CN108601045A - A kind of method for detecting standing wave, device and the device with store function - Google Patents
A kind of method for detecting standing wave, device and the device with store function Download PDFInfo
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Abstract
This application discloses a kind of method for detecting standing wave, device and with the device of store function, this method includes：It generates periodically positive and negative alternate standing wave and detects signal, transmitting signal is generated after being superimposed baseband signal, transmitting signal is sent by transmission channel, receive the reflection signal that the transmitting signal generates in transmission process, and the reflection signal is subjected to periodic inversion, by the cumulative preset times of the reflection signal after periodic inversion, so that the signal-to-noise ratio that the standing wave in signal detects the reflection signal of signal and the reflection signal of the baseband signal of reflecting after cumulative finally determines system standing-wave ratio more than predetermined threshold value using the reflection signal after adding up.By the above-mentioned means, the application enables to signal-to-noise ratio to be promoted comparatively fast, the efficiency of standing wave detection is improved.
Description
Technical field
This application involves fields of communication technology, more particularly to a kind of method for detecting standing wave, device and have store function
Device.
Background technology
In existing communication system, the connection state of antenna-feeder system is mainly judged by standing wave detection, it is ensured that from base station to
The channel connection eated dishes without rice or wine is normal, and energy can effectively be radiate by good connection from antenna opening.FDR(Frequency
Domain Reflectometer, frequency domain reflection) technology is common online method for detecting standing wave.But existing FDR standing waves
Detection method is only applicable to broadband signal, and for narrow band signal, existing FDR method for detecting standing wave signal-to-noise ratio promotion speed is slow,
Standing wave detection efficiency is low.
Invention content
The application is mainly solving the technical problems that provide a kind of method for detecting standing wave, device and the dress with store function
It sets, it is slow-footed can to solve the problems, such as that existing FDR method for detecting standing wave signal-to-noise ratio is promoted.
In order to solve the above technical problems, the technical solution that the application uses is：A kind of method for detecting standing wave is provided, is wrapped
It includes：It generates standing wave and detects signal, it includes positive and negative alternate periodic signal which, which detects signal,；Transmitting signal is led to by emitting
Road is sent, wherein transmitting signal includes standing wave detection signal and baseband signal；The transmitting signal is received in transmission process
The reflection signal of generation；The reflection signal is subjected to periodic inversion；The reflection signal after periodic inversion is cumulative default
Number, so that reflecting the reflection signal of the reflection signal and baseband signal of standing wave detection signal in signal after cumulative
Signal-to-noise ratio is more than predetermined threshold value；System standing-wave ratio is determined using the reflection signal after cumulative.
In order to solve the above technical problems, another technical solution that the application uses is：A kind of standing wave detecting device is provided,
Including：Signal generator detects signal for generating standing wave, and it includes positive and negative alternate periodic signal which, which detects signal,；Hair
Transmit-receive radio road, connection signal generator are sent for that will emit signal by transmission channel, wherein transmitting signal includes standing wave
Detect signal and baseband signal；Reflection receivable circuit connects radiating circuit, is generated in transmission process for receiving transmitting signal
Reflection signal；Signal processing circuit connects reflection receivable circuit, carries out periodic inversion for that will reflect signal, is additionally operable to
By the cumulative preset times of reflection signal after periodic inversion, so that reflecting standing wave detection signal in signal after cumulative
The signal-to-noise ratio for reflecting signal and the reflection signal of the baseband signal is more than predetermined threshold value, and is determined using the reflection signal after cumulative
System standing-wave ratio.
In order to solve the above technical problems, another technical solution that the application uses is：It provides a kind of with store function
Device, be stored with instruction, which is characterized in that the instruction, which is performed, realizes method as described above.
