CN103581074B - Compensate the unbalanced method of signal of wireless telecommunication system - Google Patents
Compensate the unbalanced method of signal of wireless telecommunication system Download PDFInfo
- Publication number
- CN103581074B CN103581074B CN201210253998.7A CN201210253998A CN103581074B CN 103581074 B CN103581074 B CN 103581074B CN 201210253998 A CN201210253998 A CN 201210253998A CN 103581074 B CN103581074 B CN 103581074B
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- frequency domain
- parameter
- monotonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Noise Elimination (AREA)
- Superheterodyne Receivers (AREA)
Abstract
The invention discloses a kind of unbalanced method of signal compensating wireless telecommunication system, comprise: the receiving terminal in this wireless telecommunication system receives N number of first monotonic signal and N number of second monotonic signal, produce N number of first frequency domain filter parameter and N number of second frequency domain filter parameter, carry out inverse fast fourier transform conversion, produce 2N time domain filtering parameter；And use the conjugate complex number of this 2N multiple wireless signal of time domain filtering parameter processing, to produce multiple compensation signal, and the plurality of compensation signal is added with the plurality of wireless signal, multiple has been compensated for signal to produce.The present invention uses monotonic signal to be tested to wireless telecommunication system produce filter parameter, when using filter parameter in wave filter, can prevent in wireless telecommunication system because the signal energy imbalance that causes of local oscillator or analog element, and avoid wireless telecommunication system by influence of noise.
Description
Technical field
The invention discloses a kind of unbalanced method of signal compensating wireless telecommunication system, espespecially a kind of at frequency
Territory produces one group of filter parameter that wireless telecommunication system uses, and processes wireless with this group filter parameter
Communication signal produces compensation signal, is referred to as I/Q energy imbalance with a kind of in wireless telecommunication system of preventing
The unbalanced method of signal.
Background technology
Referring to Fig. 1 and Fig. 2, it illustrates the transmitting terminal 110 and that a kind of general communication system comprises
Receiving terminal 120.Transmitting terminal 110 includes digital to analog converter 112 and 132, low pass filter
114 and 134, blender 116 and 136, local oscillator (Local Oscillator) 117, adder 138,
Power amplifier 119 and antenna 118.Receiving terminal 120 includes antenna 128, low-noise amplifier
(Low Noise Amplifier) 149, blender 122 and 142, local oscillator 127, low pass filter
124 and 144, gain controller 126 and 146 and analog-to-digital converter 129 and 148.Antenna
128 are used for receiving the signal launched by antenna 118.Digital to analog converter 112 each connects with 132
Receive orthogonal (Quadrature) part Q and homophase (In-Phase) part I that a signal packet contains, wherein in ideal
Under situation, the phase contrast between quadrature portion Q and homophase part I is 90 degree, namely quadrature portion Q
With the signal that homophase part I is a pair orthogonal (Orthogonal).
In the transmitting terminal 110 shown in Fig. 1, the signal of local oscillator 117 can be mixed into blender 116
In 136, and when becoming process quadrature component Q and homophase part I, quadrature component Q and homophase part
The unbalanced main source of I signal between the two (alternatively referred to as I/Q is uneven, I/Q Imbalance).By this
The I/Q imbalance that the signal of ground agitator 117 causes mainly can cause quadrature component Q and homophase part
Phase contrast between I cannot be formed preferable 90 degree orthogonal and interfere with each other.Separately, in receiving terminal 120,
Also local oscillator 127 can be occurred to be mixed into blender 122 and 124 and cause quadrature portion Q and homophase portion
The I/Q energy imbalance of part I, I/Q energy imbalance the most described herein is unrelated with frequency.
Another is present in transmitting terminal 110 and the I/Q energy imbalance of receiving terminal 120 and frequency dependence,
Its analog element comprised by transmitting terminal 110 and receiving terminal 120 itself does not match each other caused, such as
Low pass filter, analog-to-digital converter or digital to analog converter etc..
Referring to Fig. 3, it is in the receiving terminal 120 shown in the transmitting terminal 110 and Fig. 2 shown in Fig. 1
The unbalanced generalized schematic of produced I/Q, wherein Fig. 3 is to represent with frequency domain.As it is shown on figure 3,
The frequency assuming the signal that transmitting terminal 110 exported is fRF1=fLo+fm1With fRF2=fLo+fm2, wherein
Frequency fLoFor the frequency of local oscillator, then in transmitting terminal 110, except being positioned at fRF1With fRF2Letter
Number part Sm1With Sm2In addition, meeting because of the quadrature component in signal and is just not between homophase part
(namely I/Q energy imbalance) is handed over to produce and be positioned at frequency f as shown in Figure 3Lo-fm1With fLo-fm2's
Mirror image part Im1With Im2.It addition, when receiving terminal 120 receives by transmitting terminal 110 through antenna 128
And come with frequency fRF1=fLo+fm1With fRF2=fLo+fm2Signal time, due to local oscillator 127
Also bringing along the impact of I/Q energy imbalance, receiving terminal 120 can produce four and sequentially comprise frequency fm1、
fm2、-fm1、-fm2Phase xor signal, its medium frequency is fm1With fm2Signal be the letter in receiving terminal 120
Number part, and frequency is-fm1With-fm2Signal be in receiving terminal 120 mirror image part.If can send
End 110 will be located in frequency fLo-fm1With fLo-fm2Mirror image part Im1With Im2Remove, and will receive
End 120 is positioned at frequency-fm1With-fm2Mirror image part Im1' and Im2' remove, even if also transmitting terminal 110
Keep orthogonal with the quadrature component in receiving terminal 120 signal each other with homophase part and do not interfere with each other, then
The noise that transmitting terminal 110 of can preventing brings with I/Q imbalance in receiving terminal 120.
Summary of the invention
For solving the problems referred to above of the prior art, the invention discloses that a kind of compensation in wireless telecommunication system connects
The unbalanced method of receiver signal.
