CN103532601B - The interference detection method of multi-antenna TDD system and device - Google Patents
The interference detection method of multi-antenna TDD system and device Download PDFInfo
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Abstract
The present invention provides the interference detection method of a kind of multi-antenna TDD system, comprises the following steps: by smart antenna receiver to the calibrated channel that is input in radio frequency remoto module of radiofrequency signal；Process described radiofrequency signal by described calibrated channel, and obtain the result of described radiofrequency signal；The relevant parameter of described radiofrequency signal is determined according to described result.The present invention also provides for the interference detecting apparatus of a kind of multiple antennas TDD time-division system.The interference detection method of a kind of multiple antennas TDD time-division system that the present invention provides and device, it is capable of the easy detection from outside Radio frequency interference, thus be advantageously implemented eliminating receiving terminal and block, contribute to getting rid of external disturbance by network optimization mode, to solve waste of manpower and inefficient problem in Interference Detection means of the prior art, provide for subsequent network optimization and support.
Description
Technical field
The present invention relates to wireless communication technology field, specifically, the present invention relates to interference detection method and the device of a kind of multi-antenna TDD system.
Background technology
In recent years, owing to distributed base station has the advantages such as low cost, environmental suitability is strong, engineering construction is convenient, the framework of wireless communication system develops towards distributed base station direction just rapidly, and especially in the 3G mobile network currently built, distributed base station has obtained application widely.
Data service is the core business of 3G network, and the bandwidth that takies of data service is dozens or even hundreds of times of voice service.3G network is that terminal use provides many new business, including visual telephone, video flowing, game, MMS, E-mail, Web etc..Along with 3G network construction enters high-speed development period, the requirement that operator is quick to its network, flexible, low cost is disposed, also make moving distributing base station be increasingly becoming trend and the main flow of networking as a kind of new base station mode.
It is two functional modules that distributed base station is divided by function traditional macro base station equipment, wherein: the functions such as the base band of base station, master control, transmission, clock are integrated in one and are referred to as Base Band Unit BBU (BaseBandUnit, BBU), in module, Base Band Unit BBU volume is little, installation site is the most flexible；The intermediate frequency such as transceiver, power amplifier, RF Components are integrated in another one and call in the module of radio frequency remote unit RRU (RemoteRadioUnit, RRU), and radio frequency remote unit RRU is arranged on antenna end.It is connected by optical fiber between radio frequency unit with Base Band Unit, forms brand-new distributed base station solution.Therefore, the core concept of distributed base station structure is conventional macro base station baseband processing unit (BBU) and RF processing unit (RRU) to be separated, and the two is connected by optical fiber.When network design, baseband processing unit and core net, wireless network control apparatus are concentrated in machine room, be attached with the Remote Radio Unit of deployment on planning website by optical fiber, complete the network coverage, thus reduce construction maintenance cost, improve efficiency.
Owing to base station distribution has relative distribution, in the complex environment of outfield, base station system can receive the interference from other system, causes base station normally to work.The when of investigation interference source, owing to external field environment is complicated, staff directly carries sweep generator test interference signal source, need to test antenna, test auxiliary material, detection environment built by test power supply, test instrumentation.Detection environment build that to waste substantial amounts of manpower, financial resources, and detection efficiency low, take considerable time.Further, due to complexity and the multiformity of outfield detection environment, bigger interference and operational inconvenience are brought for location during detection.As it is shown in figure 1, disturb the schematic diagram of signal for measuring outfield, base station.Generally, the interference signal measured from sweep generator can be the most mixed and disorderly, owing to external field environment is sufficiently complex, in the case of the serious interference of this outfield, new site and interference analysis are required for building test environment and carrying out spectrum measurement, are not only limited by place and manpower, also by instrument with test auxiliary material and limited.
Therefore, for existing multiple antennas TDD time-division system, it is necessary to propose a kind of interference detection method efficient, automatic and device, to solve waste of manpower and inefficient problem in existing Interference Detection means.