The advantageous effect of the application is：The case where being different from the prior art in the section Example of the application, passes through generation
Periodically positive and negative alternate standing wave detects signal, and transmitting signal is generated after being superimposed baseband signal, and transmitting signal is logical by emitting
Road is sent, and receives the reflection signal that the transmitting signal generates in transmission process, and the reflection signal is carried out periodically
Reversion adds up the reflection signal after periodic inversion preset times, so that the standing wave is examined in the reflection signal after cumulative
The signal-to-noise ratio for reflecting signal and the reflection signal of the baseband signal for surveying signal is more than predetermined threshold value, finally using anti-after adding up
It penetrates signal and determines system standing-wave ratio.By the above-mentioned means, the application will reflect signal period sex reversal so that the reflection after reversion
After standing wave detection Signal averaging is multiple in signal, power speedup is more than the power speedup of baseband signal, so that letter
It makes an uproar more very fast than being promoted, improves the efficiency of standing wave detection.
Description of the drawings
Fig. 1 is the flow diagram of the application method for detecting standing wave first embodiment；
Fig. 2 is the waveform diagram of standing wave detection signal；
Fig. 3 is the idiographic flow schematic diagram of step S14 in Fig. 1；
Fig. 4 is to reflect standing wave detection signal and the preceding waveform diagram with after reversion of baseband signal reversion in signal；
Fig. 5 is the idiographic flow schematic diagram of step S16 in Fig. 1；
Fig. 6 is the flow diagram of the application method for detecting standing wave second embodiment；
Fig. 7 is the flow diagram of the application method for detecting standing wave 3rd embodiment；
Fig. 8 is the structural schematic diagram of the application standing wave detecting device first embodiment；
Fig. 9 is one concrete structure schematic diagram of the application standing wave detecting device；
Figure 10 is the structural schematic diagram of the application standing wave detecting device second embodiment；
Figure 11 is the structural schematic diagram of the application standing wave detecting device 3rd embodiment；
Figure 12 is the structural schematic diagram for one embodiment of device that the application has store function.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
As shown in Figure 1, the application method for detecting standing wave first embodiment includes：
S11：It generates standing wave and detects signal；
Wherein, standing wave detection signal includes positive and negative alternate periodic signal.The positive and negative alternate periodic signal refers to one
The amplitude of the signal is positive and negative alternate in a period, and the duration of true amplitude and negative amplitude can be identical, can not also
Together, the specific period can also be arranged according to actual conditions, be not specifically limited herein.
Specifically, in an application examples, as shown in Fig. 2, the standing wave detection signal period generated is 2T, wherein a T
Signal in time is true amplitude a1, a2 ... a512, and the signal in another T time is negative amplitude-a1 ,-a2 ...-
a512。
S12：Transmitting signal is sent by transmission channel, wherein transmitting signal includes standing wave detection signal and base band
Signal；
Wherein, which can be narrow band signal, can also be broadband signal, be not specifically limited herein.This Shen
Embodiment please is illustrated by taking narrow band signal as an example.
Specifically, in an application examples, the standing wave can be detected into signal by an adder and is carried out with baseband signal
After superposition, the transmitting signal is obtained, transmission channel is may then pass through and sends the transmitting signal.Wherein, the transmitting is logical
Road includes but not limited to signal processor, such as DPD (Digital Pre-Distortion, digital pre-distortion) circuit, number
Mode converter DAC etc. and ballistic device, such as transmitter TX, duplexer DUP and antenna etc..
Optionally, it when detecting into moving standing wave, before sending the transmitting signal, needs first to suspend the meetings such as DPD, power control
The function of influencing system channel state avoids influencing standing wave Detection accuracy since system channel state changes.
S13：Receive the reflection signal that the transmitting signal generates in transmission process；
Wherein, which includes the reflection signal of the reflection signal and standing wave detection signal of baseband signal.
Specifically, the receiving terminal of the reflection signal is some position before the transmitting signal transmission to antenna, such as is sent out
Some position between emitter TX and duplexer DUP, setting can receive the reflection signal there are one signal receiving point is reflected,
And carried out analog-to-digital conversion.
S14：The reflection signal is subjected to periodic inversion；
Wherein, refer to by the amplitude of the signal from being just changed to negative or be changed to just from negative by signal progress periodic inversion.It should
Reflect returing cycle and the duration of reversion duration and the period and positive and negative amplitude of standing wave detection signal of signal
It is related.The cycle phase that the returing cycle can detect signal with the standing wave is same, which can detect with the standing wave
The duration of the true amplitude of signal or negative amplitude is identical.
