CN106788813A - A kind of interferer signal detection, cancellation element, method and mobile terminal - Google Patents
A kind of interferer signal detection, cancellation element, method and mobile terminal Download PDFInfo
- Publication number
- CN106788813A CN106788813A CN201611139884.4A CN201611139884A CN106788813A CN 106788813 A CN106788813 A CN 106788813A CN 201611139884 A CN201611139884 A CN 201611139884A CN 106788813 A CN106788813 A CN 106788813A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- input
- power
- conversion mixer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
Abstract
The present invention provides a kind of interferer signal detection, cancellation element, method and mobile terminal, is related to communication technical field, for solving the problems, such as accurately detect interference signal in the prior art.Wherein, the output signal end of base band, input signal end, control signal output connect the first input signal end, the output signal end of down-conversion mixer, the control signal input of adjustable attenuator of up-conversion mixer respectively；Second input signal end of up-conversion mixer is input into the first local oscillation signal, and the output signal end of up-conversion mixer connects the input signal end of adjustable attenuator；The output signal end of adjustable attenuator connects the first input signal end of combiner；Second input signal end input radio frequency of combiner receives signal, and the output signal end of combiner connects the first input signal end of down-conversion mixer；Second input signal end of down-conversion mixer is input into the second local oscillation signal.Detection and elimination of the present invention for interference signal.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of interferer signal detection, cancellation element, method and movement
Terminal.
Background technology
The technology development of mobile terminal especially mobile phone is very fast, not only Generation Mobile Telecommunication System technology (English full name：
The 2nd Generation, referred to as：2G), G mobile communication (English full name：The 3rd-Generation, letter
Claim：4G), forth generation mobile communication technology (English full name：The 4th Generation, referred to as：4G) multimode multi-frequency section simultaneously
In the presence of, and the read or write speed of processor, memory also reached more than gigahertz (GHZ) (GHZ), additionally, WLAN (English name
Claim：Wlan), bluetooth (English name：Bluetooth), the hotspot such as remote control and signal are also more and more.Therefore, it is right
For radio-frequency input signals, wireless environment is more severe, not only by the self-interference inside wireless communication system outside, and
The also moment is disturbed by external environment condition signal.
At present, mobile terminal can be the self-interference that measures wireless communication system in the development phase, and by various electricity
Magnetic disturbance (English full name：Electromagnetic Interference, referred to as：EMI) treatment measures are by wireless communication system
Influence of the self-interference to radio-frequency input signals be minimized.However, can also produce some unknown during running of mobile terminal
Self-interference signal, and also can receive from the interference signal in external environment, these interference signals are all uncertain
And be mostly narrow-band interference signal, therefore there is no effective removing method for such interference signal.For example：When in reception frequency range
When receiving a stronger single tone jamming signal, radio-frequency input signals quality can drastically decline, and show as call noise, break
Continuous, data service rate declines, even occur going offline, suspension phenomenon.For uncertain interference signal, develop in the prior art
Adaptive interference cancellation method is gone out.This Adaptive interference cancellation method is specially：First detection interference signal power and
Frequency, then dynamically adjusts amplifier, sampling resolution bandwidth, bandstop filter in interference blanking unit etc. and detects parameter,
Reach the purpose for eliminating interference signal.But, the scope of the uncertain possible power of interference signal and frequency is all very wide in range,
Therefore the detection parameter for being set in interferer signal detection possibly cannot accurately detect the power and/or frequency of interference signal
Parameter setting in rate, and then influence interference blanking unit, interference signal cannot be eliminated.Therefore how more accurately detection is dry
It is a technical problem urgently to be resolved hurrily to disturb signal.
The content of the invention
Embodiments of the invention provide a kind of interferer signal detection, cancellation element, method and mobile terminal, for solving
Interference signal cannot be accurately detected in the prior art, and then causes interference with the problem that signal cannot be eliminated.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
A kind of first aspect, there is provided interferer signal detection device, including：Including：Base band, up-conversion mixer, adjustable decline
Subtract device, combiner and down-conversion mixer；
The output signal end of the base band connects the first input signal end of the up-conversion mixer, the base band it is defeated
Enter the output signal end that signal end connects the down-conversion mixer, the base band control signal output connection is described adjustable to decline
Subtract the control signal input of device；
Second input signal end of the up-conversion mixer is input into the first local oscillation signal, the up-conversion mixer it is defeated
Go out the input signal end that signal end connects the adjustable attenuator, the up-conversion mixer is used for the first input signal end
Input signal and the first local oscillation signal are exported after carrying out up-conversion Frequency mixing processing in the output signal end；
The output signal end of the adjustable attenuator connects the first input signal end of the combiner；
Second input signal end input radio frequency of the combiner receives signal, the output signal end connection of the combiner
First input signal end of the down-conversion mixer；
Second input signal end of the down-conversion mixer is input into the second local oscillation signal, and the down-conversion mixer is used for
The input signal and the second local oscillation signal at the first input signal end is carried out after down coversion Frequency mixing processing in the output signal end
Output.
A kind of second aspect, there is provided interference signal eliminating apparatus, including：
Interferer signal detection device, the interferer signal detection device includes the interferer signal detection dress described in first aspect
Put, frequency and power for obtaining interference signal；
Bandstop filter, eliminates for the frequency according to the interference signal and power setting frequency filtering and filtering depth
The interference signal.
A kind of third aspect, there is provided interferer signal detection method, including：
Base band generates baseband output signal；The baseband output signal is unmodulated signal；
Up-conversion mixer carries out up-conversion Frequency mixing processing generation the to the baseband output signal and the first local oscillation signal
One process signal；The frequency of first local oscillation signal is more than or equal to the minimum frequency and small in the frequency range of radio frequency receiving signal
In or equal to peak frequency in the frequency range of radio frequency receiving signal；
Adjustable attenuator is according to the standard and bandwidth output control signal of radio frequency receiving signal and in the control signal
Power under control to first process signal is adjusted generating reference signal；The power of the reference signal is penetrated with described
Frequency receives the difference of the power of signal within a preset range；
Combiner is combined treatment the first process signal of generation to the reference signal and the radio frequency receiving signal；
Down-conversion mixer carries out down coversion Frequency mixing processing life to second local oscillation signal and the second processing signal
Into the base-band input signal；
Base band carries out fast Fourier transform and the power and frequency according to the reference signal to the base-band input signal
Rate determines the frequency and power of detection parameter acquiring interference signal.
