31.And through detecting unit 37 detection signal transmission units 33, the signal of being exported with 32 pairs of signal generation units 31 of signal switching device 311～315 is feedback control, so that the signal transmission unit 33 last test signals of exporting 320 have noise suppression (SpurInhibition) or harmonic wave compacting (Harmonics Suppression) preferably.
Wherein, signal transmission unit 33 is made up of a plurality of transducers 331, a plurality of filter 332, power combiner 333.This transducer 331 is a modulator, conversion of signals can be become high-frequency signal, and 332 in these filters for example are band pass filters, and has the conducting frequency band of difference and adjacency respectively.Therefore, the signal of being exported by signal switching device 32, to signal be changed into high-frequency signal by transducer 331, again by the unwanted frequency band of filter 332 filterings, produce filtering signal, and each has different conducting frequency bands owing to filter, can obtain signals in different frequency bands, the more synthetic back output of signal power one signal 351 that will pass through by power combiner 333.Behind detecting unit 37 (its inner constituent components is identical with Fig. 2 detecting unit 27) filtering signal that then detection filter device 332 is exported, after promptly detecting the power of filtering signal of each filter 332 outputs by a power detector, export a power detection consequential signal, it is a voltage signal, convert this power detection consequential signal to a digital signal by an analog/digital converter again, and measure the level of this digital signal by a level measurer, to export a testing result signal 371 (being equal to level measurement signal 279), with usefulness as back coupling control to a switching device shifter.
By testing result signal 371, can learn the signal power of filter 332 each conducting frequency band, feedbacking the switch motion of control signal switching device 32, the purpose of mating mutually with the frequency spectrum of the frequency range that reaches band pass filter and desire generation signal.
In this preferred embodiment, still adopt identical switching device shifter 39 (with Fig. 2 with) award before switching and feedback control, and receive estimation results signal 318 and testing result signal 371 respectively with signal analyzer 391,393, and the basis signal intensity histogram carries out the clustering analysis and produces 345 control signals to it.
As for Fig. 2, signal switching device employed in figure 3 25 and 32 can be with reference to figure 4, Fig. 4 is the schematic diagram of the signal switching device of preferred embodiment of the present invention.This signal switching device 40 includes: a plurality of power dividers 41, a plurality of switch element 43, several power combiners 45.Power divider 41 can receive a plurality of input signals 401～403 simultaneously, and this input signal 401～403 can be carried out power division, to produce corresponding signal.Switch 431 in each switch element 43 receives the signal by power divider 41 outputs in corresponding mode one to one, and switch element 43 is according to control signal 420 control switchs 431, the signal of being accepted by switch 431 with selectivity.The signal that 45 correspondences of a plurality of power combiners are exported switch element 43, just the signal exported of switch 431 carries out the synthetic back of power output signal 451～455 respectively.
Wherein, signal switching device 40 can be according to the wireless network frequency band number of when test desire test and the number of number of signals design power distributor 41, switch element 43 and power combiner 45.
As in signal analysis device 20 embodiment of Fig. 2, assumed wireless network signal number is 3, and frequency band number is 20, and promptly power divider 41 numbers of signal switching device 40 are 20, to admit 20 conducting frequency bands.For convenience of description, be made as 3, and accordingly, each switch element 43 respectively have 20 switches 431 at this number with this switch element 43.Each switch element 43 promptly receives the signal of being exported by 20 power dividers 41, and each switch element 43 is all according to control signal 245, and the On/Off of control switch 431 is to reach optionally output signal.45 signals that aforementioned switches 431 is exported of power combiner synthesize signal 451～453 respectively, and this is the output signal of signal switching device 40.
As in signal generation device 30 embodiment of Fig. 3, assumed wireless network signal number is 3, and frequency band number is 20, and promptly power combiner 45 numbers of signal switching device 40 are 20, so that 20 conducting frequency bands to be provided.For convenience of description, be made as 20, and accordingly, each switch element 13 respectively have 3 switches 431 at this number with this switch element 43.Each switch element 43 promptly receives the signal of being exported by 3 power dividers 11, and each switch element 43 is all according to control signal 345, and the On/Off of control switch 431 is to reach optionally output signal.45 signals that aforementioned switches 431 is exported of power combiner synthesize signal 451～453 respectively, and this is the output signal of signal switching device 40.
Comprehensively above-mentioned, the present invention proposes a kind of signal test system, by the setting of circulator and multiplexer, can reach to provide to accompany and survey thing and the two-way wireless transmission test of determinand.To surveying, this test macro can go out the signal acquisition on the test path by power divider except two-way, can utilize signal analysis device to be tested equally, to reach multiple analysis.And this test macro also can produce by signal generator and accompany the signal of surveying or verifying usefulness, to reach polynary test event when testing.And in the present invention, also be provided with signal switching device in signal analysis device and the signal generation device, by this signal switching device, signal analysis device can be resolved at the different frequency bands of signal, signal generation device also can produce the pulse signal of different frequency bands, with required in response to test macro.
