CN101510806A - Method and apparatus for testing total omnidirectional sensitivity of transmit-receive cofrequency mobile terminal - Google Patents
Method and apparatus for testing total omnidirectional sensitivity of transmit-receive cofrequency mobile terminal Download PDFInfo
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Abstract
The invention provides a method for detecting total isotropic sensitivity of a mobile terminal with a same frequency for receiving and sending, which comprises the following steps: equivalent isotropic radiant power EIRP measurement is carried out to the mobile terminal at a plurality of spatial positions so as to obtain a plurality of EIRP measuring value of the spatial positions; equivalent isotropic sensitivity EIS measurement is carried out to the mobile terminal at one spatial position among the spatial positions so as to obtain an EIS measuring value of the one spatial position; EIS calculation values of the corresponding spatial positions are respectively calculated according to the EIS measuring value of the one spatial position and the EIRP measuring value of at least one part; and the total isotropic sensitivity TIS of the mobile terminal is obtained according to the EIS measuring value and the EIS calculation value. The method can realize rapid and accurate TIS testing.
Description
Technical field
The present invention relates to the wireless receiving and dispatching performance test of portable terminal, relate in particular to a kind of portable terminal total omnidirectional sensitivity (TIS) method of testing and device of transmit-receive cofrequency.
Background technology
The wireless receiving of portable terminal, transmission performance are the important indicators of network access testing.Standard according to cellular telecommunication network association (CTIA), on the sphere that with the measured piece is the centre of sphere, measure transmit signal strength, receiving sensitivity on several locus, then the test result COMPREHENSIVE CALCULATING is provided a single index, be used to weigh the wireless receiving and dispatching performance of portable terminal.
Test for emitting performance, 15 ° of equivalent isotropically radiated power (EIRP that do 2 polarization in the every interval of CTIA standard code for example, Effective Isotropic Radiated Power) measure, be total to 24*11=264 locus, each locus point is surveyed 2 polarised directions; All test result COMPREHENSIVE CALCULATING are obtained total radiant power (TRP, Total Radiated Power).For the test of receptivity, 30 ° at every interval is done the equivalent omnidirectional sensibilities (EIS, Effective IsotropicSensitivity) of 2 polarization and is measured, totally 60 locus, 120 sensitivity tests; All test result COMPREHENSIVE CALCULATING are provided the total omnidirectional sensitivity (TIS, Total IsotropicSensitivity) of a single index.According to the CTIA regulation, each frequency range will be tested 3 channels, for the multiband mobile phone, then will test all frequency ranges.Certainly, the interval of space measurement position more little (being that measurement point is many more) then can carefully more weigh the respective performances index of measured piece accurately, but the measurement of TIS is slow, and the space interval of measuring is bigger at interval than the space measurement of TRP usually.
This shows that the measurement of TRP and TIS expends time in very much.Especially the TIS of testing mobile terminal receptivity test is owing to need relate to the test of the error rate, and the test of the error rate is more consuming time with respect to power measurement, so the test of TIS be often more consuming time at each locus point measurement sensitivity.
Yet in such as the research and development of portable terminals such as mobile phone, network access testing, need carry out the measurement of a large amount of TRP/TIS, test speed can make test become bottleneck slowly, thereby reduces the efficient of research and development and network access testing.
Summary of the invention
Purpose of the present invention is intended to one of solve the aforementioned problems in the prior at least.
For this reason, embodiments of the invention propose the method and apparatus that a kind of total omnidirectional sensitivity TIS that can finish the portable terminal of transmit-receive cofrequency fast and accurately tests.
According to an aspect of the present invention, the total omnidirectional sensitivity method of testing of the portable terminal of the transmit-receive cofrequency of the embodiment of the invention, may further comprise the steps: a) portable terminal is carried out equivalent isotropically radiated power EIRP and measure, to obtain a plurality of equivalent isotropically radiated power measured values of corresponding described a plurality of locus in a plurality of locus; B) equivalent omnidirectional sensibility EIS measurement is carried out to portable terminal in a locus in described a plurality of locus, to obtain the equivalent omnidirectional sensibility EIS measured value of a corresponding described locus; C), calculate the equivalent omnidirectional sensibility EIS calculated value that obtains corresponding locus respectively according to the equivalent omnidirectional sensibility EIS measured value of a described locus and the equivalent isotropically radiated power EIRP measured value of at least a portion; And d), obtains the total omnidirectional sensitivity TIS of portable terminal according to equivalent omnidirectional sensibility EIS measured value and equivalent omnidirectional sensibility EIS calculated value.
According to the further embodiment of the embodiment of the invention, described step c calculates described equivalent omnidirectional sensibility calculated value: EIS according to following formula
j=EIS_b-(EIRP
j-EIRP_b), wherein, j is used for representing the numbering of corresponding described a plurality of locus different spatial, EIS
jBe the equivalent omnidirectional sensibility calculated value of corresponding locus, EIRP
jBe the equivalent isotropically radiated power measured value of corresponding locus, EIS_b is the described equivalent omnidirectional sensibility measured value of a corresponding described locus, and EIRP_b represents the equivalent isotropically radiated power measured value of a corresponding described locus.
According to the further embodiment of the embodiment of the invention, described steps d is calculated described total omnidirectional sensitivity TIS according to following formula:
Wherein, θ and φ represent to carry out two polarised directions that the described equivalent isotropically radiated power EIRP of portable terminal measures or described equivalent omnidirectional sensibility EIS measures respectively, M represents to measure or the corresponding five equilibrium quantity of predetermined space angle on the θ polarised direction of described equivalent omnidirectional sensibility EIS measurement with described equivalent isotropically radiated power EIRP, N represents to measure or the corresponding five equilibrium quantity of predetermined space angle on the φ polarised direction of described equivalent omnidirectional sensibility EIS measurement (θ with described equivalent isotropically radiated power EIRP
i, φ
j) expression portable terminal the locus, EIS
θ(θ
i, φ
j) representation space position (θ
i, φ
j) the equivalent omnidirectional sensibility of the θ polarised direction located, EIS
φ(θ
i, φ
j) representation space position (θ
i, φ
j) the equivalent omnidirectional sensibility of the φ polarised direction located.
According to a further aspect in the invention, embodiments of the invention propose a kind of total omnidirectional sensitivity testing apparatus of portable terminal of transmit-receive cofrequency, comprise: first measurement module, be used for portable terminal being carried out equivalent isotropically radiated power EIRP and measure, to obtain a plurality of equivalent isotropically radiated power EIRP measured values of corresponding described a plurality of locus in a plurality of locus; Second measurement module is used in a locus of described a plurality of locus portable terminal being carried out equivalent omnidirectional sensibility EIS and measures, to obtain the equivalent omnidirectional sensibility EIS measured value of a corresponding described locus; First computing module according to the equivalent omnidirectional sensibility EIS measured value of a described locus and the equivalent isotropically radiated power EIRP measured value of at least a portion, calculates respectively and obtains corresponding equivalent omnidirectional sensibility EIS calculated value; And second computing module, according to equivalent omnidirectional sensibility EIS measured value and equivalent omnidirectional sensibility EIS calculated value, obtain the total omnidirectional sensitivity TIS of portable terminal.
Present invention is directed to the system of transceiver channel same frequency, after recording TRP, utilize the portable terminal emitting performance to test the EIRP of a plurality of locus that obtain, and the EIS measured value that obtains of the EIS of locus test, can finish the receptivity TIS test of portable terminal fast and accurately.Compare with present TIS test, method of testing of the present invention and device are not only simple and convenient, and have improved test speed and efficient greatly.In addition, the present invention can obtain the corresponding more EIS in multiposition space and come COMPREHENSIVE CALCULATING TIS, therefore has higher precision.
