CN101154958A - Method for adjusting inphase/orthogonal signal - Google Patents
Method for adjusting inphase/orthogonal signal Download PDFInfo
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- CN101154958A CN101154958A CNA2006101317048A CN200610131704A CN101154958A CN 101154958 A CN101154958 A CN 101154958A CN A2006101317048 A CNA2006101317048 A CN A2006101317048A CN 200610131704 A CN200610131704 A CN 200610131704A CN 101154958 A CN101154958 A CN 101154958A
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Abstract
The present invention relates to a method for adjusting the in-phase signal and the orthogonal signal to settle the problem of in-phase/orthogonal unbalance. The method includes respectively delaying the in-phase signal and the orthogonal signal for a scheduled angle to generate the in-phase delay signal and the orthogonal signal; respectively adjusting the vibration amplitude of the in-phase signal, orthogonal signal, in-phase delay signal and the orthogonal delay signal according to the vibration amplitude diversity signal and the phase diversity signal; adding the adjusted in-phase signal to the in-phase delay signal; and adding the adjusted orthogonal signal to the orthogonal delay signal.
Description
Technical field
The invention provides a kind of method of adjusting inphase/orthogonal signal, more particularly, the invention provides the phase place of adjustment inphase/orthogonal signal in a kind of communication system and the method for amplitude.
Background technology
In communication system, homophase signal (in phase signal) and orthogonal signal (quadrature phasesignal) are considerable for the quality of communication.The balance of homophase signal and orthogonal signal, it is very big to influence communication quality.For instance, in general direct change type transceiver (direct conversiontransceiver), the imbalance of inphase/orthogonal signal, the vectorial amplitude that will lead to errors (error vectormagnitude, EVM) Biao Xian decline.And in the transceiver (IF transceiver) of intermediate frequency, the imbalance of inphase/orthogonal signal also can cause the performance of compound filter reduction to the imaginary signal filtering.
The homophase signal is defined as with the orthogonal signal balance: 1. the homophase signal equates with the amplitude of orthogonal signal; 2. the phase place 90 of the leading orthogonal signal of homophase signal is spent.And in general, cause that the inphase/orthogonal signal reason of unbalanced has the path of not the matching of active assembly, layout not match and load does not match.
Please refer to Fig. 1.Fig. 1 is for connect the schematic diagram of change type transceiver transmission ends 100 always.As shown in the figure, directly change type transceiver transmission ends 100 comprises a fundamental module (basebandmodule) 110 and a radio frequency (radio frequency) module 120.Radio-frequency module 120 comprises two frequency mixer M1-M2, add circuit S1, a local oscillator (local oscillator) L1 and a delay circuit D1.Frequency mixer M1 comprises two inputs, and an input is coupled to an output of fundamental module 110, in order to receive homophase signal I1; Another input is coupled to the output of local oscillator L1, in order to receive the homophase signal I2 of local oscillator output.Frequency mixer M2 comprises two inputs, and an input is coupled to an output of fundamental module 110, in order to receive orthogonal signal Q1; Another input is coupled to the output of delay circuit D1, the orthogonal signal Q2 that is exported in order to receive delay circuit D1.The input of delay circuit D1 is coupled to local oscillator L1, in order to phase delay 90 degree and the output of homophase signal I2 that local oscillator is exported.Frequency mixer M1 just with the homophase signal I1 that received with after I2 mixes, output homophase signal I3.Frequency mixer M2 just with the orthogonal signal Q1 that received with after Q2 mixes, output orthogonal signal Q3.Add circuit S1 comprises two inputs, and an input is coupled to the output of frequency mixer M1, in order to receive homophase signal I3; Another input is coupled to the output of frequency mixer M2, in order to receive orthogonal signal Q3.Add circuit S1 is just with homophase signal I3 and orthogonal signal Q3 addition, output signal C1.And if homophase signal I3 and orthogonal signal Q3 imbalance, then the signal C1 that goes out of addition just has problem as the aforementioned.Homophase signal I3 and orthogonal signal Q3 reason of unbalanced might be because frequency mixer M1 with M2 does not match, also might be because the orthogonal signal Q2 imbalance that the homophase signal I2 that exported of local oscillator L1 and delay circuit D1 are exported, also might be homophase signal I1 and the orthogonal signal Q1 imbalance of being exported because of fundamental module 110.Therefore, just must solve above-mentioned unbalanced problem, just can draw mixed-signal preferably, to promote communication quality.
