CN102014413B - System and method for testing radio frequency (RF) of long term evolution (LTE) base station - Google Patents
System and method for testing radio frequency (RF) of long term evolution (LTE) base station Download PDFInfo
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Abstract
The embodiment of the invention discloses a system and method for testing radio frequency (RF) of a long term evolution (LTE) base station. The system comprises a signal generator, a spectrum analyzer, a control personal computer (PC), an internal local area network (LAN), a circulator, an RF switch, a remote radio unit (RRU) and an auxiliary control unit. The signal generator, the spectrum analyzer, the control PC, the circulator, the RF switch, the RRU and the sub-control unit are connected to the internal LAN by network cables and used for interacting orders and data by the internal LAN. According to the embodiment of the application, automatic RF test demands of an LTE system can be met.
Description
Technical field
The present invention relates to the measuring technology of the communications field, particularly relate to radio frequency test system and the method for a kind of LTE base station.
Background technology
Existing LTE (Long Term Evolution, Long Term Evolution) E-NodeB (Evolved NodeB, the B node of evolution) distributed frames that adopt more, distributed base station refers to BBU (the Base BandUnit of base station, base station processing unit) and RRU (Remote Radio Unit, Remote Radio Unit) a kind of base station mode separated as module independently and that link to each other by optical fiber separately.Wherein, RRU mainly realizes the functions such as radio-frequency (RF) transceiver, and power amplifier.In actual use, in order to guarantee Systems balanth, need to carry out radio frequency testing to RRU.
From the content of test, radio frequency testing mainly comprises transmitter radio frequency testing and receiver radio frequency test.The transmitter radio frequency testing is that the downstream signal index that the transmitter of base station is launched is tested, and the downstream signal index comprises that transmitting power, modulation quality, busy channel bandwidth, spectral emission template, side channel leak than, spuious and code territory error etc.Receiver radio frequency test be to base station receiver under given conditions receptivity test, specifically comprise dynamic range test, reference sensitivity test, adjacent-channel selectivity, obstruction, intermodulation and the reception error rate of testing such as spuious.
From the implementation of test, radio frequency testing generally comprises manual testing and automatically test, and the automation of the radio frequency testing target pursued of each major company of industry just.At present, some companies have also developed automatic test control software that can be commercial.But, along with the increase of mobile subscriber to the high-speed data service demand, and OFDM (Orthogonal Frequency Division Multiplexing, OFDM) application of technology in mobile communication technology, LTE is progressively ripe and commercial as the 4th third-generation mobile communication technology of main flow.LTE has used (the Code Division Multiple Access with CDMA, the code division multiple access access) the diverse air interface of technology, but at descending employing OFDMA (Orthogonal Frequency Division Multiple Access, orthogonal frequency division multiple access) technology, SC-FDMA (single carrier Frequency DivisionMultiple Access in up employing peak-to-average force ratio optimization, the multiplexing multiple access access of single carrier frequency division) technology, in addition, different from communication system in the past, LTE has also introduced MIMO (Multiple-Input Multiple-Out-put, multiple-input and multiple-output) technology.Because the particularity of LTE system and the new technology of employing are used in the past automatic test approach and Auto-Test System, can not satisfy the new demand of LTE system.
For example, in patent CN 101183900A, provide a kind of method and system that the RRU of WCDMA in the 3G technology and TD-SCDMA is tested automatically.But, owing to introduced the MIMO technology in the LTE technology, also need to consider the demand that the radio-frequency (RF) index of many antennas is tested.Obviously, indiscriminately imitate the testing requirement that original method of testing and test macro can't have been realized the LTE system.
Summary of the invention
In order to solve the problems of the technologies described above, the embodiment of the invention provides radio frequency test system and the method for a kind of LTE base station, to satisfy the automation radio frequency testing demand of LTE system.
The embodiment of the invention discloses following technical scheme:
The radio frequency test system of a kind of LTE base station, comprise: signal generator, spectrum analyzer, control PC, internal lan, circulator, radio-frequency (RF) switch, radio frequency remote unit RRU and Auxiliary Control Element, wherein, described control PC, be used for issuing control command to spectrum analyzer, signal generator, radio-frequency (RF) switch, RRU and Auxiliary Control Element by internal lan; Described signal generator is used for opening under the control of control PC, produces the required radiofrequency signal of receiver radio frequency test; Described spectrum analyzer is used for opening under the control of control PC, and the baseband signal that receives is carried out the indicator transmitter test; Described circulator, the radio signal transmission that is used for the signal generator is produced be to radio-frequency (RF) switch, and the radio signal transmission on the radio-frequency antenna port that radio-frequency (RF) switch is selected is to spectrum analyzer; Described radio-frequency (RF) switch is used for switching to different radio-frequency antenna ports under the control of control PC, in order to the radio-frequency (RF) index of different radio-frequency antenna ports is tested; Described RRU, be used under the control of control PC, the data that radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection is carried out on the receiver link are processed, and the baseband signal after will processing by Optical Fiber Transmission to Auxiliary Control Element, the data that the baseband signal of Auxiliary Control Element generation is carried out on the transmitter chain are processed, and the radiofrequency signal after will processing sends to radio-frequency (RF) switch; Described Auxiliary Control Element, be used under the control of control PC, produce required external frame triggering signal and the reference clock signal of signal generator, and, the triggering signal that frequency spectrum generator is required, the baseband signal that RRU is sent is transmitted to control PC, sends to RRU with self producing baseband signal by optical fiber.