Summary of the invention
The purpose of the present invention aims to provide a kind of interference detecting apparatus and the method for multiple antennas TDD time-division system, to realize the easy detection from outside Radio frequency interference, thus be advantageously implemented eliminating receiving terminal and block, contribute to getting rid of external disturbance by network optimization mode, to solve waste of manpower and inefficient problem in Interference Detection means of the prior art.
On the one hand embodiment of the present invention provides the interference detection method of a kind of multi-antenna TDD system, comprises the following steps:
By smart antenna receiver to radiofrequency signal be input to the calibrated channel in radio frequency remoto module (RRU)；
Process described radiofrequency signal by described calibrated channel, and obtain the result of described radiofrequency signal；
The relevant parameter of described radiofrequency signal is determined according to described result.
On the other hand embodiment of the present invention provides the interference detecting apparatus of a kind of multi-antenna TDD system, including input, processing module and computing module,
Described input, the radiofrequency signal arrived for the calibrated channel input smart antenna receiver in radio frequency remoto module (RRU)；
Described processing module, is used for processing described radiofrequency signal, and obtains the result of described radiofrequency signal；
Described computing module, for determining the relevant parameter of described radiofrequency signal according to described result.
The interference detecting apparatus of the multiple antennas TDD time-division system that the present invention provides and method, it is capable of the easy detection from outside Radio frequency interference, thus be advantageously implemented eliminating receiving terminal and block, contribute to getting rid of external disturbance by network optimization mode, to solve waste of manpower and inefficient problem in Interference Detection means of the prior art, provide for subsequent network optimization and support.Further it is proposed that such scheme, the change to existing system is the least, does not interferes with the compatibility of equipment, and realizes simple, efficiently.
Aspect and advantage that the present invention adds will part be given in the following description, and these will become apparent from the description below, or is recognized by the practice of the present invention.
Accompanying drawing explanation
Aspect that the present invention is above-mentioned and/or additional and advantage will be apparent from easy to understand, wherein from description to embodiment below in conjunction with the accompanying drawings:
Fig. 1 shows the schematic diagram measuring outfield, base station interference signal；
Fig. 2 shows antenna and the structural representation of RRU of multiple antennas TDD time-division system according to an embodiment of the present invention；
Fig. 3 shows the flow chart of the interference detection method of multiple antennas TDD time-division system according to an embodiment of the present invention；
Fig. 4 shows the structural representation of the calibrated channel of configuration in RRU according to an embodiment of the present invention；
Fig. 5 shows the structural representation of the calibrated channel of configuration in the RRU according to another embodiment of the present invention；
Fig. 6 shows the spectrogram of the intermediate-freuqncy signal through the output of ADC sampled signal according to an embodiment of the present invention；
Fig. 7 shows that radiofrequency signal according to an embodiment of the present invention turns the process schematic diagram of intermediate-freuqncy signal；
Fig. 8 shows the structural representation of the interference detecting apparatus of multiple antennas TDD time-division system according to an embodiment of the present invention.
Detailed description of the invention
Embodiments of the present invention are described below in detail, and the example of described embodiment is shown in the drawings, and the most same or similar label represents same or similar element or has the element of same or like function.The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, and singulative used herein " ", " one ", " described " and " being somebody's turn to do " may also comprise plural form.Should be further understood that, the wording used in the description of the present invention " includes " referring to there is described feature, integer, step, operation, element and/or assembly, but it is not excluded that existence or adds other features one or more, integer, step, operation, element, assembly and/or their group.It should be understood that when we claim element to be " connected " or during " coupled " to another element, and it can be directly connected or coupled to other elements, or can also there is intermediary element.Additionally, " connection " used herein or " coupling " can include wireless connections or couple.Wording "and/or" used herein includes one or more any cell listing item being associated and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technical term and scientific terminology) have with the those of ordinary skill in art of the present invention be commonly understood by identical meaning.Should also be understood that those terms defined in such as general dictionary should be understood that have the meaning consistent with the meaning in the context of prior art, and unless defined as here, will not explain by idealization or the most formal implication.
Fig. 2 shows antenna and the structural representation of RRU of multiple antennas TDD time-division system according to an embodiment of the present invention.As a kind of embodiment, as in figure 2 it is shown, TDD base station system uses 8 passage+1 calibrated channel designs, antenna system uses the design of 8 antennas+calibrated channel equally.For meeting power-balance required for smart antenna, delay measurements, need each radio-frequency channel is calibrated.During sending alignment, service aisle (RF passage 1-8 as shown in Figure 2), it is operated in emission state, calibrated channel (RFCAL as shown in Figure 2) is operated in reception state；During close alignment, service aisle is operated in reception state, and calibrated channel is operated in emission state.TDD system is calibrated 1 time the most per hour, and under remaining state, calibrated channel does not works.Therefore, based on this characteristic, the present invention proposes, and can carry out external interference detection in the interval (that is, when the calibrated channel RFCAL in RRU is in reception state) of system calibration, confirms external interference source and interference signal magnitude.Such as, when base station receives link obstructions, and speed declines when, software command opens Interference Detection, confirms interference source by Interference Detection, carries out network and reconfigure optimization.In this article, term " radio-frequency channel " is concept generally in the art, and term " service aisle " (RF passage as shown in Figure 2) refers to the radio-frequency channel of non-calibrated passage, term " calibrated channel " (RFCAL as shown in Figure 2) refers to the radio-frequency channel for carrying out RF calibration, therefore, inventionbroadly, calibrated channel is also radio-frequency channel.The RRU that the present invention provides detects the scheme of interference voluntarily, signal is disturbed to detect to external world by the calibrated channel in TDD antenna system, it is possible not only to reduce the setting of external testing environment, reduce the waste of manpower and financial resources, the detection of its exterior interference source can be carried out simultaneously at any time on the premise of not having sweep generator.
From the foregoing, it will be observed that the present invention is to carry out Interference Detection by the calibrated channel of TDD multiaerial system, owing to needs confirm interference source, it is accomplished by carrying out particular design for having the calibrated channel of radio frequency narrow band filter.Owing to RRU calibrated channel can have two kinds of designs: the first, receive in link and comprise narrow band filter；The second, reception link do not comprise narrow band filter.Therefore, for above two calibrated channel, the Interference Detection scheme that the present invention provides can also be respectively designed to the following two kinds mode: the first, calibrated channel has the design of radio-frequency filter；The second, calibrated channel do not have the design of radio-frequency filter.For the calibrated channel with radio-frequency filter, if Interference Detection to be realized, the design got around by bypass circuit by radio-frequency filter can be used, enable wide frequency interference signal to be converted into intermediate frequency by calibrated channel, in order to realize disturbing the location of signal by local oscillator frequency sweep.If calibrated channel does not natively have the design of narrow band filter, directly can complete to disturb the detection of signal by the function of software upgrading.
In order to realize the purpose of the present invention, embodiment of the present invention proposes the interference detection method of a kind of multi-antenna TDD system, as described in Figure 3, for the flow chart of the interference detection method of embodiment of the present invention multi-antenna TDD system, comprise the following steps: S110: by smart antenna receiver to radiofrequency signal be input to the calibrated channel in radio frequency remoto module (RRU)；S120: process radiofrequency signal by calibrated channel, and obtain the result of radiofrequency signal；S130: determine the relevant parameter of radiofrequency signal according to result.
The said method that the present invention proposes, it is possible to directly measure interference signal by verification passage.Such as, after determining the relevant parameter of radiofrequency signal of interference, network optimization personnel can be according to the relevant parameter of radiofrequency signal, and the interference source near lookup determines source and the position of external disturbance, provides for subsequent network optimization and supports.
As embodiments of the present invention, said method further comprises: judge whether calibrated channel is configured with radio-frequency filter；
When calibrated channel is configured with radio-frequency filter, bypass switching circuit is set at radio-frequency filter two ends, when processing radiofrequency signal by calibrated channel, Guan Bi switch, bypass radio-frequency filter so that pending radiofrequency signal is directly passed through.
Accordingly, as embodiments of the present invention, after calibrated channel does not have radio-frequency filter or bypassed by radio-frequency filter, process radiofrequency signal by calibrated channel, and obtain the result of radiofrequency signal, including:
The radiofrequency signal received is carried out signal attenuation via attenuator circuit；
Radiofrequency signal after overdamping is mixed with local oscillation signal, carries out down conversion process to be converted to intermediate-freuqncy signal；
Intermediate-freuqncy signal is sent to analog-digital converter (ADC) and carries out signal sampling, obtain frequency and/or the power of intermediate-freuqncy signal of intermediate-freuqncy signal according to signal sampling.
Thereafter, determine the relevant parameter of radiofrequency signal according to result, including:
Determine the frequency of radiofrequency signal, the frequency of the frequency+local oscillation signal of the frequency=intermediate-freuqncy signal of radiofrequency signal；And/or,
Determine the power of radiofrequency signal, the degree of coupling of the gain of the power-radio frequency link of the power=intermediate-freuqncy signal of radiofrequency signal+between calibrated channel and smart antenna.
Below in conjunction with the accompanying drawings, such scheme is further elaborated.
Fig. 4 shows the structural representation of the calibrated channel of configuration in RRU according to an embodiment of the present invention.As a kind of embodiment, as shown in Figure 4, when calibrated channel is configured with radio-frequency filter, in RRU, the calibrated channel of configuration may include that input, for receiving the radiofrequency signal as external disturbance that the radio-frequency channel in smart antenna detects；Attenuator circuit, for receiving the radiofrequency signal that receiving terminal passes over；By-pass switch, it includes the first end, the second end and the 3rd end, for the intermediate-freuqncy signal after conversion being bypassed to self oscillating mixer from radio-frequency filter；Self oscillating mixer, it includes mixing unit and oscillator unit, by mixing unit, the local oscillation signal that the radiofrequency signal after decay and oscillator unit provide is carried out Frequency mixing processing and be converted to intermediate-freuqncy signal；Analog-digital converter (ADC), for receiving the intermediate-freuqncy signal after mixing, and carries out sampling processing, to obtain frequency and the power of the intermediate-freuqncy signal after mixing；Wherein: the input of calibrated channel connects one end of attenuator circuit, the other end of attenuator circuit connects the first end of by-pass switch, second end of by-pass switch connects one end of radio-frequency filter, the other end of radio-frequency filter connects the first input end of the mixing unit in self oscillating mixer, oscillator unit connects the second input of the mixing unit in self oscillating mixer, the first input end of the mixing unit in the three-terminal link self oscillating mixer of by-pass switch, the outfan of mixing unit connects one end of ADC.
Fig. 5 shows the structural representation of the calibrated channel of configuration in the RRU according to another embodiment of the present invention.As a kind of embodiment, as it is shown in figure 5, when calibrated channel does not configures radio-frequency filter, in RRU, the calibrated channel of configuration includes: input, for receiving the radiofrequency signal as external disturbance that the radio-frequency channel in smart antenna detects；Attenuator circuit, for receiving the radiofrequency signal that receiving terminal passes over；Self oscillating mixer, it includes mixing unit and oscillator unit, by mixing unit, the local oscillation signal that the radiofrequency signal after decay and oscillator unit provide is carried out Frequency mixing processing and be converted to intermediate-freuqncy signal；Analog-digital converter (ADC), for receiving the intermediate-freuqncy signal after mixing, and carries out sampling processing, to obtain frequency and the power of the intermediate-freuqncy signal after mixing；Wherein: the receiving terminal of calibrated channel connects one end of attenuator circuit, the other end of attenuator circuit connects the first input end of the mixing unit in self oscillating mixer, oscillator unit connects the second input of the mixing unit in self oscillating mixer, and the outfan of mixing unit connects one end of ADC.
Fig. 6 shows the spectrogram of the intermediate-freuqncy signal through the output of ADC sampled signal according to an embodiment of the present invention, as shown in Figure 6, the interference detection method of a kind of multi-antenna TDD system that the present invention provides can measure in intermediate-freuqncy signal frequency and the power of the interference signal with spike.Fig. 7 shows that radiofrequency signal according to an embodiment of the present invention turns the process schematic diagram of intermediate-freuqncy signal, and radiofrequency signal is through being mixed with local oscillation signal, by exporting intermediate-freuqncy signal after digital IF filter.Due to mixing, the frequency=radio frequency signal frequency-local oscillation signal frequency of intermediate-freuqncy signal, by adjusting the frequency of local oscillation signal, and learn concrete IF-FRE according to adc data, can be inferred that radio frequency signal frequency, namely disturb the frequency of signal.Simultaneously can also be according to the data of ADC sampling, gain according to radio frequency link, the anti-interfering signal power shifting RRU radio frequency mouth onto, then shift, by the degree of coupling (such as, 25dB) between calibration antenna and smart antenna is counter, the interfering signal power that smart antenna receiver arrives onto.The signal detected from intermediate frequency, by the formula of mixing:
Freq(RF)=Freq(IF)+Freq(LO)；
The most anti-frequency that can be calculated radiofrequency signal that pushes away, the signal power that simultaneously can also detect according to intermediate frequency, the anti-interfering signal power level shifting antenna opening onto of formula converted by gain:
Power(RF)=Power(IF)-Gain+25dB；
Wherein: RF labelling is radio frequency, IF labelling is intermediate frequency, and LO labelling is local oscillator, and 25dB is the coupling value between calibration antenna and normal work antenna.
Such as, local oscillation signal frequency sweep function is controlled by the software of RRU, and the multiple of stepping 200KHz or 200KHz of the frequency of local oscillation signal, step size is determined by digital IF filter.Such as, due to TD-LTE digital intermediate frequency bandwidth 40M, local oscillation signal stepping just can be arranged according to 40M, and every 40M carries out power detection and once and records the interfering frequency and jamming power detected, until the full frequency band that antenna is supported has been swept.By carrying out data collection later, and distribute rationally according to disturbing data again network to be carried out frequency shift (FS), antenna distance increase etc..
Accordingly, as embodiments of the present invention, the frequency of local oscillation signal can be adjusted, measure smart antenna at the frequency of the radiofrequency signal of the full frequency band supported and/or the power of measurement radiofrequency signal.
Such as, local oscillation signal is designed as wideband local oscillator, supports 400-2800M, intermediate frequency 180M, can detect that the highest Radio Frequency Interfere is 2980MHz, the frequency of existing mobile communication substantially can be detected.Simultaneously, the frequency range that Interference Detection also can be supported by wide frequency antenna is limited, receiving just because of antenna in view of interference signal causes receiver to block, and can confirm that interference source completely, can solve thereafter by the way of the network optimization by the way of calibrated channel detects.
Therefore, as embodiments of the present invention, smart antenna can be measured at the frequency of the radiofrequency signal of the full frequency band supported and/or the power of measurement radiofrequency signal using the bandwidth of the digital IF filter of communication system as the step footpath size adjusting local oscillation signal frequency.
Additionally, as embodiments of the present invention, when calibrated channel is in the calibration intervals phase, verification passage utilizes said method disclosed by the invention, can detect the radiofrequency signal as external disturbance.
Further, the multiple antennas TDD time-division system that the present invention mentions includes but not limited to following system: use the TDD system with calibrated channel of TD-SCDMA, TD-LTE or TD-LTE-A standard.It is, the said method that the present invention proposes, it is used directly for using the TDD system with calibrated channel of TD-SCDMA, TD-LTE or TD-LTE-A standard.
From the foregoing, it will be observed that the interference detection method of the multi-antenna TDD system of present invention offer, it is possible to achieve easy detection outside radio frequency interference is originated, and provides for subsequent network optimization and supports.The method that the present invention provides can realize detecting voluntarily the scheme of interference in RRU, signal is disturbed to detect to external world by the calibrated channel in TDD antenna system, it is possible not only to reduce building of external testing environment, reduce the waste of manpower and financial resources, the detection of its exterior interference source can be carried out simultaneously at any time on the premise of not having sweep generator.
Correspondingly, as shown in Figure 8, embodiment of the present invention also proposed the interference detecting apparatus 800 of a kind of multi-antenna TDD system, and interference detecting apparatus 800 includes input 810, processing module 820 and computing module 830.
Specifically, the radiofrequency signal that input 810 arrives for the calibrated channel input smart antenna receiver in radio frequency remoto module (RRU)；
Processing module 820 is used for processing radiofrequency signal, and obtains the result of radiofrequency signal；
Computing module 830 for determining the relevant parameter of radiofrequency signal according to result.
As the embodiment of interference detecting apparatus 800, processing module 820 also includes: judge module,
Judge module, is used for judging whether calibrated channel is configured with radio-frequency filter；When calibrated channel is configured with radio-frequency filter, bypass switching circuit is set at radio-frequency filter two ends, when processing radiofrequency signal by calibrated channel, it is judged that module is used for closing switch, bypasses radio-frequency filter so that pending radiofrequency signal is directly passed through.
Furthermore, processing module 820 also includes: attenuator circuit, self oscillating mixer, analog-digital converter (ADC),
Attenuator circuit, for carrying out signal attenuation by the radiofrequency signal received via attenuator circuit；
Self oscillating mixer, for the radiofrequency signal after overdamping being mixed with local oscillation signal, carries out down conversion process to be converted to intermediate-freuqncy signal；
Analog-digital converter (ADC), carries out signal sampling for intermediate-freuqncy signal is sent to analog-digital converter (ADC), obtains frequency and/or the power of intermediate-freuqncy signal of intermediate-freuqncy signal according to signal sampling.
Specifically, in processing module 820, the annexation of each device is referred to Fig. 4 and Fig. 5 and explanatory note to Fig. 4 and Fig. 5 above.
Wherein, computing module 830 is used for determining the relevant parameter of radiofrequency signal according to result, including:
Computing module 830 is for determining the frequency of radiofrequency signal, the frequency of the frequency+local oscillation signal of the frequency=intermediate-freuqncy signal of radiofrequency signal；And/or,
Computing module 830 for determining the power of radiofrequency signal, the degree of coupling of the gain of the power-radio frequency link of the power=intermediate-freuqncy signal of radiofrequency signal+between calibrated channel and smart antenna.
Specifically, determine the principle of the relevant parameter of radiofrequency signal, be referred to Fig. 7 and explanatory note to Fig. 7 above.
As the embodiment of interference detecting apparatus 800, processing module 820 is further used for adjusting the frequency of local oscillation signal, measures smart antenna at the frequency of the radiofrequency signal of the full frequency band supported and/or the power of measurement radiofrequency signal.
Furthermore, processing module 820 is further used for the frequency adjusting local oscillation signal with a width of step footpath of the digital IF filter with communication system, measures smart antenna at the frequency of the radiofrequency signal of the full frequency band supported and/or the power of measurement radiofrequency signal.
In actual application, when calibrated channel is in the calibration intervals phase, interference detecting apparatus 800 is for detecting the radiofrequency signal as external disturbance.
As the embodiment of interference detecting apparatus 800, interference detecting apparatus 800 is applied to one of following system:
The TDD system with calibrated channel of TD-SCDMA, TD-LTE or TD-LTE-A standard of employing.
In concrete application, interference detecting apparatus 800 is typically integrated into RRU or is mainly built by calibrated channel.
From the foregoing, it will be observed that the interference detecting apparatus of the multi-antenna TDD system of present invention offer, it is possible to achieve easy detection outside radio frequency interference is originated, and provides for subsequent network optimization and supports.The device that the present invention provides can realize detecting voluntarily the scheme of interference in RRU, signal is disturbed to detect to external world by the calibrated channel in TDD antenna system, it is possible not only to reduce building of external testing environment, reduce the waste of manpower and financial resources, the detection of its exterior interference source can be carried out simultaneously at any time on the premise of not having sweep generator.
Those skilled in the art of the present technique are appreciated that the present invention can relate to perform the equipment of the one or more operation in operation described herein.Described equipment can be required purpose and specialized designs and manufacture, or can also include the known device in general purpose computer, and described general purpose computer activates or reconstructs with having storage procedure Selection within it.Such computer program can be stored in equipment (such as, computer) in computer-readable recording medium or be stored in and be suitable to store e-command and be coupled to any kind of medium of bus respectively, described computer-readable medium includes but not limited to any kind of dish (including floppy disk, hard disk, CD, CD-ROM and magneto-optic disk), immediately memorizer (RAM), read only memory (ROM), electrically programmable ROM, electrically erasable ROM(EPROM), electrically erasable ROM(EEPROM), flash memory, magnetic card or light card.Computer-readable recording medium includes for be stored by the form that equipment (such as, computer) is readable or any mechanism of transmission information.Such as, computer-readable recording medium includes memorizer (RAM) immediately, read only memory (ROM), magnetic disk storage medium, optical storage medium, flash memory device, the signal (such as carrier wave, infrared signal, digital signal) etc. propagated with electricity, light, sound or other form.
Those skilled in the art of the present technique are appreciated that the combination of the frame in each frame and these structure charts and/or block diagram and/or flow graph that can realize in these structure charts and/or block diagram and/or flow graph with computer program instructions.These computer program instructions can be supplied to the processor of general purpose computer, special purpose computer or other programmable data processing methods to generate machine, thus the instruction performed by the processor of computer or other programmable data processing methods creates the method specified in the frame for realizing structure chart and/or block diagram and/or flow graph or multiple frame.
Those skilled in the art of the present technique are appreciated that the step in the various operations discussed in the present invention, method, flow process, measure, scheme can be replaced, change, combine or delete.Further, have the various operations discussed in the present invention, method, other steps in flow process, measure, scheme can also be replaced, changed, reset, decomposed, combined or deleted.Further, of the prior art have can also be replaced with the step in the various operations disclosed in the present invention, method, flow process, measure, scheme, changed, reset, decomposed, combined or deleted.
The above is only the some embodiments of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (14)
1. the interference detection method of a multi-antenna TDD system, it is characterised in that comprise the following steps:
Using smart antenna receiver to the radiofrequency signal as external disturbance be input to the calibrated channel in radio frequency remoto module (RRU)；
Process described radiofrequency signal by described calibrated channel, and obtain the result of described radiofrequency signal, including: the described radiofrequency signal received is carried out signal attenuation via attenuator circuit；Described radiofrequency signal after overdamping is mixed with local oscillation signal, carries out down conversion process to be converted to intermediate-freuqncy signal；Described intermediate-freuqncy signal is sent to analog-digital converter (ADC) and carries out signal sampling, obtain frequency and/or the power of described intermediate-freuqncy signal of described intermediate-freuqncy signal according to described signal sampling；
The relevant parameter of described radiofrequency signal is determined according to described result.
2. interference detection method as claimed in claim 1, it is characterised in that also include: judge whether described calibrated channel is configured with radio-frequency filter；
When described calibrated channel is configured with radio-frequency filter, bypass switching circuit is set at described radio-frequency filter two ends, when processing described radiofrequency signal by described calibrated channel, closes described switch, bypass described radio-frequency filter so that pending described radiofrequency signal is directly passed through.
3. interference detection method as claimed in claim 1, it is characterised in that determine the relevant parameter of described radiofrequency signal according to described result, including:
Determine the frequency of described radiofrequency signal, the frequency of the frequency+local oscillation signal of the frequency of described radiofrequency signal=described intermediate-freuqncy signal；And/or,
Determine the power of described radiofrequency signal, the degree of coupling of the gain of the power-radio frequency link of the power of described radiofrequency signal=described intermediate-freuqncy signal+between calibrated channel and smart antenna.
4. interference detection method as claimed in claim 1, it is characterised in that adjust the frequency of described local oscillation signal, measures smart antenna at the frequency of the described radiofrequency signal of the full frequency band supported and/or the power of measuring described radiofrequency signal.
5. interference detection method as claimed in claim 4, it is characterized in that, with the frequency adjusting described local oscillation signal with a width of step footpath of the digital IF filter of communication system, measure smart antenna at the frequency of the described radiofrequency signal of the full frequency band supported and/or the power of measuring described radiofrequency signal.
6. interference detection method as claimed in claim 1, it is characterised in that when described calibrated channel is in the calibration intervals phase, detect the described radiofrequency signal as external disturbance.
7. interference detection method as claimed in claim 1, it is characterised in that described multiple antennas TDD time-division system is one of following system:
The TDD system with calibrated channel of TD-SCDMA, TD-LTE or TD-LTE-A standard of employing.
8. the interference detecting apparatus of a multi-antenna TDD system, it is characterised in that include input, processing module and computing module,
Described input, the radiofrequency signal as external disturbance arrived for the calibrated channel input smart antenna receiver in radio frequency remoto module (RRU)；
Described processing module, is used for processing described radiofrequency signal, and obtains the result of described radiofrequency signal；Described processing module also includes: attenuator circuit, self oscillating mixer, analog-digital converter (ADC),
Described attenuator circuit, for carrying out signal attenuation by the described radiofrequency signal received via attenuator circuit；
Described self oscillating mixer, for the described radiofrequency signal after overdamping being mixed with local oscillation signal, carries out down conversion process to be converted to intermediate-freuqncy signal；
Described analog-digital converter (ADC), carries out signal sampling for described intermediate-freuqncy signal is sent to analog-digital converter (ADC), obtains frequency and/or the power of described intermediate-freuqncy signal of described intermediate-freuqncy signal according to described signal sampling；
Described computing module, for determining the relevant parameter of described radiofrequency signal according to described result.
9. interference detecting apparatus as claimed in claim 8, it is characterised in that described processing module also includes: judge module,
Described judge module, is used for judging whether described calibrated channel is configured with radio-frequency filter；
When described calibrated channel is configured with radio-frequency filter, at described radio-frequency filter two ends, bypass switching circuit is set, when processing described radiofrequency signal by described calibrated channel, described judge module is used for closing described switch, bypass described radio-frequency filter so that pending described radiofrequency signal is directly passed through.
10. interference detecting apparatus as claimed in claim 8, it is characterised in that described computing module is used for determining the relevant parameter of described radiofrequency signal according to described result, including:
Described computing module is for determining the frequency of described radiofrequency signal, the frequency of the frequency+local oscillation signal of the frequency of described radiofrequency signal=described intermediate-freuqncy signal；And/or,
Described computing module for determining the power of described radiofrequency signal, the degree of coupling of the gain of the power-radio frequency link of the power of described radiofrequency signal=described intermediate-freuqncy signal+between calibrated channel and smart antenna.
11. interference detecting apparatus as claimed in claim 8, it is characterized in that, described processing module is further used for adjusting the frequency of described local oscillation signal, measures smart antenna at the frequency of the described radiofrequency signal of the full frequency band supported and/or the power of measuring described radiofrequency signal.
12. interference detecting apparatus as claimed in claim 11, it is characterized in that, described processing module is further used for the frequency adjusting described local oscillation signal with a width of step footpath of the digital IF filter with communication system, measures smart antenna and in the frequency of the described radiofrequency signal of the full frequency band supported and/or measures the power of described radiofrequency signal.
13. interference detecting apparatus as claimed in claim 8, it is characterised in that when calibrated channel is in the calibration intervals phase, described interference detecting apparatus is for detecting the described radiofrequency signal as external disturbance.
14. interference detecting apparatus as claimed in claim 8, it is characterised in that described interference detecting apparatus is applied to one of following system:
The TDD system with calibrated channel of TD-SCDMA, TD-LTE or TD-LTE-A standard of employing.
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| CN104902505B (en) * | 2014-03-05 | 2019-01-01 | 中国移动通信集团公司 | Interference detection method and device, interference elimination method, apparatus and system |
| CN106033971B (en) * | 2015-03-18 | 2018-11-13 | 成都鼎桥通信技术有限公司 | A kind of the space interference automatic testing method and equipment of RRU |
| CN113315592A (en) * | 2020-02-26 | 2021-08-27 | 大唐移动通信设备有限公司 | Interference measurement method and device, network side equipment and terminal |
| CN111398678B (en) * | 2020-04-22 | 2022-04-05 | 航天恒星科技有限公司 | Method and device for testing carrier crosstalk inhibition index of satellite-borne phased-array antenna |
| CN113109634B (en) * | 2021-05-07 | 2023-07-21 | 北京和德宇航技术有限公司 | Antenna test method, device, terminal equipment, antenna test system and medium |
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