Summary of the invention
The invention provides a kind of phase difference and amplitude difference signal that uses programmable, can adjust the vector of inphase/orthogonal signal respectively and then proofread and correct the amplitude of inphase/orthogonal signal and the method for phase place.This framework comprises reception one phase difference signal; Receive an amplitude difference signal; Receive one first homophase signal; Postpone the phase place of this first homophase signal with a predetermined angular, to produce one first with the phase retardation signal; According to this phase difference signal and this amplitude difference signal, adjust the amplitude of this first homophase signal, to produce one second homophase signal; According to this phase difference signal and this amplitude difference signal, adjust this first amplitude, to produce one second with the phase retardation signal with the phase retardation signal; With this second homophase signal and this second with the addition of phase retardation signal, to produce one the 3rd homophase signal; Export the 3rd homophase signal; Receive one first orthogonal signal; Postpone the phase place of this first orthogonal signal with this predetermined angular, postpone signal to produce one first quadrature; According to this phase difference signal and this amplitude difference signal, adjust the amplitude of this first orthogonal signal, to produce one second orthogonal signal; According to this phase difference signal and this amplitude difference signal, adjust the amplitude that this first quadrature postpones signal, postpone signal to produce one second quadrature; This second orthogonal signal and this second quadrature are postponed the signal addition, to produce one the 3rd orthogonal signal; And output the 3rd orthogonal signal.
Description of drawings
Fig. 1 is for connect the schematic diagram of change type transceiver transmission ends 100 always.
Fig. 2 is the schematic diagram of first embodiment of inphase/orthogonal signal Adjustment System 200 of the present invention.
Fig. 3 is the thin portion schematic diagram of Adjustment System 200 of the present invention.
Fig. 4 is the flow chart of the method 400 of adjustment inphase/orthogonal signal of the present invention.
Fig. 5 is the vectorial schematic diagram of description of step 415.
Fig. 6 is the vectorial schematic diagram of description of step 425.
Fig. 7 is the vectorial schematic diagram of description of step 430 to step 445.
Fig. 8 is the vectorial schematic diagram of description of step 430 to step 445.
Fig. 9 is the vectorial schematic diagram of description of step 430 steps 445.
Figure 10 is the vectorial schematic diagram of description of step 430 to step 445.
Figure 11 is the partial circuit schematic diagram of Adjustment System 200.
Figure 12 is the schematic diagram of enlargement ratio adjusting module 1110.
Figure 13 is the schematic diagram of second embodiment of Adjustment System 200 of the present invention.
Figure 14 is for connect the schematic diagram of change type transceiver transmission ends 1400 always.
Figure 15 is the schematic diagram of direct change type transceiver transmission ends 1500.
The reference numeral explanation
100,1400,1500 direct change type transceiver transmission ends
110 fundamental modules
120 radio-frequency modules
M1, M2, M3 frequency mixer
The L1 local oscillator
D1, D2, D3 delay circuit
I1, I2, I3, I4, I5, I6 homophase signal
、I7、I8、I9、I10、I11
、I12、
Q1, Q2, Q3, Q4, Q5, Q6 orthogonal signal
、Q7、Q8、Q9、Q1?0、Q11
、Q12
The C1 mixed-signal
200 inphase/orthogonal signal Adjustment System
A, b parameter
210,220,230,240 amplitude amplifiers
S1, S2 add circuit
G, K angle
H, A amplitude
The VDD bias generator
R1, R2 resistance
T1, T2, T3, T4, T5 transistor
、T6、T7、Tn
+6
1110,1120 enlargement ratio adjusting modules
N1, N2, N3, N4, N5, N6 node
1210 current mirrors
The S1-Sn switch
The IREF reference current
1410,1510 vector analysis instrument
Embodiment
Please refer to Fig. 2.Fig. 2 is the schematic diagram of first embodiment of inphase/orthogonal signal Adjustment System 200 of the present invention.As shown in the figure, Adjustment System 200 comprises four-input terminal, two outputs, and wherein two inputs are in order to receive homophase signal I4 and orthogonal signal Q4, two inputs in order to receive amplitude/phase difference signal Control Parameter a and b, two outputs in order to export adjusted homophase signal I5/ orthogonal signal Q5.Before process Adjustment System 200, homophase signal I4 is that Acos (ω t) is that A (1+H) sin (ω t+G) is uneven signal with orthogonal signal Q4; Wherein HA is the uneven parameter of amplitude, and G is the unbalance in phase parameter.And be respectively A ' cos (ω t+G ') and A ' sin (ω t+G ') adjusting the homophase signal I5 and the orthogonal signal Q5 that are exported the back through Adjustment System 200, and homophase signal I5 and orthogonal signal Q5 are balance.Adjustment System 200 is according to parameter a that is received and b, adjusts homophase signal I4 and orthogonal signal Q4 respectively.
