CN104717164B

CN104717164B - Signal bearing calibration and means for correcting

Info

Publication number: CN104717164B
Application number: CN201310675974.5A
Authority: CN
Inventors: 张元硕; 郑景嘉
Original assignee: Realtek Semiconductor Corp
Current assignee: Realtek Semiconductor Corp
Priority date: 2013-12-11
Filing date: 2013-12-11
Publication date: 2018-08-28
Anticipated expiration: 2033-12-11
Also published as: CN104717164A

Abstract

Unmatched signal bearing calibration between a kind of signal path of phase together being applied to a conveyer and an orthogonal signal path includes：In an a transmission end extra setup at least frequency mixer correction coefficient for the conveyer；From the transmission end by the test signal loopback of an at least frequency mixer an at least frequency mixer result of spectrum analysis is obtained to carry out spectrum analysis；An at least frequency mixer correction coefficient for the transmission end is adjusted according to an at least frequency mixer result of spectrum analysis；Additionally the mismatch between the low-pass filter with phase signal path of the transmission end and a low-pass filter in the orthogonal signal path of the transmission end is corrected using phase signal path finite impulse response filter together and an orthogonal signal path finite impulse response filter.Similar mismatch correct operation is equally applicable for a receiver.

Description

Signal bearing calibration and means for correcting

Technical field

Disclosed herein embodiment be to be relevant to bearing calibration and the interlock circuit of communication system, espespecially one kind is answered Phase together for a conveyer（I）Signal path is orthogonal with one（Q）The unmatched bearing calibration of signal path and related dress It sets.

Background technology

In general, more complicated modulation technique can usually include more message data, that is, can be by complicated tune System handles to improve transmission rate, such as 64 quadrature amplitude modulations (64-Quadrature Amplitude Modulation, 64- QAM), even 256-QAM.Therefore, more and more universal for the demand of high-order orthogonal amplitude modulation.If it is expected that high-order orthogonal shakes Width modulation can have good biography to produce effects fruit, it is necessary to correspondingly improve the error vector magnitude value (Error of communication system Vector Magnitude, EVM), and one of the most important factor for influencing error vector magnitude value be with mutually with it is orthogonal between not Balance the degree of (In-phase Quadrature-phase imbalance, IQ imbalance).Cause the unbalanced masters of IQ It is mismatch of radio frequency (Radio Frequency, the RF) circuit in IQ two-way to want reason, even deviation slightly also can be right Global communication system impacts, and forms incomplete orthogonal modulation/demodulation program, and then leads to the receiving terminal bit error rate (Bit Error Rate, BER) rising.The deviation can be divided into amplitude (amplitude) deviation and phase (phase) deviation again, once These deviations exist, and the Image interference of symmetrical frequency will be generated on frequency spectrum.Referring to FIG. 1, Fig. 1 is received by a receiving terminal A schematic diagram for receiving a mirror image signal caused by signal and the reception signal.The amplitude of the reception signal and the mirror image Difference between the amplitude of signal is commonly referred to as mirror image and repels than (Image Rejection Ratio, IRR), for example, When IQ is seriously uneven, IRR is on the contrary then big with regard to small.

In order to improve the influence caused by this deviation, often first carried out before formally transmitting-receiving signal on actual circuit Correct the action of (calibration), referred to as IQ corrections.And in-phase path in circuit and quadrature path are not caused each other not The main source matched has two, and one is local oscillator（local oscillator,LO）It generates carrier wave and respectively pushes away carrier wave It is sent to in-phase path and the frequency mixer on quadrature path（mixer）When, it is difficult to which perfect 90 degree of phase differences are presented, or it is pushed To the amplitude cause not of uniform size of in-phase path and two carrier waves of the respective frequency mixer of quadrature path, that is, above-mentioned phase Deviation and amplitude excursion.Secondly to occur due to inevitably having faulty situation in circuit manufacture procedure, can make same Phase path and the Incomplete matching, such as in-phase path and the low-pass filtering on quadrature path each other of two groups of components on quadrature path Device（low-pass filter,LPF）, analog-digital converter（analog-to-digital converter,ADC）, number Analog converter（digital-to-analog converter,DAC）Or gain amplifier（gain amplifier）Etc. groups Part mismatch, thus can cause by the signal of in-phase path and quadrature path generate difference, when signal pass through each other not mutually When matched in-phase path and quadrature path, Image interference signal just often will produce（As shown in Figure 1）, cause signal quality Reduction.Therefore, in communication system, IQ corrections how to be executed, it has also become a considerable subject under discussion in this field.

Invention content

According to an embodiment of the invention, a kind of phase together being applied to a conveyer is disclosed（I）Signal path is orthogonal with one （Q）The unmatched bearing calibration of signal path and interlock circuit, to solve the above problems.

A first embodiment according to the present invention discloses a kind of signal bearing calibration, for correcting the one first of a conveyer Mismatch between signal path and one second signal path, wherein one of first signal path and second signal path are Phase together（I）Signal path, first signal path are one orthogonal with the another of second signal path（Q）Signal path, should Bearing calibration includes：In an a transmission end extra setup at least frequency mixer correction coefficient for the conveyer；It will at least one mixing Device tests signal and generates one first transmission signal, and loopback by an at least frequency mixer correction coefficient from the transmission end (loopback) the first transmission signal carries out spectrum analysis to obtain an at least frequency mixer result of spectrum analysis；Extremely according to this Lack a frequency mixer result of spectrum analysis to adjust an at least frequency mixer correction coefficient, to obtain a final at least frequency mixer Correction coefficient, with correct between a frequency mixer of first signal path and a frequency mixer of second signal path not Match；And additionally utilize one first signal path finite impulse response filter（finite impulse response filter,FIR filter）To carry out one first signal path finite impulse response (FIR) processing and volume to first signal path It is outer to have to carry out one second signal path to second signal path using one second signal path finite impulse response filter Impulse response processing is limited, to correct between a filter of first signal path and a filter of second signal path Mismatch.

A second embodiment according to the present invention discloses a kind of signal bearing calibration, is used for the phase together of a receiver（I）News Number path is orthogonal with one（Q）Mismatch between signal path includes：In the receiver a receiving terminal extra setup at least One frequency mixer correction coefficient；An at least frequency mixer is tested signal to interrogate for one first transmission from the output of a transmission end of the receiver Number, in the first transmission signal that loopback (loopback) is returned after this at least a frequency mixer correction coefficient, it is carried out Spectrum analysis is to obtain an at least frequency mixer result of spectrum analysis；This is adjusted according to an at least frequency mixer result of spectrum analysis An at least frequency mixer correction coefficient for receiving terminal is connect with obtaining a final at least frequency mixer correction coefficient with correcting this Receive a mixing of a frequency mixer of first signal path of the receiving terminal of device and second signal path of the receiving terminal Mismatch between device；And additionally utilize one first signal path finite impulse response filter（finite impulse response filter,FIR filter）Come limited to first signal path, one first signal path of progress of the receiving terminal Impulse response handle, and additionally using one second signal path finite impulse response filter come to the receiving terminal this second Signal path carries out one second signal path finite impulse response (FIR) processing, to correct first news of the receiving terminal of the receiver Mismatch between one filter of one filter in number path and second signal path of the receiving terminal.

A 3rd embodiment according to the present invention discloses a kind of signal means for correcting, for correcting the one first of a conveyer Mismatch between signal path and one second signal path, wherein one of first signal path and second signal path are Phase together（I）Signal path, first signal path are one orthogonal with the another of second signal path（Q）Signal path, should Means for correcting includes a frequency mixer correction coefficient unit, frequency mixer test signal generation unit, a spectral analysis unit, one Frequency mixer correction coefficient adjustment unit and a finite impulse response filter unit.Wherein the frequency mixer correction coefficient unit is coupling It is connected to a transmission end of the conveyer, and is set with an at least frequency mixer correction coefficient.The frequency mixer tests signal generation unit To be used at least frequency mixer test signal generating one first by an at least frequency mixer correction coefficient from the transmission end Transmit signal.The spectral analysis unit is the first transmission signal for returning to loopback (loopback) to carry out frequency spectrum point Analysis is to obtain an at least frequency mixer result of spectrum analysis.The frequency mixer correction coefficient adjustment unit is at least one mixed according to this Frequency device result of spectrum analysis adjusts an at least frequency mixer correction coefficient, and system is corrected to obtain a final at least frequency mixer Number, to correct the mismatch between a frequency mixer of first signal path and a frequency mixer of second signal path.It should Finite impulse response filter unit is to be coupled to the transmission end of the conveyer, and utilize one first signal path for additional Finite impulse response filter（finite impulse response filter,FIR filter）Come to the first signal road Diameter carries out one first signal path finite impulse response (FIR) processing, and is additionally filtered using one second signal path finite impulse response (FIR) Wave device to carry out one second signal path finite impulse response (FIR) processing to second signal path, to correct first signal path A filter and second signal path a filter between mismatch.

A fourth embodiment according to the present invention discloses a kind of signal means for correcting, for correcting the one first of a receiver Mismatch between signal path and one second signal path, wherein one of first signal path and second signal path are Phase together（I）Signal path, first signal path are one orthogonal with the another of second signal path（Q）Signal path, should Means for correcting includes a frequency mixer correction coefficient unit, frequency mixer test signal generation unit, a spectral analysis unit, one Frequency mixer correction coefficient adjustment unit and a finite impulse response filter unit.Wherein the frequency mixer correction coefficient unit is coupling It is connected to a receiving terminal of the receiver, and is set with an at least frequency mixer correction coefficient.The frequency mixer tests signal generation unit To generate one first transmission signal from a transmission end of the receiver for an at least frequency mixer is tested signal.The spectrum analysis Unit be loopback (loopback) return this first transmission signal after this at least a frequency mixer correction coefficient, to its into Line frequency spectrum analysis is to obtain an at least frequency mixer result of spectrum analysis.The frequency mixer correction coefficient adjustment unit is should for foundation An at least frequency mixer result of spectrum analysis adjusts an at least frequency mixer correction coefficient for the receiving terminal, with obtain it is final should An at least frequency mixer correction coefficient, to correct a frequency mixer of first signal path of the receiving terminal of the receiver and be somebody's turn to do Mismatch between one frequency mixer of second signal path of receiving terminal.The finite impulse response filter unit is to be coupled to this The receiving terminal of receiver, and for additionally utilizing one first signal path finite impulse response filter（finite impulse response filter,FIR filter）To carry out one first signal to first signal path of the receiving terminal Path finite impulse response (FIR) processing, and additionally using one second signal path finite impulse response filter come to the receiving terminal Second signal path carry out one second signal path finite impulse response (FIR) processing, to correct the receiving terminal of the receiver Mismatch between one filter of one filter of first signal path and second signal path of the receiving terminal.

One of present invention advantage is that the phase together of a conveyer can be compensated by the above method and device （I）Signal path is orthogonal with one（Q）Mismatch between signal path, can especially compensate the conveyer this with phase signal Mismatch between path and the respective frequency mixer in orthogonal signal path；And compensate the conveyer this with phase signal path With the mismatch between the respective low-pass filter in orthogonal signal path.Between same phase signal path and orthogonal signal path Mismatch by after adequate compensation/correction, electronic device can obtain preferable communication efficiency.

Description of the drawings

Fig. 1 shows for a mirror image signal caused by the reception signal and the reception signal received by a receiving terminal It is intended to.

Fig. 2 is the schematic diagram for the conveyer that OFDM modulation passes receipts machine.

Fig. 3 is the schematic diagram for the receiver that OFDM modulation passes receipts machine.