In the compensation wireless telecommunication system of the present invention, the unbalanced method of receiving end signal, is contained in this wireless
The receiving terminal of communication system receives the N number of first dull (Single tone) signal and N number of second monotonic signal；
This N number of first dull (Single tone) signal is single to produce this n-th one by time domain conversion to frequency domain
Adjust each self-contained one first signal parameter of signal and one first mirror image (Image) parameter；For each
One monotonic signal, by the conjugate complex number of this first signal parameter divided by this first image parameter, to produce N
Individual first frequency domain filter parameter；Should to produce by time domain conversion to frequency domain by this N number of second monotonic signal
N number of second each self-contained secondary signal parameter of monotonic signal and one second image parameter；For each
Second monotonic signal, by the conjugate complex number of this secondary signal parameter divided by this second image parameter, to produce
N number of second frequency domain filter parameter；To this N number of first frequency domain filter parameter and this N number of second frequency domain
Filter parameter carries out inverse fast fourier transform conversion (Inverse Fast Fourier Transform, IFFT),
To produce 2N time domain filtering parameter；And use this 2N multiple nothing of time domain filtering parameter processing
The conjugate complex number of line signal, to produce multiple compensation signal, and by the plurality of compensation signal and the plurality of nothing
Line signal is added, and multiple has been compensated for signal to produce.The frequency diverse of this N number of first monotonic signal.Should
The frequency diverse of N number of second monotonic signal.Each first monotonic signal has the second dull letter of a correspondence
Number, and the frequency of this first monotonic signal and a local side frequency of oscillation (Local Oscillating
Frequency) difference is equal to the difference of this local side frequency of oscillation and the frequency of this second monotonic signal.
For solving the problems referred to above of the prior art, the present invention separately discloses a kind of compensation in wireless telecommunication system
The unbalanced method of transmitting terminal signal.
The unbalanced method of transmitting terminal signal in the compensation wireless telecommunication system of the present invention, comprises input N number of
First monotonic signal and N number of second monotonic signal are in the transmitting terminal of this wireless telecommunication system；This is N number of
First monotonic signal and this N number of second monotonic signal are input into a passive mixer (Passive Mixer),
To produce N number of the first mixed signal corresponding to the plurality of first monotonic signal with N number of corresponding to institute
State the second mixed signal of multiple second monotonic signal；According to this each first mixed signal multiple first
Corresponding the first signal minimum corresponding to first frequency of in frequency-domain frequency one, determines one first orthogonal frequency
Territory filter parameter and one first homophase frequency domain filter parameter, to produce N number of first frequency domain filter ginseng
Number；According to this each second mixed signal in multiple second frequencies corresponding to a corresponding second frequency the
Binary signal minima, determines one second orthogonal frequency domain filter parameter and one second homophase frequency domain filter ginseng
Number, to produce N number of second frequency domain filter parameter；By this N number of first frequency domain filter parameter and this N
Individual second frequency domain filter parameter carries out inverse fast fourier transform conversion, to produce 2N time domain filtering
Parameter；And use the conjugate complex number of this 2N multiple wireless signal of time domain filtering parameter processing, to produce
Raw multiple compensation signals, and the plurality of compensation signal is added with the plurality of wireless signal, multiple to produce
Have been compensated for signal.The frequency diverse of this N number of first monotonic signal.The frequency of this N number of second monotonic signal
Rate is different.Each first monotonic signal has the second monotonic signal of a correspondence.This first monotonic signal
Frequency with this second monotonic signal and be zero.Each first frequency-domain frequency system is this each first dullness
Two times of the frequency of signal.Each second frequency-domain frequency is two times of this each second monotonic signal.
The present invention use monotonic signal wireless telecommunication system is tested to produce filter parameter, when
When wave filter uses filter parameter, because of local oscillator or simulation in wireless telecommunication system of can preventing
The signal energy imbalance that element causes, and avoid wireless telecommunication system by influence of noise.
Accompanying drawing explanation
Fig. 1 with Fig. 2 illustrates a transmitting terminal and the receiving terminal that a kind of general communication system comprises.
Fig. 3 is unbalanced by being produced signal in the transmitting terminal shown in Fig. 1 with the receiving terminal shown in Fig. 2
Schematic diagram.
Fig. 4 with Fig. 5 is to apply at receiving terminal compensating test disclosed by one embodiment of the invention
Wireless signal when monotonic signal or actual application, and the outline of the unbalanced method of the I/Q that prevents implements to show
It is intended to.
After Fig. 6 illustrates enforcement method shown in Fig. 5, the homophase part being initially positioned at negative frequency-domain frequency can quilt
Compensation signal cancellation is fallen, and remains the simple schematic diagram of the quadrature component being positioned at positive frequency-domain frequency.
Fig. 7 Yu Fig. 8 uses with compensating test at transmitting terminal for applying disclosed by one embodiment of the invention
Monotonic signal or wireless signal during actual application, and the outline of the unbalanced method of signal of preventing implements
Schematic diagram.
Fig. 9 is for according in step 804 and 806 shown in Fig. 8 disclosed by one embodiment of the invention, determining
Multiple the first frequency domain filter parameters corresponding to positive frequency-domain frequency and multiple corresponding to bear frequency-domain frequency
The decision flow chart of the second frequency domain filter parameter.
Wherein, description of reference numerals is as follows:
110,210: transmitting terminal
120,220: receiving terminal
112,132,212,232: digital to analog converter
114,134,124,144,224,244,214,234,265: low pass filter
116,136,122,142,222,242,216,236,264: blender
117,127,227: local oscillator
118,128,228,218: antenna
119,219: power amplifier
126,146,226,246: gain controller
138,252,254,261,262,238: adder
149,249: low-noise amplifier
129,148,229,248,266: analog-to-digital converter
250,260: filtration module
502、504、506、508、510、512、514、802、803、804、806、808、810、
302,304,306,308,310,312,314,316,318,320,322: step
Detailed description of the invention
In order to solve above-mentioned referred to as I/Q unbalanced signal imbalance problem, the invention discloses a kind of sending out
Sending end compensates the unbalanced method of I/Q, and discloses a kind of in the receiving terminal compensation unbalanced method of I/Q,
With the I/Q imbalance in wireless telecommunication system of preventing.Disclosed herein the compensation unbalanced method of I/Q,
Input monotonic signal is tested to transmitting terminal or receiving terminal the most in advance, can be used to compensate to find out
The unbalanced one group of time domain filtering parameter of I/Q；Finally in wave filter, use this group time domain filtering
Parameter, (is not limited to dull letter processing the follow-up all kinds wireless signal being input into transmitting terminal or receiving terminal
Number), and in the plurality of wireless signal of preventing, I/Q between quadrature component and homophase part is uneven.
