Signal predistortion circuit architecture

Abstract

A signal predistortion circuit architecture includes a digital predistortion circuit, a first transceiver circuit, a first analog front-end circuit, a second transceiver circuit and a second analog front-end circuit, and has better signal path isolation. The digital predistortion circuit outputs a first digital transmission signal according to at least one first predistortion parameter and outputs a second digital transmission signal according to at least one second predistortion parameter, and determines whether to adjust the at least one first predistortion parameter according to a first digital reception signal and determines whether to adjust the at least one second predistortion parameter according to a second digital reception signal. The transmission circuit of the first transceiver circuit, the first analog front-end circuit and the receiving circuit of the second transceiver circuit generate the first digital reception signal according to the first digital transmission signal. The transmission circuit of the second transceiver circuit, the second analog front-end circuit and the receiving circuit of the first transceiver circuit generate the second digital reception signal according to the second digital transmission signal.

Description

Technical Field

[0001] The present invention relates to a circuit architecture, and in particular to a signal predistortion circuit architecture. Background Art

[0002] Generally speaking, a digital predistortion (DPD) circuit is used to eliminate the nonlinearity of an analog circuit (e.g., a power amplifier). Figure 1 A conventional wireless circuit architecture 100 is shown including a digital signal processor (DSP) 110, a DPD circuit 120, a transmission path 130, a front-end modulator (FEM) 140 and a reception path 150, wherein the transmission path 130 includes a digital-to-analog converter (DAC) 132, an upconverter 134 and a power amplifier (PA) 136, and the reception path 150 includes a low noise amplifier (LNA) 152, a downconverter 154 and an analog-to-digital converter (ADC) 156. The FEM 140 transmits / receives signals via an antenna in a communication mode. When determining the digital pre-distortion parameters, the DPD circuit 120 outputs a pre-distortion signal according to a default signal and the digital pre-distortion parameters, and the pre-distortion signal returns to the DPD circuit 120 via the transmission path 130, the transmission end (Tx) and the reception end (Rx) of the FEM 140, and the reception path 150, so that the DPD circuit 120 adjusts the digital pre-distortion parameters according to the difference between the received signal and the default signal, wherein the default signal may be generated by the DPD circuit 120 itself or from the DSP 110. However, in order to save circuit area, the layout distance between the transmission path 130 and the reception path 150 is usually very small, which makes the isolation between the transmission path 130 and the reception path 150 poor, and the signal coupling between the paths is quite significant, which prevents the DPD circuit 120 from correctly determining the digital pre-distortion parameters.

[0003] To solve the above problem, a common approach is to set up an additional receiving path such as Figure 2 Compared to Figure 1 , Figure 2The wireless circuit architecture 200 further includes a coupler 210, a feedback circuit 220 and a switch 230. The feedback circuit 220 is, for example, a circuit similar to / equal to the LNA 152 and the downconverter 154. When determining the digital pre-distortion parameter, the DPD circuit 120 outputs a pre-distortion signal according to a default signal and the digital pre-distortion parameter. The pre-distortion signal is returned to the DPD circuit 120 via the transmission path 130, the transmission end (Tx) of the FEM 140, the coupler 210, the feedback circuit 220, the switch 230 and the ADC 156, so that the DPD circuit 120 adjusts the digital pre-distortion parameter according to the difference between the received signal and the default signal. Since the distance between the feedback path 220 and the transmission path 130 is longer than the distance between the receiving path 150 and the transmission path 130, the isolation effect of this method is better, but it requires additional pins and circuit area, which will increase the cost.

[0004] Another solution is: Figure 1 Under the architecture, the signal to interference ratio (SIR) requirement is reduced, thereby reducing the isolation requirement between the transmission path 130 and the reception path 150. However, the above method requires better noise suppression algorithm performance and circuit design capabilities, which will greatly increase the cost and design difficulty. Summary of the invention

[0005] One of the objectives of the present invention is to provide a signal predistortion circuit architecture to avoid the problems of the prior art.