A kind of receiver radio frequency method of testing that realizes based on radio frequency test system comprises: control PC sends control command control Auxiliary Control Element by internal lan and produces required external frame triggering signal and the reference clock signal of signal generator; Control PC sends control command control signal generator by internal lan and opens, and produces the required radiofrequency signal of receiver radio frequency test, so that the radio signal transmission that circulator produces the signal generator is to radio-frequency (RF) switch; Control PC sends control command control radio-frequency (RF) switch by internal lan and switches on the radio-frequency antenna port of appointment; Control PC sends the data that the radiofrequency signal on the radio-frequency antenna port that control command control RRU selects radio-frequency (RF) switch carries out on the receiver link by internal lan and processes, and the baseband signal after will processing by Optical Fiber Transmission to Auxiliary Control Element; Control PC is transmitted to control PC by the baseband signal that internal lan transmission control command control Auxiliary Control Element sends RRU.
A kind of transmitter radio frequency test method of realizing based on radio frequency test system comprises: control PC sends control command control Auxiliary Control Element by internal lan and produces the required triggering signal of spectrum analyzer; Control PC sends control command control Auxiliary Control Element by internal lan the baseband signal that self produces is sent to RRU by optical fiber; Control PC processes by the data that internal lan transmission control command control RRU carries out on the transmitter chain the baseband signal that receives, and the radiofrequency signal after will processing sends to radio-frequency (RF) switch; Control PC sends control command control radio-frequency (RF) switch by internal lan and switches on the radio-frequency antenna port of appointment, so that the radio signal transmission on the radio-frequency antenna port that circulator is selected radio-frequency (RF) switch is to spectrum analyzer; Control PC sends control command control spectrum analyzer by internal lan, and the radiofrequency signal that receives is carried out the indicator transmitter test.
As can be seen from the above-described embodiment, the invention has the beneficial effects as follows:
Method of testing of the present invention and system have solved the error that the manual test method is brought, so that the radio-frequency (RF) index characteristic conforms truth of base station.Simultaneously, not only can save testing cost, and can save the testing time, this method also can be tested the RRU equipment of many antennas, provides a feasible scheme for the RF index of testing base station.Also be applicable to the radio frequency testing of many antennas.
By Long-distance Control and ethernet technology, the radio-frequency (RF) index of the testing base station of automation, take full advantage of the test instrumentation resource in laboratory, set up flexibly test environment, develop simple program control, realize automatic test, save the man power and material, can shorten the time of test, can correctly reflect the RF characteristic of base station, satisfy the requirement to the base station radio-frequency index test.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of an embodiment of the radio frequency test system of a kind of LTE of the application base station;
Fig. 2 is a structural representation of the application's Auxiliary Control Element;
Fig. 3 is the structural representation of another embodiment of the radio frequency test system of a kind of LTE of the application base station;
Fig. 4 is the structural representation of another embodiment of the radio frequency test system of a kind of LTE of the application base station;
Fig. 5 is the flow chart of an embodiment of the receiver radio frequency method of testing that realizes based on radio frequency test system among a kind of embodiment one of the application;
Fig. 6 is the flow chart of another embodiment of the receiver radio frequency method of testing that realizes based on radio frequency test system among a kind of embodiment one of the application;
Fig. 7 is the flow chart of an embodiment of the transmitter radio frequency test method of realizing based on radio frequency test system among a kind of embodiment one of the application;
Fig. 8 is the flow chart of an embodiment of the transmitter radio frequency test method of realizing based on radio frequency test system among a kind of embodiment one of the application.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Embodiment one
See also Fig. 1, it is the structural representation of an embodiment of the radio frequency test system of a kind of LTE of the application base station.As shown in Figure 1, this system comprises: control PC101, internal lan 102, Auxiliary Control Element 103a, radio frequency remote unit RRU 103b, radio-frequency (RF) switch 103d, circulator 103e, spectrum analyzer 103f and signal generator 103g, wherein,
Control PC101 is used for issuing control command to spectrum analyzer 103f, signal generator 103g, radio-frequency (RF) switch 103d, RRU103b and Auxiliary Control Element 103a by internal lan 102;
Wherein, internal lan 102 is comprised of a plurality of Ethernet switches.Signal generator 103f, spectrum analyzer 103g, control PC101, radio-frequency (RF) switch 103d, Auxiliary Control Element 103a and RRU103b are connected on the internal lan 102 by netting twine, so that control PC101 sends control command by internal lan 102, control signal generator 103f, spectrum analyzer 103g, radio-frequency (RF) switch 103d, Auxiliary Control Element 103a and RRU103b carry out the task of appointment.
