阅读说明：本技术 一种相位校准方法及装置 (A kind of phase alignment and device ) 是由 章勇 石璟 李庆华 倪立华 于 2018-05-17 设计创作，主要内容包括：本发明实施例提供了一种相位校准方法及装置,方法包括：按照预设规则对接收到的测量序列进行分段；分别确定分段后的各段测量序列的相位校准因子；其中所述各段测量序列分别对应有分段相位；当对待校验序列进行相位校准时,根据所述待校验序列的相位与各所述分段相位的匹配关系,采用匹配上的分段相位对应的相位校准因子对所述待校验序列进行相位校准。本发明实施例相当于将非线性的测量序列,分成几段近似线性的测量序列后,对各近似线性的测量序列分别采用相应的相位校准因子进行校准,能大大提升相位校准的精度,达到很好的相位校准效果。(The embodiment of the invention provides a kind of phase alignment and device, method includes: to be segmented according to preset rules to the measurement sequence received；The phase alignment factor of each section of measurement sequence after determining segmentation respectively；Wherein each section of measurement sequence has respectively corresponded segment phase；When treating verification sequence progress phase alignment, according to the matching relationship of the phase of the sequence to be verified and each segment phase, phase alignment is carried out using sequence to be verified described in the corresponding phase alignment factor pair of the segment phase matched.The embodiment of the present invention is equivalent to nonlinear measurement sequence, after being divided into the measurement sequence of several sections of approximately linears, the corresponding phase alignment factor is respectively adopted to the measurement sequence of each approximately linear to calibrate, the precision of phase alignment can be greatly promoted, reaches good phase alignment effect.)

1. a kind of phase alignment, which is characterized in that the described method includes:

The measurement sequence received is segmented according to preset rules；

The phase alignment factor of each section of measurement sequence after determining segmentation respectively；Wherein each section of measurement sequence has respectively corresponded Segment phase；

When treating verification sequence progress phase alignment, according to of the phase of the sequence to be verified and each segment phase With relationship, phase alignment is carried out using sequence to be verified described in the corresponding phase alignment factor pair of the segment phase matched.

2. the method according to claim 1, wherein it is described according to preset rules to the measurement sequence received into Row segmentation the step of include:

The measurement sequence received is segmented with greedy segmentation algorithm in frequency domain.

3. according to the method described in claim 2, it is characterized in that, the measurement sequence is with predeterminated frequency interval delta f generation Measurement sequence, the measurement sequence includes N number of frequency interval；Wherein, N is the natural number greater than 2；Each frequency interval A corresponding sampling point in received measurement sequence；

It is described the step of frequency domain is segmented the measurement sequence received with greedy segmentation algorithm, comprising:

First section length of first segment areal survey sequence in the measurement sequence received described in determination, wherein described first The initial value of section length is the maximum segment interval N of the measurement sequence_max, the maximum segment interval N_maxInclude at most N/ 2 frequency intervals；

Determine the phase slope k of the first segment areal survey sequence；

By the first phase place value b of the phase slope and the first segment areal survey sequence, first segment areal survey is determined The first phase matched curve of sequence:The wherein f_idxFor frequency interval index；

The first fit phase for determining each sampling point determined by the phase-fitting curve is segmented with the first segment and surveys Measure the difference of the actual phase of each sampling point of sequence；

If the difference is greater than preset difference value threshold value, the frequency interval quantity that first section length is included is reduced；

It repeats the above steps, until determining that difference is not more than the first section length N1 and the first phase of the preset difference value threshold value Position matched curve；

Using the N1 as the initial value of the second section length of second segment areal survey sequence in the measurement sequence, determine The difference of the second segment areal survey sequence is not more than the second section length N2 and second phase of the preset difference value threshold value Matched curve；

It repeats the above steps, the segmentation of measurement sequence received described in complete.

4. the method according to claim 1, wherein it is described according to preset rules to the measurement sequence received into Row segmentation the step of include:

It is boundary with center frequency point when the measurement sequence received is that symmetrical full bandwidth measures sequence, it will be described complete Bandwidth measurement sequence is divided into first band measurement sequence and second band measurement sequence；Wherein, the first band measures sequence It arranges symmetrical with the center frequency point with the phase slope of second band measurement sequence；

The first segmentation is carried out to first band measurement sequence with greedy segmentation algorithm in frequency domain；

The symmetric relation that the slope of sequence and second band measurement sequence is measured according to the first band, described second Frequency band measures in sequence using the second segmentation for corresponding to first segmentation.

5. the method according to claim 1, wherein it is described according to preset rules to the measurement sequence received Before the step of being segmented, further includes:

Measurement sequence is received by transmission channel；

When the signal-to-noise ratio of the transmission channel is less than default snr threshold, time-domain windowed is carried out to the measurement sequence received Noise suppression.

6. according to the method described in claim 3, it is characterized in that, the phase for determining each section of measurement sequence after segmentation respectively The step of position calibration factor, comprising:

According to default resolution ax f_resLinear fit is carried out to each section of measurement sequence respectively, obtains each section of measurement sequence The second fit phase as unit of the default resolution ratio of column；Wherein, the default resolution ax f_resLess than the frequency Interval delta f；

The corresponding phase alignment factor of each second fit phase is determined respectively.

7. a kind of phase alignment device, which is characterized in that described device includes:

Segmentation module, for being segmented according to preset rules to the measurement sequence received；

Phase alignment factor determining module, for determining the phase alignment factor of each section of measurement sequence after being segmented respectively；Wherein Each section of measurement sequence has respectively corresponded segment phase；

Phase alignment module, for when treat verification sequence carry out phase alignment when, according to the phase of the sequence to be verified with The matching relationship of each segment phase, using sequence to be verified described in the corresponding phase alignment factor pair of the segment phase matched Column carry out phase alignment.

8. device according to claim 7, which is characterized in that the segmentation module includes:

Subsection submodule, for being segmented with greedy segmentation algorithm to the measurement sequence received in frequency domain.

9. device according to claim 8, which is characterized in that the measurement sequence is with predeterminated frequency interval delta f generation Measurement sequence, the measurement sequence includes N number of frequency interval；Wherein, N is the natural number greater than 2；Each frequency interval A corresponding sampling point in received measurement sequence；The subsection submodule includes:

First section length determination unit, the of first segment areal survey sequence in the measurement sequence for being received described in determination One section length, wherein the initial value of first section length is the maximum segment interval N of the measurement sequence_max, described Maximum segment interval N_maxInclude at most N/2 frequency interval；

Phase slope determination unit, for determining the phase slope k of the first segment areal survey sequence；

First phase matched curve determination unit, for by the phase slope and the first segment areal survey sequence just Phase value b determines the first phase matched curve of first segment areal survey sequence:The wherein f_idx For frequency interval index；

Difference value determining unit, for determining the first fit phase of each sampling point determined by the phase-fitting curve, With the difference of the actual phase of each sampling point of the first segment areal survey sequence；

First section length adjustment unit reduces first section length if being greater than preset difference value threshold value for the difference The frequency interval quantity for being included；

First areal survey sequence determination unit, for repeating the execution step of above-mentioned each unit, until determining that difference is little In the first section length N1 of the preset difference value threshold value and first phase matched curve；

Second areal survey sequence determination unit, for using the N1 as second segment areal survey sequence in the measurement sequence The second section length initial value, determine the difference of the second segment areal survey sequence no more than the preset difference value threshold Second section length N2 of value and second phase matched curve；

Sequence segment determination unit is measured, for repeating the execution step of above-mentioned each unit, the survey that receives described in complete Measure the segmentation of sequence.

10. device according to claim 7, which is characterized in that the segmentation module includes:

Measure sequence divide submodule, for when the measurement sequence received be symmetrical full bandwidth measure sequence when, with Center frequency point is boundary, and full bandwidth measurement sequence is divided into first band measurement sequence and second band measures sequence； Wherein, the phase slope of the first band measurement sequence and second band measurement sequence is symmetrical with the center frequency point；

First subsection submodule, for carrying out first point to first band measurement sequence with greedy segmentation algorithm in frequency domain Section；

Second subsection submodule, for measuring sequence and the slope of second band measurement sequence according to the first band Symmetric relation, using the second segmentation for corresponding to first segmentation in second band measurement sequence.

11. device according to claim 7, which is characterized in that further include:

Receiving module, for receiving measurement sequence by transmission channel；

Time-domain windowed noise suppression module, for when the signal-to-noise ratio of the transmission channel is less than default snr threshold, to receiving Measurement sequence carry out time-domain windowed noise suppression.

12. device according to claim 7, which is characterized in that the phase alignment factor determining module includes:

Second fit phase determines submodule, for according to default resolution ax f_resEach section of measurement sequence is carried out respectively Linear fit obtains the second fit phase as unit of the default resolution ratio of each section of measurement sequence；Wherein, described Default resolution ax f_resLess than the frequency interval Δ f；

The phase alignment factor determines submodule, for determining the corresponding phase alignment factor of each second fit phase respectively.

Technical field

The present invention relates to signal processing technology fields, more particularly to a kind of phase alignment and device.

Background technique

In the communications field, due to the performance reason of analog device or transmission network, receiving end receives signal or transmitting terminal hair It usually there will be phase error when signal out, therefore, it is necessary to carry out phase alignment to transmitting terminal or receiving end.

For carrying out phase alignment to receiving end, method in the prior art is: 1, in frequency domain full bandwidth, with frequency Interval delta f generates the measurement sequence that length is N number of frequency interval；2, measurement sequence is transferred to receiving end；3, receiving end receives Channel estimation is carried out after to measurement sequence, obtains the frequency response Hest (i), i=0,1 ... of channel, N-1, Hest (i) are indicated The amplitude and phase of the corresponding sampling point in measurement sequence of i-th of frequency interval；4, the phase of each sampling point is taken out from Hest (i) Afterwards, a: can be by N₁(0<N₁< N) a phase carries out linear fit and obtains the initial phase of measurement sequence；B: survey can be calculated Phase difference of the sequence between each frequency interval is measured, is averaged to whole phase differences in full bandwidth, measurement sequence is obtained and exists The average phase-difference of full bandwidth；5, according to initial phase and average phase-difference, linear fit is carried out to full bandwidth, obtains full bandwidth On fit phase；6, it is tabled look-up according to fit phase, obtains the phase alignment factor in full bandwidth；7, phase school is carried out It is quasi-.

However, those skilled in the art have found during studying above-mentioned technical proposal, above-mentioned technical proposal exists such as Lower defect: due to analog device or transmission network as receiving end or transmitting terminal phase-frequency characteristic it is undesirable, even if only sending out One section of measurement sequence is sent or received, cannot guarantee that the measurement sequence is full linear phase in full bandwidth, that is to say, that whole In a frequency range, the corresponding phase difference for measuring sequence in each band frequency interval may have relatively big difference, in the prior art to full band Entire frequency range phase in width only carries out once linear fitting, when carrying out phase alignment, is obtained using the unified fitting of full bandwidth The phase alignment factor can cause biggish error, cannot obtain good phase alignment effect.

Summary of the invention

In view of the above problems, a kind of phase alignment i.e. device of the embodiment of the present invention is proposed, to solve or portion Decompose error big problem when determining phase alignment.

According to the first aspect of the invention, a kind of phase alignment is provided, which comprises

The measurement sequence received is segmented according to preset rules.

The phase alignment factor of each section of measurement sequence after determining segmentation respectively；Wherein each section of measurement sequence is right respectively There should be segment phase.

When treating verification sequence progress phase alignment, according to the phase of the sequence to be verified and each segment phase Matching relationship, using sequence to be verified described in the corresponding phase alignment factor pair of the segment phase matched carry out phase school It is quasi-.

According to the second aspect of the invention, a kind of phase alignment device is provided, described device includes:

Segmentation module, for being segmented according to preset rules to the measurement sequence received.

Phase alignment factor determining module, for determining the phase alignment factor of each section of measurement sequence after being segmented respectively； Wherein each section of measurement sequence has respectively corresponded segment phase.

Phase alignment module, for when treat verification sequence carry out phase alignment when, according to the phase of the sequence to be verified Position and each segment phase matching relationship, using described in the corresponding phase alignment factor pair of the segment phase matched to school It tests sequence and carries out phase alignment.

The embodiment of the present invention includes following advantages: the embodiment of the present invention to the measurement sequence received according to preset rules into Go segmentation, since the measurement sequence length after segmentation is shorter, phase approximately linear in each segmentation, therefore segmentation is determined respectively After the phase alignment factor of each section of measurement sequence afterwards, the phase alignment factor for measuring sequence according to each section is completed to corresponding each The phase alignment of section measurement sequence, it is right after being equivalent to the measurement sequence that nonlinear measurement sequence is divided into several sections of approximately linears The measurement sequence of each approximately linear is respectively adopted the corresponding phase alignment factor and is calibrated, and can greatly promote the essence of phase alignment Degree, reaches good phase alignment effect.

The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention, And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can It is clearer and more comprehensible, the followings are specific embodiments of the present invention.

Detailed description of the invention

By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:

Fig. 1 is a kind of flow chart of phase alignment provided in an embodiment of the present invention；

Fig. 2 is a kind of specific flow chart of phase alignment provided in an embodiment of the present invention；

Fig. 3 is a kind of block diagram of phase alignment device provided in an embodiment of the present invention；

Fig. 4 is a kind of specific block diagram of phase alignment device provided in an embodiment of the present invention.

Specific embodiment

In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real Applying mode, the present invention is described in further detail.

It should be appreciated that described herein, specific examples are only used to explain the present invention, and only present invention a part is real Example is applied, instead of all the embodiments, is not intended to limit the present invention.