CN103532601A - Interference detection method and device of multi-antenna TDD system - Google Patents
Interference detection method and device of multi-antenna TDD system Download PDFInfo
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Abstract
The invention provides an interference detection method of a multi-antenna TDD (Time Division Duplex) system, which comprises the following steps of inputting a radio-frequency signal received by an intelligent antenna into a calibration channel in a remote radio module, processing the radio-frequency signal with the calibration channel, obtaining a processing result of the radio-frequency signal, and determining a corresponding parameter of the radio-frequency signal according to the processing result. The invention further provides an interference detection device of the multi-antenna TDD system. The interference detection method and the device of the multi-antenna TDD system can realize convenient and quick detection of radio frequency interference from the outside, so that blocking removal of a receiving end is facilitated, external interference removal by a network optimization mode is facilitated, the problems of manpower waste and low efficiency in an interference detection means in the prior art are solved, and the support is provided for subsequent network optimization.
Description
Technical field
The present invention relates to wireless communication technology field, particularly, the present invention relates to a kind of interference detection method and device of many antennas TDD system.
Background technology
In recent years, because distributed base station has the advantages such as low cost, environmental suitability is strong, engineering construction is convenient, the framework of wireless communication system is just rapidly towards distributed base station future development, especially in the 3G mobile network who is building at present, distributed base station has obtained applying very 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, for terminal use provides many new business, comprises visual telephone, video flowing, game, MMS, E-mail, Web etc.Along with 3G network construction enters high-speed development period, operator, to quick, flexible, the low-cost requirement of disposing of its network, also makes moving distributing base station as a kind of new base station mode, become gradually trend and the main flow of networking.
Distributed base station is divided into two functional modules traditional macro base station equipment according to function, wherein: the functions such as the base band of base station, master control, transmission, clock are integrated in to one and call Base Band Unit BBU (Base Band Unit, BBU) in module, Base Band Unit BBU volume is little, installation site is very flexible; The intermediate frequencies such as transceiver, power amplifier, RF Components are integrated in the module that another one calls radio frequency remote unit RRU (Remote Radio Unit, RRU), and radio frequency remote unit RRU is arranged on antenna end.Between radio frequency unit and Base Band Unit, by optical fiber, be connected, form brand-new distributed base station solution.Therefore, the core concept of distributed base station structure is that traditional macro base station baseband processing unit (BBU) is separated with RF processing unit (RRU), 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, by optical fiber, be connected with the Remote Radio Unit of planning website deploy, complete the network coverage, thereby reduction is built maintenance cost, is raised the efficiency.
Because base station distribution has relative dispersion, in the complex environment of outfield, base station system can receive the interference from other system, causes base station to work.When investigation is disturbed source, because external field environment is complicated, staff directly carries sweep generator test interference signal source, needs test antenna, tests auxiliary material, testing power supply, test instrumentation build testing environment.A large amount of manpowers, financial resources have been wasted in building of testing environment, and detection efficiency is low, expends the plenty of time.Further, due to complexity and the diversity of outfield testing environment, larger interference and operational inconvenience are brought in the location during for detection.As shown in Figure 1, for measuring the schematic diagram of outfield, base station interference signal.Conventionally, the interference signal measuring from sweep generator can be very mixed and disorderly, because external field environment is very complicated, the in the situation that of the serious interference of this outfield, new site and interference analysis all need to build test environment and carry out spectrum measurement, are not only subject to the restriction of place and manpower, are also subject to instrument and test the restriction of auxiliary material.
Therefore,, for existing many antennas TDD time-division system, be necessary to propose a kind of efficient, automatic interference detection method and device, to solve waste of manpower and inefficient problem in existing Interference Detection means.
Summary of the invention
Object of the present invention aims to provide a kind of interference detecting apparatus and method of many antennas TDD time-division system, to realize the easy detection to the radio frequency interference from outside, thereby being conducive to realize eliminating receiving terminal blocks, contribute to get rid of external disturbance by network optimization mode, to solve waste of manpower and inefficient problem in Interference Detection means of the prior art.
Embodiment of the present invention provides a kind of interference detection method of many antennas TDD system on the one hand, comprises the following steps:
By smart antenna receiver to radiofrequency signal be input to the calibrated channel in radio frequency remoto module (RRU);
By described calibrated channel, process described radiofrequency signal, and obtain the result of described radiofrequency signal;
According to described result, determine the relevant parameter of described radiofrequency signal.
Embodiment of the present invention provides a kind of interference detecting apparatus of many antennas TDD system on the other hand, comprises input, processing module and computing module,
Described input, the radiofrequency signal arriving for the calibrated channel input smart antenna receiver to radio frequency remoto module (RRU);
Described processing module, for the treatment of 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.
Interference detecting apparatus and the method for many antennas TDD time-division system provided by the invention, can realize the easy detection to the radio frequency interference from outside, thereby being conducive to realize eliminating receiving terminal blocks, contribute to get rid of external disturbance by network optimization mode, to solve waste of manpower and inefficient problem in Interference Detection means of the prior art, for subsequent network optimization provides support.In addition, the such scheme that the present invention proposes, very little to the change of existing system, can not affect the compatibility of equipment, and realize simple, efficient.
The aspect that the present invention is additional and advantage in the following description part provide, and these will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage obviously and are easily understood becoming in the description of execution mode below in conjunction with accompanying drawing, wherein:
Fig. 1 shows the schematic diagram of measuring outfield, base station interference signal;
Fig. 2 shows the antenna of many antennas TDD time-division system according to an embodiment of the present invention and the structural representation of RRU;
Fig. 3 shows the flow chart of the interference detection method of many antennas TDD time-division system according to an embodiment of the present invention;
Fig. 4 shows the structural representation of the calibrated channel configuring in RRU according to an embodiment of the present invention;
Fig. 5 shows the structural representation of the calibrated channel configuring in the RRU of another execution mode according to 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 the processing schematic diagram that radiofrequency signal according to an embodiment of the present invention turns intermediate-freuqncy signal;
Fig. 8 shows the structural representation of the interference detecting apparatus of many antennas TDD time-division system according to an embodiment of the present invention.
Embodiment
Describe embodiments of the present invention below in detail, the example of described execution mode is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the execution mode being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Unless those skilled in the art of the present technique are appreciated that specially statement, singulative used herein " ", " one ", " described " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording of using in specification of the present invention " comprises " and refers to and have described feature, integer, step, operation, element and/or assembly, but do not get rid of, do not exist or adds one or more other features, integer, step, operation, element, assembly and/or their group.Should be appreciated that, when we claim element to be " connected " or " coupling " when another element, it can be directly connected or coupled to other elements, or also can have intermediary element.In addition, " connection " used herein or " coupling " can comprise wireless connections or couple.Wording "and/or" used herein comprises arbitrary unit of listing item and all combinations that one or more is associated.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have with the present invention under the identical meaning of the general understanding of those of ordinary skill in field.Should also be understood that such as those terms that define in general dictionary and should be understood to have the consistent meaning of meaning in the context with prior art, unless and definition as here, can not explain by idealized or too formal implication.
Fig. 2 shows the antenna of many antennas TDD time-division system according to an embodiment of the present invention and the structural representation of RRU.As a kind of execution mode, as shown in Figure 2, TDD base station system adopts 8 passage+1 calibrated channel designs, and antenna system adopts the design of 8 antennas+calibrated channel equally.For meeting the needed power-balance of smart antenna, delay measurements, need to calibrate each radio-frequency channel.During sending alignment, service aisle (RF passage 1-8 as shown in Figure 2), is operated in emission state, and calibrated channel (RF CAL as shown in Figure 2) is operated in accepting state; During close alignment, service aisle is operated in accepting state, and calibrated channel is operated in emission state.The calibration per hour 1 time under normal operation of TDD system, under all the other states, calibrated channel is not worked.Therefore, based on this characteristic, the present invention proposes, and can carry out external interference detection in the interval of system calibration (that is, the calibrated channel RF CAL in RRU is when accepting state), confirms external interference source and interference signal size.For example, when base station receiver blocks, when speed declines, software command is opened Interference Detection, by Interference Detection, confirms to disturb source, carries out network and reconfigures optimization.In this article, term " the general concept in ”Shi this area, radio-frequency channel, and term " service aisle " (RF passage as shown in Figure 2) refers to the radio-frequency channel of non-calibrated channel, term " calibrated channel " (RF CAL as shown in Figure 2) refers to for carrying out the radio-frequency channel of RF calibration, therefore, broadly say, calibrated channel is also radio-frequency channel.RRU provided by the invention detects the scheme of interference voluntarily, by the calibrated channel in TDD antenna system, come interference signal to external world to detect, not only can reduce the setting of external testing environment, reduce the waste of manpower and financial resources, simultaneously can be at any time in the detection that there is no to carry out under the prerequisite of sweep generator system external interference source.
As from the foregoing, the present invention is that the calibrated channel by TDD multiaerial system carries out Interference Detection, because needs are confirmed to disturb source, for the calibrated channel with radio frequency narrow band filter, just need to carry out particular design.Because RRU calibrated channel can have two kinds of designs: comprise narrow band filter in the first, receiver; The second, receiver do not comprise narrow band filter.Therefore,, for above-mentioned two kinds of calibrated channels, Interference Detection scheme provided by the invention also can be designed to respectively following two kinds of modes: in the first, calibrated channel, have the design of radio-frequency filter; In the second, calibrated channel, there is no the design of radio-frequency filter.For the calibrated channel with radio-frequency filter, if realize Interference Detection, can adopt the design that radio-frequency filter is got around by bypass circuit, make wideband interference signal convert intermediate frequency to by calibrated channel, to realize the location of interference signal by local oscillator frequency sweep.If calibrated channel did not just have the design of narrow band filter originally, can directly by the function of software upgrading, complete the detection of interference signal.
In order to realize object of the present invention, embodiment of the present invention has proposed a kind of interference detection method of many antennas TDD system, as described in Figure 3, flow chart for the interference detection method of many antennas of embodiment of the present invention TDD system, comprises 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: the relevant parameter of determining radiofrequency signal according to result.
The said method that the present invention proposes, can be by the direct measurements interference signal of verification passage.For example, after having determined the relevant parameter of the radiofrequency signal of disturbing, network optimization personnel can search near interference source according to the relevant parameter of radiofrequency signal, determine source and the position of external disturbance, for subsequent network optimization provides support.
As embodiments of the present invention, said method further comprises: judge whether calibrated channel disposes radio-frequency filter;
When calibrated channel disposes radio-frequency filter, at radio-frequency filter two ends, by-pass switch circuit is set, while processing radiofrequency signal by calibrated channel, Closing Switch, bypass radio-frequency filter, directly passes through pending radiofrequency signal.
Therefore, as embodiments of the present invention, when calibrated channel do not there is radio-frequency filter or by radio-frequency filter bypass after, by calibrated channel, process radiofrequency signal, and obtain the result of radiofrequency signal, comprising:
The radiofrequency signal receiving is carried out to signal attenuation via attenuator circuit;
By the radiofrequency signal after overdamping and local oscillation signal mixing, carry out down conversion process to be converted to intermediate-freuqncy signal;
Intermediate-freuqncy signal is sent to analog to digital converter (ADC) and carries out signal sampling, according to signal sampling, obtain the power of frequency and/or the intermediate-freuqncy signal of intermediate-freuqncy signal.
, according to result determine the relevant parameter of radiofrequency signal, comprising thereafter:
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 gain+calibrated channel of the power-radio frequency link of the power=intermediate-freuqncy signal of radiofrequency signal and the degree of coupling between smart antenna.
Below in conjunction with accompanying drawing, such scheme is further elaborated.
Fig. 4 shows the structural representation of the calibrated channel configuring in RRU according to an embodiment of the present invention.As a kind of execution mode, as shown in Figure 4, when calibrated channel disposes radio-frequency filter, the calibrated channel configuring in RRU can comprise: input, the radiofrequency signal as external disturbance detecting for receiving the radio-frequency channel of smart antenna; Attenuator circuit, the radiofrequency signal passing over for receiving receiving terminal; By-pass switch, it comprises first end, the second end and the 3rd end, for by conversion after intermediate-freuqncy signal from radio-frequency filter bypass to self oscillating mixer; Self oscillating mixer, it comprises mixing unit and oscillator unit, by mixing unit, the radiofrequency signal after decay and the local oscillation signal that provides of oscillator unit is carried out to Frequency mixing processing and is converted to intermediate-freuqncy signal; Analog to 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, the 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 3rd end of by-pass switch connects the first input end of the mixing unit in self oscillating mixer, and the output of mixing unit connects one end of ADC.
Fig. 5 shows the structural representation of the calibrated channel configuring in the RRU of another execution mode according to the present invention.As a kind of execution mode, as shown in Figure 5, when calibrated channel does not configure radio-frequency filter, the calibrated channel configuring in RRU comprises: input, the radiofrequency signal as external disturbance detecting for receiving the radio-frequency channel of smart antenna; Attenuator circuit, the radiofrequency signal passing over for receiving receiving terminal; Self oscillating mixer, it comprises mixing unit and oscillator unit, by mixing unit, the radiofrequency signal after decay and the local oscillation signal that provides of oscillator unit is carried out to Frequency mixing processing and is converted to intermediate-freuqncy signal; Analog to 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 output 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 many antennas TDD system provided by the invention can be measured frequency and the power of the interference signal in intermediate-freuqncy signal with spike.Fig. 7 shows the processing schematic diagram that radiofrequency signal according to an embodiment of the present invention turns intermediate-freuqncy signal, radiofrequency signal through and local oscillation signal mixing, by exporting intermediate-freuqncy signal after digital IF filter.Due to mixing, the frequency=radio frequency signal frequency of intermediate-freuqncy signal-local oscillation signal frequency, by adjusting the frequency of local oscillation signal, and learns concrete IF-FRE according to adc data, can infer radio frequency signal frequency, namely the frequency of interference signal.Simultaneously also can be according to the data of ADC sampling, according to the gain of radio frequency link, the counter interfering signal power of shifting RRU radio frequency mouth onto, then (for example, 25dB) instead shift the interfering signal power that smart antenna receiver arrives onto by the degree of coupling between boresight antenna and smart antenna.The signal detecting from intermediate frequency, by the formula of mixing:
Freq(RF)=Freq(IF)+Freq(LO) ；
The anti-frequency that can calculate radiofrequency signal that pushes away again, the signal power that also can detect according to intermediate frequency simultaneously, the counter interfering signal power level of shifting antenna opening onto of formula converting by gain:
Power(RF)=Power(IF)-Gain+25dB ；
Wherein: RF mark be radio frequency, IF mark be intermediate frequency, LO mark be local oscillator, 25dB is boresight antenna and the coupling value of normal operation between antenna.
For example, local oscillation signal frequency sweep function is by the software control of RRU, the stepping 200KHz of the frequency of local oscillation signal or the multiple of 200KHz, and step size is determined by digital IF filter.For example, due to TD-LTE digital intermediate frequency bandwidth 40M, local oscillation signal stepping just can arrange according to 40M, and every 40M carries out power detection once and record detects interfering frequency and interference power, until the full frequency band that antenna is supported has been swept.By carrying out afterwards Data Collection, and according to interfering data, again network is carried out to frequency shift (FS), antenna distance increase etc. and distribute rationally.
Therefore, as embodiments of the present invention, can adjust the frequency of local oscillation signal, measure smart antenna at the power of the frequency of the radiofrequency signal of supported full frequency band and/or measurement radiofrequency signal.
For example, local oscillation signal is designed to wideband local oscillator, supports 400-2800M, intermediate frequency 180M, and the highest Radio Frequency Interfere can be detected is 2980MHz, the frequency of existing mobile communication substantially can be detected.Simultaneously, the frequency range that Interference Detection can be supported by wide frequency antenna also limits, consider that interference signal gets off to cause that just because of antenna reception receiver blocks, the mode detecting by calibrated channel can be confirmed to disturb source completely, can solve by the mode of the network optimization thereafter.