Wherein, the signal generator is mainly realized the fixed reference channel (Fixedreference channels, FRC) of receiver radio frequency test defined, and the fixed reference channel comprises FRC A1 and FRC A2.
Wherein, spectrum analyzer is mainly realized the demodulation of LTE signal.
As shown in Figure 1, in peace the embodiment of the present application, the signal generator links to each other with the input 1 of circulator by radio frequency cable, and spectrum analyzer links to each other with the output 3 of circulator by radio frequency cable, and the output 2 of circulator links to each other with radio-frequency (RF) switch by radio frequency cable.
Radio-frequency (RF) switch 103d is used for switching to different radio-frequency antenna ports under the control of control PC101, in order to the radio-frequency (RF) index of different radio-frequency antenna ports is tested;
RRU103b, be used under the control of control PC101, the data that radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch 103d selection is carried out on the receiver link are processed, and the radiofrequency signal after will processing by Optical Fiber Transmission to Auxiliary Control Element 103a, the data that the baseband signal of Auxiliary Control Element 103a generation is carried out on the transmitter chain are processed, and the radiofrequency signal after will processing sends to radio-frequency (RF) switch 103d;
Wherein, RRU is the equipment under test of radio frequency testing, and transmitter radio frequency testing and receiver radio frequency test index all realize in RRU.
In the receiver radio frequency test, the data processing that RRU carries out on the receiver link the radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection specifically comprises: filtering, low noise amplification, further RF small signals amplification filtering and down-conversion, analog-to-digital conversion and Digital IF Processing.
In the transmitter radio frequency testing, the data processing that the baseband signal that RRU produces Auxiliary Control Element is carried out on the transmitter chain specifically comprises: frequency conversion, filtering and amplification.
The receiver radio frequency test result of RRU can be observed figure and preserves from backstage LMT, and the transmitter radio frequency testing result of RRU can read and shows from the radio frequency analyzer, and preserves.
Auxiliary Control Element 103a, be used under the control of control PC101, produce required external frame triggering signal and the reference clock signal of signal generator 103g, and, the triggering signal that frequency spectrum generator 103f is required, the baseband signal that RRU103b is sent is transmitted to control PC101, sends to RRU103b with self producing baseband signal by optical fiber.
Wherein, see also Fig. 2, it is a structural representation of the application's Auxiliary Control Element.As shown in Figure 2, Auxiliary Control Element 103a further comprises: control and management module 103a1, test model data transmission module 103a2, optical interface module 103a3, clock module 103a4 and base band demodulating module 103a5, wherein,
Clock module 103a4 for generation of signal generator 103g required external frame triggering signal and reference clock signal, produces the required triggering signal of frequency spectrum generator 103f;
Wherein, the external frame line trigger signal that clock module produces links to each other with the signal generator with the reference clock signal line, and the reference clock line of signal generator is connected to the reference clock input port of spectrum analyzer.External frame line trigger signal and reference clock signal line all are the BNC coaxial cable, provide triggering signal and reference clock signal to the signal generator respectively.
Optical interface module 103a3, be used for the baseband signal that RRU103b sends is carried out opto-electronic conversion, baseband signal after the conversion is sent to base band demodulating module 103a5, the baseband signal that test model data transmission module 103a2 sends is carried out the electric light conversion, the baseband signal after the conversion is sent to RRU103b by optical fiber;
Preferably, the optical interface agreement of optical interface module support comprises: IR interface protocol, CPRI interface protocol, OBSAI interface protocol or self defined interface agreement.
Base band demodulating module 103a5 is used for the baseband signal that optical interface module 103a3 sends is carried out demodulation analysis, and the baseband signal behind the demodulation analysis is sent to control and management module 103a1;
Test model data transmission module 103a2, be used for producing according to the descending IQ data that control and management module 103a1 sends the EUTRA test model of transmitter radio frequency testing regulation, the baseband signal under the EUTRA test model that produces is sent to optical interface module 103a3;
Preferably, the EUTRA test model comprises E-MT1.1 model, E-MT1.2 model, E-MT2 model, E-MT3.1 model, E-MT3.2 model and E-MT3.3 model.
Control and management module 103a1, the baseband signal that is used for base band demodulating module 103a5 is sent sends to control PC by internal lan, and the descending IQ data that control PC is sent send to test model data transmission module 103a2.