In addition, by quick, accurately TIS test of the present invention.Can make things convenient for the research staff to measure fast and accurately, improve the efficient of network access testing.Simultaneously, should be noted that, use method of the present invention, when test obtains TIS, recorded TRP, that is to say that transmitting-receiving performance TRP, the TIS of mobile phone carried out complete measurement.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the flow chart of steps of the total omnidirectional sensitivity EIS method of testing of the portable terminal of transmit-receive cofrequency of the present invention;
Fig. 2 is the coordinate parameters implication of portable terminal air interface (OTA) test; And
Fig. 3 is the system block diagram of the total omnidirectional sensitivity EIS testing apparatus of the portable terminal of transmit-receive cofrequency of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
At first with reference to figure 1, Fig. 1 is the flow chart of steps of total omnidirectional sensitivity (TIS, the Total Isotropic Sensitivity) method of testing of the portable terminal of transmit-receive cofrequency of the present invention.As shown in the figure, this method may further comprise the steps: in a plurality of locus portable terminal is carried out equivalent isotropically radiated power (EIRP, Effective Isotropic Radiated Power) measures, to obtain a plurality of equivalent isotropically radiated power EIRP measured values (step 102) of corresponding described a plurality of locus; Equivalent omnidirectional sensibility (EIS is carried out to portable terminal in a locus in described a plurality of locus, Effective IsotropicSensitivity) measures, to obtain the equivalent omnidirectional sensibility EIS measured value (step 104) of a corresponding described locus; According to the equivalent omnidirectional sensibility EIS measured value of a described locus and the equivalent isotropically radiated power EIRP measured value of at least a portion, calculate the equivalent omnidirectional sensibility EIS calculated value (step 106) that obtains corresponding locus respectively; And, obtain the total omnidirectional sensitivity TIS (step 108) of portable terminal according to equivalent omnidirectional sensibility EIS measured value and equivalent omnidirectional sensibility EIS calculated value.
To provide detailed description to each step respectively below.In step 102, can utilize the emitting performance test mode of existing C TIA standard, portable terminal be carried out the EIRP measurement, thereby obtain each equivalent isotropically radiated power measured value of corresponding locus in a plurality of locus.According to the CTIA standard code, be positioned at portable terminal shown in Figure 2 on air interface (OTA) test sphere of sphere center position, on θ as shown in Figure 2 and the φ polarised direction, on the locus that whole test sphere is divided with predetermined angle intervals, the EIPR that can carry out above-mentioned two polarised directions measures.For example CTLA is defined in θ, Φ and carries out EIRP every 15 ° locus and measure, but in the specific implementation, can certainly adopt littler interval angle to divide the locus and carry out corresponding EIRP and measure.Here, EIRP measures corresponding locus, be the locus that the whole test sphere of Fig. 2 is divided with predetermined space, and the EIRP value by corresponding spatial position measuring, can COMPREHENSIVE CALCULATING obtain characterizing the total radiant power (TRP) of portable terminal emitting performance.
In step 104, EIS is carried out in locus of portable terminal measure, obtain corresponding EIS measured value.Here EIS measures the regulation that a corresponding locus can be the existing CTIA of employing, in θ, Φ locus every 30 ° division, also can carry out 15 ° of locus dividing correspondence at interval that EIRP measures according to step 102, can also be the locus that obtains less than 30 ° of intervals according to other.But, no matter what interval angle to divide the sphere of portable terminal transmitting-receiving performance test with, here carry out that EIS measures that a corresponding locus needs and step 102 in EIRP one of them locus of measuring corresponding a plurality of locus overlap, promptly to measure corresponding locus be that above-mentioned EIRP measures one of them in a plurality of locus of correspondence to this EIS.Hereinafter will provide explanation after a while about this point.
By above-mentioned steps, can obtain the EIS measured value of a corresponding locus and a plurality of EIRP measured values of many measurement space positions of corresponding EIRP.The all or part of EIS calculated value that can obtain corresponding space respectively by this EIS measured value and a plurality of EIPR measured values.
Provide below in conjunction with Fig. 2 and to specify, portable terminal is positioned at the centre of sphere of Fig. 2 spheroid, certain locus (θ on the sphere, Φ) expression, EIS θ (θ i, Φ j) representation space position (θ i, the equivalent omnidirectional sensibility of the θ polarised direction of Φ j) locating, the equivalent omnidirectional sensibility of the Φ polarised direction that EIS Φ (θ i, Φ j) representation space position (θ i, Φ j) is located.In the narration hereinafter, for the sake of simplicity, certain locus is represented with single subscript.
If the equivalent omnidirectional sensibility of any two locus is EISj, EISk, j, k are used for representing the numbering of corresponding different spatial here, then:
EISj＝R_Sen-Gain_j，
Wherein R_Sen is a radiosusceptibility, and R_sen does not change with spatial position change, and Gain_j is the gain of antenna in this locus direction.