The above only is preferred embodiment of the present invention, can not limit the scope of the invention with this.Therefore, all equalizations of doing according to claim of the present invention change and modify, and will not lose main idea of the present invention place, also do not break away from the spirit and scope of the present invention, and the former capital should be considered as further enforcement of the present invention.
Claims (25)
1. a signal test system can be tested at least one determinand, and this test macro external accompanies and survey thing so that this at least one determinand is tested, and this system comprises:
First circulator connects this and accompanies the survey thing, accompanies the test signal of surveying thing output to receive this;
Second circulator connects this at least one determinand, to receive the test signal of this at least one determinand output;
First channel simulator receives the signal that this first circulator is exported, and emulation one first wireless transmission environment;
First power divider receives the signal that this first channel simulator is exported, and to carry out power division, transfers to this second circulator again;
The second channel simulator receives the signal that this second circulator is exported, and emulation one second wireless transmission environment;
Second power divider receives the signal that this second channel simulator is exported, and to carry out power division, transfers to this first circulator again;
First duplexer receives the signal that this first and second power divider is exported respectively; And
Signal analysis device receives the signal that this first duplexer is exported, and analyzes the signal of this first duplexer output again;
Wherein, this first circulator receives the signal of this first power divider output, accompanies the signal of surveying the thing reception to produce this, and this second circulator receives the signal of this second power divider output, to produce the signal that this at least one determinand receives.
2. signal test system as claimed in claim 1 is characterized in that, this test macro accompanies the survey thing to replace with external a plurality of survey thing of accompanying with external one, and this test macro also comprises:
First multiplexer, selectivity receive this a plurality of signals of surveying thing output of accompanying, and to receive this a plurality of signals of surveying thing output of accompanying in conjunction with this selectivity, produce the signal that this first circulator receives; And
Second multiplexer, selectivity receive the signal of this at least one determinand output, to receive the signal of this at least one determinand output in conjunction with this selectivity, produce the signal that second circulator receives;
Wherein, this first multiplexer receives the signal of this first circulator output, produce this a plurality of accompanying with the signal that separates this first circulator output and survey the signal that thing receives, this second multiplexer receives the signal of this second circulator output, produces the signal that this at least one determinand receives with the signal that separates this second circulator output.
3. signal test system as claimed in claim 1 is characterized in that, this signal analysis device comprises:
Amplifier connects this first duplexer, to amplify the signal of this first duplexer output;
Signal receiving unit connects this amplifier, to carry out power division, filtering and to change the signal that this amplifier is exported;
Signal switching device connects this signal receiving unit, to carry out power division, to select a plurality of signals of conducting and synthetic this signal receiving unit output of power to produce a plurality of composite signals; And
Signal analysis unit receives and analyzes these a plurality of composite signals.
4. signal test system as claimed in claim 3 is characterized in that, this signal receiving unit comprises:
One power divider connects this amplifier, carries out power division with the signal to this amplifier output;
A plurality of filters connect the signal that this power divider is exported one to one, to carry out the signal of this power divider output of filtering, produce a plurality of filtering signals; And
Several transducers connect these a plurality of filters one to one, with these a plurality of filtering signals of conversion, produce a plurality of signals of this signal receiving unit output.
5. signal test system as claimed in claim 3 is characterized in that this amplifier comprises a low noise amplifier.
6. signal test system as claimed in claim 4 is characterized in that, these a plurality of filters are band pass filter.
7. signal test system as claimed in claim 4 is characterized in that, the signal of this signal receiving unit output comprises intermediate-freuqncy signal.
8. signal test system as claimed in claim 1 is characterized in that, this first and second channel simulator comprises a transmission line, attenuator, delay line, equalizer, filter, limiter, digital channeliser.
9. signal test system as claimed in claim 4 is characterized in that, this signal switching device comprises:
A plurality of power dividers receive the signal that this signal receiving unit is exported one to one, to carry out the signal of this signal receiving unit output of power division;
A plurality of switch elements, each switch element connects these a plurality of power dividers, receives the signal of these a plurality of power divider outputs, to select the signal of these a plurality of power divider outputs of conducting according to a control signal; And
A plurality of power combiners connect these a plurality of switch elements one to one, with the synthetic signal of selecting these a plurality of power divider outputs of conducting, produce this a plurality of composite signals.
10. signal test system as claimed in claim 9 is characterized in that, each this switch element comprises a plurality of switches, and these a plurality of switches connect the signal of these a plurality of power divider outputs one to one, to select the signal of these a plurality of power divider outputs of conducting.
11. signal test system as claimed in claim 9 is characterized in that, this signal analysis device also comprises a detecting unit, and this detecting unit comprises:
Power detector connects this a plurality of filtering signals, produces a power detection consequential signal to detect these a plurality of filtering signals;
Analog/digital converter receives this power detection consequential signal, produces a digital signal to change this power detection consequential signal; And
The level measurer receives this digital signal, produces a level measurement signal as this control signal with the reference value of comparing this digital signal and level measurer.
