CN1383304A - Method and device for detecting phase - Google Patents
Method and device for detecting phase Download PDFInfo
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- CN1383304A CN1383304A CN 01109593 CN01109593A CN1383304A CN 1383304 A CN1383304 A CN 1383304A CN 01109593 CN01109593 CN 01109593 CN 01109593 A CN01109593 A CN 01109593A CN 1383304 A CN1383304 A CN 1383304A
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Abstract
This invention provides a phase detecting method comprisinga quadrant decision program, a first comparison program, a second comparison program, a coordinate value conversion program and a phase computing program. The phase computing program gets a first and second approximate phase values from the quadrant decision program and the first comparison program separately and gets a third phase approximate value from the second comparison program and the coordinate value conversion program then to calculate the total phase value from the phase computing program. It is not necessary to get phase values by looking-up table to save room for the mass memory. In addition, this invention also provides a phase detection device.
Description
The invention relates to a kind of detecting phase method and device thereof, be meant a kind of detecting phase method and device thereof that utilizes the phase demodulating device especially.
In general communication technique field, the application of phase demodulating device can be said so quite general, and it can be disposed in the phase modulation system mostly, to convert a high-frequency signal to a digital signal.Existing phase demodulating device as shown in Figure 1, it is one to include the phase demodulating apparatus 6 of a symbol sequential reflex circuit 65, as shown in the drawing, this phase demodulating apparatus 6 still comprises a radio circuit 61, an analog-digital converter 62, a matched filter 63, reaches phase difference generation circuit 64.
Wherein, this radio circuit 61 is in order to receive an analog high frequency and to convert thereof into an analog if signal; This analog if signal is again through the conversion of this analog-digital converter 62 and matched filter 63 and filtering and then produce a homophase (in-phase) signal I, an and quadrature (quadrature) signal Q, generally speaking this in-phase signal I, and orthogonal signalling Q be divided into a digital signal (signed signal) that has a sign; This phase difference produces circuit 64 and asks for a phase difference according to in-phase signal I and orthogonal signalling Q; 65 phase differences of being exported according to this phase difference generation circuit 64 of this symbol sequential reflex circuit carry out symbol sequential and reply.
With regard to above-mentioned phase difference produces circuit 64, it generally includes a phase detection unit 641, reaches a phase difference generation unit 642 (as shown in Figure 2), wherein, this phase detection unit 641 decides a phase theta according to in-phase signal I and orthogonal signalling Q, more specifically, generally this phase detection unit 641 adopts lookup table mode to decide a phase theta; Utilize this phase theta to ask for a phase difference θ in this phase difference generation unit 642, utilize for above-mentioned symbol sequential reflex circuit 65.
From the above, because producing the phase detection unit 641 of circuit 64, above-mentioned phase difference when determining a phase theta, adopt lookup table mode to reach, therefore the relation of I and the pairing phase theta of Q must be stored in the internal memory of a phase modulation system in advance, so that this phase detection unit 641 decides its pairing phase theta according to I and Q.Yet, usually the shared memory size of the relation table of I and Q corresponding phase θ is quite big, make demodulator in the ASIC process, also can increase gate number (gate count) simultaneously, this communication apparatus little (for example mobile phone) for the space, its sizable space that will account for, reduce with the effective usability that causes this device's memory capacity, therefore how otherwise to ask for phase place, and avoid utilization to use lookup table mode, and then make that demodulator really can reduced volume in the ASIC process and save cost, be an important problem in fact.
Because the problems referred to above the object of the present invention is to provide a kind of detecting phase method and device thereof that saves the massage storage space.
And feature of the present invention provides a kind of detecting phase method and device thereof that utilizes rectangular coordinate representation and polar coordinate representation method to ask for phase place, so promptly need not ask for phase place with lookup table mode, and then reaches the purpose of saving the massage storage space.
