CN102014413A - 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 the 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 is meant 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 placed apart and that link to each other by optical fiber as module independently separately.Wherein, RRU mainly realizes functions such as radio-frequency (RF) transceiver, and power amplifier.In actual use, in order to guarantee the stability of system, need carry out radio frequency testing to RRU.
From test contents, 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 sign indicating number 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 also developed can commercial automatic test Control Software.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, code division multiple access inserts) the diverse air interface of technology, but at descending employing OFDMA (Orthogonal Frequency Division Multiple Access, orthogonal frequency division multiplexing multiple access inserts) technology, SC-FDMA (single carrier Frequency DivisionMultiple Access in up employing peak-to-average force ratio optimization, the multiplexing multiple access of single carrier frequency division inserts) technology, in addition, different with 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 RRU to carry out automatic test method and system to WCDMA in the 3G technology and TD-SCDMA.But,, also need to consider the demand that the radio-frequency (RF) index of many antennas is tested owing to introduced the MIMO technology in the LTE technology.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 the 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 and give 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 is given radio-frequency (RF) switch, gives spectrum analyzer with the radio signal transmission on the radio-frequency antenna port of radio-frequency (RF) switch selection; Described radio-frequency (RF) switch is used for switching to different radio-frequency antenna ports under the control of control PC, so that the radio-frequency (RF) index of different radio-frequency antenna ports is tested; Described RRU, be used under the control of control PC, radiofrequency signal on the radio-frequency antenna port that radio-frequency (RF) switch is selected is carried out the data processing on the receiver link, and the baseband signal after will handling is given Auxiliary Control Element by Optical Fiber Transmission, the baseband signal that Auxiliary Control Element is produced is carried out the data processing on the transmitter chain, and the radiofrequency signal after will handling 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 the 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 produces required external frame triggering signal and the reference clock signal of signal generator by internal lan transmitting control commands control Auxiliary Control Element; Control PC opens by internal lan transmitting control commands control signal generator, and produces the required radiofrequency signal of receiver radio frequency test, so that circulator is given radio-frequency (RF) switch with the radio signal transmission that the signal generator produces; Control PC switches on the radio-frequency antenna port of appointment by internal lan transmitting control commands control radio-frequency (RF) switch; Radiofrequency signal on the radio-frequency antenna port that control PC selects radio-frequency (RF) switch by internal lan transmitting control commands control RRU is carried out the data processing on the receiver link, and the baseband signal after will handling by Optical Fiber Transmission to Auxiliary Control Element; Control PC is transmitted to control PC by the baseband signal that internal lan transmitting control commands 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 produces the required triggering signal of spectrum analyzer by internal lan transmitting control commands control Auxiliary Control Element; Control PC sends to RRU with the baseband signal that self produces by optical fiber by internal lan transmitting control commands control Auxiliary Control Element; Control PC carries out data processing on the transmitter chain by internal lan transmitting control commands control RRU to the baseband signal that receives, and the radiofrequency signal after will handling sends to radio-frequency (RF) switch; Control PC switches on the radio-frequency antenna port of appointment by internal lan transmitting control commands control radio-frequency (RF) switch, so that circulator is given spectrum analyzer with the radio signal transmission on the radio-frequency antenna port of radio-frequency (RF) switch selection; Control PC carries out the indicator transmitter test by internal lan transmitting control commands control spectrum analyzer to the radiofrequency signal that receives.
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, and make 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, make full use of breadboard test instrumentation resource, set up test environment flexibly, 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 requirement 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, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
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, the embodiment of the invention is described in detail below in conjunction with accompanying drawing.
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 by internal lan 102 and gives spectrum analyzer 103f, signal generator 103g, radio-frequency (RF) switch 103d, RRU103b and Auxiliary Control Element 103a;
Wherein, internal lan 102 is made up 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 is by internal lan 102 transmitting control commands, 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 realizes that mainly (Fixedreference channels, FRC), the fixed reference channel comprises FRC A1 and FRC A2 for the fixed reference channel of receiver radio frequency test defined.
