CN102624470B - Real-time calibration method and real-time calibration device for multi-channel transmitter radio frequency response - Google Patents
Real-time calibration method and real-time calibration device for multi-channel transmitter radio frequency response Download PDFInfo
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Abstract
The invention provides a real-time calibration method and a real-time calibration device for multi-channel transmitter radio frequency response, which relate to the technical field of wireless communication. The method includes that initial testing signals generated by a multi-channel transmitter are modulated into m-branch testing signals; the m-branch testing signals correspond to m transmitting radio frequency channels of the multi-channel transmitter respectively; transmitting radio frequency response signals of corresponding transmitting radio frequency channels are obtained at each connection position of each transmitting radio frequency channel and a transmitting antenna by using receiving channels; testing signals received by each transmitting radio frequency channel and transmitting radio frequency response signals of each transmitting radio frequency channel are used to conduct deconvolution operation and obtain response of each transmitting radio frequency channel; and compensation calibration is conducted on the transmitting radio frequency response of each transmitting radio frequency channel by using the obtained response of each transmitting radio frequency channel. The real-time calibration method and the real-time calibration device can achieve obtaining of the response of each transmitting radio frequency channel only in the multi-channel transmitter and can calibrate the transmitting radio frequency response in various application situations in real time and conveniently during actual application.
Description
Technical field
The application relates to wireless communication technology field, particularly a kind of radio-frequency responsive real-time calibration method of multichannel transmitter and device.
Background technology
Along with the development of modern communication technology, more and more higher to the test request of its equipment, not only need the reliability of testing also will take into account the high efficiency of test.
In future communications development, multi-input/output antenna technology (Multiple-InputMultiple-Output, etc. MIMO) technology will inevitably be used in future broadband wireless communication systems, the rate of information throughput can be improved like this, the more channels information brought to well utilize MIMO, will inevitably introduce many radio-frequency channels.
The calibration of launching radio-frequency channel is extremely important in the field of wireless communication, such as in the measurement of radio channel response, needs to get rid of the impact of launching radio-frequency channel response, so calibrates transmitting radio-frequency channel with regard to needs.The response of launching radio-frequency channel can change in time, the parameter such as gain, phase place of the devices such as amplifier can change along with the change of the factors such as temperature, causes in multichannel transmitting-receiving machine, and the response of each radio-frequency channel is different, and the otherness between this passage, will the deterioration of systematic function be caused.If than each channel data to be launched is mutually orthogonal originally, due to the otherness between each radio-frequency channel, after multichannel transmitter, each circuit-switched data is no longer orthogonal, will impact Data Post, channel estimating etc.
In prior art, a kind of calibration steps is connected by solid data line with calibrated channel receiver by multichannel transmitter before use, then obtain signal by calibrated channel receiver to analyze, detection calibration is carried out to the transmitting radio-frequency channel radio-frequency responsive of multichannel transmitter, ensure that the orthogonality of radio-frequency responsive is launched in each transmitting radio-frequency channel, and then utilize the complete multichannel transmitter of calibration to go to carry out follow-up test, such as to the test of wireless channel, but in actual applications, multichannel transmitter and multichannel transmitter are by wireless channel signal transmission, said method cannot be real-time, the radio-frequency responsive of multichannel transmitter is calibrated easily accurately in various application scenarios.
Summary of the invention
Technical problems to be solved in this application are to provide a kind of real-time calibration method of multichannel transmitter radio-frequency responsive, can in real time, in various application scenarios, calibrate the radio-frequency responsive of multichannel transmitter easily accurately.
In order to solve the problem, this application discloses a kind of real-time calibration method of multichannel transmitter radio-frequency responsive, comprising:
The initial test signal that multichannel transmitter produces is modulated into m drive test trial signal; Launch radio-frequency channel for m of the corresponding multichannel transmitter of described m drive test trial signal difference;
Receive path is utilized to obtain the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna;
The test signal utilizing each transmitting radio-frequency channel to receive and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, obtain the response of each transmitting radio-frequency channel;
The transmitting radio-frequency responsive of response to each transmitting radio-frequency channel of each transmitting radio-frequency channel obtained is utilized to compensate correction.
Preferably, comprise when the initial test signal that multichannel transmitter produces being modulated into m drive test trial signal:
The initial test signal that multichannel transmitter produces is modulated into m road orthogonal test signals.