The present invention is achieved through the following technical solutions:
A kind of detecting phase device, being used in one has in the phase demodulating device of certain phase resolution, in-phase signal and orthogonal signalling that it utilizes this phase demodulating device to be produced, the absolute value that reaches in-phase signal and orthogonal signalling comes evaluation phase, and it is characterized in that: institute's detecting phase device comprises:
One quadrant determination module, in order to receive this in-phase signal and orthogonal signalling, and judge coordinate quadrature under these signals according to the highest order of this in-phase signal and orthogonal signalling, and produce one first phase place approach according to this coordinate quadrature, and export the absolute value of this in-phase signal and orthogonal signalling;
One first comparison module, in order to receive the in-phase signal that this quadrant determination module exported and the absolute value of orthogonal signalling, and produce one second phase place approach according to the magnitude relationship of the absolute value of this in-phase signal and orthogonal signalling, and with the greater in the absolute value of in-phase signal and orthogonal signalling as first coordinate figure and the smaller exports as second coordinate figure;
One second comparison module in order to receiving two coordinate figures, and is a divisor with the greater in two coordinate figures, obtaining a coordinate ratio, and then produces a third phase position approach, and produces an anglec of rotation according to coordinate ratio size;
One coordinate figure modular converter, in order to receive two coordinate figures exported from this second comparison module, and the anglec of rotation, and convert these coordinate figures to three-dimensional value and 4-coordinate value respectively, and this three-dimensional value and 4-coordinate value are imported in this second comparison module with specific function relation; And
One phase calculation module in order to receiving this first phase place approach, the second phase place approach, third phase position approach, and is estimated total phase place of this in-phase signal and orthogonal signalling according to this second phase place approach.
A kind of detecting phase method is used in one and has in the phase demodulating device of certain phase resolution, comprises:
One quadrant decision procedure is judged the coordinate quadrature that these signals are affiliated according to the highest order of an in-phase signal and orthogonal signalling, and produces one first phase place approach according to this coordinate quadrature, and calculates the absolute value of this phase signals and orthogonal signalling;
One first comparison program, the magnitude relationship that is dependent on the absolute value of the in-phase signal that calculated in the above-mentioned quadrant decision procedure and orthogonal signalling produces one second phase place approach, and is first coordinate figure and smaller's order is second coordinate figure with the greater order in the absolute value of in-phase signal and orthogonal signalling;
One second comparison program is a divisor with the greater in two coordinate figures, asking for a coordinate ratio, and then produces a third phase position approach and produces an anglec of rotation according to this coordinate ratio size;
One coordinate figure conversion program, by two coordinate figures, and anglec of rotation α, and convert these coordinate figures to three-dimensional value and 4-coordinate value respectively with specific function relation, when the ratio of this three-dimensional value and 4-coordinate value during, then carry out above-mentioned second comparison program once again greater than certain value; And
One phase calculation program is estimated total phase place of this in-phase signal and orthogonal signalling according to this second phase place approach.
Detecting phase device provided by the invention, comprise a quadrant (quadrant) determination module, one first comparison module, one second comparison module, a coordinate figure modular converter, a phase calculation module, its respectively by this quadrant determination module, and first comparison module asks for first respectively, and the second phase place approach, and ask for third phase position approach by second comparison module and coordinate figure modular converter, utilize this phase calculation module to estimate total phase place again.
In addition, the present invention also provides a kind of detecting phase method, it comprises a quadrant decision procedure, one first comparison program, one second comparison program, a coordinate figure conversion program, a phase calculation program, its respectively at this quadrant decision procedure, and first comparison program in ask for first respectively, and the second phase place approach, and in second comparison program and coordinate figure conversion program, ask for third phase position approach, in this phase calculation program, estimate total phase place again.
Because detecting phase device of the present invention can estimate a phase value with simple logic comparison easily, be with, need not as prior art, decide phase place with lookup table mode, therefore can reduce the use of memory size in a large number.
Fig. 1 is the square key diagram of the formation of existing phase demodulating apparatus.
Fig. 2 is the formation square key diagram that the phase difference of existing phase demodulating apparatus produces circuit.
Fig. 3 is the flow chart illustration of detecting phase method of the present invention.
Fig. 4 is the step key diagram of the phase calculation program of detecting phase method of the present invention.
Fig. 5 is the step key diagram of second comparison program of detecting phase method of the present invention.
Fig. 6 is the formation square key diagram of the detecting phase device of preferred embodiment of the present invention.
Fig. 7 is the formation square key diagram of the phase calculation module of preferred embodiment of the present invention.
To be expression represent that with 10bits phase theta concerns key diagram in the I-Q rectangular coordinate of 0 ~ 360 degree to Fig. 8.
