CN102421133A - Mode switching method of multi-mode mobile terminal test equipment and apparatus thereof - Google Patents
Mode switching method of multi-mode mobile terminal test equipment and apparatus thereof Download PDFInfo
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Abstract
The invention discloses a mode switching method of multi-mode mobile terminal test equipment and an apparatus thereof, wherein, a radio frequency module converts a radio frequency signal of a detected terminal into an analog intermediate frequency signal; a digital analog conversion module converts the analog intermediate frequency signal into a digital intermediate frequency signal; a digital intermediate frequency processing module carries out processing on the digital intermediate frequency signal to obtain base-band digital signals of rates corresponding to different communication modes and respectively outputs the base-band digital signals to corresponding signaling processing modules; the signaling processing modules carry out uplink channel demodulation and protocol processing on the signals outputted by the digital intermediate frequency processing module, and according to a communication mode switching command, when a target communication mode is a communication mode corresponding to a present module, output a downlink channel modulation signal processed by the present module to the digital intermediate frequency processing module; according to an uplink signal outputted by the digital intermediate frequency processing module, and according to a given measurement type, the measuring module carries out uplink signal measurement. By employing the method and the apparatus in the invention, system mode switching efficiency is raised.
Description
Technical field
The present invention relates to the mobile communication terminal measuring technology in the communication technical field, relate in particular to a kind of mode switching method and device of multi-module mobile terminal testing equipment.
Background technology
3-G (Generation Three mobile communication system) (3G); Advantages such as its GSM compared to 2G (Global System for Mobile Communications, global system for mobile telecommunications) system and other wireless communication systems have that user capacity is big, wide coverage, suitable up-downgoing non-symmetrical service, the availability of frequency spectrum is high, equipment cost is low and system frequency resource is abundant.At present, along with the process of the extensive commercialization of TD-SCDMA (Time-Division Synchronization Code Division-Multiple-Access, Time Division-Synchronous Code Division Multiple Access) constantly advances, domestic dual-mode terminal is able to large-scale production and uses.
In the production process of terminal, the speed of production at terminal and test accuracy are unusual important index.Because mostly portable terminal is multimode system, this has higher requirement to production test speed and cost.For guaranteeing that thereby dual-mode terminal can switch the continuity that guarantees basic service by the TD-SCDMA sub-district to the GSM sub-district with high success rate, supports that TD-SCDMA will play crucial effects in the commercial process at the TD-SCDMA terminal to the TD-SCDMA of GSM direct-cut operation multimode terminal comprehensive test instrument.On the other hand; Because WCDMA (Wideband Code Division Multiple Access; WCDMA) system's extensive use worldwide; Support the R&D and promotion of WCDMA, also have great importance with developing for the competition of domestic instrument industry and portable terminal production industry to the multimode terminal comprehensive test instrument of the efficient direct-cut operation of GSM.
Traditional U MTS (Universal Mobile Telecommunications System, UMTS)/GSM dual-mode terminal comprehensive test instrument adopts injection hardware frequently, single system simulator usually.Tester is operated in GSM pattern following time; Clock-generating device produces the reference clock with the multiple speed of 270.833KHz; Analog if signal is carried out mould/number (A/D) and D/A (D/A) conversion (can adopt the clock of 13MHz that analog if signal is carried out 48 samplings like GSM), and data are sent to system simulator and carry out demodulation and measurement.When tester switches to UMTS pattern following time; Need reset clock-generating device and produce reference clock with the integral multiple of 1.28MHz analog if signal sampling (can adopt the clock of 122.88MHz that analog if signal is carried out 96 samplings like TD-SCDMA); And need the program of update system simulator operation, make it to accomplish UMTS system simulator function.
The state of dut terminal is divided into two kinds of situation to mode switch according to taking place constantly: switch under direct-cut operation under the connection status and the disconnected attitude. when switching under the disconnected attitude; Only need accomplish (radio frequency to the RF of tester own; Radio frequency) operating frequency, AD/DA sampling clock, Digital IF Processing are partly accomplished setting and reprovision and system simulator software; And not only need accomplish all working that switches under whole disconnected attitudes when carrying out under the connection status switching; But also need carry out Signalling exchange with dut terminal, and guiding terminal switches to the target operating state under the situation of call drop not, this has proposed requirements at the higher level to speed and success rate of switching.
