CN112636892A - Full-duplex communication method and system - Google Patents
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Abstract
The invention discloses a full duplex communication method and a system, wherein the method comprises the following steps: the first communication terminal acquires and codes first data to be transmitted to generate a first signal and a second signal, and the second communication terminal acquires and codes second data to be transmitted to generate a third signal and a fourth signal; the second communication terminal collects a first mutual inductance signal generated based on the first signal and the second signal, decodes the collected first mutual inductance signal, identifies a corresponding first signal and a second signal from the decoded first mutual inductance signal, and decodes a second mutual inductance signal generated based on the third signal and the fourth signal to obtain a corresponding third signal and a corresponding fourth signal. The invention separates the superposed signals by decoding the mutual inductance signals, identifies effective mutual inductance signals, and realizes full duplex communication which saves system resources and is not easy to be interfered.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a full-duplex communication method and system.
Background
With the development of communication technology, full duplex communication has been applied to various scenarios, and communication data in the form of square waves is used for communication in general full duplex communication systems, but the communication data in the form of square waves is easily interfered by pulses, resulting in incomplete communication data. In the conventional method, the same communication data is usually transmitted multiple times, but the integrity of the communication data cannot be completely guaranteed, and communication delay is caused. In view of this, how to implement efficient full duplex communication while ensuring the integrity of communication data becomes an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a full-duplex communication method and a system, which can realize full-duplex communication which is not easy to be interfered.
In order to achieve the purpose, the invention adopts the following technical scheme:
a full duplex communication method, comprising:
a first communication terminal acquires first data to be transmitted, encodes the first data to be transmitted and generates a first signal and a second signal;
the first communication terminal sends the first signal and the second signal to a second communication terminal alternately;
a second communication terminal acquires second data to be sent, codes the second data to be sent and generates a third signal and a fourth signal;
the second communication terminal alternately transmits the third signal and the fourth signal to the first communication terminal;
the second communication terminal collects a first mutual inductance signal generated based on the first signal and the second signal, decodes the collected first mutual inductance signal, and identifies a corresponding first signal and a corresponding second signal from the decoded first mutual inductance signal;
the first communication terminal collects a second mutual inductance signal generated based on the third signal and the fourth signal, decodes the collected second mutual inductance signal, and identifies a corresponding third signal and a corresponding fourth signal from the decoded second mutual inductance signal.
Further, encoding the first data to be transmitted to generate a first signal and a second signal, including:
and converting the first data to be transmitted into a binary format, and respectively compiling a first signal and a second signal according to the bit value of the converted first data to be transmitted.
Further, decoding the acquired first mutual inductance signal includes:
the second communication terminal performs analog-to-digital conversion on the first mutual inductance signal after acquiring the first mutual inductance signal;
acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted first mutual inductance signal of the sampling number in the sampling period;
and performing FFT operation on the first mutual inductance signals of the sampling number to obtain frequency domain data values of the first mutual inductance signals, and identifying the first mutual inductance frequency according to the frequency domain data values.
Further, obtaining the sampling period and the number of samples in each of the sampling periods comprises:
obtaining a preset first frequency, a preset second frequency, a preset third frequency and a preset fourth frequency, and screening to obtain a maximum frequency FMAXAnd a minimum value FMin；
Obtaining a sampling period T and a sampling number N, wherein the sampling period T is 1/2FMinThe number of samples N is greater than or equal to T/2FMAX。
Further, identifying a corresponding first signal and second signal from the decoded first mutual inductance signal, comprising:
and when a first mutual inductance frequency identical to the preset first frequency and the preset second frequency is successfully identified from the first mutual inductance frequency, obtaining a first signal and a second signal corresponding to the first mutual inductance frequency which are successfully identified.
And when a first mutual inductance frequency which is the same as the preset first frequency and the preset second frequency cannot be identified from the first mutual inductance frequency, acquiring the first mutual inductance signal generated based on the first signal and the second signal again for decoding.
Further, encoding the second data to be transmitted to generate a third signal and a fourth signal, including:
and converting the second data to be transmitted into a binary format, and respectively compiling a third signal and a fourth signal according to the bit value of the converted second data to be transmitted.