Table 1 is to represent when n=1024 the corresponding relation of coordinate ratio, the anglec of rotation and third phase position approach PH3.
Table 2 be expression when n=1024, coordinate ratio, reach another corresponding relation of third phase position approach PH3.
Label declaration
11 quadrant decision procedures
12 first comparison program
13 second comparison program
14 coordinate figure conversion programs
15 phase calculation programs
151 steps that add
152 accumulative total steps
153 amount to step
2 detecting phase devices
21 quadrant determination modules
22 first comparison modules
23 second comparison modules
24 coordinate figure modular converters
25 phase calculation modules
251 unit that add
252 accumulated units
253 amount to the unit
The detecting phase method
Below, specify detecting phase method of the present invention according to Fig. 3～Fig. 5.Before specifying detecting phase method of the present invention, what desire explanation earlier is, detecting phase method of the present invention is used in phase detection unit shown in Figure 2 641, to determine a phase theta, wherein, detecting phase device of the present invention is used in one and has in the phase demodulating device that certain phase resolution is n; In addition in the present embodiment, the phase theta of detecting phase device generation of the present invention is represented 0 ~ 360 degree with binary system.In addition, detecting phase method of the present invention mainly utilizes rectangular coordinate representation and polar coordinate representation method to ask for phase place, and is omitted in following explanation about rectangular coordinate representation and polar coordinate representation method.
As shown in Figure 3, detecting phase method of the present invention comprises a quadrant decision procedure 11, one first comparison program 12, one second comparison program 13, a coordinate figure conversion program 14, reaches a phase calculation program 15.
In this quadrant decision procedure 11, judge coordinate quadrature under these signals are in an I-Q rectangular coordinate according to the highest order of the in-phase signal I of a signal and orthogonal signalling Q, and produce one first phase place approach PH1 according to this coordinate quadrature, simultaneously, calculate this in-phase signal and orthogonal signalling absolute value (| I|, | Q|).In this enforcement, when the coordinate quadrature of being judged was represented with m, then this first phase place approach was (n/4) * (m-1), and wherein n, m are integer, and n＞0,1≤m≤4.Changing speech, in this quadrant decision procedure 11, promptly is to utilize the highest order of this in-phase signal and orthogonal signalling to judge these signals are arranged in which quadrant of an I-Q rectangular coordinate.In the present embodiment, phase theta 0 ~ 360 degree represents with 10 positions, so when phase resolution n=1024, PH1=0,256,512 or 768 then.Be the I-Q rectangular coordinate of representing phase theta 0 ~ 360 degree with 10bits as shown in Figure 8, the phase place of this in-phase signal I and orthogonal signalling Q drop on the I-Q rectangular coordinate first, second and third or four-quadrant one of them, decision PH1 value is done primary phase place convergence by this quadrant decision procedure 11.
Magnitude relationship according to the Q absolute value of this in-phase signal I and orthogonal signalling in this first comparison program 12 produces one second phase place approach PH2, and with the greater in the absolute value of in-phase signal and orthogonal signalling as first coordinate figure and with the smaller as second coordinate figure.In present embodiment respectively with first coordinate figure, and second coordinate figure order be X, Y, when the absolute value of this in-phase signal during greater than the absolute value of these orthogonal signalling, this second phase place approach is 0 (PH2=0), the phase place of this interval scale this in-phase signal I and orthogonal signalling Q is after rotation PH1 value phase place, and the phase place of these signals drops on I district shown in Figure 8; Otherwise, when the absolute value of this in-phase signal during less than the absolute value of these orthogonal signalling, then this second phase place approach is n/8 (PH2=n/8), and the phase place of this interval scale this in-phase signal I and orthogonal signalling Q is after rotation PH1 value phase place, and the phase place of these signals drops on II district shown in Figure 8.
