CN108541010A - A kind of multi-mode communication system simulation field testing method - Google Patents

A kind of multi-mode communication system simulation field testing method Download PDF

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Publication number
CN108541010A
CN108541010A CN201710122587.7A CN201710122587A CN108541010A CN 108541010 A CN108541010 A CN 108541010A CN 201710122587 A CN201710122587 A CN 201710122587A CN 108541010 A CN108541010 A CN 108541010A
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gsm
signal
lte
mobile terminal
testing
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CN108541010B (en
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李雷
张翔
郭凤然
陈凯
杨思远
徐菲
魏贵明
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China Academy of Information and Communications Technology CAICT
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China Academy of Telecommunications Research CATR
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/06Testing, supervising or monitoring using simulated traffic

Abstract

This application discloses a kind of multi-mode communication systems to simulate field testing method, includes the following steps:Reception signal of multiple wireless communication systems in true field testing environment is recorded respectively using with reference to mobile terminal, including signal strength and signal-to-noise ratio sampled value;Interpolation processing is carried out to the data of the multiple wireless telecommunication system signal, realizes Data Integration;Indoors in test environment, the base station output signal of the multiple wireless communication system is handled with channel simulator, using the data creating channel files after integration, is used for the output signal power and noise figure of control channel simulator;Tested mobile terminal is connected in the output end of the channel simulator, the performance of the tested mobile terminal is tested.Traditional outfield multimode test is substituted with the method for the present invention, it is cost-effective, result is accurate, reproducible, orientation problem is accurate, optimize convenient for terminal capabilities.

Description

A kind of multi-mode communication system simulation field testing method
Technical field
This application involves wireless communication technology field more particularly to a kind of simulation drive test sides for multi-mode communication system Method.
Background technology
In order to meet the successional communication experiences of user, 4G networks often covering Chong Die with 2G or 3G network, when 4G networks When dtr signal, terminal can be made to switch or reselect to 3G or 2G networks by different interoperability of system.It is coexisted in 2G/3G/4G Under scene, the performance test that different interoperability of system is carried out for mobile terminal is very necessary.The test of optimization property usually requires By channel simulator, stable decline interference scene is generated, and the channel model used in simulator, generally advised using agreement Fixed theoretical model, there is some difference with actual propagation environment, and therefore, a large amount of field testing is currently each manufacturer to terminal Carry out another means of Performance.Since field testing project is various, and outfield communication environments are extremely complex, be easy by To the influence of the extraneous factors such as weather, vehicle, road, the stream of people, the problem is reappeared difficult in test, test period usually compared with It is long, increase the difficulty of performance optimization.
Invention content
The present invention proposes that a kind of multi-mode communication system simulates field testing method, and solution field testing influence factor is more, surveys Try difficult problem.
The embodiment of the present application provides a kind of multi-mode communication system simulation field testing method, includes the following steps:
The reception of TD-LTE system and gsm system in true field testing environment is recorded respectively using with reference to mobile terminal Signal, including signal strength and signal-to-noise ratio sampled value;
Signal strength and signal-to-noise ratio sampled value to the TD-LTE system and gsm system carry out interpolation processing, realize number According to integration;
Indoors in test environment, with channel simulator to the base station output signal of the TD-LTE system and gsm system It is handled, using the data creating channel files after integration, is used for the output signal power and noise of control channel simulator Value, make it is described with reference to mobile terminal in received signal power and the true field testing environment of channel simulator output end Received signal power it is identical, make it is described with reference to mobile terminal channel simulator output end received signal to noise ratio with it is described true Received signal to noise ratio in field testing environment is identical;
Tested mobile terminal is connected in the output end of the channel simulator, the performance of the tested mobile terminal is carried out Test.
Further, in the multi-mode communication system simulation field testing method, the signal strength and signal-to-noise ratio sampling Value, including RSRP and SINR that TD-LTE system defines;Also include the RSSI and SINR that gsm system defines.