Further, decoding the collected second mutual inductance signal includes:
the first communication terminal performs analog-to-digital conversion on the second mutual inductance signal after acquiring the second mutual inductance signal;
acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted second mutual inductance signal of the sampling number in the sampling period;
and performing FFT operation on the second mutual inductance signals of the sampling number to obtain frequency domain data values of the second mutual inductance signals, and obtaining second mutual inductance frequency according to the frequency domain data values.
Further, obtaining the sampling period and the number of samples in each of the sampling periods comprises:
obtaining a preset first frequency, a preset second frequency, a preset third frequency and a preset fourth frequency, and screening to obtain a maximum frequency FMAXAnd a minimum value FMin；
Obtaining a sampling period T and a sampling number N, wherein the sampling period T is 1/2FMinThe number of samples N is greater than or equal to T/2FMAX。
Further, identifying a corresponding third signal and a fourth signal from the decoded second mutual inductance signal, including:
and when a second mutual inductance frequency identical to the preset third frequency and the preset fourth frequency is successfully identified from the second mutual inductance frequency, obtaining a third signal and a fourth signal corresponding to the successfully identified second mutual inductance frequency.
And when a second mutual inductance frequency which is the same as the preset third frequency and the preset fourth frequency cannot be identified from the second mutual inductance frequency, acquiring the second mutual inductance signal generated based on the third signal and the fourth signal again for decoding.
Further, the method further comprises:
and performing binary conversion on the identified first signal, second signal, third signal and fourth signal, and performing communication between the second communication terminal and the first communication terminal according to the converted binary data.
A full-duplex communication system comprises a first communication end and a second communication end, wherein the first communication end comprises a first signal generator, a first calculation module and a first coil module, and the second communication end comprises a second signal generator, a second calculation module and a second coil module;
the first signal generator is used for acquiring first data to be transmitted, encoding the first data to be transmitted and generating a first signal and a second signal;
the first coil module is configured to alternately send the first signal and the second signal to the second communication terminal;
the second signal generator is configured to acquire second data to be transmitted, encode the second data to be transmitted, and generate a third signal and a fourth signal;
the second coil module is used for alternately sending the third signal and the fourth signal to the first communication terminal and is also used for generating a first mutual inductance signal based on the first signal and the second signal;
the second calculation module is used for acquiring and decoding the first mutual inductance signal, and identifying a corresponding first signal and a second signal from the decoded first mutual inductance signal;
the first coil module is further configured to generate a second mutual inductance signal based on the third signal and the fourth signal;
the first calculation module is used for acquiring and decoding the second mutual inductance signal, and identifying a third signal and a fourth signal corresponding to the second mutual inductance signal after decoding.
Further, the second calculation module is further configured to perform analog-to-digital conversion on the acquired first mutual inductance signal; acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted first mutual inductance signal of the sampling number in the sampling period; and performing FFT operation on the first mutual inductance signals of the sampling number to obtain frequency domain data values of the first mutual inductance signals, and identifying the first mutual inductance frequency according to the frequency domain data values.
Further, the first calculation module is further configured to perform analog-to-digital conversion on the acquired second mutual inductance signal; acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted second mutual inductance signal of the sampling number in the sampling period; and performing FFT operation on the second mutual inductance signals of the sampling number to obtain frequency domain data values of the second mutual inductance signals, and obtaining second mutual inductance frequency according to the frequency domain data values.
According to the technical scheme provided by the embodiment of the application, firstly, data to be transmitted between a first communication end and a second communication end of full-duplex communication are respectively compiled into signals with different preset frequencies at two ends, the signals with different preset frequencies are alternately transmitted on a coil, so that a mutual inductance signal is generated at the coil at the other end, then the mutual inductance signals superposed with various frequencies are separated through FFT (fast Fourier transform) operation, an effective mutual inductance signal is identified, and the full-duplex communication which saves system resources and is not easy to be interfered is realized through the magnetoelectric coupling communication mode and the FFT operation method.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart illustrating a full duplex communication method according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of decoding a second mutual inductance signal in the method according to the first embodiment of the present invention;
fig. 3 is a schematic flowchart of decoding a first mutual inductance signal in the method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a full-duplex communication system according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
This embodiment of the present application provides a full duplex communication method capable of implementing full duplex communication that is not easily interfered, as shown in fig. 1, the method steps include:
s101, a first communication end acquires first data to be transmitted, codes the first data to be transmitted and generates a first signal and a second signal.