In this second comparison program 13, utilize coordinate figure (X, Y) (or (X
1, Y
1)) obtain a coordinate ratio Y/X (or Y
1/ X
1), and then produce a third phase position approach PH3 according to coordinate ratio size, produce an anglec of rotation α simultaneously, and (X
1, Y
1) (X, phase place Y) is through rotating the coordinate that is obtained behind the anglec of rotation α to represent this two coordinate figure.Wherein, third phase position approach PH3, and anglec of rotation α can produce in the following manner:
When coordinate ratio 〉=(3/4), then PH3=n * (36.87/360), and anglec of rotation α=36.87 degree; When (3/4) 〉=coordinate ratio 〉=(1/2), then PH3=n * (26.57/360), and anglec of rotation α=26.57 degree; When (1/2) 〉=coordinate ratio 〉=(1/4), then PH3=n * (14.04/360), and anglec of rotation α=14.04 degree; When (1/4) 〉=coordinate ratio 〉=(1/8), then PH3=n * (7.13/360), and anglec of rotation α=7.13 degree.At this, what specify is, why when coordinate ratio 〉=(3/4), then anglec of rotation α is 36.87 degree, its reason is that 36.87 degree promptly are that coordinate ratio=3/4 is the angle number of degrees of 3: 4: 5 right-angled triangle corresponding to a length of side ratio, the reckoning principle of other anglec of rotation α also with.
In addition, when (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 3 〉=p 〉=0 o'clock, then PH3=p+1; When (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 6 〉=p 〉=4 o'clock, then PH3=p+2; When (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 10 〉=p 〉=7 o'clock, then PH3=p+3; When (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 15 〉=p 〉=11 o'clock, PH3=p+4 then, wherein p is an integer.At this, special instruction be, this group relation is in order to asking for 7.13 degree with interior phase place approach, and should group coordinate ratio inequality and on-fixed, it can do suitable adjustment with phase resolution n.
Concern as can be known that from the above mentioned when n=1024, above-mentioned relation then can be expressed as the relation shown in table 1 and the table 2.At this, what desire to be illustrated is, represent with 10 unitss if the phase theta that detecting phase device of the present invention produces is non-, then the n value also with change, and the above-mentioned first phase place approach PH1, the second phase place approach PH2, third phase position approach PH3 and 7.13 degree are also done suitably to adjust with interior coordinate ratio inequality simultaneously.
In addition, Fig. 5 is the step-by-step procedures figure of second comparison program 13 among Fig. 3, as shown in Figure 5, and as coordinate ratio Y/X (or Y
1/ X
1) during less than 8/n, then stop this second comparison program, 13 runnings; Wherein, whether step 131 is in order to compare coordinate ratio less than 8/n, if then stop this second comparison program, 13 runnings, if not then carry out step 132 to ask for third phase position approach PH3 and anglec of rotation α, that is whenever carry out step 132, with the action that produces a third phase position approach PH3 and rotate an anglec of rotation α, in order to do adding up third phase position approach PH3 in following phase calculation program 15.
From the above, the generation of third phase position approach PH3 and anglec of rotation α, it mainly uses polar coordinates rotation notion, that is, when after the quadrant decision procedure 11 and first comparison program 12, the phase place of this in-phase signal I and orthogonal signalling Q has been contracted to the scope of 45 degree by convergence, that is the phase place of these signals drops on I district shown in Figure 8, therefore, as long as proportion of utilization relation and rotation of coordinate notion get final product the true phase place of further convergence again.In addition, because in digital circuit, the computing for 1/2,1/4,1/8 etc. only need move right one, two or three, and therefore, with regard to above-mentioned coordinate ratio, its main comparison condition is divided into 3/4 (1/2+1/4), 1/2,1/4,1/8 etc.36.87 degree, 26.57 degree, 14.04 degree, and 7.13 degree promptly be correspond respectively to 3/4,1/2,1/4, the angle of 1/8 rectangular coordinate that is become, other angle is by that analogy.
In this coordinate figure conversion program 14, utilize two coordinate figure (X, Y), reach anglec of rotation α, and convert these coordinate figures to three-dimensional value and 4-coordinate value respectively with specific function relation, whether this three-dimensional value and 4-coordinate value can carry out the foundation of this second comparison program 13 once again in order to conduct, more detailed it, promptly be this three-dimensional value and 4-coordinate value are considered as first coordinate figure and second coordinate figure respectively and carry out above-mentioned second comparison program 13 once again.In present embodiment respectively with the three-dimensional value, and 4-coordinate value order be X
1, Y
1, in view of the above, above-mentioned specific function closes and is:
X
1＝Xcosα+Ysinα，
Y
1＝Ycosα-Xsinα
That is, work as Y
1/ X
1During＞8/n, then and continue above-mentioned second comparison program 13.
