CN101145860A - Device for real time correction of channel phase amplitude - Google Patents
Device for real time correction of channel phase amplitude Download PDFInfo
- Publication number
- CN101145860A CN101145860A CNA2007100724855A CN200710072485A CN101145860A CN 101145860 A CN101145860 A CN 101145860A CN A2007100724855 A CNA2007100724855 A CN A2007100724855A CN 200710072485 A CN200710072485 A CN 200710072485A CN 101145860 A CN101145860 A CN 101145860A
- Authority
- CN
- China
- Prior art keywords
- signal
- switch
- input
- frequency
- attenuator
- 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
Abstract
The invention provides a real-time channel phase and magnitude correction device and a method thereof. The invention is comprised of a switch (3), a switch (4), a switch (16), a phase-locked source (17), a mixer (18), a power amplifier (19), a 0-60dB attenuator (20), a frequency synthesizer (25), a frequency sweep source (21), an amplifier (22), a filter (23), a 0-60dB attenuator (24) and a signal processor. By applying the real-time dynamic correction, the invention overcomes the problems that the existing correction system uses system compensation or software to correct the phase and magnitude according to a certain state and can't realize the dynamic correction. The invention corrects the temperature drift and noise ratio change with the time of vphi, and provides a phase noise random transformation system, thereby realizing the high precision direction finding.
Description
Technical field
The invention belongs to the signal detection technique field.
Background technology
Accurately direction finding is the most important technical indicator of a measurement receiver quality.By phase-interferometer direction finding error formula
As can be known, spacing L one timing between frequency certain (being that λ is certain) and antenna, the direction finding error depends on the phase difference V of two channels
, therefore accurately direction finding is exactly the phase difference V that guarantees two channels
Minimum.The error that the current measure of generally taking is a bucking-out system or with the phase difference of the method for software compensation two-way, but these methods are not accomplished the dynamic real-time compensation.Because the active device in the direction finding channel, even passive device is subjected to temperature and The noise, and the phase difference of its two-way is at random variation.Therefore must take effective method, the phase difference of dynamic compensation two-way could be realized high-precision direction finding in real time.
Summary of the invention
The present invention relates to the accurate direction finding of a kind of phase-interferometer, make the direction finding error
V in the formula
Minimum is with the real time correction of channel phase of realization high-precision direction finding and the device and method of amplitude.
The object of the present invention is achieved like this: the device of real time correction of channel phase of the present invention and amplitude is made up of switch 3, switch 4, switch 16, phase locked source 17, frequency mixer 18, power amplifier 19,0-60dB attenuator 20, Frequency Synthesizer 25, Sweep Source 21, amplifier 22, filter 23,0-60dB attenuator 24 and signal processor; Switch 3, switch 4 connect antenna 1 and antenna 2; The two-way output control switch 3 of signal processor 12, the two ends of switch 4; Phase locked source 17 and Frequency Synthesizer 25 signals are as local vibration source; Frequency mixer 18 is through attenuators 20, connects control switch 16 and switch 3, switch 4 by signal processor; One tunnel output of signal processor 12 connects control Sweep Source 21, the output of Sweep Source 21 is through amplifier 22, filter 23, attenuator 24 via the 0-60dB of signal processor 12 control connects control switchs 16 again, is input to signal processor 12 control switchs 3, switch 4 more simultaneously.