In this embodiment, the first communication terminal first converts the acquired first data to be transmitted into a binary format, and then generates a first signal and a second signal according to the bit value of the converted first data to be transmitted, where in this embodiment, the first signal is defined as a "0" signal in a binary bit value, the first signal corresponds to a preset first frequency F1, the second signal is defined as a "1" signal in the binary bit value, and the second signal corresponds to a preset second frequency F2.
S102, the first communication terminal sends the first signal and the second signal to a second communication terminal alternately. Since the first signal and the second signal which are alternately transmitted have different frequencies, the coil of the first communication terminal is driven after the first signal and the second signal are transmitted to the coil, so that a mutual-inductance electromotive force signal is generated at the coil of the second communication terminal.
S201, a second communication terminal acquires second data to be transmitted, encodes the second data to be transmitted, and generates a third signal and a fourth signal.
In this embodiment, the second communication terminal first converts the acquired second data to be transmitted into a binary format, and then generates a third signal and a fourth signal according to the bit value of the converted second data to be transmitted, in this embodiment, the third signal is defined as a "0" signal in a binary bit value, the third signal corresponds to a preset third frequency F3, the fourth signal is defined as a "1" signal in the binary bit value, the fourth signal corresponds to a preset fourth frequency F4, where F1, F2, F3, and F4 are set by a system, and frequency values thereof are different from each other.
S202, the second communication terminal sends the third signal and the fourth signal to the first communication terminal alternately. And similarly, the third signal and the fourth signal are transmitted to the coil to drive the coil of the second communication terminal, so that the coil of the first communication terminal generates a mutual electromotive force signal.
In this embodiment, as shown in fig. 2 and fig. 3, after data acquisition and signal transmission drive coils are performed between the first communication terminal and the second communication terminal at the same time, the full-duplex communication method provided in this embodiment further includes the following step of separating the superposed signals from the acquired mutual inductance signals.
S103, the first communication terminal collects a second mutual inductance signal generated based on the third signal and the fourth signal, decodes the collected second mutual inductance signal, and identifies a corresponding third signal and a corresponding fourth signal from the decoded second mutual inductance signal.
Wherein the collected second mutual inductance signal is decoded, and a third signal and a fourth signal corresponding to each other are identified from the decoded second mutual inductance signal, where as shown in fig. 2, the method specifically includes:
and S301, the first communication terminal acquires the second mutual inductance signal and then performs analog-to-digital conversion on the second mutual inductance signal. And performing analog-to-digital conversion on the second mutual inductance signal to obtain an AD value of the second mutual inductance signal.
S302, acquiring a sampling period and the sampling number in the single sampling period, and acquiring the converted second mutual inductance signal of the sampling number in the sampling period.
In another embodiment of the present application, acquiring a sampling period and a number of samples in the period may specifically include: acquiring a preset first frequency,Presetting a second frequency, a third frequency and a fourth frequency, and screening to obtain a maximum frequency FMAXAnd a minimum value FMinAccording to the frequency maximum FMAXAnd the frequency minimum FMinDefining a sampling period T and a sampling number N, wherein the sampling period T is 1/2FMinThe number of samples N is greater than or equal to T/2FMAXDefining a sampling frequency and a frequency minimum value F of said sampling periodMinThe multiple relationship, at least two times, is for completeness and accuracy in data sampling. In this embodiment, the first communication terminal obtains a group of sampling data by sampling AD values of N second mutual inductance signals in each period T.
And S303, carrying out FFT operation on the second mutual inductance signals of the sampling number to obtain frequency domain data values of the second mutual inductance signals, and obtaining second mutual inductance frequency according to the frequency domain data values.
The FFT algorithm can greatly reduce the multiplication times required by a computer for calculating the discrete Fourier transform, and particularly, the larger the sampling point number N is, the more the point number is, the more the calculation amount of the FFT algorithm is saved.