In this phase calculation program 15 according to the above-mentioned first phase place approach PH1, the second phase place approach PH2, and third phase position approach PH3 estimate total phase place PH of this in-phase signal and orthogonal signalling.As shown in Figure 4, in present embodiment, this phase calculation program 15 comprise one add step 151, an accumulative total step 152, and one amount to step 153, wherein this step 151 that adds adds the first phase place approach PH1 and the second phase place approach PH2; This accumulative total step 152 couple third phase position approach PH3 adds up, and in this enforcement, its aggregate-value is with PH
tExpression; This total step 153 amounts to according to the value of the second phase place approach PH2, and to export a total phase place PH, when PH2=0, this total step 153 is carried out PH=PH1+PH2+PH
tComputing; When PH2=n/8, this total step 153 is carried out PH=PH1+PH2+ (n/8)-PH
tComputing.
Below will lift one specifies example and further specifies detecting phase method of the present invention.
Specify example
In this illustrative examples, in-phase signal I and orthogonal signalling Q are respectively 12 signals (signed 12 bits) that have sign, and phase resolution n=1024 (unsigned 10 bits, 0～1023).What this should be specified be, be the facility in the explanation, in-phase signal I and orthogonal signalling Q represent with metric value respectively in the following description.
When (I, in the time of Q)=(1000 ,-200), then (I Q) is arranged in the third quadrant of I-Q rectangular coordinate, that is m=3, therefore, and the above-mentioned first phase place approach PH1=(n/4) * (m-1)=512.
Again, because of ABS (I)=1000＞ABS (Q)=200, therefore (X, Y)=(1000,200), and PH2=0.
Again, because (1/4) 〉=(200/1000) 〉=(1/8), so PH3=n * (7.13/360) 20, α=7.13 degree, at this moment, PH
t=20.
Learn according to above-mentioned transformational relation: (X again,
1, Y
1)=(1025,75).
Because (10/128) 〉=(75/1025) 〉=(9/128), that is above-mentioned p=9, so PH3=9+3=12.At this moment, PH
t=20+12=32.
Again because PH2=0, therefore, PH=512+0+32=544.
So, PH
θ=PH * (360/n)=544 * (360/1024) 191.25 spends.
By this illustrative examples as can be known, can estimate a phase value with simple logic comparison easily by detecting phase method of the present invention, be with, need not as prior art, decide phase place with lookup table mode, therefore can reduce the use of memory headroom in a large number.
The detecting phase device
See also shown in Figure 6ly, a preferred embodiment of detecting phase device 2 of the present invention comprises a quadrant determination module 21, one first comparison module 22, one second comparison module 23, a coordinate figure modular converter 24, an and phase calculation module 25.
This quadrant determination module 21 is in order to receive in-phase signal I and orthogonal signalling Q, and judge coordinate quadrature under these signals according to the highest order of this in-phase signal and orthogonal signalling, and produce one first phase place approach PH1 according to this coordinate quadrature, and export the absolute value of this in-phase signal and orthogonal signalling.Mode described in the concrete producing method of the relevant first phase place approach PH1 such as the above-mentioned detecting phase method.
This first comparison module 22 is in order to the in-phase signal that receives this quadrant determination module 21 and exported and the absolute value of orthogonal signalling, and produce one second phase place approach PH2 according to the magnitude relationship of the absolute value of this in-phase signal and orthogonal signalling, and with the greater in the absolute value of in-phase signal and orthogonal signalling as first coordinate figure and the smaller exports as second coordinate figure, in present embodiment respectively with first coordinate figure, and the order of second coordinate figure be X, Y.The concrete producing method of the relevant second phase place approach PH2 such as the mode of above-mentioned detecting phase method.
This second comparison module 23 in order to receive two coordinate figures ((X, Y) or (X
1, Y
1)), and be divisor with the greater in two coordinate figures, obtaining a coordinate ratio, and then produce a third phase position approach PH3, produce an anglec of rotation α simultaneously according to this coordinate ratio size.The concrete producing method of relevant third phase position approach PH3, and the mode of anglec of rotation α producing method such as above-mentioned detecting phase method.