Fig. 4 is to be used to correct between one first signal path of a conveyer and one second signal path according to the present invention A kind of schematic diagram of one embodiment of unmatched means for correcting.

Fig. 5 is the schematic diagram of another setting of the means for correcting of Fig. 4.

Fig. 6 is first according to the present invention with the schematic diagram of an embodiment of phase signal path frequency response computing unit.

Fig. 7 is first according to the present invention with the signal of another embodiment of phase signal path frequency response computing unit Figure.

Fig. 8 is to be used to correct between one first signal path of a conveyer and one second signal path according to the present invention A kind of schematic diagram of another embodiment of unmatched means for correcting.

Fig. 9 is the schematic diagram of another setting of the means for correcting of Fig. 8.

Figure 10 is second according to the present invention with the schematic diagram of an embodiment of phase signal path frequency response computing unit.

Figure 11 is second according to the present invention with the signal of another embodiment of phase signal path frequency response computing unit Figure.

Figure 12 is to be used to correct between one first signal path of a conveyer and one second signal path according to the present invention A kind of unmatched flow chart of an embodiment of bearing calibration.

Figure 13 is to be used to correct between one first signal path of a conveyer and one second signal path according to the present invention A kind of unmatched flow chart of another embodiment of bearing calibration.

Figure 14 is to be used to correct between one first signal path of a receiver and one second signal path according to the present invention A kind of unmatched schematic diagram of an embodiment of means for correcting.

Figure 15 is to be used to correct between one first signal path of a receiver and one second signal path according to the present invention A kind of unmatched schematic diagram of another embodiment of means for correcting.

Figure 16 is to be used to correct between one first signal path of a receiver and one second signal path according to the present invention A kind of unmatched flow chart of an embodiment of bearing calibration.

Figure 17 is to be used to correct between one first signal path of a receiver and one second signal path according to the present invention A kind of unmatched flow chart of another embodiment of bearing calibration.

Wherein, the reference numerals are as follows：

200,400,800 conveyer

440,1432 transmission end

202,302 the same as phase signal path

204,304 orthogonal signal path

206,306 correction coefficient unit

300,1400,1500 receiver

432,1440 receiving terminal

402,1402 frequency mixers test signal generation unit

404,1404 low-pass filters test signal generation unit

406,1406 frequency mixer correction coefficient unit

408,805,1408,1505 switch unit

410,1410 low-pass filter correction coefficient unit

412,812,1412,1512 tap coefficient calculation unit

414,1414 finite impulse response filter unit

416 first digital analog converters

418 second digital analog converters

420,1,420 first low-pass filter

422,1,422 second low-pass filter

424,1,424 first frequency mixer

426,1,426 second frequency mixer

428,1428 oscillator

430 power amplifiers

434 spectral analysis units

436,1436 frequency mixer correction coefficient adjustment unit

438,1438 low-pass filter correction coefficient adjustment unit

4122,14122 orthogonal signal path frequencies response computation unit

4124,14,124 first the same as phase signal path frequency response computing unit

4126,14126 coefficient calculation unit

4142,14,142 first finite impulse response filter

4144,14,144 second finite impulse response filter

8124,15,124 second the same as phase signal path frequency response computing unit

1202~1222,1310~1318 steps

1602~1622,1710~1718 steps

1430 low-noise amplifiers

1416 first analog-digital converters

1418 second analog-digital converters

Specific implementation mode

Some vocabulary has been used in specification and claims to censure specific component.Have in fields Usual skill is, it is to be appreciated that manufacturer may call same component with different nouns.This specification and right are wanted It asks book not in such a way that the difference of title is used as and distinguishes component, but differentiation is used as with the difference of component functionally Criterion.Be an open term in the "comprising" of specification in the whole text and claim mentioned in, thus should be construed to " include But it is not limited to ".In addition, " coupling " word is to include any direct and indirect electrical connection herein.Therefore, if in text It describing a first device and is coupled to a second device, then the second device can be directly electrically connected in by representing the first device, or It is electrically connected indirectly to the second device by other devices or connection means.

About the means for correcting of the present invention, first illustrate its basic theories with mathematical expression below, first, referring to FIG. 2, figure 2 pass the schematic diagram of a conveyer of receipts machine for OFDM modulation.In general, one in conveyer 200 is tested Same phase（I）Signal path 202 is orthogonal with one（Q）Signal path 204 can will have single with the presence or absence of there is unmatched situation The signal of frequency（single-tone signal）It is input to conveyer 200 and by it, then observing the signal of output end is It is no mirror image occur（image）Signal.When the mirror image signal of generation is stronger, same phase is indicated（I）Signal path 202 with it is orthogonal（Q）News Unmatched degree between number path 204 is higher.Include a correction coefficient unit 206 in conveyer 200, include there are two Correction coefficient is one first coefficient X and one second coefficient Y respectively, as shown in Fig. 2, the first coefficient X is for correcting same phase （I）Signal path 202 with it is orthogonal（Q）The amplitude of signal mismatches between signal path 204, and the second coefficient Y is for correcting Same phase（I）Signal path 202 with it is orthogonal（Q）The phase of signal mismatches between signal path 204.By changing correction coefficient list The first coefficient X and the second coefficient Y in member 206 can achieve the effect that eliminate mirror image signal.Theoretically, it is desirable to fully Mirror image signal is eliminated, needs to meet following equation：

Y=-tan(Φ) （2）

Φ herein indicates that frequency is f_sSingle-frequency test signal pass through same phase（I）Signal path 202 and orthogonal （Q）The path of signal path 204 mismatches generated phase difference, and R is then that frequency is f_sSingle-frequency test signal warp Cross same phase（I）Signal path 202 and orthogonal（Q）The path of signal path 204 mismatches generated amplitude difference ratio.

In addition to this, referring to FIG. 3, Fig. 3 is the schematic diagram for the receiver that OFDM modulation passes receipts machine.Generally For, to test the phase together in receiver 300（I）Signal path 302 is orthogonal with one（Q）Signal path 304 whether there is There is unmatched situation, it can be by the signal with single-frequency（single-tone signal）It is input to receiver 300 simultaneously By it, whether the signal for then analyzing receiving terminal there is mirror image（image）Signal.It include a correction system in receiver 300 Counting unit 306 includes there are two correction coefficient, is one first coefficient X and one second coefficient Y respectively.Likewise, working asAnd when Y=- tan (Φ), mirror image signal can be fully eliminated.Φ herein indicates that frequency is f_s Single-frequency test signal pass through same phase（I）Signal path 302 and orthogonal（Q）The path of signal path 304 mismatches institute The phase difference of generation, R are then that frequency is f_sSingle-frequency test signal pass through same phase（I）Signal path 202 and orthogonal （Q）The path of signal path 304 mismatches generated amplitude difference ratio.

Next the device of the invention and related description will be described in detail, be according to this referring first to Fig. 4, Fig. 4 Invention is for correcting unmatched a kind of correction dress between one first signal path of a conveyer and one second signal path The schematic diagram for the embodiment set, wherein first signal path are phase together with the one of second signal path（I）Signal road Diameter, first signal path are one orthogonal with the another of second signal path（Q）Signal path.Conveyer 400 includes one At least part of electronic device（Such as part or all）, and the electronic device includes an at least transmitting circuit and at least one Receiving circuit, and the example of the electronic device may include（But it is not limited to）：It is multifunctional mobile telephone, intelligent mobile phone, a Personal digital assistant（Personal Digital Assistant）, personal computer（Personal Computer）It is such as above-knee Type（Laptop）Computer and desktop（Desktop）Computer.Such as：Conveyer 400 can represent the place in the electronic device Manage module, such as a processor.In another example：Conveyer 400 can represent the entirety of the electronic device.However, this is only for explanation Purposes, not limitation of the present invention, can reach the design of same or like function, and meet this hair in fact, any Other variations of bright spirit, belong to scope of the invention.A change case according to the present embodiment, conveyer 400 can The system for including the electronic device is represented, and the electronic device is the subsystem of this system.Especially, which can To include OFDM modulation (Orthogonal Frequency Division Multiplexing, OFDM) circuit Electronic device, wherein conveyer 400 can be corrected for above-mentioned OFDM modulation circuit；But the present invention not with This is limited.

As shown in figure 4, conveyer 400 includes：One frequency mixer tests signal generation unit 402, a low-pass filter is surveyed Try signal generation unit 404, a frequency mixer correction coefficient unit 406, a switch unit 408, a low-pass filter correction coefficient Unit 410, a tap coefficient calculation unit 412, a finite impulse response filter unit 414, one first digital-to-analogue conversion Device 416, one second digital analog converter 418, one first low-pass filter 420, one second low-pass filter 422, one first Frequency mixer 424, one second frequency mixer 426, an oscillator 428, a power amplifier 430, a receiving terminal 432, a spectrum analysis Unit 434, a frequency mixer correction coefficient adjustment unit 436 and a low-pass filter correction coefficient adjustment unit 438.According to this Embodiment, conveyer 400 every time after restarting (such as after the power is turned on or after system resetting), and are passed in general data Before sending pattern formally to start, for a transmission end 440 of conveyer 400 to be improved（Turn including at least there is the first digital simulation Parallel operation 416, the second digital analog converter 418, the first low-pass filter 420, the second low-pass filter 422, the first frequency mixer 424, the second frequency mixer 426, oscillator 428）Phase together（I）Signal path (passes through the first digital mould in the transmission end The path of quasi- converter 416, the first low-pass filter 420 and the first frequency mixer 424) it is orthogonal with one（Q）Signal path (passes through Cross the path of the second digital analog converter 418 in the transmission end, the second low-pass filter 422 and the second frequency mixer 426) Between circuit characteristic mismatch, conveyer 400 can be introduced into a correction parameter calculate pattern；In other words, join in the correction Under number calculating pattern, the first step can be for this in the transmission end 440 of conveyer 400 with phase signal path and the orthogonal signal road The correction parameter of difference between diameter optimized calculates, and next carries out similar correction parameter meter to receiving terminal 432 again It calculates, can just allow transmission end 440 to enter general data transfer mode later, be simultaneously used in institute under the correction parameter calculating pattern Obtained correction parameter passes receipts to proceed by formal data.However, the purposes of explanation is these are only, not to the present invention's Limitation, can reach the design or operation sequence of same or like function in fact, any, and meet the invention essence of the present invention Other variations of god, belong to scope of the invention.For example, the first low-pass filter 420, second in conveyer 400 Low-pass filter 422 can also be the filter of other functions.

Specifically, first correction emphasis of the present embodiment is to be in addition the transmission end 440 for conveyer 400 adds Frequency mixer correction coefficient unit 406 is entered, frequency mixer correction coefficient unit 406 can directly or indirectly be coupled to conveyer 400 transmission end 440, and it is set with one first frequency mixer correction coefficient X and one second frequency mixer correction coefficient Y, wherein the One frequency mixer correction coefficient X be positioned at transmission end 440 this on phase signal path, that is to say, that by transmission end 440 should Signal with phase signal path can be multiplied with the first frequency mixer correction coefficient X, and then be corrected first due to transmission end 440 This caused by mismatch component characteristic between signal path and the second signal path is the same as phase signal path and the orthorhombic phase Amplitude between the signal path of position mismatches.And the second frequency mixer correction coefficient Y is to be coupled to this with phase signal path and be somebody's turn to do Between quadrature phase path, that is to say, that by the signal meeting with phase signal path of transmission end 440 and the second frequency mixer school Positive coefficient Y is multiplied, and is added again with the signal in the orthogonal signal path by transmission end 440 later, and then be corrected transmission This caused by mismatch component characteristic between first signal path and the second signal path at end 440 is the same as phase signal path It is mismatched with the phase in the orthogonal signal path.However, above details of operation and circuit design are only for the explanation of the present embodiment Purposes, not limitation of the present invention, actually also can be used is more than more than two correction coefficient, and so its is corresponding multiple Miscellaneous degree and precision are also possible to be varied from.Or it can be corrected using opposite mode the first frequency mixer is arranged Coefficient X and the second frequency mixer correction coefficient Y are (also that is, the first frequency mixer correction coefficient X is positioned at the orthogonal signal path second Frequency mixer correction coefficient Y is coupled to this between phase signal path and the quadrature phase path, and signal addition then betides This is with phase signal path)).It should be noted that in this embodiment, the initial value of the first frequency mixer correction coefficient X can be set It is set to 1, the initial value of the second frequency mixer correction coefficient Y can be set to 0, and in other words, in the state of ideal, first is mixed The value of frequency device correction coefficient X should be 1, and the value of the second frequency mixer correction coefficient Y should be 0.About the first frequency mixer correction coefficient X And second frequency mixer correction coefficient Y optimum value deciding means and details, will illustrate in subsequent paragraph.