In this embodiment, the FFT operation is performed on the AD value of the second mutual inductance signal, which is the N sampling points obtained by sampling, to obtain an FFT result, for example, the nth sampling point, and the complex number a + bi of the point is obtained through the operation, so that the modulus of the complex number of the sampling point is the modulus of the complex number of the sampling point
The phase is Pn ═ atan2(b, a), and based on the above calculation results, n points (n ≠ 1, and n is calculated<N/2) is: An/(N/2) × cos (2 × pi × Fn × t + Pn), i.e., 2 × An/N × cos (2 × pi × Fn × t + Pn), where Fn is the second mutual-induction frequency of the second mutual-induction signal corresponding to the sampling point.
And obtaining the frequency domain data of each sampling point according to the expression, extracting the amplitude value of the sampling point according to the frequency domain data obtained by calculation, and then obtaining the signal frequency of the sampling point based on the amplitude characteristic value. In this embodiment of the application, the second mutual inductance signal is separated through the above steps, so as to obtain a second mutual inductance frequency of the second mutual inductance signal.
S304, when a second mutual inductance frequency which is the same as the preset third frequency and the preset fourth frequency is identified from the second mutual inductance frequency, obtaining a corresponding third signal and a corresponding fourth signal according to the identified second mutual inductance frequency.
In another embodiment of the present application, if a second mutual inductance frequency identical to the preset third frequency and the preset fourth frequency cannot be identified from the second mutual inductance frequencies, the second mutual inductance signal generated based on the third signal and the fourth signal is collected again for decoding.
In this embodiment, after the first communication terminal alternately sends the first signal and the second signal to the second communication terminal, a first mutual inductance signal is generated at the second communication terminal, and the second communication terminal separates the superposed signals, which includes the specific steps of:
s203, the second communication terminal collects a first mutual inductance signal generated based on the first signal and the second signal, decodes the collected first mutual inductance signal, and identifies a corresponding first signal and a corresponding second signal from the decoded first mutual inductance signal.
In this embodiment, the second communication terminal decodes the acquired first mutual inductance signal by using an operation principle and a method for decoding a second mutual inductance signal with the first communication terminal, and identifies a corresponding first signal and a second signal from the decoded first mutual inductance signal, where as shown in fig. 3, the method specifically includes:
s401, the second communication terminal obtains the first mutual inductance signal and then carries out analog-to-digital conversion on the first mutual inductance signal.
S402, acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted first mutual inductance signal of the sampling number in the sampling period;
and S403, performing FFT operation on the first mutual inductance signals of the sampling number to obtain frequency domain data values of the first mutual inductance signals, and identifying the first mutual inductance frequency according to the frequency domain data values.
S404, when a first mutual inductance frequency which is the same as the preset first frequency and the preset second frequency is identified from the first mutual inductance frequency, obtaining a corresponding first signal and a corresponding second signal according to the identified first mutual inductance frequency.
In another embodiment of the present application, if a first mutual inductance frequency identical to the preset first frequency and the preset second frequency is not identified from the first mutual inductance frequency, the first mutual inductance signal generated based on the first signal and the second signal is collected again for decoding.
In the above embodiment, the first communication terminal and the second communication terminal perform binary conversion on the first signal, the second signal, the third signal, and the fourth signal identified after the FFT operation to obtain corresponding binary data, and perform full duplex communication between the second communication terminal and the first communication terminal according to the converted binary data.
In the above embodiment provided by the application, in full duplex communication between the first communication terminal and the second communication terminal, the first communication terminal and the second communication terminal respectively compile signals with different preset frequencies at both ends according to data to be transmitted, the signals with different preset frequencies are alternately transmitted on the coil, so that a mutual inductance signal is generated at the coil at the other end, then the mutual inductance signals with multiple superposed frequencies are separated through FFT operation, and an effective mutual inductance signal is identified.