[0006] The present invention provides a signal predistortion circuit architecture, including a digital predistortion circuit, a first transmission circuit, a first receiving circuit, a second transmission circuit, a second receiving circuit, a first analog front-end circuit and a second analog front-end circuit. The digital predistortion circuit is used to output a first digital transmission signal according to at least one first predistortion parameter and output a second digital transmission signal according to at least one second predistortion parameter, and to determine whether to adjust the at least one first predistortion parameter according to a first digital receiving signal and to determine whether to adjust the at least one second predistortion parameter according to a second digital receiving signal. The first transmission circuit is used to transmit a first analog transmission signal according to the first digital transmission signal. The first receiving circuit is used to transmit the second digital receiving signal to the digital predistortion circuit according to a second analog receiving signal. The second transmission circuit is used to transmit a second analog transmission signal according to the second digital transmission signal. The second receiving circuit is used to transmit the first digital receiving signal to the digital predistortion circuit according to a first analog receiving signal, wherein a minimum layout distance between the first transmission circuit and the first receiving circuit is smaller than a minimum layout distance between the first transmission circuit and the second receiving circuit, and a minimum layout distance between the second transmission circuit and the second receiving circuit is smaller than a minimum layout distance between the second transmission circuit and the first receiving circuit. The first analog front-end circuit is coupled between the first transmission circuit and the second receiving circuit, and is used to generate the first analog receiving signal according to the first analog transmission signal. The second analog front-end circuit is coupled between the second transmission circuit and the first receiving circuit, and is used to generate the second analog receiving signal according to the second analog transmission signal.

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

[0008] In order to make the above and other purposes, features, advantages and embodiments of the present application more clearly understood, the attached drawings are described as follows:

[0009] Figure 1 shows a conventional wireless circuit architecture;

[0010] Figure 2 Shows another conventional wireless circuit architecture;

[0011] Figure 3 An embodiment of the signal predistortion circuit architecture of the present invention is shown;

[0012] Figure 4 show Figure 3 an embodiment of a first transmission circuit, a first receiving circuit, a second transmission circuit and a second receiving circuit; and

[0013] Figure 5show Figure 3 Another embodiment of the first transmission circuit, the first receiving circuit, the second transmission circuit and the second receiving circuit. DETAILED DESCRIPTION

[0014] The present invention discloses a signal predistortion circuit architecture, which can improve the isolation effect between a transmission path and a reception path when performing digital predistortion (DPD) training at a very low cost, so as to improve the efficacy of DPD.

[0015] Figure 3 An embodiment of the signal predistortion circuit architecture of the present invention is shown. Figure 3 The signal predistortion circuit architecture 300 includes a digital signal processor (DSP) 310, a DPD circuit 320, a first transmission circuit 330, a first receiving circuit 340, a second transmission circuit 350, a second receiving circuit 360, a first analog front-end circuit 370 and a second analog front-end circuit 380, wherein the functions of the first transmission circuit 330, the first receiving circuit 340 and the first analog front-end circuit 370 as a whole are similar to / equal to the functions of the second transmission circuit 350, the second receiving circuit 360 and the second analog front-end circuit 380 as a whole.