Therefore, EISj-EISk=(R_Sen-Gain_j)-(R_Sen-Gain_k)
＝Gain_k-Gain_j (1)
That is, the equivalent omnidirectional sensibility of any two locus is represented with relation such as formula 1 between the corresponding gain.
If the equivalent isotropically radiated power of any two locus is EIRPj, EIRPk, similarly j, k are used for representing the numbering of corresponding different spatial, then:
EIRPj＝Power_cond+Delta+Gain_j，
Wherein Power_cond is the conduction transmitting power of mobile terminal antenna, and Delta adds the actual emission power of power amplifier behind the antenna load and the difference of conduction transmitting power, and Gain_j is the gain of antenna in this locus direction.Wherein, Power_cond and Delta do not change with spatial position change.
Therefore, EIRPj-EIRPk=(Power_cond+Delta+Gain_j)-(Power_cond+Delta+Gain_k)
＝Gain_j-Gain_k (2)
That is, the equivalent isotropically radiated power of any two locus is represented with relation such as formula 2 between the corresponding gain.
The derivation of wherein above formula (1) and (2) has all been considered correct compensating for path loss.
Because what the present invention is directed to is to receive and send to adopt the same frequency channel system, so can obtain following equation in conjunction with formula 1 and 2:
EISj-EISk＝Gain_k-Gain_j＝-(EIRPj-EIRPk) (3)
According to formula (3) as can be known, the difference of the EIS of any two locus equals the difference negate (emission receives same frequency, and path compensation is the same) of the EIRP of these two positions.
By formula 3, and the equivalent omnidirectional sensibility measured value that obtains respectively of step 104 and 102 and the equivalent isotropically radiated power measured value of at least a portion, the equivalent omnidirectional sensibility calculated value that obtains other locational space correspondences can be calculated respectively.
If utilize the EIRP measured value of whole locational spaces of 15 ° of interval measurements of CTIA regulation, can obtain the EIS calculated value in equal number correspondence position space according to formula 3, certainly except the EIS measured value that has measured in the step 104.As described in the prior art, carrying out EIRP in this case measures 264 locus should be arranged.If utilize a part of EIRP measured value of whole locational spaces of 15 ° of interval measurements of CTIA regulation, this part EIRP measured value can with 30 ° of the CTIA standard at interval EIS to measure locus corresponding on whole test sphere corresponding one by one, promptly from the EIRP measured value of 264 locus correspondences, select the measured value of 60 locus correspondences, certainly the locus of the EIRP measured value correspondence of selecting is to be benchmark with EIS measurement space position in the step 104, spaced apart with 30 ° between the locus mutually on the whole test sphere.Perhaps, according to the angle of carrying out the locus that EIRP measure to divide, it is corresponding that this part EIRP measured value and other of selection meet the corresponding locus of the EIS measurement of CTIA standard-required.
Like this, step 106 can obtain and respective amount locus equivalent one to one omnidirectional sensibility EIS calculated value.Next, step 108 is according to the equivalent omnidirectional sensibility EIS measured value of an above-mentioned locus correspondence and the equivalent omnidirectional sensibility EIS calculated value of other locational space correspondences, and according to the TIS defined formula of stipulating in the CTIA portable terminal OTA measurement standard, thereby the total omnidirectional sensitivity TIS of acquisition portable terminal.
The TIS defined formula is as follows:
Wherein, θ and φ implication are as shown in Figure 2, expression is carried out portable terminal and is carried out two polarised directions that EIRP measures or EIS measures respectively, M represents to measure or the corresponding five equilibrium quantity of predetermined space angle on the θ polarised direction of EIS measurement with EIRP, and N represents to measure or the corresponding five equilibrium quantity of predetermined space angle on the φ polarised direction of EIS measurement with EIRP.
