CN110351165A - A kind of measurement method and system that digital array receiving channel group delay rises and falls - Google Patents
A kind of measurement method and system that digital array receiving channel group delay rises and falls Download PDFInfo
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Abstract
The invention discloses measurement methods and system that a kind of digital array receiving channel group delay rises and falls, belong to digital array TTC&T Technology field, comprising the following steps: S1: receiving wideband correlation；S2: multichannel baseband I/Q data is obtained；S3: the segment phase of each receiving channel is obtained；S4: the group delay data of each receiving channel is obtained；S5: the group delay fluctuating data of each receiving channel is obtained.The present invention can directly measure the fluctuating of total group delay containing the digital array receiving channel including frequency conversion receiving channel and ADC, and test result has more directive significance；Using embedded measurement method, without disconnecting link and draw additional test port, can on-line measurement at any time go out group delay fluctuating index；The group delay fluctuating index of all receiving channels of digital array can be measured simultaneously, and testing efficiency is high；Measured group delay fluctuating data is obtained by multi-point fitting, and measurement accuracy is high.
Description
Technical field
The present invention relates to digital array TTC&T Technology fields, and in particular to a kind of digital array receiving channel group delay
The measurement method and system of fluctuating.
Background technique
Phase (phase shift) of the group delay, that is, system at certain frequency transmits system for describing signal for the change rate of frequency
The physical quantity of the phase-frequency characteristic of system is one of important performance indexes of signal transmission system.The group delay of desired transmission system is
Constant, however due to the influence of the factors such as filter, amplifier and impedance matching network in real system, in frequency band at each frequency point
Group delay can be inconsistent, that is, generate fluctuate, showed in broadband system particularly evident.Group delay fluctuating index is directly determined
Determine distortion level of the signal Jing Guo Transmission system, is of great significance to the performance indicator of entire Transmission system.
Traditional measurement mode to group delay fluctuating index is using high-end instrument as vector network analyzer, to two
Port is tested analog network and is directly measured.But the following limitations exist for this method: firstly, can not directly measure as number
Mixed analog digital system as array received channel (from antenna to ADC base band data) rises and falls with interior group delay；Secondly, it is difficult to
Directly measure rising and falling with interior group delay for frequency conversion system；Finally, testing efficiency is low, can not measure simultaneously with thousands of channels
Large-scale digital array group delay rise and fall.
In view of this situation, it is necessary to for extensive frequency conversion and modulus mixed stocker as digital array receiving channel
System, new group delay fluctuating measurement method is developed on numeric field, solves the test problem of current group delay fluctuating index.For
This, proposes a kind of measurement method and system that digital array receiving channel group delay rises and falls.
Summary of the invention
Technical problem to be solved by the present invention lies in: the test for how better solving current group delay fluctuating index is difficult
Topic provides a kind of measurement method that digital array receiving channel group delay rises and falls.
The present invention be by the following technical programs solution above-mentioned technical problem, the present invention the following steps are included:
S1: wideband correlation is received
It receives calibration source and generates wideband correlation, digital array receiving channel is fed by coupling network；
S2: multichannel baseband I/Q data is obtained
Digital array receiving channel amplifies to the wideband correlation, filters and digitizes pretreatment, is formed
Multichannel baseband I/Q data；
S3: the segment phase of each receiving channel is obtained
Multichannel baseband I/Q data is truncated and is segmented, the segment phase of each receiving channel is obtained；
S4: the group delay data of each receiving channel is obtained
The segment phase of each receiving channel and its ideal segment phase are subtracted each other, the segmentation of each receiving channel is obtained
Phase difference changes with time relationship, then obtains the segmentation slope of each receiving channel by straight line fitting, to obtain each
Group delay data of the receiving channel relative to ideal wideband correlation, this method can be measured directly to be received containing frequency conversion
Total group delay of digital array receiving channel including channel and ADC rises and falls, and test result has more directive significance；
S5: the group delay fluctuating data of each receiving channel is obtained
Each receiving channel group delay data obtained in step S4 is deducted to the background delay data for receiving calibration source, is obtained
To the difference of each receiving channel group delay data and background delay data, and after reducing the arithmetic equal value of all differences, finally
Obtain the group delay fluctuating data of each receiving channel of digital array.
Preferably, in the step S3, it is risen and fallen according to group delay and is counted required for measurement work by multichannel baseband I/Q
Data are uniformly divided into multistage.
Preferably, in the step S4, the opposite group with ideal wideband correlation of each receiving channel is obtained
The process of delay data the following steps are included:
S41: the segment phase of each receiving channel, phase expression formula are calculated are as follows:
Wherein, n is digital array receiving channel number (n=1,2,3 ..., N), and N is total receiving channel number, and k is fragment number
(k=1,2,3..., K), K are total number of segment, and B is the bandwidth of wideband correlation, and t is the time, and T is wide-band LFM letter
Number pulsewidth, tnkFor the time delay of k-th of frequency sub-band of n-th of receiving channel, φnInitial phase for n-th of receiving channel is inclined
Difference；
S42: the ideal segment phase of each receiving channel, phase expression formula are calculated are as follows:
Wherein, tnFor initial delay of the reception signal relative to ideal signal of n-th of receiving channel；
S43: the ideal segment phase phase that will be calculated in the segment phase being calculated in step S41 and step S42
Subtract, obtain each sub-band signals of each receiving channel and the phase difference of ideal signal, expression formula are as follows:
S44: due to phase difference φnk(t) in a linear relationship with time t, straight line y=ax+b fitting is carried out to it, is obtained
Slope a, then haveSo that the time delay for k-th of frequency sub-band for obtaining n-th of receiving channel isGroup delay data of each receiving channel relative to ideal wideband correlation is obtained, it is measured
Group delay data be to be obtained by multi-point fitting, measurement accuracy is high.
Preferably, in the step S5, the expression formula of the group delay fluctuating data of each receiving channel of digital array are as follows:
Wherein, gtnkFor the group delay fluctuating data of k-th of frequency sub-band of n-th of receiving channel, t 'kTo receive calibration source
The background delay data of k-th of frequency sub-band, the group delay that this method can measure all receiving channels of digital array simultaneously rise
Index is lied prostrate, testing efficiency is high.
Preferably, in the step S5, background delay data is using reference receiver to generation wide-band LFM
Itself group delay fluctuating of the reception calibration source of signal is demarcated and is obtained.
The present invention also provides the measuring systems that a kind of digital array receiving channel group delay rises and falls, including receive calibration source
Generation module, baseband I/Q data, which obtain module, segment phase obtains module, group delay obtains module, group delay rises and falls obtains mould
Block and control module；
The reception calibration source generation module is sent to the baseband I/Q data for generating wideband correlation
Obtain module；
The baseband I/Q data obtains module, for acquiring the multichannel wideband correlation for passing through coupling network, into
Multichannel baseband I/Q data is formed after row amplification, filtering and digitlization pretreatment；
The segment phase obtains module, for multichannel baseband I/Q data to be truncated and is segmented, obtains each reception
The segment phase in channel；
The group delay obtains module, for the segment phase of each receiving channel and ideal segment phase to be subtracted each other,
The segment phase difference for obtaining each receiving channel changes with time relationship, then obtains each receiving channel by straight line fitting
It is segmented slope, thus obtains group delay data of the multipath reception channel relative to ideal wideband correlation；
The group delay, which rises and falls, obtains module, for each receiving channel group delay data to be deducted to the sheet for receiving calibration source
Bottom delay data obtains the difference of each receiving channel group delay data and background delay data, and reduces the calculation of all differences
After art mean value, the group delay fluctuating data of each receiving channel of digital array is finally obtained；
The control module is instructed for issuing to other modules, completes relevant action；
The reception calibration source generation module, baseband I/Q data obtain module, segment phase obtains module, group delay obtains
Modulus block, group delay fluctuating obtain module and are electrically connected with control module.
Preferably, the clock reference for receiving calibration source generation module and baseband I/Q data obtain the clock base of module
It is plesiochronous.
Preferably, it is digital array receiving channel that the baseband I/Q data, which obtains the hardware carrier of module,.
Preferably, the digital array receiving channel includes amplifier, frequency mixer, filter, analog-digital converter and number
Down-converter unit, wideband correlation is by successively by the amplifier, frequency mixer, the filter, described
Analog-digital converter and the Digital Down Convert cell translation are baseband I/Q data.
The present invention has the advantage that the measurement method that the digital array receiving channel group delay rises and falls compared with prior art
And system, it can directly measure total group delay containing the digital array receiving channel including frequency conversion receiving channel and ADC and rise and fall,
Test result has more directive significance；Using embedded measurement method, without disconnecting link and additional test port is drawn, it can
Go out group delay fluctuating index with on-line measurement at any time；The group delay that all receiving channels of digital array can be measured simultaneously rises and falls
Index, testing efficiency are high；Measured group delay fluctuating data is obtained by multi-point fitting, and measurement accuracy is high；Due to group
Time delay fluctuating is unrelated with the first phase between receiving channel, then amplitude-phase consistency bring influences between eliminating receiving channel, is worth quilt
It promotes the use of.
Detailed description of the invention
Fig. 1 is overall procedure schematic diagram of the invention；
Fig. 2 is the implementation process diagram of measurement method in the embodiment of the present invention two；
Fig. 3 is the group delay oscillating curves of digital array receiving channel in the embodiment of the present invention two.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment one
As shown in Figure 1, the present embodiment provides a kind of technical solutions: a kind of survey that digital array receiving channel group delay rises and falls
Amount method, comprising the following steps:
S1: wideband correlation is received
It receives calibration source and generates wideband correlation, digital array receiving channel is fed by coupling network, this
Sample can transmit wideband correlation by digital array receiving channel；
S2: multichannel baseband I/Q data is obtained
Digital array receiving channel amplifies to the wideband correlation, filters and digitizes pretreatment, is formed
Multichannel baseband I/Q data, the baseband I/Q data are in amplifier, frequency mixer, filter, analog-digital converter and Digital Down Convert
It is formed under the action of the devices such as unit；
S3: the segment phase of each receiving channel is obtained
Multichannel baseband I/Q data is truncated and is segmented, the segment phase of each receiving channel is obtained；
S4: the group delay data of each receiving channel is obtained
The segment phase of each receiving channel and its ideal segment phase are subtracted each other, the segmentation of each receiving channel is obtained
Phase difference changes with time relationship, then obtains the segmentation slope of each receiving channel by straight line fitting, to obtain each
Group delay data of the receiving channel relative to ideal wideband correlation, this method can be measured directly to be received containing frequency conversion
Total group delay of digital array receiving channel including channel and ADC rises and falls, and test result has more directive significance；
It includes following for obtaining the opposite process with the group delay data of ideal wideband correlation of each receiving channel
Step:
S41: the segment phase of each receiving channel, phase expression formula are calculated are as follows:
Wherein, n is digital array receiving channel number (n=1,2,3 ..., N), and N is total receiving channel number, and k is fragment number
(k=1,2,3..., K), K are total number of segment, and B is the bandwidth of wideband correlation, and t is the time, and T is wide-band LFM letter
Number pulsewidth, tnkFor the time delay of k-th of frequency sub-band of n-th of receiving channel, φnInitial phase for n-th of receiving channel is inclined
Difference；
S42: the ideal segment phase of each receiving channel, phase expression formula are calculated are as follows:
Wherein, tnFor initial delay of the reception signal relative to ideal signal of n-th of receiving channel；
S43: the ideal segment phase phase that will be calculated in the segment phase being calculated in step S41 and step S42
Subtract, obtain each sub-band signals of each receiving channel and the phase difference of ideal signal, expression formula are as follows:
S44: due to phase difference φnk(t) in a linear relationship with time t, straight line y=ax+b fitting is carried out to it, is obtained
Slope a, then haveSo that the time delay for k-th of frequency sub-band for obtaining n-th of receiving channel isGroup delay data of each receiving channel relative to ideal wideband correlation is obtained, it is measured
Group delay data be to be obtained by multi-point fitting, measurement accuracy is high.
S5: the group delay fluctuating data of each receiving channel is obtained
Each receiving channel group delay data obtained in step S4 is deducted to the background delay data for receiving calibration source, is obtained
To the difference of each receiving channel group delay data and background delay data, and after reducing the arithmetic equal value of all differences, finally
The group delay fluctuating data of each receiving channel of digital array is obtained, which is expressed as calculating relative to all differences
The fluctuating of art mean value, this method can measure the group delay fluctuating index of all receiving channels of digital array, test effect simultaneously
Rate is high.
In the step S3, being risen and fallen according to group delay, it is equal by multichannel baseband I/Q data to count required for measurement work
It is even to be divided into multistage.
In the step S5, the expression formula of the group delay fluctuating data of each receiving channel of digital array are as follows:
Wherein, gtnkFor the group delay fluctuating data of k-th of frequency sub-band of n-th of receiving channel, t 'kTo receive calibration source
The background delay data of k-th of frequency sub-band.
In the step S5, background delay data is to be connect using reference receiver to wideband correlation is generated
Itself group delay fluctuating for receiving calibration source is demarcated and is obtained, and the group delay fluctuation characteristic of the reference receiver can be ignored.
The present embodiment additionally provides a kind of measuring system that digital array receiving channel group delay rises and falls, including receives correction
Source generation module, baseband I/Q data, which obtain module, segment phase obtains module, group delay obtains module, group delay rises and falls obtains
Module and control module；
The reception calibration source generation module is sent to the baseband I/Q data for generating wideband correlation
Obtain module；
The baseband I/Q data obtains module, for acquiring the multichannel wideband correlation for passing through coupling network, into
Multichannel baseband I/Q data is formed after row amplification, filtering and digitlization pretreatment；
The segment phase obtains module, for multichannel baseband I/Q data to be truncated and is segmented, obtains each reception
The segment phase in channel；
The group delay obtains module, for the segment phase of each receiving channel and ideal segment phase to be subtracted each other,
The segment phase difference for obtaining each receiving channel changes with time relationship, then obtains each receiving channel by straight line fitting
It is segmented slope, thus obtains group delay data of the multipath reception channel relative to ideal wideband correlation；
The group delay, which rises and falls, obtains module, for group delay data to be deducted to the background delay data for receiving calibration source,
And after reducing the arithmetic equal value of data, the group delay fluctuating data of each receiving channel of digital array is finally obtained；
The control module is instructed for issuing to other modules, completes relevant action；
The reception calibration source generation module, baseband I/Q data obtain module, segment phase obtains module, group delay obtains
Modulus block, group delay fluctuating obtain module and are electrically connected with control module.
The clock reference for receiving calibration source generation module and baseband I/Q data obtain the clock reference synchronization of module.
The hardware carrier that the baseband I/Q data obtains module is digital array receiving channel.
The digital array receiving channel includes amplifier, frequency mixer, filter, analog-digital converter and Digital Down Convert list
The devices such as member, wideband correlation is by successively passing through the amplifier, the frequency mixer, the filter, the mould
The devices such as number converter and the Digital Down Convert unit are converted to baseband I/Q data.
Embodiment two
As Figure 2-3, the measurement that the present embodiment rises and falls for group delay in existing wideband digital array received channel
Problem proposes a kind of measuring system and method that digital array receiving channel group delay rises and falls, and the system and method are to be segmented
Wideband correlation carries out the measurement to rise and fall with interior group delay as test signal.
Phase for wideband correlation, between every cross-talk linear FM signal and ideal sub- linear FM signal
Potential difference slope be it is directly proportional to the delay inequality in the frequency sub-band, slope is gone out by straight line fitting, the available frequency sub-band with
Time delay between ideal sub-band signals.Recycle reference receiver to the reception calibration source for generating wideband correlation
The fluctuating of itself group delay is demarcated, and the background delay data for receiving calibration source is obtained.By frequency sub-band and ideal sub-band signals
Between delay inequality deduct background delay data after, the group delay fluctuating data of receiving channel can be obtained.
The measuring system that the digital array receiving channel group delay of the present embodiment rises and falls include receive calibration source generation module,
Baseband I/Q data, which obtains module, segment phase obtains module, group delay obtains module, group delay rises and falls obtains module and control
Module.
The reception calibration source generation module for generating wide band radio-frequency linear FM signal, as frequency range is 2200~
The linear FM signal that 2300MHz, bandwidth 100MHz, pulsewidth are 5ms.The baseband signal for receiving calibration source generation module can be with
It is generated by high speed, high-precision DDS (DAC) chip or arbitrary waveform generator, clock system and digital array receive system
The homologous coherent of clock.The phase accumulator precision of linear FM signal is 48bit.
The hardware carrier that baseband I/Q data obtains module is digital array receiving channel, test signal by coupling network,
After amplification, filtering, analog-to-digital conversion and Digital Down Convert, base band linear FM signal is exported.As exported -50~50MHz, pulsewidth
For the base band linear FM signal of 5ms, base band data rate is 120MSPS, and valid data points are 120*5*1000=600000.
Segment phase obtains module for multichannel baseband I/Q data to be truncated and is segmented, and obtains each receiving channel
Segment phase.Segments depends on needing measurement frequency resolution ratio to be achieved, such as carries out above-mentioned 600000 point data uniform
Segmentation, such as 100 sections, every segment data are 6000 points, calculate phase curve further according to baseband complex signal.Each section of phase curve is corresponding
Frequency range is [- 50MHz, -49MHz], and [- 49MHz, -48MHz] ..., [49MHz, 50MHz], i.e. measurement frequency resolution ratio is
1MHz。
Group delay obtains module for subtracting each other the segment phase of each receiving channel and ideal segment phase, obtains every
The segment phase difference of a receiving channel changes with time relationship, then oblique by the segmentation that straight line fitting obtains each receiving channel
Rate obtains group delay data of the multipath reception channel relative to ideal wideband correlation.Wherein preferably it is segmented phase
Position is the phase data of the piecewise linearity FM signal locally generated, is such as divided into the desired phase number of 100 sections, at 6000 points every section
According to.Straight line fitting can use least square method.
Group delay, which rises and falls, obtains the background delay data that module is used to deduct the group delay data reception calibration source, obtains
The difference of each receiving channel group delay data and background delay data, and after reducing the arithmetic equal value of all differences, final
To the group delay fluctuating data of each receiving channel of digital array.Above-mentioned group delay can be used in the background delay data for receiving calibration source
The method for obtaining module is directly sampled by reference receiver and receives the output signal of calibration source and obtain.Reference receiver can be by
Wide-band oscilloscope realizes that the fluctuating of its own group delay should be less than systematic error measurement accuracy.
As shown in Fig. 2, measuring system and the digital array receiving channel group of digital array receiving channel group delay fluctuating
The measurement method that time delay rises and falls, specific implementation process are as follows:
S1: receiving calibration source and generate wideband correlation, is fed into digital array by coupling network and respectively receives and leads to
Road；
S2: receiving channel forms multichannel after pretreatment is amplified, filtered and digitized to the wideband correlation
Baseband I/Q data；
S3: multichannel baseband I/Q data is truncated and is segmented, the segment phase of each receiving channel is obtained；
S4: the segment phase subtracts each other with ideal segment phase, obtains the segment phase difference of each receiving channel at any time
Variation relation, the segmentation slope of each receiving channel is obtained by straight line fitting, obtains multipath reception channel relative to ideal
The group delay data of wideband correlation；
Measuring principle is as follows:
The segment phase of each receiving channel is the sub- linear FM signal phase of segmentation of wideband correlation, phase
Position expression formula are as follows:
Wherein, n is digital array receiving channel number (n=1,2,3 ..., N), and N is total receiving channel number, and k is fragment number
(k=1,2,3..., K), K are total number of segment, and B is the bandwidth of wideband correlation, and t is the time, and T is wide-band LFM letter
Number pulsewidth, tnkFor the time delay of k-th of frequency sub-band of n-th of receiving channel, φnInitial phase for n-th of receiving channel is inclined
Difference；
The phase expression formula of ideal segment phase signal are as follows:
Wherein, tnFor initial delay of the reception signal relative to ideal signal of n-th of receiving channel；
The phase difference of each sub-band signals of each receiving channel and ideal segment phase signal are as follows:
Due to phase difference φnk(t) in a linear relationship with time t, straight line y=ax+b fitting is carried out to it, obtains slope
A then has
The time delay for obtaining k-th of frequency sub-band of n-th of receiving channel is
S5: the group delay data that step S4 is obtained deducts the background delay data for receiving calibration source, obtains each reception
The difference of channel group delay data and background delay data, and after reducing the arithmetic equal value of all differences, finally obtain Digital Arrays
Arrange the group delay fluctuating data of each receiving channel.
Measuring principle is as follows:
Digital array receiving channel is replaced using the negligible reference receiver of group delay fluctuation characteristic, reuses step
Same procedure in S4 calibrates the background delay data t ' for receiving k-th of frequency sub-band of calibration sourcek；By n-th receiving channel
The time delay of k-th of frequency sub-band deducts background delay data t 'k, obtain each receiving channel group delay data and background delay data
Difference, and after reducing the arithmetic equal value of all differences, finally obtain the group delay fluctuating data of n-th of receiving channel:
The present invention has deducted reception calibration source background by the straight line fitting to piecewise linearity FM signal phase difference
Group delay rise and fall, obtain higher measurement accuracy, and be easy to Project Realization.
As shown in figure 3, being the digital array receiving channel of the present embodiment, bandwidth 100MHz, frequency accuracy are 1MHz's
Group delay oscillating curves.Maximum group delay rises and falls as the group delay fluctuating data phase of analog filter in 1.4ns, with receiving channel
It coincide.
In conclusion measurement method that the digital array receiving channel group delay in above-mentioned two groups of embodiments rises and falls and being
System can directly measure total group delay containing the digital array receiving channel including frequency conversion receiving channel and ADC and rise and fall, test
As a result directive significance is had more；Using embedded measurement method, without disconnecting link and additional test port, Ke Yisui are drawn
When on-line measurement go out group delay fluctuating index；The group delay fluctuating that all receiving channels of digital array can be measured simultaneously refers to
Mark, testing efficiency are high；Measured group delay fluctuating data is obtained by multi-point fitting, and measurement accuracy is high；When due to group
The first phase prolonged between fluctuating and receiving channel is unrelated, then amplitude-phase consistency bring influences between eliminating receiving channel, is worth being pushed away
It is wide to use.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (9)
1. the measurement method that a kind of digital array receiving channel group delay rises and falls, which comprises the following steps:
S1: wideband correlation is received
It receives calibration source and generates wideband correlation, digital array receiving channel is fed by coupling network；
S2: multichannel baseband I/Q data is obtained
Digital array receiving channel amplifies to the wideband correlation, filters and digitizes pretreatment, forms multichannel
Baseband I/Q data；
S3: the segment phase of each receiving channel is obtained
Multichannel baseband I/Q data is truncated and is segmented, the segment phase of each receiving channel is obtained；
S4: the group delay data of each receiving channel is obtained
The segment phase of each receiving channel and its ideal segment phase are subtracted each other, the segment phase of each receiving channel is obtained
Difference changes with time relationship, then obtains the segmentation slope of each receiving channel by straight line fitting, to obtain each reception
Group delay data of the channel relative to ideal wideband correlation；
S5: the group delay fluctuating data of each receiving channel is obtained
Each receiving channel group delay data obtained in step S4 is deducted to the background delay data for receiving calibration source, is obtained each
The difference of a receiving channel group delay data and background delay data, and after reducing the arithmetic equal value of all differences, obtain number
The group delay fluctuating data of each receiving channel of array.
2. the measurement method that a kind of digital array receiving channel group delay according to claim 1 rises and falls, it is characterised in that:
In the step S3, multichannel baseband I/Q data is uniformly divided into more by the points required for measuring work that risen and fallen according to group delay
Section.
3. the measurement method that a kind of digital array receiving channel group delay according to claim 2 rises and falls, it is characterised in that:
In the step S4, the opposite process packet with the group delay data of ideal wideband correlation of each receiving channel is obtained
Include following steps:
S41: the segment phase of each receiving channel, phase expression formula are calculated are as follows:
Wherein, n is digital array receiving channel number (n=1,2,3 ..., N), and N is total receiving channel number, and k is fragment number (k=
1,2,3..., K), K is total number of segment, and B is the bandwidth of wideband correlation, and t is the time, and T is wideband correlation
Pulsewidth, tnkFor the time delay of k-th of frequency sub-band of n-th of receiving channel, φnFor the initial phase deviation of n-th of receiving channel；
S42: the ideal segment phase of each receiving channel, phase expression formula are calculated are as follows:
Wherein, tnFor initial delay of the reception signal relative to ideal signal of n-th of receiving channel；
S43: the ideal segment phase being calculated in the segment phase being calculated in step S41 and step S42 is subtracted each other, is obtained
To each sub-band signals of each receiving channel and the phase difference of ideal signal, expression formula are as follows:
S44: due to phase difference φnk(t) in a linear relationship with time t, straight line y=ax+b fitting is carried out to it, obtains slope
A then hasSo that the time delay for k-th of frequency sub-band for obtaining n-th of receiving channel is
Obtain group delay data of each receiving channel relative to ideal wideband correlation.
4. the measurement method that a kind of digital array receiving channel group delay according to claim 3 rises and falls, it is characterised in that:
In the step S5, the expression formula of the group delay fluctuating data of each receiving channel of digital array are as follows:
Wherein, gtnkFor the group delay fluctuating data of k-th of frequency sub-band of n-th of receiving channel, t 'kTo receive k-th of calibration source
The background delay data of frequency sub-band.
5. the measurement method that a kind of digital array receiving channel group delay according to claim 4 rises and falls, it is characterised in that:
In the step S5, background delay data is using reference receiver to the reception calibration source for generating wideband correlation
Itself group delay fluctuating demarcated and obtained.
6. the measuring system that a kind of digital array receiving channel group delay rises and falls, it is characterised in that: appointed using such as claim 1-5
Measurement method described in one carries out the measurement work that digital array receiving channel group delay rises and falls, including receives calibration source and generate
Module, baseband I/Q data obtain module, segment phase obtains module, group delay obtains module, group delay rises and falls obtain module with
Control module；
The reception calibration source generation module is sent to the baseband I/Q data and obtains for generating wideband correlation
Module；
The baseband I/Q data obtains module, for acquiring the multichannel wideband correlation for passing through coupling network, is put
Greatly, multichannel baseband I/Q data is formed after filtering and digitizing pretreatment；
The segment phase obtains module, for multichannel baseband I/Q data to be truncated and is segmented, obtains each receiving channel
Segment phase；
The group delay obtains module and obtains for subtracting each other the segment phase of each receiving channel and ideal segment phase
The segment phase difference of each receiving channel changes with time relationship, then obtains the segmentation of each receiving channel by straight line fitting
Thus slope obtains group delay data of the multipath reception channel relative to ideal wideband correlation；
The group delay, which rises and falls, obtains module, when for each receiving channel group delay data to be deducted the background for receiving calibration source
Prolong data, obtains the difference of each receiving channel group delay data and background delay data, and the arithmetic for reducing all differences is equal
After value, the group delay fluctuating data of each receiving channel of digital array is finally obtained；
The control module is instructed for issuing to other modules, completes relevant action；
The reception calibration source generation module, baseband I/Q data obtain module, segment phase obtains module, group delay obtains mould
Block, group delay fluctuating obtain module and are electrically connected with control module.
7. the measuring system that a kind of digital array receiving channel group delay according to claim 6 rises and falls, it is characterised in that:
The clock reference for receiving calibration source generation module and baseband I/Q data obtain the clock reference synchronization of module.
8. the measuring system that a kind of digital array receiving channel group delay according to claim 6 rises and falls, it is characterised in that:
The hardware carrier that the baseband I/Q data obtains module is digital array receiving channel.
9. the measuring system that a kind of digital array receiving channel group delay according to claim 8 rises and falls, it is characterised in that:
The digital array receiving channel includes amplifier, frequency mixer, filter, analog-digital converter and Digital Down Convert unit, broadband
Linear FM signal by successively by the amplifier, the frequency mixer, the filter, the analog-digital converter with it is described
Digital Down Convert cell translation is baseband I/Q data.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114828195A (en) * | 2021-01-18 | 2022-07-29 | 大唐移动通信设备有限公司 | Signal processing method and device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594767A (en) * | 2013-11-23 | 2014-02-19 | 中国电子科技集团公司第三十八研究所 | Integrated cavity filter |
| CN104168234A (en) * | 2013-05-16 | 2014-11-26 | 中兴通讯股份有限公司 | Signal cancelling method and apparatus of wireless communication system |
| CN104363004A (en) * | 2014-11-14 | 2015-02-18 | 肖飞 | Filter direct synthetic method |
| CN104375132A (en) * | 2014-11-28 | 2015-02-25 | 中国电子科技集团公司第三十八研究所 | Measuring equipment and method of relative delays of multiple analog channels of digital array radar |
| CN105242243A (en) * | 2015-09-29 | 2016-01-13 | 河海大学 | Broadband receiving digital waveform formation method based on dechirp processing and two-time time delays |
| CN105721078A (en) * | 2016-03-21 | 2016-06-29 | 中国空间技术研究院 | Automatic test method for general group delay ripple |
| CN108051785A (en) * | 2017-11-24 | 2018-05-18 | 电子科技大学 | The optimum design method of wideband digital array radar receiving channel |
| US10110318B2 (en) * | 2015-02-19 | 2018-10-23 | Elenion Technologies, Llc | Optical delay lines for electrical skew compensation |
-
2019
- 2019-07-22 CN CN201910662002.XA patent/CN110351165A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168234A (en) * | 2013-05-16 | 2014-11-26 | 中兴通讯股份有限公司 | Signal cancelling method and apparatus of wireless communication system |
| CN103594767A (en) * | 2013-11-23 | 2014-02-19 | 中国电子科技集团公司第三十八研究所 | Integrated cavity filter |
| CN104363004A (en) * | 2014-11-14 | 2015-02-18 | 肖飞 | Filter direct synthetic method |
| CN104375132A (en) * | 2014-11-28 | 2015-02-25 | 中国电子科技集团公司第三十八研究所 | Measuring equipment and method of relative delays of multiple analog channels of digital array radar |
| US10110318B2 (en) * | 2015-02-19 | 2018-10-23 | Elenion Technologies, Llc | Optical delay lines for electrical skew compensation |
| CN105242243A (en) * | 2015-09-29 | 2016-01-13 | 河海大学 | Broadband receiving digital waveform formation method based on dechirp processing and two-time time delays |
| CN105721078A (en) * | 2016-03-21 | 2016-06-29 | 中国空间技术研究院 | Automatic test method for general group delay ripple |
| CN108051785A (en) * | 2017-11-24 | 2018-05-18 | 电子科技大学 | The optimum design method of wideband digital array radar receiving channel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114828195A (en) * | 2021-01-18 | 2022-07-29 | 大唐移动通信设备有限公司 | Signal processing method and device |
| CN114828195B (en) * | 2021-01-18 | 2024-02-13 | 大唐移动通信设备有限公司 | Signal processing method and device |
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