In addition to this, second correction emphasis of the present embodiment is to be to be directed to the transmission end 440 of conveyer 400 in addition Finite impulse response filter unit 414 is added, finite impulse response filter unit 414 can either directly or indirectly be coupled to biography The transmission end 440 of device 400 is sent, and for extraly utilizing one first finite impulse response filter（finite impulse response filter,FIR filter）4142 to carry out phase signal together to same phase (I) signal path of transmission end 440 Path finite impulse response (FIR) processing；And extraly using one second finite impulse response filter 4144 come to transmission end 440 The orthogonal signal path carry out an orthogonal signal path finite impulse response (FIR) processing.By being suitably designed the first finite impulse Response filter 4142 and the respective multiple tap coefficient (tap of the second finite impulse response filter 4144 It coefficient), can be by 420 He of the first low-pass filter with phase signal path of the transmission end 440 of conveyer 400 Second low-pass filter 422 and second in the orthogonal signal path of the first digital analog converter 416 and transmission end 440 counts Mismatch between word analog converter 418, which corrects back to, to be come.It should be noted that in this embodiment, the first finite impulse response (FIR) Multiple tap coefficients of filter 4142 and the second finite impulse response filter 4144 can be set to original state, So that by the signal content of the first finite impulse response filter 4142 and the second finite impulse response filter 4144 It will not be changed.In other words, in the state of ideal, the first finite impulse response filter 4142 and the second limited arteries and veins As long as those tap coefficients for rushing response filter 4144 maintain initial value.About the first finite impulse response filter 4142 and second finite impulse response filter 4144 those tap coefficients optimum value deciding means and details, It will illustrate in subsequent paragraph.

It is first depending on the present embodiment, the lower non-match error to be handled that pattern is calculated in the correction parameter is first mixed Error and the first low-pass filter 420 between frequency device 424 and the second frequency mixer 426 and the first digital analog converter 416 and the second error between low-pass filter 422 and the second digital analog converter 418.Preceding paragraph is to operate in regular worker Working frequency, that is, a local oscillator frequencies f of oscillator 428_osc, can say more simple；And it is consequent can then be directed to it is more wide Frequency band gives different gains, can say relatively complicated, therefore the present embodiment can preferentially calculate frequency mixer correction coefficient unit 406 In the numerical value of the first frequency mixer correction coefficient X and the second frequency mixer correction coefficient Y, then on the basis of this be directed to limited arteries and veins Punching response filter unit 414 is handled.Therefore, when calculating frequency mixer correction coefficient unit 406, in addition to can first reset Except frequency mixer correction coefficient unit 406, the first finite impulse response (FIR) in finite impulse response filter unit 414 can be also reset Those tap coefficients of filter 4142 and the second finite impulse response filter 4144 pass through finite impulse in order to avoid changing Respond the signal of filter unit 414.In addition to this, since low-pass filter correction coefficient unit 410 is only in the present embodiment It is limited for assisting calculating the first finite impulse response filter 4142 and second in finite impulse response filter unit 414 In other words those tap coefficients of impulse response filter 4144 are only calculating finite impulse response filter unit 414 In tap coefficient when just need temporarily to use low-pass filter correction coefficient unit 410, therefore, no matter counting The content or conveyer 400 of calculation frequency mixer correction coefficient unit 406, all can be as shown in figure 4, will when general operation Switch 408 is set as bypassing（bypass）Low-pass filter correction coefficient unit 410.However, the present invention is not with above-mentioned Several related setting details are limited, for example, in the first frequency mixer correction coefficient for calculating frequency mixer correction coefficient unit 406 , also can be first without direct finite impulse response filter unit 414 when X and the second frequency mixer correction coefficient Y, such as bypass Finite impulse response filter unit 414 so that finite impulse response filter unit 414 does not interfere with frequency mixer correction coefficient list The calculating of the first frequency mixer correction coefficient X and the second frequency mixer correction coefficient Y of member 406.Above-mentioned suchlike variation, also Come under the scope of the present invention.

Next, frequency mixer test signal generation unit 402 will produce one first frequency mixer correction test signal TS1 and One second frequency mixer correction test signal TS2, the first frequency mixer correction test signal TS1 are that single-frequency tests signal, and its Frequency is the local oscillator frequencies f based on transmission end 440_oscStill further add a specific frequency f₀Obtained 1 first is mixed Frequency device corrects test frequency（Frequency is f_osc+f₀）；Similarly, the second frequency mixer correction test signal TS2 is also single-frequency Signal is tested, and its frequency is the local oscillator frequencies f based on transmission end 440_oscStill further subtract specific frequency f₀Gained The one second frequency mixer correction test frequency arrived（Frequency is f_osc-f₀）.First, the first frequency mixer correction test signal TS1 can be through Frequency mixer correction coefficient unit 406 is crossed, and low-pass filter correction coefficient unit 410 is bypassed by switch unit 408, later Using the finite impulse response filter unit 414 under original state, entire transmission end 440 is subsequent passed through, then loopback (loopback) receiving terminal 432 is arrived, spectrum analysis is carried out to it by spectral analysis unit 434 again later, to obtain a mixing Device result of spectrum analysis, and the frequency mixer result of spectrum analysis includes at least a mirror of the first frequency mixer correction test signal TS1 Picture（image）The information of signal size.Then, frequency mixer correction coefficient adjustment unit 436 can adjust the first frequency mixer correction system Number X, and the mirror image signal of the first frequency mixer correction test signal TS1 will be made to be presented the first of relative minimum and be mixed Device correction coefficient X is as one first result X_a；And the second frequency mixer correction coefficient Y of adjustment, and the first frequency mixer will be made The second frequency mixer correction coefficient Y of relative minimum is presented as one second result in the mirror image signal of correction test signal TS1 Y_a.About the detailed operation of above adjustment the first frequency mixer correction coefficient X and the second frequency mixer correction coefficient Y, citing comes It says, its value can be changed using certain pace for base unit, it so actually can be according to applying required precision and synthesis Various aspects at appropriately adjusting originally.

It holds, then the second frequency mixer correction test signal TS2 can similarly pass through frequency mixer correction coefficient unit 406, And low-pass filter correction coefficient unit 410 is bypassed by switch unit 408, later using the limited arteries and veins under original state Punching response filter unit 414 and transmission end 440, are then transmitted back to receiving terminal 432, later again by spectral analysis unit 434 Spectrum analysis is carried out to it to obtain a frequency mixer result of spectrum analysis, and the frequency mixer result of spectrum analysis includes at least the A mirror image of two frequency mixers correction test signal TS2（image）The information of signal size.Finally, frequency mixer correction coefficient adjusts Unit 436 can adjust the first frequency mixer correction coefficient X, and will make the mirror of the second frequency mixer correction test signal TS2 As the first frequency mixer correction coefficient X of relative minimum is presented as a third result X in signal_b；And the second frequency mixer of adjustment Correction coefficient Y, and the mirror image signal of the second frequency mixer correction test signal TS2 will be made to be presented the second of relative minimum Frequency mixer correction coefficient Y is as one the 4th result Y_b.Finally, to the first result X_aAnd third result X_bIt is averaged and is used as The first final frequency mixer correction coefficient X, and to the second result Y_aAnd the 4th result Y_bIt is averaged and is used as final Two frequency mixer correction coefficient Y.Herein obtained first frequency mixer correction coefficient X and the second frequency mixer correction coefficient Y be for The first frequency mixer will be directed to and correct test frequency（Frequency is f_osc+f₀）Correction result and the second frequency mixer correct test frequency （Frequency is f_osc-f₀）Correction result carry out averagely obtained approximate correction and optimally corrected as a result, can approach The orthogonal signal path of the frequency mixer 424 and transmission end 440 with phase signal path of the transmission end 440 of conveyer 400 Frequency mixer 426 between mismatch.

Next, then carrying out to calculate the first low-pass filter of lower processing 420 of pattern according to the present embodiment in the correction parameter And the second error between low-pass filter 422.As previously mentioned, using being coupled in finite impulse response filter unit 414 This of transmission end 440 is somebody's turn to do this with phase signal path with the first finite impulse response filter 4142 of phase signal path It is handled with phase signal path finite impulse response (FIR), and transmission end is coupled to using in finite impulse response filter unit 414 Second finite impulse response filter 4144 in the 440 orthogonal signal path carries out the orthogonal news to the orthogonal signal path The finite impulse response (FIR) processing of number path, with correct between the first low-pass filter 420 and the second low-pass filter 422 not Match.In addition to this, it is noted that since main purpose is to be to compensate this with phase signal path and the orthogonal signal road Mismatch between diameter, therefore can be compensated using only the first finite impulse response filter 4142 in practice, and by Two finite impulse response filters 4144 are fixed, such as can utilize a delay circuit string（delay chain）Come as second Finite impulse response filter 4144, wherein the delay circuit string are carried out only for the orthogonal signal path of transmission end 440 One signal delay processing so that be equal to by the delay time of the second finite impulse response filter 4144 limited by first The delay time of impulse response filter 4142, to avoid the mistake in sequential.

And about those of the first finite impulse response filter 4142 and the second finite impulse response filter 4144 The process of the adjustment of tap coefficient will be described in detail below.Referring first to Fig. 5, Fig. 5 is another setting of the means for correcting of Fig. 4 Schematic diagram, the switch unit 408 in wherein Fig. 4, which is switched to, connects another path, as shown in figure 5, this is set as specially using To calculate the low-pass filter correction coefficient unit 410 corresponding to multiple low-pass filters correction test frequency of different frequency It is multiple as a result, counter releasing the first finite impulse response filter 4142 and the second finite impulse response (FIR) according to those results again Those tap coefficients of filter 4144.Therefore, under the setting of Fig. 5, switch unit 408 is switched to by low-pass filtering Device correction coefficient unit 410.Low-pass filter correction coefficient unit 410 include one first low-pass filter correction coefficient W with And one second low-pass filter correction coefficient Z.Wherein the first low-pass filter correction coefficient W is coupled to positioned at transmission end 440 This with phase signal path, and for correct conveyer 400 transmission end 440 this with the first low-pass filtering on phase signal path Being somebody's turn to do caused by the mismatch between the second low-pass filter 422 on the orthogonal signal path of device 420 and transmission end 440 It is mismatched with the amplitude between phase signal path and the orthogonal signal path, and the second low-pass filter correction coefficient Z is coupling In receiving terminal 440 this between phase signal path and the quadrature phase path, and for correcting the transmission end of conveyer 400 Second on the 440 orthogonal signal path with the first low-pass filter 420 and transmission end 440 on phase signal path This caused by mismatch between low-pass filter 422 with the phase between phase signal path and the orthogonal signal path not Match.However, above details of operation and purposes of the circuit design only for the explanation of the present embodiment, not limitation of the present invention, Actually also can be used is more than more than two correction coefficient, its right corresponding complexity and precision are also possible to have Changed.Or can the first low-pass filter correction coefficient W and the second low-pass filter be set using opposite mode Correction coefficient Z (that is, the first low-pass filter correction coefficient W is located at orthogonal signal path and the correction of the second low-pass filter Coefficient Z is coupled to this between phase signal path and quadrature phase path).