Therefore, by 264 EIS values that above-mentioned corresponding 264 locus with EIRP obtain, it can identically all be 15 ° that the corresponding predetermined space angle of EIS measurement is at this moment measured corresponding predetermined space angle with EIRP; Or with 60 EIS values that the locus is corresponding, at this moment, EIS measures corresponding predetermined space angle (30 °) can measure corresponding predetermined space angle (15 °) greater than EIRP; Perhaps other meet the EIS value that the CTIA standard-required obtains respective amount, for example EIRP measures with 1 θ ° interval and divides locus on the test sphere, EIS measures can be at the locus of 20 ° or 30 ° correspondences, and carry out comprehensive computing, thereby can obtain to represent the TIS value of portable terminal receptivity by formula 4.
It is to be noted, the EIS measurement is measured corresponding respectively predetermined space angle with EIRP and is not limited to above-mentioned specific embodiment, under the situation that satisfies the CTIA standard-required, the locational space corresponding according to the EIS measurement of predetermined space angular divisions exists the part and whole coincidence of satisfying the TIS test request to get final product with space, EIRP measuring position during practical operation.
Adopt above-mentioned simple test method can obtain TIS thus.And utilize said method, after recording TRP, the EIS test of only carrying out a locus just can obtain TIS, and needn't have the EIS test of 60 locus of CTIA regulation now.Thereby compare present TIS test, the present invention can shorten the testing time 60 times, has improved test speed greatly.In addition, if utilize the EIRP value in the more multiposition space (for example 264) of TIS test, the present invention can obtain the corresponding more EIS in multiposition space and come COMPREHENSIVE CALCULATING TIS.Compare to have now and determine TIS according to 60 EIS values, the present invention can have higher precision.
Now, please refer to Fig. 3, this figure is the system block diagram of total omnidirectional sensitivity (TIS) testing apparatus of the portable terminal of transmit-receive cofrequency of the present invention.
As shown in the figure, TIS testing apparatus of the present invention comprises first measurement module 22, second measurement module 24, first computing module 26 and second computing module 28.Wherein first measurement module 22 is used in a plurality of locus portable terminal being carried out the equivalent isotropic radiated power (EIRP) measurement, to obtain a plurality of equivalent isotropically radiated power EIRP measured values of corresponding a plurality of locus; Second measurement module 24 is used in a locus of described a plurality of locus portable terminal being carried out equivalent omnidirectional sensibility (EIS) to be measured, to obtain the equivalent omnidirectional sensibility EIS measured value of a corresponding described locus; First computing module 26 calculates respectively and obtains corresponding equivalent omnidirectional sensibility EIS calculated value according to described equivalent omnidirectional sensibility EIS measured value and at least a portion equivalent isotropically radiated power EIRP measured value; And second computing module 28 according to equivalent omnidirectional sensibility EIS measured value and equivalent omnidirectional sensibility EIS calculated value, obtain the total omnidirectional sensitivity TIS of portable terminal.
Below, the operation principle to each module is respectively provided detailed description.First measurement module 33 can utilize existing C TIA standard to carry out the emitting performance test, in a plurality of locus portable terminal is carried out the EIRP measurement, thereby obtains each equivalent isotropically radiated power measured value of corresponding locus.For example on θ shown in Figure 2 and φ polarised direction, the EIPR that carries out above-mentioned two polarised directions on the locus that whole test sphere is divided with predetermined angle intervals measures.Here, predetermined angle intervals for example is 15 ° of CTLA regulation, also can adopt littler interval angle.
The EIS measurement is carried out in locus of 24 pairs of portable terminals of second measurement module, obtains corresponding EIS measured value.It can be on a locus of the regulation correspondence that adopts existing CTIA that the EIS of second measurement module, 24 execution here measures, for example θ, Φ are every the locus of 30 ° division, also can carry out 15 ° of locus dividing correspondence at interval that EIRP measures according to first measurement module 22, can also be the locus that obtains less than 30 ° of intervals according to other.But, no matter what interval angle to divide the sphere of portable terminal transmitting-receiving performance test with, here second measurement module 24 carries out the locus that EIS measures correspondence, need and first measurement module 22 is carried out one of them locus that EIRP measure corresponding a plurality of locus and overlapped, promptly to measure corresponding locus be to measure a plurality of locus of correspondence one of them from above-mentioned EIRP to this EIS.Hereinafter will provide explanation after a while about this point.
