CN106126478A - A kind of signal phase arithmetic average error cancelling method - Google Patents
A kind of signal phase arithmetic average error cancelling method Download PDFInfo
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- CN106126478A CN106126478A CN201610524389.9A CN201610524389A CN106126478A CN 106126478 A CN106126478 A CN 106126478A CN 201610524389 A CN201610524389 A CN 201610524389A CN 106126478 A CN106126478 A CN 106126478A
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Abstract
The invention discloses a kind of signal phase arithmetic average error cancelling method, comprise the following steps: respectively phase place is asked sin value and cos value；Ask meansigma methods and the arithmetic average of above-mentioned cos value of above-mentioned sin value respectively；Meansigma methods and the arithmetic average of cos value according to sin value seek phase value.
Description
Technical field
The present invention relates to signal processing method field, be specifically related to a kind of signal phase arithmetic average error concealment side
Method.
Background technology
In signal processing field, there is the phase information being many times required for obtaining signal.In some Project Realization, as
The scope using FPGA to calculate the phase information value that atan (q/i) obtains signal is [-pi ~+pi], and such phase value may go out
One saltus step of existing-pi to+pi, some value of result directly calculating arithmetic mean is exactly a wrong result, the most not
Some errors can be eliminated by statistical mode.Such as, as shown in Figure 1, it is known that the phase value of vector a is+pi, vector b
Phase value is-3/4*Pi, if two values directly are added to average is exactly: (1+(-3/4)) * pi/2=1/8*pi, i.e.
C shown in Fig. 1, if the method is used in signal phase value and eliminates in shake, just obtains a wrong result, the error obtained
Greatly.
Summary of the invention
The present invention is to solve that above-mentioned technical problem provides a kind of work signal phase arithmetic average error cancelling method.
The present invention is achieved through the following technical solutions:
A kind of signal phase arithmetic average error cancelling method, comprises the following steps:
Respectively phase place is asked sin value and cos value；
Ask meansigma methods and the arithmetic average of above-mentioned cos value of above-mentioned sin value respectively；
Meansigma methods and the arithmetic average of cos value according to sin value seek phase value.
Phase value is converted to triangular domain by the method for this programme, passes through ATAN(q/ after triangular domain finishes arithmetic mean again
I) obtaining the arithmetic average of signal phase, it can effectively eliminate error, because SIN function sin and cosine function cos exists
Value between [-2pi ~+2pi] is to there is not saltus step continuously.
Also include the processing method to input signal, the treating method comprises acquisition input signal, and to input signal
It is normalized pi process by a certain value.
Described a certain value is any value in 25736,25735,25734.
The present invention compared with prior art, at least has such advantages as and beneficial effect:
This programme just phase value is converted to triangular domain, passes through ATAN(q/i after triangular domain finishes arithmetic mean again) obtain letter
The arithmetic average of number phase place, it can effectively eliminate error.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes of the application
Point, it is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the vectogram of the embodiment of the present invention 1.
Fig. 2 is the simulation result figure of the embodiment of the present invention 2.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As shown in Figure 1, it is known that the phase value of vector a is+pi, the phase value of vector b is-3/4 × Pi.First phase place is taken delta value
After average.Cos(pi)=-1, cos (-3/4*pi)=-0.7071, cos value is averaged and is-0.8536；sin
(pi)=0, sin(-3/4*pi)=-0.7071, sin value is averaged it is-0.3535.I.e. signal d(-0.8536 ,-
0.3535) phase value, to d is asked to can be obtained by vector a and the arithmetic average of vector b phase value then.
Embodiment 2
Using modesim+Debussy emulation, result is as in figure 2 it is shown, the first row and the second row are input signal, and the third line is
PhaseVid signal, fourth line is PhaseDat signal, and fifth line is PhaseDat_cos signal, the 6th behavior PhaseDat_
Sin signal, the 7th behavior PhaseVid_cos_sin signal, the 8th behavior PhaseDat_avage_cos signal, the 9th behavior
PhaseDat_avage_sin signal, the tenth behavior PhaseVid_avage signal, the 11st behavior PhaseDat_avage letter
Number.In emulation, phase data figure place is 16bit, and wherein 3bit represents integer, i.e. 011.0010010001000=3.141=pi, because of
For Binary Zero 110010010001000 equal to decimal scale 25736, so phase place uses 25736 normalization pi in this analogous diagram；
The difference of the calculating according to binary marks, it is possible to according to 25735 or 25734 normalization pi.
Amplitude data figure place is 16bit, and wherein 2bit represents integer, i.e. 01.00000000000000=1, because two enter
System 0100000000000000 is equal to decimal scale 16384, so amplitude uses 16384 normalization 1 in this analogous diagram.
Input signal phase value is respectively 20000 and-21999 as shown in Figure 2, and input signal phase place is returned by 25736 respectively
One change pi, it is known that input signal phase place 20000 be 0.7771*pi ,-21999 be-0.8548*pi, signal phase value in analogous diagram
PhaseDat is effective when PhaseVid is high；If it is exactly-999.5 i.e.-0.0388* that signal is directly asked arithmetic mean result
Pi, this result is a result for mistake, and error is big.Respectively input phase value is asked range value result that cos obtains for being respectively-
12528 and-14709, equally, range value PhaseDat_cos is effective when PhaseVid_cos_sin is high；Input signal phase
Position asks the meansigma methods of the range value of cos for (-12528-14709)/2=-13619, and the range value that input phase value asks sin is
Being respectively 10557 and-7214, input signal phase place asks the meansigma methods of the range value of sin to be 1671, finally by mean value calculation
Atan(-13619/1671)=24736=0.9661pi, this value is the correct phase of input signal 0.7771pi and-0.8548pi
Position average resulting value.
Concrete in signal phase value eliminates shake, utilize the method for this programme can effectively eliminate this error.
Upper described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail
Describe in detail bright, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in
Within protection scope of the present invention.
Claims (3)
1. a signal phase arithmetic average error cancelling method, it is characterised in that comprise the following steps:
Respectively phase place is asked sin value and cos value；
Ask meansigma methods and the arithmetic average of above-mentioned cos value of above-mentioned sin value respectively；
Meansigma methods and the arithmetic average of cos value according to sin value seek phase value.
A kind of signal phase arithmetic average error cancelling method the most according to claim 1, it is characterised in that: also include
Processing method to input signal, the treating method comprises acquisition input signal, and returns input signal by a certain value
One changes pi process.
A kind of signal phase arithmetic average error cancelling method the most according to claim 2, it is characterised in that: described certain
One value is any value in 25736,25735,25734.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109309501A (en) * | 2018-09-12 | 2019-02-05 | 成都宝通天宇电子科技有限公司 | Polycyclic data compression method in high precision |
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| CN1691657A (en) * | 2004-01-19 | 2005-11-02 | 三星电子株式会社 | Apparatus and method for carrier acquisition of vestigial sideband (vsb) signal |
| CN101483624A (en) * | 2009-02-10 | 2009-07-15 | 东南大学 | Compensation apparatus and compensation method for frequency drift in MSK differential detection and demodulation circuit |
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Patent Citations (2)
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| CN1691657A (en) * | 2004-01-19 | 2005-11-02 | 三星电子株式会社 | Apparatus and method for carrier acquisition of vestigial sideband (vsb) signal |
| CN101483624A (en) * | 2009-02-10 | 2009-07-15 | 东南大学 | Compensation apparatus and compensation method for frequency drift in MSK differential detection and demodulation circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109309501A (en) * | 2018-09-12 | 2019-02-05 | 成都宝通天宇电子科技有限公司 | Polycyclic data compression method in high precision |
| CN109309501B (en) * | 2018-09-12 | 2022-04-29 | 成都宝通天宇电子科技有限公司 | High-precision multi-ring data compression method |
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Application publication date: 20161116 |