It holds, low-pass filter test signal generation unit 404 can transmit N number of low-pass filter test signal TSL₁~ TSL_N, wherein N may be greater than zero arbitrary number, and pass through frequency mixer correction coefficient unit 406, low-pass filter correction coefficient Then unit 410 is recycled to and connects later using the finite impulse response filter unit 414 under original state, transmission end 440 Receiving end 432 carries out it spectrum analysis to obtain multiple low-pass filter frequencies respectively by spectral analysis unit 434 again later Spectrum analysis is as a result, those low-pass filter result of spectrum analysis include at least low-pass filter correction test signal TSL₁~TSL_N Corresponding multiple mirror image signal sizes information.It should be noted that low-pass filter test signal TSL₁~TSL_NPoint Test frequency f Wei not be corrected with the signal of single-frequency, thus with low-pass filter_tsl1~f_tslN, and due to only needing to consider Situation of the transmitter and receiver 400 under general operation, therefore low-pass filter correction test frequency f_tsl1~f_tslNConveyer can be located at Within 400 frequency ranges to be handled under general modfel.Low-pass filter tests signal TSL₁~TSL_NNumber and low Bandpass filter corrects test frequency f_tsl1~f_tslNSelection will have a direct impact in final finite impulse response filter unit 414 The first finite impulse response filter 4142 and the second finite impulse response filter 4144 calibration capability accuracy, Therefore visual demand and comprehensive various cost considerations are limited to design the first finite impulse response filter 4142 and second The tap number of impulse response filter 4144 and distribute these low-pass filters correction test frequency f_tsl1~f_tslN。

For each low-pass filter test signal TSL₁~TSL_N, low-pass filter correction coefficient adjustment unit 438 can adjust Whole first low-pass filter correction coefficient W, and low-pass filter test signal TSL will be made₁~TSL_NInstitute is corresponding should The first low-pass filter correction coefficient W of relative minimum is presented as first low-pass filter result W1~WN in mirror image signal； And the second low-pass filter correction coefficient Z of adjustment, and low-pass filter test signal TSL will be made₁~TSL_NInstitute is respectively right The second low-pass filter correction coefficient Z of relative minimum is presented as the second low-pass filter result Z in the mirror image signal answered₁ ~Z_N.And after all having carried out above-mentioned steps to each low-pass filter test signal, multiple first low pass filtereds can be obtained Wave device result and multiple second low-pass filter results.In next step, tap coefficient calculation unit 412 can be low using first Bandpass filter result W₁~W_NAnd the second low-pass filter result Z₁~Z_NTo calculate separately out the first finite impulse response filter Those tap coefficients of device 4142 and the second finite impulse response filter 4144, process are described below.

An orthogonal signal path frequencies response computation unit 4122 in tap coefficient calculation unit 412 can be first directed to should Second finite impulse response filter 4144 in orthogonal signal path carries out fourier conversion（Fourier transform）, real The second finite impulse response filter 4144 can be directed in business respectively in low-pass filter correction test frequency f_tsl1~f_tslNIt carries out The fast fourier of N points is converted（fast Fourier transform,FFT）, to ask to obtain the second finite impulse response (FIR) respectively Filter 4144 corresponds to low-pass filter correction test frequency f_tsl1~f_tslNMultiple frequency response B1~BN.According to equation （1）、（2）It can derive following equation sequence（3）, generally namely utilize one first in tap coefficient calculation unit 412 B is responded with phase signal path frequency response computing unit 4124, and according to multiple orthogonal signal path frequencies₁~B_N, and it is corresponding Low-pass filter corrects test frequency f_tsl1~f_tslNThe first low-pass filter result W₁~W_NAnd the second low-pass filter knot Fruit Z₁~Z_NTo obtain same phase signal path frequency response A₁~A_N。

Fig. 6 is first according to the present invention with the schematic diagram of an embodiment of phase signal path frequency response computing unit. It should be noted that first in Fig. 6 with phase signal path frequency response computing unit is according to equation（3）To carry out operation. And in fact, equation（3）Can again further using approximate method and by abbreviation be equation below（4）：

Fig. 7 is first according to the present invention with the signal of another embodiment of phase signal path frequency response computing unit Figure.It should be noted that first in Fig. 7 with phase signal path frequency response computing unit is according to equation（4）To be transported It calculates.

It is obtaining with phase signal path frequency response A₁~A_NLater, the coefficient in tap coefficient calculation unit 412 Computing unit 4126 can be directed to according to phase signal path frequency response A₁~A_NCarry out fourier inverse transform（inverse Fourier transform）, and real part is taken to the result of fourier inverse transform, to obtain the first finite impulse response (FIR) filter Those tap coefficients of wave device 4142.In practice, it can be directed to phase signal path frequency response A₁~A_NCarry out fast fourier Inverse transform（inverse fast Fourier transform,iFFT）, and real number is taken to the result of fast fourier inverse transform Part, to obtain those tap coefficients of the first finite impulse response filter 4142.

According to above deduction, the content of the finite impulse response filter unit 414 finally obtained can be the first limited arteries and veins Response filter 4142 is rushed, those tap coefficients therein have calculated as above；And second finite impulse response filter 4144, for such as the above-mentioned delay circuit string having with the 4142 same delay time of the first finite impulse response filter.Arrive this, Having been obtained for the institute of transmission end 440 in the present embodiment, it is necessary to correction parameters, as long as later switching back into switch unit 408 Setting shown in Fig. 4, then conveyer 400, which can execute general data and pass, receives, unlike, due to by frequency mixer correction system The correction of counting unit 406 and finite impulse response filter unit 414, the at this time performance of transmission end 440 will be better than not correcting it Preceding performance.

Referring to FIG. 8, Fig. 8 is one first signal path and one second signal for being used to correct a conveyer according to the present invention Unmatched a kind of schematic diagram of another embodiment of means for correcting between path, wherein first signal path with this second The one of signal path is phase together（I）Signal path, first signal path are one orthogonal with the another of second signal path （Q）Signal path.Unlike conveyer 400, in the tap coefficient calculation unit 812 in the conveyer 800 in Fig. 8 Second can directly replace tap coefficient meter in conveyer 400 with phase signal path frequency response computing unit 8124 The orthogonal signal path frequencies response computation unit 4122 and first calculated in unit 412 is calculated with phase signal path frequency response Unit 4124.In addition, all exchange units 805 are arranged before frequency mixer correction coefficient unit 406.It should be noted that Fig. 8 is For the setting for obtaining the first frequency mixer correction coefficient X and the second frequency mixer correction coefficient Y, wherein 805 He of switch unit The setting of switch unit 408 is as shown, in other words, frequency mixer tests test news caused by signal generation unit 402 Frequency mixer correction coefficient unit 406 can be passed through number at this time, but not by low-pass filter correction coefficient unit 410.Fig. 9 is figure The schematic diagram of another setting of 8 means for correcting, switch unit 805 and switch unit 408 in wherein Fig. 8 are cut respectively It shifts to and connects another path, that is to say, that frequency mixer tests test signal caused by signal generation unit 402 at this time will not be through Frequency mixer correction coefficient unit 406 is crossed, but low-pass filter correction coefficient unit 410 can be passed through.The operation of related setting and Switching please refers to the hereinbefore description as described in Fig. 4 and Fig. 5, just seldom repeats herein.For tap coefficient calculation unit 812, for the variation compared to the tap coefficient calculation unit 412 in previous embodiment, according to equation（5）, tap Coefficient calculation unit 812 can direct basis correspond to low-pass filter correction test frequency f_tsl1~f_tslNThe first low-pass filter As a result W₁~W_NAnd the second low-pass filter result Z₁~Z_NAnd first frequency mixer correction coefficient X and the second frequency mixer school Positive coefficient Y obtains same phase signal path frequency response A₁~A_N。

Figure 10 is second according to the present invention with the schematic diagram of an embodiment of phase signal path frequency response computing unit. It should be noted that second in Figure 10 with phase signal path frequency response computing unit is according to equation（5）To carry out operation. And in fact, equation（5）In cos²(arctan(Z_i)) Taylor expansion can be further used again（Taylor series）To expand into (1-Z_i ²+Z_i ⁴+ ...), in order to reduce the complexity of operation, only first three items can be taken to come as close herein Like value, therefore equation（5）Can be equation below by abbreviation（6）：

Figure 11 is second according to the present invention with the signal of another embodiment of phase signal path frequency response computing unit Figure.It should be noted that second in Figure 11 with phase signal path frequency response computing unit is according to equation（6）To be transported It calculates.

Figure 12 is to be used to correct between one first signal path of a conveyer and one second signal path according to the present invention A kind of unmatched flow chart of an embodiment of bearing calibration, wherein first signal path and second signal path One is phase together（I）Signal path, first signal path are one orthogonal with the another of second signal path（Q）Signal road Diameter.If generally can reach it is identical as a result, it is not absolutely required to according in flow shown in Figure 12 step sequence come into Row, and the step shown in Figure 12 is not necessarily intended to be carried out continuously, that is, other steps also can be inserted into wherein.In addition, certain in Figure 12 What a little steps can be omitted according to different embodiments or design requirement.The bearing calibration of Figure 12 can be applied to Fig. 4 and shown in fig. 5 Conveyer 400.Detailed step is as follows：

Step 1202：In an a transmission end extra setup at least frequency mixer correction coefficient for the conveyer；

Step 1204：An at least frequency mixer is tested signal from the transmission end to come by an at least frequency mixer correction coefficient One first transmission signal is generated, and loopback (loopback) the first transmission signal is mixed to obtain at least one to carry out spectrum analysis Frequency device result of spectrum analysis；

Step 1206：An at least frequency mixer correction coefficient is adjusted according to an at least frequency mixer result of spectrum analysis, To obtain a final at least frequency mixer correction coefficient, to correct the frequency mixer and second news of first signal path Mismatch between one frequency mixer in number path；

Step 1208：An at least filter correction coefficient is set in the transmission end of the conveyer；

Step 1210：By an at least filters to test signal from the transmission end by an at least frequency mixer correction coefficient with And an at least filter correction coefficient come generate one second transmission signal, and loopback (loopback) this second transmission signal into Line frequency spectrum analysis, to obtain an at least filter spectrum analysis result；

Step 1212：An at least filter for the transmission end is adjusted according to an at least filter spectrum analysis result Correction coefficient；

Step 1214：Utilize a delay circuit string（delay chain）To ring as the second signal path finite impulse Filter is answered, and the delay circuit string is to carry out a signal delay processing, the wherein signal delay for second signal path One delay time of processing is first signal for corresponding to the first signal path finite impulse response filter and being carried out One delay time of path finite impulse response (FIR) processing；

Step 1216：The second signal path finite impulse response filter is found out respectively in an at least filter correction At least one second signal path frequency response in test frequency；

Step 1218：According at least one second signal path frequency response, corresponding at least filter correction test At least first filter correction coefficient result and an at least second filter correction coefficient for frequency is as a result, to obtain At least one first signal path frequency response；

Step 1220：The first signal path finite impulse is obtained according at least one first signal path frequency response An at least tap coefficient for response filter；And

Step 1222：Without an at least filter correction coefficient, by the first signal path finite impulse response (FIR) Filter is handled to carry out the first signal path finite impulse response (FIR) to first signal path, to correct the first signal road Mismatch between the filter of diameter and the filter of second signal path.