Optionally, as shown in figure 3, step S14 includes：
S141：At least partly negative signal periodic inversion that standing wave is detected to the reflection signal of signal is positive signal.
S142：At least partly positive signal periodic inversion by the reflection signal for reflecting baseband signal in signal is negative letter
Number, so that the reflection signal of baseband signal is at least partly cancelled out each other in cumulative back reflection signal.
Specifically, in an application examples, as shown in figure 4, reflection signal includes the reflection signal A1 of standing wave detection signal
And the reflection signal B1 of baseband signal, before reversion, such as Fig. 4 (a), 4 (b) is shown respectively for A1 signals and B1 signal waveforms, instead
The turn-week phase is set as the period 2T of standing wave detection signal, and the reversion duration is set as T, and reversion starting point is set as (2n+1) T
Moment, wherein n are integer, then the A2 signals after A1 signals and the reversion of B1 signals and B2 signal waveforms are respectively such as Fig. 4 (c), 4 (d)
It is shown, it is possible thereby to which the negative amplitude parts of A1 signals are reversed to true amplitude, the part true amplitude of B2 signals is reversed to negative width
Value so that A2 signal amplitudes are largely one in true amplitude and negative amplitude after inverting, and makes B2 signals become just
Alternate signal is born, and the positive and negative amplitude duration is essentially identical.It certainly, can also be by the A1 signals in other application example
True amplitude partial inversion be negative amplitude, amplitude is born in the part of B1 signals is reversed to true amplitude.
S15：Reflection signal after periodic inversion is added up preset times, so that standing wave in the reflection signal after cumulative
The signal-to-noise ratio for detecting the reflection signal of signal and the reflection signal of baseband signal is more than predetermined threshold value；
Wherein, which is the pre-set accumulative frequency of signal-to-noise ratio detected according to standing wave, such as 200 inferior.
The predetermined threshold value is the snr threshold being arranged according to antenna-feeder system standing wave detection demand, such as 50dB or 60dB.
Specifically, in an application examples, reflection signal includes the reflection signal and baseband signal of standing wave detection signal
Signal is reflected, when carrying out the reflection signal after reversion to be segmented cumulative preset times, can regard as and standing wave is detected into the anti-of signal
Penetrating the reflection signal of signal and baseband signal, to carry out segmentation respectively cumulative.For example, the standing wave in Fig. 4 (c), 4 (d) is detected signal
Reflection signal A2 signals and the reflection signal B2 signals of baseband signal be divided into multiple sections, such as with the half period of B2 signals for one
Section, i.e., be divided into 0-T, T-2T ... multiple sections by A2 signals and B2 signals, and then add up N+1 section, i.e., will the cumulative N of reflection signal
It is secondary.Since A2 signals are positive signal in the reflection signal after the reversion, then after the n times that add up, amplitude is increased to N times, power
It is increased to N2Times, and since B2 signals are positive and negative alternating signal, when carrying out being segmented cumulative, when N is odd number, after the n times that add up,
Amplitude is 0, i.e. signal is cancelled out each other, and when N is even number, its amplitude is constant after the n times that add up.Therefore, standing wave in signal is reflected to examine
The ratio of power after the reflection signal A2 of survey signal and the reflection signal B2 of baseband signal are cumulative can be increasing, may finally
Make the ratio, that is, the signal-to-noise ratio of the reflection signal of the standing wave detection signal after adding up and the reflection signal of baseband signal is more than in advance
If threshold value (such as 50dB).
In the present embodiment, since baseband signal is narrow band signal, the data variation rate of narrow band signal is low, when one section longer
Interior correlation is strong, and the reflection signal of the narrow band signal can cancel out each other after reversely being added up repeatedly using the above method.At it
In his embodiment, which can also be broadband signal, uncorrelated between each data in broadband signal, using above-mentioned side
The reflection signal of the broadband signal will not be offset after method reversely adds up repeatedly, but its power increasing degree is slower, be less than standing wave and examined
The increasing degree for surveying the reflection signal of signal can equally make that standing wave is detected in the reflection signal after adding up using the above method
The signal-to-noise ratio of the reflection signal of signal and the reflection signal of baseband signal is comparatively fast more than predetermined threshold value.