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, so that the radio-frequency (RF) index of different radio-frequency antenna ports is tested;
RRU103b, be used under the control of control PC101, radiofrequency signal on the radio-frequency antenna port that radio-frequency (RF) switch 103d is selected is carried out the data processing on the receiver link, and the radiofrequency signal after will handling is given Auxiliary Control Element 103a by Optical Fiber Transmission, the baseband signal that Auxiliary Control Element 103a is produced is carried out the data processing on the transmitter chain, and the radiofrequency signal after will handling 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 RRU carries out on the transmitter chain the baseband signal that Auxiliary Control Element produces 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 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 is used to produce 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 management module 103a1;
Test model data transmission module 103a2, be used for producing 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 according to the descending IQ data that control management module 103a1 sends;
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 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, and make 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, make full use of breadboard test instrumentation resource, set up test environment flexibly, 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 requirement the base station radio-frequency index test.
Embodiment two
Usually excessive from the power of 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 big.Therefore, the embodiment of the present application also provides a kind of LTE the 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 by internal lan 102 and gives spectrum analyzer 103f, signal generator 103g, radio-frequency (RF) switch 103d, RRU103b and Auxiliary Control Element 103a;
Radio-frequency (RF) switch 103d is used for switching to different radio-frequency antenna ports under the control of control PC101, so that 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 controls the task that electrically controlled attenuator is carried out appointment by internal lan 101 transmitting control commands.
RRU103b, be used under the control of control PC101, radiofrequency signal on the radio-frequency antenna port that radio-frequency (RF) switch 103d is selected is carried out the data processing on the receiver link, and the baseband signal after will handling is given Auxiliary Control Element 103a by Optical Fiber Transmission, the baseband signal that Auxiliary Control Element 103a is produced is carried out the data processing on the transmitter chain, and the radiofrequency signal after will handling 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, and make 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 the 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, make full use of breadboard test instrumentation resource, set up test environment flexibly, 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 requirement 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.This method may further comprise the steps:
Step 501: control PC produces required external frame triggering signal and the reference clock signal of signal generator by internal lan transmitting control commands control Auxiliary Control Element;
Step 502: control PC opens by internal lan transmitting control commands control signal generator, and produces the required radiofrequency signal of receiver radio frequency test, so that circulator is given radio-frequency (RF) switch with the radio signal transmission that the signal generator produces;
Step 503: control PC switches on the radio-frequency antenna port of appointment by internal lan transmitting control commands control radio-frequency (RF) switch;
Step 504: the radiofrequency signal on the radio-frequency antenna port that control PC selects radio-frequency (RF) switch by internal lan transmitting control commands control RRU is carried out the data processing on the receiver link, and the baseband signal merits and demerits Optical Fiber Transmission after will handling is to Auxiliary Control Element;
Step 505: control PC is transmitted to control PC by the baseband signal that internal lan transmitting control commands control Auxiliary Control Element sends RRU.
Wherein, the baseband signal that RRU sent by internal lan transmitting control commands control Auxiliary Control Element of described control PC 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; Baseband signal behind the demodulation analysis is transferred to control PC.
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, and make 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, make full use of breadboard test instrumentation resource, set up test environment flexibly, 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 requirement the base station radio-frequency index test.