It is familiar with this field person and was reading the detailed description for Fig. 4 and conveyer shown in fig. 5 400 a little earlier herein Later, step 1202~step 1222 of the bearing calibration of Figure 12 should be able to clearly be illustrated, therefore for brevity, herein just not It is further described for details therein.

Figure 13 is to be used to correct between one first signal path of a conveyer and one second signal path according to the present invention A kind of unmatched flow chart of another embodiment of bearing calibration.If generally can reach identical as a result, and differing It is fixed to need to carry out according to the step sequence in flow shown in Figure 13, and the step shown in Figure 13 is not necessarily intended to be carried out continuously, That is, other steps also can be inserted into wherein.In addition, certain steps in Figure 13 can be omitted according to different embodiments or design requirement 's.The bearing calibration of Figure 13 can be applied to Fig. 8 and conveyer shown in Fig. 9 800.Detailed step is as follows：

Step 1310：By an at least filters to test signal from the transmission end without an at least frequency mixer correction coefficient And by an at least filter correction coefficient come generate one second transmission signal, and loopback (loopback) this second transmission Signal carries out spectrum analysis, to obtain an at least filter spectrum analysis result；

Step 1316：Come according to the first filter result and the second filter result and frequency mixer correction coefficient Obtain at least phase signal path frequency response together；

Step 1318：The first signal path finite impulse is obtained according at least one first signal path frequency response An at least tap coefficient for response filter；And

It is familiar with this field person and was reading the detailed description for Fig. 8 and conveyer shown in Fig. 9 800 a little earlier herein Later, should be able to clearly be illustrated step 1202~step 1214 of the bearing calibration of Figure 13, step 1320~step 1322 and Step 1222, therefore for brevity, just it is not further described herein for details therein.

Next, please refer to Fig.1 4, Figure 14 be used to correct according to the present invention a receiver one first signal path and Unmatched a kind of schematic diagram of an embodiment of means for correcting between one second signal path, wherein first signal path It is phase together with one of second signal path（I）Signal path, first signal path are another with second signal path It is orthogonal for one（Q）Signal path.Receiver 1400 includes at least part of an electronic device（Such as part or all）, And the electronic device includes an at least transmitting circuit and an at least receiving circuit, and the example of the electronic device may include（But no It is limited to）：Multifunctional mobile telephone, intelligent mobile phone, personal digital assistant（Personal Digital Assistant）、 Personal computer（Personal Computer）It is such as on knee（Laptop）Computer and desktop（Desktop）Computer. Such as：Receiver 1400 can represent the processing module in the electronic device, such as a processor.In another example：Receiver 1400 can Represent the entirety of the electronic device.However, this purposes only for explanation, not limitation of the present invention, in fact, any energy Enough reach the design of same or like function, and meet other variations of the spirit of the present invention, belongs to the model of the present invention Farmland.A change case according to the present embodiment, receiver 1400 can represent the system comprising the electronic device, and the electronic device For the subsystem of this system.Especially, which can be to include OFDM modulation (Orthogonal Frequency Division Multiplexing, OFDM) circuit electronic device, wherein receiver 1400 can be directed to above-mentioned OFDM modulation circuit be corrected；But the present invention is not limited thereto.

As shown in figure 14, receiver 1400 includes：One frequency mixer tests signal generation unit 1402, a low-pass filter Test signal generation unit 1404, a frequency mixer correction coefficient unit 1406,1408,1505, one low-pass filtering of a switch unit Device correction coefficient unit 1410, a tap coefficient calculation unit 1412, a finite impulse response filter unit 1414, one first Analog-digital converter 1416, one second analog-digital converter 1418, one first low-pass filter 1420, one second low pass filtered Wave device 1422, one first frequency mixer 1424, one second frequency mixer 1426, an oscillator 1428, a low-noise amplifier 1430, one Transmission end 1432, a spectral analysis unit 1434, a frequency mixer correction coefficient adjustment unit 1436 and a low-pass filter school Positive coefficient adjustment unit 1438.According to the present embodiment, receiver 1400 every time after restarting (such as after the power is turned on or system After resetting), and before general data receiver pattern formally starts, for a receiving terminal of receiver 1400 to be improved 1440（Including at least having the first analog-digital converter 1416, the second analog-digital converter 1418, the first low-pass filter 1420, the second low-pass filter 1422, the first frequency mixer 1424, the second frequency mixer 1426, oscillator 1428）Phase together（I） (the first frequency mixer 1424, the first low-pass filter 1420 and first passed through in receiving terminal 1440 simulates number to signal path The path of word converter 1416) it is orthogonal with one（Q）Signal path (passes through the second frequency mixer 1426 in receiving terminal 1440, the The path of two low-pass filters 1422 and the second analog-digital converter 1418) between circuit characteristic mismatch, receiver 1400, which can be introduced into a correction parameter, calculates pattern；In other words, under the correction parameter calculating pattern, receiver can be directed to The correction optimized of this in 1400 receiving terminal 1440 with the difference between phase signal path and the orthogonal signal path Parameter calculates, and receiving terminal 1440 can just be allowed to enter general data receiver pattern later, is simultaneously used in correction parameter calculating Obtained correction parameter proceeds by formal data receiver under pattern.However, this purposes only for explanation, not pair The limitation of the present invention, can reach the design or operation sequence of same or like function, and meet the present invention in fact, any Spirit other variation, belong to scope of the invention.

For the first frequency mixer 1424 of the receiving terminal 1440 of the receiver 1400 of Figure 14, the second frequency mixer 1426 and One low-pass filter 1420, the second low-pass filter 1422 correction principle be approximately identical to Fig. 4 conveyer 400 transmission end The correction of 440 the first frequency mixer 424, the second frequency mixer 426 and the first low-pass filter 420, the second low-pass filter 422 Principle, and be familiar with this field person and reading the detailed description for Fig. 4 and conveyer shown in fig. 5 400 a little earlier herein Later, the details of operation of the receiver 1400 of Figure 14 should be able to clearly be illustrated, therefore for brevity, is not just directed to herein wherein Details be further described.

Figure 15 is to be used to correct between one first signal path of a receiver and one second signal path according to the present invention A kind of unmatched schematic diagram of another embodiment of means for correcting, wherein first signal path and second signal path One be phase together（I）Signal path, first signal path are one orthogonal with the another of second signal path（Q）Signal road Diameter.Unlike receiver 1400, the in the tap coefficient calculation unit 1512 in the receiver 1500 in Figure 15 Two can directly replace the tap coefficient in receiver 1400 to calculate with phase signal path frequency response computing unit 15124 Orthogonal signal path frequencies response computation unit 14122 and first in unit 1412 is calculated with phase signal path frequency response Unit 14124.For the abbreviation principle of the tap coefficient calculation unit 1512 of the receiving terminal 1440 of the receiver 1500 of Figure 15 It is approximately identical to the correction principle of the tap coefficient calculation unit 812 of the conveyer 800 of Fig. 8, and is familiar with this field person and is readding Read herein a little earlier for the detailed description of Fig. 8 and the 10th~11 figure after, should be able to clearly be illustrated Figure 15 second together The details of operation of phase signal path frequency response computing unit 15124, therefore for brevity, be not just directed to herein therein thin Section is further described.

Figure 16 is to be used to correct between one first signal path of a receiver and one second signal path according to the present invention A kind of unmatched flow chart of an embodiment of bearing calibration, wherein first signal path and second signal path One is phase together（I）Signal path, first signal path are one orthogonal with the another of second signal path（Q）Signal road Diameter.If generally can reach it is identical as a result, it is not absolutely required to according in flow shown in Figure 16 step sequence come into Row, and the step shown in Figure 16 is not necessarily intended to be carried out continuously, that is, other steps also can be inserted into wherein.In addition, certain in Figure 16 What a little steps can be omitted according to different embodiments or design requirement.The bearing calibration of Figure 16 can be applied to receiver shown in Figure 14 1400.Detailed step is as follows：

Step 1602：In an a receiving terminal extra setup at least frequency mixer correction coefficient for the receiver；

Step 1604：An at least frequency mixer is tested signal to interrogate for one first transmission from the output of a transmission end of the receiver Number, and in the first transmission signal of loopback (loopback) back after this at least a frequency mixer correction coefficient, to it Spectrum analysis is carried out to obtain an at least frequency mixer result of spectrum analysis；

Step 1606：An at least frequency mixer for the receiving terminal is adjusted according to an at least frequency mixer result of spectrum analysis Correction coefficient, to obtain a final at least frequency mixer correction coefficient, to correct the same phase of the receiving terminal of the conveyer Mismatch between one frequency mixer of signal path and a frequency mixer in the orthogonal signal path of the receiving terminal；

Step 1608：Other than original frequency mixer correction coefficient, in addition at least one filtering of receiving terminal setting Device correction coefficient；

Step 1610：An at least filters to test signal is interrogated from the output of the transmission end of the receiver for one second transmission Number, and the second transmission signal returned in loopback (loopback) corrects system by an at least frequency mixer for the receiving terminal After number and an at least filter correction coefficient, spectrum analysis is carried out to it to obtain at least filter spectrum analysis knot Fruit；

Step 1612：An at least filter for the receiving terminal is adjusted according to an at least filter spectrum analysis result Correction coefficient；

Step 1614：Utilize a delay circuit string（delay chain）To ring as the second signal path finite impulse Filter is answered, and the delay circuit string is to carry out a signal delay processing, the wherein signal delay for second signal path One delay time of processing is first signal for corresponding to the first signal path finite impulse response filter and being carried out One delay time of path finite impulse response (FIR) processing；

Step 1616：The second signal path finite impulse response filter is found out respectively in an at least filter correction At least one second signal path frequency response in test frequency；

Step 1618：It is surveyed according at least one second signal path frequency response and a corresponding at least filter correction Try frequency an at least first filter correction coefficient result and this at least a second filter correction coefficient result is come To at least one first signal path frequency response；

Step 1620：The first signal path finite impulse is obtained according at least one first signal path frequency response An at least tap coefficient for response filter；And

Step 1622：Without an at least filter correction coefficient, by the first signal path finite impulse response (FIR) Filter is handled to carry out the first signal path finite impulse response (FIR) to first signal path, to correct the first signal road Mismatch between the filter of diameter and the filter of second signal path.

Be familiar with this field person read herein a little earlier for the detailed description of receiver shown in Figure 14 1400 (such as The detailed description of Fig. 4 and Fig. 5) after, step 1602~step 1622 of the bearing calibration of Figure 16 should be able to clearly be illustrated, because This is not just further described for brevity for details therein herein.