Referring to Fig. 4, it compensates at receiving terminal 220 for applying disclosed by one embodiment of the invention
Schematic diagram implemented in the outline of the unbalanced method of I/Q.As shown in Figure 4, receiving terminal 220 comprises an antenna
228, a low-noise amplifier 249, blender 222 and 242, one local oscillator 227, low pass filtered
Ripple device 224 with 244, gain controller 226 with 246, analog-to-digital converter 229 with 248, add
Musical instruments used in a Buddhist or Taoist mass 252 and 254 and a filtration module 250, the method that wherein disclosed herein is by defeated
Enter monotonic signal to test, to adjust one group of filter coefficient that filtration module 250 is used.Filtering mould
Block 250 can use this group filter coefficient to process the conjugate complex number of follow-up received various wireless signals
Signal, compensates signal, the most again by this wireless signal of this compensation signal and receipt of subsequent in adding to produce
Musical instruments used in a Buddhist or Taoist mass 252 is added, uneven with the I/Q prevented in this wireless signal.
Disclosed herein that the receiving terminal at wireless telecommunication system produces filter coefficient to produce compensation letter
Number method as it is shown in figure 5, wherein filtration module 250 apply the method produce filter coefficient.The party
Method comprises:
Step 502: receive N number of first monotonic signal and N number of second monotonic signal in receiving terminal 220,
The wherein frequency diverse of this N number of first monotonic signal, the frequency diverse of this N number of second monotonic signal,
Each first monotonic signal has the second monotonic signal of a correspondence, and the frequency of this first monotonic signal with
The difference of one local side frequency of oscillation is equal to the frequency of this local side frequency of oscillation and this second monotonic signal
Difference；
Step 504: by this N number of first monotonic signal by time domain conversion to frequency domain with produce this N number of first
Each self-contained first signal parameter of monotonic signal and the first image parameter；
Step 506: for each first monotonic signal, by the conjugate complex number of this first signal parameter divided by
This first image parameter, to produce N number of first frequency domain filter parameter；
Step 508: by this N number of second monotonic signal by time domain conversion to frequency domain with produce this N number of second
The each self-contained secondary signal parameter of monotonic signal and the second image parameter；
Step 510: for each second monotonic signal, by the conjugate complex number of this secondary signal parameter divided by
This second image parameter, to produce N number of second frequency domain filter parameter；
Step 512: to this N number of first frequency domain filter parameter and this N number of second frequency domain filter parameter
Carry out inverse fast fourier transform conversion, to produce 2N time domain filtering parameter；
Step 514: use the conjugate complex number of this 2N multiple wireless signal of time domain filtering parameter processing,
To produce multiple compensation signals, and the plurality of compensation signal is added with the plurality of wireless signal, to produce
Multiple have been compensated for signal.
Method shown in Fig. 5 is explained further as follows.The most in step 502, receiving terminal 220 can connect
Receive N number of (wherein N is positive integer) the first monotonic signal and N wirelessly exported by transmitting terminal 210
Individual second monotonic signal.This N number of first monotonic signal is to test with this N number of second monotonic signal
Go out and be input into receiving terminal corresponding to compensating the filter parameter of signal, and can be the most defeated when reality is applied
Enter other kinds of wireless signal.The temporal frequency of this N number of first monotonic signal is (fLO+fm1)、
(fLO+fm2)、(fLO+fm3)、…、(fLO+fmN), and the temporal frequency of this N number of second monotonic signal is
(fLO-fm1)、(fLO-fm2)、(fLO-fm3)、…、(fLO-fmN), wherein fLO system is local oscillator
Temporal frequency, frequency fm1、fm2、fm3、…、fmNThe most different.This N number of first monotonic signal and this N
Individual second monotonic signal one_to_one corresponding, such as temporal frequency is (fLO+fm1) the first monotonic signal correspond to
Temporal frequency is (fLO-fm1) the second monotonic signal.
In step 504 and 508, this N number of first monotonic signal and this N number of second monotonic signal meeting
It is converted to frequency domain, to obtain the signal of this N number of first monotonic signal and this N number of second monotonic signal
Parameter and image parameter.When carrying out subsequent treatment in a frequency domain, the frequency meeting of this N number of first monotonic signal
It is treated as frequency-domain frequency fm1、fm2、fm3、…、fmN, the frequency of this N number of second monotonic signal can be worked as
Become frequency-domain frequency-fm1、-fm2、-fm3、…、-fmN。
In step 506 with step 510, the conjugate complex number of the signal parameter of this N number of first monotonic signal
(Complex Conjugate) can be divided by the mirror image part of this N number of first monotonic signal, N number of to produce
First frequency domain filter parameter W1、W2、W3、…、WN；The signal of this N number of second monotonic signal
The conjugate complex number of parameter can be divided by the mirror image part of this N number of second monotonic signal, to produce N number of the
Two frequency domain filter parameters W-1、W-2、W-3、…、W-N。
In step 512, N number of first frequency domain filter parameter W1、W2、W3、…、WNAnd N
Individual second frequency domain filter parameter W-1、W-2、W-3、…、W-NThe most quickly Fourier will be carried out
Leaf is changed and is transformed into time domain (Time Domain) by frequency domain, to obtain 2N time domain filtering parameter.