Therefore, as embodiments of the present invention, can, using the bandwidth of the digital IF filter of communication system as the step footpath size of adjusting local oscillation signal frequency, measure smart antenna at the power of the frequency of the radiofrequency signal of supported full frequency band and/or measurement radiofrequency signal.
In addition,, as embodiments of the present invention, at calibrated channel, in calibration intervals during the phase, verification passage utilizes said method disclosed by the invention, can detect the radiofrequency signal as external disturbance.
Further, many antennas TDD time-division system that the present invention mentions includes but not limited to following system: the TDD system with calibrated channel that adopts TD-SCDMA, TD-LTE or TD-LTE-A standard.Namely, the said method that the present invention proposes, can be directly used in the TDD system with calibrated channel that adopts TD-SCDMA, TD-LTE or TD-LTE-A standard.
As from the foregoing, the interference detection method of many antennas TDD system provided by the invention, can realize easy detection outside radio frequency interference source, for subsequent network optimization provides support.Method provided by the invention can realize the scheme of disturbing that detects voluntarily in RRU, by the calibrated channel in TDD antenna system, come interference signal to external world to detect, not only can reduce building of external testing environment, reduce the waste of manpower and financial resources, simultaneously can be at any time in the detection that there is no to carry out under the prerequisite of sweep generator system external interference source.
Correspondingly, as shown in Figure 8, embodiment of the present invention has also proposed a kind of interference detecting apparatus 800 of many antennas TDD system, and interference detecting apparatus 800 comprises input 810, processing module 820 and computing module 830.
Particularly, the radiofrequency signal that input 810 arrives for the calibrated channel input smart antenna receiver to radio frequency remoto module (RRU);
Processing module 820 is for the treatment of radiofrequency signal, and obtains the result of radiofrequency signal;
Computing module 830 is for determining the relevant parameter of radiofrequency signal according to result.
As the execution mode of interference detecting apparatus 800, processing module 820 also comprises: judge module,
Judge module, for judging whether calibrated channel disposes radio-frequency filter; When calibrated channel disposes radio-frequency filter, at radio-frequency filter two ends, by-pass switch circuit is set, while processing radiofrequency signal by calibrated channel, judge module is for Closing Switch, and bypass radio-frequency filter, directly passes through pending radiofrequency signal.
Furthermore, processing module 820 also comprises: attenuator circuit, self oscillating mixer, analog to digital converter (ADC),
Attenuator circuit, for carrying out signal attenuation by the radiofrequency signal receiving via attenuator circuit;
Self oscillating mixer, for by the radiofrequency signal after overdamping and local oscillation signal mixing, carries out down conversion process to be converted to intermediate-freuqncy signal;
Analog to digital converter (ADC), carries out signal sampling for intermediate-freuqncy signal being sent to analog to digital converter (ADC), obtains the power of frequency and/or the intermediate-freuqncy signal of intermediate-freuqncy signal according to signal sampling.
Particularly, in processing module 820, the annexation of each device can be with reference to figure 4 and Fig. 5 and the explanatory note to Fig. 4 and Fig. 5 above.
Wherein, computing module 830 comprises the relevant parameter of radiofrequency signal for determining according to result:
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 is for determining the power of radiofrequency signal, the gain+calibrated channel of the power-radio frequency link of the power=intermediate-freuqncy signal of radiofrequency signal and the degree of coupling between smart antenna.
Particularly, determine the principle of the relevant parameter of radiofrequency signal, can be with reference to figure 7 and the explanatory note to Fig. 7 above.
As the execution mode of interference detecting apparatus 800, processing module 820 is further used for adjusting the frequency of local oscillation signal, measures smart antenna at the power of the frequency of the radiofrequency signal of supported full frequency band and/or measurement radiofrequency signal.
Furthermore, the bandwidth that processing module 820 is further used for take the digital IF filter of communication system is the frequency that local oscillation signal is adjusted in step footpath, measures smart antenna in the frequency of the radiofrequency signal of supported full frequency band and/or measures the power of radiofrequency signal.
In actual application, at calibrated channel, in calibration intervals during the phase, interference detecting apparatus 800 is for detection of the radiofrequency signal as external disturbance.
As the execution mode of interference detecting apparatus 800, interference detecting apparatus 800 is applied to one of following system:
Adopt the TDD system with calibrated channel of TD-SCDMA, TD-LTE or TD-LTE-A standard.
In concrete application, interference detecting apparatus 800 is conventionally integrated in RRU or mainly by calibrated channel, is built.
As from the foregoing, the interference detecting apparatus of many antennas TDD system provided by the invention, can realize easy detection outside radio frequency interference source, for subsequent network optimization provides support.Device provided by the invention can be realized the scheme of disturbing that detects voluntarily in RRU, by the calibrated channel in TDD antenna system, come interference signal to external world to detect, not only can reduce building of external testing environment, reduce the waste of manpower and financial resources, simultaneously can be at any time in the detection that there is no to carry out under the prerequisite of sweep generator system external interference source.
Those skilled in the art of the present technique are appreciated that the present invention can relate to for carrying out the equipment of the one or more operation of operation described in the application.Described equipment can be required object specialized designs and manufacture, or also can comprise the known device in all-purpose computer, and described all-purpose computer has storage procedure Selection within it and activates or reconstruct.Such computer program (for example can be stored in equipment, computer), in computer-readable recording medium or be stored in the medium of any type that is suitable for store electrons instruction and is coupled to respectively bus, described computer-readable medium includes but not limited to the dish (comprising floppy disk, hard disk, CD, CD-ROM and magneto optical disk) of any type, memory (RAM), read-only memory (ROM), electrically programmable ROM, electric erasable ROM(EPROM immediately), electrically erasable ROM(EEPROM), flash memory, magnetic card or light card.Computer-readable recording medium comprises for any mechanism with for example, by the storage of the readable form of equipment (, computer) or transmission information.For example, computer-readable recording medium comprises memory (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) propagated with electricity, light, sound or other form etc.
Those skilled in the art of the present technique are appreciated that and can realize each frame in these structure charts and/or block diagram and/or flow graph and the combination of the frame in these structure charts and/or block diagram and/or flow graph with computer program instructions.The processor that these computer program instructions can be offered to all-purpose computer, special purpose computer or other programmable data processing methods generates machine, thereby the instruction of carrying out by the processor of computer or other programmable data processing methods has created for the frame of implementation structure figure and/or block diagram and/or flow graph or the method for a plurality of frame appointments.
Those skilled in the art of the present technique be appreciated that step in the various operations discussed in the present invention, method, flow process, measure, scheme can by alternately, change, combination or delete.Further, have other steps in the various operations discussed in the present invention, method, flow process, measure, scheme also can by alternately, change, reset, decompose, combination or delete.Further, of the prior art have with the present invention in step in disclosed various operations, method, flow process, measure, scheme also can by alternately, change, reset, decompose, combination or delete.
The above is only part execution mode 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 considered as protection scope of the present invention.
Claims (16)
1. an interference detection method for the TDD of antenna more than system, is characterized in that, comprises the following steps:
By smart antenna receiver to radiofrequency signal be input to the calibrated channel in radio frequency remoto module (RRU);
By described calibrated channel, process described radiofrequency signal, and obtain the result of described radiofrequency signal;
According to described result, determine the relevant parameter of described radiofrequency signal.
2. interference detection method as claimed in claim 1, is characterized in that, also comprises: judge whether described calibrated channel disposes radio-frequency filter;
When described calibrated channel disposes radio-frequency filter, at described radio-frequency filter two ends, by-pass switch circuit is set, while processing described radiofrequency signal by described calibrated channel, closed described switch, radio-frequency filter described in bypass, directly passes through pending described radiofrequency signal.
3. the interference detection method as described in claim 2 or 1, is characterized in that, by described calibrated channel, processes described radiofrequency signal, and obtains the result of described radiofrequency signal, comprising:
The described radiofrequency signal receiving is carried out to signal attenuation via attenuator circuit;
By the described radiofrequency signal after overdamping and local oscillation signal mixing, carry out down conversion process to be converted to intermediate-freuqncy signal;
Described intermediate-freuqncy signal is sent to analog to digital converter (ADC) and carries out signal sampling, according to described signal sampling, obtain the power of frequency and/or the described intermediate-freuqncy signal of described intermediate-freuqncy signal.
4. interference detection method as claimed in claim 3, is characterized in that, determines the relevant parameter of described radiofrequency signal according to described result, comprising:
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 gain+calibrated channel of the power-radio frequency link of the power of described radiofrequency signal=described intermediate-freuqncy signal and the degree of coupling between smart antenna.
5. interference detection method as claimed in claim 3, is characterized in that, adjusts the frequency of described local oscillation signal, measures smart antenna in the frequency of the described radiofrequency signal of supported full frequency band and/or measures the power of described radiofrequency signal.
6. interference detection method as claimed in claim 5, it is characterized in that, the bandwidth of digital IF filter of communication system of take is adjusted the frequency of described local oscillation signal as step footpath, measures smart antenna in the frequency of the described radiofrequency signal of supported full frequency band and/or measures the power of described radiofrequency signal.
7. interference detection method as claimed in claim 1, is characterized in that, at described calibrated channel, in calibration intervals, during the phase, detects the described radiofrequency signal as external disturbance.
8. interference detection method as claimed in claim 1, is characterized in that, described many antennas TDD time-division system is one of following system:
Adopt the TDD system with calibrated channel of TD-SCDMA, TD-LTE or TD-LTE-A standard.
9. an interference detecting apparatus for the TDD of antenna more than system, is characterized in that, comprises input, processing module and computing module,
Described input, the radiofrequency signal arriving for the calibrated channel input smart antenna receiver to radio frequency remoto module (RRU);
Described processing module, for the treatment of 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.
10. interference detecting apparatus as claimed in claim 9, is characterized in that, described processing module also comprises: judge module,
Described judge module, for judging whether described calibrated channel disposes radio-frequency filter;
When described calibrated channel disposes radio-frequency filter, at described radio-frequency filter two ends, by-pass switch circuit is set, while processing described radiofrequency signal by described calibrated channel, described judge module is for closed described switch, radio-frequency filter described in bypass, directly passes through pending described radiofrequency signal.
11. interference detecting apparatus as described in claim 10 or 9, is characterized in that, described processing module also comprises: attenuator circuit, self oscillating mixer, analog to digital converter (ADC),
Described attenuator circuit, for carrying out signal attenuation by the described radiofrequency signal receiving via attenuator circuit;
Described self oscillating mixer, for by the described radiofrequency signal after overdamping and local oscillation signal mixing, carries out down conversion process to be converted to intermediate-freuqncy signal;
Described analog to digital converter (ADC), carries out signal sampling for described intermediate-freuqncy signal being sent to analog to digital converter (ADC), obtains the power of frequency and/or the described intermediate-freuqncy signal of described intermediate-freuqncy signal according to described signal sampling.
12. interference detecting apparatus as claimed in claim 11, is characterized in that, described computing module comprises the relevant parameter of described radiofrequency signal for determining according to described result:
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 is for determining the power of described radiofrequency signal, the gain+calibrated channel of the power-radio frequency link of the power of described radiofrequency signal=described intermediate-freuqncy signal and the degree of coupling between smart antenna.
13. interference detecting apparatus as claimed in claim 11, it is characterized in that, described processing module is further used for adjusting the frequency of described local oscillation signal, measures smart antenna in the frequency of the described radiofrequency signal of supported full frequency band and/or measures the power of described radiofrequency signal.
14. interference detecting apparatus as claimed in claim 13, it is characterized in that, described processing module is further used for take the bandwidth of the digital IF filter of communication system and as step footpath, adjusts the frequency of described local oscillation signal, measures smart antenna in the frequency of the described radiofrequency signal of supported full frequency band and/or measures the power of described radiofrequency signal.
15. interference detecting apparatus as claimed in claim 9, is characterized in that, at calibrated channel, in calibration intervals during the phase, described interference detecting apparatus is for detection of the described radiofrequency signal as external disturbance.
16. interference detecting apparatus as claimed in claim 9, is characterized in that, described interference detecting apparatus is applied to one of following system:
Adopt the TDD system with calibrated channel of TD-SCDMA, TD-LTE or TD-LTE-A standard.
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