CN101127574A - A line loss measurement method based on measurement value of mobile phone receiving signal intensity - Google Patents
A line loss measurement method based on measurement value of mobile phone receiving signal intensity Download PDFInfo
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- CN101127574A CN101127574A CNA2007101539669A CN200710153966A CN101127574A CN 101127574 A CN101127574 A CN 101127574A CN A2007101539669 A CNA2007101539669 A CN A2007101539669A CN 200710153966 A CN200710153966 A CN 200710153966A CN 101127574 A CN101127574 A CN 101127574A
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- mobile phone
- signal intensity
- line loss
- value
- radio frequency
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Abstract
The utility model discloses a line loss measurement method based on the strength measurement value of mobile phone received signals, belonging to the technical field of mobile communication. Based on acquiring standard line loss value SA, the method also comprises: setting the downlink signal strength of a comprehensive measurement instrument as RA, reading out the strength measurement value of mobile phone received signals RmA after establishing the communication between the comprehensive measurement instrument and the mobile phone through standard radio frequency cable; setting the downlink signal strength of the comprehensive measurement instrument as RB, reading out the strength measurement value of mobile phone received signals RmB after establishing the communication between the comprehensive measurement instrument and the mobile phone through calibrating radio frequency cable in product line; calculating the line loss value SB of calibrating radio frequency cable in product line as: SB=SA+(RmA-RmB)-(RA-RB). The utility model calculates the line loss value through the strength measurement value of mobile phone received signals with high precision, thus ensures the precision of the line loss value; at the same time, the measurement method of the utility model is more convenient.
Description
Technical field
The invention belongs to the mobile communication technology field, relate in particular to a kind of line loss measurement method based on measurement value of mobile phone receiving signal intensity.
Background technology
In the production process of mobile phone, all need accurately to learn the line loss value of radio frequency cable for power and the isoparametric calibration of inner-loop power control.For the line loss value of radio frequency cable, common way has following two kinds:
(1) experience valuation;
(2) measure by vector network analyzer or frequency spectrograph.
Obviously there is significant errors in above-mentioned first method, and second method is because the environment for use complexity, and inconvenience is applied in the operation of production line.Therefore, need to propose a kind of accurately method of easy test line loss value.
Summary of the invention
Technical problem to be solved by this invention is a kind of line loss measurement method based on measurement value of mobile phone receiving signal intensity to be provided, thereby accurately to test out the line loss value easily.
In order to address the above problem, the invention provides, a kind of line loss measurement method based on measurement value of mobile phone receiving signal intensity is obtaining normal line cable damage value S
AThe basis on, may further comprise the steps:
A1: it is R that comprehensive test instrument downstream signal intensity is set
A, and after setting up communication between comprehensive test instrument and the mobile phone by the standard radio frequency cable, read measurement value of mobile phone receiving signal intensity Rm
A
A2: it is R that comprehensive test instrument downstream signal intensity is set
B, and after setting up communication between comprehensive test instrument and the mobile phone by the mutatis mutandis radio frequency cable of production line lieutenant colonel, read measurement value of mobile phone receiving signal intensity Rm
B
B: calculate the line loss value S of production-line calibration with the radio frequency cable
BFor: S
B=S
A+ (Rm
A-Rm
B)-(R
A-R
B).
In the above-mentioned method, steps A 1, A2 are simultaneously or operate sequentially.
Among steps A 1, the A2, the comprehensive test instrument downstream signal intensity R of setting
A, R
BWhen equating, then calculate the line loss value S of production-line calibration among the step B with the radio frequency cable
BFor: S
B=S
A+ (Rm
B-Rm
A).
The comprehensive test instrument downstream signal intensity R of She Zhiing wherein
A, R
BValue be-25dbm is between-the 95dbm.
The inventive method calculates the line loss value by the measured value of the higher mobile phone receiving signal intensity of precision, thereby has guaranteed line loss value accuracy, and method of measurement of the present invention is more easy simultaneously.
Description of drawings
Fig. 1 measures flow chart for the line loss of the embodiment 1 of employing technical solution of the present invention;
Fig. 2 is the particular flow sheet of step 102a in the flow process shown in Figure 1;
Fig. 3 is the particular flow sheet of step 102b in the flow process shown in Figure 1.
Embodiment
Main design of the present invention is to combine for calibration and survey good mobile phone, at calibration power R
ONear, data value and its received signal intensity level of its analog-to-digital conversion ADC or automatic ride gain AGC are linear, as shown in Equation (1):
R
m=KM+M
0Formula (1)
In the formula, Rm is the received signal intensity level, and K is the measuring accuracy of ADC or AGC, and M is the measured value of ADC or AGC, M
0Be the initial signal intensity level.