In the step 514, this 2N time domain filtering parameter can be made for processing by filtration module 250
The conjugate complex number of follow-up received multiple wireless signals (being not limited to monotonic signal), so that filtration module
250 can produce multiple compensation signal according to this, and wherein filtration module 250 can also comprise a conjugate module, with
The conjugate complex number of its correspondence is produced according to the plurality of wireless signal.Adder 252 is used for the plurality of benefit
Repay signal to be added with the plurality of wireless signal, to offset in the plurality of wireless signal because quadrature portion with
Homophase part is the most non-orthogonal and the I/Q imbalance noise that produces, and corresponding generation multiple has been compensated for signal
It is used as the output signal of receiving terminal 220.
In the step disclosed by Fig. 5, shown in Fig. 3, it is positioned at frequency-domain frequency-fm1Or-fm2Mirror image part meeting
Fallen by above-mentioned compensation signal cancellation, and remain the signal part in original wireless signal, therefore can make
Quadrature portion in wireless signal will not be interfering with each other with homophase part, and has prevented in original wireless signal
I/Q energy imbalance.Refer to Fig. 6, after it implements the method shown in Fig. 5 for diagram, Yuan Xianwei
In frequency-domain frequency-fmMirror image part ImSignal cancellation can be compensated fall, and remain and be positioned at frequency-domain frequency
fmSignal part SmSimple schematic diagram.
Referring to Fig. 7, it is for applying at transmitting terminal 210 to mend disclosed by one embodiment of the invention
Schematic diagram implemented in the outline repaying the unbalanced method of I/Q, and wherein monotonic signal can be input into transmitting terminal 210
Test, to produce one group of corresponding filter parameter, and by using this group filter parameter to prevent
I/Q energy imbalance in the wireless signal of receipt of subsequent.Add as it is shown in fig. 7, transmitting terminal 210 comprises
Musical instruments used in a Buddhist or Taoist mass 261,262,238, one filtration module 260, digital to analog converter 212 and 232, low pass
Wave filter 214,234,265, blender 216,236,264, power amplifier (Power
Amplifier) 219, one antenna 218 and an analog-to-digital converter 266.Filtration module 260 is used for
According to the quadrature portion Q in monotonic signal and homophase part I and from analog to number in test process
The digital signal that word transducer 266 is fed back determines one group of filter parameter, with the nothing at receipt of subsequent
Line signal (being not limited to monotonic signal) compensates on blender 216 and 236 before entering transmitting terminal 210 the most in advance
Cause because of being mixed into non-orthogonal between the caused quadrature portion of local oscillator signals and homophase part
I/Q energy imbalance.Wherein blender 264 can be considered a passive mixer (Passive Mixer).
In the figure 7, the homophase part I of signal is had been compensated for1Digital to analog converter 212 can be transferred to,
And have been compensated for the quadrature component Q of signal1Digital to analog converter 232 can be transferred to.It is input into mixing
The signal I of device 216LOFor the quadrature component of local oscillator signals, and it is mixed in the letter of blender 236
Number QLOHomophase part for local oscillator signals.
Referring to Fig. 8, it is for according to transmission at wireless telecommunication system disclosed by one embodiment of the invention
End produces filter coefficient, to compensate the general flowchart of the unbalanced method of I/Q.As shown in Figure 8,
The method comprises:
Step 802: receive N number of first monotonic signal and N number of second monotonic signal in transmitting terminal 210,
The wherein frequency diverse of this N number of first monotonic signal, the frequency diverse of this N number of second monotonic signal,
Each first monotonic signal has the second monotonic signal of a correspondence, and the frequency of this first monotonic signal with
The difference of one local side frequency of oscillation is equal to the frequency of this local side frequency of oscillation and this second monotonic signal
Difference；
Step 803: this N number of first monotonic signal and this N number of second monotonic signal are input into one passive
Blender (Passive Mixer), with produce N number of corresponding to the plurality of first monotonic signal first mix
Close signal and N number of the second mixed signal corresponding to the plurality of second monotonic signal；
Step 804: according to this each first mixed signal correspondence in multiple first frequency-domain frequency
The first signal minimum corresponding to one frequency-domain frequency, determines one first orthogonal frequency domain filter parameter and
First homophase frequency domain filter parameter, to produce N number of first frequency domain filter parameter, each first frequency domain
Frequency system is two times of the frequency of this each first monotonic signal；
Step 806: according to this each second mixed signal correspondence in multiple second frequency-domain frequency
Secondary signal minima corresponding to two frequency-domain frequency, determines one second orthogonal frequency domain filter parameter and
Second homophase frequency domain filter parameter, to produce N number of second frequency domain filter parameter, each second frequency domain
Frequency system is two times of the frequency of this each second monotonic signal；
Step 808: by this N number of first frequency domain filter parameter and this N number of second frequency domain filter parameter
Carry out inverse fast fourier transform conversion, to produce 2N time domain filtering parameter；
Step 810: use the conjugate complex number of this 2N multiple wireless signal of time domain filtering parameter processing,
To produce multiple compensation signals, and the plurality of compensation signal is added with the plurality of wireless signal, to produce
Multiple have been compensated for signal.
Example explanation below step shown in Fig. 8.The most in step 802, transmitting terminal 210 can connect
Receive N number of first monotonic signal and N number of second monotonic signal, wherein this N number of first monotonic signal time
Territory frequency is fm1、fm2、fm3、…、fmN, and the temporal frequency of this N number of second monotonic signal is-fm1、
-fm2、-fm3、…、-fmN.This N number of first monotonic signal and this N number of second monotonic signal be in order to
Test out and be input into transmitting terminal 210 corresponding to compensating the filter parameter of signal, and apply in reality
Shi Kezai inputs other kinds of wireless signal.
Then in step 803, the plurality of first monotonic signal and the plurality of second monotonic signal meeting
Handled by passive mixer 264, and produce N number of corresponding to the first of the plurality of first monotonic signal
Mixed signal and N number of the second mixed signal corresponding to the plurality of second monotonic signal, wherein this N
Individual first mixed signal is positioned at this N number of first monotonic signal (this reception on respective reception feedback path
Feedback path is including at least passive mixer 264, low pass filter 265 and analog-to-digital converter
266, therefore observable learns that this N number of first mixed signal is at the signal intensity corresponding to frequency domain), and this N
Individual second mixed signal is positioned at this N number of second monotonic signal on respective reception feedback path (ibid).