The prior art scheme need reconfigure radio-frequency module, clock-generating device and Digital IF Processing module, and when between system pattern, switching like this, its switching flow is longer, causes the processing time longer, influences the production line testing efficiency.And in handoff procedure, need reload the simulator working procedure, the processing complexity increase has the risk of the failure of loading, the basic service continuity of influence in the multimode system test.
Summary of the invention
The embodiment of the invention provides a kind of mode switching method and device of multi-module mobile terminal testing equipment, is used to improve the system pattern switching efficiency.
The multi-module mobile terminal testing equipment that the embodiment of the invention provides comprises: radio-frequency module, D/A converter module, Digital IF Processing module, and the signaling processing module of at least two different communication modes, wherein:
Radio-frequency module; The radiofrequency signal that is used on up direction, tested multi-module mobile terminal being sent converts analog if signal into and exports to D/A converter module, and the analog if signal of on down direction, the mould modular converter being exported converts radiofrequency signal into and sends to tested multi-module mobile terminal;
D/A converter module; Be used on up direction, converting analog if signal into digital medium-frequency signal and export to the Digital IF Processing module, the digital medium-frequency signal of on down direction, the Digital IF Processing module being exported converts analog if signal into and exports to radio-frequency module;
The Digital IF Processing module is used at up direction, and the digital medium-frequency signal of logarithmic mode modular converter output is handled, and obtains the baseband digital signal of different communication modes rate corresponding, and exports to corresponding signaling processing module and measurement module respectively; On down direction, the signal that the corresponding signaling processing module of current communication pattern is exported carries out exporting to D/A converter module after the Digital IF Processing;
Signaling processing module; The signal that is used on up direction, the Digital IF Processing module being exported carries out up channel demodulation and protocol processes; And according to the communication pattern switching command; When the destinations traffic pattern is the communication pattern of this module correspondence, the down channel modulation signal after this resume module is exported to the Digital IF Processing module;
Measurement module according to the upward signal of Digital IF Processing module output, by given measurement type, carries out upward signal and measures.
The multi-module mobile terminal method of testing of utilizing above-mentioned multi-module mobile terminal testing equipment to realize that the embodiment of the invention provides comprises:
Radio-frequency module receives the radiofrequency signal that tested multi-module mobile terminal sends, and is converted into analog if signal and exports to D/A converter module;
D/A converter module converts analog if signal into digital medium-frequency signal and exports to the Digital IF Processing module;
The digital medium-frequency signal of Digital IF Processing module logarithmic mode modular converter output is handled; Obtain the baseband digital signal of different communication modes rate corresponding; And export to corresponding signaling processing module respectively; And export to measurement module, so that, carrying out upward signal by given measurement type, measures measurement module;
Signaling processing module carries out up channel demodulation and protocol processes to the signal of Digital IF Processing module output; And according to the communication pattern switching command; When the destinations traffic pattern is the communication pattern of this module correspondence, the down channel modulation signal after this resume module is exported to the Digital IF Processing module;
The Digital IF Processing module carries out exporting to D/A converter module after the Digital IF Processing to the signal of the corresponding signaling processing module output of current communication pattern;
The digital medium-frequency signal that D/A converter module is exported the Digital IF Processing module converts analog if signal into and exports to radio-frequency module;
The analog if signal that radio-frequency module is exported the mould modular converter converts radiofrequency signal into and sends to tested multi-module mobile terminal.
The above embodiment of the present invention; Adopt the parallel processing of many signaling processing modules; The mode of operation handover operation is handled through in operating signaling processing module of difference and test module, choosing suitable data according to switching command, has avoided conventional method in handoff procedure, need restart and load the problem of signaling process program, has improved system effectiveness; Reduce the risk that flow process is made mistakes when having accelerated switch speed, guaranteed the basic service continuity in the multimode system test.