Embodiment five
The power of common radiofrequency signal from the radio-frequency antenna port of radio-frequency (RF) switch selection also may be very big.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 produces required external frame triggering signal and the reference clock signal of signal generator by internal lan transmitting control commands control Auxiliary Control Element;
Step 602: control PC opens by internal lan transmitting control commands control signal generator, and produces the required radiofrequency signal of receiver radio frequency test, so that circulator is given radio-frequency (RF) switch with the radio signal transmission that the signal generator produces;
Step 603: control PC switches on the radio-frequency antenna port of appointment by internal lan transmitting control commands control radio-frequency (RF) switch;
Step 604: control PC decays to the power of the radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection by internal lan transmitting control commands control electrically controlled attenuator, and the radiofrequency signal after the decay is sent to RRU;
Step 605: control PC carries out data processing on the receiver link by the radiofrequency signal of internal lan transmitting control commands control RRU after to decay, and the baseband signal merits and demerits Optical Fiber Transmission after will handling is to Auxiliary Control Element;
Step 606: control PC is transmitted to control PC by the baseband signal that internal lan transmitting control commands 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, and make 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, make full use of breadboard test instrumentation resource, set up test environment flexibly, 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 requirement 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.This method may further comprise the steps:
Step 701: control PC produces the required triggering signal of spectrum analyzer by internal lan transmitting control commands control Auxiliary Control Element;
Step 702: control PC sends to RRU with the baseband signal that self produces by optical fiber by internal lan transmitting control commands control Auxiliary Control Element;
Wherein, described control PC sends to RRU with the baseband signal that self produces by optical fiber by internal lan transmitting control commands control Auxiliary Control Element and 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 carries out data processing on the transmitter chain by internal lan transmitting control commands control RRU to the baseband signal that receives, and the radiofrequency signal after will handling sends to radio-frequency (RF) switch;
Step 704: control PC switches on the radio-frequency antenna port of appointment by internal lan transmitting control commands control radio-frequency (RF) switch, so that circulator is given spectrum analyzer with the radio signal transmission on the radio-frequency antenna port of radio-frequency (RF) switch selection;
Step 705: control PC carries out the indicator transmitter test by internal lan transmitting control commands control spectrum analyzer to the radiofrequency signal that receives.
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, and make 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, make full use of breadboard test instrumentation resource, set up test environment flexibly, 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 requirement the base station radio-frequency index test.
Embodiment seven
Usually excessive from the power of 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 handled 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 produces the required triggering signal of spectrum analyzer by internal lan transmitting control commands control Auxiliary Control Element;
Step 802: control PC sends to RRU with the baseband signal that self produces by optical fiber by internal lan transmitting control commands control Auxiliary Control Element;
Wherein, described control PC sends to RRU with the baseband signal that self produces by optical fiber by internal lan transmitting control commands control Auxiliary Control Element and 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 carries out data processing on the transmitter chain by internal lan transmitting control commands control RRU to the baseband signal that receives;
Step 804: the power of the radiofrequency signal after control PC handles RRU by internal lan transmitting control commands control electrically controlled attenuator is decayed, and the radiofrequency signal after will decaying sends to radio-frequency (RF) switch;
Step 805: control PC switches on the radio-frequency antenna port of appointment by internal lan transmitting control commands control radio-frequency (RF) switch, so that circulator is given spectrum analyzer with the radio signal transmission on the radio-frequency antenna port of radio-frequency (RF) switch selection;
Step 806: control PC carries out the indicator transmitter test by internal lan transmitting control commands control spectrum analyzer to the radiofrequency signal that receives.
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, and make 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, make full use of breadboard test instrumentation resource, set up test environment flexibly, 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 requirement 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 the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random AccessMemory, RAM) etc.
More than the 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, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
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 by internal lan and gives spectrum analyzer, signal generator, radio-frequency (RF) switch, RRU and Auxiliary Control Element;
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 is given radio-frequency (RF) switch, gives spectrum analyzer with the radio signal transmission on the radio-frequency antenna port of radio-frequency (RF) switch selection;
Described radio-frequency (RF) switch is used for switching to different radio-frequency antenna ports under the control of control PC, so that the radio-frequency (RF) index of different radio-frequency antenna ports is tested;
Described RRU, be used under the control of control PC, radiofrequency signal on the radio-frequency antenna port that radio-frequency (RF) switch is selected is carried out the data processing on the receiver link, and the baseband signal after will handling is given Auxiliary Control Element by Optical Fiber Transmission, the baseband signal that Auxiliary Control Element is produced is carried out the data processing on the transmitter chain, and the radiofrequency signal after will handling 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 the 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.