Figure 17 is to be used to correct between one first signal path of a receiver and one second signal path according to the present invention A kind of unmatched flow chart of another embodiment of bearing calibration, wherein first signal path and second signal path One be phase together（I）Signal path, first signal path are one orthogonal with the another of second signal path（Q）Signal road Diameter.If generally can reach it is identical as a result, it is not absolutely required to according in flow shown in Figure 17 step sequence come into Row, and the step shown in Figure 17 is not necessarily intended to be carried out continuously, that is, other steps also can be inserted into wherein.In addition, certain in Figure 17 What a little steps can be omitted according to different embodiments or design requirement.The bearing calibration of Figure 17 can be applied to receiver shown in figure 15 1500.Detailed step is as follows：

Step 1710：An at least filters to test signal is interrogated from the output of the transmission end of the receiver for one second transmission Number, and the second transmission signal for making loopback (loopback) return is corrected without an at least frequency mixer for the receiving terminal Coefficient and after this at least a filter correction coefficient carries out it spectrum analysis to obtain an at least filter spectrum point Analyse result；

Step 1716：According to the first filter result and the second filter result and the frequency mixer correction coefficient To obtain at least one first signal path frequency response；

Step 1718：The first signal path finite impulse is obtained according at least one first signal path frequency response An at least tap coefficient for response filter；And

Be familiar with this field person read herein a little earlier for the detailed description of receiver 1500 shown in figure 15 (such as The detailed description of Fig. 8 and the 10th~11 figure) after, step 1602~step of the bearing calibration of Figure 17 should be able to clearly be illustrated 1614, step 1720~step 1722 and step 1622, therefore for brevity, be not just directed to details therein herein and make more Further instruction.

The main spirit of the present invention is that the phase together of a conveyer can be compensated by the above method and device（I）News Number path is orthogonal with one（Q）Mismatch between signal path, can especially compensate the conveyer this with phase signal path With the mismatch between the respective frequency mixer in orthogonal signal path；And compensate the conveyer this with phase signal path with should Mismatch between the respective low-pass filter in orthogonal signal path.Between same phase signal path and orthogonal signal path not By after adequate compensation/correction, electronic device can obtain preferable communication efficiency for matching.

Claims

1. a kind of signal bearing calibration, for correcting between one first signal path of a conveyer and one second signal path It mismatches, wherein one of first signal path and second signal path are phase signal path together, first signal path Another with second signal path is an orthogonal signal path, which is characterized in that the bearing calibration includes：

In an a transmission end extra setup at least frequency mixer correction coefficient for the conveyer；

Signal is tested according to an at least frequency mixer and an at least frequency mixer correction coefficient generates one first transmission signal, and loopback The first transmission signal carries out spectrum analysis to obtain an at least frequency mixer result of spectrum analysis；

Adjust an at least frequency mixer correction coefficient according to an at least frequency mixer result of spectrum analysis, with obtain this at least one One end value of frequency mixer correction coefficient, to correct one first frequency mixer and second signal path of first signal path One second frequency mixer between mismatch；And

One first signal additionally is carried out to first signal path using one first signal path finite impulse response filter Path finite impulse response (FIR) processing, and additionally using one second signal path finite impulse response filter come to second news Number path carries out one second signal path finite impulse response (FIR) processing, with correct a first filter of first signal path with And the mismatch between a second filter of second signal path；

Wherein additionally using the first signal path finite impulse response filter come first signal path to the transmission end Carrying out the step of the first signal path finite impulse response (FIR) is handled includes：

An at least filter correction coefficient is set in the transmission end of the conveyer；

One second transmission signal is generated according to an at least filters to test signal and an at least filter correction coefficient, and is returned The second transmission signal is given to carry out spectrum analysis, to obtain an at least filter spectrum analysis result；

An at least filter correction coefficient for the transmission end is adjusted according to an at least filter spectrum analysis result；

The first signal path finite impulse of the transmission end is obtained according at least filter correction coefficient after adjustment An at least tap coefficient for response filter；And

Without an at least filter correction coefficient, by the first signal path finite impulse response filter come to this One signal path carries out the first signal path finite impulse response (FIR) processing, to correct first filtering of first signal path Mismatch between device and the second filter of second signal path.

2. method as claimed in claim 1, the wherein conveyer are an OFDM modulation conveyer.

3. method as claimed in claim 1, wherein an at least frequency mixer correction coefficient, which include at least, the correction of one first frequency mixer Coefficient and one second frequency mixer correction coefficient, wherein the first frequency mixer correction coefficient are for correcting first signal path Amplitude between second signal path mismatches；And the second frequency mixer correction coefficient is for correcting first signal Path and the phase of second signal path mismatch.

4. method as claimed in claim 3, wherein an at least frequency mixer test signal include the correction test of one first frequency mixer Signal and one second frequency mixer correction test signal, and first frequency mixer correction test signal has one first frequency mixer school There is one second frequency mixer to correct test frequency for positive test frequency, second frequency mixer correction test signal；And first mixing Device corrects the local oscillator frequencies that test frequency is the transmission end and is corrected plus a specific frequency and second frequency mixer Test frequency is that the local oscillator frequencies of the transmission end subtract the specific frequency.

5. method as claimed in claim 4, wherein adjusting at least one mixing according to an at least frequency mixer result of spectrum analysis Device correction coefficient, to include the step of obtaining a final at least frequency mixer correction coefficient：

The first frequency mixer correction coefficient is adjusted, and the mirror image signal that first frequency mixer correction will be made to test signal is in The first frequency mixer correction coefficient of existing relative minimum is as one first result；

The second frequency mixer correction coefficient is adjusted, and the mirror image signal that first frequency mixer correction will be made to test signal is in The second frequency mixer correction coefficient of existing relative minimum is as one second result；

The first frequency mixer correction coefficient is adjusted, and the mirror image signal that second frequency mixer correction will be made to test signal is in The first frequency mixer correction coefficient of existing relative minimum is as a third result；

The second frequency mixer correction coefficient is adjusted, and the mirror image signal that second frequency mixer correction will be made to test signal is in The second frequency mixer correction coefficient of existing relative minimum is as one the 4th result；And

Generate final the first frequency mixer correction coefficient according to first result and the third result, and according to this Two results and the 4th result generate final the second frequency mixer correction coefficient.

6. method as claimed in claim 1, wherein additionally using the second signal path finite impulse response filter come to the biography Second signal path of sending end carry out the second signal path finite impulse response (FIR) processing the step of additionally comprised：

Using a delay circuit string come as the second signal path finite impulse response filter, and the delay circuit string is needle One signal delay processing is carried out to second signal path, a delay time of wherein signal delay processing is to correspond to this One delay of the first signal path finite impulse response (FIR) processing that the first signal path finite impulse response filter is carried out Time.

7. method as claimed in claim 1, wherein according to an at least filters to test signal and an at least filter correction system It counts and includes the step of the second transmission signal to generate：

By an at least filters to test signal from the transmission end by an at least frequency mixer correction coefficient and this at least one Filter correction coefficient come generate this second transmission signal.

8. method as claimed in claim 7, wherein an at least filter correction coefficient, which include at least, first filter correction Coefficient and a second filter correction coefficient；The first filter correction coefficient is for correcting first signal path and being somebody's turn to do Amplitude between second signal path mismatches；And the second filter correction coefficient is for correcting first signal path Phase between second signal path mismatches.

9. method as claimed in claim 8, wherein an at least filters to test signal have at least filter correction test frequency Rate, and an at least filter correction test frequency is within the frequency range that the conveyer to be handled.

10. method as claimed in claim 9, wherein adjusting being somebody's turn to do for the transmission end according to an at least filter spectrum analysis result At least the step of filter correction coefficient, includes：

The first filter correction coefficient is adjusted, and a mirror image signal of an at least filters to test signal will be made to present The first filter correction coefficient of relative minimum is used as an at least first filter correction coefficient result；And

The second filter correction coefficient is adjusted, and the mirror image signal of an at least filters to test signal will be made to present The second filter correction coefficient of relative minimum is used as an at least second filter correction coefficient result.

11. as claim 10 method, wherein according to adjustment after an at least filter correction coefficient come obtain this first The step of at least tap coefficient for signal path finite impulse response filter includes：

The second signal path finite impulse response filter is found out respectively on this at least a filter correction test frequency At least one second signal path frequency response；

According at least one second signal path frequency response, a corresponding at least filter correction test frequency this at least one First filter correction coefficient result and an at least second filter correction coefficient are as a result, to obtain at least one first signal Path frequencies respond；And

The first signal path finite impulse response filter is obtained according at least one first signal path frequency response An at least tap coefficient.

12. such as the method for claim 11, wherein in the second signal path finite impulse response filter for finding out the transmission end Device respectively at least one second signal path frequency response on this at least a filter correction test frequency the step of in, be Fourier conversion is carried out for an at least tap coefficient for the second signal path finite impulse response filter, to find out this Second signal path finite impulse response filter respectively on this at least a filter correction test frequency this at least 1 Two signal path frequency responses；And first signal path is being obtained according at least one first signal path frequency response In the step of at least tap coefficient for finite impulse response filter, to be directed at least one first signal path frequency Response carries out fourier inverse transform, and takes real part to the result of fourier inverse transform, with obtain the transmission end this first An at least tap coefficient for signal path finite impulse response filter.

13. method as claimed in claim 1, wherein by an at least filters to test signal from the transmission end by least one filter Wave device correction coefficient come generate this second transmission signal the step of include：

By an at least filters to test signal from the transmission end without an at least frequency mixer correction coefficient and by being somebody's turn to do An at least filter correction coefficient come generate this second transmission signal.

14. such as the method for claim 13, wherein an at least filter correction coefficient, which includes at least, a first filter school Positive coefficient and a second filter correction coefficient；The first filter correction coefficient be for correct first signal path with Amplitude between second signal path mismatches；And the second filter correction coefficient is for correcting the first signal road Phase between diameter and second signal path mismatches.

15. such as the method for claim 14, wherein an at least filters to test signal is tested with an at least filter correction Frequency, and an at least filter correction test frequency is within the frequency range that the conveyer to be handled.

16. such as the method for claim 15, wherein adjusting the transmission end according to an at least filter spectrum analysis result The step of at least filter correction coefficient includes：

The first filter correction coefficient is adjusted, and a mirror image signal of an at least filters to test signal will be made to present The first filter correction coefficient of relative minimum is used as an at least first filter result；And

The second filter correction coefficient is adjusted, and the mirror image signal of an at least filters to test signal will be made to present The second filter correction coefficient of relative minimum is used as an at least second filter result.

17. as claim 16 method, wherein according to adjustment after an at least filter correction coefficient come obtain this first The step of at least tap coefficient for signal path finite impulse response filter also includes：

At least one first signal path frequency response is obtained according to the first filter result and the second filter result； And

18. method according to claim 17, wherein according at least one first signal path frequency response come obtain this first In the step of at least tap coefficient for signal path finite impulse response filter, to be directed at least one first signal Path frequencies response carries out fourier inverse transform, and takes real part to the result of fourier inverse transform, to obtain the transmission end The first signal path finite impulse response filter an at least tap coefficient.

19. a kind of signal bearing calibration, for correcting between the signal path of phase together of a receiver and an orthogonal signal path Mismatch, which is characterized in that include：

In an a receiving terminal extra setup at least frequency mixer correction coefficient for the receiver；

An at least frequency mixer is tested into signal and transmits signal from the output of a transmission end of the receiver for one first, and in loopback The first transmission signal back carries out it spectrum analysis to obtain at least one after this at least a frequency mixer correction coefficient Frequency mixer result of spectrum analysis；

At least frequency mixer correction coefficient that the receiving terminal is adjusted according to an at least frequency mixer result of spectrum analysis, with To a final at least frequency mixer correction coefficient, to correct the one of one first signal path of the receiving terminal of the receiver Mismatch between one second frequency mixer of one second signal path of one frequency mixer and the receiving terminal；And

Additionally carried out come first signal path to the receiving terminal using one first signal path finite impulse response filter One first signal path finite impulse response (FIR) handle, and additionally using one second signal path finite impulse response filter come One second signal path finite impulse response (FIR) processing is carried out to second signal path of the receiving terminal, to correct the receiver One second filter of one first filter of first signal path of the receiving terminal and second signal path of the receiving terminal Mismatch between wave device；

Wherein additionally using the first signal path finite impulse response filter come first signal path to the receiving terminal Carrying out the step of the first signal path finite impulse response (FIR) is handled includes：

Other than original frequency mixer correction coefficient, in addition an at least filter correction coefficient is set in the receiving terminal；

An at least filters to test signal is transmitted into signal for one second from the output of the transmission end of the receiver, and makes loopback Back this second transmission signal after an at least filter correction coefficient for the receiving terminal, it is carried out spectrum analysis with Obtain an at least filter spectrum analysis result；

An at least filter correction coefficient for the receiving terminal is adjusted according to an at least filter spectrum analysis result；

The first signal path finite impulse of the receiving terminal is obtained according at least filter correction coefficient after adjustment An at least tap coefficient for response filter；And

Without an at least filter correction coefficient, by the first signal path finite impulse response filter come to this One signal path carry out the first signal path finite impulse response (FIR) processing, with correct the filter of first signal path with And the mismatch between the filter of second signal path.