Description of drawings
The quick switched system general frame of the pattern sketch map of the UMTS/GSM multi-module mobile terminal comprehensive test instrument that Fig. 1 provides for the embodiment of the invention;
The quick switching flow sketch map of pattern of the UMTS/GSM multi-module mobile terminal comprehensive test instrument that Fig. 2 provides for the embodiment of the invention;
The configuration diagram of the clock module of the UMTS/GSM multi-module mobile terminal comprehensive test instrument that Fig. 3 provides for the embodiment of the invention;
Fig. 4 handles and instrumentation plan for the UMTS/GSM multi-module mobile terminal comprehensive test instrument parallel schema upstream data that the embodiment of the invention provides;
Fig. 5 handles sketch map for the UMTS/GSM multi-module mobile terminal comprehensive test instrument parallel schema downlink data that the embodiment of the invention provides;
The GSU processing signals of the GSM that Fig. 6 provides for the embodiment of the invention relevant up/descending at the inner realization block diagram of FPGA;
The FPGA nonuniform sampling part digital signal processing device figure that Fig. 7 provides for the embodiment of the invention.
Embodiment
With UMTS and GSM multimode terminal comprehensive test instrument the UMTS/GSM dual-mode terminal being tested below is example, and combines accompanying drawing, the pattern of multimode terminal testing equipment is switched implementation procedure fast be described in detail.Those skilled in the art will be understood that the multimode terminal for other communication type, and the multimode terminal comprehensive test instrument also can be tested multimode terminal based on the thought that the embodiment of the invention provides, and realize switching fast.
Referring to Fig. 1, the quick switched system general frame of the pattern sketch map of the UMTS/GSM multi-module mobile terminal comprehensive test instrument that provides for the embodiment of the invention.
As shown in the figure, portable terminal (UE) 100 is connected to tester 200 through radio frequency (RF) module.Tester 200 comprises radio-frequency module 1, modulus/D/A converter module 2, Digital IF Processing module 3, UMTS signaling processing module 4, GSM signaling processing module 5, measurement module 6, clock module 7, also can comprise control/display module 8.Wherein, Controlled function in the control/display module 8 is used to realize the control and treatment of mode of operation switching etc.; Presentation Function in the control/display module 8 is used for the signal after UMTS signaling processing module 4, GSM signaling processing module 5 and measurement module 6 processing is shown output, so that the comparative analysis test result.
On up direction, the radiofrequency signal that EM equipment module 1 sends tested UE converts analog if signal into and exports to modulus/D/A converter module 2; Modulus/D/A converter module 2 converts analog if signal into digital medium-frequency signal and exports to Digital IF Processing module 3; The digital medium-frequency signal of Digital IF Processing module 3 logarithmic mode modular converters output is handled; Obtain the baseband digital signal of UMTS pattern and GSM pattern rate corresponding respectively; And corresponding baseband digital signal is exported to corresponding signaling processing module carry out up channel demodulation and protocol processes; For example, the baseband digital signal of UMTS pattern rate corresponding is exported to UMTS signaling processing module 4, the baseband digital signal of GSM pattern rate corresponding is exported to GSM signaling processing module 5.Tester selects the data after corresponding signaling processing module is handled to measure according to current mode of operation; For example; When current mode of operation is the UMTS pattern; Tester selects the up channel restituted signal after UMTS signaling processing module 4 is handled to measure, and when current mode of operation is the GSM pattern, selects the up channel restituted signal after GSM signaling processing module 5 is handled to measure.
On down direction; According to current mode of operation; Corresponding signaling processing module output baseband digital signal gives Digital IF Processing module 3 (when being the UMTS pattern like the work at present pattern; UMTS signaling processing module 4 output UMTS down channel modulating baseband digital signals are given Digital IF Processing module 3; When the work at present pattern was the GSM pattern, GSM signaling processing module 5 output GSM down channel modulating baseband digital signals were given Digital IF Processing module 3), 3 pairs of baseband digital signals that receive of Digital IF Processing module carry out exporting to modulus/D/A converter module 2 after the Digital IF Processing; Modulus/D/A converter module 2 converts the digital medium-frequency signal that receives into analog if signal and exports to radio-frequency module 1, and radio-frequency module 1 converts the analog if signal that receives into radiofrequency signal and sends to tested UE.
