WO2022165842A1

WO2022165842A1 - Signal transmission method, electronic device, and storage medium

Info

Publication number: WO2022165842A1
Application number: PCT/CN2021/076036
Authority: WO
Inventors: 魏建勇
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2022-08-11

Abstract

The embodiments of the present application relate to the technical field of communications. Provided are a signal transmission method, an electronic device, and a storage medium. The method comprises: adjusting an impedance of a second transceiving link at multiple different moments; when the second transceiving link has multiple different impedances, receiving multiple first carrier signals sent by a first electronic device; on the basis of the multiple first carrier signals received by a second electronic device and the multiple impedances, determining a mapping relationship between phase deviations and impedances; determining the current phase deviation on the basis of the current impedance of the second transceiving link and the mapping relationship; and performing phase compensation on a second modulated signal on the basis of the current phase deviation, and sending to the first electronic device the second modulated signal obtained after the phase compensation. According to the method provided by the embodiments of the present application, the phase of a sent signal is compensated for at an NFC terminal, so that a phase deviation between a card reader signal and an NFC terminal signal can be eliminated, thereby improving the signal demodulation efficiency of a card reader.

Description

Signal transmission method, electronic device and storage medium

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a signal transmission method, an electronic device, and a storage medium.

Background technique

With the rapid development of short-range communication technologies, such as Near Field Communication (NFC) and Radio Frequency Identification (Radio Frequency Identification), there are more and more types of reading and writing devices. Taking NFC as an example, it includes various related electronic devices such as Proximity Coupling Device (PCD, commonly known as reader) and corresponding Proximity Integrated Circuit Card (PICC).

When the PCD communicates with the PICC, there will be a phase deviation between the transmitted signal of the PCD and the received signal of the PICC, and the phase deviation of the signal at different frequencies is also different, which will adversely affect the communication between the PCD and the PICC. , and even cause the communication between PCD and PICC to fail. Therefore, a method to eliminate the phase deviation between PCD and PICC is urgently needed.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a signal transmission method, an electronic device, and a storage medium, so as to provide a signal transmission method.

In a first aspect, an embodiment of the present application provides a signal transmission method, which is applied to a second electronic device, where the second electronic device includes a second transceiver link for transmitting and receiving signals, and the impedance of the second transceiver link is adjustable ,include:

The impedance of the second transceiving link is adjusted respectively at multiple different times, so that the second transceiving link correspondingly has multiple different impedances at multiple different times.

When the second transceiver link has multiple different impedances, the multiple first carrier signals sent by the first electronic device are respectively received, and the multiple first carrier signals received by the second electronic device are obtained.

Based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, the mapping relationship between the phase deviation and the impedance is determined; wherein the phase deviation is used to characterize the first carrier signal sent by the first electronic device and the second Phase difference between the first carrier signals received by the electronic device.

The current impedance of the second transceiver link is acquired, and the current phase deviation is determined based on the current impedance and the mapping relationship.

Obtain the second carrier signal and the second modulation signal, modulate the second modulation signal on the second carrier signal, and obtain the second modulated signal; perform phase compensation on the second modulated signal based on the current phase deviation, and perform phase compensation on the second modulated signal. The obtained second modulated signal is sent to the first electronic device.

In the embodiment of the present application, by calculating the phase deviation between the carrier signal sent by the PCD side and the carrier signal received by the PICC side, phase compensation is performed on the carrier signal to be sent by the PICC side based on the phase deviation, so that the PICC side can be eliminated. The phase deviation caused by the transmitted carrier signal on the PCD side can further improve the communication quality.

In one possible implementation manner, respectively adjusting the impedance of the second transceiver link at multiple different times includes:

Periodically adjust the impedance of the second transceiving link within a preset time period.

In the embodiment of the present application, by periodically adjusting the impedance, the convenience of impedance adjustment can be improved.

In order to improve the efficiency of adjusting the impedance, in one possible implementation manner, the second transceiving link includes an initial impedance, and periodically adjusting the impedance of the second transceiving link within a preset time period includes:

The impedance of the second transceiving link is adjusted respectively in two cycles within the preset time period, wherein the three impedances include the initial impedance and the two adjusted impedances.

In order to improve the flexibility of adjusting the impedance, in one possible implementation manner, periodically adjusting the impedance of the second transceiver link within a preset time period includes:

The impedances of the second transceiver link are respectively adjusted in three cycles within the preset time period, wherein the three impedances include three adjusted impedances.

One of the possible implementations also includes:

Respectively receive multiple first modulated signals sent by the first electronic device at different times to obtain multiple first modulated signals received by the second electronic device, wherein the multiple first modulated signals sent by the first electronic device It includes the first carrier signal and the first modulation signal sent by the first electronic device, and the first modulated signal received by the second electronic device includes the first carrier signal and the first modulation signal received by the second electronic device;

Obtain the 0-phase moment of the first carrier signal received by the second electronic device and the frame start point moment of the first modulated signal received by the second electronic device, based on the 0-phase moment of the first carrier signal received by the second electronic device and the frame start point moment of the first modulated signal received by the second electronic device to determine the phase difference, wherein the phase difference is used to characterize the first carrier signal received by the second electronic device and the first carrier signal received by the second electronic device. Phase difference value between modulated signals.

In the embodiment of the present application, by receiving the modulated signal sent by the PCD terminal, the phase difference between the modulated signal and the carrier signal can be effectively obtained.

In order to effectively obtain the 0-phase moment of the first carrier signal, in one possible implementation manner, the second electronic device includes a clock module, and the 0-phase moment of the first carrier signal received by the second electronic device is sampled by the clock module. get.

In order to improve the sampling efficiency, in one possible implementation manner, the sampling performed by the clock module includes:

Multiply the sampling frequency of the clock module by n, where n is a constant, and n is determined by the precision of the phase deviation;

Based on the clock module obtained by multiplying the sampling frequency by n, the first carrier signal received by the second electronic device is sampled to obtain the 0-phase moment of the first carrier signal received by the second electronic device.

In one possible implementation manner, before performing phase compensation on the second modulated signal based on the phase deviation, the method further includes:

Phase compensation is performed on the second modulated signal based on the phase difference.

In the embodiment of the present application, by performing phase compensation on the second modulated signal sent by the PICC side, the influence caused by the phase deviation of the second modulated signal received on the PCD side can be effectively reduced, thereby further improving communication quality.

In one possible implementation manner, performing phase compensation on the second modulated signal based on the phase deviation includes:

Advance the phase of the second modulated signal by twice the phase offset.

In the embodiment of the present application, due to the symmetry of the link, the phase deviations between the PCD and the PICC and between the PICC and the PCD are the same. Therefore, compensating twice the phase deviation for the second modulated signal can effectively reduce the The influence of the phase deviation on the modulated signal, which in turn can improve the communication quality.

In order to simplify the form of the mapping relationship, in one possible implementation manner, the first electronic device includes a first transceiving link for transceiving signals, and the first transceiving link and the second transceiving link form an equivalent chain for signal transmission Road, based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, determining the mapping relationship between the phase deviation and the impedance specifically includes:

The coefficients of the equivalent link are determined based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, and the mapping relationship is represented by a formula including the coefficients.

In order to improve communication efficiency, in one possible implementation manner, the frequency of the first carrier signal and the second carrier signal are the same.

In a second aspect, an embodiment of the present application provides a signal transmission apparatus, which is applied to a second electronic device. The second electronic device includes a second transceiver link for transmitting and receiving signals, and the impedance of the second transceiver link is adjustable, including:

an adjustment module, configured to adjust the impedance of the second transceiver link at multiple different times, so that the second transceiver link has different multiple impedances at multiple different times;

a receiving module, configured to respectively receive a plurality of first carrier signals sent by the first electronic device when the second transceiver link has a plurality of different impedances, and obtain a plurality of first carrier signals received by the second electronic device;

The first determination module is configured to determine the mapping relationship between the phase deviation and the impedance based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device; wherein the phase deviation is used to characterize the signal sent by the first electronic device. a phase difference value between the first carrier signal and the first carrier signal received by the second electronic device;

a calculation module, configured to obtain the current impedance of the second transceiver link, and determine the current phase deviation based on the current impedance and the mapping relationship;

The first compensation module is used to obtain the second carrier signal and the second modulation signal, modulate the second modulation signal on the second carrier signal, and obtain the second modulated signal; based on the current phase deviation, the second modulated signal is phased compensate,

The sending module is used for sending the second modulated signal obtained after the phase compensation to the first electronic device.

In one possible implementation manner, the above adjustment module is further configured to periodically adjust the impedance of the second transceiving link within a preset time period.

In one possible implementation manner, the second transceiver link includes an initial impedance, and the adjustment module is further configured to adjust the impedance of the second transceiver link in two cycles within a preset time period, wherein the three impedances include Initial impedance and two adjusted impedances.

In one possible implementation manner, the adjustment module is further configured to adjust the impedance of the second transceiver link in three cycles within a preset time period, wherein the three impedances include three adjustment impedances.

In one possible implementation manner, the above-mentioned device further includes:

The second determining module is configured to respectively receive multiple first modulated signals sent by the first electronic device at different times, and obtain multiple first modulated signals received by the second electronic device, wherein the first modulated signals sent by the first electronic device are The plurality of first modulated signals include the first carrier signal and the first modulated signal sent by the first electronic device, and the first modulated signal received by the second electronic device includes the first carrier signal and the first modulated signal received by the second electronic device. A modulated signal; obtain the 0-phase moment of the first carrier signal received by the second electronic device and the frame start point moment of the first modulated signal received by the second electronic device, based on the first carrier signal received by the second electronic device The 0 phase moment of the second electronic device and the frame start point moment of the first modulated signal received by the second electronic device determine the phase difference, wherein the phase difference is used to characterize the first carrier signal received by the second electronic device and the second electronic device. The phase difference between the received first modulated signals.

The clock module is configured to sample the first carrier signal received by the second electronic device to obtain the 0-phase moment of the first carrier signal received by the second electronic device.

In one of the possible implementations, the above clock module is also used to perform n-multiplier on the sampling frequency, where n is a constant, and n is determined by the precision of the phase deviation; sampling to obtain the 0-phase moment of the first carrier signal received by the second electronic device.

The second compensation module is configured to perform phase compensation on the second modulated signal based on the phase difference.

In one possible implementation manner, the above-mentioned first compensation module is further configured to advance the phase of the second modulated signal by twice the phase deviation.

In one possible implementation manner, the first electronic device includes a first transceiving link for transceiving signals, the first transceiving link and the second transceiving link form an equivalent link for signal transmission, and the first determining module above It is also used to determine the coefficients of the equivalent link based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, and the mapping relationship is represented by a formula including the coefficients.

In one possible implementation manner, the frequency of the first carrier signal and the second carrier signal are the same.

In a third aspect, an embodiment of the present application provides a second electronic device, where the second electronic device includes a second transceiver link for transmitting and receiving signals, and the impedance of the second transceiver link is adjustable, including:

Memory, the memory is used to store computer program code, and the computer program code includes instructions, when the second electronic device reads the instructions from the memory, so that the second electronic device performs the following steps:

Adjust the impedance of the second transceiver link respectively at multiple different times, so that the second transceiver link has different multiple impedances correspondingly at multiple different times;

Respectively receive multiple first carrier signals sent by the first electronic device when the second transceiver link has multiple different impedances, to obtain multiple first carrier signals received by the second electronic device;

Based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, the mapping relationship between the phase deviation and the impedance is determined; wherein the phase deviation is used to characterize the first carrier signal sent by the first electronic device and the second the phase difference value between the first carrier signals received by the electronic device;

obtaining the current impedance of the second transceiver link, and determining the current phase deviation based on the current impedance and the mapping relationship;

acquiring a second carrier signal and a second modulated signal, and modulating the second modulated signal on the second carrier signal to obtain a second modulated signal;

Phase compensation is performed on the second modulated signal based on the current phase deviation, and the second modulated signal obtained after the phase compensation is sent to the first electronic device.

In one possible implementation manner, when the above-mentioned instruction is executed by the above-mentioned second electronic device, the step of causing the above-mentioned second electronic device to perform the step of adjusting the impedance of the second transceiving link respectively at multiple different times includes:

In one possible implementation manner, the second transceiving link includes an initial impedance, and when the instruction is executed by the second electronic device, the second electronic device executes and periodically adjusts the second transceiving chain within a preset period of time. The steps of circuit impedance include:

In one possible implementation manner, when the above-mentioned instruction is executed by the above-mentioned second electronic device, causing the above-mentioned second electronic device to perform the step of periodically adjusting the impedance of the second transceiving link within a preset time period includes:

In one possible implementation manner, when the above-mentioned instruction is executed by the above-mentioned second electronic device, the above-mentioned second electronic device further executes the following steps:

In one possible implementation manner, the second electronic device includes a clock module, and the 0-phase moment of the first carrier signal received by the second electronic device is obtained after sampling by the clock module.

In one possible implementation manner, when the above-mentioned instruction is executed by the above-mentioned second electronic device, the step of causing the above-mentioned second electronic device to execute the clock module to perform sampling includes:

In one possible implementation manner, when the above-mentioned instruction is executed by the above-mentioned second electronic device, before the above-mentioned second electronic device performs the step of performing phase compensation on the second modulated signal based on the phase deviation, the following steps are also performed:

In one possible implementation manner, when the above-mentioned instruction is executed by the above-mentioned second electronic device, the step of causing the above-mentioned second electronic device to perform phase compensation on the second modulated signal based on the phase deviation includes:

Advance the phase of the second modulated signal by twice the phase offset.

In one possible implementation manner, the first electronic device includes a first transceiving link for transceiving signals, the first transceiving link and the second transceiving link form an equivalent link for signal transmission, and the above-mentioned instruction is executed by the above-mentioned first transceiving link. When the second electronic device is executed, the step of determining the mapping relationship between the phase deviation and the impedance based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device includes:

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when it runs on a computer, causes the computer to execute the method described in the first aspect.

In a fifth aspect, an embodiment of the present application provides a computer program, which is used to execute the method described in the first aspect when the computer program is executed by a computer.

In a possible design, the program in the fifth aspect may be stored in whole or in part on a storage medium packaged with the processor, and may also be stored in part or in part in a memory not packaged with the processor.

Description of drawings

FIG. 1 is a schematic diagram of signal transceiving provided by an embodiment of the present application;

FIG. 2 is a waveform diagram of a transmission signal provided by an embodiment of the present application;

3 is a schematic diagram of a phase deviation between a received signal and a transmitted signal according to an embodiment of the present application;

FIG. 4 is a schematic diagram of an application scenario provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of a signal transmission method provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of an equivalent link provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a phase difference provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of frequency multiplication of a clock sampling frequency provided by an embodiment of the present application;

9 is a schematic diagram of calculating a phase difference between a modulated signal and a carrier signal according to an embodiment of the present application;

FIG. 10 is a schematic diagram of phase compensation of a modulated signal provided by an embodiment of the present application;

11 is a schematic diagram of a carrier signal phase compensation provided by an embodiment of the present application;

12 is a schematic structural diagram of a signal transmission apparatus provided by an embodiment of the present application;

FIG. 13 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Wherein, in the description of the embodiments of the present application, unless otherwise stated, “/” means or means, for example, A/B can mean A or B; “and/or” in this document is only a description of the associated object The association relationship of , indicates that there can be three kinds of relationships, for example, A and/or B, can indicate that A exists alone, A and B exist at the same time, and B exists alone.

Hereinafter, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

At present, there are more and more devices for short-range communication. Taking NFC as an example, the above-mentioned devices may include electronic devices such as PCD and PICC. Among them, the PCD and the PICC communicate through modulated signals. Since the modulated signal is usually a low-frequency signal, which is not conducive to transmission, the modulated signal is usually modulated on a high-frequency carrier signal for transmission. Exemplarily, the PCD can modulate the modulated signal on the carrier signal and send it to the PICC, and the PICC can also modulate the modulated signal on the carrier signal and send the modulated signal to the PICC, thereby implementing communication between the PCD and the PICC.

However, when the PCD communicates with the PICC, due to the reasons of the wireless link, such as link detuning, there may be a phase deviation between the transmitted signal of the PCD and the received signal of the PICC. A phase deviation may also occur between the received signals of the PCD. The above wireless link may include a transceiver circuit on the PCD side, such as an EMC and matching circuit on the PCD side, and a transceiver circuit on the PICC side, such as an EMC and matching circuit on the PICC side. Since the PICC side will use a carrier with the same frequency and phase as the carrier received by the PICC, that is to say, the carrier signal sent by the PICC side has the same frequency and phase as the carrier signal received by the PICC side and sent by the PCD, and can The modulated signal on the PICC side is modulated on the carrier wave sent by the PICC side, so that the PCD side can perform demodulation according to the carrier signal sent by the PICC side, so as to realize smooth communication between the PCD and the PICC. Therefore, when the carrier signal between the PCD and the PICC has a phase deviation, and when the PCD receives the carrier signal sent by the PICC, since the phase deviation will affect the amplitude of the received signal (for example, weaken or reverse), the This adversely affects the demodulation of the PCD, which in turn may result in a loss of communication between the PCD and the PICC.

FIG. 1 is a schematic diagram of the communication between the PCD and the PICC. Referring to FIG. 1 , the PCD side includes a transmitter 11 , a receiver 12 , a transceiver circuit 13 and an antenna 14 . The transmitter 11 can be used to generate a carrier signal on the PCD side (for the convenience of description, the carrier signal sent by the PCD side is hereinafter referred to as a "first carrier signal") and a modulated signal sent by the PCD side (for the convenience of description, the following will be The modulated signal sent by the PCD side is called the "first modulated signal", and the first modulated signal can be modulated on the first carrier signal, so that the modulated signal sent by the PCD side can be obtained (for the convenience of description, the PCD side The transmitted modulated signal is called "first modulated signal"); it is understood that the above-mentioned first modulated signal may be a modulated carrier signal, and the first modulated signal and the first carrier signal have the same frequency and phase The receiver 12 can be used to demodulate the modulated signal sent by the PICC side (for the convenience of description, the modulated signal sent by the PICC side is hereinafter referred to as the "second modulated signal"), so that the signal sent by the PICC side can be obtained. (For the convenience of description, the modulated signal sent by the PICC side is referred to as the "second modulation signal"); the transceiver circuit 13 can be used for the first modulated signal sent by the PCD side and the second modulated signal received by the PCD side. The modulated signal is processed, for example, electromagnetic compatibility, etc.; the antenna 14 is used for receiving the second modulated signal sent by the PICC and sending the first modulated signal on the PCD side.

The PICC side includes a transmitter 21 , a receiver 22 , a transceiver circuit 23 , an antenna 24 and a clock 25 . The receiver 22 can be used to separate the first modulated signal received by the PICC side, thereby obtaining the first modulated signal received by the PICC side. It can be understood that the above separation process can be performed by the receiver 22 The first carrier signal in the first modulated signal received by the PICC side is removed, and the first modulated signal received by the PICC side is retained; the transmitter 21 can be used to modulate the second modulated signal sent by the PICC side on the PICC side. On the second carrier signal sent, the second carrier signal sent by the PICC side has the same frequency as the first carrier signal received by the PICC side, so that the second modulated signal sent by the PICC side can be obtained; it is understandable Yes, the second modulated signal may be a modulated carrier signal, and the second modulated signal and the second carrier signal sent by the PICC side have the same frequency and phase. The transceiver circuit 23 can be used to process the second modulated signal sent by the PICC side and the first modulated signal received by the PICC side, for example, electromagnetic compatibility, etc.; the antenna 24 is used to receive the first modulated signal sent by the PCD and A second modulated signal is sent; clock 25 is used to generate the local clock.

Wherein, after the transmitter 11 of the PCD generates the first carrier signal (for example, it may be a carrier signal of 0 phase), it sends it to the PICC, and after processing by the transceiver link, the receiver 22 of the PICC receives the above-mentioned first carrier signal and transmits it to the PICC. demodulate. The above-mentioned transceiver link may include a transceiver circuit 13 , an antenna 14 , a transceiver circuit 23 and an antenna 24 . Due to the above-mentioned transceiver chain, the first carrier signal received by the receiver 22 and the first carrier signal generated by the transmitter 11 may have a phase deviation (for example, the phase deviation is θ), that is, the receiver 22 of the PICC The phase of the received first carrier signal is 0+θ=θ. At this time, the PICC can use the second carrier signal with the same frequency and phase as the first carrier signal received, and can modulate the second modulation signal to be sent by the PICC side on the second carrier signal to be sent by the PICC side superior. It can be understood that the phase deviation of the second carrier signal to be sent by the PICC side and the first carrier signal sent by the PCD side is θ. Because the device link of NFC is usually symmetrical, that is to say, when the PICC sends the carrier signal to the PCD, the same phase deviation (for example, the phase deviation is θ) will also be generated. For example, the PICC sends the second modulated signal to be sent by the PICC side to the PCD through the transmitter 21 , where the second modulated signal sent by the PICC includes a second carrier signal with a phase of θ. However, after being processed by the transceiver circuit 13, the antenna 14, the transceiver circuit 23 and the antenna 24, the phase of the second modulated signal received by the PCD receiver 12 is the same as the one sent by the PICC due to the phase deviation caused by the link. The phase deviation of the second modulated signal is also θ. It can be understood that the phase of the second modulated signal received by the receiver 12 of the PCD is offset from the phase of the first carrier signal sent by the transmitter 11 of the PCD by 2*θ. In addition, when the PCD sends the first modulated signal to the PICC, a phase deviation similar to the above will also be generated. For details, reference may be made to the phase deviation of the first carrier signal, which will not be repeated here.

FIG. 2 is a waveform diagram of the first carrier signal sent by the PCD side and the second modulated signal sent by the PICC side.

FIG. 3 is a waveform diagram of the second modulated signal received by the PCD side. As shown in FIG. 3 , the waveform 310 represents a waveform with a phase deviation of 0 degrees. The waveform 310 represents the second modulated signal received by the PCD, and the phase difference between it and the first carrier signal sent by the PCD is 0. Because The phase difference between the second modulated signal and the first carrier signal is equal to the phase difference between the second modulated signal and the first carrier signal, which means that the phase difference between the second modulated signal and the first carrier signal is 0 , at this time, it means that the system is in an ideal state, and there is no phase difference between PCD and PICC. Similarly, waveform 320 is a waveform with a phase deviation of 45 degrees, indicating that the phase difference between the second modulated signal received by the PCD and the first carrier signal sent by the PCD side is 45 degrees; waveform 330 is a waveform with a phase deviation of 90 degrees Figure; waveform 340 is a waveform diagram with a phase deviation of 180 degrees. Referring to FIG. 3 , when the phase deviation is 0, 45 or 90 degrees, the amplitude of the second modulated signal received by the PCD does not fluctuate significantly, while when the phase deviation is 180 degrees, the second modulated signal received by the PCD is 180 degrees. The amplitude of the modulated signal is reversed, which will seriously affect the demodulation of the PCD. In an actual circuit, the carrier signal between the PCD and the PICC generally produces a relatively serious phase deviation.

It can be seen from the above Figures 2 and 3 that due to the influence of the link processing, the carrier signal between the PCD and the PICC will have a serious phase deviation, which will affect the demodulation of the PCD, and then affect the PCD and the PICC. Communication between PICCs.

Based on the above problems, an embodiment of the present application proposes a signal transmission method. By compensating the phase of the carrier signal on the PICC side, the phase deviation of the carrier signal generated in the link processing can be eliminated, and the communication caused by the phase deviation can be avoided. reduction in efficiency.

The signal transmission method provided by the embodiment of the present application will now be described with reference to FIG. 4 to FIG. 11 . FIG. 4 is an application scenario of an embodiment of the present application. As shown in FIG. 4 , the above application scenario includes a first electronic device 410 and a second electronic device 420 . Exemplarily, the first electronic device 410 may be the aforementioned PCD (eg, a gate, etc.), and the second electronic device 420 may be the aforementioned PICC (eg, a mobile phone, etc.). Of course, the PCD can also be a mobile phone working in a card reader mode, and the PICC can be a mobile phone or other electronic device working in a card emulation mode. The embodiments of the present application do not specifically limit the specific forms of the first electronic device 410 and the second electronic device 420 for implementing the technical solution. It can be understood that the embodiments of the present application may be applied to an NFC scenario, for example, the first electronic device 410 and the second electronic device 420 may communicate through NFC. The embodiments of the present application may also be applied to other short-range communication scenarios, for example, communication between the first electronic device 410 and the second electronic device 420 may be performed by means of RFID. This embodiment of the present application does not specifically limit the short-range communication manner.

FIG. 5 is a schematic flowchart of an embodiment of the signal transmission method provided by the embodiment of the present application. In order to facilitate the public to fully understand the complete solution of the present application, the steps to be performed by the PCD and the PICC at different stages are integrated into the steps of the process according to the timeline. In the description, but it should be understood that for the PICC that implements signal transmission, it only needs to perform those steps that need to be performed in the process during the signal transmission process, that is, it can be understood that the signal transmission method provided by the embodiment of the application performs The main body is mainly PICC:

Step 101 , the first electronic device 410 sends a first carrier signal to the second electronic device 420 .

Specifically, taking the first electronic device 410 as a PCD and the second electronic device 420 as a PICC as an example, the first electronic device 410 can periodically send the first carrier signal to the second electronic device 420, that is, it can complete multiple cycles in multiple cycles. The transmission of a first carrier signal. Wherein, the period can be preset. The size of the period is not particularly limited in this application. It can be understood that, the above-mentioned periodic sending method is only illustrative of the sending method of the first carrier signal of the first electronic device 410, and the first electronic device 410 can also send the first electronic device 420 to the second electronic device 420 in an aperiodic manner. carrier signal. The foregoing manner in which the first electronic device 410 sends the first carrier signal to the second electronic device 420 does not constitute a limitation to the embodiments of the present application.

Step 102, the second electronic device 420 adjusts the impedance of the second transceiving link, and receives the first carrier signal sent by the first electronic device 410, based on the first carrier signal received by the second electronic device 420 and the second transceiving link The impedance determines the equivalent link.

Specifically, the second electronic device 420 may receive multiple first carrier signals sent by the first electronic device 410 within a preset time period. During specific implementation, the above-mentioned preset time period may be determined according to the period at which the above-mentioned first electronic device 410 sends the first carrier signal. It can be understood that, within the above-mentioned preset time period, the second electronic device 420 can receive multiple first carrier signals periodically sent by the first electronic device 410, and the second electronic device 420 can also receive the first electronic device 410 aperiodically. For the multiple first carrier signals sent, the manner in which the second electronic device 420 receives the first carrier signal sent by the first electronic device 410 does not constitute a limitation on the embodiments of the present application.

During specific implementation, the second electronic device 420 may respectively receive the first carrier signal sent by the first electronic device 410 at different times within the foregoing preset time period. Exemplarily, the second electronic device 420 may receive the first carrier signal s1 at time t1, the second electronic device 420 may receive the first carrier signal s2 at time t2, and the second electronic device 420 may receive the first carrier signal s2 at time t3. The first carrier signal s3 and so on.

When the first electronic device 410 communicates with the second electronic device 420 , the phase deviation of the signal is caused by the transceiving link of the first electronic device 410 and the transceiving link of the second electronic device 420 . Therefore, in order to calculate the phase deviation of the carrier signal, an equivalent link can be simulated, and the equivalent link can include the transceiving link (first transceiving link) of the first electronic device 410 and the transceiving link of the second electronic device 420 link (second transceiver link). Therefore, after the second electronic device 420 receives the first carrier signal sent by the first electronic device 410, it can be determined based on the equivalent link that the first carrier signal sent by the first electronic device 410 is received by the second electronic device 420. phase deviation between the received first carrier signals, and then phase compensation can be performed on the second carrier signal to be sent by the second electronic device 420 according to the phase deviation. FIG. 6 is a schematic diagram of an equivalent link structure between the PCD and the PICC. Exemplarily, the equivalent link g(ω) can be expressed by the following formula:

g(ω)=x+j*y. where x and y are the equivalent coefficients of the equivalent link.

Next, the mapping relationship between the first carrier signal St sent by the first electronic device 410 and the first carrier signal Sr received by the second electronic device 420 can be obtained through the above equivalent link, and the mapping relationship can be expressed by the following formula :

where R is the equivalent resistance on the PICC side. θ is the phase deviation between the first carrier signal St sent by the first electronic device 410 and the first carrier signal Sr received by the second electronic device 420 . It can be understood that, since the equivalent link has symmetry, the θ can also be the phase between the second carrier signal sent by the second electronic device 420 and the second carrier signal received by the first electronic device 410 deviation.

From the above-mentioned schematic diagram of the equivalent link structure and the equivalent link formula in FIG. 6, the corresponding phase deviation calculation formula can be obtained:

It can be seen from the above phase deviation formula that the phase deviation θ is related to the equivalent resistance R on the PICC side.

Next, the second electronic device 420 may change the impedance of the equivalent resistance R. During specific implementation, the second electronic device 420 may periodically change the impedance of the equivalent resistance R within a preset time period. For example, the second electronic device 420 can change the impedance of the equivalent resistance R at three different times, for example, time t1', time t2', and time t3', so that the equivalent resistances at three different times can be obtained respectively. The impedance of R, eg, R1, R2, and R3. It can be understood that, after the first carrier signal sent by the first electronic device 410 at the above three different times is processed by the equivalent resistance R of different values, the second electronic device 420 can respectively receive three different phases of the first carrier signal. The first carrier signal, exemplarily, the impedance R1 of the equivalent resistance R at time t1' corresponds to the first carrier signal s1 at time t1, and the first carrier signal s1 may have a phase θ ₁ ; The impedance R2 corresponds to the first carrier signal s2 at time t2, and the first carrier signal s2 may have a phase θ ₂ ; the impedance R3 of the equivalent resistance R at time t3' corresponds to the first carrier signal s3 at time t3, and the first carrier signal s3 may has phase θ ₃ . It can be understood that, the second electronic device 420 can also change the impedance of the equivalent resistance R at different times in an aperiodic manner. The above manner of changing the impedance of the equivalent resistance R at different times does not constitute a limitation to the embodiments of the present application. Exemplarily, the second electronic device 420 may change the impedance of the equivalent resistance R after receiving the first carrier signal sent by the first electronic device 410 .

From this, the following simultaneous formula can be obtained:

From the above formula (1) and formula (2), the following formula can be obtained:

From the above formula (2) and formula (3), the following formula can be obtained:

Wherein, θ ₁ -θ ₂ is the phase difference between the first carrier signal s1 and the first carrier signal s2 after passing through the equivalent link, and θ ₂ -θ ₃ is the phase difference between the first carrier signal s1 and the first carrier signal after passing through the equivalent link The phase difference between the signal s2 and the first carrier signal s3. The above-mentioned phase difference can be obtained by the above-mentioned clock 205 . FIG. 7 is a schematic diagram of the phase difference. As shown in FIG. 7 , waveform 700 is the first carrier signal sent by the PCD side, waveform 710 may be the first carrier signal s1 received by the PICC side at time t1, and waveform 720 may be the first carrier signal received by the PICC side at time t2 s2, the waveform 730 may be the first carrier signal s3 received by the PICC side at time t3. Referring to FIG. 7 , the phase deviation between waveform 710 and waveform 700 is θ ₁ , the phase deviation between waveform 720 and waveform 700 is θ ₂ , and the phase deviation between waveform 730 and waveform 700 is θ ₃ . Then the phase difference between waveform 710 and waveform 720 is θ ₁ -θ ₂ , and the phase difference between waveform 720 and waveform 730 is θ ₂ -θ ₃ .

It should be noted that the above-mentioned changing the impedance of the equivalent resistance R at three different times is only an exemplary example, and does not constitute a limitation to the embodiments of the present application. In some embodiments, since the equivalent resistance R on the PICC side has an initial impedance R0 at the initial moment, the impedance of the equivalent resistance R (for example, R1 and R2 ) can also be changed at two different moments, so that it is also possible to obtain Impedance at three different times (eg, R0, R1, and R2).

Among the waveforms shown in FIG. 7 , for example, waveform 710 , waveform 720 , and waveform 730 , the 0-degree phase time can be obtained by the local clock. Wherein, the local clock may be a voltage-controlled oscillator (Voltage-Controlled Oscillator, VCO), or may be implemented by other devices, which is not particularly limited in this embodiment of the present application. Referring to FIG. 7 , through the above local clock, it can be easily obtained that the 0-degree phase moment of the waveform 710 is P1, the 0-degree phase moment of the waveform 720 is P2, and the 0-degree phase moment of the waveform 710 is P3, so it can be calculated according to P1 and P2 θ ₁ -θ ₂ is obtained, and θ ₂ -θ ₃ can be calculated from P2 and P3. It can be understood that θ ₁ -θ ₂ is the phase difference between the waveform 710 and the waveform 720. By calculating the time difference between the waveform 710 and the waveform 720 (for example, the time difference can be P1-P2), and through mathematical conversion, θ ₁ -θ ₂ can be obtained through the values of P1-P2; similarly, through the above method, θ ₂ -θ ₃ can also be obtained by calculating the values of P2-P3.

Optionally, when the 0-phase moment in the above waveform is detected by the local clock, the sampling frequency of the local clock can also be multiplied to increase the sampling frequency of the local clock, so that the above waveform can be obtained more accurately. The 0-phase moment in , and then the calculation accuracy of the phase deviation can be improved. The multiplier may be n, and the value of n may be preset. Exemplarily, the value of n may depend on the precision of the phase deviation. Preferably, the value of n may be 384.

8 is a schematic diagram of a local clock frequency multiplication, a waveform 800 is a schematic diagram of a waveform before the local clock frequency multiplication, and a waveform 810 is a schematic diagram of a waveform after the local clock frequency multiplication.

When the above values of θ ₁ -θ ₂ and θ ₂ -θ ₃ are obtained, since R1, R2 and R3 are known quantities, x and y can be obtained by combining formula (4) and formula (5), From this, the corresponding phase deviation calculation formula can be obtained:

It can be understood that the above phase deviation calculation formula represents the phase deviation generated by the first carrier signal sent by the PCD side after passing through the equivalent link. Similarly, due to the symmetry of the equivalent link, the above phase deviation calculation formula can also represent the phase deviation generated by the second carrier signal sent by the PICC side after passing through the equivalent link. It should be noted that the phase of the second modulated signal sent by the PICC side is the same as the phase of the second carrier signal sent by the PICC side. Therefore, the above phase deviation calculation formula can also indicate that the second modulated signal sent by the PICC side has the same phase. The phase deviation produced by the second modulated signal after passing through the equivalent link.

Step 103, the second electronic device 420 determines the phase deviation of the carrier signal based on the equivalent link.

Specifically, after obtaining the above formula (6), the working state of the second electronic device 420 can be obtained. The working state may be used to characterize the current impedance of the equivalent resistance R in the second electronic device 420 . Wherein, the current impedance of the equivalent resistance R may be a value at the initial moment, for example, R0; the current impedance of the equivalent resistance R may also be a value at other moments, such as R1 or R2, etc.

If the current impedance of the equivalent resistance R in the second electronic device 420 is R0, then R0 can be substituted into the above formula (6), so that the phase deviation of the carrier signal can be calculated. The phase deviation generated on the PICC side after a carrier signal passes through the equivalent link, that is, the phase deviation of the carrier signal is the phase between the first carrier signal sent by the PCD side and the first carrier signal received by the PICC side difference. Therefore, phase compensation can be performed on the second carrier signal based on the phase deviation of the carrier signal, so as to eliminate the phase deviation of the second carrier signal during the communication process.

If the current impedance of the equivalent resistance R in the second electronic device 420 is another value, exemplarily, the value may be R1, R2 or R3, etc., then the above R1, R2 or R3 can be substituted into the above formula (6), thus The phase deviation of the carrier signal of the second electronic device 420 when the impedance of the equivalent resistance R is R1, R2 or R3 can be calculated.

Step 104 , the first electronic device 410 sends the first modulated signal to the second electronic device 420 .

Specifically, the first electronic device 410 may also send the first modulated signal to the second electronic device 420 . The first modulated signal sent by the first electronic device 410 includes the first carrier signal sent by the first electronic device 410 and the first modulated signal sent by the first electronic device 410. For example, the first electronic device 410 can The sent first modulated signal is modulated on the first carrier signal sent by the first electronic device 410 , thereby obtaining the first modulated signal sent by the first electronic device 410 .

Step 105, the second electronic device 420 receives the first modulated signal sent by the first electronic device 410, and determines the phase difference between the first carrier signal and the first modulated signal based on the received first modulated signal.

Specifically, after receiving the first modulated signal sent by the first electronic device 410, the second electronic device 420 can separate the first modulated signal received by the second electronic device 420, thereby obtaining the second modulated signal. The first carrier signal and the first modulated signal in the first modulated signal received by the electronic device 420 . The above separation manner may be implemented by a mixer or by other devices, which is not limited in this embodiment of the present application.

Next, the second electronic device 420 may determine the frame start point (Start of Frame, SOF) of the first modulated signal received by the second electronic device 420 through the threshold decider. It is understood that the above threshold decider is only exemplary The method for determining the frame start point is shown, which does not constitute a limitation to the embodiments of the present application. In some embodiments, the frame start point may also be determined by other methods.

In addition, the second electronic device 420 can also detect the 0-phase moment of the first carrier signal received by the above-mentioned second electronic device 420 through the local clock, thereby obtaining the 0-phase moment. It can be understood that the second electronic device 420 can also detect the 0-phase moment of the first carrier signal received by the second electronic device 420 after multiplying the sampling frequency of the local clock. For the detection method of the above-mentioned 0-phase moment, reference may be made to step 102, which will not be repeated here.

After the frame start point of the first modulated signal received by the second electronic device 420 and the 0-phase moment of the first carrier signal received by the second electronic device 420 are obtained, the frame start point of the first modulated signal received by the second electronic device 420 can be The frame start point of the first modulated signal and the 0-phase moment of the first carrier signal received by the second electronic device 420 are calculated to obtain the first modulated signal received by the second electronic device 420 and the first modulated signal received by the second electronic device 420. The phase difference between a carrier signal. Since the equivalent link has symmetry, by obtaining the phase difference between the first modulated signal received by the second electronic device 420 and the first carrier signal received by the second electronic device 420, the first electronic device 410 can be calculated The phase difference between the received second modulated signal and the second carrier signal received by the first electronic device 410, so that the phase compensation can be performed on the second modulated signal sent by the second electronic device 420 based on the phase difference, to The phase difference generated during the transmission process between the second modulated signal sent by the second electronic device 420 and the second carrier signal sent by the second electronic device 420 is eliminated.

FIG. 9 is a schematic diagram of phase difference calculation. As shown in FIG. 9 , waveform 900 is the waveform of the first carrier signal received by the second electronic device 420 , waveform 910 is the waveform of the first modulation signal received by the second electronic device 420 , and waveform 920 is the frequency multiplication of the local clock waveform, waveform 930 is the waveform of the threshold decider. The 0-phase time Q1 of the waveform 900 can be detected by the waveform 920 , and the frame start point Q2 in the waveform 910 can be detected by the waveform 930 . Based on Q1 and Q2, the phase difference between the first modulated signal received by the second electronic device 420 and the first carrier signal received by the second electronic device 420 can be determined. Exemplarily, the value of Q1-Q2 can be calculated through mathematics. The phase difference between the first modulated signal received by the second electronic device 420 and the first carrier signal received by the second electronic device 420 is obtained by conversion.

Step 106, the second electronic device 420 performs phase compensation on the second modulated signal based on the phase difference between the carrier signal and the modulated signal, and performs phase compensation on the second modulated signal based on the phase deviation of the carrier signal.

Specifically, after the second electronic device 420 obtains the above-mentioned phase deviation of the carrier signal and the phase difference between the carrier signal and the modulated signal, the second electronic device 420 can determine the data to be sent by the second electronic device 420 based on the phase difference between the carrier signal and the modulated signal. The second modulated signal is phase compensated. In a specific implementation, the phase compensation of the second modulated signal to be sent by the second electronic device 420 may be to adjust the second modulated signal to be sent by the second electronic device 420 based on the phase difference between the carrier signal and the modulated signal phase, modulate the phase-adjusted second modulated signal on the second carrier signal to be sent by the second electronic device 420 , thereby obtaining the second modulated signal to be sent by the second electronic device 420 . Wherein, the second carrier signal to be sent by the second electronic device 420 may be a carrier signal of the same frequency and phase as the first carrier signal received by the second electronic device 420, that is, the second electronic device 420 to be The sent second carrier signal has the same frequency and phase as the first carrier signal received by the second electronic device 420, and the second carrier signal to be sent by the second electronic device 420 is the same as the first carrier signal sent by the first electronic device 410. A carrier signal has the same frequency but different phases.

The description will now be made with reference to FIG. 10 . As shown in FIG. 10 , the waveform 1000 is the waveform of the second carrier signal to be sent by the second electronic device 420 , and the waveform 1010 is the waveform of the second modulation signal to be sent by the second electronic device 420 . Since the phase difference between the first carrier signal received by the second electronic device 420 and the first modulated signal received by the second electronic device 420 is Δθ, the first carrier signal received by the second electronic device 420 and the The phase difference Δθ of the first modulated signal received by the second electronic device 420 performs phase compensation on the second modulated signal (eg, waveform 1010 ) to be sent by the second electronic device 420 . Exemplarily, the phase of the waveform 1000 may be used as a reference, and the waveform 1010 may be advanced by Δθ phase based on the waveform 1000, thereby obtaining the waveform 1020, which is the phase-compensated second electronic device 420 to be sent. the second modulated signal. At this time, due to the phase compensation, after the first electronic device 410 receives the second modulation signal sent by the second electronic device 420 and the second carrier signal sent by the second electronic device 420, the second electronic device 410 can There is no longer a phase difference between the second modulated signal sent by the device 420 and the second carrier signal sent by the second electronic device 420, so that the second modulated signal sent by the second electronic device 420 and the second modulated signal sent by the second electronic device 420 can be eliminated. Influenced by the phase difference between the second carrier signals, the first electronic device 410 can smoothly demodulate the second modulated signal sent by the second electronic device 420.

Next, the second electronic device 420 may modulate the second modulation signal to be sent by the second electronic device 420 on the second carrier signal to be sent by the second electronic device 420 ; for example, the waveform 1020 may be modulated on the waveform 1000 , so that the second modulated signal to be sent by the second electronic device 420 can be obtained, and phase compensation can be performed on the second modulated signal to be sent by the second electronic device 420 based on the phase deviation of the carrier signal. In specific implementation, the phase of the second modulated signal to be sent by the second electronic device 420 can be adjusted based on the phase deviation of the carrier signal, thereby eliminating the phase deviation brought by the above link to the second carrier signal.

The description will now be made with reference to FIG. 11 . As shown in FIG. 11 , waveform 1100 is the waveform of the first carrier signal sent by the first electronic device 410 , waveform 1110 is the waveform of the first carrier signal received by the second electronic device 420 , and waveform 1120 is the waveform of the first carrier signal received by the second electronic device 420 . The waveform of the second modulated signal sent. Among them, the phase deviation between the waveform 1100 and the waveform 1110 is θ. Since the phase deviation of the first carrier signal sent by the first electronic device 410 and the first carrier signal received by the second electronic device 420 is θ, and the second modulated signal sent by the second electronic device 420 is transmitted by the second electronic device 420 The received first carrier signal is obtained by modulation, that is, the phase of the second modulated signal to be sent by the second electronic device 420 is the same as the phase of the first carrier signal received by the second electronic device. Therefore, the second modulated signal (for example, waveform 1120 ) to be sent by the second electronic device 420 can be advanced by 2*θ phase based on the second carrier signal to be sent by the second electronic device 420 , at this time, it can be obtained Phase compensated second modulated signal (eg, waveform 1130). Therefore, after the first electronic device 410 receives the second modulated signal sent by the second electronic device 420, the phase deviation of the second modulated signal sent by the second electronic device 420 has been compensated, that is to say , the phase of the second carrier signal in the second modulated signal received by the first electronic device 410 is consistent with the phase of the first carrier signal sent by the first electronic device 410 , so that the first electronic device 410 can demodulate correctly. The compensated phase deviation may include the phase deviation θ caused when the first electronic device 410 sends the first carrier signal to the second electronic device 420 , and the second electronic device 420 sends the second modulated signal to the first electronic device 410 Therefore, the phase compensation amount of the second modulated signal to be sent by the second electronic device 420 is 2*θ.

Step 107 , the second electronic device 420 sends the phase-compensated second modulated signal to the first electronic device 410 .

In this embodiment, by converting the equivalent link between the first electronic device and the second electronic device, the phase deviation brought by the link to the carrier signal is obtained, and the phase deviation of the carrier signal is performed based on the phase deviation. Therefore, the influence of the phase deviation on the signal demodulation at the receiving end can be eliminated, and the communication quality can be improved.

FIG. 12 is a schematic structural diagram of an embodiment of the signal transmission apparatus of the present application. As shown in FIG. 12 , the above-mentioned signal transmission apparatus 1200 is applied to a second electronic device. The second electronic device includes a second transceiver link for sending and receiving signals. The impedance of the second transceiver link is adjustable, and may include: an adjustment module 1210, a reception module 1220, a first determination module 1230, a calculation module 1240, a first compensation module 1250, and a transmission module 1260; wherein,

an adjustment module 1210, configured to adjust the impedance of the second transceiver link at multiple different times, so that the second transceiver link has different impedances at multiple different times;

The receiving module 1220 is configured to respectively receive multiple first carrier signals sent by the first electronic device when the second transceiving link has multiple different impedances, and obtain multiple first carrier signals received by the second electronic device;

The first determination module 1230 is configured to determine the mapping relationship between the phase deviation and the impedance based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device; wherein the phase deviation is used to characterize the transmission of the first electronic device The phase difference value between the first carrier signal and the first carrier signal received by the second electronic device;

a calculation module 1240, configured to obtain the current impedance of the second transceiver link, and determine the current phase deviation based on the current impedance and the mapping relationship;

The first compensation module 1250 is used to obtain the second carrier signal and the second modulation signal, modulate the second modulation signal on the second carrier signal, and obtain the second modulated signal; phase compensation,

The sending module 1260 is configured to send the second modulated signal obtained after the phase compensation to the first electronic device.

In one possible implementation manner, the above-mentioned adjustment module 1210 is further configured to periodically adjust the impedance of the second transceiving link within a preset time period.

In one possible implementation manner, the second transceiver link includes an initial impedance, and the adjustment module 1210 is further configured to adjust the impedance of the second transceiver link in two cycles within a preset time period, wherein the three impedances Includes initial impedance and two adjustment impedances.

In one possible implementation manner, the adjustment module 1210 is further configured to adjust the impedance of the second transceiver link in three cycles within a preset time period, wherein the three impedances include three adjustment impedances.

In one possible implementation manner, the above-mentioned apparatus 1200 further includes: a second determining module 1270; wherein,

The second determining module 1270 is configured to receive multiple first modulated signals sent by the first electronic device at different times respectively, and obtain multiple first modulated signals received by the second electronic device, wherein the first electronic device sends The plurality of first modulated signals include the first carrier signal and the first modulated signal sent by the first electronic device, and the first modulated signal received by the second electronic device includes the first carrier signal received by the second electronic device and The first modulated signal; obtain the 0-phase moment of the first carrier signal received by the second electronic device and the frame start point moment of the first modulated signal received by the second electronic device, based on the first carrier wave received by the second electronic device The 0-phase moment of the signal and the frame start point moment of the first modulated signal received by the second electronic device determine the phase difference, where the phase difference is used to characterize the first carrier signal received by the second electronic device and the second electronic device. Phase difference value between the received first modulated signals.

In one possible implementation manner, the above-mentioned apparatus 1200 further includes: a clock module 1280; wherein,

The clock module 1280 is configured to sample the first carrier signal received by the second electronic device to obtain the 0-phase moment of the first carrier signal received by the second electronic device.

In one possible implementation manner, the above clock module 1280 is further configured to perform n-multiplier on the sampling frequency, where n is a constant, and n is determined by the precision of the phase deviation; for the first carrier signal received by the second electronic device Sampling is performed to obtain the 0-phase moment of the first carrier signal received by the second electronic device.

In one possible implementation manner, the above-mentioned apparatus 1200 further includes: a second compensation module 1290; wherein,

The second compensation module 1290 is configured to perform phase compensation on the second modulated signal based on the phase difference.

In one possible implementation manner, the above-mentioned first compensation module 1250 is further configured to advance the phase of the second modulated signal by twice the phase deviation.

In one possible implementation manner, the first electronic device includes a first transceiving link for transceiving signals, the first transceiving link and the second transceiving link form an equivalent link for signal transmission, and the first determining module above 1230 is further configured to determine the coefficients of the equivalent link based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, and the mapping relationship is represented by a formula including the coefficients.

It should be understood that the division of each module of the signal transmission apparatus shown in FIG. 12 above is only a division of logical functions, and may be fully or partially integrated into a physical entity in actual implementation, or may be physically separated. And these modules can all be implemented in the form of software calling through processing elements; they can also all be implemented in hardware; some modules can also be implemented in the form of software calling through processing elements, and some modules can be implemented in hardware. For example, the detection module may be a separately established processing element, or may be integrated in a certain chip of the electronic device. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together, and can also be implemented independently. In the implementation process, each step of the above-mentioned method or each of the above-mentioned modules can be completed by an integrated logic circuit of hardware in the processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more specific integrated circuits (Application Specific Integrated Circuit; hereinafter referred to as: ASIC), or, one or more microprocessors Digital Signal Processor (hereinafter referred to as: DSP), or, one or more Field Programmable Gate Array (Field Programmable Gate Array; hereinafter referred to as: FPGA), etc. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (System-On-a-Chip; hereinafter referred to as: SOC).

FIG. 13 is a schematic structural diagram of the electronic device 100 . The electronic device 100 may be the second electronic device 420 described above, and the electronic device 100 may be used to execute the functions/steps in the methods provided by the embodiments shown in FIG. 1 to FIG. 11 of the present application.

As shown in FIG. 13 , the electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, a display screen 194, and a subscriber identification module (subscriber). identification module, SIM) card interface 195, etc.

It can be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the electronic device 100 . In other embodiments of the present application, the electronic device 100 may include more or less components than shown, or combine some components, or separate some components, or arrange different components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural-network processing unit (neural-network processing unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

The controller can generate an operation control signal according to the instruction operation code and timing signal, and complete the control of fetching and executing instructions.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in processor 110 is cache memory. This memory may hold instructions or data that have just been used or recycled by the processor 110 . If the processor 110 needs to use the instruction or data again, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 110 is reduced, thereby increasing the efficiency of the system.

The wireless communication function of the electronic device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modulation and demodulation processor, the baseband processor, and the like.

Both antenna 1 and antenna 2 can be used to transmit and receive electromagnetic wave signals. Each antenna in terminal 100 may be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, the antenna 1 can be multiplexed into the diversity antenna of the wireless local area network. Of course, considering the simplicity of the design and the influence of other factors, each communication mode can also be equipped with a separate antenna. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide wireless communication solutions including 2G/3G/4G/5G etc. applied on the electronic device 100 . The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA) and the like. The mobile communication module 150 can receive electromagnetic waves from the antenna 1, filter and amplify the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modulation and demodulation processor, and then turn it into an electromagnetic wave for radiation through the antenna 1 . In some embodiments, at least part of the functional modules of the mobile communication module 150 may be provided in the processor 110 . In some embodiments, at least part of the functional modules of the mobile communication module 150 may be provided in the same device as at least part of the modules of the processor 110 .

The modem processor may include a modulator and a demodulator. Wherein, the modulator is used to modulate the low frequency baseband signal to be sent into a medium and high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator transmits the demodulated low-frequency baseband signal to the baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and passed to the application processor. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modulation and demodulation processor may be independent of the processor 110, and may be provided in the same device as the mobile communication module 150 or other functional modules.

The wireless communication module 160 can provide applications on the electronic device 100 including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellites Wireless communication solutions such as global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), and infrared technology (IR). The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2 , frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110 . The wireless communication module 160 can also receive the signal to be sent from the processor 110, perform frequency modulation on it, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2.

In some embodiments, the antenna 1 of the electronic device 100 is coupled with the mobile communication module 150, and the antenna 2 is coupled with the wireless communication module 160, so that the electronic device 100 can communicate with the network and other devices through wireless communication technology. The wireless communication technologies may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code Division Multiple Access (WCDMA), Time Division Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), BT, GNSS, WLAN, NFC, FM, and/or IR technology, etc. The GNSS may include a global positioning system (global positioning system, GPS), a global navigation satellite system (GLONASS), a Beidou navigation satellite system (BDS), a quasi-zenith satellite system (quasi -zenith satellite system, QZSS) and/or satellite based augmentation systems (SBAS).

The electronic device 100 implements a display function through a GPU, a display screen 194, an application processor, and the like. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

Display screen 194 is used to display images, videos, and the like. Display screen 194 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light). emitting diode, AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diode (quantum dot light emitting diodes, QLED) and so on. In some embodiments, the electronic device 100 may include one or N display screens 194 , where N is a positive integer greater than one.

Internal memory 121 may be used to store computer executable program code, which includes instructions. The internal memory 121 may include a storage program area and a storage data area. The storage program area can store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), and the like. The storage data area may store data (such as audio data, phone book, etc.) created during the use of the electronic device 100 and the like. In addition, the internal memory 121 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (UFS), and the like. The processor 110 executes various functional applications and data processing of the electronic device 100 by executing instructions stored in the internal memory 121 and/or instructions stored in a memory provided in the processor.

The SIM card interface 195 is used for connecting a SIM card. The SIM card can be contacted and separated from the electronic device 100 by inserting into the SIM card interface 195 or pulling out from the SIM card interface 195 . The electronic device 100 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 can support Nano SIM card, Micro SIM card, SIM card and so on. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of the plurality of cards may be the same or different. The SIM card interface 195 can also be compatible with different types of SIM cards. The SIM card interface 195 is also compatible with external memory cards. The electronic device 100 interacts with the network through the SIM card to implement functions such as calls and data communications. In some embodiments, the electronic device 100 employs an eSIM, ie: an embedded SIM card. The eSIM card can be embedded in the electronic device 100 and cannot be separated from the electronic device 100 .

In the above embodiments, the involved processors may include, for example, a CPU, a DSP, a microcontroller or a digital signal processor, and may also include a GPU, an embedded neural-network process unit (Neural-network Process Units; hereinafter referred to as: NPU) and Image signal processor (Image Signal Processing; hereinafter referred to as: ISP), the processor may also include necessary hardware accelerators or logic processing hardware circuits, such as ASIC, or one or more integrated circuits for controlling the execution of the program of the technical solution of the present application circuit, etc. Furthermore, the processor may have the function of operating one or more software programs, which may be stored in a storage medium.

Embodiments of the present application provide a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer instructions cause the computer to execute The signal transmission method provided by the embodiments shown in FIG. 1 to FIG. 11 of this specification.

The above-described non-transitory computer-readable storage media may employ any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (Read Only Memory) ; hereinafter referred to as: ROM), erasable programmable read only memory (Erasable Programmable Read Only Memory; hereinafter referred to as: EPROM) or flash memory, optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic memory components, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

A computer-readable signal medium may include a propagated data signal in baseband or as part of a carrier wave with computer-readable program code embodied thereon. Such propagated data signals may take a variety of forms including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device .

Program code embodied on a computer readable medium may be transmitted using any suitable medium including, but not limited to, wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out the operations of this specification may be written in one or more programming languages, including object-oriented programming languages—such as Java, Smalltalk, C++, but also conventional Procedural programming language - such as the "C" language or similar programming language. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or Wide Area Network (WAN), or it can Connect to an external computer (eg via the Internet using an Internet Service Provider).

The foregoing describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve desirable results. Additionally, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of this specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present specification, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing custom logical functions or steps of the process , and the scope of the preferred embodiments of this specification includes alternative implementations in which the functions may be performed out of the order shown or discussed, including performing the functions substantially concurrently or in the reverse order depending upon the functions involved, which should It is understood by those skilled in the art to which the embodiments of this specification belong.

In the several embodiments provided in this specification, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined. Either it can be integrated into another system, or some features can be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

In addition, each functional unit in each embodiment of this specification may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (Processor) to execute the methods described in the various embodiments of this specification. some steps. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (Read-Only Memory; hereinafter referred to as: ROM), Random Access Memory (Random Access Memory; hereinafter referred to as: RAM), magnetic disk or optical disk and other various A medium on which program code can be stored.

The above descriptions are only preferred embodiments of this specification, and are not intended to limit this specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this specification shall be included in this specification. within the scope of protection.

Claims

A signal transmission method, applied to a second electronic device, the second electronic device comprising a second transceiver link for transmitting and receiving signals, the impedance of the second transceiver link being adjustable, characterized in that the method include:

Adjust the impedance of the second transceiver link at multiple different times, so that the second transceiver link has different multiple impedances at the multiple different times;

Respectively receive multiple first carrier signals sent by the first electronic device when the second transceiver link has multiple different impedances, to obtain multiple first carrier signals received by the second electronic device;

Based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, a mapping relationship between the phase deviation and the impedance is determined; wherein the phase deviation is used to characterize the first electronic device The phase difference value between the first carrier signal sent by the device and the first carrier signal received by the second electronic device;

obtaining the current impedance of the second transceiver link, and determining the current phase deviation based on the current impedance and the mapping relationship;

obtaining a second carrier signal and a second modulated signal, and modulating the second modulated signal on the second carrier signal to obtain a second modulated signal;

Phase compensation is performed on the second modulated signal based on the current phase deviation, and the second modulated signal obtained after the phase compensation is sent to the first electronic device.
The method according to claim 1, wherein the adjusting the impedance of the second transceiver link at multiple different times comprises:

The impedance of the second transceiving link is periodically adjusted within a preset time period.
The method according to claim 2, wherein the second transceiving link comprises an initial impedance, and the periodically adjusting the impedance of the second transceiving link within a preset time period comprises:

The impedance of the second transceiving link is adjusted respectively in two cycles within a preset time period, wherein the three impedances include the initial impedance and the two adjusted impedances.
The method according to claim 2, wherein the periodically adjusting the impedance of the second transceiver link within a preset time period comprises:

The impedances of the second transceiving link are adjusted respectively in three cycles within a preset time period, wherein the three impedances include three adjusted impedances.
The method according to claim 1, wherein the method further comprises:

Respectively receive multiple first modulated signals sent by the first electronic device at different times to obtain multiple first modulated signals received by the second electronic device, wherein the multiple first modulated signals sent by the first electronic device are obtained. The first modulated signal includes a first carrier signal and a first modulated signal sent by the first electronic device, and the first modulated signal received by the second electronic device includes a first modulated signal received by the second electronic device. a carrier signal and a first modulation signal;

Obtain the 0-phase moment of the first carrier signal received by the second electronic device and the frame start point moment of the first modulated signal received by the second electronic device, based on the first The 0-phase moment of the carrier signal and the frame start point moment of the first modulated signal received by the second electronic device determine the phase difference, where the phase difference is used to represent the first signal received by the second electronic device. The phase difference value between the carrier signal and the first modulated signal received by the second electronic device.
The method according to claim 5, wherein the second electronic device comprises a clock module, and the 0-phase moment of the first carrier signal received by the second electronic device is obtained after sampling by the clock module.
The method according to claim 6, wherein the sampling by the clock module comprises:

Multiply the sampling frequency of the clock module by n, wherein n is a constant, and n is determined by the precision of the phase deviation;

Based on the clock module obtained by multiplying the sampling frequency by n, sampling the first carrier signal received by the second electronic device to obtain the 0-phase moment of the first carrier signal received by the second electronic device .
The method according to claim 5, wherein before performing phase compensation on the second modulated signal based on the phase deviation, the method further comprises:

Phase compensation is performed on the second modulated signal based on the phase difference.
The method according to any one of claims 1-8, wherein the performing phase compensation on the second modulated signal based on the phase deviation comprises:

The phase of the second modulated signal is advanced by twice the phase offset.
The method according to any one of claims 1-9, wherein the first electronic device comprises a first transceiving link for transceiving signals, the first transceiving link and the second transceiving link An equivalent link of signal transmission is formed by the signal transmission channel, and the determining of the mapping relationship between the phase deviation and the impedance based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device specifically includes:

Based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, coefficients of the equivalent link are determined, and the mapping relationship is characterized by a formula including the coefficients.
The method according to any one of claims 1-9, wherein the frequency of the first carrier signal and the second carrier signal are the same.
A second electronic device, the second electronic device includes a second transceiving link for transceiving signals, and the impedance of the second transceiving link is adjustable, characterized in that it comprises: a memory, the memory is used for Stores computer program code, the computer program code including instructions that, when read from the memory by the second electronic device, cause the second electronic device to perform the following steps:

Adjust the impedance of the second transceiver link at multiple different times, so that the second transceiver link has different multiple impedances at the multiple different times;

Respectively receive multiple first carrier signals sent by the first electronic device when the second transceiver link has multiple different impedances, to obtain multiple first carrier signals received by the second electronic device;

Based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, a mapping relationship between the phase deviation and the impedance is determined; wherein the phase deviation is used to characterize the first electronic device The phase difference value between the first carrier signal sent by the device and the first carrier signal received by the second electronic device;

obtaining the current impedance of the second transceiver link, and determining the current phase deviation based on the current impedance and the mapping relationship;

obtaining a second carrier signal and a second modulated signal, and modulating the second modulated signal on the second carrier signal to obtain a second modulated signal;

Phase compensation is performed on the second modulated signal based on the current phase deviation, and the second modulated signal obtained after the phase compensation is sent to the first electronic device.
The second electronic device according to claim 12, wherein when the instruction is executed by the second electronic device, the second electronic device adjusts the second transceiving chain at a plurality of different times. The steps of the impedance of the circuit include:

The impedance of the second transceiving link is periodically adjusted within a preset time period.
The second electronic device according to claim 13, wherein the second transceiving link comprises an initial impedance, and when the instruction is executed by the second electronic device, the second electronic device executes the pre-defined impedance. The step of periodically adjusting the impedance of the second transceiving link within a set time period includes:

The impedance of the second transceiving link is adjusted respectively in two cycles within a preset time period, wherein the three impedances include the initial impedance and the two adjusted impedances.
The second electronic device according to claim 13, characterized in that, when the instruction is executed by the second electronic device, the second electronic device executes to periodically adjust the second electronic device within a preset time period. The steps of transceiving the impedance of the link include:

The impedances of the second transceiving link are adjusted respectively in three cycles within a preset time period, wherein the three impedances include three adjusted impedances.
The second electronic device according to claim 12, wherein when the instruction is executed by the second electronic device, the second electronic device further performs the following steps:

Respectively receive multiple first modulated signals sent by the first electronic device at different times to obtain multiple first modulated signals received by the second electronic device, wherein the multiple first modulated signals sent by the first electronic device are obtained. The first modulated signal includes a first carrier signal and a first modulated signal sent by the first electronic device, and the first modulated signal received by the second electronic device includes a first modulated signal received by the second electronic device. a carrier signal and a first modulation signal;

Obtain the 0-phase moment of the first carrier signal received by the second electronic device and the frame start point moment of the first modulated signal received by the second electronic device, based on the first The 0-phase moment of the carrier signal and the frame start point moment of the first modulated signal received by the second electronic device determine the phase difference, where the phase difference is used to represent the first signal received by the second electronic device. The phase difference value between the carrier signal and the first modulated signal received by the second electronic device.
The second electronic device according to claim 16, wherein the second electronic device comprises a clock module, wherein the 0-phase moment of the first carrier signal received by the second electronic device is sampled by the clock module obtained later.
The second electronic device according to claim 17, wherein when the instruction is executed by the second electronic device, the step of causing the second electronic device to execute the clock module to perform sampling comprises:

Multiply the sampling frequency of the clock module by n, wherein n is a constant, and n is determined by the precision of the phase deviation;

Based on the clock module obtained by multiplying the sampling frequency by n, sampling the first carrier signal received by the second electronic device to obtain the 0-phase moment of the first carrier signal received by the second electronic device .
The second electronic device according to claim 16, characterized in that, when the instruction is executed by the second electronic device, the second electronic device causes the second electronic device to perform a modification of the second modulated signal based on the phase deviation. Before the step of phase compensation, also perform the following steps:

Phase compensation is performed on the second modulated signal based on the phase difference.
The second electronic device according to any one of claims 12-19, characterized in that, when the instruction is executed by the second electronic device, the second electronic device causes the second electronic device to execute the adjustment of the phase deviation based on the phase deviation. The step of performing phase compensation on the second modulated signal includes:

The phase of the second modulated signal is advanced by twice the phase offset.
The second electronic device according to any one of claims 12-20, wherein the first electronic device comprises a first transceiving link for transceiving signals, the first transceiving link and the first transceiving link The two transceiver links form an equivalent link for signal transmission. When the instruction is executed by the second electronic device, the second electronic device causes the second electronic device to execute a plurality of first carrier signals received by the second electronic device. and the plurality of impedances, the step of determining the mapping relationship between the phase deviation and the impedances includes:

Based on the plurality of first carrier signals and the plurality of impedances received by the second electronic device, coefficients of the equivalent link are determined, and the mapping relationship is represented by a formula including the coefficients.
The second electronic device according to any one of claims 12-20, wherein the first carrier signal and the second carrier signal have the same frequency.
A computer-readable storage medium, characterized by comprising computer instructions, when the computer instructions are executed on the second electronic device, the second electronic device is made to execute any one of claims 1-11 The described signal transmission method.
A computer program product, characterized in that, when the computer program product runs on a computer, the computer is caused to execute the signal transmission method according to any one of claims 1-11.