Please refer to Fig. 3.Fig. 3 is the thin portion schematic diagram of Adjustment System 200 of the present invention.As shown in the figure, Adjustment System 200 comprises two delay circuit D2 and D3, four amplitude amplifier 210-240, two add circuit S1 and S2.The input that the input of delay circuit D2 is coupled to Adjustment System 200 is in order to receiving homophase signal I4, and with the phase delay one predetermined angular K of homophase signal I4, exports together phase retardation signal I6.The input that the input of delay circuit D3 is coupled to Adjustment System 200 is in order to receiving orthogonal signal Q4, and with the phase delay one predetermined angular K of orthogonal signal Q4, exports a quadrature and postpone signal Q6.The input of amplitude amplifier 210 is coupled to the input of Adjustment System 200, in order to reception homophase signal I4, and according to parameter a and b, adjusts the amplitude of homophase signal I4, exports a homophase signal I8.The input of amplitude amplifier 220 is coupled to the output of delay circuit D2, in order to receiving with phase retardation signal I6, and according to parameter a and b, adjusts the amplitude with phase retardation signal I6, exports together phase retardation signal I7.The input of amplitude amplifier 230 is coupled to the input of Adjustment System 200, in order to reception orthogonal signal Q4, and according to parameter a and b, adjusts the amplitude of orthogonal signal Q4, exports an orthogonal signal Q8.The input of amplitude amplifier 240 is coupled to the output of delay circuit D3, postpones signal Q6 in order to receive quadrature, and according to parameter a and b, adjusts the amplitude that quadrature postpones signal Q6, exports a quadrature and postpones signal Q7.The input of add circuit S1 is coupled to the output of amplitude amplifier 210 and 220, in order to reception homophase signal I8 and with phase retardation signal I7, and with these two signal additions, with output homophase signal I5.The input of add circuit S2 is coupled to the output of amplitude amplifier 230 and 240, postpones signal Q7 in order to receive orthogonal signal Q8 and quadrature, and with these two signal additions, with output orthogonal signal Q5.
Please continue with reference to figure 3.In Fig. 3, amplitude amplifier 210 is according to parameter a and b, and the amplitude of homophase signal I4 is enlarged into (1+a+b) doubly; Amplitude amplifier 220 will be enlarged into (1+a-b) with the amplitude of phase retardation signal I6 doubly according to parameter a and b; Amplitude amplifier 230 is according to parameter a and b, and the amplitude of orthogonal signal Q4 is enlarged into (1-a-b) doubly.Amplitude amplifier 240 is according to parameter a and b, and the amplitude that quadrature is postponed signal Q6 is enlarged into (1-a+b) doubly.And parameter a can become a proportionate relationship with homophase signal I4 with the phase difference signal G of orthogonal signal Q4 with the amplitude difference signal HA of orthogonal signal Q4 with homophase signal I4 respectively with b.For example parameter a and b can be respectively HA/2 and G/3.Therefore, Adjustment System 200 just can come homophase signal I4 and orthogonal signal Q4 are adjusted according to amplitude difference signal HA and phase difference signal G.