Concrete, measurement module 6 is mainly used in completion upward signal is carried out measuring operation, that is, according to the signal of upstream digital intermediate frequency output, by given measurement type, accomplish upward signal and measure, and measurement module 6 can adopt existing mode to realize.After control/display module 8 was provided with parameters such as measuring type and trigger condition, radio-frequency module 1 began respectively upward signal to be carried out the analog and digital signal power detection with Digital IF Processing module 3, and sends to measurement module 6 in order to trigger judgement.The triggering mode that measurement module 6 is selected according to control/display module 8 selects to trigger judgment condition, waits for the up input signal that meets the condition of setting.When up input signal satisfied trigger condition, measurement module 6 obtained upward signal and begins input signal is carried out Measurement and analysis, and the result is outputed to control/display module 8.
In the embodiment of the invention, signaling processing module of all working pattern in the tester (comprising UMTS signaling processing module 4 and GSM signaling processing module 5) and measurement module all adopt the parallel processing framework.When system start-up, the signaling processing module of all working pattern and measurement module all get into the concurrent working state, can receive, send and handle the sampled data that Digital IF Processing module 3 is sent.Select the signal data of corresponding signaling processing module to handle according to current UE test pattern.When mode of operation is switched, only need change to corresponding signaling processing module, and begin the data of its processing are handled according to switching command, the quick mode that can accomplish in tester switches and measurement.
The embodiment of the invention has avoided conventional method in handoff procedure, need restart and load the problem of signal command board program through in handoff procedure, utilizing the parallel processing of many signaling processing modules, has improved system effectiveness, has reduced the risk that flow process is made mistakes.
Below in conjunction with Fig. 2 to Fig. 7, specify the quick switching flow of pattern of the UMTS/GSM multi-module mobile terminal comprehensive test instrument that the embodiment of the invention provided and the structure of this testing equipment.
Referring to Fig. 2, the quick switching flow sketch map of pattern of the UMTS/GSM multi-module mobile terminal comprehensive test instrument that provides for the embodiment of the invention.
As shown in Figure 2, tested UE is connected to the radio-frequency module 1 of tester through the radio frequency cable, and radio-frequency module 1 is accomplished the mutual conversion of radiofrequency signal and intermediate-freuqncy signal.Clock module 7 fixedly generated frequency is the work clock of 122.88MHz.Modulus/D/A converter module 2 utilizes this work clock to accomplish the mutual conversion of analog if signal and digital medium-frequency signal.In the Digital IF Processing part; At first use NCO (numerical controlled oscillator; Numerically-controlled oscillator) carries out the conversion of digital medium-frequency signal and digital baseband signal; Concrete, one side is utilized the frame of reference clock of 13MHz, and the digital baseband signal that application nonuniform sampling mode produces 16 times of GSM sample rates carries out the GSM demodulation; Utilize the 122.88MHz work clock on the other hand; Application filtering extraction mode produces the baseband sampling data that are fit to the UMTS processing and carries out the UMTS demodulation; And use measurement module 6 to handle the original base band data simultaneously, finally export the measurement result of handled moulds (UMTS signaling processing module 4 or GSM signaling processing module 5) and accomplish Presentation Function by control/display module 8 according to current test pattern instruction.
The framework of the clock module 7 in the system shown in Figure 2 framework can be as shown in Figure 3; Wherein, Use DDS (Direct digital synthesizer, immediate data frequency synthesizer) the 71 fixing 122.88MHz of generation work clocks, for modulus/D/A converter module 2 provides reference clock.At FPGA (Field-Programmable Gate Array; Be field programmable gate array) in the module 72; Utilize this reference clock respectively through DCM (digital clock manager; The digital dock manager) module 721 produces the FPGA system clock of the 122.88MHz that is fit to UMTS, produces the reference clock of the 13MHz that is fit to GSM through PLL (Phase locked loop, phase-locked loop)/DCM module 722.