[0016] As described above, for example, the signal predistortion circuit architecture 300 is applied to a multi-input multi-output (MIMO) The invention relates to a wireless communication device (not shown in the figure); a first transmission circuit 330 includes a first radio frequency transmission circuit (not shown in the figure); a first analog front-end circuit 370 includes a first front-end modulator (front-end modulator; FEM) (not shown in the figure), which is used to transmit a signal from a transmission end (Tx1) to a reception end (Rx1) in a training mode, and transmit / receive a signal via an antenna in a communication mode; a first receiving circuit 340 includes a first radio frequency receiving circuit (not shown in the figure); a second transmission circuit 350 includes a second radio frequency transmission circuit (not shown in the figure); a second analog front-end circuit 380 includes a second front-end modulator (not shown in the figure), which is used to transmit a signal from a transmission end (Tx2) to a reception end (Rx2) in a training mode, and transmit / receive a signal via an antenna in a communication mode; a second receiving circuit 360 includes a second radio frequency receiving circuit (not shown in the figure); and a DSP circuit 310 and a DPD circuit 320 are included in a digital baseband circuit (not shown in the figure). For another example, the signal predistortion circuit architecture 300 is applied to an audio device (not shown in the figure); the first transmission circuit 330 includes a first digital-to-analog converter (DAC) (not shown in the figure); the first analog front-end circuit 370 includes a first amplifier (not shown in the figure) for transmitting a signal from a transmitting end (Tx1) to a receiving end (Rx1) in a training mode, and transmitting a signal to an external device (e.g., a speaker / headphone) or receiving a signal from the external device in a playback mode; the first receiving circuit 340 includes a first analog-to-digital converter (digital-to-analog converter; ADC) (not shown in the figure); the second transmission circuit 350 includes a second DAC (not shown in the figure); the second analog front-end circuit 380 includes a second amplifier (not shown in the figure), which is used to transmit the signal from the transmission end (Tx2) to the receiving end (Rx2) in a training mode, and transmit the signal to an external device (e.g., speaker / headphone) or receive the signal from the external device in a playback mode; the second receiving circuit 360 includes a second ADC (not shown in the figure); and the DSP circuit 310 and the DPD circuit 320 are included in a digital audio circuit. The above-mentioned circuits not shown in the figure are all well-known circuits in the technical field, and their details are omitted here.

[0017] See also Figure 3. The first transmission circuit 330 is arranged next to the first receiving circuit 340, and the isolation between the two circuits may be insufficient; the second transmission circuit 350 is arranged next to the second receiving circuit 360, and the isolation between the two circuits may also be insufficient. In order to prevent insufficient isolation from affecting the effectiveness of DPD, the signal predistortion circuit architecture 300 uses the first transmission circuit 330, the first analog front-end circuit 370 and the second receiving circuit 360 as a signal loop during a first DPD training, and uses the second transmission circuit 350, the second analog front-end circuit 380 and the first receiving circuit 340 as a signal loop during a second DPD training. Since the minimum layout distance between the first transmission circuit 330 and the second receiving circuit 360 is much larger than the minimum layout distance between the first transmission circuit 330 and the first receiving circuit 340, the isolation between the first transmission circuit 330 and the second receiving circuit 360 is relatively good, which can reduce the impact on the effectiveness of DPD. Similarly, since the minimum layout distance between the second transmission circuit 350 and the first receiving circuit 340 is much larger than the minimum layout distance between the second transmission circuit 350 and the first receiving circuit 360, the isolation between the second transmission circuit 350 and the first receiving circuit 340 is relatively good, which can reduce the impact on the effectiveness of DPD.

[0018] See also Figure 3When performing the first DPD training, the DPD circuit 320 processes a first original signal according to at least one first predistortion parameter to output a first digital transmission signal, and the first digital transmission signal is returned to the DPD circuit 320 via the first transmission circuit 330, the transmitting end (Tx1) of the first analog front-end circuit 370, the receiving end (Rx1) of the first analog front-end circuit 370, and the second receiving circuit 360, so that the DPD circuit 320 determines whether to adjust the at least one first predistortion parameter according to the difference between the received signal (i.e., the first digital received signal) and the first original signal, so as to reduce the difference or ensure that the difference is small enough to achieve the effect of DPD, wherein the first original signal can be generated by the DPD circuit 320 itself (the DSP 310 is not necessary in this case), or comes from the DSP 310. When performing a second DPD training, the DPD circuit 320 processes a second original signal according to at least one second predistortion parameter to output a second digital transmission signal. The second digital transmission signal is returned to the DPD circuit 320 via the second transmission circuit 350, the transmitting end (Tx2) and the receiving end (Rx2) of the second analog front-end circuit 380, and the first receiving circuit 340, so that the DPD circuit 320 determines whether to adjust the at least one second predistortion parameter according to the difference between the received signal (i.e., the second digital received signal) and the second original signal, so as to reduce the difference or ensure that the difference is small enough to achieve the effect of DPD, wherein the second original signal can be generated by the DPD circuit 320 itself (the DSP 310 is not necessary in this case), or comes from the DSP 310. The first digital receiving signal reflects a first nonlinear effect caused by the first transmission circuit 330, the first analog front-end circuit 370 and the second receiving circuit 360; the second digital receiving signal reflects a second nonlinear effect caused by the second transmission circuit 350, the second analog front-end circuit 380 and the first receiving circuit 340. The digital pre-distortion circuit 320 reduces / eliminates the first nonlinear effect by adjusting the at least one first pre-distortion parameter, and reduces / eliminates the second nonlinear effect by adjusting the at least one second pre-distortion parameter.

[0019] As described above. The first transmission circuit 330 is used to transmit a first analog transmission signal according to the first digital transmission signal. The first receiving circuit 340 is used to transmit the second digital receiving signal to the DPD circuit 320 according to a second analog receiving signal. The second transmission circuit 350 is used to transmit a second analog transmission signal according to the second digital transmission signal. The second receiving circuit 360 is used to transmit the first digital receiving signal to the DPD circuit 320 according to the first analog receiving signal. The first analog front-end circuit 370 is coupled between the first transmission circuit 330 and the second receiving circuit 360, and is used to generate the first analog receiving signal according to the first analog transmission signal. The second analog front-end circuit 380 is coupled between the second transmission circuit 350 and the first receiving circuit 340, and is used to generate the second analog receiving signal according to the second analog transmission signal.

[0020] In an implementation example, the first transmission circuit 330, the first receiving circuit 340, the second transmission circuit 350 and the second receiving circuit 360 are included in an integrated circuit (eg, Figure 3 The DPD circuit 320 may be included in the integrated circuit or in another integrated circuit. The first analog front-end circuit 370 and the second analog front-end circuit 380 are disposed on a circuit board (eg, a printed circuit board) (eg, Figure 3 The first analog front-end circuit 370 is coupled to the second receiving circuit 360 via a first trace of the circuit board and a first connection interface (e.g., pin or solder ball) (not shown in the figure). The second analog front-end circuit 380 is coupled to the first receiving circuit 340 via a second trace of the circuit board and a second connection interface (e.g., pin or solder ball) (not shown in the figure).

[0021] Figure 4 show Figure 3The first transmission circuit 330, the first receiving circuit 340, the second transmission circuit 350 and the second receiving circuit 360 are provided in an embodiment. The first transmission circuit 330 includes a first DAC 332 and a first transmission circuit 334 (for example, a circuit including an upconverter and a power amplifier, wherein the power amplifier generally has a nonlinear characteristic). The first DAC 332 is used to generate a first conversion signal according to the first digital transmission signal; the first transmission circuit 334 is used to generate the first analog transmission signal according to the first conversion signal. The first receiving circuit 340 includes a first receiving circuit 342 (for example, a circuit including a low noise amplifier and a downconverter) and a first ADC 344. The first receiving circuit 342 is used to generate a second to-be-converted signal according to the second analog reception signal; the first ADC 344 is used to generate the second digital reception signal according to the second to-be-converted signal. Similarly, the second transmission circuit 350 includes a second DAC 352 and a second transmission circuit 354 (for example, a circuit including an upconverter and a power amplifier, wherein the power amplifier generally has a nonlinear characteristic). The second DAC 352 is used to generate a second conversion signal according to the second digital transmission signal; the second transmission circuit 354 is used to generate the second analog transmission signal according to the second conversion signal. The second receiving circuit 360 includes a second receiving circuit 362 (for example, a circuit including a low noise amplifier and a downconverter) and a second ADC 364. The second receiving circuit 362 is used to generate a first to-be-converted signal according to the first analog reception signal; the second ADC 364 is used to generate the first digital reception signal according to the first to-be-converted signal.

[0022] See also Figure 4In an implementation example, the signal predistortion circuit architecture 300 is applied to a wireless communication device, and further includes a first switching circuit 410 and a second switching circuit 420. The first switching circuit 410 is used to couple the first analog front-end circuit 370 and the second receiving circuit 360 in a training mode, and to couple the first analog front-end circuit 370 and the first receiving circuit 340 in a communication mode. The second switching circuit 420 is used to couple the second analog front-end circuit 380 and the first receiving circuit 340 in the training mode, and to couple the second analog front-end circuit 380 and the second receiving circuit 360 in the communication mode. The DSP 310 is used to receive and process a first communication signal via the first analog front-end circuit 370, the first switching circuit 410 and the first receiving circuit 340 in the communication mode, and to receive and process a second communication signal via the second analog front-end circuit 380, the second switching circuit 420 and the second receiving circuit 360 in the communication mode, wherein the first communication signal originates from a first wireless communication object (not shown in the figure), and the second communication signal originates from the first wireless communication object or a second wireless communication object (not shown in the figure), and the first wireless communication object / the second wireless communication object communicates wirelessly with the wireless communication device. In short, the signal receiving path in the training mode is different from the signal receiving path in the communication mode.

[0023] See also Figure 4 The first digital receiving signal reflects a first nonlinear effect caused by the first transmission circuit 330, the first analog front-end circuit 370 and the second receiving circuit 360; the second digital receiving signal reflects a second nonlinear effect caused by the second transmission circuit 350, the second analog front-end circuit 380 and the first receiving circuit 340. The contribution of the second receiving circuit 360 to the first nonlinear effect is similar to the contribution of the first receiving circuit 340 to the second nonlinear effect (for example, the difference between the two contributions is at least less than -10 dB), so as to ensure that the parameters obtained in the training mode can be applied to the communication mode; or the contribution of the second receiving circuit 360 to the first nonlinear effect is much smaller than the contribution of the first transmission circuit 330 and the first analog front-end circuit 370 to the first nonlinear effect (for example, the difference between the two contributions is at least greater than 10 dB), and the contribution of the first receiving circuit 340 to the second nonlinear effect is much smaller than the contribution of the second transmission circuit 350 and the second analog front-end circuit 380 to the second nonlinear effect (for example, the difference between the two contributions is at least greater than 10 dB).

[0024] See also Figure 3 as well as Figure 3-4 In one implementation example, the signal receiving path in the training mode is the same as the signal receiving path in the communication mode; in this case, Figure 4The first switching circuit 410 and the second switching circuit 420 are not necessary, and the DSP 310 is used to receive and process the first communication signal via the first analog front-end circuit 370 and the second receiving circuit 360 in the communication mode, and to receive and process the second communication signal via the second analog front-end circuit 380 and the first receiving circuit 340 in the communication mode. Since a person skilled in the art having common knowledge can understand the details of the implementation example from the aforementioned embodiments and implementation examples, repeated and redundant descriptions are omitted here.

[0025] It is worth noting that, in the communication mode, the DPD circuit 320 may not adjust the at least one first pre-distortion parameter, and may not adjust the at least one second pre-distortion parameter; or, in the communication mode, the DPD circuit 320 determines whether to adjust the at least one first pre-distortion parameter according to the first wireless communication signal, and determines whether to adjust the at least one second pre-distortion parameter according to the second wireless communication signal.

[0026] Figure 5 Another embodiment of the first transmission circuit 330, the first receiving circuit 340, the second transmission circuit 350 and the second receiving circuit 360 is shown. The first transmission circuit 330 includes a first DAC 502, which is used to generate the first analog transmission signal according to the first digital transmission signal. The first receiving circuit 340 includes a first ADC 504, which is used to generate the second digital reception signal according to the second analog reception signal. The second transmission circuit 350 includes a second DAC 506, which is used to generate the second analog transmission signal according to the second digital transmission signal. The second receiving circuit 360 includes a second ADC 508, which is used to generate the first digital reception signal according to the first analog reception signal.

[0027] See also Figure 5In an implementation example, the signal predistortion circuit architecture 300 is applied to an audio device, and further includes a first switching circuit 510 and a second switching circuit 520. The first switching circuit 510 is used to couple the first analog front-end circuit 370 and the second receiving circuit 360 in a training mode, and to couple the first analog front-end circuit 370 and the first receiving circuit 340 in a play mode. The second switching circuit 520 is used to couple the second analog front-end circuit 380 and the first receiving circuit 340 in the training mode, and to couple the second analog front-end circuit 380 and the second receiving circuit 360 in the play mode. The DSP 310 is used to receive and process a first audio signal (e.g., a first audio control signal from a speaker / earphone) via the first analog front-end circuit 370, the first switching circuit 510, and the first receiving circuit 340 in the play mode, and to receive and process a second audio signal (e.g., a second audio control signal from a speaker / earphone) via the second analog front-end circuit 380, the second switching circuit 520, and the second receiving circuit 360 in the play mode. In short, the signal receiving path in the training mode is different from the signal receiving path in the playback mode. It is worth noting that the aforementioned description of the contribution of the first nonlinear effect and the second nonlinear effect also applies to the present implementation example. It is also worth noting that in the playback mode, the DPD circuit 320 may not adjust the at least one first predistortion parameter, and may not adjust the at least one second predistortion parameter; or in the playback mode, the DPD circuit 320 determines whether to adjust the at least one first predistortion parameter based on the first audio signal, and determines whether to adjust the at least one second predistortion parameter based on the second audio signal.

[0028] See also Figure 3 as well as Figure 3 and Figure 5 In one implementation example, the signal receiving path in the training mode is the same as the signal receiving path in the communication mode; in this case, Figure 5 The first switching circuit 510 and the second switching circuit 520 are not necessary, and the DSP 310 is used to receive and process the first audio signal via the first analog front-end circuit 370 and the second receiving circuit 360 in the play mode, and to receive and process the second audio signal via the second analog front-end circuit 380 and the first receiving circuit 340 in the play mode. Since a person skilled in the art with common knowledge can understand the details of the implementation example from the aforementioned embodiments and implementation examples, repeated and redundant descriptions are omitted here.

[0029] Please note that, under the premise that implementation is possible, technicians with common knowledge in this technical field may selectively implement some or all of the technical features in any of the aforementioned embodiments, or selectively implement a combination of some or all of the technical features in the aforementioned multiple embodiments, so as to increase the flexibility of the implementation of the present invention.

[0030] In summary, the present invention can improve the isolation effect between the transmission path and the reception path when performing DPD training in a very low-cost manner, so as to improve the efficacy of DPD.

[0031] Although the embodiments of the present invention are described above, these embodiments are not intended to limit the present invention. A technician with common knowledge in the technical field may make changes to the technical features of the present invention based on the explicit or implicit contents of the present invention. All these changes fall within the scope of patent protection sought by the present invention. In other words, the scope of patent protection of the present invention shall be defined in accordance with the claims of this specification.

[0032] Description of reference numerals:

[0033] 100: Wireless Circuit Architecture

[0034] 110: DSP (Digital Signal Processor)

[0035] 120: DPD circuit (digital pre-distortion circuit)

[0036] 130: Transmission path

[0037] 132: DAC (digital to analog converter)

[0038] 134: Upconverter

[0039] 136: PA (power amplifier)

[0040] 140: FEM (Front End Modulator)

[0041] Tx: Transmitter

[0042] Rx: Receiver

[0043] 150: Receiving path

[0044] 152: LNA (Low Noise Amplifier)

[0045] 154: Downconverter

[0046] 156: ADC (Analog to Digital Converter)

[0047] 200: Wireless Circuit Architecture

[0048] 210: Coupler

[0049] 220: Feedback Circuit

[0050] 230: Switcher

[0051] 300: Signal Predistortion Circuit Architecture

[0052] 310: DSP (Digital Signal Processor)

[0053] 320: DPD circuit (digital pre-distortion circuit)

[0054] 330: First transmission circuit

[0055] 340: First receiving circuit

[0056] 350: Second transmission circuit

[0057] 360: Second receiving circuit

[0058] 370: First analog front-end circuit

[0059] 380: Second analog front-end circuit

[0060] Tx1: Transmitter of the first analog front-end circuit

[0061] Rx1: The receiving end of the first analog front-end circuit

[0062] Tx2: Transmitter of the second analog front-end circuit

[0063] Rx2: The receiving end of the second analog front-end circuit

[0064] IC: Integrated Circuit

[0065] PCB: Printed Circuit Board

[0066] 332: First DAC (first digital to analog converter)

[0067] 334: First transmission circuit

[0068] 342: First receiving circuit

[0069] 344: first ADC (first analog to digital converter)

[0070] 352: Second DAC

[0071] 354: Second transmission circuit

[0072] 362: Second receiving circuit

[0073] 364: Second ADC

[0074] 410: First switching circuit

[0075] 420: Second switching circuit

[0076] 502: First DAC

[0077] 504: First ADC

[0078] 506: Second DAC

[0079] 508: Second ADC

[0080] 510: First switching circuit

[0081] 520: Second switching circuit

Claims

1. A signal predistortion circuit architecture, comprising: a digital predistortion circuit, configured to output a first digital transmission signal according to at least one first predistortion parameter and output a second digital transmission signal according to at least one second predistortion parameter, and to determine whether to adjust the at least one first predistortion parameter according to a first digital reception signal and to determine whether to adjust the at least one second predistortion parameter according to a second digital reception signal; a first transmission circuit, configured to transmit a first analog transmission signal according to the first digital transmission signal; a first receiving circuit, used for transmitting the second digital receiving signal to the digital predistortion circuit according to a second analog receiving signal; a second transmission circuit, configured to transmit a second analog transmission signal according to the second digital transmission signal; a second receiving circuit, configured to transmit the first digital receiving signal to the digital predistortion circuit according to a first analog receiving signal, wherein a minimum layout distance between the first transmitting circuit and the first receiving circuit is smaller than a minimum layout distance between the first transmitting circuit and the second receiving circuit, and a minimum layout distance between the second transmitting circuit and the second receiving circuit is smaller than a minimum layout distance between the second transmitting circuit and the first receiving circuit; a first analog front-end circuit, coupled between the first transmission circuit and the second reception circuit, for generating the first analog reception signal according to the first analog transmission signal; as well as A second analog front-end circuit is coupled between the second transmission circuit and the first reception circuit, and is used for generating the second analog reception signal according to the second analog transmission signal.

2. The signal predistortion circuit architecture according to claim 1, characterized in that: The first transmission circuit, the first receiving circuit, the second transmission circuit and the second receiving circuit are included in an integrated circuit; the first analog front-end circuit and the second analog front-end circuit are arranged on a circuit board and are located outside the integrated circuit; and the first analog front-end circuit is coupled to the second receiving circuit via a first routing of the circuit board, and the second analog front-end circuit is coupled to the first receiving circuit via a second routing of the circuit board.

3. The signal predistortion circuit architecture according to claim 1, characterized in that: The first transmission circuit comprises: a first digital-to-analog converter, configured to generate a first conversion signal according to the first digital transmission signal; and a first transmission circuit, configured to generate the first analog transmission signal according to the first conversion signal; The first receiving circuit comprises: a first receiving circuit, configured to generate a second signal to be converted according to the second analog receiving signal; and a first analog-to-digital converter, configured to generate the second digital receiving signal according to the second signal to be converted; The second transmission circuit comprises: a second digital-to-analog converter, configured to generate a second conversion signal according to the second digital transmission signal; and a second transmission circuit, configured to generate the second analog transmission signal according to the second conversion signal; The second receiving circuit comprises: a second receiving circuit, configured to generate a first signal to be converted according to the first analog receiving signal; and A second analog-to-digital converter is used for generating the first digital receiving signal according to the first signal to be converted.

4. The signal predistortion circuit architecture according to claim 3, characterized in that: The signal predistortion circuit architecture is included in a wireless communication device; the first transmission circuit includes a first RF transmission circuit, the first analog front-end circuit is included in a first front-end modulator, and the first receiving circuit includes a first RF receiving circuit; the second transmission circuit includes a second RF transmission circuit, the second analog front-end circuit is included in a second front-end modulator, and the second receiving circuit includes a second RF receiving circuit; and the digital predistortion circuit is included in a baseband circuit.

5. The signal predistortion circuit architecture according to claim 4, characterized in that: Further including: a first switching circuit, used to couple the first analog front-end circuit and the second receiving circuit in a training mode, and to couple the first analog front-end circuit and the first receiving circuit in a communication mode; a second switching circuit, configured to couple the second analog front-end circuit and the first receiving circuit in the training mode, and to couple the second analog front-end circuit and the second receiving circuit in the communication mode; as well as A digital signal processor is coupled to the first receiving circuit and the second receiving circuit, and is used to receive and process a first communication signal via the first analog front-end circuit, the first switching circuit and the first receiving circuit in the communication mode, and to receive and process a second communication signal via the second analog front-end circuit, the second switching circuit and the second receiving circuit in the communication mode, wherein the first communication signal originates from a first wireless communication object, and the second communication signal originates from the first wireless communication object or a second wireless communication object.

6. The signal predistortion circuit architecture according to claim 4, characterized in that: Further including: a first circuit for coupling the first analog front-end circuit and the second receiving circuit in a training mode, and coupling the first analog front-end circuit and the second receiving circuit in a communication mode; a second circuit for coupling the second analog front-end circuit and the first receiving circuit in the training mode, and coupling the second analog front-end circuit and the first receiving circuit in the communication mode; as well as A digital signal processor is coupled to the first receiving circuit and the second receiving circuit, and is used to receive and process a first communication signal via the first analog front-end circuit and the second receiving circuit in the communication mode, and to receive and process a second communication signal via the second analog front-end circuit and the first receiving circuit in the communication mode, wherein the first communication signal originates from a first wireless communication object, and the second communication signal originates from the first wireless communication object or a second wireless communication object.

7. The signal predistortion circuit architecture according to claim 1, characterized in that: The first transmission circuit comprises: a first digital-to-analog converter, configured to generate the first analog transmission signal according to the first digital transmission signal; The first receiving circuit comprises: a first analog-to-digital converter, configured to generate the second digital receiving signal according to the second analog receiving signal; The second transmission circuit comprises: a second digital-to-analog converter, configured to generate the second analog transmission signal according to the second digital transmission signal; and The second receiving circuit comprises: A second analog-to-digital converter is used for generating the first digital receiving signal according to the first analog receiving signal.

8. The signal predistortion circuit architecture according to claim 7, characterized in that: The signal predistortion circuit architecture is included in an audio device; the first analog front-end circuit includes a first amplifier; and the second analog front-end circuit includes a second amplifier.

9. The signal predistortion circuit architecture according to claim 8, characterized in that: Further including: a first switching circuit, used to couple the first analog front-end circuit and the second receiving circuit in a training mode, and to couple the first analog front-end circuit and the first receiving circuit in a playback mode; a second switching circuit, configured to couple the second analog front-end circuit and the first receiving circuit in the training mode, and to couple the second analog front-end circuit and the second receiving circuit in the playing mode; as well as A digital signal processor is coupled to the first receiving circuit and the second receiving circuit, and is used to receive and process a first audio signal via the first analog front-end circuit, the first switching circuit, and the first receiving circuit in the playback mode, and to receive and process a second audio signal via the second analog front-end circuit, the second switching circuit, and the second receiving circuit in the playback mode.

10. The signal predistortion circuit architecture according to claim 8, characterized in that: Further including: a first circuit for coupling the first analog front-end circuit and the second receiving circuit in a training mode, and coupling the first analog front-end circuit and the second receiving circuit in a play mode; a second circuit for coupling the second analog front-end circuit and the first receiving circuit in the training mode, and coupling the second analog front-end circuit and the first receiving circuit in the playing mode; as well as A digital signal processor is coupled to the first receiving circuit and the second receiving circuit, and is used to receive and process a first communication signal via the first analog front-end circuit and the second receiving circuit in the playback mode, and to receive and process a second communication signal via the second analog front-end circuit and the first receiving circuit in the playback mode, wherein the first communication signal originates from a first wireless communication object, and the second communication signal originates from the first wireless communication object or a second wireless communication object.

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