A kind of fourth aspect, there is provided interfering signal removing method, including：
The frequency and power of interference signal are obtained by the interferer signal detection method described in the third aspect；
Frequency and power setting frequency filtering and filtering depth according to the interference signal eliminate the interference signal.
A kind of 5th aspect, there is provided mobile terminal, including：Interferer signal detection device described in first aspect；Or the
Interference signal eliminating apparatus described in two aspects.
Interferer signal detection device provided in an embodiment of the present invention, including：Base band, up-conversion mixer, adjustable attenuator,
Combiner and down-conversion mixer；Wherein, interferer signal detection process can by base band export baseband output signal and
Control signal；Up-conversion mixer is used to carry out at up-conversion mixing the first local oscillation signal and baseband output signal radiofrequency signal
Reason the first process signal of generation；The power that adjustable attenuator is used under control of the control signal to the first process signal is adjusted
Section generation reference signal, combiner is used to be combined reference signal and radio frequency receiving signal in treatment generation second processing letter
Number, down-conversion mixer is used to carry out the second local oscillation signal and second processing signal the generation base band input of down coversion Frequency mixing processing
Signal, last base band be used for export baseband output signal, control signal and, fast Fourier transform is carried out to base-band input signal
(referred to as：FFT), and power according to reference signal and frequency determine the frequency and work(of detection parameter acquiring interference signal
Rate, due to the frequency sum that the frequency of the reference signal in the embodiment of the present invention is the first local oscillation signal and baseband output signal,
And can by the set of frequency of the first local oscillation signal be minimum frequency in the frequency range equal to radio frequency receiving signal and less than or
Equal to the peak frequency in the frequency range of radio frequency receiving signal, so the frequency of reference signal exists with the difference on the frequency of radio frequency receiving signal
Within certain limit, and because the power of the reference signal in the embodiment of the present invention exists with the difference of the power of radio frequency receiving signal
In preset range, so the detection parameter that the power and frequency according to reference signal determine can more accurately to interference signal
Detected.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be in embodiment or description of the prior art
The required accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are only some realities of the invention
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
One of schematic diagram of interferer signal detection device that Fig. 1 is provided for embodiments of the invention；
The oscillogram of the interference signal that Fig. 2 is provided for embodiments of the invention；
The two of the schematic diagram of the interferer signal detection device that Fig. 3 is provided for embodiments of the invention；
The three of the schematic diagram of the interferer signal detection device that Fig. 4 is provided for embodiments of the invention；
The four of the schematic diagram of the interferer signal detection device that Fig. 5 is provided for embodiments of the invention；
The schematic structure of the interference signal eliminating apparatus that Fig. 6 is provided for embodiments of the invention；
The step of interferer signal detection method that Fig. 7 is provided for embodiments of the invention flow chart；
The step of another interferer signal detection method that Fig. 8 is provided for embodiments of the invention flow chart；
The step of interfering signal removing method that Fig. 9 is provided for embodiments of the invention flow chart；
The step of another interfering signal removing method that Figure 10 is provided for embodiments of the invention flow chart.
Specific embodiment
Referring now to Description of Drawings multiple embodiment, wherein indicating similar elements herein with identical reference.
In the following description, for ease of explaining, a large amount of details are given, to provide to the comprehensive of one or more embodiments
Understand.It may be evident, however, that embodiment can also be practiced without these specific details.In other examples, in block diagram form
Known features and equipment are shown, in order to describe one or more embodiments.
Inventive principle of the invention is：The scope of power and frequency for interference signal is all very wide in range, interference signal
The detection parameter set during detection possibly cannot accurately detect the power and/or frequency of interference signal, and then cause interference with
The problem that signal cannot be eliminated, in the embodiment of the present invention by the base band in interferer signal detection device, up-conversion mixer, can
The difference of the power of controlled attenuator, combiner and down-conversion mixer generation power and radio frequency receiving signal is in preset range
The difference on the frequency of interior, frequency and radio frequency receiving signal reference signal within limits, and power according to reference signal and
The detection parameter that frequency determines, so as to more accurately be detected to interference signal.
Embodiments of the invention provide a kind of interferer signal detection device, and Fig. 1 is provided in an embodiment of the present invention for examining
Survey the schematic diagram of the device of interference signal.As shown in figure 1, the interferer signal detection device 100 includes：Base band 11, on
Conversion mixer 12, adjustable attenuator 13, combiner 14 and down-conversion mixer 15；
The output signal end 111 of base band 11 connects the first input signal end 121 of up-conversion mixer 12, base band 12 it is defeated
Enter the output signal end 153 that signal end 112 connects down-conversion mixer 15, the control signal output 113 of base band 11 connects adjustable
The control signal input 133 of attenuator 13.
The second input signal end 122 of up-conversion mixer 12 is input into the first local oscillation signal TX_LO, up-conversion mixer 12
Output signal end 123 connect adjustable attenuator 13 input signal end 131, up-conversion mixer 12 be used for first input letter
Number end 121 input signal and the first local oscillation signal TX_LO carry out up-conversion Frequency mixing processing after exported in output signal end 123.
The output signal end 132 of adjustable attenuator 13 connects the first input signal end 141 of combiner 14.
The input radio frequency of second input signal end 142 of combiner 14 receives signal RX, the output signal end 143 of combiner 14
Connect the first input signal end 151 of down-conversion mixer 15.
The second input signal end 152 of down-conversion mixer 15 is input into the second local oscillation signal RX_LO, down-conversion mixer 15
Carried out after down coversion Frequency mixing processing defeated for the input signal to the first input signal end 151 and the second local oscillation signal TX_LO
Go out signal end 153 to export.
Specifically, effect summary of each device of embodiment shown in Fig. 1 in interferer signal detection device is as follows：
Base band 11, for exporting baseband output signal TX_IQ and defeated according to the standard and bandwidth of radio frequency receiving signal RX
Go out control signal C1.
Wherein, baseband output signal TX_IQ is unmodulated signal.
Also, it should be noted that because baseband output signal TX_IQ in embodiments of the present invention needs frequency to fix and nothing
Frequency deviation and phase shift, therefore baseband output signal is necessary for unmodulated signal.Exemplary, baseband output signal TX_IQ can be
Non-modulation sine wave signal.Additionally, when interferer signal detection is carried out, it is impossible to which the value of baseband output signal TX_IQ is set
It is too big, be responsible for influenceing base band 11 to carry out fast Fourier transform (English name to radio frequency receiving signal RX：Fast Fourier
Transformation, referred to as：FFT).Specific frequency in the embodiment of the present invention to baseband output signal TX_IQ is not done
Limit, carrying out FFT to radio frequency receiving signal RX not interfering with base band 11 is defined.
Optionally, the frequency of baseband output signal TX_IQ can be radio frequency receiving signal frequency range in peak frequency with
The difference of the minimum frequency in the frequency range of radio frequency receiving signal.That is, it is f by the frequency representation of baseband output signal TX_IQbb, will
The frequency range of radio frequency receiving signal is expressed as [f1,f2], then there is fbb=f2-f1。
For example：The frequency range of radio frequency receiving signal is [930MHz, 935MHz], and 930MHz- is detected during interferer signal detection
Interference signal between 935MHz, the peak frequency in the frequency range of radio frequency receiving signal is 935MHz, the frequency of radio frequency receiving signal
Minimum frequency in section is 930MHz, then the frequency for having baseband output signal TX_IQ is：fbb=f2-f2=935MHz-930MHz
=5MHz.
Up-conversion mixer 12, the baseband output signal TX_ for receiving the first local oscillation signal TX_LO and the output of base band 11
IQ, up-conversion Frequency mixing processing is carried out to the first local oscillation signal TX_LO and baseband output signal TX_IQ and generates the first process signal
M1。
Wherein, the frequency of the first local oscillation signal TX_LO is more than or equal to the minimum frequency in the frequency range of radio frequency receiving signal
And less than or equal to the peak frequency in the frequency range of radio frequency receiving signal.That is, it is by the frequency representation of the first local oscillation signal TX_LO
fLO, the frequency range of radio frequency receiving signal is expressed as [f1,f2], then there is fLO∈[f1,f2]。
For example：Detection 930MHz-935MHz between interference signal, then the frequency range of radio frequency receiving signal for [930MHz,
935MHz], and peak frequency in the frequency range of radio frequency receiving signal is 935MHz, the minimum in the frequency range of radio frequency receiving signal
Frequency is 930MHz, then the frequency f of the first local oscillation signal TX_LOLO∈[f1,f2], i.e. fLO∈[903MHz,935MHz]。
Further, since the first process signal M1 is that the first local oscillation signal TX_LO and baseband output signal TX_IQ are carried out
After frequency conversion Frequency mixing processing generate signal, so the frequency of the first process signal M1 be the first local oscillation signal TX_LO frequency with
The frequency sum of baseband output signal TX_IQ.
That is, it is f by the first process signal M1 frequency representationsm1, baseband output signal TX_IQ frequency representation be fbb, first
The frequency representation of local oscillation signal TX_LO is fLO, then have fm1=fbb+fLO。
Adjustable attenuator 13, for receive base band output control signal C1 and up-conversion mixer 12 output first
Process signal M1, the power to the first process signal M1 under the control of control signal C1 is adjusted generation reference signal CW.
Wherein, the difference of the power of the power of reference signal CW and radio frequency receiving signal RX is within a preset range.
Power from the first process signal M1 of the output of up-conversion mixer 12 is certain, it is necessary to be believed according to radio frequency reception
The standard of number RX, bandwidth are adjusted to the power of the first process signal M1.
Specifically, the standard, bandwidth according to radio frequency receiving signal RX the power of the first process signal M1 is adjusted can
To comprise the following steps：
First, the standard of radio frequency receiving signal, bandwidth are substituted into be calculated as below in formula and calculates radio frequency receiving signal RX's
Power：
Pin(min)(dBm)=n+10logBW+NF (dB)+ATTRF+SNRo,min(dB)
Wherein, Pin(min)(dBm) it is the power of radio frequency receiving signal RX；N is system substrate noise, unit Hz；BW is to connect
The bandwidth of the collection of letters number, unit Hz；NF is the noise coefficient of receiver；SNRo,minIt is the minimum signal to noise ratio of input, ATTRFBefore radio frequency
Damaged on end consumes.Additionally, system substrate noise n is lost ATT with radio-frequency front-endRFConstant is, exemplary, system substrate noise n takes
Value can be：- 174 (dBm/HZ), radio-frequency front-end loss ATTRFValue can be：2(dB).
Secondly, the power according to radio frequency receiving signal RX is adjusted making the ginseng of generation to the power of the first process signal M1
Examine the difference of the power of signal CW and the power of radio frequency receiving signal RX within a preset range.
Additionally, because the difference of the power of power and the radio frequency receiving signal RX of reference signal CW within a preset range, institute
It is suitable with the sensitivity of radio frequency receiving signal RX with reference signal CW.Further, preferably reference signal CW is made in above-described embodiment
Power it is equal with the power of radio frequency receiving signal RX, reference signal CW is identical with the sensitivity of radio frequency receiving signal RX.However,
Occur certain error during reality is adjusted to the power of the first process signal M1, the power of reference signal CW with penetrate
The power that frequency receives signal RX may not be essentially equal, as long as therefore the process in generation reference signal CW makes reference signal CW
Power and radio frequency receiving signal RX power difference within a preset range.
Exemplary, when the standard for receiving radiofrequency signal is Google's Information Mobile Service (English full name：Google Mobile
Service, referred to as：GSM) standard, during with a width of GSM900 frequency ranges, the system noise factor NF=3 of general GSM receivers
(dB) it is SNR, to be input into minimum signal to noise ratioo,min=6 (dB), a width of BW=200 of the band (KHz) of gsm system, therefore be in standard
GSM, with a width of GSM900 frequency ranges when, the minimum power input of radio frequency receiving signal RX is：
Pin(min)(dBm)=- 174 (dBm/Hz)+10log (200 × 103) (dB)=- 110 (dBm) of+3 (dB)+2 (dB)+6
Therefore need by control signal C1 control adjustable attenuator 13 make the reference signal of arrival combiner 14 power be-
110dBm.Equally, when the standard for receiving radiofrequency signal is Long Term Evolution (English full name：Long Term Evolution, referred to as：
LTE) standard, during with a width of 10M, Pin(min)(dBm)=- 100dBm, it is therefore desirable to which adjustable damping is controlled by control signal C1
Device 13 makes the power of the reference signal of arrival combiner 14 be -100dBm.
Combiner 14, reference signal CW and radio frequency receiving signal RX for receiving the output of adjustable attenuator 13, to ginseng
Examine signal CW and radio frequency receiving signal RX and be combined treatment generation second processing signal M2.
Down-conversion mixer 15, for receiving the second local oscillation signal RX_LO and second processing signal M2, believes the second local oscillator
Number RX_LO and second processing signal M2 carries out down coversion Frequency mixing processing generation base-band input signal RX_IQ.
Base band 11 is additionally operable to receive base-band input signal RX_IQ, and FFT is carried out to base-band input signal RX_IQ, according to
The power and frequency of reference signal CW determine the frequency and power of detection parameter acquiring interference signal.
Optionally, detection parameter includes：The multiple of amplification and the resolution bandwidth of sampling.
Specifically, after Baseband Receiver base-band input signal RX_IQ, carrying out quick Fu to base-band input signal RX_IQ first
So as to base-band input signal RX_IQ is transformed from the time domain into frequency domain, be beneficial to logarithmic signal carries out frequency domain treatment to family name's conversion.
During FFT, detection parameter is set using known reference signal CW as reference signal when setting detection parameter, therefore
The detection parameter of setting is accurate.Additionally, the setting up procedure of above-mentioned detection parameter is it can be appreciated that be that interference signal is examined
The trimming process of the parameter of device is surveyed, after being corrected to the parameter of interferer signal detection device, can accurately to interference letter
Number detected, therefore embodiments of the invention can accurately detect the frequency and intensity of interference signal.
Exemplary, following interferer signal detection device includes：Amplifying unit and sampling unit, the frequency of reference signal CW
Rate is 937.5MHz, and the power of reference signal CW is to the power in above-described embodiment according to reference signal CW as a example by -110dBm
Determine that the frequency of detection parameter acquiring interference signal and the process of power are illustrated with frequency.First according to reference signal CW's
The resolution bandwidth that frequency 937.5MHz is sampled to sampling unit sets, and makes sampling frequency range frequency centered on 937.5
Rate, and the resolution bandwidth of sampling is adapted to current detection frequency, so as to avoid setting because of sampling frequency range or sampling resolution
The improper caused problem do not sampled to interference signal is put, secondly power-the 110dBm according to reference signal CW is to putting
The multiplication factor of big unit is set so that amplify after interfering signal power interferer signal detection device detection model
In enclosing.
Also, it should be noted that being included with interferer signal detection device in above-described embodiment：Amplifying unit and sampling are single
Illustrated as a example by unit, but the embodiment of the present invention is not limited to this, those skilled in the art on the basis of above-described embodiment
Interferer signal detection device can also be made includes other functions unit.For example：Interferer signal detection dress in the embodiment of the present invention
Putting to include：The filter unit being filtered to signal.Additionally, when interferer signal detection device also includes filter unit
When, the frequency filtering of wave filter can also be set according to the frequency of reference signal CW.
Exemplary, shown in reference picture 2, Fig. 2 is to detect the interference signal between GSM900 frequency ranges 930MHz-935MHz
Example is illustrated to above-described embodiment.
As shown in the above description：The frequency that baseband output signal TX_IQ can be set is 5MHz, the first local oscillation signal TX_
The frequency of LO is 932.5MHz, and the power of reference signal can be -100dBm, and now, the frequency of reference signal CW is
937.5MHz。
Shown in reference picture 2, the frequency of reference signal compared to useful signal in radio frequency receiving signal centre frequency to the right
50KHz is offset by, and the centre frequency of useful signal is offset to the right at 75KHz with one in compared to radio frequency receiving signal
Individual power is the interference signal of -115dBm, then the frequency of interference signal can be obtained by Fig. 2 for 937.5MHz+25KHz, interference
The power of signal is -115dBm.
Interferer signal detection device provided in an embodiment of the present invention, including：Base band, up-conversion mixer, adjustable attenuator,
Combiner and down-conversion mixer；Wherein, interferer signal detection process can by base band export baseband output signal and
Control signal；Up-conversion mixer is used to carry out at up-conversion mixing the first local oscillation signal and baseband output signal radiofrequency signal
Reason the first process signal of generation；The power that adjustable attenuator is used under control of the control signal to the first process signal is adjusted
Section generation reference signal, combiner is used to be combined reference signal and radio frequency receiving signal in treatment generation second processing letter
Number, down-conversion mixer is used to carry out the second local oscillation signal and second processing signal the generation base band input of down coversion Frequency mixing processing
Signal, last base band be used for export baseband output signal, control signal and, fast Fourier transform is carried out to base-band input signal
(referred to as：FFT), and power according to reference signal and frequency determine the frequency and work(of detection parameter acquiring interference signal
Rate, due to the frequency sum that the frequency of the reference signal in the embodiment of the present invention is the first local oscillation signal and baseband output signal,
And can by the set of frequency of the first local oscillation signal be minimum frequency in the frequency range equal to radio frequency receiving signal and less than or
Equal to the peak frequency in the frequency range of radio frequency receiving signal, so the frequency of reference signal exists with the difference on the frequency of radio frequency receiving signal
Within certain limit, and because the power of the reference signal in the embodiment of the present invention exists with the difference of the power of radio frequency receiving signal
In preset range, so the detection parameter that the power and frequency according to reference signal determine can more accurately to interference signal
Detected.
The interferer signal detection device that further above-described embodiment is provided also includes：
First controlling switch S1, the second controlling switch S2, the 3rd controlling switch S3, the 4th controlling switch S4, signal transmitting
End Output and signal receiving end Input.
Specifically, shown in reference picture 3, the first end of the first controlling switch S1 connects the output signal of up-conversion mixer 12
End 123, second end of the first controlling switch S2 connects signal transmitting terminal Output；
The first end of the second controlling switch S2 connects the output signal end 123 of up-conversion mixer 12, the second controlling switch
Second end of S2 connects the input signal end 122 of adjustable attenuators 13；
The second end connection of first end connection the signal receiving end Input, the 3rd controlling switch S3 of the 3rd controlling switch S3
Second input signal end 142 of combiner 14；
The second end connection of first end connection the signal receiving end Input, the 4th controlling switch S4 of the 4th controlling switch S4
First input signal end 151 of down-conversion mixer 15.
Wherein, the effect summary of each controlling switch of embodiment shown in Fig. 3 is as follows：
Conducting or cut that first controlling switch S1 is used to control between up-conversion mixer 11 and signal transmitting terminal Output
Only.
Second controlling switch S2 is used to control the on or off between up-conversion mixer 11 and adjustable attenuator 13.
The on or off that 3rd controlling switch S3 is used between control signal receiving terminal Input and combiner 14.
Conducting or cut that 4th controlling switch S4 is used between control signal receiving terminal Input and down-conversion mixer 15
Only.
Control method and work referring to the interferer signal detection device provided above-described embodiment shown in Fig. 3 is former
Reason is illustrated.
When interferer signal detection device in running order (carrying out interferer signal detection), the first controlling switch S1 is controlled
Cut-off, the second controlling switch S2 conductings, the 3rd controlling switch S3 conductings, the 4th controlling switch S4 cut-offs.Because the first control is opened
Close S1 cut-off, therefore up-conversion mixer 12 output signal M1 cannot arriving signal transmitting terminal Output, carrying out interference letter
Signal transmitting terminal Output not transmission signal during number detection.Again because the second controlling switch S2 is turned on, up-conversion mixer
The signal of 12 outputs can be transmitted to adjustable attenuators 13 by the second controlling switch S2.Further, because the 3rd control is opened
Close S3 conductings, the 4th controlling switch S4 cut-offs, so the signal that signal receiving end Input is received is entered by the 3rd controlling switch S3
Enter combiner 14.Therefore, interferer signal detection device can be normally carried out the detection of interference signal.
When interferer signal detection device is in idle state (not carrying out interferer signal detection), the first controlling switch is controlled
S1 is turned on, the second controlling switch S2 cut-offs, the 3rd controlling switch S3 cut-offs, the 4th controlling switch S4 conductings.Due to the first control
Switch S1 conductings, the second controlling switch S2 cut-offs, so the signal of the output of up-conversion mixer 12 passes through the second controlling switch S2
Arriving signal transmitting terminal Output, therefore the signal transmitting terminal Output transmittings radiofrequency signal when interferer signal detection is not carried out.
Again because the 3rd controlling switch S3 cut-offs, the 4th controlling switch S4 conductings, so the signal that signal receiving end Input is received passes through
4th controlling switch S4 sends into base band 11 after carrying out down coversion into down-conversion mixer 15.That is, as the first controlling switch S1
Conducting, the second controlling switch S2 cut-offs, the 3rd controlling switch S3 cut-offs, when the 4th controlling switch S4 is turned on, in above-described embodiment
Interferer signal detection device be also used as the transceiver of communication system.
By the first controlling switch S1, the second controlling switch S2, the 3rd controlling switch S3, the 4th control in above-described embodiment
Switch S4 is controlled to signal transmission in device, such that it is able to make interferer signal detection device common part device and communication system
The transceiver of system, therefore above-described embodiment can lower the cost of interferer signal detection device.
Optionally, the interference blanking unit 100 in above-described embodiment also includes：First amplifier DA1, the second amplifier
LNA and the 3rd amplifier DA2.
Specifically, shown in reference picture 4, the input of the first amplifier DA1 connects the output signal of up-conversion mixer 12
End 123, the first end of the first controlling switch S1 of output end connection of the first amplifier DA1 and the first of the second controlling switch S2
End；
The controlling switch S4's of output signal end 143 and the 4th of the input connection frequency mixer 14 of the second amplifier LNA
Second end, the output end of the second amplifier LNA connects the first input signal end 151 of down-conversion mixer 15；
The input of the 3rd amplifier DA2 connects the output signal end 153 of down-conversion mixer 15, the 3rd amplifier DA2
Input linker with 11 input signal end 112.
Wherein, in the embodiment shown in Fig. 4 the first amplifier DA1, the second amplifier LNA and the 3rd amplifier DA2
Effect summary be as follows：
First amplifier DA1 is used to amplify the first process signal M1.
Second amplifier LAN is used to amplify second processing signal M2.
3rd amplifier DA2 is used to amplify base-band input signal RX_IQ.
Exemplary, the first amplifier and the 3rd amplifier in the embodiment of the present invention can be power amplifier, second
Amplifier can be low-noise amplifier.
Optionally, the interference blanking unit 100 in above-described embodiment also includes：First low pass filter LPF1 and second low
Bandpass filter LPF2.
Specifically, shown in reference picture 5, the input linker of the first low pass filter LPF1 is with 11 output signal end
The output end of 111, the first low pass filter LPF1 connects the first input signal end 121 of up-conversion mixer 12.Second low pass
The input of wave filter LPF2 connects the output signal end 153 of down-conversion mixer 15, the output of the second low pass filter LPF2
The input signal end of the 3rd amplifier DA2 of end connection.
Wherein, the effect of the first low pass filter LPF1 and the second low pass filter LPF2 in the embodiment shown in Fig. 5
Summarize as follows：
First low pass filter LPF1 is used to be filtered treatment to baseband output signal TX_IQ；
Second low pass filter LPF2 is used to be filtered treatment to base-band input signal RX_IQ.
In signal being filtered by the first low pass filter LPF1 and the second low pass filter LPF2 in above-described embodiment
High-frequency interferencing signal.