Please refer to Fig. 4.Fig. 4 is the flow chart of the method 400 of adjustment inphase/orthogonal signal of the present invention.Now step is described as follows:
Step 410: beginning;
Step 415: Adjustment System 200 receives homophase signal I4 and orthogonal signal Q4;
Step 420: Adjustment System 200 receives parameter a and b;
Step 425: delay circuit D1 and D2 postpone the phase place one predetermined angular K of homophase signal I4 and orthogonal signal Q6 respectively, postpone signal Q6 to produce with phase retardation signal I6 and quadrature;
Step 430: with homophase signal I4 input amplitude amplifier 210, and, adjust the enlargement ratio of amplitude amplifier 210, export homophase signal I8 again according to parameter a and b;
Step 435: will be with phase retardation signal I6 input amplitude amplifier 220, and, adjust the enlargement ratio of amplitude amplifier 220 according to parameter a and b, export again with phase retardation signal I7;
Step 440:, and, adjust the enlargement ratio of amplitude amplifier 230, again output orthogonal signal Q8 according to parameter a and b with orthogonal signal Q4 input amplitude amplifier 230;
Step 445: quadrature is postponed signal Q6 input amplitude amplifier 240, and according to parameter a and b, adjust the enlargement ratio of amplitude amplifier 240, output orthogonal postpones signal Q7 again;
Step 450: with homophase signal I8 and with phase retardation signal I7 addition, output homophase signal I5;
Step 455: orthogonal signal Q8 and quadrature are postponed signal Q7 addition, output orthogonal signal Q5;
Step 460: finish.
Please refer to Fig. 5.Fig. 5 is the vectorial schematic diagram of description of step 415.As shown in the figure, Adjustment System 200 receives a homophase signal I4 and an orthogonal signal Q4.The amplitude difference of homophase signal I4 and orthogonal signal Q4 is HA.The phase difference of homophase signal I4 and orthogonal signal Q4 is G.
Please refer to Fig. 6.Fig. 6 is the vectorial schematic diagram of description of step 425.As shown in the figure, the phase place of homophase signal I4 produces with phase retardation signal I6 after being delayed an angle K; The phase place of orthogonal signal Q4 produces quadrature delay signal Q6 after being delayed an angle K.
Please refer to Fig. 7.Fig. 7 is the vectorial schematic diagram of description of step 430 to step 445.As shown in the figure, Fig. 7 is for to adjust the signal among Fig. 6 with parameter a: with homophase signal I4 be enlarged into (1+a) with the amplitude of phase retardation signal I6 doubly; The amplitude of orthogonal signal Q4 and quadrature delay signal Q6 is enlarged into (1-a) doubly.
Please refer to Fig. 8.Fig. 8 is the vectorial schematic diagram of description of step 430 to step 445.As shown in the figure, after the adjustment via Fig. 7, homophase signal I4, the amplitude that postpones signal Q6 with phase retardation signal I6, orthogonal signal Q4, quadrature are all identical.
Please refer to Fig. 9.Fig. 9 is the vectorial schematic diagram of description of step 430 to step 445.Fig. 9 is for adjusting the signal among Fig. 8 respectively more again with parameter b: (1+a) homophase signal I4 is doubly amplified again to be become (1+a+b) and doubly becomes homophase signal I8; (1+a) same phase retardation signal I6 doubly amplified again to be become (1+a-b) and doubly becomes homophase and postpone signal I7; (1-a) orthogonal signal Q4 doubly amplified again to be become (1-a-b) and doubly becomes orthogonal signal Q8; (1-a) quadrature is doubly postponed signal Q6 to be amplified and becomes (1-a+b) and doubly become quadrature and postpone signal Q7.
Please refer to Figure 10.Figure 10 is the vectorial schematic diagram of description of step 430 to step 445.Figure 10 for homophase signal I8 that Fig. 9 produced with produced homophase signal I5 mutually with phase retardation signal I7; With orthogonal signal Q8 that Fig. 9 produced and quadrature postponed signal Q7 produced orthogonal signal Q5 mutually.And homophase signal I5 is A ' cos (ω t+G '), and orthogonal signal Q5 is A ' sin (ω t+G ').
By finding out among Fig. 5 to Figure 10, parameter a is in order to adjust homophase signal I4 and the orthogonal signal Q4 difference of amplitude between the two, by finding out among Fig. 5, homophase signal I4 and orthogonal signal Q4 amplitude differ HA, therefore, can simply derive a=HA/2 and make the homophase signal I5 obtain at last identical amplitude A be arranged ' with orthogonal signal Q5.And parameter b is in order to adjust homophase signal I4 and the orthogonal signal Q4 difference of phase place between the two.Amplitude difference parameter a and phase difference parameter b are in order to adjusting the vectorial amplitude of I4, I6, Q4 and Q6, the inphase quadrature addition of vectors after again amplitude being changed and obtain new vector (new amplitude and phase place) and can make homophase signal I5 and orthogonal signal Q5 have identical amplitude and I to take the lead the phase place that Q 90 spends.Therefore, if desire is adjusted to balance with homophase signal I4 and orthogonal signal Q4, above-mentioned steps only need determine one group of a, b value just can make adjusted homophase signal and orthogonal signal balance, must not repeat to approach back and forth balance with recursive mode.In addition, by Fig. 7 and Fig. 9 as can be known, parameter a and b are used for adjusting amplitude difference and phase difference respectively, and meaning is promptly for homophase signal I4 and orthogonal signal Q4, and the adjustment of amplitude difference and the adjustment of phase difference can separate independently and carry out.That is to say, when adjustment homophase signal I4 and orthogonal signal Q4, can adjust phase difference with parameter b again behind the adjustment amplitude difference earlier, can also adjust amplitude difference with parameter a again behind the adjustment phase difference earlier with parameter b with parameter a; When adjusting amplitude difference with parameter a, adjust the behavior of phase difference after can having influence on hardly with parameter b, vice versa.
Please refer to Figure 11.Figure 11 is the partial circuit embodiment of 210,220,230,240 and S1, S2 of Adjustment System 200.Only express among Figure 11 for adjusting homophase signal I4 and part with phase retardation signal I6.And identical with Figure 11 for adjusting orthogonal signal Q4 with the part that quadrature postpones signal Q6, so repeat no more.In Figure 11, homophase signal I4 imports in differential mode, with I4 with
Represent.In like manner, with the phase retardation signal be with I6 with
Represent.
Please continue with reference to Figure 11.Amplitude amplifier 210 comprises a bias generator VDD, two resistance R 1 and R2, two-transistor T1 and T2, an enlargement ratio adjusting module 1110, and wherein resistance R 1 one ends are coupled to bias generator VDD, and the other end is coupled to node N1; Resistance R 2 one ends are coupled to bias generator VDD, and the other end is coupled to node N2; The input of transistor T 1 is in order to input homophase signal I4, and an end is coupled to node N5, and the other end is coupled to node N1; The input of transistor T 2 is in order to input homophase signal
One end is coupled to node N5, and the other end is coupled to node N2; Enlargement ratio adjusting module 1,110 one ends are coupled to node N5, and an end is coupled to ground.Amplitude amplifier 220 comprises a bias generator VDD, two resistance R 3 and R4, two-transistor T3 and T4, an enlargement ratio adjusting module 1120, and wherein resistance R 3 one ends are coupled to bias generator VDD, and the other end is coupled to node N3; Resistance R 4 one ends are coupled to bias generator VDD, and the other end is coupled to node N4; The input of transistor T 3 is in order to input homophase signal I6, and an end is coupled to node N6, and the other end is coupled to node N3; The input of transistor T 4 is in order to input homophase signal
, an end is coupled to node N6, and the other end is coupled to node N4; Enlargement ratio adjusting module 1,120 one ends are coupled to node N6, and an end is coupled to ground.
Please continue with reference to Figure 11.Transistor T 1 receives homophase signal I4, according to the enlargement ratio that enlargement ratio adjusting module 1110 is provided, amplifies homophase signal I4, therefore, at node N1 place, exportable homophase signal I8.In like manner, at node N2 place, exportable homophase signal
Transistor T 3 receives with phase retardation signal I6, according to the enlargement ratio that enlargement ratio adjusting module 1120 is provided, amplifies homophase signal I6, and is therefore, at node N3 place, exportable with phase retardation signal I7.In like manner, at node N4 place, exportable homophase signal
And since node N1 and node N3 couple mutually, therefore, homophase signal I8 with phase retardation signal I7 addition, the function of realization add circuit S1, and draw the homophase signal I5 of last output.In like manner, because node N2 and node N4 couple mutually, therefore, the homophase signal
With with the phase retardation signal
Addition realizes the function of add circuit S1, and draws the homophase signal of last output
Please refer to Figure 12.Figure 12 is the embodiment of enlargement ratio adjusting module 1110.Enlargement ratio module 1110 comprises a current mirror 1210, a plurality of transistor, a plurality of switch S 1-Sn.Current mirror 1210 comprises two-transistor T5, T6, a bias generator VDD and a reference current IREF.One end of transistor T 5 is coupled to reference current IREF, and the other end is coupled to ground.The grid of transistor T 6 is coupled to the grid of transistor T 5, and an end is coupled to ground.Therefore, transistor T 6 can be in node N7 output and the same size of current of reference current IREF.The rest may be inferred, transistor T 7-Tn
+ 6All same exportable and the onesize electric current of reference current IREF.Therefore, if when switch S 1-Sn all opens, all crystals pipe T6-Tn
+ 6Electric current all can flow to node N5, the electric current that this moment, node N5 was flowed through is (N+1) IREF.And if when switch S 1-Sn Close All, transistor T 7-Tn
+ 6Then can't be circulated to node N5, then the electric current that this moment, node N5 was flowed through only is IREF.Therefore, can adjust the size of current of the node N5 that flows through via control switch S1-Sn.Please back with reference to Figure 11, the size of current of the node N5 that flows through, the enlargement ratio of may command transistor T 1 and T2.Therefore, via control switch S1-Sn, the just enlargement ratio of may command transistor T 1 and T2.And parameter a and b are the numbers of these switch opens of control, so adjust homophase signal I8 with
To desired size.
Please refer to Figure 13.Figure 13 is the schematic diagram of second embodiment of Adjustment System 200 of the present invention.As shown in the figure, Adjustment System 200 comprises four-input terminal, two outputs, and wherein two inputs are in order to receive homophase signal I9 and orthogonal signal Q9, two inputs in order to receive parameter a and b, two outputs in order to export adjusted homophase signal I10 and adjusted orthogonal signal Q10.Before process Adjustment System 200, homophase signal I9 is Acos (ω t), and orthogonal signal Q9 is Asin (ω t), and hence one can see that, and homophase signal I4 and orthogonal signal Q4 are balance.And be respectively (1+H) sin (ω t+G+G ') of A ' cos (ω t+G) and A ' adjusting the homophase signal I10 that exported the back and orthogonal signal Q10 through Adjustment System 200, and homophase signal I10 and orthogonal signal Q10 are imbalance.Adjustment System 200 is adjusted homophase signal I9 and orthogonal signal Q9 respectively according to parameter a that is received and b.Hence one can see that, Adjustment System 200 of the present invention, can be according to parameter a that is received and b, adjust the homophase signal and the orthogonal signal that are received, except unbalanced homophase signal and orthogonal signal are adjusted into the balance, also the homophase signal and the orthogonal signal of balance can be adjusted into imbalance, perhaps, unbalanced homophase signal and orthogonal signal be adjusted into another unbalanced homophase signal and orthogonal signal; Aforesaid adjustment will see that all why the parameter a that received and b definition carry out the adjustment behavior.
Please refer to Figure 14.Figure 14 is for connect the schematic diagram of change type transceiver transmission ends 1400 always.Figure 14 can simulate the assembly in Fig. 1, with Fig. 1 something in common, repeats no more in this; Difference only is to have added among Figure 14 Adjustment System 200 of the present invention and vector analysis instrument 1410.One input of Adjustment System 200 is coupled to the output of frequency mixer M1, in order to receive homophase signal I3; One input is coupled to the output of frequency mixer M2, in order to receive orthogonal signal Q3; Two inputs are coupled to two outputs of vector analysis instrument 1410, in order to receive parameter a and b; One output is coupled to the input of frequency mixer M3, in order to export adjusted homophase signal I11 to frequency mixer M3; One output is coupled to the input of add circuit S1, in order to export adjusted orthogonal signal Q11 to add circuit S1.One input of vector analysis instrument 1410 is coupled to the output of frequency mixer M1, in order to receive homophase signal I3; One input is coupled to the output of frequency mixer M2, in order to receive orthogonal signal Q3; Two outputs are coupled to two inputs of Adjustment System 200, in order to a and the b of passing a parameter.Vector analysis instrument 1410 receives homophase signal I3 and orthogonal signal Q3, analyzes the amplitude difference and the phase difference of this two signal, and output parameter a and b are to Adjustment System 200.Adjustment System 200 receives homophase signal I3 and orthogonal signal Q3, according to parameter a that is received and b, adjusts homophase signal I3 and orthogonal signal Q3, gives add circuit S1 with homophase signal I11 and the orthogonal signal Q11 that exports balance.The homophase signal I11 and the orthogonal signal Q11 of the balance that add circuit S1 addition is again received with output signal C1, obtain better communication quality with this.
Please refer to Figure 15.Figure 15 is the schematic diagram of direct change type transceiver transmission ends 1500.Figure 15 can simulate the assembly in Fig. 1, with Fig. 1 something in common, repeats no more in this; Difference only is to have added among Figure 15 Adjustment System 200 of the present invention and vector analysis instrument 1510.One input of Adjustment System 200 is coupled to the output of local oscillator L1, in order to receive homophase signal I2; One input is coupled to the output of delay circuit D1, in order to receive orthogonal signal Q2; Two inputs are coupled to two outputs of vector analysis instrument 1510, in order to receive parameter a and b; One output is coupled to the input of frequency mixer M1, in order to export adjusted homophase signal I12 to frequency mixer M1; One output is coupled to the input of frequency mixer M2, in order to export adjusted orthogonal signal Q12 to frequency mixer M2.One input of vector analysis instrument 1510 is coupled to the output of frequency mixer M1, in order to receive homophase signal I3; One input is coupled to the output of frequency mixer M2, in order to receive orthogonal signal Q3; Two outputs are coupled to two inputs of Adjustment System 200, in order to a and the b of passing a parameter.Vector analysis instrument 1510 receives homophase signal I3 and orthogonal signal Q3, analyzes the amplitude difference and the phase difference of this two signal, and output parameter a and b are to Adjustment System 200.Adjustment System 200 receives homophase signal I2 and orthogonal signal Q2, according to parameter a that is received and b, adjusts homophase signal I2 and orthogonal signal Q2, gives frequency mixer M1 and M2 respectively with output homophase signal I12 and orthogonal signal Q12.Frequency mixer M1 mixing homophase signal I1 and I12 are to produce homophase signal I3.Frequency mixer M2 hybrid orthogonal signal Q1 and Q12 are to produce orthogonal signal Q3.And, can make mixed homophase signal I3 and orthogonal signal Q3 balance via adjusted homophase signal 112 and orthogonal signal Q12, this is the purpose that vector analysis instrument 1510 must be coupled to input this two signals I3 and Q3.The homophase signal I11 and the orthogonal signal Q11 of the balance that add circuit S1 addition is again received with output signal C1, obtain better communication quality with this.
In addition, delay circuit D2 of the present invention and D3 can realize the function of phase retardation with a polyphase quadrature filter (polyphase filter), a frequency mixer (mixer) or a frequency eliminator (frequency divider).
To sum up state, the present invention has not only improved the unbalanced problem of inphase/orthogonal signal, adjustment for phase place and amplitude all can independently be carried out respectively, also must not make controlled signal approach balance with recursive mode, therefore, utilize the present invention, can improve user's convenience, also improved the communication quality of communication system.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (11)
1. method of adjusting inphase/orthogonal signal comprises:
Receive a phase difference signal;
Receive an amplitude difference signal;
Receive one first homophase signal;
Postpone the phase place of this first homophase signal with a predetermined angular, to produce one first with the phase retardation signal;
According to this phase difference signal and this amplitude difference signal, adjust the amplitude of this first homophase signal, to produce one second homophase signal;
According to this phase difference signal and this amplitude difference signal, adjust this first amplitude, to produce one second with the phase retardation signal with the phase retardation signal;
With this second homophase signal and this second with the addition of phase retardation signal, to produce one the 3rd homophase signal;
Export the 3rd homophase signal;
Receive one first orthogonal signal;
Postpone the phase place of this first orthogonal signal with this predetermined angular, postpone signal to produce one first quadrature;
According to this phase difference signal and this amplitude difference signal, adjust the amplitude of this first orthogonal signal, to produce one second orthogonal signal;
According to this phase difference signal and this amplitude difference signal, adjust the amplitude that this first quadrature postpones signal, postpone signal to produce one second quadrature;
This second orthogonal signal and this second quadrature are postponed the signal addition, to produce one the 3rd orthogonal signal; And
Export the 3rd orthogonal signal
2. the method for claim 1 wherein postpones the phase place of this first homophase signal with a predetermined angular, also comprises with the phase retardation signal to produce one first:
This first homophase signal is imported a polyphase quadrature filter, a frequency mixer or a frequency eliminator, to produce one first with the phase retardation signal.
3. the method for claim 1 wherein according to this phase difference signal and this amplitude difference signal, is adjusted the amplitude of this first homophase signal, also comprises to produce this second homophase signal:
This first homophase signal is imported an amplitude amplifier, and to produce this second homophase signal, wherein the enlargement ratio of this amplitude amplifier is controlled by this phase difference signal and this amplitude difference signal.
4. the method for claim 1 wherein according to this phase difference signal and this amplitude difference signal, is adjusted this first amplitude with the phase retardation signal, second also comprises with the phase retardation signal to produce this:
This first is imported an amplitude amplifier with the phase retardation signal, and to produce this second with the phase retardation signal, wherein the enlargement ratio of this amplitude amplifier is controlled by this phase difference signal and this amplitude difference signal.
5. the method for claim 1 wherein postpones the phase place of this first orthogonal signal with a predetermined angular, also comprises to produce one first quadrature delay signal:
This first homophase signal is imported a polyphase quadrature filter, a frequency mixer or a frequency eliminator, to produce one first with the phase retardation signal.
6. the method for claim 1 wherein according to this phase difference signal and this amplitude difference signal, is adjusted the amplitude of this first orthogonal signal, also comprises to produce this second orthogonal signal:
This first orthogonal signal is imported an amplitude amplifier, and to produce this second orthogonal signal, wherein the enlargement ratio of this amplitude amplifier is controlled by this phase difference signal and this amplitude difference signal.
7. the method for claim 1 wherein according to this phase difference signal and this amplitude difference signal, is adjusted the amplitude that this first quadrature postpones signal, also comprises to produce this second quadrature delay signal:
This first quadrature is postponed signal import one second amplitude amplifier, postpone signal to produce this second quadrature, wherein the enlargement ratio of this second amplitude amplifier is controlled by this phase difference signal and this amplitude difference signal.
8. the method for claim 1, wherein receiving this phase difference signal is the signal of accepting this first homophase signal and this first orthogonal signal phase difference.
9. the method for claim 1, wherein receiving this amplitude difference signal is the signal of accepting this first homophase signal and this first orthogonal signal amplitude difference.
10. the method for claim 1 wherein receives this phase difference signal for accepting the signal of a homophase carrier signal and a quadrature carrier signal phase difference.
11. method as claimed in claim 9, wherein receiving this amplitude difference signal is the signal of accepting this homophase carrier signal and this quadrature carrier signal amplitude difference.
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| CNA2006101317048A CN101154958A (en) | 2006-09-29 | 2006-09-29 | Method for adjusting inphase/orthogonal signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110168967A (en) * | 2017-04-24 | 2019-08-23 | 华为技术有限公司 | A kind of photoreceiver and time-delay estimation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110168967A (en) * | 2017-04-24 | 2019-08-23 | 华为技术有限公司 | A kind of photoreceiver and time-delay estimation method |
| CN110168967B (en) * | 2017-04-24 | 2020-12-22 | 华为技术有限公司 | Optical receiver and time delay estimation method |
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