By first measurement module 22 and second measurement module 24, can obtain the EIS measured value of a corresponding locus and a plurality of EIRP measured values of many measurement space positions of corresponding EIRP respectively.26 of first computing modules pass through all or part of of this EIS measured value and a plurality of EIPR measured values, obtain the EIS calculated value in corresponding space respectively.
According to OTA test coordinate schematic diagram shown in Figure 2, portable terminal is positioned at the centre of sphere of Fig. 2 spheroid, certain locus (θ on the sphere, Φ) expression, EIS θ (θ i, Φ j) representation space position (θ i, the equivalent omnidirectional sensibility of the θ polarised direction of Φ j) locating, the equivalent omnidirectional sensibility of the Φ polarised direction that EIS Φ (θ i, Φ j) representation space position (θ i, Φ j) is located.For the sake of simplicity, certain locus is represented with single subscript in the narration hereinafter.
If the equivalent omnidirectional sensibility of any two locus is EISj, EISk, j, k are used for representing the numbering of corresponding different spatial here, then:
EISj＝R_Sen-Gain_j，
Wherein R_Sen is a radiosusceptibility, and R_sen does not change with spatial position change, and Gain_j is the gain of antenna in this locus direction.
Therefore, EISj-EISk=(R_Sen-Gain_j)-(R_Sen-Gain_k)
＝Gain_k-Gain_j (5)
That is, the equivalent omnidirectional sensibility of any two locus is represented with relation such as formula 5 between the corresponding gain.
If the equivalent isotropically radiated power of any two locus is EIRPj, EIRPk, similarly j, k are used for representing the numbering of corresponding different spatial, then:
EIRPj＝Power_cond+Delta+Gain_j，
Wherein Power_cond is the conduction transmitting power of mobile terminal antenna, and Delta adds the actual emission power of power amplifier behind the antenna load and the difference of conduction transmitting power, and Gain_j is the gain of antenna in this locus direction.Wherein, Power_cond and Delta do not change with spatial position change.
Therefore, EIRPj-EIRPk=(Power_cond+Delta+Gain_j)-(Power_cond+Delta+Gain_k)
＝Gain_j-Gain_k (6)
That is, the equivalent isotropically radiated power of any two locus is represented with relation such as formula 6 between the corresponding gain.
The derivation of wherein above formula (5) and (6) has all been considered correct compensating for path loss.
Because what the present invention is directed to is to receive and send to adopt the same frequency channel system, so can obtain following equation in conjunction with formula 5 and 6:
EISj-EISk＝Gain_k-Gain_j＝-(EIRPj-EIRPk) (7)
According to formula 7 as can be known, the difference of the EIS of any two locus equals the difference negate (emission receives same frequency, and path compensation is the same) of the EIRP of these two positions.
Equivalent omnidirectional sensibility EIS measured value that obtains respectively according to first measurement module 22 and second measurement module 24 and the equivalent isotropically radiated power EIRP measured value of at least a portion, first computing module 26 utilizes formula 3, can calculate the equivalent omnidirectional sensibility EIS calculated value that obtains other locational space correspondences respectively.
If utilize the EIRP measured value of whole locational spaces of 15 ° of interval measurements of CTIA regulation, can obtain the EIP calculated value in equal number correspondence position space according to formula 3 first computing modules 26, except the EIP measured value that certain second measurement module 24 has measured.As described in the prior art, carrying out EIRP in this case measures 264 locus should be arranged.If utilize a part of EIRP measured value of whole locational spaces of 15 ° of interval measurements of CTIA regulation, this part EIRP measured value can with 30 ° of the CTIA standard at interval EIS to measure locus corresponding on whole test sphere corresponding one by one, i.e. 60 locus.Perhaps, according to the angle of carrying out the locus that EIRP measure to divide, it is corresponding that this part EIRP measured value and other of selection meet the corresponding locus of the EIS measurement of satisfying the TIS test of CTIA standard-required.
Like this, first computing module 26 can obtain and the equivalent one to one omnidirectional sensibility calculated value in respective amount locus.Next, second computing module 28 is according to the equivalent omnidirectional sensibility EIS measured value of an above-mentioned locus correspondence and the equivalent omnidirectional sensibility EIS calculated value of other locational space correspondences, and according to the TIS defined formula of stipulating in the CTIA portable terminal OTA measurement standard, thereby can obtain the total omnidirectional sensitivity TIS of portable terminal.
The TIS defined formula is shown in top formula 4, and therefore, by 264 EIS values that above-mentioned corresponding 264 locus with EIRP obtain, it can identically all be 15 ° that the corresponding predetermined space angle of EIS measurement is at this moment measured corresponding predetermined space angle with EIRP; Or with 60 EIS values that the locus is corresponding, at this moment, EIS measures corresponding predetermined space angle (30 °) can measure corresponding predetermined space angle (15 °) greater than EIRP; Perhaps other meet the EIS value that the CTIA standard-required is met the respective amount of TIS test, and carry out comprehensive computing by second computing module in conjunction with formula 4, thereby can obtain to represent the TIS value of portable terminal receptivity.
It is to be noted, the EIS measurement is measured corresponding respectively predetermined space angle with EIRP and is not limited to above-mentioned specific embodiment, under the situation that satisfies the CTIA standard-required, the locational space corresponding according to the EIS measurement of predetermined space angular divisions exists the part and whole coincidence of satisfying the TIS test request to get final product with space, EIRP measuring position during practical operation.
Can obtain TIS simply and easily by above-mentioned testing apparatus thus.And utilize this testing apparatus after recording TRP, the EIS test of only carrying out a locus just can obtain TIS, and needn't have the EIS test of 60 locus of CTIA regulation now.Thereby compare present TIS test, the present invention can shorten the testing time 60 times, has improved test speed greatly.In addition, if utilize the EIRP value in the more multiposition space (for example 264) of TIS test, the present invention can obtain the corresponding more EIS in multiposition space and come COMPREHENSIVE CALCULATING TIS.Compare to have now and determine TIS according to 60 EIS values, the present invention can have higher precision.
The present invention proposes a kind of method for rapidly testing and device of mobile terminal radio frequency transmitting-receiving performance, especially is directed to the system of transceiver channel same frequency, and the present invention can finish the receptivity TIS test of portable terminal fast and accurately.Therefore can improve the efficient of research and development greatly, make things convenient for the research staff to measure fast and accurately, improve the efficient of network access testing.
The same frequency channel system here comprises 3-G (Generation Three mobile communication system) TD-SCDMA, and this system adopts TDD mode (TDD), receives and transmission work is at same frequency channels, and separates with different working time slots and to be received in transmitting channel.The present invention is applicable to that also other receive, send the system (such as WLAN (wireless local area network) WiFi) that adopts the same frequency channel.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (10)
1. the total omnidirectional sensitivity method of testing of the portable terminal of a transmit-receive cofrequency is characterized in that, said method comprising the steps of:
A) in a plurality of locus portable terminal is carried out equivalent isotropically radiated power EIRP and measure, to obtain a plurality of EIRP measured values of corresponding described a plurality of locus;
B) equivalent omnidirectional sensibility EIS measurement is carried out to portable terminal in a locus in described a plurality of locus, to obtain the EIS measured value of a corresponding described locus;
C) according to the EIS measured value of a described locus and the EIRP measured value of at least a portion, calculate the EIS calculated value of corresponding locus respectively; And
D), obtain the total omnidirectional sensitivity TIS of portable terminal according to described EIS measured value and described EIS calculated value.
2. total omnidirectional sensitivity method of testing as claimed in claim 1 is characterized in that, described step c calculates described EIS calculated value according to following formula:
EIS
j＝EIS_b-(EIRP
j-EIRP_b)，
Wherein, j is used for representing the numbering of corresponding described a plurality of locus different spatial, EIS
jBe the EIS calculated value of corresponding locus, EIRP
jBe the EIRP measured value of corresponding locus, EIS_b is the described EIS measured value of a corresponding described locus, and EIRP_b represents the EIRP measured value of a corresponding described locus.