Radio-frequency module 1 in the system shown in Figure 2 framework is accomplished after the analog radio-frequency signal and the conversion between the analog if signal of communicating by letter with tested UE; Modulus/D/A converter module 2 will be accomplished the mutual conversion of analog intermediate frequency and digital intermediate frequency, carry out Digital IF Processing by Digital IF Processing module 3 then.In embodiments of the present invention, realize a series of Digital IF Processing functions, comprising the sample of signal data being carried out processing such as frequency conversion, rate transition, filtering, gain controlling by FPGA.
Concrete; In uplink, as shown in Figure 4, clock module 7 produces different system clocks according to the 122.88MHz clock signal; Analog intermediate frequency signal converts digital signal into through the analog-to-digital conversion of fixed sampling frequency; In the FPGA module, carry out multi-rate digital signal and handle, generate the sampled signal of multiple speed, to adapt to the data processing requirement of different mode.Wherein, the use extracted at equal intervals/sampled data of the 15.36Msps speed that filtering generates is transferred to UMTS signaling processing module 4 and handles; Use the sampled data (the about 4.33Msps of data rate) of 16 times of GSM sample rates of nonuniform sampling generation to be transferred to GSM signaling processing module 5 completion signaling process flow processs.And for measurement, then according to measuring type Dynamic Selection suitable data type, accomplish measurement function and export measurement result by measurement module 6.
In downlink processing, as shown in Figure 5, it is the chip data (is 1.28Msps like TD-SCDMA speed) behind the spread spectrum that UMTS signaling processing module 4 sends data, and GSM signaling processing module 5 sends 16 haplotype data speed (about 4.333Msps) simultaneously.Tester sends to modulus/D/A converter module 2 according to the suitable circuit-switched data of work at present model selection and handles after sample rate conversion, frequency conversion; Use the 122.88MHz reference clock to accomplish digital-to-analogue conversion and generate analog if signal, after generate radiofrequency signal through radio-frequency module 1 and send to tested UE.
In the FPGA of Digital IF Processing module 3,, can utilize and extract or the direct integral multiple speed sampled data that is fit to UMTS that generates of filtering interpolation because reference clock is 122.88MHz.For the sampled data of GSM, in up processing and downlink processing, adopt different handling processes in the processing procedure of FPGA.
In up processing; Shown in Fig. 6 a; At first analog if signal is carried out analog-to-digital conversion and is converted to the digital baseband that base band obtains 61.44Msps; Use the GSM reference work clock of 13MHz to utilize non-homogeneous extraction appearance principle that the digital medium-frequency signal of 61.44Msps is resampled then, produce (about 4.333Msps) sampled signal of 16 times of GSM character rates, be transferred to GSM signaling processing module 5.
In downlink processing; Shown in Fig. 6 b, GSM signaling processing module 5 produces (about 4.333Msps) data-signal of 16 times of speed, produces the unequal interval sampled signal of 3.84Msps through the non-homogeneous extraction appearance of FPGA; Pass through low pass filter and 4 times of interpolation low pass filters then; Obtain the equal interval sampling data of 15.36Msps data rate, after revert to the baseband digital data of 30.72Msps speed, transform through digital-to-analogue and to obtain the analog intermediate frequency data and send to radio-frequency module 1 by half band filter.
Wherein, in the digital signal processing device of FPGA, the implementation of the non-homogeneous part that resamples is by shown in Figure 7.Non-homogeneous resampling relates to two clock zones, under the 122.88MHz clock, latchs the 13MHz input signal and detects its rising edge.The raw sample data of 61.44Msps deposits the two-stage delay line in successively with the 122.88MHz work clock simultaneously, for the SFDR (SFDR) that increases system, is selected the multiplexer dateout of control again by the PN sign indicating number.The last 13Msps data sample that output was extracted again under the control of 13MHz reference clock signal.
Can find out through above flow process; The embodiment of the invention adopts the parallel processing of many signaling processing modules in tester; The mode of operation switching in fact only need be chosen suitable data according to switching command and handle in operating signaling processing module of difference and test module; Avoided conventional method in handoff procedure, need restart and load the problem of signaling process program; Improve system effectiveness, reduced the risk that flow process is made mistakes when having accelerated switch speed, guaranteed the basic service continuity in the multimode system test.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize through hardware, also can realize by the mode that hardware adds essential software certainly.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of hardware product, and this hardware product can be the mobile phone terminal tester, perhaps equipment such as VSA.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be looked protection scope of the present invention.