Example two
This embodiment of the present application provides a system for implementing the full-duplex communication method of the present application, as shown in fig. 4, the system includes a first communication terminal 1 and a second communication terminal 2, the first communication terminal 1 includes a first signal generator 11, a first calculation module 12 and a first coil module 13, and the second communication terminal 2 includes a second signal generator 21, a second calculation module 22 and a second coil module 23;
the first signal generator 11 is configured to acquire first data to be transmitted, encode the first data to be transmitted, and generate a first signal and a second signal;
the first coil module 13 is configured to alternately send the first signal and the second signal to the second communication terminal 2;
the second signal generator 21 is configured to obtain second data to be sent, encode the second data to be sent, and generate a third signal and a fourth signal;
the second coil module 23 is configured to alternately send the third signal and the fourth signal to the first communication terminal 1, and is further configured to generate a first mutual inductance signal based on the first signal and the second signal;
the second calculation module 22 is configured to acquire and decode the first mutual inductance signal, and identify a corresponding first signal and a corresponding second signal from the decoded first mutual inductance signal;
the first coil module 13 is further configured to generate a second mutual inductance signal based on the third signal and the fourth signal;
the first calculating module 12 is configured to acquire and decode the second mutual inductance signal, and identify a third signal and a fourth signal corresponding to the second mutual inductance signal after decoding.
The second calculating module 22 is further configured to perform analog-to-digital conversion on the acquired first mutual inductance signal; acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted first mutual inductance signal of the sampling number in the sampling period; and performing FFT operation on the first mutual inductance signals of the sampling number to obtain frequency domain data values of the first mutual inductance signals, and identifying the first mutual inductance frequency according to the frequency domain data values.
The first calculating module 12 is further configured to perform analog-to-digital conversion on the obtained second mutual inductance signal; acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted second mutual inductance signal of the sampling number in the sampling period; and performing FFT operation on the second mutual inductance signals of the sampling number to obtain frequency domain data values of the second mutual inductance signals, and obtaining second mutual inductance frequency according to the frequency domain data values.
The communication system provided by the embodiment of the application is used for realizing the full-duplex communication method of the application, and the full-duplex communication which saves system resources and is not easy to be interfered can be realized through a magnetoelectric coupling communication mode and an FFT operation method.
The present invention is not limited to the above preferred embodiments, and any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A full duplex communication method, comprising:
a first communication terminal acquires first data to be transmitted, encodes the first data to be transmitted and generates a first signal and a second signal;
the first communication terminal sends the first signal and the second signal to a second communication terminal alternately;
a second communication terminal acquires second data to be sent, codes the second data to be sent and generates a third signal and a fourth signal;
the second communication terminal alternately transmits the third signal and the fourth signal to the first communication terminal;
the second communication terminal collects a first mutual inductance signal generated based on the first signal and the second signal, decodes the collected first mutual inductance signal, and identifies a corresponding first signal and a corresponding second signal from the decoded first mutual inductance signal;
the first communication terminal collects a second mutual inductance signal generated based on the third signal and the fourth signal, decodes the collected second mutual inductance signal, and identifies a corresponding third signal and a corresponding fourth signal from the decoded second mutual inductance signal.
2. The method of claim 1, wherein encoding the first data to be transmitted to generate a first signal and a second signal comprises:
and converting the first data to be transmitted into a binary format, and respectively compiling a first signal and a second signal according to the bit value of the converted first data to be transmitted.
3. The method of claim 1, wherein encoding the second data to be transmitted to generate a third signal and a fourth signal comprises:
and converting the second data to be transmitted into a binary format, and respectively compiling a third signal and a fourth signal according to the bit value of the converted second data to be transmitted.
4. The method of claim 1 or 2, wherein decoding the acquired first mutual inductance signal comprises:
the second communication terminal performs analog-to-digital conversion on the first mutual inductance signal after acquiring the first mutual inductance signal;
acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted first mutual inductance signal of the sampling number in the sampling period;
and performing FFT operation on the first mutual inductance signals of the sampling number to obtain frequency domain data values of the first mutual inductance signals, and identifying the first mutual inductance frequency according to the frequency domain data values.
5. The method of claim 4, wherein obtaining sampling periods and the number of samples in each of the sampling periods comprises:
obtaining a preset first frequency, a preset second frequency, a preset third frequency and a preset fourth frequency, and screening to obtain a maximum frequency FMAXAnd a minimum value FMin；
Obtaining a sampling period T and a sampling number N, wherein the sampling period T is 1/2FMinThe number of samplesThe quantity N is greater than or equal to T/2FMAX。
6. The method of claim 4, wherein identifying corresponding first and second signals from the decoded first mutual inductance signal comprises:
when a first mutual inductance frequency identical to the preset first frequency and the preset second frequency is successfully identified from the first mutual inductance frequency, obtaining a corresponding first signal and a corresponding second signal according to the successfully identified first mutual inductance frequency.