S16：System standing-wave ratio is determined using the reflection signal after cumulative.
Wherein, which is the standing-wave ratio of antenna-feeder system.Since standing wave detects in the reflection signal after adding up
The signal-to-noise ratio of the reflection signal of signal and the reflection signal of baseband signal is comparatively fast more than predetermined threshold value, i.e. the baseband signal substantially may be used
To ignore, at this point it is possible to determine the system standing-wave ratio using the reflection signal after cumulative.
Optionally, as shown in figure 5, step S16 includes：
S161：Utilize the channel response of the reflection signal computing system after adding up；
Wherein, the channel response of the system can be time domain response, can also be frequency domain response, not do specific limit herein
It is fixed.The channel response of the system is from the response for sending standing wave detection signal to the channel cumulative reflection signal.
S162：Channel response and initial channel response are compared, determine system standing-wave ratio.
Wherein, initial channel response is channel response when testing obtained system open loop in advance, i.e., at the beginning of antenna-feeder system
When beginning and end connect antenna, obtained initial channel response is tested in advance.Initial channel response equally can be time domain response,
It can be frequency domain response.
Specifically, in an application examples, the reflection signal after this can be utilized cumulative is detected with the standing wave being initially generated
Signal calculates the channel response of the system, such as time domain response, and the peak value for then obtaining the time domain response of the system is initial with this
The peak value of channel time domain response calculates the peak value ratio of the two, and finally the peak value is than being the system standing-wave ratio.Certainly, at other
In application examples, the system standing-wave ratio can also be determined by frequency domain response.
The method for detecting standing wave that the application may be used below emulates.Wherein, input baseband signal is Tetra
5kbps I/Q datas do 512 points of cumulative emulation on 184.32Mbps.
Simulation result：If with 512 segmentations, baseband signal, which is directly segmented, to add up, and after adding up 192 times, gross output is
245 times of source signal.If first with 512 segmentations, baseband signal segmentation reversion is cumulative, after finally adding up 192 times, gross output
It is 0.45 times of original signal.That is, cumulative add up with reversion segmentation of direct segmentation is compared, base band power can reduce by 245/
0.45=544 times, in the case where identical signal-to-noise ratio requires, accumulation interval can reduce 544 times.
In the present embodiment, signal period sex reversal will be reflected so that standing wave detection signal is folded in the reflection signal after reversion
After adding time, power speedup is more than the power speedup of baseband signal, so that signal-to-noise ratio is promoted very fast, improves standing wave
The efficiency of detection.
As shown in fig. 6, the application method for detecting standing wave second embodiment is implemented in the application method for detecting standing wave first
On the basis of example, step S161 and S162 further comprise：
S1611：Reflection signal and standing wave detection signal after adding up carry out Fast Fourier Transform (FFT) respectively, to obtain respectively
The frequency-region signal and standing wave of reflection signal to after adding up detect the frequency-region signal of signal；
S1612：The frequency-region signal computing system of signal is detected using the frequency-region signal and standing wave of the reflection signal after adding up
Channel frequence response；
S1613：The channel frequence is responded and carries out Fast Fourier Transform Inverse, to obtain the channel time domain response of system；
S1621：The peak value of the channel time domain response of system is compared with the peak value of initial channel time domain response, is obtained
System standing-wave ratio.