In step 804 and step 806, filtration module 260 can observe through passive mixer 264,
This of feedback path of receiving of low pass filter 265 and analog-to-digital converter 266 N number of first mixes
Close the frequency domain part of signal, to determine N number of first frequency domain filter parameter WW1、WW2、
WW3、…、WWN, and determine N number of for this N number of second mixed signal in the same way
Two frequency domain filter parameters WW-1、WW-2、WW-3、…、WW-N.Wherein this N number of first frequency domain
Filter parameter WW1、WW2、WW3、…、WWNHave to comply with this N number of first mixed signal
Two times of frequency-domain frequency (namely 2f at corresponding first frequencym) condition that signal is a signal minimum at place,
And this N number of second frequency domain filter parameter WW-1、WW-2、WW-3、…、WW-NHave to comply with this
N number of second mixed signal is at negative two times of frequency-domain frequency (namely-2f of corresponding first frequencym) place signal tool
There is the condition of a signal minimum.
With the concrete practice for example, when determining that temporal frequency is fm1The first corresponding monotonic signal institute
The first frequency domain filter parameter WW used1Time, the first frequency domain filter parameter WW1Have to comply with this
First mixed signal is at frequency-domain frequency 2fm1The condition that signal is a signal minimum；In like manner, decision is worked as
There is temporal frequency-fm1The second orthogonal frequency domain filter parameter WW of being used of the second monotonic signal-1
Time, the second frequency domain filter parameter WW-1Have to comply with this second mixed signal at frequency-domain frequency-2fm1's
Signal is the condition of a signal minimum.The method looking for this signal minimum will be taken off the most separately
Reveal its step.
The most in step 808, filtration module 260 can be to this N number of first frequency domain filter parameter WW1、
WW2、WW3、…、WWNAnd this N number of second frequency domain filter parameter WW-1、WW-2、WW-3、…、
WW-NCarry out inverse fast fourier transform conversion, produce 2N time domain filtering parameter with correspondence.In step
In 810, filtration module 260 will use this 2N time domain filtering parameter to process receipt of subsequent
The conjugate complex number of multiple wireless signals (being not limited to monotonic signal) and produce multiple compensation signal, with in addition
The plurality of compensation signal is added the plurality of wireless signal by device 262, prevents in the plurality of wireless signal
Non-orthogonal and the I/Q energy imbalance that produces between quadrature portion and homophase part.
Referring to Fig. 9, it is for according to step 804 and 806 shown in Fig. 8 disclosed by one embodiment of the invention
In, determine this N number of first signal frequency domain filter parameter WW1、WW2、WW3、…、WWN
And this N number of secondary signal frequency domain filter parameter WW-1、WW-2、WW-3、…、WW-NJudgement
Flow chart.This judgment mode mainly adjusts many bats (Tap) of mixed signal in the way of step by step modulating, with
Make these many bats towards making the mixed signal of its correspondence at frequency-domain frequency 2fmOr-2fmSignal be becoming of successively decreasing
Gesture is generated.Consequently, it is possible to these many bats just can be found out so that it is the mixed signal of corresponding generation is at frequency domain
Frequency 2fmOr-2fmOn signal value be minimum, and with the quadrature component of this mixed signal as this mixing
Orthogonal frequency domain filter parameter that the monotonic signal that signal is corresponding is used, with the homophase part of this bat as
The homophase frequency domain filter parameter that monotonic signal corresponding to this mixed signal is used.This orthogonal frequency domain is filtered
Ripple device parameter and this homophase frequency domain filter parameter altogether, are step in the way of plural number (Complex)
The first frequency domain filter parameter described in 804 or the second frequency domain filter parameter described in step 806.
In the flow process of above-mentioned step by step modulating, can progressively adjust the stepping sign corresponding to quadrature portion
Sign_WQm and stepping sign Sign_WIm corresponding to homophase part, wherein stepping sign
Sign_WQm Yu Sign_WIm all corresponds to monotonic signal or the wireless signal that frequency-domain frequency is fm.
Stepping sign Sign_WQm can be multiplied with a stepping quadrature value Step_WQm and become a first step
Inlet signal positive and negative values, stepping sign Sign_WIm can be multiplied with stepping in-phase value Step_WIm and
Become a second step inlet signal positive and negative values.The when of producing a new bat every time, will be with old bat plus being somebody's turn to do
First step inlet signal positive and negative values (namely quadrature portion) or this second step inlet signal positive and negative values (namely homophase portion
Part) mode produce new bat.
As shown in Figure 9, to comprise step as follows for above-mentioned judgment mode:
Step 302: the preset value of stepping sign Sign_WQm Yu Sign_WIm is all set to 1 (i.e.
For positive sign)；
Step 304: clap at frequency-domain frequency 2f before comparing the one of this adjacent bat of monotonic signal twomThe signal at place
Clap at frequency-domain frequency 2f after intensity E (n-3) and the one of this two adjacent batmThe signal intensity E's (n-2) at place is big
Little, currently clap at frequency-domain frequency 2fmThe signal intensity E (n-3) at place is less than rear bat at frequency-domain frequency 2fmPlace
During signal intensity E (n-2), perform step 306；Otherwise, currently clap at frequency-domain frequency 2fmThe signal at place is strong
Degree E (n-3) is not less than rear bat at frequency-domain frequency 2fmDuring signal intensity E (n-2) located, perform step 308；
Step 306: change the value of stepping sign Sign_WIm；
Step 308: homophase frequency domain filter parameter WIm (n-2) clapped after representing is positive and negative plus stepping
The product of number Sign_WIm and stepping in-phase value Step_WIm, newly claps producing one, and this new bat represents
Homophase frequency domain filter parameter be WIm (n)；
Step 310: the value of n is incremented by；
Step 312: compare the front bat of two adjacent bats at frequency-domain frequency 2fmPlace signal intensity E (n-3) with
Rear bat is at frequency-domain frequency 2fmThe size of the signal intensity E (n-2) at place, currently claps at frequency-domain frequency 2fmPlace
Signal intensity E (n-3) is less than rear bat at frequency-domain frequency 2fmDuring signal intensity E (n-2) located, perform step
314；Otherwise, currently clap at frequency-domain frequency 2fmThe signal intensity E (n-3) at place is not less than rear bat at frequency domain frequently
Rate 2fmDuring signal intensity E (n-2) located, perform step 316；
Step 314: change the value of stepping sign Sign_QIm；
Step 316: orthogonal frequency domain filter parameter WQm (n-2) clapped after representing is positive and negative plus stepping
The product of number Sign_WQm and stepping in-phase value Step_WQm, newly claps producing one, this new bat generation
The homophase frequency domain filter system of parameters of table is WQm (n)；
Step 318: the value of n is incremented by；
Step 320: judge that the value of n is the most more than a marginal value；When the value of n is more than this marginal value
Time, perform step 322, otherwise perform step 304；
Step 322: step terminates.