Claims (16)
1. a multi-module mobile terminal testing equipment is characterized in that, comprising: radio-frequency module, D/A converter module, Digital IF Processing module and measurement module, and the signaling processing module of at least two different communication modes, wherein:
Radio-frequency module; The radiofrequency signal that is used on up direction, tested multi-module mobile terminal being sent converts analog if signal into and exports to D/A converter module, and the analog if signal of on down direction, analog-to-digital conversion module being exported converts radiofrequency signal into and sends to tested multi-module mobile terminal;
D/A converter module; Be used on up direction, converting analog if signal into digital medium-frequency signal and export to the Digital IF Processing module, the digital medium-frequency signal of on down direction, the Digital IF Processing module being exported converts analog if signal into and exports to radio-frequency module;
The Digital IF Processing module is used at up direction, and the digital medium-frequency signal of logarithmic mode modular converter output is handled, and obtains the baseband digital signal of different communication modes rate corresponding, and exports to corresponding signaling processing module respectively; On down direction, the signal that the corresponding signaling processing module of current communication pattern is exported carries out exporting to D/A converter module after the Digital IF Processing;
Signaling processing module; The signal that is used on up direction, the Digital IF Processing module being exported carries out up channel demodulation and protocol processes; And according to the communication pattern switching command; When the destinations traffic pattern is the communication pattern of this module correspondence, the down channel modulation signal after this resume module is exported to the Digital IF Processing module;
Measurement module according to the upward signal of Digital IF Processing module output, by given measurement type, carries out upward signal and measures.
2. multi-module mobile terminal testing equipment as claimed in claim 1 is characterized in that, also comprises clock module;
Said clock module; Be used to generate the reference clock signal of first frequency reference clock signal and second frequency; And the first frequency reference clock signal exported to D/A converter module, first frequency reference clock signal and second frequency reference clock signal are exported to the Digital IF Processing module; Wherein, first frequency is higher than second frequency;
Said D/A converter module specifically is used for, and carries out modulus or digital-to-analogue conversion according to the first frequency reference clock signal;
Said Digital IF Processing module specifically is used for, and according to the first frequency reference clock signal, adopting equidistantly, sampling generates the baseband digital signal of the first communication pattern rate corresponding and exports to first signaling processing module; According to the second frequency reference clock signal, adopt the baseband digital signal of nonuniform sampling generation second communication pattern rate corresponding and export to second signaling processing module.
3. multi-module mobile terminal testing equipment as claimed in claim 2; It is characterized in that; Said first frequency is 122.88MHz; Said second frequency is 13MHz, and said first signaling processing module is a UMTS UMTS signaling processing module, and said second signaling processing module is a global system for mobile telecommunications GSM signaling processing module;
Said Digital IF Processing module specifically is used for, and on up direction, adopts extracted at equal intervals filtering to obtain being fit to the baseband sampling signal of UMTS pattern speed and exporting to the UMTS signaling processing module according to the 122.88MHz reference clock signal to digital medium-frequency signal; According to the 13MHz reference clock signal, digital medium-frequency signal is adopted non-homogeneous extraction appearance to obtain the baseband sampling signal of 16 times of GSM pattern speed and exports to the GSM signaling processing module.
4. multi-module mobile terminal testing equipment as claimed in claim 3; It is characterized in that; Said Digital IF Processing module specifically is used for, and converts the digital medium-frequency signal of D/A converter module output the digital baseband signal of 61.44Msps into, according to the 13MHz reference clock signal, utilize non-homogeneous resampling that the digital baseband signal of 61.44Msps is resampled; Obtain the sampled signal of 16 times of GSM character rates, and output it to the GSM signaling processing module.