Specifically, due to this it is cumulative after reflection signal in, standing wave detect signal reflection signal and baseband signal it is anti-
The signal-to-noise ratio for penetrating signal is comparatively fast more than predetermined threshold value, i.e., the baseband signal can be ignored substantially, at this point it is possible to which this is added up
Reflection signal afterwards regards the reflection signal of the standing wave detection signal after adding up as, is denoted as y signals.Wherein it is possible to will initially send
Standing wave detection signal be denoted as x signals, will it is cumulative after reflection signal y and standing wave detection signal x carry out fast Fourier respectively
Transformation can respectively obtain the frequency-region signal FFT of the frequency-region signal FFT (y) and standing wave detection signal of the reflection signal after adding up
(x), then calculate the frequency-region signal FFT's (y) of the reflection signal after this adds up and frequency-region signal FFT (x) of standing wave detection signal
Ratio FFT (y)/FFT (x) can obtain the channel frequence response H of system, channel frequency domain response H is then carried out quick Fu
In leaf inverse transformation IFFT (H), then can obtain channel time domain response F (t)=IFFT (H) of system.When the channel of acquisition system
After the peak value of domain response F (t) and the peak value of initial channel DELAY RESPONSE, the two is compared, then can obtain staying for system
Bobbi.
In other embodiments, the reflection signal can also be carried out before it will reflect signal and carry out periodic inversion
Time-delay alignment, so that positive and negative amplitude of the reversion starting point close to the reflection signal of standing wave detection signal in reflection signal
Transfer point, and then channel time delay can be reduced to subsequently cumulative influence.
Specifically as shown in fig. 7, the application method for detecting standing wave 3rd embodiment is in the application method for detecting standing wave first
On the basis of embodiment, before step S14, further comprise：
S21：Calculate the time delay of the reflection signal；
Since there are time delays to be likely to be received when the reflection signal receiving point receives the reflection signal for transmission channel
May not be the reflection signal of first data of transmission, such as first data that standing wave detection signal A1 is sent in Fig. 4 (a)
It is a1, since channel is there are time delay, first number of the reflection signal A2 of standing wave detection signal in the reflection signal received
According to not being a1, it may be possible to a5 or a10 etc..At this point, in order to enable when subsequent reflection signal period sex reversal, after the reversion so that
The amplitude of the reflection signal A2 of standing wave detection signal is largely true amplitude or is negative amplitude, needs to obtain the reflection signal
Time delay, to carry out time-delay alignment.
Specifically, in an application examples, periodical comparison can be carried out by the reflection signal that will be received, acquisition connects
The lead time is subtracted reflection letter by the first data lead time corresponding with the identical data of amplitude in next period received
Number period, you can to obtain the time delay of the reflection signal.In addition it is also possible to use a known signal logical by the transmission in advance
The signal obtained behind road is compared with the known signal that this initially sends, and obtains the time delay of the transmission channel, as the reflection
The time delay of signal.It is, of course, also possible to using other time-delay calculation methods, calculated for example, by using formula etc., do not do specific limit herein
It is fixed.
S22：The reflection signal is subjected to time-delay alignment, so that each periodicity of the reflection signal after time-delay alignment is anti-
Turn the starting point that amplitude of bearing is reflected in signal that starting point detects signal close to standing wave.
Specifically, in an application examples, obtain the reflection signal when delay, can to the reflection signal carry out time delay
It is aligned, such as the reflection signal is postponed to the time delay of acquisition backward, then after time-delay alignment, when subsequently carrying out periodic inversion,
The reversion starting point in each period can detect the starting point for reflecting the negative amplitude in each period in signal of signal with the standing wave
It overlaps.But the delay data is there may be error, the reflection signal obtained after the time-delay alignment, is carrying out periodic inversion
When, the reversion starting point in each period detects the starting for reflecting the negative amplitude in each period in signal of signal close to the standing wave
Point, i.e., it is misaligned, such as reversion starting point is-a2 after the reflected signal delay alignment of standing wave detection signal in Fig. 4 (e), without
- a1, as long as at this point, error be no more than permissible range (such as 1/5 period) when, then in the reflection signal after periodic inversion,
The reflection signal period property characteristic of standing wave detection signal still has, such as standing wave detects the reflection signal of signal in Fig. 4 (f)
After reversion, periodically still have, only the period become T, it is follow-up cumulative to remain able to achieve the purpose that promote signal-to-noise ratio.Cause
This, can achieve the purpose that promote signal-to-noise ratio using better simply time-delay alignment, while will not excessively increase the calculating of system
Complexity.