This coordinate figure modular converter 24 is in order to receive the two coordinate figures (X that is exported from this second comparison module 23, Y), reach anglec of rotation α, and convert these coordinate figures to three-dimensional value and 4-coordinate value respectively with specific function relation, and this three-dimensional value and 4-coordinate value imported in this second comparison module, in present embodiment respectively with the three-dimensional value, and the order of 4-coordinate value be X
1, Y
1, in view of the above, above-mentioned specific function closes and is:
X
1＝Xcosα+Ysinα，
Y
1＝Ycosα-Xsinα
This phase calculation module 25 is in order to receiving the above-mentioned first phase place approach PH1, the second phase place approach PH2, third phase position approach PH3, and estimates total phase place of this in-phase signal and orthogonal signalling according to this second phase place approach PH2.As shown in Figure 7, in present embodiment, 25 groups of this phase calculation moulds comprise one add unit 251, an accumulated unit 252, and one amount to unit 253, wherein this unit 251 that adds is in order to add the first phase place approach PH1 and the second phase place approach PH2; This accumulated unit 252 is in order to third phase position approach PH3 is added up, and in this enforcement, its aggregate-value is with PH
tExpression; This total unit 253 amounts to according to the value of the second phase place approach PH2, to export a total phase place PH.The concrete account form of relevant total phase place PH then as the mode of above-mentioned detecting phase method.
In sum because detecting phase device of the present invention can estimate a phase value with simple logic comparison easily, be with, need not as prior art, decide phase place with lookup table mode, therefore can reduce the use of memory size in a large number.
The specific embodiment that is proposed in the detailed description of preferred embodiment is only in order to be easy to illustrate technology contents of the present invention, and be not with narrow sense of the present invention be limited to this embodiment, in the situation that does not exceed spirit of the present invention and claim scope, can make many variations and implement.
Table 1
| Relational expression | ?sinα | Relational expression | ?PH3 | Relational expression | ??PH3 |
| (15/128)≤(Y/X)＜(16/128) | 20 | (9/128)≤(Y/X)＜(10/128) | 12 | (3/128)≤(Y/X)＜(4/128) | ??4 |
| (14/128)≤(Y/X)＜(15/128) | 18 | (8/128)≤(Y/X)＜(9/128) | 11 | (2/128)≤(Y/X)＜(3/128) | ??3 |
| (13/128)≤(Y/X)＜(14/128) | 17 | (7/128)≤(Y/X)＜(8/128) | 10 | (1/128)≤(Y/X)＜(2/128) | ??2 |
| (12/128)≤(Y/X)＜(13/128) | 16 | (6/128)≤(Y/X)＜(7/128) | 8 | 0≤(Y/X)＜(1/128) | ??1 |
| (11/128)≤(Y/X)＜(12/128) | 15 | (5/128)≤(Y/X)＜(6/128) | 7 | Y＝0 | ??0 |
| (10/128)≤(Y/X＜(11/128) | 13 | (4/128)≤(Y/X)＜(5/128) | 6 |
Table 2
Claims (19)
1. detecting phase device, being used in one has in the phase demodulating device of certain phase resolution, in-phase signal and orthogonal signalling that it utilizes this phase demodulating device to be produced, the absolute value that reaches in-phase signal and orthogonal signalling comes evaluation phase, and it is characterized in that: institute's detecting phase device comprises:
One quadrant determination module, in order to receive this in-phase signal and orthogonal signalling, and judge coordinate quadrature under these signals according to the highest order of this in-phase signal and orthogonal signalling, and produce one first phase place approach according to this coordinate quadrature, and export the absolute value of this in-phase signal and orthogonal signalling;
One first comparison module, in order to receive the in-phase signal that this quadrant determination module exported and the absolute value of orthogonal signalling, and produce one second phase place approach according to the magnitude relationship of the absolute value of this in-phase signal and orthogonal signalling, and with the greater in the absolute value of in-phase signal and orthogonal signalling as first coordinate figure and the smaller exports as second coordinate figure;
One second comparison module in order to receiving two coordinate figures, and is a divisor with the greater in two coordinate figures, obtaining a coordinate ratio, and then produces a third phase position approach, and produces an anglec of rotation according to coordinate ratio size;
One coordinate figure modular converter, in order to receive two coordinate figures exported from this second comparison module, and the anglec of rotation, and convert these coordinate figures to three-dimensional value and 4-coordinate value respectively, and this three-dimensional value and 4-coordinate value are imported in this second comparison module with specific function relation; And
One phase calculation module in order to receiving this first phase place approach, the second phase place approach, third phase position approach, and is estimated total phase place of this in-phase signal and orthogonal signalling according to this second phase place approach.