Shown in Fig. 9, step will be explained as follows.Step 304,306,308 be step by step modulating homophase frequency domain filter
The process of ripple device parameter WIm, and step 312,314,316 be step by step modulating orthogonal frequency domain wave filter
The process of parameter QIm.In another embodiment of the invention, step 304,306,308 can be with step
312,314,316 exchange, adjust orthogonal frequency domain again with first Row sum-equal matrix homophase frequency domain filter parameter WIm
Filter parameter WQm.
Stepping sign Sign_WQm can be 1 or-1 with the value of Sign_WIm, wherein positive and negative when stepping
Number value when being 1, i.e. represent step by step modulating homophase frequency domain filter parameter WIm or orthogonal frequency domain at that time
The direction of filter parameter WQm is incremental；Otherwise, when the value of stepping sign is-1, i.e. represent
Step by step modulating homophase frequency domain filter parameter WIm or the side of orthogonal frequency domain filter parameter WQm at that time
To for successively decreasing.So, in step 302, stepping sign Sign_WQm is pre-with Sign_WIm's
If value is all set to 1, imply that step by step modulating homophase frequency domain filter parameter WIm and orthogonal frequency domain wave filter
The direction of parameter WQm is all preset as being incremented by.But, in other embodiments of the invention, stepping is just
The preset value of negative sign Sign_WQm Yu Sign_WIm can be the combination in any of 1 and-1, and not by step
Restriction shown in 302.
In step 304 and 312, two adjacent bats of mixed signal are at frequency-domain frequency 2fmOr-2fmPlace
Signal intensity E (n-3) and E (n-2) can be compared, wherein signal intensity E (n-3) and E (n-2) i.e. represent right
The degree number that in the monotonic signal answered, quadrature portion is the most non-orthogonal with homophase part.Step 304 is ratio
Relatively signal intensity E (n-3) and E (n-2) is at frequency-domain frequency 2fmOr-2fmThe signal intensity at place, and step 312
It is comparison signal intensity E (n-3) with E (n-2) at frequency-domain frequency 2fmOr-2fmThe signal intensity at place.Due to
Through the place of analog-to-digital converter 266 when filtration module 260 receives above-mentioned mixed signal
Reason, therefore can observe directly the mixed signal signal intensity at each frequency-domain frequency, with carry out step 304 with
Described in 312 relatively and confirm the degree of strength of above-mentioned non-orthogonal phenomenon.
In step 304 or 312, when signal intensity E (n-3) is less than E (n-2), i.e. represent the most same
Phase frequency domain filter parameter WIm or orthogonal frequency domain filter parameter WQm so that monotonic signal orthogonal/
The trend that between homophase part, non-orthogonal phenomenon strengthens is generated, it is therefore desirable to as shown in step 306 or 314
Change stepping sign, (namely weaken to weaken above-mentioned non-orthogonal phenomenon changing the trend of step by step modulating
Above-mentioned signal intensity).In step 304 or 312, if signal intensity E (n-3) is not less than E (n-2),
Then represent current homophase frequency domain filter parameter WIm or orthogonal frequency domain filter parameter WQm so that list
Adjust the trend that between the orthogonal/homophase part of signal, non-orthogonal phenomenon weakens to be generated, therefore need not adjust the most separately
Synchronizing enters sign to change the trend of step by step modulating.
Consequently, it is possible in step 308 and 316, can time preceding two adjacent bats when determining
Between posterior one mode newly clapped, produce the homophase frequency domain filter progressively making above-mentioned non-orthogonal phenomenon weaken
Parameter WIm or orthogonal frequency domain filter parameter WQm.Step 310 is used for making above-mentioned stepping adjust with 318
Whole step is able to the mode of iteration (Iterative), and step 320 is used to guarantee above-mentioned step by step modulating
Step is able within the regular hour terminate, therefore the marginal value mentioned in step 320 can be along with stepping
Adjustment programme upon execution between demand in length and be updated.
When going to step 322, make homophase frequency domain filter parameter WIm that non-orthogonal phenomenon is the most weak
Or orthogonal frequency domain filter parameter WQm is usually found in last bat (such as n-th claps) or it is neighbouring
Clap (such as (n-1) claps), therefore preferable first frequency domain filtering can be found out in step 804 and 806 with regard to this
Device parameter and the second frequency domain filter parameter, and in afterwards by this N number of first frequency domain filter parameter with should
N number of second frequency domain filter parameter, carries out inverse fast fourier transform conversion, to produce 2N time domain filter
Ripple device parameter, the I/Q that when monotonic signal of test of preventing or actual application, wireless signal is introduced is not
Equilibrium appearance.
The invention discloses that one transmitting terminal in wireless telecommunication system compensates with receiving terminal, to prevent
Wireless signal because not matched each other impact by local oscillator in wireless telecommunication system or analog element,
(I/Q is or not the signal energy imbalance causing quadrature portion in wireless signal non-orthogonal with homophase part and to produce
Equilibrium appearance) caused by noise.