3. total omnidirectional sensitivity method of testing as claimed in claim 1 or 2 is characterized in that, described steps d is calculated described total omnidirectional sensitivity TIS according to following formula:
Wherein, θ and φ represent to carry out two polarised directions that the described EIRP of portable terminal measures or described EIS measures respectively, M represents to measure or the corresponding five equilibrium quantity of predetermined space angle on the θ polarised direction of described EIS measurement with described EIRP, N represents to measure or the corresponding five equilibrium quantity of predetermined space angle on the φ polarised direction of described EIS measurement (θ with described EIRP
i, φ
j) expression portable terminal the locus, EIS
θ(θ
i, φ
j) representation space position (θ
i, φ) the equivalent omnidirectional sensibility of the θ polarised direction located, EIS
φ(θ
i, φ
j) representation space position (θ
i, φ
j) the equivalent omnidirectional sensibility of the φ polarised direction located.
4. total omnidirectional sensitivity method of testing as claimed in claim 2 is characterized in that, described formula obtains by following steps:
According to equivalent omnidirectional sensibility and radiosusceptibility and mobile terminal antenna relation in the gain of corresponding locus direction, the relation between the equivalent omnidirectional sensibility that obtains any two locus in described a plurality of locus and the corresponding gain;
According to the conduction transmitting power of equivalent isotropically radiated power and mobile terminal antenna, actual emission power and in the relation of the gain of corresponding locus direction, the relation between the equivalent isotropically radiated power that obtains any two locus in described a plurality of locus and the corresponding gain; And
According to the relation between the equivalent isotropically radiated power of the relation between the equivalent omnidirectional sensibility of described any two locus and the corresponding gain and described any two locus and corresponding the gain, the relation between the equivalent omnidirectional sensibility that obtains any two locus and the equivalent isotropically radiated power of corresponding described any two locus.
5. total omnidirectional sensitivity method of testing as claimed in claim 3 is characterized in that, it is identical that described EIS measures the corresponding predetermined space angle of corresponding predetermined space angle and described EIRP measurement.
6. total omnidirectional sensitivity method of testing as claimed in claim 3 is characterized in that, described EIS measures corresponding predetermined space angle and measures corresponding predetermined space angle greater than described EIRP.
7. the total omnidirectional sensitivity testing apparatus of the portable terminal of a transmit-receive cofrequency is characterized in that, comprising:
First measurement module is used in a plurality of locus portable terminal being carried out equivalent isotropically radiated power EIRP and measures, to obtain a plurality of EIRP measured values of corresponding described a plurality of locus;
Second measurement module is used in a locus of described a plurality of locus portable terminal being carried out equivalent omnidirectional sensibility EIS and measures, to obtain the EIS measured value of a corresponding described locus;
First computing module according to the EIS measured value of a described locus and the EIRP measured value of at least a portion, calculates the EIS calculated value of corresponding locus respectively; And
Second computing module according to described EIS measured value and described EIS calculated value, obtains the total omnidirectional sensitivity TIS of portable terminal.
8. total omnidirectional sensitivity testing apparatus as claimed in claim 7 is characterized in that, described first computing module calculates described EIS calculated value according to following formula:
EIS
j＝EIS_b-(EIRP
j-EIRP_b)，
Wherein, j is used for representing the numbering of corresponding described a plurality of locus different spatial, EIS
jBe the EIS calculated value of corresponding locus, EIRP
jBe the EIRP measured value of corresponding locus, EIS_b is the described EIS measured value of a corresponding described locus, and EIRP_b represents the EIRP measured value of a corresponding described locus.
9. as claim 7 or 8 described total omnidirectional sensitivity testing apparatuss, it is characterized in that described second computing module calculates described TIS according to following formula:
Wherein, θ and φ represent to carry out two polarised directions that the described EIRP of portable terminal measures or described EIS measures respectively, M represents to measure or the corresponding five equilibrium quantity of predetermined space angle on the θ polarised direction of described EIS measurement with described EIRP, N represents to measure or the corresponding five equilibrium quantity of predetermined space angle on the φ polarised direction of described EIS measurement (θ with described EIRP
i, φ
j) expression portable terminal the locus, EIS θ (θ
i, φ
j) representation space position (θ
i, φ
j) the equivalent omnidirectional sensibility of the θ polarised direction located, EIS φ (θ
i, φ
j) representation space position (θ
i, φ
j) the equivalent omnidirectional sensibility of the φ polarised direction located.
10. total omnidirectional sensitivity testing apparatus as claimed in claim 9 is characterized in that, it is identical that described EIS measures the corresponding predetermined space angle of corresponding predetermined space angle and described EIRP measurement.
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