2. detecting phase device as claimed in claim 1 is characterized in that: this phase demodulating device is one to have the phase demodulating device that phase resolution is n; In this quadrant determination module, when the coordinate quadrature of being judged was represented with m, then this first phase place approach was (n/4) * (m-1), and wherein n, m are integer, and n＞0; 1≤m≤4.
3. detecting phase device as claimed in claim 1 is characterized in that: in the coordinate figure modular converter, specific function closes and is:
X
1＝Xcosα+Ysinα，
Y
1＝Ycosα-Xsinα，
Wherein X, Y are respectively two coordinate figures that this coordinate figure modular converter is received, and X 〉=Y; X
1, Y
1Be respectively this three-dimensional value and 4-coordinate value; And the anglec of rotation that α exports for this second comparison module.
4. detecting phase device as claimed in claim 1, it is characterized in that: this phase calculation module comprise one add unit, an accumulated unit, and one amount to the unit, wherein this this add the unit in order to the first phase place approach PH1 and the second phase place approach PH2 are added; This accumulated unit is in order to add up third phase position approach PH3; This total unit amounts to according to the value of the second phase place approach PH2, to export a total phase place PH; If aggregate-value is with PH
tExpression, then when PH2=0, PH=PH1+PH2+PH
t, when PH2=n/8, PH=PH1+PH2+ (n/8)-PH
t
5. detecting phase device as claimed in claim 2 is characterized in that: in this second comparison module, when coordinate ratio 〉=(3/4), then this third phase position approach is: n * (36.87/360), and anglec of rotation α=36.87 degree; When (3/4) 〉=coordinate ratio 〉=(1/2), then this third phase position approach is: n * (26.57/360), and anglec of rotation α=26.57 degree; When (1/2) 〉=coordinate ratio 〉=(1/4), then this third phase position approach is: n * (14.04/360), and anglec of rotation α=14.04 degree; When (1/4) 〉=coordinate ratio 〉=(1/8), then this third phase position approach is: n * (7.13/360), and anglec of rotation α=7.13 degree.
6. detecting phase device as claimed in claim 2 is characterized in that: in this second comparison module, when (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 0 〉=p 〉=3 o'clock, then this third phase position approach is (p+1); When (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 6 〉=p 〉=4 o'clock, then this third phase position approach is (p+2); When (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 10 〉=p 〉=7 o'clock, then this third phase position approach is (p+3); When (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 15 〉=p 〉=11 o'clock, then this third phase position approach is (p+4), wherein p is an integer.
7. detecting phase device as claimed in claim 2 is characterized in that: in this second comparison module, when coordinate ratio during less than 8/n, then this second comparison module promptly decommissions.
8. detecting phase device as claimed in claim 2, it is characterized in that: in this first comparison module, when the absolute value of this in-phase signal greater than the value of these orthogonal signalling during to value, this second phase place approach is 0, when the absolute value of this in-phase signal during less than the absolute value of these orthogonal signalling, this second phase place approach is n/8.
9. detecting phase device as claimed in claim 2 is characterized in that: n=1204.
10. a detecting phase method is used in one and has in the phase demodulating device of certain phase resolution, comprises:
One quadrant decision procedure is judged the coordinate quadrature that these signals are affiliated according to the highest order of an in-phase signal and orthogonal signalling, and produces one first phase place approach according to this coordinate quadrature, and calculates the absolute value of this phase signals and orthogonal signalling;
One first comparison program, the magnitude relationship that is dependent on the absolute value of the in-phase signal that calculated in the above-mentioned quadrant decision procedure and orthogonal signalling produces one second phase place approach, and is first coordinate figure and smaller's order is second coordinate figure with the greater order in the absolute value of in-phase signal and orthogonal signalling;
One second comparison program is a divisor with the greater in two coordinate figures, asking for a coordinate ratio, and then produces a third phase position approach and produces an anglec of rotation according to this coordinate ratio size;
One coordinate figure conversion program, by two coordinate figures, and anglec of rotation α, and convert these coordinate figures to three-dimensional value and 4-coordinate value respectively with specific function relation, when the ratio of this three-dimensional value and 4-coordinate value during, then carry out above-mentioned second comparison program once again greater than certain value; And
One phase calculation program is estimated total phase place of this in-phase signal and orthogonal signalling according to this second phase place approach.