As can be seen from the above-described embodiment, method of testing of the present invention and system have solved the error that the manual test method is brought, so that the radio-frequency (RF) index characteristic conforms truth of base station.Simultaneously, not only can save testing cost, and can save the testing time, this method also can be tested the RRU equipment of many antennas, provides a feasible scheme for the RF index of testing base station.Also be applicable to the radio frequency testing of many antennas.
By Long-distance Control and ethernet technology, the radio-frequency (RF) index of the testing base station of automation, take full advantage of the test instrumentation resource in laboratory, set up flexibly test environment, develop simple program control, realize automatic test, save the man power and material, can shorten the time of test, can correctly reflect the RF characteristic of base station, satisfy the requirement to the base station radio-frequency index test.
Embodiment two
Usually excessive from the power of the baseband signal of radio frequency remote unit RRU output, might burn out spectrum analyzer, same, the power of the radiofrequency signal on the radio-frequency antenna port of selecting from radio-frequency (RF) switch also may be very large.Therefore, the embodiment of the present application also provides a kind of LTE radio frequency test system of base station.The difference of present embodiment and embodiment one is: add an electrically controlled attenuator between radio frequency remote unit RRU and radio-frequency (RF) switch.See also Fig. 3, it is the structural representation of another embodiment of the radio frequency test system of a kind of LTE of the application base station, this system comprises: control PC101, internal lan 102, Auxiliary Control Element 103a, radio frequency remote unit RRU 103b, electrically controlled attenuator 103c, radio-frequency (RF) switch 103d, circulator 103e, spectrum analyzer 103f and signal generator 103g, wherein
Control PC101 is used for issuing control command to spectrum analyzer 103f, signal generator 103g, radio-frequency (RF) switch 103d, RRU103b and Auxiliary Control Element 103a by internal lan 102;
Radio-frequency (RF) switch 103d is used for switching to different radio-frequency antenna ports under the control of control PC101, in order to the radio-frequency (RF) index of different radio-frequency antenna ports is tested;
Electrically controlled attenuator 103c, be used under the control of control PC101, power to the radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch 103d selection is decayed, radiofrequency signal after the decay is sent to RRU103b, power to the radiofrequency signal after the RRU103b processing is decayed, and the radiofrequency signal after the decay is sent to radio-frequency (RF) switch 103d;
Wherein, the electrically controlled attenuator 103c that the embodiment of the present application increases newly is connected on the internal lan 102 by netting twine, so that control PC sends control command by internal lan 101, the control electrically controlled attenuator is carried out the task of appointment.
RRU103b, be used under the control of control PC101, the data that radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch 103d selection is carried out on the receiver link are processed, and the baseband signal after will processing by Optical Fiber Transmission to Auxiliary Control Element 103a, the data that the baseband signal of Auxiliary Control Element 103a generation is carried out on the transmitter chain are processed, and the radiofrequency signal after will processing sends to radio-frequency (RF) switch 103d;
Because control PC101, internal lan 102, Auxiliary Control Element 103a, radio frequency remote unit RRU 103b, radio-frequency (RF) switch 103d, circulator 103e, spectrum analyzer 103f and signal generator 103g describe in detail in embodiment one, so locate to repeat no more, correlation function and structure can be referring to embodiment one.
As can be seen from the above-described embodiment, method of testing of the present invention and system have solved the error that the manual test method is brought, so that the radio-frequency (RF) index characteristic conforms truth of base station.Simultaneously, not only can save testing cost, and can save the testing time, this method also can be tested the RRU equipment of many antennas, provides a feasible scheme for the RF index of testing base station.Also be applicable to the radio frequency testing of many antennas.
Embodiment three
The embodiment of the present application also provides a kind of LTE radio frequency test system of base station.The difference of present embodiment and embodiment two is: add a channel simulation instrument between radio frequency remote unit RRU and electrically controlled attenuator.See also Fig. 4, it is the structural representation of another embodiment of the radio frequency test system of a kind of LTE of the application base station, and this system comprises: control PC101, internal lan 102, Auxiliary Control Element 103a, radio frequency remote unit RRU 103b, channel simulation instrument 103h, electrically controlled attenuator 103c, radio-frequency (RF) switch 103d, circulator 103e, spectrum analyzer 103f and signal generator 103g.Channel simulation instrument 103h is introduced in this enforcement, is used for simulating various wireless channel communication environments models under the control of control PC101 test less radio-frequency performance index.Because control PC101, internal lan 102, Auxiliary Control Element 103a, radio frequency remote unit RRU 103b, electrically controlled attenuator 103c, radio-frequency (RF) switch 103d, circulator 103e, spectrum analyzer 103f and signal generator 103g describe in detail in embodiment two, so locate to repeat no more, correlation function and structure can be referring to embodiment two.