12. signal test system as claimed in claim 11 is characterized in that, this power detection consequential signal is a voltage signal.
13. signal test system as claimed in claim 9 is characterized in that, these a plurality of composite signals of signal analysis unit analysis produce a frequency spectrum and resolve consequential signal as this control signal.
14. signal test system as claimed in claim 11 is characterized in that, this signal analysis device also comprises a switching device shifter, and this switching device shifter comprises:
First signal analyzer receives this level measurement signal;
The secondary signal analyzer, a frequency spectrum that receives this signal analysis unit generation resolves consequential signal; And
Diverter switch, this first signal analyzer and this secondary signal analyzer basis signal intensity histogram carry out the switching that result after the clustering analysis controls this diverter switch, resolve consequential signal as this control signal to export this level measurement signal or this frequency spectrum.
15. signal test system as claimed in claim 2 also comprises:
One signal generation device is to produce a pulse signal; And
One second duplexer, connect this signal generation device, export this pulse signal to the signal of this second multiplexer as these a plurality of signal or selections of accompanying the survey thing to be exported as this at least one determinand output to select this pulse signal of output to this first multiplexer.
16. signal test system as claimed in claim 15 is characterized in that, this signal generation device comprises:
The signal generation unit;
Signal switching device connects a plurality of signals that this signal generation unit is exported, with a plurality of signals that carry out power division, select conducting and synthetic this signal generation unit of power to export;
Signal transmission unit receives a plurality of signals of this signal switching device output, with change, filtering and power is synthetic; And
Amplifier receives the signal that this signal transmission unit is exported, and produces this pulse signal with the signal that amplifies this signal transmission unit output.
17. signal test system as claimed in claim 16 is characterized in that, this signal switching device comprises:
A plurality of power dividers receive a plurality of signals that this signal generation unit is exported one to one, to carry out a plurality of signals of this signal generation unit output of power division;
A plurality of switch elements, each switch element connects these a plurality of power dividers, receives the signal of these a plurality of power divider outputs, to select the signal of these a plurality of power divider outputs of conducting according to a control signal; And
A plurality of power combiners connect these a plurality of switch elements one to one, produce a plurality of signals of this signal switching device output with the synthetic signal of these a plurality of power divider outputs of conducting of selecting.
18. signal test system as claimed in claim 17 is characterized in that, each this switch element comprises a plurality of switches, and these a plurality of switches connect the signal of these a plurality of power divider outputs one to one, to select the signal of these a plurality of power divider outputs of conducting.
19. signal test system as claimed in claim 17 is characterized in that, this signal transmission unit comprises:
A plurality of transducers receive a plurality of signals that this signal switching device is exported one to one, to change a plurality of signals of this signal switching device output;
A plurality of filters connect the signal that these a plurality of transducers are exported one to one, produce a plurality of filtering signals with the signal that carries out these a plurality of transducers outputs of filtering; And
Power combiner connects this a plurality of filters, produces the signal of this signal transmission unit output to carry out synthetic these a plurality of filtering signals of power.
20. signal test system as claimed in claim 19 is characterized in that, the signal of this transducer output comprises high-frequency signal.
21. signal test system as claimed in claim 19 is characterized in that, described filter is a band pass filter.
22. signal test system as claimed in claim 19 is characterized in that, signal generation device also comprises a detecting unit, and this detecting unit comprises:
Power detector connects this a plurality of filtering signals, produces a power detection consequential signal to detect these a plurality of filtering signals;
Analog/digital converter receives this power detection consequential signal, produces a digital signal to change this power detection consequential signal; And
The level measurer receives this digital signal, produces a testing result signal as this control signal with the reference value of comparing this digital signal and level measurer.
23. signal test system as claimed in claim 22 is characterized in that, this signal generation unit produces an estimation results signal as this control signal.
24. signal test system as claimed in claim 22 is characterized in that, this power detection consequential signal is a voltage signal.
25. signal test system as claimed in claim 23 is characterized in that, this signal generation device also comprises a switching device shifter, and this switching device shifter comprises:
First signal analyzer receives this testing result signal;
The secondary signal analyzer receives the estimation results signal that this signal generation unit produces; And
Diverter switch, this first signal analyzer and this secondary signal analyzer basis signal intensity histogram carry out the clustering analysis, and produce this control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510073195A CN100594687C (en) | 2005-06-01 | 2005-06-01 | Signal test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510073195A CN100594687C (en) | 2005-06-01 | 2005-06-01 | Signal test system |
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| Publication Number | Publication Date |
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| CN1874203A CN1874203A (en) | 2006-12-06 |
| CN100594687C true CN100594687C (en) | 2010-03-17 |
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| CN200510073195A Expired - Fee Related CN100594687C (en) | 2005-06-01 | 2005-06-01 | Signal test system |
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| CN (1) | CN100594687C (en) |
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| CN1874203A (en) | 2006-12-06 |
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