The foregoing is only embodiments of the invention, all impartial changes done according to scope of the present invention patent
Change and modify, all should belong to the covering scope of the present invention.
Claims (9)
1. one kind compensates the unbalanced method of signal in wireless telecommunication system, it is characterised in that comprise:
Receiving terminal in this wireless telecommunication system receives N number of first monotonic signal and the N number of second dull letter
Number, the frequency diverse of this N number of first monotonic signal, the frequency diverse of this N number of second monotonic signal, often
One first monotonic signal has the second monotonic signal of a correspondence, and the frequency of this first monotonic signal and
The difference of local side frequency of oscillation is equal to this local side frequency of oscillation frequency with this second monotonic signal
Difference, wherein N is positive integer；
This N number of first monotonic signal is each to produce this N number of first monotonic signal to frequency domain by time domain conversion
Self-contained one first signal parameter and one first image parameter；
For each first monotonic signal, by the conjugate complex number of this first signal parameter divided by this first mirror image
Parameter, to produce N number of first frequency domain filter parameter；
This N number of second monotonic signal is each to produce this N number of second monotonic signal to frequency domain by time domain conversion
A self-contained secondary signal parameter and one second image parameter；
For each second monotonic signal, by the conjugate complex number of this secondary signal parameter divided by this second mirror image
Parameter, to produce N number of second frequency domain filter parameter；
This N number of first frequency domain filter parameter and this N number of second frequency domain filter parameter are carried out the fastest
Speed fourier transform, to produce 2N time domain filtering parameter；And
Use the conjugate complex number of this 2N multiple wireless signal of time domain filtering parameter processing, many to produce
Individual compensation signal, and being added with the plurality of wireless signal by the plurality of compensation signal, multiple mends to produce
Repay signal.
2. the method for claim 1, it is characterised in that also comprise:
This N number of first monotonic signal and this N number of second dull letter is exported by the transmitting terminal that this receiving terminal is corresponding
Number to this receiving terminal.
3. one kind compensates the unbalanced method of transmitting terminal signal in wireless telecommunication system, it is characterised in that bag
Contain:
Input N number of first monotonic signal and N number of second monotonic signal in the transmission of this wireless telecommunication system
End, the frequency diverse of this N number of first monotonic signal, the frequency diverse of this N number of second monotonic signal, often
One first monotonic signal has the second monotonic signal of a correspondence, and the frequency of this first monotonic signal with should
The frequency of the second monotonic signal and be zero, wherein N is positive integer；
This N number of first monotonic signal and this N number of second monotonic signal are input into a passive mixer, with
Produce N number of the first mixed signal corresponding to described N number of first monotonic signal with N number of corresponding to described N
Second mixed signal of individual second monotonic signal；
According to this each first mixed signal, the corresponding first frequency institute in multiple first frequency-domain frequency is right
The first signal minimum answered, determines one first orthogonal frequency domain filter parameter and the filter of one first homophase frequency domain
Ripple device parameter, to produce N number of first frequency domain filter parameter, each first frequency-domain frequency be this each
Two times of the frequency of one monotonic signal；
According to this each second mixed signal in multiple second frequency-domain frequency corresponding to a corresponding second frequency
Secondary signal minima, determine one second orthogonal frequency domain filter parameter and one second homophase frequency domain filtering
Device parameter, to produce N number of second frequency domain filter parameter, each second frequency-domain frequency be this each second
Two times of the frequency of monotonic signal；
This N number of first frequency domain filter parameter and this N number of second frequency domain filter parameter are carried out the fastest
Speed fourier transform, to produce 2N time domain filtering parameter；And
Use the conjugate complex number of this 2N multiple wireless signal of time domain filtering parameter processing, many to produce
Individual compensation signal, and being added with the plurality of wireless signal by the plurality of compensation signal, multiple mends to produce
Repay signal.
4. method as claimed in claim 3, it is characterised in that also comprise:
This each first mixed signal is set to this first letter in the minima of this corresponding the first frequency-domain frequency
Number minima；And
This each second mixed signal is set to this second letter in the minima of this corresponding the second frequency-domain frequency
Number minima.
5. method as claimed in claim 4, it is characterised in that by this each first mixed signal right
The minima of this first frequency-domain frequency answered is set to this first signal minimum and comprises:
Iteration compares the two adjacent bats letter at this corresponding the first frequency-domain frequency of this each first mixed signal
Number value, and finds out this first signal minimum according to being iterated result of the comparison；And
Wherein by this each second mixed signal the minima of this corresponding the second frequency-domain frequency be set to this
Binary signal minima comprises:
Iteration compares the two adjacent bats letter at this corresponding the second frequency-domain frequency of this each second mixed signal
Number value, and finds out this secondary signal minima according to being iterated result of the comparison.
6. method as claimed in claim 5, it is characterised in that exist according to this each first mixed signal
This first signal minimum corresponding to this correspondence first frequency, determines that this first orthogonal frequency domain wave filter is joined
Number comprises with this first homophase frequency domain filter parameter:
When the front bat of this two adjacent bat is less than this two adjacent bat at the signal value of this corresponding the first frequency-domain frequency
Rear bat when the signal value of this corresponding the first frequency-domain frequency, change a stepping positive and negative values；And
This first orthogonal frequency domain filter parameter or this first homophase frequency domain filter parameter are added this stepping
Positive and negative values, to update this first orthogonal frequency domain filter parameter or this first homophase frequency domain by step-by-step system
Filter parameter；
Wherein this stepping positive and negative values is this first orthogonal frequency domain filter parameter or this first homophase frequency domain filtering
The step by step modulating value of device parameter.
7. method as claimed in claim 5, it is characterised in that exist according to this each first mixed signal
This first signal minimum corresponding to this correspondence first frequency, determines that this first orthogonal frequency domain wave filter is joined
Number comprises with this first homophase frequency domain filter parameter:
When the front bat of this two adjacent bat is two adjacent not less than this at the signal value of this corresponding the first frequency-domain frequency
This first orthogonal frequency domain wave filter, when the signal value of this corresponding the first frequency-domain frequency, is joined by the rear bat clapped
Number or this first homophase frequency domain filter parameter, plus a stepping positive and negative values, are somebody's turn to do to be updated by step-by-step system
First orthogonal frequency domain filter parameter or this first homophase frequency domain filter parameter；
Wherein this stepping positive and negative values is this first orthogonal frequency domain filter parameter or this first homophase frequency domain filtering
The step by step modulating value of device parameter.