The present invention provides a kind of interference signal eliminating apparatus in an embodiment, and shown in reference picture 6, the interference signal eliminates dress
Putting 600 includes：Interferer signal detection device 61 and bandstop filter 62.
Wherein, the interferer signal detection device that interferer signal detection device 61 can be provided for any of the above-described embodiment, uses
In the frequency and power that obtain interference signal.Its structure and realize in the uniform above-described embodiment of function interferer signal detection dress
Put identical, no longer described in detail to avoid repeating.
Bandstop filter 62, eliminates dry for the frequency according to interference signal and power setting frequency filtering and filtering depth
Disturb signal.
The interferer signal detection device 61 provided by above-described embodiment obtains the frequency and power of interference signal, Ran Hougen
Interference signal is eliminated according to the frequency and power setting frequency filtering and filtering depth of interference signal, because the filter of bandstop filter 62
Wave frequency rate, and filtering depth are set according to known interfering signal, so the embodiment of the present invention can disappear interference signal signal
Remove.
Yet another embodiment of the invention provides a kind of interferer signal detection method, and the executive agent of the method can be comprising upper
State the interferer signal detection device that the mobile terminal or above-described embodiment of the interferer signal detection device of embodiment offer are provided.
Shown in reference picture 7, the interferer signal detection method comprises the following steps：
S71, generation baseband output signal.
Wherein, baseband output signal is unmodulated signal.
S72, baseband output signal and the first local oscillation signal are carried out up-conversion Frequency mixing processing generate the first process signal.
Wherein, the frequency of the first local oscillation signal is more than or equal to the minimum frequency in the frequency range of radio frequency receiving signal and is less than
Or equal to the peak frequency in the frequency range of radio frequency receiving signal.
S73, the standard according to radio frequency receiving signal and bandwidth output control signal and under control of the control signal to
The power of one process signal is adjusted generating reference signal.
Wherein, the difference of the power of the power of reference signal and radio frequency receiving signal is within a preset range.
S74, to reference signal and radio frequency receiving signal be combined treatment generation the first process signal.
S75, the second local oscillation signal and second processing signal are carried out down coversion Frequency mixing processing generation base-band input signal.
S76, FFT and the power according to reference signal and frequency are carried out to base-band input signal determine detection parameter
Obtain the frequency and power of interference signal.
Due to the frequency that the frequency of the reference signal in the embodiment of the present invention is the first local oscillation signal and baseband output signal
Sum, and the first local oscillation signal frequency more than or equal to radio frequency receiving signal frequency range in minimum frequency and less than or wait
Peak frequency in the frequency range of radio frequency receiving signal, so the difference on the frequency of the frequency of reference signal and radio frequency receiving signal is one
Within the scope of fixed, and because the power of reference signal in the embodiment of the present invention and the difference of the power of radio frequency receiving signal are pre-
If in scope, so the detection parameter that the power and frequency according to reference signal determine more accurately can be entered to interference signal
Row detection.
Optionally, in the standard according to radio frequency receiving signal and bandwidth output control signal and under control of the control signal
Before generation reference signal is adjusted to the power of the first process signal, the interferer signal detection method that above-described embodiment is provided
Also include：Amplify the first process signal；Down coversion Frequency mixing processing generation is being carried out to the second local oscillation signal and second processing signal
Before base-band input signal, method also includes：Amplify second processing signal；Enter to the second local oscillation signal and second processing signal
After row down coversion Frequency mixing processing generation base-band input signal, method also includes：Amplify base-band input signal.
Optionally, up-conversion Frequency mixing processing generation the first treatment letter is being carried out to baseband output signal and the first local oscillation signal
Number before, the interferer signal detection method that above-described embodiment is provided also includes：Treatment is filtered to baseband output signal；Right
Base-band input signal carries out FFT, and the power and frequency according to reference signal determine the frequency of detection parameter acquiring interference signal
Before rate and power, the interferer signal detection method that above-described embodiment is provided also includes：Place is filtered to base-band input signal
Reason.
Optionally, the detection parameter in above-described embodiment includes the resolution bandwidth of the multiple and sampling amplified.
Optionally, the frequency of baseband output signal is the peak frequency in the frequency range of radio frequency receiving signal and radio frequency reception letter
Number frequency range in minimum frequency difference.
Optionally, shown in reference picture 8, in the standard according to radio frequency receiving signal and bandwidth output control signal and in control
Power under the control of signal to the first process signal is adjusted after generation reference signal, and method also includes：
Whether within a preset range the difference of the power of S81, the power for judging reference signal and radio frequency receiving signal.
In step S81, when power and the radio frequency receiving signal of reference signal power difference within a preset range when,
Continue executing with step S74 and treatment the first process signal of generation is combined to reference signal and radio frequency receiving signal, when with reference to letter
Number power and radio frequency receiving signal power difference not within a preset range when, then again to first in return to step S73
The power of process signal is adjusted.
Yet another embodiment of the invention provides a kind of interfering signal removing method, and shown in reference picture 9, the method includes following step
Suddenly：
S91, the frequency and power that obtain interference signal.
Specifically, frequency and power that interference signal is obtained in step S91 are provided specifically by any of the above-described embodiment
Interference signal monitoring method obtain interference signal frequency and power.
S92, the frequency according to interference signal and power setting frequency filtering and filtering depth eliminate interference signal.
Because frequency filtering and filtering depth are set according to known interfering signal, the embodiment of the present invention can be by
Interference signal signal is eliminated.
Optionally, shown in reference picture 10, before the frequency and power that above-mentioned steps S91 obtains interference signal, method is also
Including：
S101, determine whether interference signal.
In step S101, when there is interference signal, step S91 is performed.Directly terminate when state no interference signal.
Yet another embodiment of the invention provides a kind of mobile terminal, and it is dry that the mobile terminal includes that any of the above-described embodiment is provided
Disturb signal supervisory instrument or interference signal eliminating apparatus.
Specifically, mobile terminal is specifically as follows mobile phone, palm PC, personal computer DPF, navigator etc..Nothing
It is which kind of form may each comprise interferer signal detection device in above-described embodiment or interference signal eliminates dress by mobile terminal
Put.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (16)
1. a kind of interferer signal detection device, it is characterised in that including：Base band, up-conversion mixer, adjustable attenuator, combining
Device and down-conversion mixer；
The output signal end of the base band connects the first input signal end of the up-conversion mixer, the input letter of the base band
The output signal end of number end connection down-conversion mixer, the base band control signal output connects the adjustable attenuator
Control signal input；
Second input signal end of the up-conversion mixer is input into the first local oscillation signal, the output letter of the up-conversion mixer
The input signal end of number end connection adjustable attenuator, the up-conversion mixer is used for the input to the first input signal end
Signal and the first local oscillation signal are exported after carrying out up-conversion Frequency mixing processing in output signal end；
The output signal end of the adjustable attenuator connects the first input signal end of the combiner；
Second input signal end input radio frequency of the combiner receives signal, and the output signal end connection of the combiner is described
First input signal end of down-conversion mixer；
Second input signal end of the down-conversion mixer is input into the second local oscillation signal, and the down-conversion mixer is used for the
The input signal and the second local oscillation signal at one input signal end are exported after carrying out down coversion Frequency mixing processing in output signal end.
2. device according to claim 1, it is characterised in that described device also includes：
First controlling switch, the second controlling switch, the 3rd controlling switch, the 4th controlling switch, signal transmitting terminal and signal connect
Receiving end；
The first end of first controlling switch connects the output signal end of the up-conversion mixer, first controlling switch
The second end connect the signal transmitting terminal；
The first end of second controlling switch connects the output signal end of the up-conversion mixer, second controlling switch
The second end connect the input signal end of the adjustable attenuators；
The first end of the 3rd controlling switch connects the signal receiving end, the second end connection institute of the 3rd controlling switch
State the second input signal end of combiner；
The first end of the 4th controlling switch connects the signal receiving end, the second end connection institute of the 4th controlling switch
State the first input signal end of down-conversion mixer.
3. device according to claim 2, it is characterised in that described device also includes：First amplifier, the second amplifier
And the 3rd amplifier；
The input of first amplifier connects the output signal end of the up-conversion mixer；First amplifier it is defeated
Go out the first end of end connection first controlling switch and the first end of second controlling switch；
The input of second amplifier connects the output signal end of the combiner and the second end of the 4th controlling switch；
The output end of second amplifier connects the first input signal end of the down-conversion mixer；
The input of the 3rd amplifier connects the output signal end of the down-conversion mixer；3rd amplifier it is defeated
Go out the input signal end of the end connection base band.
4. device according to claim 3, it is characterised in that described device also includes：First low pass filter and second
Low pass filter；
The input of first low pass filter connects the output signal end of the base band, first low pass filter it is defeated
Go out the first input signal end of the end connection up-conversion mixer；
The input of second low pass filter connects the output signal end of the down-conversion mixer, second low pass filtered
The output end of ripple device connects the input signal end of the 3rd amplifier.
5. device according to claim 1, it is characterised in that the detection parameter includes the multiple for amplifying and sampling
Resolution bandwidth.
6. device according to claim 1, it is characterised in that the frequency of the baseband output signal is the detection frequency range
In peak frequency and it is described detection frequency range in minimum frequency difference.
7. a kind of interference signal eliminating apparatus, it is characterised in that including：
Interferer signal detection device, the interferer signal detection device includes the interference signal described in claim any one of 1-6
Detection means, frequency and power for obtaining interference signal；
Bandstop filter, for described in the frequency according to the interference signal and power setting frequency filtering and filtering depth elimination
Interference signal.
8. a kind of interferer signal detection method, it is characterised in that including：
Base band generates baseband output signal；The baseband output signal is unmodulated signal；
Up-conversion mixer is carried out at up-conversion Frequency mixing processing generation first to the baseband output signal and the first local oscillation signal
Reason signal；The frequency of first local oscillation signal more than or equal to radio frequency receiving signal frequency range in minimum frequency and less than or
Equal to the peak frequency in the frequency range of radio frequency receiving signal；
Adjustable attenuator is according to the standard and bandwidth output control signal of radio frequency receiving signal and in the control of the control signal
Under the power of first process signal is adjusted to generate reference signal；The power of the reference signal connects with the radio frequency
The difference of the power of the collection of letters number is within a preset range；
Combiner is combined treatment the first process signal of generation to the reference signal and the radio frequency receiving signal；
Down-conversion mixer carries out down coversion Frequency mixing processing generation institute to second local oscillation signal and the second processing signal
State base-band input signal；
Base band carries out fast Fourier transform FFT and the power and frequency according to the reference signal to the base-band input signal
It is determined that the frequency and power of detection parameter acquiring interference signal.
9. method according to claim 8, it is characterised in that
In the standard according to radio frequency receiving signal and bandwidth output control signal and right under the control of said control signal
Before the power of first process signal is adjusted generation reference signal, methods described also includes：First amplifier amplifies
First process signal；
The base band is generated in the down coversion Frequency mixing processing that carried out to second local oscillation signal and the second processing signal
Before input signal, methods described also includes：Second amplifier amplifies the second processing signal；
The base band is generated in the down coversion Frequency mixing processing that carried out to second local oscillation signal and the second processing signal
After input signal, methods described also includes：3rd amplifier amplifies the base-band input signal.
10. method according to claim 8, it is characterised in that
The first process signal is generated in the up-conversion Frequency mixing processing that carried out to the baseband output signal and the first local oscillation signal
Before, methods described also includes：First low pass filter is filtered treatment to the baseband output signal；
Fast Fourier transform is carried out to the base-band input signal described, the power and frequency according to the reference signal determine
Before detecting the frequency and power of parameter acquiring interference signal, methods described also includes：Second low pass filter is to the base band
Input signal is filtered treatment.
11. methods according to claim 8, it is characterised in that the detection parameter includes multiple and the sampling amplified
Resolution bandwidth.
12. methods according to claim 8, it is characterised in that the frequency of the baseband output signal connects for the radio frequency
The difference of the minimum frequency in peak frequency and the frequency range of the radio frequency receiving signal in the frequency range collected mail number.
13. methods according to claim 8, it is characterised in that in the standard and bandwidth according to radio frequency receiving signal
Output control signal is simultaneously adjusted generation reference to the power of first process signal under the control of said control signal
After signal, methods described also includes：
Whether within a preset range to detect the difference of the power of the reference signal and the power of the radio frequency receiving signal；Work as inspection
When surveying the difference of the power of the reference signal and the power of the radio frequency receiving signal within a preset range, to described with reference to letter
Number and the radio frequency receiving signal be combined treatment.
A kind of 14. interfering signal removing methods, it is characterised in that including：
The frequency and power of interference signal are obtained by the interferer signal detection method described in claim any one of 8-13；
Frequency and power setting frequency filtering and filtering depth according to the interference signal eliminate the interference signal.
15. interfering signal removing methods according to claim 14, it is characterised in that obtain interference signal frequency and
Before power, methods described also includes：
Determine whether interference signal；
When there is interference signal, the frequency and power of interference signal are obtained.
A kind of 16. mobile terminals, it is characterised in that including：Interferer signal detection device described in claim any one of 1-6；
Or the interference signal eliminating apparatus described in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611139884.4A CN106788813B (en) | 2016-12-12 | 2016-12-12 | Interference signal detection and elimination device and method and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611139884.4A CN106788813B (en) | 2016-12-12 | 2016-12-12 | Interference signal detection and elimination device and method and mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106788813A true CN106788813A (en) | 2017-05-31 |
| CN106788813B CN106788813B (en) | 2020-06-19 |
Family
ID=58880049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611139884.4A Active CN106788813B (en) | 2016-12-12 | 2016-12-12 | Interference signal detection and elimination device and method and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106788813B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111510226A (en) * | 2020-04-14 | 2020-08-07 | 广州视源电子科技股份有限公司 | Filtering method and device of encoder |
| CN114650014A (en) * | 2020-12-18 | 2022-06-21 | 杭州地芯科技有限公司 | Signal mixing circuit device and receiver |
| CN117978126A (en) * | 2024-03-28 | 2024-05-03 | 中山大学 | Active eight-channel filter and radio frequency receiver |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4736455A (en) * | 1985-12-23 | 1988-04-05 | Nippon Telegraph And Telephone Corporation | Interference cancellation system |
| CN1424863A (en) * | 2001-12-06 | 2003-06-18 | 株式会社Ntt都科摩 | Mobile communication terminal, interference eliminating system, method and base station |
| CN101047439A (en) * | 2006-03-31 | 2007-10-03 | 国立大学法人东京工业大学 | Radio communication apparatus and radio communication method |
| CN103873162A (en) * | 2012-12-18 | 2014-06-18 | 中兴通讯股份有限公司 | Spectral interference detection device and method |
-
2016
- 2016-12-12 CN CN201611139884.4A patent/CN106788813B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4736455A (en) * | 1985-12-23 | 1988-04-05 | Nippon Telegraph And Telephone Corporation | Interference cancellation system |
| CN1424863A (en) * | 2001-12-06 | 2003-06-18 | 株式会社Ntt都科摩 | Mobile communication terminal, interference eliminating system, method and base station |
| CN101047439A (en) * | 2006-03-31 | 2007-10-03 | 国立大学法人东京工业大学 | Radio communication apparatus and radio communication method |
| CN103873162A (en) * | 2012-12-18 | 2014-06-18 | 中兴通讯股份有限公司 | Spectral interference detection device and method |
Non-Patent Citations (1)
| Title |
|---|
| 邹武平: "干扰检测与识别技术研究与实现", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111510226A (en) * | 2020-04-14 | 2020-08-07 | 广州视源电子科技股份有限公司 | Filtering method and device of encoder |
| CN114650014A (en) * | 2020-12-18 | 2022-06-21 | 杭州地芯科技有限公司 | Signal mixing circuit device and receiver |
| CN114650014B (en) * | 2020-12-18 | 2022-11-01 | 杭州地芯科技有限公司 | Signal mixing circuit device and receiver |
| CN117978126A (en) * | 2024-03-28 | 2024-05-03 | 中山大学 | Active eight-channel filter and radio frequency receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106788813B (en) | 2020-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6646449B2 (en) | Intermodulation detector for a radio receiver | |
| CN106443122B (en) | High-precision measurement device and method for wide-band large dynamic signal | |
| DE102006037501A1 (en) | A test apparatus and method for providing receiver overload protection during testing of transceivers | |
| US8121571B2 (en) | Method for second intercept point calibration based on opportunistic reception | |
| CN107613504B (en) | Communication network tester and testing method of multi-communication system signals | |
| EP2926480A1 (en) | Built-in passive intermodulation detector for base station equipment | |
| CN208479604U (en) | A kind of broadband two-channel wireless signal receiver | |
| CN106788813A (en) | A kind of interferer signal detection, cancellation element, method and mobile terminal | |
| US9462400B2 (en) | Periodogram-based wireless signal detection method | |
| CN109451509B (en) | NB-IOT base station signal measuring equipment and its measuring processing method | |
| CN106033971B (en) | A kind of the space interference automatic testing method and equipment of RRU | |
| EP1696682A1 (en) | Method of using the signal-to-noise ratio (SNR) to reduce factory test time | |
| US20060291540A1 (en) | Apparatus for processing digital if signals capable of detecting jamming signals | |
| US10333691B2 (en) | Receiver and signal processing method | |
| CN110034831A (en) | A kind of spectrum monitoring device and method of low complex degree | |
| CN209860895U (en) | Receiver and communication equipment | |
| CN101895894B (en) | Method for selecting working channel of dynamic spectrum shared wireless communication system and device thereof | |
| US9160387B2 (en) | Method and apparatus for noise canceling | |
| CN204008853U (en) | A kind of sweep generator | |
| US7577412B2 (en) | System and method for detecting narrow bandwidth signal content to determine channel occupancy | |
| CN112751968B (en) | 5G terminal testing method based on cloud testing platform | |
| US8693954B2 (en) | Interferer reduction | |
| CN105099478A (en) | Apparatus and method for improving receiving sensitivity of RF link | |
| CN108540151B (en) | A kind of method and device for eliminating mono-tone interference | |
| Yu et al. | The design of a 6GHz band RF receiver with excellent I/Q image suppression |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |