Signal transmission device and method with mismatch correction mechanism

Abstract

The invention relates to a signal transmission device and method with a mismatch correction mechanism. The invention discloses a signal transmission device with a mismatch correction mechanism. The input circuit performs input signal processing on a first fundamental frequency signal and a second fundamental frequency signal which are orthogonal to each other and form a plurality of fundamental frequency signals according to the compensation parameter so as to generate an input fundamental frequency signal. The frequency raising circuit enables an input fundamental frequency signal to be subjected to frequency raising signal processing through two signal processing paths with the same structure and then to be superposed to generate an output radio frequency signal. The feedback circuit performs feedback signal processing on the output radio frequency signal to generate a feedback signal. The correction operation circuit enables the input circuit to set the compensation parameter as a plurality of parameter values, and obtains a plurality of feedback values corresponding to the feedback signal from the feedback circuit, so as to solve the mismatching parameter between the two signal processing paths according to the parameter values and the feedback value pair, so that the input circuit corrects the compensation parameter according to the mismatching parameter.

Description

Technical Field

[0001] The present invention relates to signal transmission technology, and more particularly to a signal transmission device and method with a mismatch correction mechanism. Background Art

[0002] In wireless communication devices, baseband circuits provide complex baseband signals to signal transmitters. The real and imaginary parts of the baseband signals are processed by different signal paths in the signal transmitter, and then modulated to generate analog radio frequency (RF) signals, which are then transmitted by antennas.

[0003] Ideally, different signal paths of a signal transmission device contain the same components and are matched to each other. However, due to process, temperature, voltage or other variation factors, different signal paths often have amplitude or phase mismatches, which in turn degrades the signal quality of the RF signal. Summary of the invention

[0004] In view of the problems of the prior art, one object of the present invention is to provide a signal transmission device and method with a mismatch correction mechanism to improve the prior art.

[0005] The present invention includes a signal transmission device with a mismatch correction mechanism, including: an input circuit, a frequency-upgrading circuit, a feedback circuit, and a correction operation circuit. The input circuit is configured to perform input signal processing on a first baseband signal and a second baseband signal that are orthogonal to each other and form a complex number baseband signal according to a compensation parameter to generate an input baseband signal. The frequency-upgrading circuit is configured to perform frequency-upgrading signal processing on the input baseband signal through two signal processing paths with the same structure and then superimpose them on each other to generate an output radio frequency signal, wherein a mismatch phenomenon equivalent to a mismatch parameter exists between the two signal processing paths. The feedback circuit is configured to perform feedback signal processing on the output radio frequency signal to generate a feedback signal, wherein the feedback signal is a function of the complex number baseband signal through input signal processing, frequency-upgrading signal processing, and feedback signal processing, and the function includes a compensation parameter and a mismatch parameter. The correction operation circuit is configured to enable the input circuit to set the compensation parameter to multiple parameter values, and obtain multiple feedback values ​​corresponding to the feedback signal from the feedback circuit, so as to solve the mismatch parameter according to the multiple parameter values ​​and the multiple feedback values, so that the input circuit can correct the compensation parameter according to the mismatch parameter.

[0006] The present invention further includes a signal transmission method with a mismatch correction mechanism, which is applied to a signal transmission device, comprising: an input circuit performs input signal processing on a first baseband signal and a second baseband signal that are orthogonal to each other and form a complex baseband signal according to a compensation parameter to generate an input baseband signal; an up-conversion circuit causes the input baseband signal to be processed through two signal processing paths with the same structure and then superimposed on each other to generate an output radio frequency signal, wherein there is a mismatch phenomenon between the two signal processing paths that is equivalent to a mismatch parameter; a feedback circuit performs up-conversion signal processing on the input baseband signal through two signal processing paths with the same structure and then superimposes the two signal processing paths to generate an output radio frequency signal. Feedback signal processing is performed on the output radio frequency signal to generate a feedback signal, wherein the feedback signal is a function of a complex baseband signal through input signal processing, up-conversion signal processing and feedback signal processing, and the function includes a compensation parameter and a mismatch parameter; a correction operation circuit enables the input circuit to set the compensation parameter to a plurality of parameter values, and obtains a plurality of feedback values ​​corresponding to the feedback signal from the feedback circuit, so as to solve the mismatch parameter according to the plurality of parameter values ​​and the plurality of feedback values; and the input circuit corrects the compensation parameter according to the mismatch parameter.

[0007] The features, implementation and effects of the present invention are described in detail below with reference to the drawings as preferred embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A block diagram showing a signal transmission device with a mismatch correction mechanism in one embodiment of the present invention;

[0009] Figure 2 A structural diagram showing an equivalent model of a signal transmission device in one embodiment of the present invention;

[0010] Figure 3A A schematic diagram showing an output radio frequency signal in the frequency domain in one embodiment of the present invention;

[0011] Figure 3B A schematic diagram showing a feedback signal in the frequency domain according to an embodiment of the present invention; and

[0012] Figure 4 A flowchart showing a more detailed operation process of a parameter adjustment module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] One object of the present invention is to provide a signal transmission device and method with a mismatch correction mechanism, wherein a correction operation circuit is used to set a compensation parameter to a plurality of parameter values ​​in an input circuit, and a plurality of feedback values ​​corresponding to a feedback signal are obtained from a feedback circuit, so as to solve the mismatch parameter of the signal processing path for a function equivalent to the signal processing path of the signal transmission device. The input circuit then corrects the compensation parameter according to the mismatch parameter, thereby achieving a fast and accurate mismatch correction result.

[0014] Please also refer to Figure 1 as well as Figure 2 . Figure 1 A block diagram of a signal transmission device 100 with a mismatch correction mechanism according to an embodiment of the present invention is shown. Figure 2 FIG. 2 is a structural diagram showing an equivalent model 200 of the signal transmission device 100 according to an embodiment of the present invention.

[0015] Figure 1 The signals processed by each component in the signal transmission device 100 are all real signals. More specifically, the signal transmission device 100 is configured to receive a first baseband signal SZI and a second baseband signal SZQ which are orthogonal to each other, and to generate an output RF signal SB after signal processing by each internal component.

[0016] Figure 2 The signal processed by each component in the equivalent model 200 of the signal transmission device 100 is a complex number signal. In more detail, due to the 90-degree phase difference, the first baseband signal SZI and the second baseband signal SZQ can form a complex number baseband signal SZ and feed into Figure 2 The equivalent model is 200. Figure 2 The equivalent model 200 may be used to describe the equivalent processing performed by each element in the signal transmission device 100 on a complex signal.

[0017] The following will be interleaved Figure 1 as well as Figure 2 , the structure and operation of the signal transmission device 100 are described.

[0018] like Figure 1 As shown, the signal transmission device 100 includes an input circuit 105 , a frequency up-conversion circuit 110 , a feedback circuit 115 and a calibration operation circuit 120 .

[0019] The input circuit 105 is configured to perform input signal processing on the first baseband signal SZI and the second baseband signal SZQ which are orthogonal to each other and form a complex baseband signal SZ according to the compensation parameter CC to generate an input baseband signal SA.

[0020] In one embodiment, each of the first baseband signal SZI and the second baseband signal SZQ is a single tone signal with a frequency of ω and is orthogonal to each other. For example, the first baseband signal SZI and the second baseband signal SZQ can be represented by cos(ωt) and sin(ωt), respectively. The complex baseband signal SZ formed by the first baseband signal SZI and the second baseband signal SZQ can be represented by exp(jωt).

[0021] like Figure 2 As shown, the input signal processing performed by the input circuit 105 can be equivalent to the input signal processing unit 210A included in the equivalent model 200. The input signal processing unit 210A includes a conjugate operation unit 220A, a multiplication unit 230A, and an addition unit 240A.

[0022] More specifically, the input signal processing performed by the input circuit 105 includes firstly performing a conjugate operation on the complex baseband signal SZ by the conjugate operation unit 220A to generate a conjugate operation result CO1, and then multiplying the conjugate operation result CO1 by the compensation parameter CC by the multiplication unit 230A to generate a processed signal PS1.

[0023] Next, the input signal processing performed by the input circuit 105 includes the adding unit 240A adding the complex baseband signal SZ and the processed signal PS1 to generate the input baseband signal SA′.

[0024] In one embodiment, the input signal processing performed by the input circuit 105 may also include adjusting the size of the input baseband signal SA′ according to the gain G0 to generate the input baseband signal SA, and the size adjustment may be performed by the amplifying unit 250A further included in the input signal processing unit 210A.

[0025] Therefore, the input baseband signal SA generated by the input signal processing and amplification performed by the input circuit 105 can be expressed as:

[0026] SA=G0×SA′=G0×[SZ+CC×CO1]=G0×[exp(jωt)+CC×exp(-jωt)] (Equation 1)

[0027] Please refer again Figure 1 . Figure 1 The up-conversion circuit 110 performs up-conversion signal processing on the input baseband signal SA through two signal processing paths PAA and PAB with the same structure and then superimposes the two signals to generate an output radio frequency signal SB.

[0028] In one embodiment, the signal processing path PAA includes a digital-to-analog conversion circuit 125A (in Figure 1 DAC), low-pass filter circuit 125B (in Figure 1 The mixing circuit 125C is used to perform digital-to-analog conversion, low-pass filtering, up-conversion, or a combination of up-conversion signal processing on the real part SAI of the input baseband signal SA in sequence to generate an up-conversion signal USI. The mixing circuit 125C can perform up-conversion according to the carrier CAI to generate a frequency of ω+L O The up-conversion signal USI.

[0029] Similarly, the signal processing path PAB includes a digital-to-analog conversion circuit 130A (in Figure 1 DAC), low-pass filter circuit 130B (in Figure 1 The mixing circuit 130C is used to perform digital-to-analog conversion, low-pass filtering, and up-conversion or a combination of up-conversion signal processing on the imaginary part SAQ of the input baseband signal SA in sequence to generate an up-conversion signal USQ. The mixing circuit 130C can perform up-conversion according to the carrier CAQ whose phase is orthogonal to the carrier CAI to generate a frequency of ω+L O The up-converted signal USQ.

[0030] In one embodiment, the carrier CAI and the carrier CAQ are generated by a carrier generation circuit 135 further included in the signal transmission device 100 .

[0031] More specifically, the carrier generation circuit 135 includes a phase lock loop (PLL) circuit 140A (in Figure 1 denoted as PLL) and phase modulation circuit 140B (in Figure 1 The phase-locked loop circuit 140A is configured to generate a carrier CA, and the phase modulation circuit 140B further performs 0 degree and 90 degree phase modulation on the carrier CA to generate mutually orthogonal carriers CAI and CAQ.

[0032] It should be noted that although the signal processing paths PAA and PAB include the same circuit and have the same structure, there will be a mismatch between the signal processing paths PAA and PAB due to process, temperature, voltage or other variation factors.

[0033] In this embodiment, the up-conversion circuit 110 further includes a superposition circuit 145 configured to superpose the up-conversion signals USI and USQ generated by the signal processing paths PAA and PAB to generate an output RF signal SB.

[0034] like Figure 2 As shown, the up-conversion signal processing performed by the up-conversion circuit 110 can be equivalent to the up-conversion signal processing unit 210B included in the equivalent model 200. The up-conversion signal processing unit 210B includes a conjugate operation unit 220B, a multiplication unit 230B and an addition unit 240B.

[0035] More specifically, the up-conversion signal processing performed by the up-conversion circuit 110 first involves the conjugate operation unit 220B performing a conjugate operation on the input baseband signal SA to generate a conjugate operation result CO2, and then the multiplication unit 230B multiplies the conjugate operation result CO2 by the mismatch parameter CI to generate a processed signal PS2.

[0036] The mismatch parameter CI is used to Figure 1 The mismatch phenomenon between the signal processing paths PAA and PAB is shown in FIG. 1 . In an ideal situation where the signal processing paths PAA and PAB are completely matched, the mismatch parameter CI is 0. However, in actual situations, the mismatch parameter CI has a non-zero value.

[0037] Next, the up-conversion signal processing performed by the up-conversion circuit 110 is performed by adding the input baseband signal SA and the processed signal PS2 by the adding unit 240B to generate the output RF signal SB′.

[0038] In one embodiment, the up-conversion signal processing performed by the up-conversion circuit 110 may also include adjusting the size of the output RF signal SB′ according to the gain G1, and the size adjustment may be performed by the amplifying unit 250B further included in the up-conversion signal processing unit 210B.

[0039] Therefore, the output RF signal SB generated by the up-conversion signal processing and amplification performed by the up-conversion circuit 110 can be expressed as:

[0040] SB=G1×SB′=G1×[SA+CI×CO2] (Formula 2)

[0041] In one embodiment, assuming that the gain G0 and the gain G1 are both 1, the output RF signal SB can be expressed as:

[0042] SB=(exp(jωt)+CC×exp(-jωt))+CI×(exp(jωt)+CC×exp(-jωt))*

[0043] =(1+CI×CC*)×exp(jωt)+(CI+CC)×exp(-jωt) (Equation 3)

[0044] Please refer again Figure 1 . Figure 1 The feedback circuit 115 performs feedback signal processing on the output RF signal SB to generate a feedback signal SC. In one embodiment, the signal transmission device 100 may additionally include an amplifier circuit (not shown) between the upconversion circuit 110 and the feedback circuit 115, so that the output RF signal SB is amplified before being processed by the feedback circuit 115.

[0045] In one embodiment, the feedback circuit 115 includes a multiplication circuit 150A, an analog-to-digital conversion circuit 150B (in Figure 1 The feedback circuit 115 may perform a feedback signal processing including a self-multiplication operation processing, an analog-to-digital conversion processing or a combination thereof on the output RF signal SB.

[0046] In one embodiment, the feedback circuit 115 may also selectively include an amplifier circuit 150C (in Figure 1 The processing result of the multiplication circuit 150A is amplified by the analog-to-digital conversion circuit 150B, and then the analog-to-digital conversion circuit 150B performs analog-to-digital conversion processing.

[0047] like Figure 2 As shown, the feedback signal processing performed by the feedback circuit 115 can be equivalent to the feedback signal processing unit 210C included in the equivalent model 200. The feedback signal processing unit 210C includes a conjugate operation unit 220C and a multiplication unit 230C.

[0048] More specifically, the feedback signal processing performed by the feedback circuit 115 first involves the conjugate operation unit 220C performing a conjugate operation on the output RF signal SB to generate the processed signal PS3. Next, the feedback signal processing performed by the feedback circuit 115 includes the multiplication unit 230C multiplying the output RF signal SB and the processed signal PS3 to generate the feedback signal SC′.

[0049] In one embodiment, the feedback signal processing performed by the feedback circuit 115 may also include adjusting the magnitude of the feedback signal SC′ according to the gain G2, and the magnitude adjustment may be performed by the amplifying unit 250C further included in the feedback signal processing unit 210C.

[0050] Therefore, the feedback signal SC generated by the feedback signal processing and amplification performed by the feedback circuit 115 can be expressed as:

[0051] SC=G2×SC′=G2×[SB×PS3] (Formula 4)

[0052] In one embodiment, assuming that the gain G0, the gain G1 and the gain G2 are all 1, the feedback signal SC can be further expressed as:

[0053] SC=SB×PS3=(SA+CI×CO2)×(SA+CI×CO2)*

[0054] =((SZ+CC×CO1)+CI×(SZ+CC×CO1)*)×((SZ+CC×CO1)+CI×(SZ+CC×CO1)*)*

[0055] =f(CC,CI) (Formula 5)

[0056] From (Equation 5), it can be seen that the value of the feedback signal SC is a function f(CC, CI) of the complex baseband signal SZ through input signal processing, up-conversion signal processing and feedback signal processing, and the variables of the function f(CC, CI) include the compensation parameter CC and the mismatch parameter CI.

[0057] Please refer again Figure 1 . Figure 1 The correction operation circuit 120 is configured to enable the input circuit 105 to set the compensation parameter CC to multiple parameter values ​​to obtain multiple feedback values ​​of the feedback signal SC, and then solve the mismatch parameter CI according to the multiple parameter values ​​and the multiple feedback values, so that the input circuit 105 corrects the compensation parameter CC according to the mismatch parameter CI.

[0058] Since the calibration operation circuit 120 does not affect the input signal processing, up-conversion signal processing and feedback signal processing, it is not seen in Figure 2 The equivalent model is 200.

[0059] In one embodiment, the calibration operation circuit 120 may enable the input circuit 105 to set the compensation parameter CC to two parameter values ​​in sequence, so as to sequentially obtain two feedback values ​​of the feedback signal SC to solve the function for the mismatch parameter CI.

[0060] In more detail, the calibration operation circuit 120 firstly enables the input circuit 105 to set the compensation parameter CC to the first parameter value CC1 and obtain the first feedback value SC1 of the feedback signal SC, which can be expressed as:

[0061] SC1=f(CC1,CI) (Formula 5)

[0062] The calibration operation circuit 120 then causes the input circuit 105 to set the compensation parameter CC to the second parameter value CC2 and obtain the second feedback value SC2 of the feedback signal SC, which can be expressed as:

[0063] SC2=f(CC2,CI) (Formula 6)

[0064] The calibration operation circuit 120 can solve the simultaneous equations according to (Equation 5) and (Equation 6) to obtain the value of the mismatch parameter CI.

[0065] Please refer to Figure 3A as well as Figure 3B . Figure 3A FIG. 4 is a schematic diagram showing an output radio frequency signal SB in the frequency domain according to an embodiment of the present invention. Figure 3B A schematic diagram showing a feedback signal SC in the frequency domain in one embodiment of the present invention. Figure 3A as well as Figure 3B In the figure, the horizontal axis is frequency and the vertical axis is signal size.

[0066] Since the first baseband signal SZI and the second baseband signal SZQ are single-frequency signals with a frequency of ω, it can be seen from (Equation 3) that when the mismatch parameter CI has a non-zero value and the compensation parameter CC is set to 0, the output RF signal SB will include Figure 3AThe real signal SIG and the non-zero imaginary signal IMG in (3) correspond to the term "(1+CI×CC*)×exp(jωt)" and the frequency L O +ω, the imaginary signal IMG corresponds to the term "(CI+CC)×exp(-jωt)" in (Equation 3) and corresponds to the frequency L O -ω.

[0067] Furthermore, the real signal SIG and the non-zero imaginary signal IMG will make the feedback signal SC include Figure 3B In addition to the DC component DC with a frequency of 0, it also includes non-DC components NDC1 and NDC2, wherein the non-DC component NDC1 corresponds to a frequency of 2ω, and the non-DC component NDC2 corresponds to a frequency of -2ω. Therefore, in different embodiments, the calibration operation circuit 120 can obtain multiple feedback values ​​of the feedback signal SC according to the power or Fourier transform result of one of the non-DC component NDC1 and the non-DC component NDC2 of the feedback signal SC. These feedback values ​​correspond to a non-DC component of the feedback signal SC respectively.

[0068] In one embodiment, when the compensation parameter CC is the additive inverse of the mismatch parameter CI, that is, CC=-CI, the imaginary signal in (Equation 3) may be 0. Therefore, the input circuit 105 may set the compensation parameter CC to the additive inverse of the mismatch parameter CI for calibration to achieve the best calibration effect.

[0069] In one embodiment, when the signal transmission device 100 is initially operated, when the filtering bandwidth of the low-pass filtering circuits 125B and 130B is changed, or when the carrier frequency of the mixing circuits 125C and 130C is changed, the correction operation circuit 120 can perform the above-mentioned correction mechanism to achieve the purpose of correcting the mismatch of the signal processing paths PAA and PAB.

[0070] The output RF signal SB may be amplified by, for example, but not limited to, the amplifier circuit 190 and then transmitted through the antenna 195. The amplifier circuit 190 and the antenna 195 may be selectively disposed outside the signal transmission device 100, or may be disposed as a part of the signal transmission device 100.

[0071] In some technologies, the signal transmission device is not equipped with a mismatch correction mechanism. Therefore, the output RF signal will contain an imaginary signal due to the mismatch of the signal path, resulting in a degradation of the signal quality.

[0072] The signal transmission device with a mismatch correction mechanism in the present invention can use a correction operation circuit to enable the input circuit to set the compensation parameter to a plurality of parameter values, and obtain a plurality of feedback values ​​corresponding to the feedback signal from the feedback circuit, so as to solve the mismatch parameter of the signal processing path by a function equivalent to the signal processing path of the signal transmission device, and then enable the input circuit to correct the compensation parameter according to the mismatch parameter, thereby achieving a fast and accurate mismatch correction result.

[0073] Please refer to Figure 4 . Figure 4 FIG. 4 is a flow chart showing a signal transmission method 400 with a mismatch correction mechanism according to an embodiment of the present invention.

[0074] In addition to the aforementioned device, the present invention further discloses a signal transmission method 400 with a mismatch correction mechanism, which is applied to, for example, but not limited to Figure 1 In the signal transmission device 100. One embodiment of the signal transmission method 400 is as follows Figure 4 As shown, the following steps are included.

[0075] In step S410 , the input circuit 105 performs input signal processing on the first baseband signal SZI and the second baseband signal SZQ, which are orthogonal to each other and form a complex baseband signal SZ, according to the compensation parameter CC to generate an input baseband signal SA.

[0076] In step S420, the up-conversion circuit 110 up-converts the input baseband signal SA through two signal processing paths PAA and PAB of the same structure and then superimposes the up-conversion signals to generate an output RF signal SB, wherein a mismatch phenomenon equivalent to a mismatch parameter CI exists between the two signal processing paths PAA and PAB.

[0077] In step S430 , the feedback circuit 115 performs feedback signal processing on the output RF signal SB to generate a feedback signal SC, wherein the feedback signal SC is a function of the complex baseband signal SZ through input signal processing, up-conversion signal processing and feedback signal processing, and the function includes a compensation parameter CC and a mismatch parameter CI.

[0078] In step S440 , the calibration operation circuit 120 enables the input circuit 105 to set the compensation parameter CC to multiple parameter values, and obtain multiple feedback values ​​corresponding to the feedback signal SC from the feedback circuit 115 to solve the mismatch parameter CI according to the multiple parameter values ​​and the multiple feedback value pair functions.

[0079] In step S450 , the compensation parameter CC is corrected by the input circuit 105 according to the mismatch parameter CI.

[0080] It should be noted that the above implementation is only an example. In other embodiments, those skilled in the art may make changes without violating the spirit of the present invention. For example, Figure 1 Each circuit for transmitting and processing the complex baseband signal SZ may include different elements and structures, so that the function is not necessarily equal to the form in the above embodiment. In addition, the calibration operation circuit 120 may also solve the mismatch parameter in other ways, or calibrate the compensation parameter according to the mismatch parameter in different ways. The present invention is not limited to this.

[0081] In summary, the signal transmission device and method with a mismatch correction mechanism in the present invention can enable the input circuit to set the compensation parameter to a plurality of parameter values ​​through the correction operation circuit, and obtain a plurality of feedback values ​​corresponding to the feedback signal from the feedback circuit, so as to solve the mismatch parameter of the signal processing path for a function equivalent to the signal processing path of the signal transmission device, thereby enabling the input circuit to correct the compensation parameter according to the mismatch parameter, thereby achieving a fast and accurate mismatch correction result.

[0082] Although the embodiments of the present case are described above, these embodiments are not intended to limit the present case. A person skilled in the art may make changes to the technical features of the present case based on the explicit or implicit contents of the present case. All these changes may fall within the scope of patent protection sought in the present case. In other words, the scope of patent protection in the present case shall be subject to the scope of the patent application defined in this specification.

[0083]

Explanation of symbols

[0084] 100:Signal transmission device

[0085] 105: Input circuit

[0086] 110: frequency up-conversion circuit

[0087] 115: Feedback Circuit

[0088] 120: Correction operation circuit

[0089] 125A, 130A: Digital to Analog Conversion Circuit

[0090] 125B, 130B: Low-pass filter circuit

[0091] 125C, 130C: Mixing circuit

[0092] 135: Carrier generating circuit

[0093] 140A: Phase-locked loop circuit

[0094] 140B: Phase modulation circuit

[0095] 145:Superposition Circuit

[0096] 150A:Multiplication circuit

[0097] 150B: Analog to digital conversion circuit

[0098] 150C: Amplifier circuit

[0099] 190: Amplifier circuit

[0100] 195: Antenna

[0101] 200: Equivalent model

[0102] 210A: Input signal processing unit

[0103] 210B: Upsampling signal processing

[0104] 210C: Feedback signal processing unit

[0105] 220A, 220B, 220C: conjugate operation unit

[0106] 230A, 230B, 230C: Multiplication unit

[0107] 240A, 240B: Addition unit

[0108] 250A, 250B, 250C: Amplification unit

[0109] 400:Signal transmission method

[0110] S410~S450: Steps

[0111] CA, CAI, CAQ: Carrier

[0112] CC: Compensation parameters

[0113] CC1: The first parameter value

[0114] CC2: Second parameter value

[0115] CI:Mismatched parameters

[0116] CO1, CO2: conjugate operation results

[0117] DC: DC component

[0118] G0, G1, G2: Gain

[0119] IMG: Imaginary signal

[0120] NDC1, NDC2: Non-DC component

[0121] PAA, PAB: Signal Processing Path

[0122] PS1, PS2, PS3: processed signal

[0123] SA, SA': input baseband signal

[0124] SAI: Real part

[0125] SAQ: Imaginary part

[0126] SB, SB': output RF signal

[0127] SC, SC': Feedback signal

[0128] SC1: First feedback value

[0129] SC2: Second feedback value

[0130] SIG: Real signal

[0131] SZ: Complex baseband signal

[0132] SZI: First baseband signal

[0133] SZQ: Second baseband signal

[0134] USI, USQ: Up-converter signal

Claims

1. A signal transmission device with a mismatch correction mechanism, comprising: An input circuit configured to perform an input signal processing on a first baseband signal and a second baseband signal that are orthogonal to each other and form a complex number baseband signal according to a compensation parameter to generate an input baseband signal; An up-conversion circuit is configured to cause the input baseband signal to be processed by an up-conversion signal through two signal processing paths of the same structure and then be superimposed on each other to generate an output radio frequency signal, wherein a mismatch phenomenon equivalent to a mismatch parameter exists between the two signal processing paths; a feedback circuit configured to perform a feedback signal processing on the output RF signal to generate a feedback signal, wherein the feedback signal is a function of the complex baseband signal through the input signal processing, the up-converted signal processing and the feedback signal processing, and the function includes the compensation parameter and the mismatch parameter; and A correction operation circuit is configured to enable the input circuit to set the compensation parameter to a plurality of parameter values, and obtain a plurality of feedback values ​​corresponding to the feedback signal from the feedback circuit, so as to solve the mismatch parameter for the function according to the plurality of parameter values ​​and the plurality of feedback values, so that the input circuit corrects the compensation parameter according to the mismatch parameter. 2 . The signal transmission device according to claim 1 , wherein the input circuit sets the compensation parameter to an additive inverse of the mismatch parameter for correction.

3. The signal transmission device according to claim 1, wherein each of the two signal processing paths comprises a digital-to-analog conversion circuit, a low-pass filtering circuit, a mixing circuit or a combination thereof, so that each of the two signal processing paths generates an up-converted signal after performing the up-converted signal processing comprising a digital-to-analog conversion process, a low-pass filtering process, an up-converting process or a combination thereof; The up-conversion circuit further includes a superposition circuit configured to superpose the up-conversion signals generated by the two signal processing paths to generate the output radio frequency signal.

4. The signal transmission device according to claim 3, wherein the calibration operation circuit performs calibration when the signal transmission device is initially operated, when a filtering bandwidth of the low-pass filtering circuit is changed, or when a carrier frequency of the mixing circuit is changed.

5. The signal transmission device according to claim 1, wherein the feedback circuit comprises a multiplication circuit, an analog-to-digital conversion circuit or a combination thereof, so that the feedback circuit performs the feedback signal processing including a self-multiplication operation processing, an analog-to-digital conversion processing or a combination thereof on the output RF signal.

6. The signal transmission device according to claim 1, wherein the input signal processing performed by the input circuit is equivalently configured to: Performing a conjugate operation on the complex baseband signal and multiplying the signal by the compensation parameter to generate a processed signal; and The complex baseband signal and the processed signal are superimposed to generate the input baseband signal.

7. The signal transmission device according to claim 1, wherein the up-conversion signal processing of the up-conversion circuit is equivalently configured to: Performing a conjugate operation on the input baseband signal and multiplying the input baseband signal by the mismatch parameter to generate a processed signal; and The input baseband signal and the processed signal are superimposed to generate the output radio frequency signal.

8. The signal transmission device according to claim 1, wherein the feedback signal processing performed by the feedback circuit is equivalently configured to: performing a conjugate operation on the output RF signal to generate a processed signal; and The output RF signal and the processed signal are multiplied to generate the feedback signal.

9. The signal transmission device according to claim 1, wherein the calibration operation circuit obtains the plurality of feedback values ​​according to a power or a Fourier transform result of the feedback signal, wherein each of the first baseband signal and the second baseband signal is a single tone signal, and the plurality of feedback values ​​respectively correspond to a non-DC component of the feedback signal.

10. A signal transmission method with a mismatch correction mechanism, applied to a signal transmission device, comprising: An input circuit performs an input signal processing on a first baseband signal and a second baseband signal that are orthogonal to each other and form a complex baseband signal according to a compensation parameter to generate an input baseband signal; An up-conversion circuit causes the input baseband signal to undergo an up-conversion signal processing through two signal processing paths of the same structure and then be superimposed on each other to generate an output radio frequency signal, wherein a mismatch phenomenon equivalent to a mismatch parameter exists between the two signal processing paths; A feedback circuit performs a feedback signal processing on the output RF signal to generate a feedback signal, wherein the feedback signal is a function of the complex baseband signal through the input signal processing, the up-converted signal processing and the feedback signal processing, and the function includes the compensation parameter and the mismatch parameter; A calibration operation circuit enables the input circuit to set the compensation parameter to a plurality of parameter values, and obtains a plurality of feedback values ​​corresponding to the feedback signal from the feedback circuit, so as to solve the mismatch parameter for the function according to the plurality of parameter values ​​and the plurality of feedback values; and The compensation parameter is corrected by the input circuit according to the mismatch parameter.

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