5. multi-module mobile terminal testing equipment as claimed in claim 2; It is characterized in that said first frequency is 122.88MHz, said second frequency is 13MHz; Said first signaling processing module is the UMTS signaling processing module, and said second signaling processing module is the GSM signaling processing module;
Said Digital IF Processing module specifically is used for; On down direction; Chip data-signal behind the spread spectrum that reception UMTS signaling processing module sends; Receive the data-signal of 16 times of speed of GSM signaling processing module transmission, when current communication pattern is the UMTS pattern, select the data-signal of UMTS signaling processing module output to carry out exporting to analog-to-digital conversion module after the Digital IF Processing; When current communication pattern is the GSM pattern, select the data-signal of GSM signaling processing module output to carry out exporting to analog-to-digital conversion module after the Digital IF Processing.
6. multi-module mobile terminal testing equipment as claimed in claim 5; It is characterized in that; Said Digital IF Processing module specifically is used for, when current communication pattern is the GSM pattern, to the data-signal of 16 times of speed of GSM signaling processing module output; Carry out non-homogeneous extraction appearance and obtain the unequal interval sampled signal of 3.84Msps; Obtain the equal interval sampling data of 15.36Msps data rate through low pass filter and 4 times of interpolation low pass filters, revert to the baseband digital signal of 30.72Msps speed, and this baseband digital signal is exported to analog-to-digital conversion module via half band filter.
7. multi-module mobile terminal testing equipment as claimed in claim 2 is characterized in that, said Digital IF Processing module specifically is used for, and when carrying out non-homogeneous resampling, under the 122.88MHz clock, latchs the 13MHz input signal and detects its rising edge; Deposit the raw sample data of 61.44Msps in the two-stage delay line successively with the 122.88MHz work clock, by the multiplexer dateout of PN sign indicating number selection control, the 13Msps data sample that output was extracted again under the control of 13MHz reference clock signal.
8. multi-module mobile terminal testing equipment as claimed in claim 2 is characterized in that, said first frequency is 122.88MHz, and said second frequency is 13MHz;
Said clock module comprises: immediate data frequency synthesizer DDS and FPGA, comprise digital dock manager DCM and phase-locked loop pll/DCM among the said FPGA, wherein:
Immediate data frequency synthesizer DDS is used to generate the 122.88MHz clock signal, and exports to digital dock manager DCM and phase-locked loop pll/DCM respectively;
Digital dock manager DCM is used for generating the 122.88MHz reference clock signal that is fit to the UMTS pattern according to the 122.88MHz clock signal;
Phase-locked loop pll/DCM is used for generating the 13MHz reference clock signal that is fit to the GSM pattern according to the 122.88MHz clock signal.
9. multi-module mobile terminal method of testing of utilizing multi-module mobile terminal testing equipment as claimed in claim 1 to realize is characterized in that this method comprises:
Radio-frequency module receives the radiofrequency signal that tested multi-module mobile terminal sends, and is converted into analog if signal and exports to D/A converter module;
D/A converter module converts analog if signal into digital medium-frequency signal and exports to the Digital IF Processing module;
The digital medium-frequency signal of Digital IF Processing module logarithmic mode modular converter output is handled; Obtain the baseband digital signal of different communication modes rate corresponding; And export to corresponding signaling processing module respectively; And export to measurement module, so that, carrying out upward signal by given measurement type, measures measurement module;
Signaling processing module carries out up channel demodulation and protocol processes to the signal of Digital IF Processing module output; And according to the communication pattern switching command; When the destinations traffic pattern is the communication pattern of this module correspondence, the down channel modulation signal after this resume module is exported to the Digital IF Processing module;
The Digital IF Processing module carries out exporting to D/A converter module after the Digital IF Processing to the signal of the corresponding signaling processing module output of current communication pattern;
The digital medium-frequency signal that D/A converter module is exported the Digital IF Processing module converts analog if signal into and exports to radio-frequency module;
The analog if signal that radio-frequency module is exported the mould modular converter converts radiofrequency signal into and sends to tested multi-module mobile terminal.