As shown in figure 8, the application standing wave detecting device first embodiment 30 includes：
Signal generator 301 detects signal for generating standing wave, and standing wave detection signal includes positive and negative alternate period letter
Number；
Radiating circuit 302, connection signal generator 301 are sent for that will emit signal by transmission channel, wherein
Transmitting signal includes standing wave detection signal and baseband signal；
Reflection receivable circuit 303, connect radiating circuit 302, for receives emit signal generated in transmission process it is anti-
Penetrate signal；
Signal processing circuit 304, connection reflection receivable circuit 303 carry out periodic inversion for that will reflect signal, also use
It adds up preset times in by the reflection signal after periodic inversion, so that standing wave detection signal in the reflection signal after cumulative
The signal-to-noise ratio for reflecting signal and the reflection signal of baseband signal is more than predetermined threshold value, and using the reflection signal after adding up using frequency
Domain method for reflection determines system standing-wave ratio.
Optionally, which further comprises：
Signal circuit for reversing 3041 is reversed to just for standing wave to be detected at least partly negative amplitude of reflection signal of signal
Amplitude.
The signal circuit for reversing 3041 is additionally operable to reflect at least partly positive width of the reflection signal of baseband signal in signal
Value is reversed to negative amplitude, so that the reflection signal of baseband signal is at least partly cancelled out each other in cumulative back reflection signal.
Specifically, in an application examples, in conjunction with shown in Fig. 9, which can also include transmission channel
And feedback channel, the transmission channel include but not limited to digital pre-distortion DPD, digital analog converter DAC, transmitter TX, duplexer
DUP, antenna, load, the feedback channel include but not limited to bounce receivers Feedback RX, analog-digital converter ADC, add up
Device AAC, fast Fourier transform circuit FFT, standing-wave ratio counting circuit etc..Wherein, which can also generate base
Band signal, the standing wave detection signal can also be stored directly in memory (such as RAM (Random-Access Memory, with
Machine access memory)) in data, it is only necessary to the data are directly superimposed to send in baseband signal using adder.
Fig. 9 is further regarded to, when standing wave detection data is added in baseband signal, which can also be detected and be believed
Number carry out gain/power control Gain Control, which can also directly be a signal processing core
Piece can also be integrated with signal circuit for reversing 3041, AAC, fft circuit, standing-wave ratio counting circuit.
In the present embodiment, the concrete function of above-mentioned component realizes that process can refer to the application first to any implementation of third
The content of example, is not repeated herein.
As shown in Figure 10, the application standing wave detecting device second embodiment 40 is implemented with the application standing wave detecting device first
The structure of example is similar, the difference is that, the present embodiment standing wave detecting device 40 further comprises：Time-delay alignment circuit 305, coupling
Be connected between reflection receivable circuit 303 and signal processing circuit 304, for calculates reflection signal time delay, will reflect signal into
Row time-delay alignment, so that each periodic inversion starting point of the reflection signal after time-delay alignment detects the anti-of signal close to standing wave
It penetrates in signal and bears the starting point of amplitude.
In the present embodiment, which calculates reflected signal delay and reflection signal is carried out time-delay alignment
Detailed process the method that is provided of the application method for detecting standing wave 3rd embodiment can be provided, be not repeated herein.
As shown in figure 11, the application standing wave detecting device 3rd embodiment 50 is implemented with the application standing wave detecting device first
The structure of example is similar, the difference is that, in the present embodiment standing wave detecting device 50, which further wraps
It includes：
Channel response counting circuit 3042, for the channel response using the reflection signal computing system after adding up；
Standing-wave ratio counting circuit 3043 connects the channel response counting circuit 3042, is used for the channel response of the system
It is compared with initial channel response, determines system standing-wave ratio.
Optionally, which is further used for the reflection signal after adding up and standing wave detection letter
Number carry out Fast Fourier Transform (FFT) respectively, using obtain it is cumulative after reflection signal frequency-region signal and standing wave detect signal
The channel frequence of frequency-region signal computing system responds, and the channel frequence is responded and carries out Fast Fourier Transform Inverse, to obtain
The time domain response in the channel of system；
The standing-wave ratio counting circuit 3043 is specifically used for the peak value of the channel time domain response of system and initial channel time domain
The peak value of response is compared, and obtains system standing-wave ratio.