When using the radio frequency cable to set up being connected of mobile phone and comprehensive test instrument,, the comprehensive test instrument transmitting power is S, then above-mentioned mobile phone receiving signal intensity R if being R, radio frequency line cable damage
mWith the relation of mobile phone test quantization error E as shown in Equation (2):
R=S+R
m+ E formula (2)
In the formula ,-K/2＜E＜K/2.
Can learn by formula (2), when using the standard cable to set up being connected of mobile phone and comprehensive test instrument, the physical relationship of mobile phone receiving signal intensity and mobile phone test quantization error as shown in Equation (3):
R
A=S
A+ Rm
A+ E
AFormula (3)
In the formula, the transmitting power of comprehensive test instrument is R
A, the normal line cable decreases and is S
A, mobile phone receiving signal intensity is Rm
A, the mobile phone test quantization error is E
A
Use to produce when setting up being connected of mobile phone and comprehensive test instrument with the radio frequency cable, the physical relationship of mobile phone receiving signal intensity and mobile phone test quantization error as shown in Equation (4):
R
B=S
B+ Rm
B+ E
BFormula (4)
In the formula, the transmitting power of comprehensive test instrument is R
B, producing with radio frequency line cable damage is S
B, mobile phone receiving signal intensity is Rm
B, the mobile phone test quantization error is E
B
Then obtain producing the line loss value S that uses the radio frequency cable by formula (3), (4)
BAs shown in Equation (5):
S
B=S
A+ (Rm
A-Rm
B)-(R
A-R
B)+(E
A-E
B) formula (5)
In the formula ,-k＜(E
A-E
B)＜k.
For ADC or AGC data value, k＜0.1, and the measuring accuracy of the measurement of line loss is 0.1, and quantization error is an events of equal probability, mathematical expectation is 0, so under the prerequisite of the measuring accuracy that can guarantee line loss, obtain to produce the line loss value S that uses the radio frequency cable by formula (6)
B:
S
B=S
A+ (Rm
A-Rm
B)-(R
A-R
B) (formula 6).
Below in conjunction with accompanying drawing the technical solution used in the present invention is described in further detail.
The line loss that Figure 1 shows that the embodiment that adopts technical solution of the present invention is measured flow chart, may further comprise the steps:
Step 101: use vector network analyzer to measure the line loss value S of a standard cable A
A
Step 102a, comprehensive test instrument downstream signal intensity R is set
A, and set up communicating to connect between comprehensive test instrument and the mobile phone by standard cable A, under standby status of mobile phone, read measurement value of mobile phone receiving signal intensity Rm
A
Step 102b: comprehensive test instrument downstream signal intensity R is set
B, and set up communicating to connect between comprehensive test instrument and the mobile phone by the mutatis mutandis radio frequency cable of production line lieutenant colonel B, under standby status of mobile phone, read measurement value of mobile phone receiving signal intensity Rm
B
The comprehensive test instrument downstream signal intensity R that is provided with among above-mentioned steps 102a, the 102b
A, R
BPreferable range be-25dBm～-95dBm, for example R
A, R
BCan be set to-30dBm ,-45dBm or-80dBm etc.
Step 103, according to following formula, calculate the line loss value S of production-line calibration with the radio frequency cable
B:
S
B＝S
A+(Rm
A-Rm
B)-(R
A-R
B)。
The comprehensive test instrument downstream signal intensity R that is provided with among above-mentioned steps 102a, the 102b
A, R
BWhen equating, be preferred version, this moment, production-line calibration was shown below with the line loss value of radio frequency cable:
S
B＝S
A+(Rm
B-Rm
A)。
The 102a of step described in the said method, 102b can simultaneously or successively operate.
Wherein step 102a is further divided into following steps, as shown in Figure 2:
A1: it is R that comprehensive test instrument downstream signal intensity is set
A
A2: will set up communication between comprehensive test instrument and the mobile phone by standard radio frequency cable A, and mobile phone is in holding state;
A3: read mobile phone signal intensity measurements Rm this moment
A
Step 102b is further divided into following steps, as shown in Figure 3:
B1: it is R that comprehensive test instrument downstream signal intensity is set
B
B2: B will set up communication between comprehensive test instrument and the mobile phone by the mutatis mutandis radio frequency cable of production line lieutenant colonel, and mobile phone is in holding state;
B3: read mobile phone signal intensity measurements Rm this moment
B
The foregoing description calculates the line loss value of producing with the radio frequency cable by the measured value of the higher mobile phone receiving signal intensity of precision, thereby has guaranteed the accuracy of line loss value, and this method of measurement is simple and easy to do simultaneously, can be used in the operation of production line.