And when a first mutual inductance frequency which is the same as the preset first frequency and the preset second frequency cannot be identified from the first mutual inductance frequency, acquiring the first mutual inductance signal generated based on the first signal and the second signal again for decoding.
7. The method of claim 1 or 3, wherein decoding the second mutual inductance signal comprises:
the first communication terminal performs analog-to-digital conversion on the second mutual inductance signal after acquiring the second mutual inductance signal;
acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted second mutual inductance signal of the sampling number in the sampling period;
and performing FFT operation on the second mutual inductance signals of the sampling number to obtain frequency domain data values of the second mutual inductance signals, and obtaining second mutual inductance frequency according to the frequency domain data values.
8. The method of claim 7, wherein obtaining sampling periods and the number of samples in each of the sampling periods comprises:
obtaining a preset first frequency, a preset second frequency, a preset third frequency and a preset fourth frequency, and screening to obtain a maximum frequency FMAXAnd a minimum value FMin；
A sampling period T and a number of samples N are acquired,wherein the sampling period T is 1/2FMinThe number of samples N is greater than or equal to T/2FMAX。
9. The method of claim 7, wherein identifying corresponding third and fourth signals from the decoded second mutually induced signal comprises:
and when a second mutual inductance frequency identical to the preset third frequency and the preset fourth frequency is successfully identified from the second mutual inductance frequency, obtaining a third signal and a fourth signal corresponding to the successfully identified second mutual inductance frequency.
And when a second mutual inductance frequency which is the same as the preset third frequency and the preset fourth frequency cannot be identified from the second mutual inductance frequency, acquiring the second mutual inductance signal generated based on the third signal and the fourth signal again for decoding.
10. The method of claim 1, further comprising:
and performing binary conversion on the identified first signal, second signal, third signal and fourth signal, and performing communication between the second communication terminal and the first communication terminal according to the converted binary data.
11. A full-duplex communication system is characterized by comprising a first communication end and a second communication end, wherein the first communication end comprises a first signal generator, a first calculation module and a first coil module, and the second communication end comprises a second signal generator, a second calculation module and a second coil module;
the first signal generator is used for acquiring first data to be transmitted, encoding the first data to be transmitted and generating a first signal and a second signal;
the first coil module is configured to alternately send the first signal and the second signal to the second communication terminal;
the second signal generator is configured to acquire second data to be transmitted, encode the second data to be transmitted, and generate a third signal and a fourth signal;
the second coil module is used for alternately sending the third signal and the fourth signal to the first communication terminal and is also used for generating a first mutual inductance signal based on the first signal and the second signal;
the second calculation module is used for acquiring and decoding the first mutual inductance signal, and identifying a corresponding first signal and a second signal from the decoded first mutual inductance signal;
the first coil module is further configured to generate a second mutual inductance signal based on the third signal and the fourth signal;
the first calculation module is used for acquiring and decoding the second mutual inductance signal, and identifying a third signal and a fourth signal corresponding to the second mutual inductance signal after decoding.
12. The system of claim 11, wherein: the second calculation module is further configured to perform analog-to-digital conversion on the acquired first mutual inductance signal; acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted first mutual inductance signal of the sampling number in the sampling period; and performing FFT operation on the first mutual inductance signals of the sampling number to obtain frequency domain data values of the first mutual inductance signals, and identifying the first mutual inductance frequency according to the frequency domain data values.
13. The system of claim 12, wherein: the first calculation module is further configured to perform analog-to-digital conversion on the acquired second mutual inductance signal; acquiring a sampling period and the sampling number in a single sampling period, and acquiring the converted second mutual inductance signal of the sampling number in the sampling period; and performing FFT operation on the second mutual inductance signals of the sampling number to obtain frequency domain data values of the second mutual inductance signals, and obtaining second mutual inductance frequency according to the frequency domain data values.
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| CN114826327A (en) * | 2022-03-28 | 2022-07-29 | 南京东科优信网络安全技术研究院有限公司 | Ethernet terminal equipment signal separation method based on twisted pair characteristics |
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