Bearing calibration based on the device of real time correction of channel phase and amplitude is: its means for correcting is made up of switch 3, switch 4, switch 16, phase locked source 17, frequency mixer 18, power amplifier 19,0-60dB attenuator 20, Frequency Synthesizer 25, Sweep Source 21, amplifier 22, filter 23,0-60dB attenuator 24 and signal processor 12; Switch 3, switch 4 are connected the signal by antenna 1 and antenna 2 inputs usually, and its direction-finding device carries out direction finding to signal; When signal pulse width 〉=0.6 μ s, after the signal pulse, its pulse back edge of signal processor 12 usefulness postpones pulse greater than 0.3 μ s of 0.2-0.5 μ s generation and closes the switch 3 of connection signal, an end of switch 4, and connect the switch 3 of same calibration source, the other end of switch 4, connect the interior signal of pulsewidth of 0.3 later μ s of broad pulse 0.3 μ s simultaneously to calibrate; When signal pulsewidth＜0.6 μ s, adopt phase locked source f
IL17 and Frequency Synthesizer f
S1-225 signals go out signal f as local vibration source by frequency mixer 18 mixing
S1-2-f
1L=f
sPromptly identical with frequency input signal, through attenuator 20, its attenuation is by the size of signal processing function according to the signal input, the control attenuator, make the power and the input signal of this signal basic identical, by signal processor gating switch 16, this signal of gating is input to switch 3, switch 4 simultaneously, connect this signal simultaneously by signal processor 12 assurance switches 3, switch 4, the phase-amplitude of channel is calibrated; Perhaps utilize Sweep Source 21 by signal processor 12 controls, making the frequency of Sweep Source vibration is the signal frequency that antenna 1, antenna 2 are input to switch 3, switch 4, this signal is through the filtering of amplifier 22 amplifications, filter 23, decay via the attenuator 20 of the 0-60dB of signal processor 12 control again and become the degree similar to input signal power, with this signal this signal of switch 16 gatings through signal controlling, be input to switch 3, switch 4 more simultaneously by signal processor 12 control gatings, import this signal simultaneously, to carry out the phase amplitude calibration of channel.
Described signal processor 12, when signal pulse be broad pulse, when being τ 〉=0.6 μ s, then after 0.3 μ s, postpone 0.2-0.5 μ s, produce pulse control switch 3, the switch 4 of one 0.3 μ s, connect calibrating signal, and the signal of generation control switch 16, with the pulse modulated signal of 0.3 μ s, be input to switch 3, switch 4 simultaneously, carry out the channel phase amplitude calibration; Then the trailing edge delay 0.2-0.5 μ s of signal processor 12 and signal pulse produces the pulse of one 0.3 μ s, open switch 3, switch 4, the gating calibrating signal, synchronous signal processor 12 produces control switch 16, gating attenuator 20 and attenuator 24 input signals, make this signal be input to switch 3, switch 4 simultaneously, and produce the 6Bit signal of control 0-60dB attenuators 20 or 24 by signal processor 12, control its attenuator and attenuate the signal to and be input to switch 3, power that switch 4 signals are identical.
Phase locked source 17 and Frequency Synthesizer 25 through frequency mixer 18, carry out mixing with this two signal and produce signal with its input signal same frequency, as calibrating signal; Because Frequency Synthesizer is subjected to signal processor 12 controls, the frequency that receives according to instantaneous frequency measurement receiver, through selecting, select its tracking frequency, the frequency that control is combined frequently is as local oscillation signal, with the high intermediate frequency signal mixing of phase locked source 17 generations, by the signal of frequency mixer with these two signal mixings generations and input signal same frequency, through the amplification of amplifier 19, be input to attenuator 20 again, make its amplitude fading to identical with input signal amplitude by signal processor 12 controls.
The objective of the invention is in the time can not realizing dynamic compensation, to adopt a kind of system of real-Time Compensation, calibrate the phase difference of two channels with systematic error compensation or according to the software compensation of certain state
Its change at random with temperature, signal to noise ratio, phase noise is changed, to realize high-precision direction finding.
Essence of the present invention is exactly in the forward part phase place (or amplitude) of measuring each radar pulse signal or pulse signal afterwards, the back of forward part with pulse back edge or pulse opened the switch of front end along producing a ripple door, and two channels of contrast phase are imported the phase difference that same calibration pulse signal is surveyed two channels simultaneously.The phase place that two channels are surveyed two channels to signal pulse is
And the two paths of signals phase difference that same pulse signal records is a V
ψ', if pulse signal and calibration pulse signal interval time V
t' very little, then
At this moment by signal processor, with the phase place addition that records for twice, then
The concrete course of work of the present invention describes in conjunction with Fig. 1.The signal process that antenna 1,2 receives is by microwave front end 5 and 6, high intermediate frequency combination 7 and 8, intermediate frequency and video combination 9 and lO and phase-locked 11 direction-finding devices of forming, carrying out phase demodulation and amplitude handles, be input to signal processor, calculate signal incidence angle θ, the size of finishing direction finding and detecting amplitude, its angle error is:
The present invention makes exactly dynamically
Minimum, its course of work is such:
1. Fig. 1 has provided the composition of device of the present invention, and it is made up of switch 3, switch 4, switch 16, Sweep Source 21, amplifier 22, filter 23, attenuator 24, phase locked source 17, Frequency Synthesizer 25, frequency mixer 18, power amplifier 19, attenuator 20, signal processor 12.Switch 16 is switches of gating calibration source, and by signal processor control, when signal 〉=0.6 μ s, then 0.3 later μ s pulsewidth of gating signal 0.3 μ s is made calibrating signal; Gating Sweep Source or the signal that produced after mixing by phase locked source and Frequency Synthesizer are as calibrating signal when signal pulse＜0.6 μ s.Sweep Source 21 is subjected to the control of signal processor, signal processor is operated on the frequency of input signal according to the FREQUENCY CONTROL Sweep Source of institute's tracking signal, this signal is input to attenuator 24 through amplifier 22 amplifications and filter 23 filtering again, signal processor is according to the size of input signal, the control attenuator makes the signal of its output equate with the amplitude of the signal of input.The signal of the signal of phase locked source 17 and Frequency Synthesizer 25 is input to frequency mixer 18, get its lower sideband through after the mixing, it just in time is the frequency of input signal, be input to attenuator 20 after amplifying through power amplifier 19 again, by the size control attenuator 20 of signal processor, make the amplitude of its output signal identical with input signal according to input signal.
2. the course of work: when input signal is broad pulse (〉=0.6 μ s), the preceding 0.3 μ s of signal pulse enters two passages respectively by switch 1,2 and carries out direction finding, 0.31 after the μ s, produce the ripple gate pulse of one 0.31 μ s with the trailing edge delay 0.2 μ s of 0.3 μ s by signal processor, open switch 3,4, the signal of closing antenna 1,2 sensitivities enters channel, and by signal processor control switch 16, gating is input to two channels of switch 3,4 correspondences simultaneously by the signal of switch 1 sensitivity.The signal f of 1,2 pairs of sensitivities of antenna
sCarry out direction finding, its
For:
And the later pulse signal by the responsive 0.3 μ s of an antenna of 0.3 μ s enters two channel direction findings, its simultaneously
Signal processor with the phase place that twice direction finding addition obtains is:
Work as V
tDuring=0.2 μ s, V
ψ≈ V
ψ', then
Very little, then
Also very little, angle measurement accuracy is just inevitable very high.
When pwm input signal＜0.6 μ s need the time owing to open to close, can not be again with preceding 0.3 μ s to signal direction-finding, calibrate with back 0.3 μ s.But the signal that adopts Sweep Source 21 or phase locked source 17 generations is narrated their course of work respectively as calibrating signal.
When the pulsewidth τ of input signal＜0.6 μ s, be input in corresponding two channels by switch 3,4 by signal pulse, carry out direction finding, its phase place
For:
After＜0.6 μ s pulse, use thereafter along postponing 0.2 μ s, the ripple gate pulse of one 0.3 μ s of generation by signal processor, control switch 3,4, the shutdown signal pulse input end is opened the input of calibrating signal, the signal branch of signal processor control switch 16 gating phase locked sources generation at this moment.The signal f that phase locked source produces
17With Frequency Synthesizer signal f
25Carry out mixing, its output signal is: f
s=f
17-f
25Just in time equal the frequency of signal, be input to amplifier, be input to the attenuator 20 of 0-60dB again, by the size of signal processor according to signal amplitude, control attenuator 20, make the signal of attenuator output and the signal amplitude basically identical of antenna 1,2 sensitivities,, this signal is input to two channels simultaneously by switch 16, carry out direction finding, phase place at this moment is:
Signal processor will
With
Addition, then
For:
By Vt=0.2 μ s,
With V
ψ' differ very little, promptly
Its
Very little, just
Accomplish dynamic phase alignment, realized high-precision direction finding.
When the pulse duration of input signal＜0.6 μ s, the signal that produces with Sweep Source is as calibrating signal, and the course of work is such: the signal pulse of τ＜0.6 μ s, and after antenna 1,2 sensitivities, be input to two channels by switch 3,4 and carry out direction finding, its
For:
The Sweep Source signal is controlled by signal processor, make the signal of its Sweep Source identical, amplify filter 23 filtering through amplifier 22 again with the frequency of the signal of antenna 1,2 inputs, be input to the attenuator 24 of O-60dB, by the amplitude of signal processor according to antenna 1,2 sensitive signals, the control attenuator makes the amplitude of signal of attenuator 24 output identical with the signal amplitude of antenna 1,2 sensitivities, by switch 16, be input to switch 3,4 simultaneously, and by two channel direction findings, its phase place
For:
Signal processor will
With
Addition draws
Since Vt=0.2 μ s, V
ψAnd V
ψ' equal substantially, promptly
Wherein
Very little, thereby
Also very little, accomplished the dynamic phasing calibration, realize high-precision direction finding.
The present invention is behind each input signal pulse 0.2 μ s, calibrates with calibrating signal, owing to have only 0.2 μ s, the state variation of two channels is little, it is basic identical to can be considered two states, and has guaranteed that the real-time frequency of two kinds of signals is identical identical with amplitude, therefore
Very little, this has just guaranteed
Also very little, accomplished real-time dynamic calibration, realized high-precision direction finding.
Description of drawings
Fig. 1 is a composition schematic diagram of the present invention.
Embodiment
For example the present invention is described in further detail below in conjunction with accompanying drawing.
In conjunction with Fig. 1, it has switch 3, switch 4, switch 16, signal processor 12, the attenuator 20 of phase locked source 17, Frequency Synthesizer 25, frequency mixer 18, power amplifier 19,0-60dB, compositions such as the attenuator 24 of Sweep Source 21, amplifier 22, filter 23,0-60dB, signal processor 12.Switch 3, switch 4 are single-pole single-throw switch (SPST), connect the signal of antenna 1, antenna 2 inputs, switch 16 SP3T switches, and calibration signal source has three kinds: the 1. latter half of signal pulse; 2. the signal that produces through frequency mixer by phase locked source and Frequency Synthesizer; 3. the signal that produces by Sweep Source.The course of work is such: the signal by antenna 1, antenna 2 receive, and be input to two channels through switch 3, switch 4 input signal is carried out direction finding, be input to the phase place of signal processor
First kind of situation, pulsewidth when input signal〉during 0.6 μ s, get 0.3 μ s as signal direction-finding, and the trailing edge of 0.3 μ s, by signal processor 12, it is postponed the pulse control switch 3 that 0.2～0.5 μ s produces one 0.3 μ s, switch 4, close antenna 1, the signal of antenna 2 enters channel, opens two switch terminals that connect calibration signal source, makes same calibrating signal enter two channels, and by signal processor 12 control gating switches 16, gating is by the input signal of antenna 1, switch 3, the later input signal of switch 4 gatings, 0.3 μ s, the width signal of 0.3 μ s is a calibrating signal, carry out direction finding, wherein
Because the time difference of input signal and calibrating signal has only Δ t=0.2～0.5 μ s, therefore,
Promptly
Promptly very little, through signal processor the phase place that records for twice is carried out addition, draw:
Finished phase alignment, amplitude calibration is as the same.
When second kind of situation is width τ＜0.6 μ s when signal pulse.Edge behind the signal processor 12 employing signal pulses postpones O.2～0.5 μ s, produces the pulse of one 0.3 μ s, closes antenna 1, antenna 2 signal input parts, opens the switch 3 that connects calibration signal source, the terminal of switch 4.At this moment the signal processor control switch 16, and the signal of the attenuator 20 of gating 0-60dB or attenuator 24 inputs, signal processor 12 is according to input signal power intensity, and the signal strength signal intensities that make attenuator 20 or 24 outputs are with identical by antenna 1, antenna 2 input signal strengths.Generation as for these two unlike signals is such: 1. the frequency of the signal of phase locked source 17 generations is f
HIF, and the frequency that Frequency Synthesizer produces is f
HIF-f
S, the frequency that produces after frequency mixer 18 mixing is f
HIF-(f
HIF-f
S)=f
SPromptly the signal frequency with antenna 1, antenna 2 inputs is identical, with this signal, amplifies and 20 decay of 0-60dB attenuator through amplifier 19, simultaneously by switch 16 input switches 3, switch 4, enter again than phase channel, will be through signal processor 12 to the direction finding and the calibrating signal direction finding addition of signal, then
Finished phase alignment, amplitude calibration is as the same.
2. Sweep Source 21 is subjected to the control of signal processor 12, signal processor is the signal frequency fS of antenna 1, antenna 2 inputs according to the frequency of oscillation of the selected signal frequency control Sweep Source of instantaneous frequency measurement and signal sorting and tracker, amplify through amplifier 22, the filtering of filter 23, be input to 0-60dB attenuator 24, attenuator is subjected to signal processor 12 controls, make power identical with the power of antenna 1, antenna 2 output signals, with this signal, import two passage direction findings simultaneously by switch 3, switch 4, by signal processor 12 addition is carried out in twice direction finding equally and obtained.
Finished the phase alignment of channel, amplitude calibration is as the same.
Claims (4)
1. the device of a real time correction of channel phase amplitude is characterized in that: it comprises that switch (3), switch (4), switch (16), phase locked source (17), frequency mixer (18), power amplifier (19), 0-60dB attenuator (20), Frequency Synthesizer (25), Sweep Source (21), amplifier (22), filter (23), 0-60dB attenuator (24), signal processor (12) form; Switch (3), switch (4) connect antenna (1) and antenna (2); The two-way output control switch (3) of signal processor (12), the two ends of switch (4); Phase locked source (17) and Frequency Synthesizer (25) signal are as local vibration source; Frequency mixer (18) is through attenuator (20), connects control switch (16) and switch (3), switch (4) by signal processor; One tunnel output of signal processor (12) connects control Sweep Source (21), the output of Sweep Source (21) is through amplifier (22), filter (23), attenuator (24) via the 0-60dB of signal processor (12) control connects control switch (16) again, is input to signal processor (12) control switch (3), switch (4) more simultaneously.
2. bearing calibration based on the device of real time correction of channel phase amplitude is characterized in that: its means for correcting is by switch (3), switch (4), switch (16), phase locked source (17), frequency mixer (18), power amplifier (19), 0-60dB attenuator (20), Frequency Synthesizer (25), Sweep Source (21), amplifier (22), filter (23), 0-60dB attenuator (24), signal processor (12); Switch (3), switch (4) are connected the signal by antenna (1) and antenna (2) input usually, and its direction-finding device carries out direction finding to signal; When signal pulse width 〉=0.6 μ s, after the signal pulse, signal processor (12) postpones pulse greater than 0.3 μ s of 0.2-0.5 μ s generation with its pulse back edge and closes the switch (3) of connection signal, an end of switch (4), and connect the switch (3) of same calibration source, the other end of switch (4), connect the interior signal of pulsewidth of 0.3 later μ s of broad pulse 0.3 μ s simultaneously to calibrate; When signal pulsewidth＜0.6 μ s, adopt phase locked source f
IL(17) and Frequency Synthesizer f
S1-2(25) signal goes out signal f as local vibration source by frequency mixer (18) mixing
S1-2-f
IL=f
SPromptly identical with frequency input signal, through attenuator (20), its attenuation is by the size of signal processing function according to the signal input, the control attenuator, make the power and the input signal of this signal basic identical, by signal processor gating switch (16), this signal of gating is input to switch (3), switch (4) simultaneously, connect this signal simultaneously by signal processor (12) assurance switch (3), switch (4), the phase-amplitude of channel is calibrated; Perhaps utilize Sweep Source (21) by signal processor (12) control, making the frequency of Sweep Source vibration is antenna (1), antenna (2) is input to switch (3), the signal frequency of switch (4), this signal amplifies through amplifier (22), the filtering of filter (23), decay via the attenuator (20) of the 0-60dB of signal processor (12) control again and become the degree similar to input signal power, with this signal this signal of switch (16) gating through signal controlling, be input to switch (3) more simultaneously by signal processor (12) control gating, switch (4), import this signal simultaneously, to carry out the phase amplitude calibration of channel.
3. the bearing calibration of the device based on real time correction of channel phase and amplitude according to claim 2, it is characterized in that: described signal processor (12), when signal pulse be broad pulse, when being τ 〉=0.6 μ s, then after 0.3 μ s, postpone 0.2-0.5 μ s, produce pulse control switch (3), the switch (4) of one 0.3 μ s, connect calibrating signal, and the signal of generation control switch (16), pulse modulated signal with 0.3 μ s, be input to switch (3), switch (4) simultaneously, carry out the channel phase amplitude calibration; Then the trailing edge delay 0.2-0.5 μ s of signal processor (12) and signal pulse produces the pulse of one 0.3 μ s, open switch (3), switch (4), the gating calibrating signal, synchronous signal processor (12) produces control switch (16), gating attenuator (20) and attenuator (24) input signal, make this signal be input to switch (3) simultaneously, switch (4), and produce the 6Bit signal of controlling 0-60dB attenuator (20) or (24) by signal processor (12), control its attenuator and attenuate the signal to and be input to switch (3), the identical power of switch (4) signal.
4. according to the bearing calibration of claim 2 or 3 described devices based on real time correction of channel phase and amplitude, it is characterized in that: phase locked source (17) and Frequency Synthesizer (25), through frequency mixer (18), this two signal is carried out mixing produce signal with its input signal same frequency, as calibrating signal; Because Frequency Synthesizer is subjected to signal processor (12) control, the frequency that receives according to instantaneous frequency measurement receiver, through selecting, select its tracking frequency, the frequency that control is combined frequently is as local oscillation signal, with the high intermediate frequency signal mixing of phase locked source (17) generation, by the signal of frequency mixer with these two signal mixings generations and input signal same frequency, through the amplification of amplifier (19), be input to attenuator (20) again, make its amplitude fading to identical with input signal amplitude by signal processor (12) control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100724855A CN101145860B (en) | 2007-07-06 | 2007-07-06 | Device for real time correction of channel phase amplitude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100724855A CN101145860B (en) | 2007-07-06 | 2007-07-06 | Device for real time correction of channel phase amplitude |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101145860A true CN101145860A (en) | 2008-03-19 |
| CN101145860B CN101145860B (en) | 2010-09-08 |
Family
ID=39208176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100724855A Expired - Fee Related CN101145860B (en) | 2007-07-06 | 2007-07-06 | Device for real time correction of channel phase amplitude |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101145860B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104854834A (en) * | 2013-10-29 | 2015-08-19 | 华为技术有限公司 | Phase noise correction method, device and system |
| CN110149157A (en) * | 2018-02-11 | 2019-08-20 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Array antenna wideband channel parallel calibration method |
| CN110299952A (en) * | 2018-10-18 | 2019-10-01 | 武汉滨湖电子有限责任公司 | A kind of series connection receives corrective network and bearing calibration |
| CN110832772A (en) * | 2017-07-11 | 2020-02-21 | 三菱电机株式会社 | Output power control device |
| CN111819461A (en) * | 2018-03-08 | 2020-10-23 | 罗伯特·博世有限公司 | Radar sensor system and method for operating a radar sensor system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6157254A (en) * | 1998-09-29 | 2000-12-05 | Lucent Technologies Inc. | Double side band pilot technique for a control system that reduces distortion produced by electrical circuits |
| CN1336721A (en) * | 2000-07-28 | 2002-02-20 | 华为技术有限公司 | Method and device for detecting weak signal of known frequency |
| CN1707980A (en) * | 2004-06-11 | 2005-12-14 | 大唐移动通信设备有限公司 | Method and system for signal synchronization between receiver-transmitter and instrument |
-
2007
- 2007-07-06 CN CN2007100724855A patent/CN101145860B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6157254A (en) * | 1998-09-29 | 2000-12-05 | Lucent Technologies Inc. | Double side band pilot technique for a control system that reduces distortion produced by electrical circuits |
| CN1336721A (en) * | 2000-07-28 | 2002-02-20 | 华为技术有限公司 | Method and device for detecting weak signal of known frequency |
| CN1707980A (en) * | 2004-06-11 | 2005-12-14 | 大唐移动通信设备有限公司 | Method and system for signal synchronization between receiver-transmitter and instrument |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104854834A (en) * | 2013-10-29 | 2015-08-19 | 华为技术有限公司 | Phase noise correction method, device and system |
| CN110832772A (en) * | 2017-07-11 | 2020-02-21 | 三菱电机株式会社 | Output power control device |
| CN110832772B (en) * | 2017-07-11 | 2024-01-02 | 三菱电机株式会社 | Output power control device |
| CN110149157A (en) * | 2018-02-11 | 2019-08-20 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Array antenna wideband channel parallel calibration method |
| CN111819461A (en) * | 2018-03-08 | 2020-10-23 | 罗伯特·博世有限公司 | Radar sensor system and method for operating a radar sensor system |
| CN110299952A (en) * | 2018-10-18 | 2019-10-01 | 武汉滨湖电子有限责任公司 | A kind of series connection receives corrective network and bearing calibration |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101145860B (en) | 2010-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101145860B (en) | Device for real time correction of channel phase amplitude | |
| CN101109798B (en) | Direction finding method of accurate direction finding device for P/L waveband radiation source | |
| CN110146864B (en) | Comprehensive calibration method and system for weather radar | |
| US9547072B2 (en) | Weather radar | |
| CN104316913B (en) | Multichannel receiver real time calibration device and calibration and error compensating method | |
| CN102770781B (en) | Pulse radar device and method for controlling the same | |
| US4568940A (en) | Dual-mode radar receiver | |
| CN104062514A (en) | Device and method for measuring pulse carrier phase noise | |
| JP4460056B2 (en) | Transceiver | |
| US11914069B2 (en) | System and MMIC architecture for coherent multi-chip phased array MIMO applications | |
| CN104501967A (en) | Wide-frequency-band radiation signal multi-channel parallel output measuring method and system thereof | |
| CN203069779U (en) | Dual polarization calibration receiver used for airborne SAR | |
| CA2561391C (en) | A versatile attenuator | |
| US6710737B1 (en) | Calibrator for radar target simulator | |
| CN103856220A (en) | Radio frequency cancellation system and method for dual-channel receiver of passive radar | |
| CN102891656A (en) | Internal detection based automatic calibrating method for broadband signal open loop power | |
| CA2049896C (en) | Angle measurement compensation technique for amplitude comparison monopulse receiver | |
| US3916316A (en) | Multichannel logarithmic RF level detector | |
| CN101199112B (en) | Feed forward amplifier system and method using the pilot frequency from a positive feedback pilot generation and detection circuit to improve second loop convergence | |
| US4587523A (en) | Radar range tracking apparatus and method | |
| CN105846916B (en) | A kind of time-delay calibration device and method towards coherent vector signal generation system | |
| CN105721076B (en) | A kind of time-delay calibration device and method towards coherent vector signal generation system | |
| CN106788792A (en) | A kind of wideband multi-channel Poewr control method for being applied to vector network analyzer | |
| US20230268893A1 (en) | Balanced power amplifier single-pole double-throw switch with offset-qpsk or iq modulator functionality | |
| JPS585386B2 (en) | How to detect angle error |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20170706 |