20. such as the bearing calibration of claim 19, wherein the receiver is an OFDM modulation receiver.

21. such as the bearing calibration of claim 19, wherein an at least frequency mixer correction coefficient, which includes at least, one first mixing Device correction coefficient and one second frequency mixer correction coefficient, wherein the first frequency mixer correction coefficient are for correcting first news Amplitude number between path and second signal path mismatches；And the second frequency mixer correction coefficient be for correct this The phase of one signal path and second signal path mismatches.

22. such as the bearing calibration of claim 21, wherein at least frequency mixer test signal includes one first frequency mixer school Positive test signal and one second frequency mixer correct test signal, and first frequency mixer correction test signal has one first to mix Frequency device corrects test frequency, and there is second frequency mixer correction test signal one second frequency mixer to correct test frequency；And this One frequency mixer corrects the local oscillator frequencies that test frequency is the receiving terminal and adds a specific frequency and second mixing Device correction test frequency is that the local oscillator frequencies of the receiving terminal subtract the specific frequency.

23. such as the bearing calibration of claim 22, wherein adjusting this at least according to an at least frequency mixer result of spectrum analysis One frequency mixer correction coefficient, to include the step of obtaining a final at least frequency mixer correction coefficient：

24. as claim 19 bearing calibration, wherein additionally using the second signal path finite impulse response filter come Carrying out the step of the second signal path finite impulse response (FIR) is handled to second signal path of the receiving terminal includes：

25. such as the bearing calibration of claim 19, wherein making the second transmission signal that loopback is returned at least through the receiving terminal An at least filter correction coefficient the step of include：

Make loopback return this second transmission signal by the receiving terminal an at least frequency mixer correction coefficient and this at least One filter correction coefficient.

26. such as the bearing calibration of claim 25, wherein an at least filter correction coefficient, which includes at least, one first filtering Device correction coefficient and a second filter correction coefficient, wherein the first filter correction coefficient are for correcting first news Amplitude number between path and second signal path mismatches, and the second filter correction coefficient be for correct this first Phase between signal path and second signal path mismatches.

27. such as the bearing calibration of claim 26, wherein an at least filters to test signal has an at least filter correction Test frequency, and an at least filter correction test frequency is within the frequency range that the receiver to be handled.

28. such as the bearing calibration of claim 27, wherein adjusting the reception according to an at least filter spectrum analysis result End an at least filter correction coefficient the step of include：

29. such as the bearing calibration of claim 28, wherein being somebody's turn to do according at least filter correction coefficient after adjustment The step of at least tap coefficient for first signal path finite impulse response filter includes：

Extremely according to this of at least one second signal path frequency response and a corresponding at least filter correction test frequency Lack a first filter result and an at least second filter result to obtain at least one first signal path frequency response； And

30. such as the bearing calibration of claim 29, wherein in the second signal path finite impulse response (FIR) for finding out the receiving terminal Filter is respectively at least one second signal path frequency response on this at least a filter correction test frequency the step of In, to carry out fourier conversion for an at least tap coefficient for the second signal path finite impulse response filter, with Finding out the second signal path finite impulse response filter, this on this at least a filter correction test frequency be extremely respectively Few one second signal path frequency response；And according at least one first signal path frequency response come obtain this first news In the step of at least tap coefficient for number path finite impulse response filter, to be directed at least one first signal road Diameter frequency response carries out fourier inverse transform, and takes real part to the result of fourier inverse transform, to obtain the receiving terminal An at least tap coefficient for the first signal path finite impulse response filter.

31. such as the bearing calibration of claim 19, wherein making the second transmission signal that loopback is returned at least through the receiving terminal An at least filter correction coefficient the step of include：

Make the second transmission signal that loopback is returned without at least a frequency mixer correction coefficient and the process of the receiving terminal An at least filter correction coefficient.

32. such as the bearing calibration of claim 31, wherein an at least filter correction coefficient, which includes at least, one first filtering Device correction coefficient and a second filter correction coefficient, wherein the first filter correction coefficient are for correcting first news Amplitude number between path and second signal path mismatches, and the second filter correction coefficient be for correct this first Phase between signal path and second signal path mismatches.

33. such as the bearing calibration of claim 32, wherein an at least filters to test signal has an at least filter correction Test frequency, and an at least filter correction test frequency is within the frequency range that the receiver to be handled.

34. such as the bearing calibration of claim 33, wherein adjusting the reception according to an at least filter spectrum analysis result End an at least filter correction coefficient the step of include：

35. such as the bearing calibration of claim 34, wherein being somebody's turn to do according at least filter correction coefficient after adjustment The step of at least tap coefficient for first signal path finite impulse response filter, has additionally comprised：

At least one first is obtained according to the first filter result, the second filter result and the frequency mixer correction coefficient Signal path frequency response；And

36. such as the bearing calibration of claim 35, wherein being somebody's turn to do according at least one first signal path frequency response In the step of at least tap coefficient for first signal path finite impulse response filter, for be directed to this at least one first Signal path frequency response carries out fourier inverse transform, and takes real part to the result of fourier inverse transform, is connect with obtaining this An at least tap coefficient for the first signal path finite impulse response filter of receiving end.

37. a kind of signal means for correcting, for correcting between one first signal path of a conveyer and one second signal path Mismatch, wherein one of first signal path and second signal path is phase signal path together, the first signal road Diameter and the another of second signal path are an orthogonal signal path, which includes：

One frequency mixer correction coefficient unit, is coupled to a transmission end of the conveyer, is set with an at least frequency mixer correction coefficient；

One frequency mixer test signal generation unit, be used for will an at least frequency mixer test signal from the transmission end by this at least one Frequency mixer correction coefficient transmits signal to generate one first；

One spectral analysis unit, for being mixed to carry out spectrum analysis with obtaining at least one to the first transmission signal that loopback is returned Frequency device result of spectrum analysis；

One frequency mixer correction coefficient adjustment unit, for according to an at least frequency mixer result of spectrum analysis come adjust this at least one Frequency mixer correction coefficient, to obtain a final at least frequency mixer correction coefficient, to correct the one of first signal path Mismatch between one frequency mixer and one second frequency mixer of second signal path；And

One finite impulse response filter unit is coupled to the transmission end of the conveyer, is used for additionally utilizing one first signal road Diameter finite impulse response filter to carry out one first signal path finite impulse response (FIR) processing to first signal path, and One second signal path additionally is carried out to second signal path using one second signal path finite impulse response filter Finite impulse response (FIR) handle, with correct first signal path a first filter and second signal path one second Mismatch between filter；

Wherein the spectral analysis unit separately passes through an at least filter correction coefficient for the transmission end simultaneously in the second transmission signal After loopback is returned, spectrum analysis is carried out to it to obtain an at least filter spectrum analysis result, and the means for correcting additionally comprises Have：

One filter correction coefficient elements include an at least filter correction coefficient；

One filters to test signal generation unit is used for an at least filters to test signal is defeated from the transmission end of the conveyer Go out for one second transmission signal；

One filter correction coefficient adjustment unit, for adjusting the transmission end according to an at least filter spectrum analysis result An at least filter correction coefficient；

One tap coefficient calculation unit, for obtaining the transmission end according at least filter correction coefficient after adjusting The first signal path finite impulse response filter an at least tap coefficient；And

One switch unit is used for, without an at least filter correction coefficient, ringing by the first signal path finite impulse Filter is answered to carry out the first signal path finite impulse response (FIR) processing to first signal path, to correct first signal Mismatch between the filter in path and the filter of second signal path.

38. such as the means for correcting of claim 37, wherein the conveyer is an OFDM modulation conveyer.

39. such as the means for correcting of claim 37, wherein an at least frequency mixer correction coefficient, which includes at least, one first mixing Device correction coefficient and one second frequency mixer correction coefficient, wherein the first frequency mixer correction coefficient are for correcting first news Amplitude number between path and second signal path mismatches；And the second frequency mixer correction coefficient be for correct this The phase of one signal path and second signal path mismatches.

40. such as the means for correcting of claim 39, wherein at least frequency mixer test signal includes one first frequency mixer school Positive test signal and one second frequency mixer correct test signal, and first frequency mixer correction test signal has one first to mix Frequency device corrects test frequency, and there is second frequency mixer correction test signal one second frequency mixer to correct test frequency；And this One frequency mixer corrects the local oscillator frequencies that test frequency is the transmission end and adds a specific frequency and second mixing Device correction test frequency is that the local oscillator frequencies of the transmission end subtract the specific frequency.

41. such as the means for correcting of claim 40, wherein the frequency mixer correction coefficient adjustment unit is to adjust first frequency mixer Correction coefficient, and will make first frequency mixer correction test signal a mirror image signal present relative minimum this first Frequency mixer correction coefficient is as one first result；The second frequency mixer correction coefficient is adjusted, and first frequency mixer will be made The second frequency mixer correction coefficient of relative minimum is presented as one second result in the mirror image signal of correction test signal；It adjusts The whole first frequency mixer correction coefficient, and it is opposite that a mirror image signal of second frequency mixer correction test signal will be made to present The first frequency mixer correction coefficient of minimum value is as a third result；The second frequency mixer correction coefficient is adjusted, and will The second frequency mixer correction coefficient that relative minimum is presented in the mirror image signal of second frequency mixer correction test signal is set to make For one the 4th result；And system is corrected to generate final first frequency mixer according to first result and the third result Number, and final the second frequency mixer correction coefficient is generated according to second result and the 4th result.

42. as claim 37 means for correcting, wherein for using a delay circuit string come limited as second signal path Impulse response filter, and the delay circuit string is to carry out a signal delay processing, the wherein news for second signal path One delay time of number delay disposal be correspond to that the first signal path finite impulse response filter carried out this One delay time of one signal path finite impulse response (FIR) processing.

43. such as the means for correcting of claim 37, wherein the spectral analysis unit separately passes through the transmission end in the second transmission signal An at least frequency mixer correction coefficient and after an at least filter correction coefficient and loopback return, frequency spectrum point is carried out to it Analysis is to obtain an at least filter spectrum analysis result.

44. such as the means for correcting of claim 42, wherein an at least filter correction coefficient, which includes at least, one first filtering Device correction coefficient and a second filter correction coefficient；The first filter correction coefficient is for correcting the first signal road Amplitude between diameter and second signal path mismatches；And the second filter correction coefficient is for correcting first news Phase number between path and second signal path mismatches.

45. such as the means for correcting of claim 44, wherein an at least filters to test signal has an at least filter correction Test frequency, and an at least filter correction test frequency is within the frequency range that the conveyer to be handled.