Preferably, multi-mode communication system described in any one embodiment of the present invention simulates field testing method, the interpolation The step of processing, is as follows:With incremental sequence integration TD-LTE and the GSM sample record of sampling instant, if the h articles record and h+m + 1 is recorded as two adjacent TD-LTE sample recordsWithThe h+1 articles records to the h+m articles and is recorded as GSM sample records, only GSM information are then recorded at the h+1 articles to filling up m TD-LTE sampling notes on the h+m articles record position Record,
The RSRP sample records of addition are:
The SINR sample records of addition are:
Wherein, h, m, i are natural number, x0RSRP, y are defined for TD-LTE system0The SINR defined for TD-LTE system.
With incremental sequence integration TD-LTE and the GSM sample record of sampling instant, if kth item record and kth+n+1 items note Record is two adjacent GSM sample recordsWith+ 1 record to kth+n item of kth is recorded as TD-LTE Sample record, only TD-LTE information;Corresponding n GSM samplings are then filled up on+1 record to+n record position of kth of kth,
The RSSI sample records of addition are:
The SINR sample records of addition are:
Wherein, k, n, p are natural number, x1For the RSSI that gsm system defines, y1The SINR defined for gsm system.
The scheme advanced optimized, the multi-mode communication system simulate field testing method, control the channel simulator The TD-LTE signal powers of outputAnd noise powerRespectively:
Wherein, θ0And θ1The total number of records of reception signals of the respectively TD-LTE and GSM in true field testing environment, l For natural number;And x0Respectively refer to the TD-LTE that mobile terminal receives in test environment and field testing environment indoors RSRP defined in system,For channel simulator TD-LTE access initial state output powers;y0It is defined for TD-LTE system SINR;N0For TD-LTE system noise power-value.
The scheme advanced optimized, the multi-mode communication system simulate field testing method, control the channel simulator Output GSM signal powersAnd noise powerRespectively
Wherein, θ0And θ1The total number of records of reception signals of the respectively TD-LTE and GSM in true field testing environment, l For natural number;x1For the RSSI that gsm system defines, y1The SINR defined for gsm system.
The scheme advanced optimized, the multi-mode communication system simulates field testing method, indoors under test environment, TD-LTE system and the connection type of mobile terminal are:The main signal port of LTE base station and auxiliary signal port are passed through into conjunction respectively Road device is combined, respectively input channel simulator, and output letter in 2 tunnels is formed after channel simulator 2 × 2MIMO Channel Processings Number, it is respectively connected to the auxiliary signal RF receiving port of TD-LTE main signal radio frequencies receiving port, TD-LTE of mobile terminal;It is described Mobile terminal is described with reference to mobile terminal or the tested mobile terminal.
Further, indoors under test environment, the connection type of gsm system and mobile terminal is:
When the base station of gsm system is single antenna, the main signal of the base stations GSM is connected to channel simulator, by channel Output signal all the way is formed after simulator processing, is connected to the GSM antenna radio frequency reception port of mobile terminal;
When the base station of gsm system is double antenna, the radiofrequency signal of the base stations GSM primary antenna and diversity antenna is separately connected To two input ports of channel simulator, 1 tunnel output signal is formed after channel simulator 1 × 2MIMO Channel Processings, even It is connected to the GSM antenna radio frequency reception port of mobile terminal.
Above-mentioned at least one technical solution that the embodiment of the present application uses can reach following advantageous effect:It is outer to substitute tradition Field multimode test, saves time cost and human cost.It is not affected by environment, test result is accurate, reproducible.Orientation problem side Just efficiently, channel effect can adjust, and optimize convenient for terminal capabilities.
Description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, constitutes part of this application, this Shen Illustrative embodiments and their description please do not constitute the improper restriction to the application for explaining the application.In the accompanying drawings:
Fig. 1 is the flow diagram that multi-mode communication system simulates field testing method;
Fig. 2 is the embodiment schematic diagram that multi-mode communication system is connect with mobile terminal under indoor test environment;
Fig. 3 is another embodiment schematic diagram that multi-mode communication system is connect with mobile terminal under indoor test environment.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the application clearer, below in conjunction with the application specific embodiment and Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing Go out the every other embodiment obtained under the premise of creative work, shall fall in the protection scope of this application.
It is theoretical how Channel Modeling is based in the lab, using true base station and instrument and meter, test system building, Not only can allow terminal obtain with same or similar performance in practical field testing, but also can to testing process height Control, test result accurate recreation is terminal and manufacturers increasingly concern.
The object of the present invention is to provide a kind of simulation road measuring methods for realizing multimode system in laboratory environment, make Terminal must be tested and receive multimode signal similar in identical or trend with practical field testing environment in simulation outfield platform, with weight The communication environments of multimode system in existing outdoor real net.
In order to achieve the above object, the present invention provides a kind of simulation road measuring method of multimode system, for TD-LTE and Gsm system, it is independent to record TD-LTE and gsm system signal, including TD-LTE first in true outfield fc-specific test FC scene RSRP (Reference Signal Received Power, unit dBm) and SINR (Signal to Interference plus Noise Ratio, unit dB), GSM RSSI (received signal strength indicator, unit dBm) and SINR, due to being influenced different drive tests by sampling bandwidth and processing capacity and setting The sampling period of standby (mobile terminal, sweep generator) is generally different, it is therefore desirable to be inserted to the data of different road measuring devices record Value processing, to synchronize the acquisition signal of each test equipment;In addition, due to mobile terminal for TD-LTE and gsm system most Small records interval is different, and the TD-LTE smallest record periods are 10ms, and the GSM smallest record periods are 4.615ms, it is therefore desirable to right TD-LTE and gsm system record data carry out integration processing, to synchronize multisystem signal intensity.Data after integration are imported into meter Calculation machine, and channel files are made, principle is to determine channel simulator output signal according to TD-LTE RSRP and GSM RSSI Power;The noise of addition is determined further according to TD-LTE SINR and GSM SINR, target is so that terminal receives in true outfield To multimode downlink signal be consistent with the corresponding information received in indoor simulation external field environment.Regulation experiment room core simultaneously Heart net, base station edition, configuration, ensure it is consistent with external field environment so that terminal can obtain indoors it is similar with outfield TD-LTE and GSM multi-modal environments.
Below in conjunction with attached drawing, the technical solution that each embodiment of the application provides is described in detail.
Fig. 1 is the flow diagram that multi-mode communication system simulates field testing method.The embodiment of the present application provides a kind of more Mould communication system simulation field testing method, includes the following steps:
Step 11 records multiple wireless communication systems in true field testing environment respectively using with reference to mobile terminal Signal is received, including signal strength and signal-to-noise ratio sampled value.
Preferably, the multiple wireless communication system, including TD-LTE system;The multiple wireless communication system, is also wrapped Containing gsm system.
It is further preferred that the true field testing environment includes multimode fixed-point environment and shiftable haulage line.
It is further preferred that the signal strength and signal-to-noise ratio sampled value, including RSRP that TD-LTE system defines and SINR;The signal strength and signal-to-noise ratio sampled value, including RSSI and SINR that gsm system defines.
Test needs at least two sets to refer to mobile terminal, sweep generator, computer and test software, for recording TD- respectively LTE network signal and record GSM network signal.It is described to refer to mobile terminal, including TD-LTE terminals and GSM terminals.Using institute It states with reference to mobile terminal respectively to TD-LTE networks and GSM network initiating business request.For example, FTP may be used in the sides TD-LTE The mode for dialing 10086 or reference terminal may be used in the mode of download, GSM side.Respectively record TD-LTE RSRP and SINR, GSM RSSI and SINR.
It should be noted that the multi-mode communication system of the application simulates field testing method, in the signal strength and letter It makes an uproar than the mute signal that in sampled value, removal GSM call intermittents are inserted into.(GSM RSSI exist in -110dBm or so, SINR 0dBm or so).
If the acquisition time point sequence of TD-LTE and GSM is expressed asWith θ0And θ1The total number of records of respectively TD-LTE and GSM, T0, T1Middle data item meets respectively TD-LTE SINR acquisitions information is expressed asRSRP acquisitions information is expressed asGSM is serviced The SINR acquisitions information of cell is expressed asRSSI acquisitions information is expressed as
Step 12 carries out interpolation processing to the data of the multiple wireless telecommunication system signal, realizes Data Integration.
TD-LTE and gsm system respectively sample, and it is generally different to measure record time point, it is therefore desirable to fill up by interpolation TD-LTE GSM sampling instants information, and fill up GSM TD-LTE sampling instants information.
Method is as follows:The record of TD-LTE and GSM can be expressed as following M0And M1Matrix:
Matrix M0And M1In each be classified as a record, the first behavior sampling time point.
Merge M with the sequence that the time is incremental0And M1In record, generate TD-LTE and GSM and integrate information matrix, signal is such as Under (the 1st row of acquiescence and last 1 is classified as TD-LTE sampled points, the 2nd is classified as GSM sampled points;Information position is not acquired to mend 0):
MatrixThe 1st behavior integration after sampling time point sequence, be expressed asTotal θ01, the 2,3 behavior TD-LTE information, the 4th, 5 behavior GSM informations, symbol h, k, p, q are index number, and symbol m, n respectively represent phase Adjacent TD-LTE recordsWithBetween be inserted into GSM record number and adjacent GSM recordWithBetween be inserted into TD-LTE record number.
Such asIt is shown, ifThe h articles record and the h+m+1 articles be recorded as two articles of adjacent TD-LTE sample recordsWithThenThe h+1 articles to record to the h+m articles record be GSM sampling instants, only GSM information needs M TD-LTE sample records are filled up over these locations,
The RSRP sample records wherein added are as follows:
The SINR sample records of addition are:
Similarly, if matrixKth item record and kth+n+1 items be recorded as two adjacent GSM sample records WithThenThe record of kth+1 to kth+n items record, only TD-LTE information needs to fill up corresponding n GSM Sample record.
Adding RSSI sample records is:
Adding SINR sample records is:
Step 13 indoors in test environment, exports the base station of the multiple wireless communication system with channel simulator Signal is handled, using the data creating channel files after integration, for control channel simulator output signal power and Noise figure makes the received signal power with reference to mobile terminal in channel simulator output end and the true field testing ring Received signal power in border is identical, make it is described with reference to mobile terminal channel simulator output end received signal to noise ratio with it is described Received signal to noise ratio in true field testing environment is identical.
Tables of data after integration is imported into computer, the executable channel files of channel simulator are write, to automatically control Fading channel changes so that LTE RSRP and GSM RSSI are identical as outfield or variation tendency is identical, while in order to ensure channel The SINR of simulator delivery outlet is consistent in the SINR of field testing with terminal, needs the AWGN that time-varying is added in channel files (additive white Gaussian noise).
According to the output power of the above multisystem and noise power Configuration Values, channel simulator executable file is write, and It is played out in channel simulator.
For TD-LTE system, forWherein symbol l is index number, if channel simulator exports Mouthful power initial value isIt is with reference to the TD-LTE RSRP received in mobile terminal indoors test environmentIt records in outfield TD-LTE RSRP areThen channel simulator delivery outlet power adjustment is:
After adjustment so that
It should be noted that by adjusting channel simulator delivery outlet power so that the LTE that indoor reception arrives With outfield LTEIt is identical.The LTE that indoor reception arrivesBy the delivery outlet power decision (dB of channel simulator Linear relationship), so by adjusting the delivery outlet power of channel simulator, it can adjust the LTE RSRP's that indoor reception arrives Value, and adjustment amount is exactlyWithDifference.To ensure that TD-LTE RSRP are consistent with outfield.
The noise power of addition is
WhereinFor noise power;It is 0 that noise power, which obeys mean value, and variance is equal toNormal state point Cloth.
For gsm system, since the receiver of GSM uses Time Domain Equalization techniques, while gsm system does not design cell phase Specific code word is closed, so useful signal or interference signal cannot be distinguished in GSM, GSM can be influenced on the AWGN of GSM channels addition The measured value of RSSI, it is therefore desirable to which co-design GSM fading channels and noise power ensure GSM RSSI and SINR and outfield one It causes or variation tendency is identical.The signal power of the delivery outlet of the channel simulator of GSMAnd noise powerRespectively
WhereinFor noise power;It is 0 that noise power, which obeys mean value, and variance is equal toNormal state point Cloth.
According to the output power of the above multisystem and noise power Configuration Values, channel simulator executable file is write, and It is played out in channel simulator.
It should be noted that the effect of channel simulator first is to establish channel model, specifically includes noise, multipath, declines Subtract, need to be implanted into channel files in channel simulator, channel files can carry out these channel parameters unified regulation and control, believe The relationship of road simulator output and input is exactly channel files control.Channel files determine the opposite variation tendency of signal, and There is other adjustable attenuation on channel simulator, the absolute magnitude of channel can be controlled, for example signal intensity trend is [1,2,3,4,5,3] (dB) has reformed into [3,4,5,6,7,5] (dB) after entirety+2 (dB), and opposite variation is by channel text Part controls, and for absolute magnitude by adjustable attenuation ,+2 operations here exactly adjust overall attenuation amount.It should also be noted that, requiring letter Road simulator downlink and uplink link stringent clock synchronizes, and ensures the heterogeneite of uplink and downlink channel.
It should also be noted that, present specification described in " make it is described with reference to mobile terminal in channel simulator output end Received signal power is identical as the received signal power in the true field testing environment, the mobile terminal that refers to is made to believe The received signal to noise ratio of road simulator output end is identical as the received signal to noise ratio in the true field testing environment " in " identical " Meaning is included in approximately the same in engineering practice.I.e. in error tolerance band, the reference mobile terminal is in channel simulation The received signal power of device output end is identical as the received signal power variation tendency in the true field testing environment, also belongs to Range represented by described in present specification " identical ".In error tolerance band, the reference mobile terminal is in channel mould The received signal to noise ratio of quasi- device output end is identical as the received signal to noise ratio variation tendency in the true field testing environment, also belongs to Range represented by " identical " described in present specification.
Step 14, the output end connection tested mobile terminal in the channel simulator, to the tested mobile terminal Performance is tested.
Different money test terminals carry out test job, and the result for testing verification includes:Average throughput, transmission accuracy, Cutting off rate, TD-LTE RSRP and SINR, GSM RSSI and SINR.The problem of to being found in test, carries out positioning analysis, repeats Verification, it is convenient that promotion is optimized to the performance of terminal.
Fig. 2 is the embodiment schematic diagram that multi-mode communication system is connect with mobile terminal under indoor test environment.The application is real A kind of multi-mode communication system simulation field testing method that example offer is provided, indoors under test environment, TD-LTE system and movement The connection method of terminal is:The main signal port of LTE base station and auxiliary signal port are combined by combiner respectively, respectively Input channel simulator forms 2 tunnel output signals after channel simulator 2 × 2MIMO Channel Processings, is respectively connected to move Two TD-LTE radio frequency receptions ports of terminal.
It is expressed as c1~c4 for the convenience of description, setting and connecting the input port of occupied channel simulator, accordingly Output port be represented sequentially as C1~C4, mobile terminal shares 3 ports (with reference to mobile terminal or tested mobile terminal), point Auxiliary signal RF receiving port u1, GSM signal RF of TD-LTE main signal radio frequency receiving ports u0, TD-LTE is not expressed as to receive Port u2.
As shown in Fig. 2, for TD-LTE system, the main signal port of the base stations TD-LTE and auxiliary signal port are distinguished first It is combined by combiner, is then attached to channel simulator, wherein main signal is connected to the ports c1, auxiliary to be signally attached to c2 Port, channel simulator generate one 2 × 2 mimo channel between c1, c2 and C1, C2, are represented by dashed line.Then, will The ports C1 and the ports u0 of mobile terminal connect, and the ports C2 and the ports u1 of reference terminal are connected.
Fig. 2 is also included as the schematic diagram that single antenna gsm system is connect with mobile terminal under indoor test environment.The application is real A kind of multi-mode communication system simulation field testing method that example offer is provided, indoors under test environment, gsm system and mobile terminal Connection method be:When the base station of gsm system is single antenna, the main signal of the base stations GSM is connected to channel simulator, is passed through 1 tunnel output signal is formed after channel simulator processing, is connected to the GSM signal RF receiving ports of mobile terminal.
In embodiment as shown in Figure 2, corresponding gsm system, if the base stations GSM do not use reception diversity, the i.e. base stations GSM to only have A piece antenna, then the base stations GSM output signal be connected to the ports c3 of channel simulator, then by the ports u2 of C3 and mobile terminal It is attached;
Fig. 3 is also included as double antenna gsm system and mobile terminal connection diagram under indoor test environment.The application is implemented A kind of multi-mode communication system that example provides simulates field testing method, indoors under test environment, gsm system and mobile terminal Connection method is:When the base station of gsm system is double antenna, the radiofrequency signal of the base stations GSM primary antenna and diversity antenna is distinguished Two input ports of channel simulator are connected to, form output letter in 1 tunnel after channel simulator 1 × 2MIMO Channel Processings Number, it is connected to the GSM radio frequency receptions port of mobile terminal.
In embodiment as shown in Figure 3, if the base stations GSM are using diversity is received, i.e., there are two antennas for the base stations GSM, then by GSM Base station primary antenna is connected to the ports c3, and diversity antenna is connected to the ports c4, and channel simulator generates between c3, c4 and C3 at this time One 1 × 2 mimo channel, is represented by dashed line, then the ports C3 is connected with the ports mobile terminal u2.
In the illustrated embodiments of Fig. 2~3, the mobile terminal is described with reference to mobile terminal or described tested mobile whole End.It is simplified shown as " reference terminal " with reference to mobile terminal in Fig. 2~3, scheme as shown in the figure is not only suitable for reference to mobile whole End, is also applied for tested mobile terminal.
The present invention proposes a kind of modeling and connection reappearing outfield TD-LTE and GSM multi-modal environment in laboratory environment Method is substituted the effective means of traditional outfield multimode test, tester can be allowed in laboratory ring using the method for the present invention Terminal performance similar with outfield drive test is investigated in border, to save time cost and human cost.Use the side of the present invention Method, test result are accurate, reproducible.Practical field testing is complicated and changeable, is easy by not true including weather, wagon flow, stream of people etc. Determine the interference of factor, therefore field testing results change is usually larger, and the equipment in virtual field testing platform, it is to pass through electricity Cable or optical fiber carry out wired connection, and signal is propagated reliable and stable;Letter by being write in the channel simulator that reruns simultaneously Road file ensure that in test every time and reappear identical channel fading characteristic, therefore the result is that accurate and reproducible.It uses The method of the present invention, registration analysis, optimizes convenient for terminal capabilities.In virtual driver test system, it is connected to true core Net and base station, and channel simulator can also receive the subjective regulation and control of operating personnel, therefore when pinpointing the problems in testing, both It can check that terminal capabilities shows by adjusting channel circumstance, it can also be by checking the signaling information of core-network side, it is fixed to assist Position problem, convenience and high-efficiency, and these are difficult to realize in field testing, especially commercial network.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, the present invention can be used in one or more wherein include computer usable program code computer The computer program production implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of product.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability Including so that process, method, commodity or equipment including a series of elements include not only those elements, but also wrap Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that wanted including described There is also other identical elements in the process of element, method, commodity or equipment.
Above is only an example of the present application, it is not intended to limit this application.For those skilled in the art For, the application can have various modifications and variations.It is all within spirit herein and principle made by any modification, equivalent Replace, improve etc., it should be included within the scope of claims hereof.

Claims (10)

1. a kind of multi-mode communication system simulates field testing method, which is characterized in that include the following steps:
Believed using the reception of TD-LTE system and gsm system in true field testing environment is recorded respectively with reference to mobile terminal Number, including signal strength and signal-to-noise ratio sampled value;
Signal strength and signal-to-noise ratio sampled value to the TD-LTE system and gsm system carry out interpolation processing, realize that data are whole It closes;
Indoors in test environment, the base station output signal of the TD-LTE system and gsm system is carried out with channel simulator Processing is used for the output signal power and noise figure of control channel simulator, is made using the data creating channel files after integration It is described with reference to mobile terminal in the received signal power of channel simulator output end and connecing in the true field testing environment Receipts signal power is identical, makes the received signal to noise ratio with reference to mobile terminal in channel simulator output end and the true outfield Received signal to noise ratio in test environment is identical;
Tested mobile terminal is connected in the output end of the channel simulator, the performance of the tested mobile terminal is surveyed Examination.
2. multi-mode communication system as described in claim 1 simulates field testing method, which is characterized in that
The signal strength and signal-to-noise ratio sampled value, including RSRP and SINR that TD-LTE system defines;
The signal strength and signal-to-noise ratio sampled value, including RSSI and SINR that gsm system defines.
3. multi-mode communication system simulates field testing method as described in claim 1~2 any one, which is characterized in that described The step of interpolation processing includes,
With incremental sequence integration TD-LTE and the GSM sample record of sampling instant, if the h articles record is recorded as with the h+m+1 articles Two adjacent TD-LTE sample recordsWithThe h+1 articles record to the h+m articles be recorded as GSM sampling note Record is then recorded at the h+1 articles to filling up m TD-LTE sample records on the h+m articles record position,
The RSRP sample records of addition are:
The SINR sample records of addition are:
Wherein, h, m, i are natural number, x0RSRP, y are defined for TD-LTE system0The SINR defined for TD-LTE system.
4. multi-mode communication system simulates field testing method as described in claim 1~2 any one, which is characterized in that described The step of interpolation processing includes,
With incremental sequence integration TD-LTE and the GSM sample record of sampling instant, if kth item record and kth+n+1 items are recorded as Two adjacent GSM sample recordsWith+ 1 record to kth+n item of kth is recorded as TD-LTE samplings Record;Corresponding n GSM sample record then is filled up on+1 record to+n record position of kth of kth,
The RSSI sample records of addition are:
The SINR sample records of addition are:
Wherein, k, n, p are natural number, x1For the RSSI that gsm system defines, y1The SINR defined for gsm system.
5. multi-mode communication system simulates field testing method as described in claim 1~2 any one, which is characterized in that control The TD-LTE signal powers of the channel simulator outputAnd noise powerRespectively:
Wherein, θ0And θ1The total number of records of reception signals of the respectively TD-LTE and GSM in true field testing environment, l is certainly So number;And x0Respectively refer to the TD-LTE system that mobile terminal receives in test environment and field testing environment indoors Defined RSRP,For channel simulator TD-LTE access initial state output powers;y0The SINR defined for TD-LTE system; N0For TD-LTE system noise power-value.
6. multi-mode communication system simulates field testing method as described in claim 1~2 any one, which is characterized in that control The GSM signal powers of the channel simulator outputAnd noise powerRespectively
Wherein, θ0And θ1The total number of records of reception signals of the respectively TD-LTE and GSM in true field testing environment, l is certainly So number;x1For the RSSI that gsm system defines, y1The SINR defined for gsm system.
7. multi-mode communication system simulates field testing method as described in claim 1~2 any one, which is characterized in that in room Under interior test environment, the connection type of TD-LTE system and mobile terminal is:
The main signal port of the base stations TD-LTE and auxiliary signal port are combined by combiner respectively, respectively input channel mould Quasi- device, forms 2 tunnel output signals after channel simulator 2 × 2MIMO Channel Processings, is respectively connected to the TD- of mobile terminal LTE main signal radio frequencies receiving port, auxiliary signal RF receiving port;
The mobile terminal is described with reference to mobile terminal or the tested mobile terminal.
8. multi-mode communication system as claimed in claim 7 simulates field testing method, which is characterized in that test environment indoors Under, the connection type of gsm system and mobile terminal is:
When the base station of gsm system is single antenna, the main signal of the base stations GSM is connected to channel simulator, by channel simulation Output signal all the way is formed after device processing, is connected to the GSM signal RF receiving ports of mobile terminal;
When the base station of gsm system is double antenna, the radiofrequency signal of the base stations GSM primary antenna and diversity antenna is connected respectively to letter Two input ports of road simulator, form 1 tunnel output signal after channel simulator 1 × 2MIMO Channel Processings, are connected to The GSM signal RF receiving ports of mobile terminal.
9. multi-mode communication system simulates field testing method as described in claim 1~2 any one, which is characterized in that described True field testing environment includes multimode fixed-point environment and shiftable haulage line.
10. multi-mode communication system simulates field testing method as described in claim 1~2 any one, which is characterized in that in institute It states in signal strength and signal-to-noise ratio sampled value, the mute signal that removal GSM call intermittents are inserted into.
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