In the present embodiment, 3043 computing system standing-wave ratio of the channel response counting circuit 3042 and standing-wave ratio counting circuit
Detailed process can refer to the method that the application method for detecting standing wave the first and second embodiments are provided, and be not repeated herein.
In the present embodiment, which can also include time-delay alignment circuit, and time-delay alignment circuit connection should
Reflection receivable circuit and the signal processing circuit, wherein the specific work process of the time-delay alignment circuit can refer to the application
The method that method for detecting standing wave 3rd embodiment is provided, is not repeated herein.
As shown in figure 12, the application has in one embodiment of device of store function, should be with the device 60 of store function
Be stored with instruction 601, the instruction be performed realization such as the application method for detecting standing wave first to third any embodiment or
The method that its combination not conflicted is provided.
Wherein, can be portable storage media such as USB flash disk, CD with the equipment 60 of store function, can also be base station,
Server or the individual components that can be integrated in base station, such as control chip etc..
The foregoing is merely presently filed embodiments, are not intended to limit the scope of the claims of the application, every to utilize this
Equivalent structure or equivalent flow shift made by application specification and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field includes similarly in the scope of patent protection of the application.
Claims (13)
1. a kind of method for detecting standing wave, which is characterized in that including：
It generates standing wave and detects signal, the standing wave detection signal includes positive and negative alternate periodic signal；
Transmitting signal is sent by transmission channel, wherein the transmitting signal includes the standing wave detection signal and base band
Signal；
Receive the reflection signal that the transmitting signal generates in transmission process；
The reflection signal is subjected to periodic inversion；
The reflection signal after periodic inversion is added up preset times, so that described in the reflection signal after cumulative
Standing wave detects the reflection signal of signal and the signal-to-noise ratio of the reflection signal of the baseband signal is more than predetermined threshold value；
System standing-wave ratio is determined using the reflection signal after cumulative.
2. according to the method described in claim 1, it is characterized in that, described carry out periodic inversion packet by the reflection signal
It includes：
At least partly negative amplitude periodic inversion that the standing wave is detected to the reflection signal of signal is true amplitude.
3. according to the method described in claim 2, it is characterized in that, described also wrap reflection signal progress periodic inversion
It includes：
At least partly true amplitude periodic inversion by the reflection signal of baseband signal described in the reflection signal is negative amplitude,
So that the reflection signal of baseband signal described in the reflection signal is at least partly cancelled out each other after cumulative.
4. method according to any one of claims 1 to 3, which is characterized in that described that the reflection signal is carried out the period
Before sex reversal, further comprise：
Calculate the time delay of the reflection signal；
The reflection signal is subjected to time-delay alignment, so that each periodic inversion of the reflection signal after time-delay alignment
The starting point of amplitude is born in the reflection signal that starting point detects signal close to the standing wave.
5. method according to any one of claims 1 to 3, which is characterized in that the reflection using after adding up is believed
Number determine system standing-wave ratio include：
Utilize the channel response of the reflection signal computing system after adding up；
The channel response and initial channel response are compared, determine the system standing-wave ratio.
6. according to the method described in claim 5, it is characterized in that,
The channel response using the reflection signal computing system after cumulative includes：
The reflection signal and standing wave detection signal after will be cumulative carry out Fast Fourier Transform (FFT) respectively, to respectively obtain
The frequency-region signal of the frequency-region signal of the reflection signal after cumulative and standing wave detection signal；
The frequency-region signal that signal is detected using the frequency-region signal and the standing wave of the reflection signal after adding up calculates the system
The channel frequence of system responds；
The channel frequence is responded and carries out Fast Fourier Transform Inverse, to obtain the channel time domain response of the system；
It is described to be compared the channel response and initial channel response, determine that the system standing-wave ratio includes：
The peak value of the channel time domain response of the system is compared with the peak value of initial channel time domain response, obtains the system
System standing-wave ratio.