11. detecting phase method as claimed in claim 10, wherein this phase demodulating device is one to have the phase demodulating device that phase resolution is n; In this quadrant decision procedure, when the coordinate quadrature of being judged was represented with m, then this first phase place approach was (n/4) * (m-1), and wherein n, m are integer, and n＞0,1≤m≤4.
12. detecting phase method as claimed in claim 10, wherein, in the coordinate figure conversion program, this specific function closes and is:
X
1＝Xcosα+Ysinα，
Y
1＝Ycosα-Xsinα，
Wherein X, Y are respectively two coordinate figures that this coordinate figure conversion program is received, and X 〉=Y; X
1, Y
1Be respectively this three-dimensional value and 4-coordinate value; And the anglec of rotation that α exports for this second comparison program.
13. detecting phase method as claimed in claim 10, wherein, this phase calculation program comprise one add step, an accumulative total step, and one amount to step, in the step that wherein adds, the first phase place approach PH1 and the second phase place approach PH2 are added in this this; In this accumulative total step, approach PH3 adds up with the third phase position; And amount in the step in this, the value of the foundation second phase place approach PH2 amounts to, to obtain a total phase place PH; When aggregate-value with PH
tDuring expression, then when PH2=0, PH=PH1+PH2+PH
t, when PH2=n/8, PH=PH1+PH2+ (n/8)-PH
t
14. detecting phase method as claimed in claim 11, wherein, this definite value is (8/n).
15. detecting phase method as claimed in claim 11, wherein, in this second comparison program, when coordinate ratio 〉=(3/4), then this third phase position approach is: n * (36.87/360), and anglec of rotation α=36.87 degree; When (3/4) 〉=coordinate ratio 〉=(1/2), then this third phase position approach is: n * (26.57/360), and anglec of rotation α=26.57 degree; When (1/2) 〉=coordinate ratio 〉=(1/4), then this third phase position approach is: n * (14.04/360), and anglec of rotation α=14.04 degree; When (1/4) 〉=coordinate ratio 〉=(1/8), then this third phase position approach is: n * (7.13/360), and anglec of rotation α=7.13 degree.
16. detecting phase method as claimed in claim 11, wherein, in this second comparison program, when (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 0 〉=p 〉=3 o'clock, then this third phase position approach is (p+1); When (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 6 〉=p 〉=4 o'clock, then this third phase position approach is (p+2); When (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 10 〉=p 〉=7 o'clock, then this third phase position approach is (p+3); When (8/n) (p+1) 〉=coordinate ratio 〉=(8/n) p, and 15 〉=p 〉=11 o'clock, then this third phase position approach is (p+4), wherein p is an integer.
17. detecting phase method as claimed in claim 11, wherein, in this second comparison program, when coordinate ratio during less than 8/n, then this second comparison program promptly decommissions.
18. detecting phase method as claimed in claim 11, wherein, in this first comparison program, when the absolute value of this in-phase signal greater than the value of these orthogonal signalling during to value, this second phase place approach is 0, when the absolute value of this in-phase signal during less than the absolute value of these orthogonal signalling, this second phase place approach is n/8.
19. detecting phase method as claimed in claim 11, wherein, n=1204.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011095938A CN1148037C (en) | 2001-04-23 | 2001-04-23 | Method and device for detecting phase |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011095938A CN1148037C (en) | 2001-04-23 | 2001-04-23 | Method and device for detecting phase |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388873B (en) * | 2007-09-10 | 2012-04-04 | 华为技术有限公司 | Data signal modulation, demodulation method, transceiver and transceiving system |
| CN101388872B (en) * | 2007-09-10 | 2012-08-29 | 华为技术有限公司 | Data signal modulation, demodulation method, transceiver and transceiving system |
-
2001
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388873B (en) * | 2007-09-10 | 2012-04-04 | 华为技术有限公司 | Data signal modulation, demodulation method, transceiver and transceiving system |
| CN101388872B (en) * | 2007-09-10 | 2012-08-29 | 华为技术有限公司 | Data signal modulation, demodulation method, transceiver and transceiving system |
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