10. method as claimed in claim 9; It is characterized in that; Said multi-module mobile terminal testing equipment also comprises clock module; This method also comprises: said clock module generates the reference clock signal of first frequency reference clock signal and second frequency, and the first frequency reference clock signal is exported to D/A converter module, and first frequency reference clock signal and second frequency reference clock signal are exported to the Digital IF Processing module; Wherein, first frequency is higher than second frequency;
Said D/A converter module is carried out modulus or digital-to-analogue conversion according to the first frequency clock signal;
Said Digital IF Processing module is according to the first frequency reference clock signal, and adopting equidistantly, sampling generates the baseband digital signal of the first communication pattern rate corresponding and exports to first signaling processing module; According to the second frequency reference clock signal, adopt the baseband digital signal of nonuniform sampling generation second communication pattern rate corresponding and export to second signaling processing module.
11. method as claimed in claim 10; It is characterized in that; Said first frequency is 122.88MHz; Said second frequency is 13MHz, and said first signaling processing module is a UMTS UMTS signaling processing module, and said second signaling processing module is a global system for mobile telecommunications GSM signaling processing module;
Said Digital IF Processing module adopts extracted at equal intervals filtering to obtain being fit to the baseband sampling signal of UMTS pattern speed and exporting to the UMTS signaling processing module according to the 122.88MHz reference clock signal to digital medium-frequency signal on up direction; According to the 13MHz reference clock signal, adopt nonuniform sampling to obtain the baseband sampling signal of 16 times of GSM pattern speed and export to the GSM signaling processing module to digital medium-frequency signal.
12. method as claimed in claim 11; It is characterized in that; Said Digital IF Processing module is according to the 122.88MHz reference clock signal, converts the digital medium-frequency signal of D/A converter module output the digital baseband signal of 61.44Msps into, according to the 13MHz reference clock signal, utilize non-homogeneous resampling that the digital baseband signal of 61.44Msps is resampled; Obtain the sampled signal of 16 times of GSM character rates, and output it to the GSM signaling processing module.
13. method as claimed in claim 10 is characterized in that, said first frequency is 122.88MHz, and said second frequency is 13MHz, and said first signaling processing module is the UMTS signaling processing module, and said second signaling processing module is the GSM signaling processing module;
Said Digital IF Processing module is on down direction; Chip data-signal behind the spread spectrum that reception UMTS signaling processing module sends; Receive the data-signal of 16 times of speed of GSM signaling processing module transmission; When current communication pattern is the UMTS pattern; Select the data-signal of UMTS signaling processing module output to carry out exporting to analog-to-digital conversion module after the Digital IF Processing, when current communication pattern is the GSM pattern, select the data-signal of GSM signaling processing module output to carry out exporting to analog-to-digital conversion module after the Digital IF Processing.
14. method as claimed in claim 13; It is characterized in that; Said Digital IF Processing module is when current communication pattern is the GSM pattern; Data-signal to 16 times of speed of GSM signaling processing module output carries out the unequal interval sampled signal that non-homogeneous extraction appearance obtains 3.84Msps, obtains the equal interval sampling data of 15.36Msps data rate through low pass filter and 4 times of interpolation low pass filters; Revert to the baseband digital signal of 30.72Msps speed via half band filter, and this baseband digital signal is exported to analog-to-digital conversion module.
15. method as claimed in claim 10 is characterized in that, said Digital IF Processing module latchs the 13MHz input signal and detects its rising edge when carrying out non-homogeneous resampling under the 122.88MHz clock; Deposit the raw sample data of 61.44Msps in the two-stage delay line successively with the 122.88MHz work clock, by the multiplexer dateout of PN sign indicating number selection control, the 13Msps data sample that output was extracted again under the control of 13MHz reference clock signal.
16. method as claimed in claim 10 is characterized in that, said first frequency is 122.88MHz, and said second frequency is 13MHz;
Said clock module comprises: immediate data frequency synthesizer DDS and FPGA, comprise digital dock manager DCM and phase-locked loop pll/DCM among the said FPGA, wherein:
Immediate data frequency synthesizer DDS generates the 122.88MHz clock signal, and exports to digital dock manager DCM and phase-locked loop pll/DCM respectively;
Digital dock manager DCM generates the 122.88MHz reference clock signal that is fit to the UMTS pattern according to the 122.88MHz clock signal;
Phase-locked loop pll/DCM generates the 13MHz reference clock signal that is fit to the GSM pattern according to the 122.88MHz clock signal.
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| CN102421133B (en) | 2014-11-12 |
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