46. such as the means for correcting of claim 45, the wherein filter correction coefficient adjustment unit adjusts the first filter school Positive coefficient, and first filtering of the mirror image signal presentation relative minimum of an at least filters to test signal will be made Device correction coefficient is used as an at least first filter correction coefficient result；And the second filter correction coefficient is adjusted, and will It can make the mirror image signal of an at least filters to test signal that the second filter correction coefficient of relative minimum be presented As an at least second filter correction coefficient result.

47. such as the means for correcting of claim 46, the wherein tap coefficient calculation unit includes：

One second signal path frequency response computing unit finds out the second signal path finite impulse response filter and exists respectively At least one second signal path frequency response in an at least filter correction test frequency；

One main first signal path frequency response computing unit, be used for according at least one second signal path frequency response, An at least first filter correction coefficient result for a corresponding at least filter correction test frequency and this at least 1 the Two filter correction coefficient results, to obtain at least one first signal path frequency response；And

One coefficient calculation unit, at least one first signal path frequency response has to obtain first signal path according to this Limit an at least tap coefficient for impulse response filter.

48. as claim 47 means for correcting, wherein the second signal path frequency response computing unit be for this second An at least tap coefficient for signal path finite impulse response filter carries out fourier conversion, to find out the second signal road Diameter finite impulse response filter at least one second signal path of this on this at least a filter correction test frequency respectively Frequency response；And the coefficient calculation unit is to carry out fourier reversion for at least one first signal path frequency response It changes, and real part is taken to the result of fourier inverse transform, the first signal path finite impulse to obtain the transmission end is rung Answer an at least tap coefficient for filter.

49. such as the means for correcting of claim 37, wherein the spectral analysis unit is separately in the second transmission signal without the transmission At least frequency mixer correction coefficient at end and after an at least filter correction coefficient and loopback are returned, carries out it Spectrum analysis is to obtain an at least filter spectrum analysis result.

50. such as the means for correcting of claim 49, wherein an at least filter correction coefficient, which includes at least, one first filtering Device correction coefficient and a second filter correction coefficient；The first filter correction coefficient is for correcting the first signal road Amplitude between diameter and second signal path mismatches；And the second filter correction coefficient is for correcting first news Phase number between path and second signal path mismatches.

51. such as the means for correcting of claim 50, wherein an at least filters to test signal has an at least filter correction Test frequency, and an at least filter correction test frequency is within the frequency range that the conveyer to be handled.

52. such as the means for correcting of claim 51, the wherein filter correction coefficient adjustment unit adjusts the first filter school Positive coefficient, and first filtering of the mirror image signal presentation relative minimum of an at least filters to test signal will be made Device correction coefficient is used as an at least first filter result；And the second filter correction coefficient is adjusted, and this will be made The second filter correction coefficient of relative minimum is presented as at least in the mirror image signal of an at least filters to test signal One second filter result.

53. such as the means for correcting of claim 52, the wherein tap coefficient calculation unit has additionally comprised：

One the first signal path frequency response computing unit of auxiliary is used for according to the first filter result and second filtering Device result obtains at least one first signal path frequency response；And

54. such as the means for correcting of claim 53, wherein the coefficient calculation unit is at least one first signal path frequency Rate response carries out fourier inverse transform, and takes real part to the result of fourier inverse transform, with obtain the transmission end this An at least tap coefficient for one signal path finite impulse response filter.

55. a kind of signal means for correcting, for correcting between one first signal path of a receiver and one second signal path Mismatch, wherein one of first signal path and second signal path is phase signal path together, the first signal road Diameter and the another of second signal path are an orthogonal signal path, which includes：

One frequency mixer correction coefficient unit, is coupled to a receiving terminal of the receiver, is set with an at least frequency mixer correction coefficient；

One frequency mixer tests signal generation unit, is used for an at least frequency mixer testing signal and be produced from a transmission end of the receiver Raw one first transmission signal；

One spectral analysis unit is right in the first transmission signal that loopback is returned after this at least a frequency mixer correction coefficient It carries out spectrum analysis to obtain an at least frequency mixer result of spectrum analysis；

One frequency mixer correction coefficient adjustment unit, for adjusting the receiving terminal according to an at least frequency mixer result of spectrum analysis An at least frequency mixer correction coefficient, to obtain a final at least frequency mixer correction coefficient, to correct the receiver Between one frequency mixer of one frequency mixer of first signal path of the receiving terminal and second signal path of the receiving terminal Mismatch；And

One finite impulse response filter unit is coupled to the receiving terminal of the receiver, is used for additionally utilizing one first signal road Diameter finite impulse response filter to carry out one first signal path finite impulse sound to first signal path of the receiving terminal It should handle, and additionally using one second signal path finite impulse response filter come the second signal road to the receiving terminal Diameter carries out one second signal path finite impulse response (FIR) processing, to correct first signal path of the receiving terminal of the receiver A filter and the receiving terminal second signal path a filter between mismatch；

At least filters to test signal that wherein spectral analysis unit separately receives the receiving terminal of the receiver carries out Spectrum analysis, to obtain an at least filter spectrum analysis result, and the means for correcting has additionally comprised：

One filters to test signal generation unit, for transmitting an at least filters to test signal to the reception from the transmission end The receiving terminal of device, and by an at least filter correction coefficient for the receiving terminal；

One filter correction coefficient adjustment unit, for adjusting the receiving terminal according to an at least filter spectrum analysis result An at least filter correction coefficient；

One tap coefficient calculation unit, for obtaining the receiving terminal according at least filter correction coefficient after adjusting The first signal path finite impulse response filter an at least tap coefficient；And

56. such as the means for correcting of claim 55, wherein the receiver is an OFDM modulation receiver.

57. such as the means for correcting of claim 55, wherein an at least frequency mixer correction coefficient, which includes at least, one first mixing Device correction coefficient and one second frequency mixer correction coefficient, wherein the first frequency mixer correction coefficient are for correcting first news Amplitude number between path and second signal path mismatches；And the second frequency mixer correction coefficient be for correct this The phase of one signal path and second signal path mismatches.

58. such as the means for correcting of claim 57, wherein at least frequency mixer test signal includes one first frequency mixer school Positive test signal and one second frequency mixer correct test signal, and first frequency mixer correction test signal has one first to mix Frequency device corrects test frequency, and there is second frequency mixer correction test signal one second frequency mixer to correct test frequency；And this One frequency mixer corrects the local oscillator frequencies that test frequency is the receiving terminal and adds a specific frequency and second mixing Device correction test frequency is that the local oscillator frequencies of the receiving terminal subtract the specific frequency.

59. such as the means for correcting of claim 58, the wherein frequency mixer correction coefficient adjustment unit adjusts the first frequency mixer school Positive coefficient, and will make a mirror image signal of first frequency mixer correction test signal present relative minimum this is first mixed Frequency device correction coefficient is as one first result；The second frequency mixer correction coefficient is adjusted, and the first frequency mixer school will be made The second frequency mixer correction coefficient of relative minimum is presented as one second result in the mirror image signal of positive test signal；Adjustment The first frequency mixer correction coefficient, and a mirror image signal of second frequency mixer correction test signal will be made to present relatively most The first frequency mixer correction coefficient of small value is as a third result；The second frequency mixer correction coefficient is adjusted, and will be made The second frequency mixer correction coefficient conduct of relative minimum is presented in the mirror image signal of second frequency mixer correction test signal One the 4th result；And final the first frequency mixer correction coefficient is generated according to first result and the third result, And final the second frequency mixer correction coefficient is generated according to second result and the 4th result.

60. as claim 55 means for correcting, wherein for using a delay circuit string come limited as second signal path Impulse response filter, and the delay circuit string is to carry out a signal delay processing, the wherein news for second signal path One delay time of number delay disposal be correspond to that the first signal path finite impulse response filter carried out this One delay time of one signal path finite impulse response (FIR) processing.

61. such as the means for correcting of claim 55, the wherein filters to test signal generation unit is further utilized to from the transmission An at least filters to test signal is transmitted to the receiving terminal of the receiver in end, and at least one mixed by this of the receiving terminal Frequency device correction coefficient and an at least filter correction coefficient.

62. such as the means for correcting of claim 60, wherein an at least filter correction coefficient, which includes at least, one first filtering Device correction coefficient and a second filter correction coefficient, wherein the first filter correction coefficient are for correcting first news Amplitude number between path and second signal path mismatches, and the second filter correction coefficient be for correct this first Phase between signal path and second signal path mismatches.

63. such as the means for correcting of claim 62, wherein an at least filters to test signal has an at least filter correction Test frequency, and an at least filter correction test frequency is within the frequency range that the receiver to be handled.

64. such as the means for correcting of claim 63, the wherein filter correction coefficient adjustment unit adjusts the first filter school Positive coefficient, and first filtering of the mirror image signal presentation relative minimum of an at least filters to test signal will be made Device correction coefficient is used as an at least first filter correction coefficient result；And the second filter correction coefficient is adjusted, and will It can make the mirror image signal of an at least filters to test signal that the second filter correction coefficient of relative minimum be presented As an at least second filter correction coefficient result.

65. such as the means for correcting of claim 64, the wherein tap coefficient calculation unit includes：

One second signal path frequency response computing unit, for finding out the second signal path finite impulse response filter point At least one second signal path frequency response not on this at least a filter correction test frequency；

One main first signal path frequency response computing unit, be used for according at least one second signal path frequency response with And a corresponding at least filter correction test frequency an at least first filter correction coefficient result and this at least one Second filter correction coefficient result obtains at least one first signal path frequency response；And

66. as claim 65 means for correcting, wherein the orthogonal signal path frequencies response computation unit be for this second An at least tap coefficient for signal path finite impulse response filter carries out fourier conversion, to find out the second signal road Diameter finite impulse response filter at least one second signal path of this on this at least a filter correction test frequency respectively Frequency response；And the coefficient calculation unit is to carry out fourier reversion for at least one first signal path frequency response It changes, and real part is taken to the result of fourier inverse transform, the first signal path finite impulse to obtain the receiving terminal is rung Answer an at least tap coefficient for filter.

67. such as the means for correcting of claim 55, the wherein filters to test signal generation unit is further utilized to from the transmission End transmit an at least filters to test signal to the receiver the receiving terminal, and without the receiving terminal this at least one Frequency mixer correction coefficient and pass through an at least filter correction coefficient.

68. such as the means for correcting of claim 67, wherein an at least filter correction coefficient, which includes at least, one first filtering Device correction coefficient and a second filter correction coefficient, wherein the first filter correction coefficient are for correcting first news Amplitude number between path and second signal path mismatches, and the second filter correction coefficient be for correct this first Phase between signal path and second signal path mismatches.

69. such as the means for correcting of claim 68, wherein an at least filters to test signal has an at least filter correction Test frequency, and an at least filter correction test frequency is within the frequency range that the receiver to be handled.

70. such as the means for correcting of claim 69, the wherein filter correction coefficient adjustment unit adjusts the first filter school Positive coefficient, and first filtering of the mirror image signal presentation relative minimum of an at least filters to test signal will be made Device correction coefficient is used as an at least first filter result；And the second filter correction coefficient is adjusted, and this will be made The second filter correction coefficient of relative minimum is presented as at least in the mirror image signal of an at least filters to test signal One second filter result.

71. such as the means for correcting of claim 70, the wherein tap coefficient calculation unit has additionally comprised：

One the first signal path frequency response computing unit of auxiliary, is used for according to the first filter result, the second filter As a result and the frequency mixer correction coefficient obtains at least one first signal path frequency response；And

72. such as the means for correcting of claim 71, wherein the coefficient calculation unit is at least one first signal path frequency Rate response carries out fourier inverse transform, and takes real part to the result of fourier inverse transform, with obtain the receiving terminal this An at least tap coefficient for one signal path finite impulse response filter.