As can be seen from the above-described embodiment, this method also can be tested the RRU equipment of many antennas, provides a feasible scheme for the RF index of testing base station.Also be applicable to the radio-frequency (RF) index test of many antennas, further be applicable to the radio-frequency performance index test of many antennas, when the radio frequency sending set of testing many antennas and receiver index test, bypass channel channel simulation instrument gets final product.
By Long-distance Control and ethernet technology, the radio-frequency (RF) index of the testing base station of automation, take full advantage of the test instrumentation resource in laboratory, set up flexibly test environment, develop simple program control, realize automatic test, save the man power and material, can shorten the time of test, can correctly reflect the RF characteristic of base station, satisfy the requirement to the base station radio-frequency index test.
Embodiment four
The embodiment of the present application also provides the receiver radio frequency method of testing that realizes in a kind of radio frequency test system in embodiment one.See also Fig. 5, it is the flow chart of an embodiment of the receiver radio frequency method of testing that realizes based on radio frequency test system among a kind of embodiment one of the application.The method may further comprise the steps:
Step 501: control PC sends control command control Auxiliary Control Element by internal lan and produces required external frame triggering signal and the reference clock signal of signal generator;
Step 502: control PC sends control command control signal generator by internal lan and opens, and produces the required radiofrequency signal of receiver radio frequency test, so that the radio signal transmission that circulator produces the signal generator is to radio-frequency (RF) switch;
Step 503: control PC sends control command control radio-frequency (RF) switch by internal lan and switches on the radio-frequency antenna port of appointment;
Step 504: control PC processes by the data that internal lan transmission control command control RRU carries out on the receiver link the radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection, and the baseband signal merits and demerits Optical Fiber Transmission after will processing is to Auxiliary Control Element;
Step 505: control PC is transmitted to control PC by the baseband signal that internal lan transmission control command control Auxiliary Control Element sends RRU.
Wherein, described control PC sends baseband signal that control command control Auxiliary Control Element sends RRU by internal lan and is transmitted to control PC and comprises: Auxiliary Control Element carries out opto-electronic conversion with the baseband signal that RRU sends; Baseband signal after the conversion is carried out demodulation analysis; Give control PC with the base band signal transmission behind the demodulation analysis.
As can be seen from the above-described embodiment, method of testing of the present invention and system have solved the error that the manual test method is brought, so that the radio-frequency (RF) index characteristic conforms truth of base station.Simultaneously, not only can save testing cost, and can save the testing time, this method also can be tested the RRU equipment of many antennas, provides a feasible scheme for the RF index of testing base station.Also be applicable to the radio frequency testing of many antennas.
By Long-distance Control and ethernet technology, the radio-frequency (RF) index of the testing base station of automation, take full advantage of the test instrumentation resource in laboratory, set up flexibly test environment, develop simple program control, realize automatic test, save the man power and material, can shorten the time of test, can correctly reflect the RF characteristic of base station, satisfy the requirement to the base station radio-frequency index test.
Embodiment five
The power of the radiofrequency signal on the radio-frequency antenna port of usually selecting from radio-frequency (RF) switch also may be very large.Therefore, the embodiment of the present application also provides a kind of receiver radio frequency method of testing.The difference of present embodiment and embodiment three is: utilize electrically controlled attenuator that the power of the radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection is decayed.See also Fig. 6, it is the flow chart of another embodiment of the receiver radio frequency method of testing that realizes based on radio frequency test system among a kind of embodiment one of the application.May further comprise the steps:
Step 601: control PC sends control command control Auxiliary Control Element by internal lan and produces required external frame triggering signal and the reference clock signal of signal generator;
Step 602: control PC sends control command control signal generator by internal lan and opens, and produces the required radiofrequency signal of receiver radio frequency test, so that the radio signal transmission that circulator produces the signal generator is to radio-frequency (RF) switch;
Step 603: control PC sends control command control radio-frequency (RF) switch by internal lan and switches on the radio-frequency antenna port of appointment;
Step 604: control PC sends control command control electrically controlled attenuator by internal lan the power of the radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection is decayed, and the radiofrequency signal after the decay is sent to RRU;
Step 605: control PC processes by the data that internal lan transmission control command control RRU carries out on the receiver link the radiofrequency signal after decaying, and the baseband signal merits and demerits Optical Fiber Transmission after will processing is to Auxiliary Control Element;
Step 606: control PC is transmitted to control PC by the baseband signal that internal lan transmission control command control Auxiliary Control Element sends RRU.
As can be seen from the above-described embodiment, method of testing of the present invention and system have solved the error that the manual test method is brought, so that the radio-frequency (RF) index characteristic conforms truth of base station.Simultaneously, not only can save testing cost, and can save the testing time, this method also can be tested the RRU equipment of many antennas, provides a feasible scheme for the RF index of testing base station.Also be applicable to the radio frequency testing of many antennas.
By Long-distance Control and ethernet technology, the radio-frequency (RF) index of the testing base station of automation, take full advantage of the test instrumentation resource in laboratory, set up flexibly test environment, develop simple program control, realize automatic test, save the man power and material, can shorten the time of test, can correctly reflect the RF characteristic of base station, satisfy the requirement to the base station radio-frequency index test.
Embodiment six
The embodiment of the present application also provides the transmitter radio frequency test method of realizing in a kind of radio frequency test system in embodiment one.See also Fig. 7, it is the flow chart of an embodiment of the transmitter radio frequency test method of realizing based on radio frequency test system among a kind of embodiment one of the application.The method may further comprise the steps:
Step 701: control PC sends control command control Auxiliary Control Element by internal lan and produces the required triggering signal of spectrum analyzer;
Step 702: control PC sends control command control Auxiliary Control Element by internal lan the baseband signal that self produces is sent to RRU by optical fiber;
Wherein, described control PC sends control command control Auxiliary Control Element by internal lan and the baseband signal that self produces is sent to RRU by optical fiber comprises: Auxiliary Control Element receives the descending IQ data that control PC sends; Produce the EUTRA test model of transmitter radio frequency testing regulation according to described descending IQ data; Baseband signal under the EUTRA test model that produces sends to RRU by optical fiber.
Step 703: control PC processes by the data that internal lan transmission control command control RRU carries out on the transmitter chain the baseband signal that receives, and the radiofrequency signal after will processing sends to radio-frequency (RF) switch;
Step 704: control PC sends control command control radio-frequency (RF) switch by internal lan and switches on the radio-frequency antenna port of appointment, so that the radio signal transmission on the radio-frequency antenna port that circulator is selected radio-frequency (RF) switch is to spectrum analyzer;
Step 705: control PC sends control command control spectrum analyzer by internal lan, and the radiofrequency signal that receives is carried out the indicator transmitter test.
As can be seen from the above-described embodiment, method of testing of the present invention and system have solved the error that the manual test method is brought, so that the radio-frequency (RF) index characteristic conforms truth of base station.Simultaneously, not only can save testing cost, and can save the testing time, this method also can be tested the RRU equipment of many antennas, provides a feasible scheme for the RF index of testing base station.Also be applicable to the radio frequency testing of many antennas.
By Long-distance Control and ethernet technology, the radio-frequency (RF) index of the testing base station of automation, take full advantage of the test instrumentation resource in laboratory, set up flexibly test environment, develop simple program control, realize automatic test, save the man power and material, can shorten the time of test, can correctly reflect the RF characteristic of base station, satisfy the requirement to the base station radio-frequency index test.
Embodiment seven
Usually excessive from the power of the baseband signal of radio frequency remote unit RRU output, might burn out spectrum analyzer.Therefore, the embodiment of the present application also provides a kind of transmitter radio frequency test method.The difference of present embodiment and embodiment five is: utilize the power of the radiofrequency signal after electrically controlled attenuator is processed RRU to decay.See also Fig. 8, it is the flow chart of an embodiment of the transmitter radio frequency test method of realizing based on radio frequency test system among a kind of embodiment one of the application.May further comprise the steps:
Step 801: control PC sends control command control Auxiliary Control Element by internal lan and produces the required triggering signal of spectrum analyzer;
Step 802: control PC sends control command control Auxiliary Control Element by internal lan the baseband signal that self produces is sent to RRU by optical fiber;
Wherein, described control PC sends control command control Auxiliary Control Element by internal lan and the baseband signal that self produces is sent to RRU by optical fiber comprises: Auxiliary Control Element receives the descending IQ data that control PC sends; Produce the EUTRA test model of transmitter radio frequency testing regulation according to described descending IQ data; Baseband signal under the EUTRA test model that produces sends to RRU by optical fiber.
Step 803: control PC processes by the data that internal lan transmission control command control RRU carries out on the transmitter chain the baseband signal that receives;
Step 804: control PC decays by the power that internal lan sends the radiofrequency signal after control command control electrically controlled attenuator is processed RRU, and the radiofrequency signal after will decaying sends to radio-frequency (RF) switch;
Step 805: control PC sends control command control radio-frequency (RF) switch by internal lan and switches on the radio-frequency antenna port of appointment, so that the radio signal transmission on the radio-frequency antenna port that circulator is selected radio-frequency (RF) switch is to spectrum analyzer;
Step 806: control PC sends control command control spectrum analyzer by internal lan, and the radiofrequency signal that receives is carried out the indicator transmitter test.
As can be seen from the above-described embodiment, method of testing of the present invention and system have solved the error that the manual test method is brought, so that the radio-frequency (RF) index characteristic conforms truth of base station.Simultaneously, not only can save testing cost, and can save the testing time, this method also can be tested the RRU equipment of many antennas, provides a feasible scheme for the RF index of testing base station.Also be applicable to the radio frequency testing of many antennas.
By Long-distance Control and ethernet technology, the radio-frequency (RF) index of the testing base station of automation, take full advantage of the test instrumentation resource in laboratory, set up flexibly test environment, develop simple program control, realize automatic test, save the man power and material, can shorten the time of test, can correctly reflect the RF characteristic of base station, satisfy the requirement to the base station radio-frequency index test.
Need to prove, one of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, to come the relevant hardware of instruction to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process such as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or store-memory body (Random AccessMemory, RAM) etc. at random.
More than radio frequency test system and the method for a kind of LTE provided by the present invention base station is described in detail, used specific embodiment herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. the radio frequency test system of a LTE base station is characterized in that, comprising: signal generator, spectrum analyzer, control PC, internal lan, circulator, radio-frequency (RF) switch, radio frequency remote unit RRU and Auxiliary Control Element, wherein,
Described control PC is used for issuing control command to spectrum analyzer, signal generator, radio-frequency (RF) switch, RRU and Auxiliary Control Element by internal lan;
Described signal generator is used for opening under the control of control PC, produces the required radiofrequency signal of receiver radio frequency test;
Described spectrum analyzer is used for opening under the control of control PC, and the baseband signal that receives is carried out the indicator transmitter test;
Described circulator, the radio signal transmission that is used for the signal generator is produced be to radio-frequency (RF) switch, and the radio signal transmission on the radio-frequency antenna port that radio-frequency (RF) switch is selected is to spectrum analyzer;
Described radio-frequency (RF) switch is used for switching to different radio-frequency antenna ports under the control of control PC, in order to the radio-frequency (RF) index of different radio-frequency antenna ports is tested;
Described RRU, be used under the control of control PC, the data that radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection is carried out on the receiver link are processed, and the baseband signal after will processing by Optical Fiber Transmission to Auxiliary Control Element, the data that the baseband signal of Auxiliary Control Element generation is carried out on the transmitter chain are processed, and the radiofrequency signal after will processing sends to radio-frequency (RF) switch;
Described Auxiliary Control Element, be used under the control of control PC, produce required external frame triggering signal and the reference clock signal of signal generator, and, the triggering signal that frequency spectrum generator is required, the baseband signal that RRU is sent is transmitted to control PC, send to RRU with self producing baseband signal by optical fiber, described Auxiliary Control Element comprises: the control and management module, the test model data transmission module, the base band demodulating module, optical interface module and clock module, wherein, described clock module for generation of signal generator required external frame triggering signal and reference clock signal, produces the required triggering signal of frequency spectrum generator; Described optical interface module, be used for the baseband signal that RRU sends is carried out opto-electronic conversion, baseband signal after the conversion is sent to the base band demodulating module, the baseband signal that the test model data transmission module sends is carried out the electric light conversion, the baseband signal after the conversion is sent to RRU by optical fiber; Described base band demodulating module is used for the baseband signal that the optical interface module sends is carried out demodulation analysis, and the baseband signal behind the demodulation analysis is sent to the control and management module; Described test model data transmission module is used for producing the EUTRA test model that the transmitter radio frequency testing is stipulated according to the descending IQ data that the control and management module sends, and the baseband signal under the EUTRA test model that produces is sent to the optical interface module; Described control and management module, the baseband signal that is used for the base band demodulating module is sent sends to control PC by internal lan, and the descending IQ data that control PC is sent send to the test model data transmission module.
2. system according to claim 1, it is characterized in that, described system also comprises electrically controlled attenuator, then described control PC issues control command to described electrically controlled attenuator by internal lan, described electrically controlled attenuator, be used under the control of control PC, power to the radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection is decayed, radiofrequency signal after the decay is sent to RRU, power to the radiofrequency signal after the RRU processing is decayed, and the radiofrequency signal after the decay is sent to radio-frequency (RF) switch.
3. system according to claim 1, it is characterized in that, described system also comprises the channel simulation instrument between radio frequency remote unit RRU and electrically controlled attenuator, then described control PC issues control command to described channel simulation instrument by internal lan, described channel simulation instrument, be used under the control of control PC101, simulating various wireless channel communication environments models test less radio-frequency performance index.
4. a receiver radio frequency method of testing that realizes based on radio frequency test system claimed in claim 1 is characterized in that, comprising:
Control PC sends control command control Auxiliary Control Element by internal lan and produces required external frame triggering signal and the reference clock signal of signal generator;
Control PC sends control command control signal generator by internal lan and opens, and produces the required radiofrequency signal of receiver radio frequency test, so that the radio signal transmission that circulator produces the signal generator is to radio-frequency (RF) switch;
Control PC sends control command control radio-frequency (RF) switch by internal lan and switches on the radio-frequency antenna port of appointment;
Control PC sends the data that the radiofrequency signal on the radio-frequency antenna port that control command control RRU selects radio-frequency (RF) switch carries out on the receiver link by internal lan and processes, and the baseband signal after will processing by Optical Fiber Transmission to Auxiliary Control Element;
Control PC is transmitted to control PC by the baseband signal that internal lan transmission control command control Auxiliary Control Element sends RRU, specifically comprise: Auxiliary Control Element carries out opto-electronic conversion with the baseband signal that RRU sends, baseband signal after the conversion is carried out demodulation analysis, give control PC with the base band signal transmission behind the demodulation analysis.
5. method according to claim 4, it is characterized in that, described method also comprises: when control PC sends on the radio-frequency antenna port that control command control radio-frequency (RF) switch switches to appointment by internal lan after, control PC sends control command control electrically controlled attenuator by internal lan the power of the radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection is decayed, radiofrequency signal after the decay is sent to RRU, process so that RRU carries out data to the radiofrequency signal after decaying.
6. a transmitter radio frequency test method of realizing based on radio frequency test system claimed in claim 1 is characterized in that, comprising:
Control PC sends control command control Auxiliary Control Element by internal lan and produces the required triggering signal of spectrum analyzer;
Control PC sends control command control Auxiliary Control Element by internal lan the baseband signal that self produces is sent to RRU by optical fiber, specifically comprise: Auxiliary Control Element receives the descending IQ data that control PC sends, produce the EUTRA test model that the transmitter radio frequency testing is stipulated according to described descending IQ data, the baseband signal under the EUTRA test model of generation sends to RRU by optical fiber;
Control PC processes by the data that internal lan transmission control command control RRU carries out on the transmitter chain the baseband signal that receives, and the radiofrequency signal after will processing sends to radio-frequency (RF) switch;
Control PC sends control command control radio-frequency (RF) switch by internal lan and switches on the radio-frequency antenna port of appointment, so that the radio signal transmission on the radio-frequency antenna port that circulator is selected radio-frequency (RF) switch is to spectrum analyzer;
Control PC sends control command control spectrum analyzer by internal lan, and the radiofrequency signal that receives is carried out the indicator transmitter test.
7. method according to claim 6, it is characterized in that, described method also comprises: the baseband signal that receives is carried out after data on the transmitter chain process when control PC sends control command control RRU by internal lan, control PC decays by the power that internal lan sends the radiofrequency signal after control command control electrically controlled attenuator is processed RRU, and the radiofrequency signal after will decaying sends to radio-frequency (RF) switch.
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| CN102546058B (en) * | 2011-12-30 | 2015-06-10 | 成都市大富科技有限公司 | Automatic test system, equipment and method based on multi-channel radio remote unit |
| CN102595447B (en) * | 2012-02-24 | 2015-05-13 | 电子科技大学 | Method and device for wireless measuring sensitivity of base station |
| CN103532646B (en) * | 2013-10-12 | 2017-02-22 | 工业和信息化部电信传输研究所 | Testing method for base-station radio-frequency testing system applicable to LTE (Long Term Evolution) system |
| CN106332116A (en) * | 2015-06-23 | 2017-01-11 | 中兴通讯股份有限公司 | Baseband unit test method and apparatus |
| CN105721253A (en) * | 2016-03-30 | 2016-06-29 | 辽宁信鼎检测认证有限公司 | LTE FDD automatic test system and test method of LTE FDD automatic test system |
| CN107547144B (en) * | 2016-06-27 | 2021-09-28 | 中兴通讯股份有限公司 | Radio frequency test system |
| CN107769868B (en) * | 2016-08-18 | 2022-03-29 | 中兴通讯股份有限公司 | Remote radio unit and detection method thereof |
| CN107294627B (en) * | 2017-06-23 | 2020-10-30 | 武汉虹信通信技术有限责任公司 | Whole machine testing and aging method and system for RRU |
| CN107634809B (en) * | 2017-09-15 | 2021-05-04 | 武汉虹信科技发展有限责任公司 | Self-aging test method and system for remote radio unit |
| CN109560824B (en) * | 2017-09-27 | 2021-03-12 | 大唐移动通信设备有限公司 | Radio frequency index testing system |
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| CN110311739B (en) * | 2019-07-30 | 2022-03-25 | 京信网络系统股份有限公司 | Calibration test system, method and device for multi-channel RRU and storage medium |
| CN112910581B (en) * | 2019-11-19 | 2022-07-12 | 大唐移动通信设备有限公司 | Interference positioning method, interference positioning device and distributed base station system |
| CN111148141B (en) * | 2019-12-27 | 2023-05-16 | 京信网络系统股份有限公司 | LTE base station, LTE base station testing system and LTE base station testing method |
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