Certainly, above-mentioned specific embodiment is not the further qualification to technical solution of the present invention, and any those of ordinary skill in the art replaced or corresponding improvement the technology of the present invention feature being equal to of being done, still within protection scope of the present invention.
Claims (4)
1. the line loss measurement method based on measurement value of mobile phone receiving signal intensity is characterized in that, is obtaining normal line cable damage value S
AThe basis on, may further comprise the steps:
A1: it is R that comprehensive test instrument downstream signal intensity is set
A, and after setting up communication between comprehensive test instrument and the mobile phone by the standard radio frequency cable, read measurement value of mobile phone receiving signal intensity Rm
A
A2: it is R that comprehensive test instrument downstream signal intensity is set
B, and after setting up communication between comprehensive test instrument and the mobile phone by the mutatis mutandis radio frequency cable of production line lieutenant colonel, read measurement value of mobile phone receiving signal intensity Rm
B
B: calculate the line loss value S of production-line calibration with the radio frequency cable
BFor: S
B=S
A+ (Rm
A-Rm
B)-(R
A-R
B).
2. the method for claim 1 is characterized in that, described steps A 1, A2 are simultaneously or operate sequentially.
3. method as claimed in claim 1 or 2 is characterized in that, among described steps A 1, the A2, and the comprehensive test instrument downstream signal intensity R of setting
A, R
BWhen equating, then calculate the line loss value S of production-line calibration among the step B with the radio frequency cable
BFor: S
B=S
A+ (Rm
B-Rm
A).
4. method as claimed in claim 3 is characterized in that, the comprehensive test instrument downstream signal intensity R of setting
A, R
BValue be-25dbm is between-the 95dbm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101539669A CN101127574B (en) | 2007-09-18 | 2007-09-18 | A line loss measurement method based on measurement value of mobile phone receiving signal intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101539669A CN101127574B (en) | 2007-09-18 | 2007-09-18 | A line loss measurement method based on measurement value of mobile phone receiving signal intensity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101127574A true CN101127574A (en) | 2008-02-20 |
| CN101127574B CN101127574B (en) | 2011-04-20 |
Family
ID=39095512
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101539669A Expired - Fee Related CN101127574B (en) | 2007-09-18 | 2007-09-18 | A line loss measurement method based on measurement value of mobile phone receiving signal intensity |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105933034A (en) * | 2016-04-22 | 2016-09-07 | 广东欧珀移动通信有限公司 | Line loss measurement method and device |
| CN106053957A (en) * | 2016-07-28 | 2016-10-26 | 上海斐讯数据通信技术有限公司 | Test fixture line loss test method and test fixture line loss test system |
| CN106658561A (en) * | 2016-11-15 | 2017-05-10 | 上海电机学院 | WIFI device repetition measurement calibration method |
| CN109150242A (en) * | 2018-08-24 | 2019-01-04 | 北京小米移动软件有限公司 | Test the method and device of line loss |
| CN109212450A (en) * | 2018-09-21 | 2019-01-15 | 北京小米移动软件有限公司 | The detection method and device of power loss in test macro |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359819C (en) * | 2003-06-21 | 2008-01-02 | 中兴通讯股份有限公司 | Line loss automatic compensation system and method for active indoor distributed system |
| JP4318595B2 (en) * | 2004-06-16 | 2009-08-26 | 富士通株式会社 | Mobile terminal |
| EP1624593A1 (en) * | 2004-08-05 | 2006-02-08 | Alcatel | Optical distribution network monitoring method and system |
-
2007
- 2007-09-18 CN CN2007101539669A patent/CN101127574B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105933034A (en) * | 2016-04-22 | 2016-09-07 | 广东欧珀移动通信有限公司 | Line loss measurement method and device |
| CN105933034B (en) * | 2016-04-22 | 2019-02-01 | Oppo广东移动通信有限公司 | A kind of line loss measurement method and device |
| CN106053957A (en) * | 2016-07-28 | 2016-10-26 | 上海斐讯数据通信技术有限公司 | Test fixture line loss test method and test fixture line loss test system |
| CN106658561A (en) * | 2016-11-15 | 2017-05-10 | 上海电机学院 | WIFI device repetition measurement calibration method |
| CN109150242A (en) * | 2018-08-24 | 2019-01-04 | 北京小米移动软件有限公司 | Test the method and device of line loss |
| CN109150242B (en) * | 2018-08-24 | 2021-09-07 | 北京小米移动软件有限公司 | Method and device for testing line loss |
| CN109212450A (en) * | 2018-09-21 | 2019-01-15 | 北京小米移动软件有限公司 | The detection method and device of power loss in test macro |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101127574B (en) | 2011-04-20 |
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Granted publication date: 20110420 Termination date: 20160918 |