Preferably, comprise when obtaining the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna:
Utilize the mixer in a receive path to be integrated by each transmitting radio-frequency responsive signal launching radio-frequency channel, obtain each road radio-frequency responsive signal sum.
Preferably, the test signal utilizing each transmitting radio-frequency channel to receive and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, comprise when obtaining the response of each transmitting radio-frequency channel:
Utilize the orthogonal test signals of each transmitting radio-frequency channel as the deconvolution factor respectively, carry out deconvolution calculating with described each road radio-frequency responsive signal sum, obtain the response of each transmitting radio-frequency channel.
Preferably, the method initial test signal that transmitter produces being modulated into m road orthogonal test signals comprises:
Binary phase shift keying modulator approach, differential phase-shift keying (DPSK) modulator approach or quarternary phase-shift keying (QPSK) modulator approach.
Preferably, described initial test signal comprises the signal on base band, intermediate frequency or radio frequency.
Preferably, described compensation correction comprises:
Compensate in described multichannel transmitter and correct or compensate correction in the multichannel receiver corresponding to described multichannel transmitter.
Accordingly, the real-time calibration system that this application discloses a kind of multichannel transmitter radio-frequency responsive comprises:
Signal modulator, the initial test signal for being produced by multichannel transmitter is modulated into m road orthogonal test signals; Launch radio-frequency channel for m of the corresponding multichannel transmitter of described m road orthogonal test signals difference;
Receive path, for obtaining the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna;
De-convolution operation device, the test signal received for utilizing each transmitting radio-frequency channel and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, obtain the response of each transmitting radio-frequency channel;
Compensation correction module, compensates correction for utilizing the transmitting radio-frequency responsive of response to each transmitting radio-frequency channel of each transmitting radio-frequency channel obtained.
Preferably, described signal modulator is quadrature modulator.
Preferably, described receive path comprises mixer; Described mixer comprises dual-frequency channel merger, tri-frequency combiner, four frequency combiners.
Compared with prior art, the application comprises following advantage:
The application utilizes the transmitting radio-frequency responsive signal obtaining corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel of multichannel transmitter and the junction of transmitting antenna, then the test signal utilizing each transmitting radio-frequency channel to receive and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, obtain the response of each transmitting radio-frequency channel, finally utilize the transmitting radio-frequency responsive of response to each transmitting radio-frequency channel of each transmitting radio-frequency channel obtained to compensate correction.In above process, can realize the acquisition of the response to each transmitting radio-frequency channel in multichannel transmitter, therefore can in actual applications in real time, in various application scenarios, calibrate the transmitting radio-frequency responsive of multichannel transmitter easily accurately.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the real-time calibration method of a kind of multichannel transmitter of the application radio-frequency responsive;
Fig. 2 is a kind of real time calibration work structuring figure based on multichannel transmitter radio-frequency responsive of the application;
Fig. 3 shows one to initial test signal by BPSK quadrature modulation method modulation example;
Fig. 4 shows the application's multichannel transmitter for frequency domain response figure before and after the correction of the initial test signal of the chirp sequence of 20MHz;
Fig. 5 is the structural representation of the real-time calibration system of a kind of multichannel transmitter of the application radio-frequency responsive.
Embodiment
For enabling above-mentioned purpose, the feature and advantage of the application more become apparent, below in conjunction with the drawings and specific embodiments, the application is described in further detail.
In practice, each transmitting radio-frequency channel i of multichannel transmitter responds x at received RF
itime can produce response y
i, the radio-frequency responsive signal launching radio-frequency channel generation is z
i, but the response y of each transmitting radio-frequency channel i under normal circumstances
ibe ignorant, and can change along with the change of applied environment, such as time variations, the parameter such as gain, phase place of the devices such as amplifier along with the change of the factors such as temperature, can launch the response y of radio-frequency channel i
ichange can be there is, if measure y not in time
ivalue, then correction is compensated to the response of the received RF of each transmitting radio-frequency channel, then can have an impact to problems such as multichannel transmitter use procedure accuracy.
With reference to Fig. 1, show the schematic flow sheet of the real-time calibration method of a kind of multichannel transmitter of the application radio-frequency responsive, specifically can comprise:
Step 110, is modulated into m drive test trial signal by the initial test signal that multichannel transmitter produces; Launch radio-frequency channel for m of the corresponding multichannel transmitter of described m drive test trial signal difference.
A multichannel transmitter comprises multiple transmitting radio-frequency channel in practice, so for initial test signal x (t) that transmitter produces, needing to be modulated into the signal of the way identical with launching radio-frequency channel number, inputting each transmitting radio-frequency channel respectively.Such as multichannel transmitter has m to launch radio-frequency channel, and initial test signal x (t) that so transmitter can be produced, is modulated to m drive test trial signal x
k(t), k=1,2 ..., m.
Described initial test signal, its form can be any one precognition signal such as linear FM signal, pseudo noise sequence (Pseudo-noise Sequence) signal or OFDM (Orthogonal FrequencyDivision Multiplexing).In addition, described initial test signal can be the signal on base band, intermediate frequency, radio frequency.Type and generation position the application of concrete initial test signal are not limited it.
Preferably, comprise when the initial test signal that multichannel transmitter produces being modulated into m drive test trial signal:
The initial test signal that multichannel transmitter produces is modulated into m road orthogonal test signals.
Such as multichannel transmitter has m to launch radio-frequency channel, and initial test signal x (t) that so transmitter can be produced, is modulated to m drive test trial signal x
k(t), k=1,2 ..., m, wherein any two signal x
kmutually orthogonal between (t).
In practice, by quadrature modulator, the initial test signal that multichannel transmitter produces is modulated into m road orthogonal test signals, the modulation system adopted can be BPSK(Binary Phase ShiftKeying, binary phase shift keying modulator approach, the one utilizing the plural wave combination departing from phase place to carry out performance information keying phase shift system), DPSK(Differential Phase Shift Keying, differential phase-shift keying (DPSK) modulator approach utilizes the change of carrier wave relative phase between code element before and after modulation signal to carry out transmission of information.) or QPS(Quadrature Phase Shift Keying, quarternary phase-shift keying (QPSK) modulator approach) etc. any one quadrature modulation mode.Concrete quadrature modulation mode the application is not limited it.
Step 120, utilizes receive path to obtain the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna.
When each transmitting radio-frequency channel receives signal x
k(t), this signal x
kt (), behind this transmitting radio-frequency channel, can produce corresponding transmitting radio-frequency responsive signal g
kt (), wherein the response of this transmitting radio-frequency channel is y
k(t), but the response of launching radio-frequency channel is in practice y
kt () is unknown, need the value testing out this response.In reality, x
k(t), y
k(t), g
kt the pass of () three is g
k(t)=x
k(t) * y
k(t), in " * " be convolution algorithm.So, the junction of receive path at each transmitting radio-frequency channel and transmitting antenna can be received on the mixer on calibrated channel, thus can obtain launch radio-frequency channel transmitting radio-frequency responsive signal and
Preferably, when the initial test signal produced by multichannel transmitter is modulated into m road orthogonal test signals, be sent to m of corresponding multichannel transmitter when launching radio-frequency channel after, comprise when obtaining the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna:
Utilize the mixer in a receive path to be integrated by each transmitting radio-frequency responsive signal launching radio-frequency channel, obtain each road radio-frequency responsive signal sum.
Further, described receive path is mixer.Described mixer can be dual-frequency channel merger, tri-frequency combiner or four frequency combiners.
Such as aforementioned multichannel transmitter has m to launch radio-frequency channel, by initial test signal x (t) that transmitter produces, is modulated to m road orthogonal test signals x
k(t), k=1,2 ..., m, wherein any two signal x
kmutually orthogonal between (t).So for each transmission channel based on corresponding x
kt transmitting radio-frequency responsive signal g that () produces
kt (), can the signal that obtains of mixer
In addition, itself can receive the transmitting radio-frequency responsive signal of corresponding number with multiple receive path.Such as launch radio-frequency channel for 8, be numbered 1-8 respectively, receive path 1 so can be set and receive the transmitting radio-frequency responsive signal that No. 1-4 is launched radio-frequency channel, receive path 2 is set and receives the transmitting radio-frequency responsive signal that No. 5-8 is launched radio-frequency channel.Concrete method to set up, the application is not limited it.
Step 130, the test signal utilizing each transmitting radio-frequency channel to receive and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, obtain the response of each transmitting radio-frequency channel.
In practice for the test signal x that each transmitting radio-frequency channel receives
kt (), after the response of this transmitting radio-frequency channel, can produce and launch radio-frequency responsive signal g
kt (), wherein the response of this transmitting radio-frequency channel is y
k(t), but the response of launching radio-frequency channel is in practice y
kt () is unknown, need the value testing out this response.In reality, x
k(t), y
k(t), g
kt the pass of () three is g
k(t)=x
k(t) * y
k(t), in " * " be convolution algorithm.
So, if obtain the x of each transmitting radio-frequency channel
k(t), g
kt (), based on above-mentioned principle, with x
kt () is the deconvolution factor, to g
kt () carries out the response y that de-convolution operation can obtain corresponding transmitting radio-frequency channel
kt (), such as, deconvolution can according to convolution theorem, g
k(t)=x
k(t) * y
kt (), is transformed into formula in frequency domain by this theorem, and G
k(f)=X
k(f) Y
kf (), so Y
k(f)=G
k(f)/X
kf (), can obtain the frequency domain value Y launching radio-frequency channel response
k(f), and then can obtain launching radio-frequency channel response y by Fourier transform
k(t).
The test signal received when each transmitting radio-frequency channel is orthogonal test signals x
kt (), utilizes a receive path that each transmitting radio-frequency responsive signal launching radio-frequency channel is carried out integration g
kt (), obtains each road radio-frequency responsive signal sum Σ g
ktime (t), the x that each transmitting radio-frequency channel receives can be utilized respectively
k(t) and Σ g
kt () carries out de-convolution operation, obtain the y of each transmitting radio-frequency channel
k(t).
Such as, radio-frequency channel is launched, the x that each passage is corresponding for aforementioned m
kt () is orthogonal test signals, utilize x
kt the orthogonality between (), for each transmission channel based on corresponding x
kt transmitting radio-frequency responsive signal g that () produces
k(t), the signal obtained by mixer
because the test signal x of any two transmitting radio-frequency channels
kt () is orthogonal, so such as k=2, x
2(t) with
in the g of k ≠ 2
k(t), such as g
1(t), g
3(t) ... g
mt (), when carrying out de-convolution operation, result is zero, can only draw the y that k=2 is corresponding
2(t).So x can be utilized
kt the orthogonality between (), by orthogonal test signals x
k(t) respectively with signal
Carry out deconvolution calculating, the response y of each transmitting radio-frequency channel can be obtained
k(t).
Step 140, utilizes the transmitting radio-frequency responsive of response to each transmitting radio-frequency channel of each transmitting radio-frequency channel obtained to compensate correction.
Pass through abovementioned steps, obtain the response of each transmitting radio-frequency channel of multichannel receiver, the transmitting radio-frequency responsive of response to each transmitting radio-frequency channel of each transmitting radio-frequency channel obtained so can be utilized to compensate correction, and wherein compensation correction operation can be exemplified below: the overall transfer characteristic of system can be expressed as H (f)=G
t(f) C (f) G
r(f), wherein G
t(f) and G
rf () is the transfer function of transmitting filter and receiving filter respectively, the transmission characteristic that C (f) is channel.Wherein G
tf () is y
kt the frequency domain representation of (), if we obtain y by this patent
kt (), can obtain G
tf (), meanwhile, if we can obtain the transmission characteristic G of receiving filter
r(f), and overall transfer characteristic H (f), wherein overall transfer characteristic we can be obtained by Y (f)=X (f) H (f) formula, wherein Y (f) is for receiving signal, and X (f) is initialization signal.So just can obtain the transmission characteristic C (f) of channel accurately in real time.
Concrete, to the compensation correction launching radio-frequency responsive, can be that the radio frequency in multichannel transmitter, intermediate frequency, base band carry out compensation correction; Also can be that the radio frequency in multichannel receiver, intermediate frequency, base band carry out compensation correction.Utilizing the received RF response of the response of each receiving RF channel obtained to each receiving RF channel to compensate correction in addition can be compensate correction in time domain, frequency domain.The position of concrete compensation correction and territory, the application is not limited it.
With reference to Fig. 2, it illustrates a kind of real time calibration work structuring figure based on multichannel transmitter radio-frequency responsive.
Step is as follows:
Step 1: in the present invention, the real time calibration structure of the radio-frequency responsive of transmitter as shown in Figure 1,8 are wherein had to send out radio-frequency channel, each radio-frequency channel connects one and send out antenna, adopt eight road mixers, and make a start that radio-frequency responsive compensates, bearing calibration is that base band is in transmitters carried out;
Step 2: modulation system adopts the modulation system of BPSK, and the modulator approach of concrete BPSK can be shown in Fig. 3, and Fig. 3 shows the orthogonal test signals of being modulated by BPSK quadrature modulation method initial test signal;
Step 3: test signal is the radiofrequency signal adopting the chirp sequence of bandwidth 120MHz to obtain through up-conversion, after modulating respectively through 8 road BPSK, test signal becomes 8 tunnel orthogonal signalling;
Step 4: 8 tunnel orthogonal signalling are combined into a road by passage and eight road mixers frequently respectively through 8 roads by 8 tunnel orthogonal signalling;
Step 5: carry out de-convolution operation with the 8 original orthogonal signalling samples in tunnel respectively by by the signal on mixer again, obtain the radio-frequency responsive of each radio-frequency channel;
Step 6: the radio-frequency responsive of each radio-frequency channel is down-converted in base band, then after being sampled by AD, be converted into 8 railway digital signals;
Step 7: 8 railway digital signals are sent into PC end, utilize the response sending out radio-frequency channel obtained, send out radio-frequency responsive to 8 tunnels and compensate correction, as shown in Figure 4, Fig. 4 shows the application's multichannel and launches for frequency domain response figure before and after the correction of the initial test signal of the chirp sequence of 20MHz.
With reference to Fig. 5, it illustrates the structural representation of the real-time calibration system of a kind of multichannel transmitter of the application radio-frequency responsive, comprising:
Multichannel transmitter 410 and PC end 420;
Described multichannel transmitter 410 comprises:
Signal modulator 411, the initial test signal for being produced by multichannel transmitter is modulated into m road orthogonal test signals; Launch radio-frequency channel for m of the corresponding multichannel transmitter of described m road orthogonal test signals difference;
Receive path 412, for obtaining the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna;
De-convolution operation device 413, the test signal received for utilizing each transmitting radio-frequency channel and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, obtain the response of each transmitting radio-frequency channel;
Described PC end 420 comprises:
Compensation correction module 421, compensates correction for utilizing the transmitting radio-frequency responsive of response to each transmitting radio-frequency channel of each transmitting radio-frequency channel obtained.
Wherein, described signal modulator is quadrature modulator.
Wherein, described receive path is mixer; Described mixer can be dual-frequency channel merger, tri-frequency combiner, four frequency combiners.
For system embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above to real-time calibration method and the system of the multichannel transmitter radio-frequency responsive that the application provides, be described in detail, apply specific case herein to set forth the principle of the application and execution mode, the explanation of above embodiment is just for helping method and the core concept thereof of understanding the application; Meanwhile, for one of ordinary skill in the art, according to the thought of the application, all will change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application.
Claims (7)
1. a real-time calibration method for multichannel transmitter radio-frequency responsive, is characterized in that, is applied to wireless channel measurement, comprising:
The initial test signal that multichannel transmitter produces is modulated into m road orthogonal test signals; Launch radio-frequency channel for m of the corresponding multichannel transmitter of described m road orthogonal test signals difference; Described modulation system comprises: binary phase shift keying modulator approach, or differential phase-shift keying (DPSK) modulator approach, or quarternary phase-shift keying (QPSK) modulator approach;
Receive path is utilized to obtain the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna; Wherein, comprise when obtaining the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna:
Utilize the mixer in a receive path to be integrated by each transmitting radio-frequency responsive signal launching radio-frequency channel, obtain each road radio-frequency responsive signal sum;
The test signal utilizing each transmitting radio-frequency channel to receive and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, obtain the response of each transmitting radio-frequency channel; Wherein, the test signal utilizing each transmitting radio-frequency channel to receive and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, comprise when obtaining the response of each transmitting radio-frequency channel: utilize the orthogonal test signals of each transmitting radio-frequency channel as the deconvolution factor respectively, carry out deconvolution calculating with described each road radio-frequency responsive signal sum, obtain the response of each transmitting radio-frequency channel;
The transmitting radio-frequency responsive of response to each transmitting radio-frequency channel of each transmitting radio-frequency channel obtained is utilized to compensate correction.
2. method according to claim 1, is characterized in that, the method that the initial test signal that transmitter produces is modulated into m road orthogonal test signals is comprised:
Binary phase shift keying modulator approach, differential phase-shift keying (DPSK) modulator approach or quarternary phase-shift keying (QPSK) modulator approach.
3. method according to claim 1, is characterized in that:
Described initial test signal comprises the signal on base band, intermediate frequency or radio frequency.
4. method according to claim 1, is characterized in that, described compensation correction comprises:
Compensate in described multichannel transmitter and correct or compensate correction in the multichannel receiver corresponding to described multichannel transmitter.
5. a real-time calibration system for multichannel transmitter radio-frequency responsive, is characterized in that, is applied to wireless channel measurement, comprising:
Signal modulator, the initial test signal for being produced by multichannel transmitter is modulated into m road orthogonal test signals; Launch radio-frequency channel for m of the corresponding multichannel transmitter of described m road orthogonal test signals difference; Described modulation system comprises: binary phase shift keying modulator approach, or differential phase-shift keying (DPSK) modulator approach, or quarternary phase-shift keying (QPSK) modulator approach;
Receive path, for obtaining the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna; Wherein, comprise when obtaining the transmitting radio-frequency responsive signal of corresponding transmitting radio-frequency channel in each transmitting radio-frequency channel and the junction of transmitting antenna:
Utilize the mixer in a receive path to be integrated by each transmitting radio-frequency responsive signal launching radio-frequency channel, obtain each road radio-frequency responsive signal sum;
De-convolution operation device, the test signal received for utilizing each transmitting radio-frequency channel and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, obtain the response of each transmitting radio-frequency channel; Wherein, the test signal utilizing each transmitting radio-frequency channel to receive and the transmitting radio-frequency responsive signal of each transmitting radio-frequency channel carry out de-convolution operation, comprise when obtaining the response of each transmitting radio-frequency channel: utilize the orthogonal test signals of each transmitting radio-frequency channel as the deconvolution factor respectively, carry out deconvolution calculating with described each road radio-frequency responsive signal sum, obtain the response of each transmitting radio-frequency channel;
Compensation correction module, compensates correction for utilizing the transmitting radio-frequency responsive of response to each transmitting radio-frequency channel of each transmitting radio-frequency channel obtained.
6. system according to claim 5, is characterized in that:
Described signal modulator is quadrature modulator.
7. system according to claim 6, is characterized in that:
Described receive path comprises mixer; Described mixer comprises dual-frequency channel merger, tri-frequency combiner, four frequency combiners.
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| CN103905071B (en) * | 2012-12-26 | 2016-04-27 | 联想(北京)有限公司 | A kind of radio system anti-disturbance method and device, electronic equipment |
| CN106464393B (en) * | 2014-03-24 | 2019-04-12 | 华为技术有限公司 | Channel correcting device and method |
| CN105656815B (en) * | 2014-11-11 | 2019-01-25 | 华为技术有限公司 | A kind of bearing calibration of radio-frequency channel and device |
| CN104320176B (en) * | 2014-11-21 | 2017-08-29 | 中国电子科技集团公司第三十八研究所 | A kind of satellite communication system and its forward direction Calibration Method |
| CN104320177B (en) * | 2014-11-21 | 2017-11-24 | 中国电子科技集团公司第三十八研究所 | A kind of satellite communication system and its back Calibration Method |
| CN106470079B (en) * | 2015-08-21 | 2019-04-16 | 上海无线通信研究中心 | A kind of ultra wide band mimo channel measurement method and device |
| CN115514432B (en) * | 2022-09-14 | 2024-07-23 | 同济大学 | Low-complexity response calibration method for multi-input multi-output communication system |
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| CN1571549A (en) * | 2003-07-17 | 2005-01-26 | 华为技术有限公司 | An adjusting apparatus and method for array antenna send-receive channel |
| CN102014094A (en) * | 2009-09-07 | 2011-04-13 | 大唐移动通信设备有限公司 | Intelligent calibration method of antenna transmitting channel and antenna receiving channel and relevant device |
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