7. a kind of standing wave detecting device, which is characterized in that including：
Signal generator detects signal for generating standing wave, and the standing wave detection signal includes positive and negative alternate periodic signal；
Radiating circuit connects the signal generator, is sent by transmission channel for that will emit signal, wherein the hair
It includes the standing wave detection signal and baseband signal to penetrate signal；
Reflection receivable circuit connects the radiating circuit, the reflection generated in transmission process for receiving the transmitting signal
Signal；
Signal processing circuit connects the reflection receivable circuit, for the reflection signal to be carried out periodic inversion, is additionally operable to
The reflection signal after periodic inversion is added up preset times, so that standing wave described in the reflection signal after cumulative
The signal-to-noise ratio for detecting the reflection signal of reflection signal and the baseband signal of signal is more than predetermined threshold value, and using after cumulative
The reflection signal determines system standing-wave ratio.
8. device according to claim 7, which is characterized in that the signal processing circuit further comprises：
Signal circuit for reversing, for being by at least partly negative amplitude periodic inversion of the reflection signal of standing wave detection signal
True amplitude.
9. device according to claim 8, which is characterized in that the signal circuit for reversing is further used for the reflection
At least partly true amplitude periodic inversion of the reflection signal of baseband signal described in signal is negative amplitude, so that institute after cumulative
The reflection signal for stating baseband signal described in reflection signal is at least partly cancelled out each other.
10. device according to any one of claims 7 to 9, which is characterized in that described device further comprises：Time delay pair
Neat circuit is coupled between the reflection receivable circuit and the signal processing circuit, for calculate it is described reflection signal when
Prolong, the reflection signal is subjected to time-delay alignment, so that each periodic inversion of the reflection signal after time-delay alignment
The starting point of amplitude is born in the reflection signal that starting point detects signal close to the standing wave.
11. device according to any one of claims 7 to 9, which is characterized in that the signal processing circuit is further wrapped
It includes：
Channel response counting circuit, for the channel response using the reflection signal computing system after adding up；
Standing-wave ratio counting circuit connects the channel response counting circuit, for responding the channel response and initial channel
It is compared, determines the system standing-wave ratio.
12. according to the devices described in claim 11, which is characterized in that
The channel response counting circuit is further used for the reflection signal after adding up and standing wave detection signal point
Fast Fourier Transform (FFT) is not carried out, the frequency-region signal and standing wave detection letter of the reflection signal after adding up using what is obtained
Number frequency-region signal calculate the system channel frequence response, and by the channel frequence respond carry out fast Fourier contravariant
It changes, to obtain the channel time domain response of the system；
The standing-wave ratio counting circuit is further used for the peak value of the channel time domain response of the system and initial channel time domain
The peak value of response is compared, and obtains the system standing-wave ratio.
13. a kind of device with store function, is stored with instruction, which is characterized in that described instruction is performed realization as weighed
Profit requires 1-6 any one of them methods.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101958756A (en) * | 2010-02-11 | 2011-01-26 | 华为技术有限公司 | Standing wave detection method, standing wave detection device and base station |
| WO2011098021A1 (en) * | 2010-02-11 | 2011-08-18 | 华为技术有限公司 | Standing wave detection method, standing wave detection device and base station thereof |
| CN102325339A (en) * | 2011-07-22 | 2012-01-18 | 京信通信系统（中国）有限公司 | Standing wave detection method and device and radio remote unit |
| CN102511139A (en) * | 2011-11-28 | 2012-06-20 | 华为技术有限公司 | Standing wave detection method and device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101958756A (en) * | 2010-02-11 | 2011-01-26 | 华为技术有限公司 | Standing wave detection method, standing wave detection device and base station |
| WO2011098021A1 (en) * | 2010-02-11 | 2011-08-18 | 华为技术有限公司 | Standing wave detection method, standing wave detection device and base station thereof |
| CN102325339A (en) * | 2011-07-22 | 2012-01-18 | 京信通信系统（中国）有限公司 | Standing wave detection method and device and radio remote unit |
| CN102511139A (en) * | 2011-11-28 | 2012-06-20 | 华为技术有限公司 | Standing wave detection method and device thereof |
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