8. method as claimed in claim 5, it is characterised in that exist according to this each second mixed signal
This secondary signal minima corresponding to this correspondence second frequency, determines that this second orthogonal frequency domain wave filter is joined
Number comprises with this second homophase frequency domain filter parameter:
When the front bat of this two adjacent bat is less than this two adjacent bat at the signal value of this corresponding the second frequency-domain frequency
Rear bat when the signal value of this corresponding the second frequency-domain frequency, change a stepping positive and negative values；And
This second orthogonal frequency domain filter parameter or this second homophase frequency domain filter parameter are added this stepping
Positive and negative values updates this second orthogonal frequency domain filter parameter or this second homophase frequency domain filter parameter, with
Update this second orthogonal frequency domain filter parameter by step-by-step system or this second homophase frequency domain filter is joined
Number；
Wherein this stepping positive and negative values is this second orthogonal frequency domain filter parameter or this second homophase frequency domain filtering
The step by step modulating value of device parameter.
9. method as claimed in claim 5, it is characterised in that exist according to this each second mixed signal
This secondary signal minima corresponding to this correspondence second frequency, determines that this second orthogonal frequency domain wave filter is joined
Number comprises with this second homophase frequency domain filter parameter:
When the front bat of this two adjacent bat is two adjacent not less than this at the signal value of this corresponding the second frequency-domain frequency
This second orthogonal frequency domain wave filter, when the signal value of this corresponding the second frequency-domain frequency, is joined by the rear bat clapped
Number or this second homophase frequency domain filter parameter update the filter of this second orthogonal frequency domain plus a stepping positive and negative values
Ripple device parameter or this second homophase frequency domain filter parameter, to update this second orthogonal frequency by step-by-step system
Territory filter parameter or this second homophase frequency domain filter parameter；
Wherein this stepping positive and negative values is this second orthogonal frequency domain filter parameter or this second homophase frequency domain filtering
The step by step modulating value of device parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253998.7A CN103581074B (en) | 2012-07-20 | 2012-07-20 | Compensate the unbalanced method of signal of wireless telecommunication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253998.7A CN103581074B (en) | 2012-07-20 | 2012-07-20 | Compensate the unbalanced method of signal of wireless telecommunication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103581074A CN103581074A (en) | 2014-02-12 |
| CN103581074B true CN103581074B (en) | 2016-12-21 |
Family
ID=50052029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210253998.7A Active CN103581074B (en) | 2012-07-20 | 2012-07-20 | Compensate the unbalanced method of signal of wireless telecommunication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103581074B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835489A (en) * | 2005-03-16 | 2006-09-20 | 联发科技股份有限公司 | Device and method able to compensate unbalance of same phase/orthogonal phase |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010105694A1 (en) * | 2009-03-20 | 2010-09-23 | Signal Processing Devices Sweden Ab | Methods and apparatuses for compensation of i/q imbalance |
-
2012
- 2012-07-20 CN CN201210253998.7A patent/CN103581074B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835489A (en) * | 2005-03-16 | 2006-09-20 | 联发科技股份有限公司 | Device and method able to compensate unbalance of same phase/orthogonal phase |
Non-Patent Citations (2)
| Title |
|---|
| 数字接收机I/Q支路不平衡的时域补偿;唐世刚等;《清华大学学报》;20071231;全文 * |
| 正交频分复用系统发射机接收机同相/正交不平衡补偿算法;梁彦等;《南京理工大学学报》;20120630;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103581074A (en) | 2014-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1145388C (en) | Method and apparatus for radio communication | |
| EP1641132A1 (en) | transmitter and transmission method | |
| CN102090037B (en) | I/Q calibration of transmit and receive paths in OFDM FDD communication systems | |
| CN1780280A (en) | Inphase/quadrature phase imbalance compensation | |
| CN108462663A (en) | System and method for IQ mismatch calibrations and compensation | |
| DE102009051227B4 (en) | Digital modulation with jitter compensation for a polar transmitter | |
| KR100629621B1 (en) | Method for mixing frequency capable of calibrating linearity and device for mixing frequency using the same | |
| CN105282062B (en) | Unmatched bearing calibration and device between conveyer/receiver signal path | |
| CN102377700B (en) | Method for estimating In-phase/Quadrature (I/Q) unbalance of transmitting end and receiving end | |
| CN1835489A (en) | Device and method able to compensate unbalance of same phase/orthogonal phase | |
| CN104821832A (en) | Transmitter noise cancellation in a multi transmitter-receiver system | |
| TW201404092A (en) | Method of compensating signal imbalance of wireless communication system | |
| TW202243419A (en) | Transmitter circuit, compensation value calibration device and method for calibrating iq imbalance compensation values | |
| CN106209147A (en) | Tuner and signal tuning method | |
| CN103581074B (en) | Compensate the unbalanced method of signal of wireless telecommunication system | |
| CN110278167A (en) | A kind of pair of IQ imbalance carries out the continuous wireless communications method estimated with compensation | |
| KR20050010141A (en) | Apparatus and Methods for calibrating up-converter | |
| TW202222048A (en) | Method for calibrating transmitter | |
| SE519258C2 (en) | Transmitter | |
| CN117061019A (en) | Self-adaptive IQ mismatch calibration circuit and method based on transmitter calibration loop | |
| DE102009043078B4 (en) | Digital phase feedback for determining a phase distortion | |
| DE102004021225B4 (en) | DC offset cancellation for WLAN communication devices | |
| CN101436876B (en) | Method and system for cancellation of test signal | |
| CN100505525C (en) | Filter circuit | |
| CN115276676B (en) | Transmitter circuit, compensation value correction device and in-phase and quadrature imbalance compensation value correction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |