CN101227693A - Apparatus and method of wireless links loopback test - Google Patents
Apparatus and method of wireless links loopback test Download PDFInfo
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- CN101227693A CN101227693A CNA2008100659526A CN200810065952A CN101227693A CN 101227693 A CN101227693 A CN 101227693A CN A2008100659526 A CNA2008100659526 A CN A2008100659526A CN 200810065952 A CN200810065952 A CN 200810065952A CN 101227693 A CN101227693 A CN 101227693A
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Abstract
The invention discloses a wireless link circulating test method and device thereof, the method comprises the following steps: inputting signals which are output by signal sources in receiving channels of equipment under test, doing down conversion treatment, sampling through an analog-to-digital converter, and leading a circulating processing unit to extract and filter, and circulating data to a launching channel, interpolating and filtering the data which are circulated by the circulating processing unit, and sending to the digital to analog converter, upconverting to radio-frequency signal, and sending to vector signal vector to analyze after demodulating through the launching channel. Since the wireless link circulating test method and device of the invention adopt a mode of circulating from a FPGA/DSP module and an apparatus is directly used to test link property, link checking which is achieved through complex baseband processing is avoided. The invention improves testing efficiency, greatly shortens developing periodic time, lowers system developing difficulty, and improves system reliability.
Description
Technical field
The present invention relates to method of testing and device in a kind of mobile communication technology, in particular, is a kind of method and device thereof of testing receive path function and performance with loop testing method.
Background technology
Along with the high speed development of wireless technology, radio communication product becomes necessary tool in people's routine work and the life gradually, in order to release product fast, and test and debugging wireless product fast.
Wireless product receives link at present two kinds of methods: a kind of BS of being (Base Station, the base station) with the terminal equipment joint test, come the performance of test products by terminal equipment, as shown in Figure 1, the terminal transmitting and receiving signal is to the receiving port of Devices to test, and received signal is through radio frequency reception channel, ADC (analog to digital converter), FPGA (field programmable logic chip), Baseband (base band), statistic property in base band; The shortcoming of these apparatus and method is could begin test after must waiting terminal equipment and base band all to finish, and can not quantitative analysis receive link performance, can not guarantee development progress in concurrent development, analysis link performance that can not be quantitative.
Another kind method is seen shown in Figure 2, is the receiving port of signal source transmitting and receiving signal to Devices to test, received signal process radio frequency reception channel, and ADC, FPGA, Baseband equipment is added up sensitivity in base band.The shortcoming of these apparatus and method be must etc. base band debugging finish after performance such as aptitude test sensitivity, can not locate the problem of link fast.
Therefore, there is defective in prior art, and awaits improving and development.
Summary of the invention
The object of the present invention is to provide a kind of method and device thereof of wireless links loopback test, testing radio equipment is judged channel performances such as radio frequency, intermediate frequency, ADC fast fast.
The present invention is by the following technical solutions:
A kind of method of wireless links loopback test, it comprises the steps:
The signal of A, signal source output is input to the receive path of Devices to test, carries out down-converted, and by analog to digital converter sampling, and the loop back processing being unit is used for extracting, filtering, and data ring is got back to transmission channel;
B, to carrying out interpolation, filtering from the data of described loop back processing being unit loopback, send to digital to analog converter, upconvert to radiofrequency signal, deliver to VSA by described transmission channel and carry out the demodulation post analysis.
Described method, wherein, described loop back processing being unit is the field programmable logic chip.
Described method, wherein, described loop back processing being unit is the DSP module.
Described method, wherein, described VSA is used to analyze the radio-frequency performance of measured signal, and described radio-frequency performance comprises link gain, EVM, flatness.
Described method, wherein, during described signal source input sensitivity signal, described VSA is used to analyze the sensitivity that obtains Devices to test.
Described method, wherein, when described signal source was launched the 802.16E modulation signal, described analog to digital converter was sampled to intermediate-freuqncy signal, wherein IF-FRE f
IFWith sample frequency f
SThe pass be
N is the counting natural number.
A kind of device of wireless links loopback test wherein, comprises the receive path, analog to digital converter, loop back processing being unit, digital to analog converter, the transmission channel that connect successively; Described receive path is used to connect the signal source of an outside; Described transmission channel connects the VSA of an outside; And a CPU, be connected with described loop back processing being unit; The radiofrequency signal to described receive path of being used for described loop back processing being unit extracts, filtering, and data ring is got back to transmission channel; Described CPU is used for the number of joining to receive path and transmission channel and analog to digital converter, digital to analog converter; Described transmission channel transmits to described VSA to obtain the performance of radio-frequency channel.
Described device, wherein, described analog to digital converter is used for the radiofrequency signal of described receive path is carried out down-converted; Described digital to analog converter is used for the loopback signal of described loop back processing being unit output is upconverted to radiofrequency signal.
Described device, wherein, described loop back processing being unit is the field programmable logic chip.
Described device, wherein, described loop back processing being unit is the DSP module.
Compared with prior art, the method of a kind of wireless links loopback test provided by the present invention and device thereof, owing to adopt mode from FPGA/DSP module loopback, with the direct test link performance of instrument, avoided realizing the detection of link, improved testing efficiency, shortened the construction cycle greatly by the Base-Band Processing of complexity, reduce the difficulty of system development, and improved the reliability of system.
Description of drawings
Fig. 1 is the structural representation that prior art directly adopts actual communication systems test link performance;
Fig. 2 is that prior art adopts Base-Band Processing to calculate the structural representation of link performance;
Fig. 3 be the present invention adopt come the schematic diagram of test link from the FPGA loopback.
Embodiment
Below in conjunction with accompanying drawing, will be described in more detail each preferred embodiment of the present invention.
In the method for wireless links loopback test of the present invention and the device thereof, as shown in Figure 3, comprise in its device: the receive path of Lian Jieing, ADC, loop back processing being unit (being FPGA or DSP module), DAC, transmission channel successively; Described receive path has connected the signal source of an outside, be used to receive the radiofrequency signal of outside source, described transmission channel has connected the VSA of an outside, be used for giving this VSA with emission of radio frequency signals, described signal source and described VSA are common by prior art, and be the external equipment of wired link loopback test device of the present invention, therefore repeat no more.
In the wired link loopback test device of the present invention, its main improvement is the CPU that described loop back processing being unit is set and is attached thereto, control to described receive path and described transmission channel by described CPU and to join number, and join number for described analog to digital converter and described digital to analog converter, and carry out the loop back processing being of signal, and without the bandwidth processing of outside by described loop back processing being unit.
Wherein said analog to digital converter is realized the down-converted of signal that described receive path is received, described loop back processing being unit can adopt described field programmable logic chip FPGA, perhaps DSP module, realization to down-conversion after the extraction and the filtration treatment of signal, and loopback is given described digital to analog converter; Described digital to analog converter is used for that the signal that loopback is exported is carried out upconversion process formation radiofrequency signal and sends to described transmission channel, sends to described VSA by described transmission channel.
Described VSA is realized the radiofrequency signal of launching of described transmission channel is carried out demodulation and calculating, judges with the performance that obtains the radio-frequency channel.
The method of wired link loopback test of the present invention realizes the loopback of receiving and transmitting signal in FPGA, CPU joins number for reception and transmission channel, and join number for ADC (analog to digital converter), DAC (digital to analog converter), described VSA carries out demodulation to signal and calculates, and obtains the performance of radio-frequency channel.
The inventive method is directly carrying out down-converted from the radiofrequency signal of receive path input, through the ADC sampling, in FPGA, extract, filtering, the IQ data ring is got back to transmission channel, through interpolation, filtering, deliver to DAC, deliver to VSA through the downlink passage again and carry out demodulation.
With the test of 802.16E device link is that example is illustrated wireless links loopback test method of the present invention.
As shown in Figure 3, method of testing of the present invention comprises:
Signal source emission 802.16E modulation signal is to the Devices to test test port, and the receive path of this Devices to test carries out down-conversion to the signal of input, and amplification then, intermediate frequency filtering are handled; ADC (analog to digital converter) samples to intermediate-freuqncy signal, and wherein the pass of IF frequency and sample frequency is
N can set in advance several class values for the counting natural number, and promptly Fs can adjust according to actual needs.
Data to sampling in FPGA extract, and filtering obtains the IQ signal.In the FPGA module, will receive the IQ data-in port that the IQ data of coming directly are looped back to transmission channel, in FPGA, the data of bringing be carried out interpolation filtering, deliver to DAC (digital to analog converter).The downlink radio frequency passage amplifies, filtering, upconverts to radiofrequency signal the signal that DAC comes out, and delivers to VSA and carries out demodulation.
The Board Power up of described VSA, load test program to veneer, just can obtain the radio-frequency performance such as link gain, EVM, flatness of measured signal by described VSA, when input signal is sensitivity signal, just can obtain the sensitivity of Devices to test.
The above-mentioned FPGA of the present invention can be substituted by the DSP module.
The method of wireless links loopback test of the present invention is owing to adopted from the mode of FPGA/DSP module loopback, with the direct test link performance of instrument, avoided realizing the detection of link by the Base-Band Processing of complexity, improved testing efficiency, shortened the construction cycle greatly, reduce the difficulty of system development, and improved the reliability of system.
Should be understood that above-mentioned description at preferred embodiment of the present invention is comparatively concrete, can not therefore be interpreted as the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (10)
1. the method for a wireless links loopback test, it comprises the steps:
The signal of A, signal source output is input to the receive path of Devices to test, carries out down-converted, and by analog to digital converter sampling, and the loop back processing being unit is used for extracting, filtering, and data ring is got back to transmission channel;
B, to carrying out interpolation, filtering from the data of described loop back processing being unit loopback, send to digital to analog converter, upconvert to radiofrequency signal, deliver to VSA by described transmission channel and carry out the demodulation post analysis.
2. method according to claim 1 is characterized in that, described loop back processing being unit is the field programmable logic chip.
3. method according to claim 1 is characterized in that, described loop back processing being unit is the DSP module.
4. method according to claim 1 is characterized in that described VSA is used to analyze the radio-frequency performance of measured signal, and described radio-frequency performance comprises link gain, EVM, flatness.
5. method according to claim 1 is characterized in that, during described signal source input sensitivity signal, described VSA is used to analyze the sensitivity that obtains Devices to test.
6. method according to claim 1 is characterized in that, when described signal source was launched the 802.16E modulation signal, described analog to digital converter was sampled to intermediate-freuqncy signal, wherein IF-FRE f
IFWith sample frequency f
SThe pass be
N is the counting natural number.
7. the device of a wireless links loopback test is characterized in that, comprises the receive path, analog to digital converter, loop back processing being unit, digital to analog converter, the transmission channel that connect successively; Described receive path is used to connect the signal source of an outside; Described transmission channel connects the VSA of an outside; And a CPU, be connected with described loop back processing being unit; The radiofrequency signal to described receive path of being used for described loop back processing being unit extracts, filtering, and data ring is got back to transmission channel; Described CPU is used for the number of joining to receive path and transmission channel and analog to digital converter, digital to analog converter; Described transmission channel transmits to described VSA to obtain the performance of radio-frequency channel.
8. device according to claim 7 is characterized in that, described analog to digital converter is used for the radiofrequency signal of described receive path is carried out down-converted; Described digital to analog converter is used for the loopback signal of described loop back processing being unit output is upconverted to radiofrequency signal.
9. device according to claim 8 is characterized in that, described loop back processing being unit is the field programmable logic chip.
10. device according to claim 8 is characterized in that, described loop back processing being unit is the DSP module.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100659526A CN101227693A (en) | 2008-01-17 | 2008-01-17 | Apparatus and method of wireless links loopback test |
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| CNA2008100659526A CN101227693A (en) | 2008-01-17 | 2008-01-17 | Apparatus and method of wireless links loopback test |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761380A (en) * | 2011-04-29 | 2012-10-31 | 中国移动通信集团公司 | Determining method of link loss value and radio remote unit (RRU) |
| CN102957486A (en) * | 2011-08-22 | 2013-03-06 | 北京佳讯飞鸿电气股份有限公司 | Method for testing signal transmitting and receiving performance of DSP (digital signal processor) |
| CN103023002A (en) * | 2012-11-22 | 2013-04-03 | 国网智能电网研究院 | Digital IGBT (Insulated Gate Bipolar Transistor) series connection voltage-sharing circuit based on look-up table |
| CN103929340A (en) * | 2014-04-18 | 2014-07-16 | 浪潮电子信息产业股份有限公司 | Method for analyzing FPGA link parameters |
| CN105281852A (en) * | 2015-10-30 | 2016-01-27 | 四川九洲电器集团有限责任公司 | L-band test equipment and test method |
| CN105897350A (en) * | 2016-04-22 | 2016-08-24 | 北京联盛德微电子有限责任公司 | Method and apparatus for testing transmitter chip |
| US10243595B2 (en) | 2015-07-09 | 2019-03-26 | Sanechips Technology Co. Ltd. | Detection method and device for digital intermediate frequency processing system, and computer storage medium |
| CN110932777A (en) * | 2019-11-27 | 2020-03-27 | 中电科仪器仪表(安徽)有限公司 | Multi-channel 5G base station testing device and testing method |
| CN111050265A (en) * | 2019-11-27 | 2020-04-21 | 深圳易科声光科技股份有限公司 | Automatic audio link detection method and device |
| CN114499708A (en) * | 2020-10-27 | 2022-05-13 | 罗森伯格技术有限公司 | System and method for testing radio remote unit |
| CN117639973A (en) * | 2023-12-12 | 2024-03-01 | 广州润芯信息技术有限公司 | Method, system and device for testing transceiver chip |
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2008
- 2008-01-17 CN CNA2008100659526A patent/CN101227693A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761380B (en) * | 2011-04-29 | 2014-12-31 | 中国移动通信集团公司 | Determining method of link loss value and radio remote unit (RRU) |
| CN102761380A (en) * | 2011-04-29 | 2012-10-31 | 中国移动通信集团公司 | Determining method of link loss value and radio remote unit (RRU) |
| CN102957486A (en) * | 2011-08-22 | 2013-03-06 | 北京佳讯飞鸿电气股份有限公司 | Method for testing signal transmitting and receiving performance of DSP (digital signal processor) |
| CN102957486B (en) * | 2011-08-22 | 2015-05-06 | 北京佳讯飞鸿电气股份有限公司 | Method for testing signal transmitting and receiving performance of DSP (digital signal processor) |
| CN103023002A (en) * | 2012-11-22 | 2013-04-03 | 国网智能电网研究院 | Digital IGBT (Insulated Gate Bipolar Transistor) series connection voltage-sharing circuit based on look-up table |
| CN103023002B (en) * | 2012-11-22 | 2015-11-11 | 国网智能电网研究院 | A kind of digital IGBT series average-voltage circuit based on look-up table |
| CN103929340A (en) * | 2014-04-18 | 2014-07-16 | 浪潮电子信息产业股份有限公司 | Method for analyzing FPGA link parameters |
| CN103929340B (en) * | 2014-04-18 | 2018-04-17 | 广东浪潮大数据研究有限公司 | A kind of analysis method of FPGA link parameters |
| US10243595B2 (en) | 2015-07-09 | 2019-03-26 | Sanechips Technology Co. Ltd. | Detection method and device for digital intermediate frequency processing system, and computer storage medium |
| CN105281852A (en) * | 2015-10-30 | 2016-01-27 | 四川九洲电器集团有限责任公司 | L-band test equipment and test method |
| CN105281852B (en) * | 2015-10-30 | 2018-06-01 | 四川九洲电器集团有限责任公司 | A kind of L-band test equipment and test method |
| CN105897350A (en) * | 2016-04-22 | 2016-08-24 | 北京联盛德微电子有限责任公司 | Method and apparatus for testing transmitter chip |
| CN110932777A (en) * | 2019-11-27 | 2020-03-27 | 中电科仪器仪表(安徽)有限公司 | Multi-channel 5G base station testing device and testing method |
| CN111050265A (en) * | 2019-11-27 | 2020-04-21 | 深圳易科声光科技股份有限公司 | Automatic audio link detection method and device |
| CN114499708A (en) * | 2020-10-27 | 2022-05-13 | 罗森伯格技术有限公司 | System and method for testing radio remote unit |
| CN114499708B (en) * | 2020-10-27 | 2024-06-21 | 普罗斯通信技术（苏州）有限公司 | System and method for testing remote radio unit |
| CN117639973A (en) * | 2023-12-12 | 2024-03-01 | 广州润芯信息技术有限公司 | Method, system and device for testing transceiver chip |
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Open date: 20080723 |