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 by internal lan and gives described electrically controlled attenuator, 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 by internal lan and gives described channel simulation instrument, 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. according to any described system among the claim 1-3, it is characterized in that described Auxiliary Control Element comprises: control management module, test model data transmission module, base band demodulating module, optical interface module and clock module, wherein,
Described clock module is used to produce 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 control 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 control management module sends, and the baseband signal under the EUTRA test model that produces is sent to the optical interface module;
Described control 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.
5. a receiver radio frequency method of testing that realizes based on the described radio frequency test system of claim 1 is characterized in that, comprising:
Control PC produces required external frame triggering signal and the reference clock signal of signal generator by internal lan transmitting control commands control Auxiliary Control Element;
Control PC opens by internal lan transmitting control commands control signal generator, and produces the required radiofrequency signal of receiver radio frequency test, so that circulator is given radio-frequency (RF) switch with the radio signal transmission that the signal generator produces;
Control PC switches on the radio-frequency antenna port of appointment by internal lan transmitting control commands control radio-frequency (RF) switch;
Radiofrequency signal on the radio-frequency antenna port that control PC selects radio-frequency (RF) switch by internal lan transmitting control commands control RRU is carried out the data processing on the receiver link, and the baseband signal after will handling by Optical Fiber Transmission to Auxiliary Control Element;
Control PC is transmitted to control PC by the baseband signal that internal lan transmitting control commands control Auxiliary Control Element sends RRU.
6. method according to claim 5, it is characterized in that, described method also comprises: switch on the radio-frequency antenna port of appointment by internal lan transmitting control commands control radio-frequency (RF) switch as control PC after, control PC decays to the power of the radiofrequency signal on the radio-frequency antenna port of radio-frequency (RF) switch selection by internal lan transmitting control commands control electrically controlled attenuator, radiofrequency signal after the decay is sent to RRU, so that RRU carries out data processing to the radiofrequency signal after decaying.
7. according to claim 5 or 6 described methods, it is characterized in that the baseband signal that described control PC sends RRU by internal lan transmitting control commands control Auxiliary Control Element 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;
Baseband signal behind the demodulation analysis is transferred to control PC.
8. a transmitter radio frequency test method of realizing based on the described radio frequency test system of claim 1 is characterized in that, comprising:
Control PC produces the required triggering signal of spectrum analyzer by internal lan transmitting control commands control Auxiliary Control Element;
Control PC sends to RRU with the baseband signal that self produces by optical fiber by internal lan transmitting control commands control Auxiliary Control Element;
Control PC carries out data processing on the transmitter chain by internal lan transmitting control commands control RRU to the baseband signal that receives, and the radiofrequency signal after will handling sends to radio-frequency (RF) switch;
Control PC switches on the radio-frequency antenna port of appointment by internal lan transmitting control commands control radio-frequency (RF) switch, so that circulator is given spectrum analyzer with the radio signal transmission on the radio-frequency antenna port of radio-frequency (RF) switch selection;
Control PC carries out the indicator transmitter test by internal lan transmitting control commands control spectrum analyzer to the radiofrequency signal that receives.
9. method according to claim 8, it is characterized in that, described method also comprises: when control PC carries out data processing on the transmitter chain to the baseband signal that receives by internal lan transmitting control commands control RRU after, the power of the radiofrequency signal after control PC handles RRU by internal lan transmitting control commands control electrically controlled attenuator is decayed, and the radiofrequency signal after will decaying sends to radio-frequency (RF) switch.
10. according to Claim 8 or 9 described methods, it is characterized in that described control PC sends to RRU with the baseband signal that self produces by optical fiber by internal lan transmitting control commands control Auxiliary Control Element and 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.
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